3a4f1f8e46
Instead of passing a separate parameter for the key size to psa_generate_key and psa_generator_import_key, set it through the attributes, like the key type and other metadata.
3473 lines
152 KiB
C
3473 lines
152 KiB
C
/**
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* \file psa/crypto.h
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* \brief Platform Security Architecture cryptography module
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*/
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/*
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* Copyright (C) 2018, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef PSA_CRYPTO_H
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#define PSA_CRYPTO_H
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#include "crypto_platform.h"
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#include <stddef.h>
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#ifdef __DOXYGEN_ONLY__
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/* This __DOXYGEN_ONLY__ block contains mock definitions for things that
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* must be defined in the crypto_platform.h header. These mock definitions
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* are present in this file as a convenience to generate pretty-printed
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* documentation that includes those definitions. */
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/** \defgroup platform Implementation-specific definitions
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* @{
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*/
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/** \brief Key handle.
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*
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* This type represents open handles to keys. It must be an unsigned integral
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* type. The choice of type is implementation-dependent.
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*
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* 0 is not a valid key handle. How other handle values are assigned is
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* implementation-dependent.
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*/
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typedef _unsigned_integral_type_ psa_key_handle_t;
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/**@}*/
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#endif /* __DOXYGEN_ONLY__ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* The file "crypto_types.h" declares types that encode errors,
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* algorithms, key types, policies, etc. */
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#include "crypto_types.h"
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/* The file "crypto_values.h" declares macros to build and analyze values
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* of integral types defined in "crypto_types.h". */
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#include "crypto_values.h"
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/** \defgroup initialization Library initialization
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* @{
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*/
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/**
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* \brief Library initialization.
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*
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* Applications must call this function before calling any other
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* function in this module.
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*
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* Applications may call this function more than once. Once a call
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* succeeds, subsequent calls are guaranteed to succeed.
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*
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* If the application calls other functions before calling psa_crypto_init(),
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* the behavior is undefined. Implementations are encouraged to either perform
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* the operation as if the library had been initialized or to return
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* #PSA_ERROR_BAD_STATE or some other applicable error. In particular,
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* implementations should not return a success status if the lack of
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* initialization may have security implications, for example due to improper
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* seeding of the random number generator.
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*
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* \retval #PSA_SUCCESS
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* \retval #PSA_ERROR_COMMUNICATION_FAILURE
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* \retval #PSA_ERROR_HARDWARE_FAILURE
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* \retval #PSA_ERROR_TAMPERING_DETECTED
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* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY
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*/
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psa_status_t psa_crypto_init(void);
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/**@}*/
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/** \defgroup attributes Key attributes
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* @{
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*/
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/** The type of a structure containing key attributes.
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*
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* This is an opaque structure that can represent the metadata of a key
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* object, including the key type and size, domain parameters, usage policies,
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* location in storage, and any other similar information.
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*
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* The actual key material is not considered an attribute of a key.
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* Key attributes do not contain information that is generally considered
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* highly confidential.
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*
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* Before calling any function on a key attribute structure, the application
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* must initialize it by any of the following means:
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* - Set the structure to all-bits-zero, for example:
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* \code
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* psa_key_attributes_t attributes;
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* memset(&attributes, 0, sizeof(attributes));
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* \endcode
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* - Initialize the structure to logical zero values, for example:
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* \code
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* psa_key_attributes_t attributes = {0};
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* \endcode
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* - Initialize the structure to the initializer #PSA_KEY_ATTRIBUTES_INIT,
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* for example:
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* \code
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* psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
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* \endcode
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* - Assign the result of the function psa_key_attributes_init()
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* to the structure, for example:
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* \code
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* psa_key_attributes_t attributes;
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* attributes = psa_key_attributes_init();
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* \endcode
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*
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* A freshly initialized attribute structure contains the following
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* values:
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*
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* - lifetime: #PSA_KEY_LIFETIME_VOLATILE.
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* - key identifier: unspecified.
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* - type: \c 0, with no domain parameters.
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* - key size: \c 0.
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* - usage flags: \c 0.
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* - algorithm: \c 0.
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*
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* A freshly initialized attribute structure does not own any auxiliary
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* resources such as pointers to allocated memory, and therefore can be
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* freed simply by freeing the memory allocated for the structure itself.
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* This property still holds if the structure has only been modified
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* by the following functions:
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* - psa_make_key_persistent()
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* - psa_set_key_type()
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* - psa_set_key_bits()
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* - psa_set_key_usage_flags()
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* - psa_set_key_algorithm()
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* - psa_reset_key_attributes()
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* - psa_get_key_attributes() on a key which has been created with
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* attribute structure that itself did not contain auxiliary resources
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*
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* If the attribute structure has been modified with other functions,
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* you must free auxiliary resources by calling psa_reset_key_attributes().
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* The following functions may create auxiliary resouces:
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* - psa_set_key_domain_parameters()
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*/
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typedef struct psa_key_attributes_s psa_key_attributes_t;
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/** Declare a key as persistent.
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*
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* This function does not access storage, it merely fills the attribute
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* structure with given values. The persistent key will be written to
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* storage when the attribute structure is passed to a key creation
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* function such as psa_import_key(), psa_generate_key(),
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* psa_generator_import_key() or psa_copy_key().
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*
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* This function overwrites any identifier and lifetime values
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* previously set in \p attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate each of its arguments exactly once.
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*
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* \param[out] attributes The attribute structure to write to.
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* \param id The persistent identifier for the key.
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* \param lifetime The lifetime for the key.
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* If this is #PSA_KEY_LIFETIME_VOLATILE, the
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* key will be volatile, and \p id is ignored.
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*/
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static void psa_make_key_persistent(psa_key_attributes_t *attributes,
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psa_key_id_t id,
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psa_key_lifetime_t lifetime);
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/** Retrieve the key identifier from key attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate its argument exactly once.
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*
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* \param[in] attributes The key attribute structure to query.
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*
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* \return The persistent identifier stored in the attribute structure.
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* This value is unspecified if the attribute structure declares
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* the key as volatile.
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*/
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static psa_key_id_t psa_get_key_id(const psa_key_attributes_t *attributes);
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/** Retrieve the lifetime from key attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate its argument exactly once.
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*
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* \param[in] attributes The key attribute structure to query.
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*
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* \return The lifetime value stored in the attribute structure.
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*/
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static psa_key_lifetime_t psa_get_key_lifetime(
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const psa_key_attributes_t *attributes);
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/** Declare usage flags for a key.
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*
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* Usage flags are part of a key's usage policy. They encode what
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* kind of operations are permitted on the key. For more details,
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* refer to the documentation of the type #psa_key_usage_t.
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*
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* This function overwrites any usage flags
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* previously set in \p attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate each of its arguments exactly once.
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*
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* \param[out] attributes The attribute structure to write to.
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* \param usage_flags The usage flags to write.
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*/
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static void psa_set_key_usage_flags(psa_key_attributes_t *attributes,
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psa_key_usage_t usage_flags);
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/** Retrieve the usage flags from key attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate its argument exactly once.
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*
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* \param[in] attributes The key attribute structure to query.
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*
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* \return The usage flags stored in the attribute structure.
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*/
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static psa_key_usage_t psa_get_key_usage_flags(
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const psa_key_attributes_t *attributes);
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/** Declare the permitted algorithm policy for a key.
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*
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* The permitted algorithm policy of a key encodes which algorithm or
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* algorithms are permitted to be used with this key.
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*
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* This function overwrites any algorithm policy
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* previously set in \p attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate each of its arguments exactly once.
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*
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* \param[out] attributes The attribute structure to write to.
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* \param alg The permitted algorithm policy to write.
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*/
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static void psa_set_key_algorithm(psa_key_attributes_t *attributes,
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psa_algorithm_t alg);
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/** Retrieve the algorithm policy from key attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate its argument exactly once.
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*
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* \param[in] attributes The key attribute structure to query.
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*
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* \return The algorithm stored in the attribute structure.
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*/
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static psa_algorithm_t psa_get_key_algorithm(
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const psa_key_attributes_t *attributes);
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/** Declare the type of a key.
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*
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* If a type requires domain parameters, you must call
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* psa_set_key_domain_parameters() instead of this function.
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*
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* This function overwrites any key type and domain parameters
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* previously set in \p attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate each of its arguments exactly once.
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*
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* \param[out] attributes The attribute structure to write to.
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* \param type The key type to write.
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*/
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static void psa_set_key_type(psa_key_attributes_t *attributes,
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psa_key_type_t type);
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/** Declare the size of a key.
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*
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* This function overwrites any key size previously set in \p attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
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* but in this case it must evaluate each of its arguments exactly once.
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*
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* \param[out] attributes The attribute structure to write to.
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* \param bits The key size in bits.
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*/
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static void psa_set_key_bits(psa_key_attributes_t *attributes,
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size_t bits);
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/** Retrieve the key type from key attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
|
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* but in this case it must evaluate its argument exactly once.
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*
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* \param[in] attributes The key attribute structure to query.
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*
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* \return The key type stored in the attribute structure.
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*/
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static psa_key_type_t psa_get_key_type(const psa_key_attributes_t *attributes);
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/** Retrieve the key size from key attributes.
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*
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* This function may be declared as `static` (i.e. without external
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* linkage). This function may be provided as a function-like macro,
|
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* but in this case it must evaluate its argument exactly once.
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*
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* \param[in] attributes The key attribute structure to query.
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*
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* \return The key size stored in the attribute structure, in bits.
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*/
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static size_t psa_get_key_bits(const psa_key_attributes_t *attributes);
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/** Retrieve the attributes of a key.
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*
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* This function first resets the attribute structure as with
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* psa_reset_key_attributes(). It then populates the attribute
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* structure with the attributes of the given key.
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*
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* The attributes that were set when creating the key are reported in a
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* semantically equivalent manner, not necessarily with the same
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* numerical value or the same bit pattern. In this specification,
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* all key types, usage flags, algorithms and lifetime values are
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* equivalent only if they have the same numerical encoding, but this
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* property may not hold in future versions of this specification or
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* for implementation-specific values.
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*
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* \param[in] handle Handle to the key to query.
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* \param[in,out] attributes On success, the attributes of the key.
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* On failure, equivalent to a
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* freshly-initialized structure.
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*
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* \retval #PSA_SUCCESS
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* \retval #PSA_ERROR_INVALID_HANDLE
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* \retval #PSA_ERROR_COMMUNICATION_FAILURE
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*/
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psa_status_t psa_get_key_attributes(psa_key_handle_t handle,
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psa_key_attributes_t *attributes);
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/** Reset a key attribute structure to a freshly initialized state.
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*
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* You must initialize the attribute structure as described in the
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* documentation of the type #psa_key_attributes_t before calling this
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* function. Once the structure has been initialized, you may call this
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* function at any time.
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*
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* This function frees any auxiliary resources that the structure
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* may contain.
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*
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* \param[in,out] attributes The attribute structure to reset.
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*/
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void psa_reset_key_attributes(psa_key_attributes_t *attributes);
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|
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/**@}*/
|
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|
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/** \defgroup key_management Key management
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* @{
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*/
|
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|
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/** Open a handle to an existing persistent key.
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*
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* Open a handle to a key which was previously created with psa_create_key().
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*
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* \param lifetime The lifetime of the key. This designates a storage
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* area where the key material is stored. This must not
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* be #PSA_KEY_LIFETIME_VOLATILE.
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* \param id The persistent identifier of the key.
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* \param[out] handle On success, a handle to a key slot which contains
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* the data and metadata loaded from the specified
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* persistent location.
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*
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* \retval #PSA_SUCCESS
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* Success. The application can now use the value of `*handle`
|
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* to access the newly allocated key slot.
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p lifetime is invalid, for example #PSA_KEY_LIFETIME_VOLATILE.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p id is invalid for the specified lifetime.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p lifetime is not supported.
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* The specified key exists, but the application does not have the
|
|
* permission to access it. Note that this specification does not
|
|
* define any way to create such a key, but it may be possible
|
|
* through implementation-specific means.
|
|
*/
|
|
psa_status_t psa_open_key(psa_key_lifetime_t lifetime,
|
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psa_key_id_t id,
|
|
psa_key_handle_t *handle);
|
|
|
|
/** Close a key handle.
|
|
*
|
|
* If the handle designates a volatile key, destroy the key material and
|
|
* free all associated resources, just like psa_destroy_key().
|
|
*
|
|
* If the handle designates a persistent key, free all resources associated
|
|
* with the key in volatile memory. The key slot in persistent storage is
|
|
* not affected and can be opened again later with psa_open_key().
|
|
*
|
|
* If the key is currently in use in a multipart operation,
|
|
* the multipart operation is aborted.
|
|
*
|
|
* \param handle The key handle to close.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
*/
|
|
psa_status_t psa_close_key(psa_key_handle_t handle);
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup import_export Key import and export
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \brief Import a key in binary format.
|
|
*
|
|
* This function supports any output from psa_export_key(). Refer to the
|
|
* documentation of psa_export_public_key() for the format of public keys
|
|
* and to the documentation of psa_export_key() for the format for
|
|
* other key types.
|
|
*
|
|
* This specification supports a single format for each key type.
|
|
* Implementations may support other formats as long as the standard
|
|
* format is supported. Implementations that support other formats
|
|
* should ensure that the formats are clearly unambiguous so as to
|
|
* minimize the risk that an invalid input is accidentally interpreted
|
|
* according to a different format.
|
|
*
|
|
* \param[in] attributes The attributes for the new key.
|
|
* The key size field in \p attributes is
|
|
* ignored; the actual key size is determined
|
|
* from the \p data buffer.
|
|
* \param[out] handle On success, a handle to the newly created key.
|
|
* \c 0 on failure.
|
|
* \param[in] data Buffer containing the key data. The content of this
|
|
* buffer is interpreted according to the type and,
|
|
* if applicable, domain parameters declared in
|
|
* \p attributes.
|
|
* All implementations must support at least the format
|
|
* described in the documentation
|
|
* of psa_export_key() or psa_export_public_key() for
|
|
* the chosen type. Implementations may allow other
|
|
* formats, but should be conservative: implementations
|
|
* should err on the side of rejecting content if it
|
|
* may be erroneous (e.g. wrong type or truncated data).
|
|
* \param data_length Size of the \p data buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* If the key is persistent, the key material and the key's metadata
|
|
* have been saved to persistent storage.
|
|
* \retval #PSA_ERROR_ALREADY_EXISTS
|
|
* This is an attempt to create a persistent key, and there is
|
|
* already a persistent key with the given identifier.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* The key type or key size is not supported, either by the
|
|
* implementation in general or in this particular persistent location.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The key attributes, as a whole, are invalid,
|
|
* or the key data is not correctly formatted.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_INSUFFICIENT_STORAGE
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_STORAGE_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_import_key(const psa_key_attributes_t *attributes,
|
|
psa_key_handle_t *handle,
|
|
const uint8_t *data,
|
|
size_t data_length);
|
|
|
|
/**
|
|
* \brief Destroy a key.
|
|
*
|
|
* This function destroys the content of the key slot from both volatile
|
|
* memory and, if applicable, non-volatile storage. Implementations shall
|
|
* make a best effort to ensure that any previous content of the slot is
|
|
* unrecoverable.
|
|
*
|
|
* This function also erases any metadata such as policies and frees all
|
|
* resources associated with the key.
|
|
*
|
|
* If the key is currently in use in a multipart operation,
|
|
* the multipart operation is aborted.
|
|
*
|
|
* \param handle Handle to the key slot to erase.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* The slot's content, if any, has been erased.
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* The slot holds content and cannot be erased because it is
|
|
* read-only, either due to a policy or due to physical restrictions.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* There was an failure in communication with the cryptoprocessor.
|
|
* The key material may still be present in the cryptoprocessor.
|
|
* \retval #PSA_ERROR_STORAGE_FAILURE
|
|
* The storage is corrupted. Implementations shall make a best effort
|
|
* to erase key material even in this stage, however applications
|
|
* should be aware that it may be impossible to guarantee that the
|
|
* key material is not recoverable in such cases.
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* An unexpected condition which is not a storage corruption or
|
|
* a communication failure occurred. The cryptoprocessor may have
|
|
* been compromised.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_destroy_key(psa_key_handle_t handle);
|
|
|
|
/**
|
|
* \brief Set domain parameters for a key.
|
|
*
|
|
* Some key types require additional domain parameters to be set before import
|
|
* or generation of the key. The domain parameters can be set with this
|
|
* function or, for key generation, through the \c extra parameter of
|
|
* psa_generate_key().
|
|
*
|
|
* The format for the required domain parameters varies by the key type.
|
|
* - For DSA public keys (#PSA_KEY_TYPE_DSA_PUBLIC_KEY),
|
|
* the `Dss-Parms` format as defined by RFC 3279 §2.3.2.
|
|
* ```
|
|
* Dss-Parms ::= SEQUENCE {
|
|
* p INTEGER,
|
|
* q INTEGER,
|
|
* g INTEGER
|
|
* }
|
|
* ```
|
|
* - For Diffie-Hellman key exchange keys (#PSA_KEY_TYPE_DH_PUBLIC_KEY), the
|
|
* `DomainParameters` format as defined by RFC 3279 §2.3.3.
|
|
* ```
|
|
* DomainParameters ::= SEQUENCE {
|
|
* p INTEGER, -- odd prime, p=jq +1
|
|
* g INTEGER, -- generator, g
|
|
* q INTEGER, -- factor of p-1
|
|
* j INTEGER OPTIONAL, -- subgroup factor
|
|
* validationParms ValidationParms OPTIONAL
|
|
* }
|
|
* ValidationParms ::= SEQUENCE {
|
|
* seed BIT STRING,
|
|
* pgenCounter INTEGER
|
|
* }
|
|
* ```
|
|
*
|
|
* \param handle Handle to the slot where the key will be stored.
|
|
* This must be a valid slot for a key of the chosen
|
|
* type: it must have been obtained by calling
|
|
* psa_allocate_key() or psa_create_key() with the
|
|
* correct \p type and with a maximum size that is
|
|
* compatible with \p data. It must not contain
|
|
* key material yet.
|
|
* \param type Key type (a \c PSA_KEY_TYPE_XXX value). When
|
|
* subsequently creating key material into \p handle,
|
|
* the type must be compatible.
|
|
* \param[in] data Buffer containing the key domain parameters. The content
|
|
* of this buffer is interpreted according to \p type. of
|
|
* psa_export_key() or psa_export_public_key() for the
|
|
* chosen type.
|
|
* \param data_length Size of the \p data buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_OCCUPIED_SLOT
|
|
* There is already a key in the specified slot.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_set_key_domain_parameters(psa_key_handle_t handle,
|
|
psa_key_type_t type,
|
|
const uint8_t *data,
|
|
size_t data_length);
|
|
|
|
/**
|
|
* \brief Get domain parameters for a key.
|
|
*
|
|
* Get the domain parameters for a key with this function, if any. The format
|
|
* of the domain parameters written to \p data is specified in the
|
|
* documentation for psa_set_key_domain_parameters().
|
|
*
|
|
* \param handle Handle to the key to get domain parameters from.
|
|
* \param[out] data On success, the key domain parameters.
|
|
* \param data_size Size of the \p data buffer in bytes.
|
|
* \param[out] data_length On success, the number of bytes
|
|
* that make up the key domain parameters data.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_EMPTY_SLOT
|
|
* There is no key in the specified slot.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_get_key_domain_parameters(psa_key_handle_t handle,
|
|
uint8_t *data,
|
|
size_t data_size,
|
|
size_t *data_length);
|
|
|
|
/**
|
|
* \brief Export a key in binary format.
|
|
*
|
|
* The output of this function can be passed to psa_import_key() to
|
|
* create an equivalent object.
|
|
*
|
|
* If the implementation of psa_import_key() supports other formats
|
|
* beyond the format specified here, the output from psa_export_key()
|
|
* must use the representation specified here, not the original
|
|
* representation.
|
|
*
|
|
* For standard key types, the output format is as follows:
|
|
*
|
|
* - For symmetric keys (including MAC keys), the format is the
|
|
* raw bytes of the key.
|
|
* - For DES, the key data consists of 8 bytes. The parity bits must be
|
|
* correct.
|
|
* - For Triple-DES, the format is the concatenation of the
|
|
* two or three DES keys.
|
|
* - For RSA key pairs (#PSA_KEY_TYPE_RSA_KEYPAIR), the format
|
|
* is the non-encrypted DER encoding of the representation defined by
|
|
* PKCS\#1 (RFC 8017) as `RSAPrivateKey`, version 0.
|
|
* ```
|
|
* RSAPrivateKey ::= SEQUENCE {
|
|
* version INTEGER, -- must be 0
|
|
* modulus INTEGER, -- n
|
|
* publicExponent INTEGER, -- e
|
|
* privateExponent INTEGER, -- d
|
|
* prime1 INTEGER, -- p
|
|
* prime2 INTEGER, -- q
|
|
* exponent1 INTEGER, -- d mod (p-1)
|
|
* exponent2 INTEGER, -- d mod (q-1)
|
|
* coefficient INTEGER, -- (inverse of q) mod p
|
|
* }
|
|
* ```
|
|
* - For DSA private keys (#PSA_KEY_TYPE_DSA_KEYPAIR), the format is the
|
|
* representation of the private key `x` as a big-endian byte string. The
|
|
* length of the byte string is the private key size in bytes (leading zeroes
|
|
* are not stripped).
|
|
* - For elliptic curve key pairs (key types for which
|
|
* #PSA_KEY_TYPE_IS_ECC_KEYPAIR is true), the format is
|
|
* a representation of the private value as a `ceiling(m/8)`-byte string
|
|
* where `m` is the bit size associated with the curve, i.e. the bit size
|
|
* of the order of the curve's coordinate field. This byte string is
|
|
* in little-endian order for Montgomery curves (curve types
|
|
* `PSA_ECC_CURVE_CURVEXXX`), and in big-endian order for Weierstrass
|
|
* curves (curve types `PSA_ECC_CURVE_SECTXXX`, `PSA_ECC_CURVE_SECPXXX`
|
|
* and `PSA_ECC_CURVE_BRAINPOOL_PXXX`).
|
|
* This is the content of the `privateKey` field of the `ECPrivateKey`
|
|
* format defined by RFC 5915.
|
|
* - For Diffie-Hellman key exchange key pairs (#PSA_KEY_TYPE_DH_KEYPAIR), the
|
|
* format is the representation of the private key `x` as a big-endian byte
|
|
* string. The length of the byte string is the private key size in bytes
|
|
* (leading zeroes are not stripped).
|
|
* - For public keys (key types for which #PSA_KEY_TYPE_IS_PUBLIC_KEY is
|
|
* true), the format is the same as for psa_export_public_key().
|
|
*
|
|
* \param handle Handle to the key to export.
|
|
* \param[out] data Buffer where the key data is to be written.
|
|
* \param data_size Size of the \p data buffer in bytes.
|
|
* \param[out] data_length On success, the number of bytes
|
|
* that make up the key data.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p data buffer is too small. You can determine a
|
|
* sufficient buffer size by calling
|
|
* #PSA_KEY_EXPORT_MAX_SIZE(\c type, \c bits)
|
|
* where \c type is the key type
|
|
* and \c bits is the key size in bits.
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_export_key(psa_key_handle_t handle,
|
|
uint8_t *data,
|
|
size_t data_size,
|
|
size_t *data_length);
|
|
|
|
/**
|
|
* \brief Export a public key or the public part of a key pair in binary format.
|
|
*
|
|
* The output of this function can be passed to psa_import_key() to
|
|
* create an object that is equivalent to the public key.
|
|
*
|
|
* This specification supports a single format for each key type.
|
|
* Implementations may support other formats as long as the standard
|
|
* format is supported. Implementations that support other formats
|
|
* should ensure that the formats are clearly unambiguous so as to
|
|
* minimize the risk that an invalid input is accidentally interpreted
|
|
* according to a different format.
|
|
*
|
|
* For standard key types, the output format is as follows:
|
|
* - For RSA public keys (#PSA_KEY_TYPE_RSA_PUBLIC_KEY), the DER encoding of
|
|
* the representation defined by RFC 3279 §2.3.1 as `RSAPublicKey`.
|
|
* ```
|
|
* RSAPublicKey ::= SEQUENCE {
|
|
* modulus INTEGER, -- n
|
|
* publicExponent INTEGER } -- e
|
|
* ```
|
|
* - For elliptic curve public keys (key types for which
|
|
* #PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY is true), the format is the uncompressed
|
|
* representation defined by SEC1 §2.3.3 as the content of an ECPoint.
|
|
* Let `m` be the bit size associated with the curve, i.e. the bit size of
|
|
* `q` for a curve over `F_q`. The representation consists of:
|
|
* - The byte 0x04;
|
|
* - `x_P` as a `ceiling(m/8)`-byte string, big-endian;
|
|
* - `y_P` as a `ceiling(m/8)`-byte string, big-endian.
|
|
* - For DSA public keys (#PSA_KEY_TYPE_DSA_PUBLIC_KEY), the format is the
|
|
* representation of the public key `y = g^x mod p` as a big-endian byte
|
|
* string. The length of the byte string is the length of the base prime `p`
|
|
* in bytes.
|
|
* - For Diffie-Hellman key exchange public keys (#PSA_KEY_TYPE_DH_PUBLIC_KEY),
|
|
* the format is the representation of the public key `y = g^x mod p` as a
|
|
* big-endian byte string. The length of the byte string is the length of the
|
|
* base prime `p` in bytes.
|
|
*
|
|
* \param handle Handle to the key to export.
|
|
* \param[out] data Buffer where the key data is to be written.
|
|
* \param data_size Size of the \p data buffer in bytes.
|
|
* \param[out] data_length On success, the number of bytes
|
|
* that make up the key data.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The key is neither a public key nor a key pair.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p data buffer is too small. You can determine a
|
|
* sufficient buffer size by calling
|
|
* #PSA_KEY_EXPORT_MAX_SIZE(#PSA_KEY_TYPE_PUBLIC_KEY_OF_KEYPAIR(\c type), \c bits)
|
|
* where \c type is the key type
|
|
* and \c bits is the key size in bits.
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_export_public_key(psa_key_handle_t handle,
|
|
uint8_t *data,
|
|
size_t data_size,
|
|
size_t *data_length);
|
|
|
|
/** Make a copy of a key.
|
|
*
|
|
* Copy key material from one location to another.
|
|
*
|
|
* This function is primarily useful to copy a key from one location
|
|
* to another, since it populates a key using the material from
|
|
* another key which may have a different lifetime.
|
|
*
|
|
* In an implementation where slots have different ownerships,
|
|
* this function may be used to share a key with a different party,
|
|
* subject to implementation-defined restrictions on key sharing.
|
|
*
|
|
* The resulting key may only be used in a way that conforms to
|
|
* both the policy of the original key and the policy specified in
|
|
* the \p attributes parameter:
|
|
* - The usage flags on the resulting key are the bitwise-and of the
|
|
* usage flags on the source policy and the usage flags in \p attributes.
|
|
* - If both allow the same algorithm or wildcard-based
|
|
* algorithm policy, the resulting key has the same algorithm policy.
|
|
* - If either of the policies allows an algorithm and the other policy
|
|
* allows a wildcard-based algorithm policy that includes this algorithm,
|
|
* the resulting key allows the same algorithm.
|
|
* - If the policies do not allow any algorithm in common, this function
|
|
* fails with the status #PSA_ERROR_INVALID_ARGUMENT.
|
|
*
|
|
* The effect of this function on implementation-defined attributes is
|
|
* implementation-defined.
|
|
*
|
|
* \param source_handle The key to copy. It must be a handle to an
|
|
* occupied slot.
|
|
* \param[in] attributes The attributes for the new key.
|
|
* They are used as follows:
|
|
* - The key type, key size and domain parameters
|
|
* are ignored. This information is copied
|
|
* from the source key.
|
|
* - The key location (the lifetime and, for
|
|
* persistent keys, the key identifier) is
|
|
* used directly.
|
|
* - The policy constraints (usage flags and
|
|
* algorithm policy) are combined from
|
|
* the source key and \p attributes so that
|
|
* both sets of restrictions apply, as
|
|
* described in the documentation of this function.
|
|
* \param[out] target_handle On success, a handle to the newly created key.
|
|
* \c 0 on failure.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \p source_handle is invalid.
|
|
* \retval #PSA_ERROR_ALREADY_EXISTS
|
|
* This is an attempt to create a persistent key, and there is
|
|
* already a persistent key with the given identifier.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The lifetime or identifier in \p attributes are invalid.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The policy constraints on the source and specified in
|
|
* \p attributes are incompatible.
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* The source key is not exportable and its lifetime does not
|
|
* allow copying it to the target's lifetime.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_INSUFFICIENT_STORAGE
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_copy_key(psa_key_handle_t source_handle,
|
|
const psa_key_attributes_t *attributes,
|
|
psa_key_handle_t *target_handle);
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup hash Message digests
|
|
* @{
|
|
*/
|
|
|
|
/** Calculate the hash (digest) of a message.
|
|
*
|
|
* \note To verify the hash of a message against an
|
|
* expected value, use psa_hash_compare() instead.
|
|
*
|
|
* \param alg The hash algorithm to compute (\c PSA_ALG_XXX value
|
|
* such that #PSA_ALG_IS_HASH(\p alg) is true).
|
|
* \param[in] input Buffer containing the message to hash.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[out] hash Buffer where the hash is to be written.
|
|
* \param hash_size Size of the \p hash buffer in bytes.
|
|
* \param[out] hash_length On success, the number of bytes
|
|
* that make up the hash value. This is always
|
|
* #PSA_HASH_SIZE(\p alg).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a hash algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_hash_compute(psa_algorithm_t alg,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
uint8_t *hash,
|
|
size_t hash_size,
|
|
size_t *hash_length);
|
|
|
|
/** Calculate the hash (digest) of a message and compare it with a
|
|
* reference value.
|
|
*
|
|
* \param alg The hash algorithm to compute (\c PSA_ALG_XXX value
|
|
* such that #PSA_ALG_IS_HASH(\p alg) is true).
|
|
* \param[in] input Buffer containing the message to hash.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[out] hash Buffer containing the expected hash value.
|
|
* \param hash_length Size of the \p hash buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* The expected hash is identical to the actual hash of the input.
|
|
* \retval #PSA_ERROR_INVALID_SIGNATURE
|
|
* The hash of the message was calculated successfully, but it
|
|
* differs from the expected hash.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a hash algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_hash_compare(psa_algorithm_t alg,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
const uint8_t *hash,
|
|
const size_t hash_length);
|
|
|
|
/** The type of the state data structure for multipart hash operations.
|
|
*
|
|
* Before calling any function on a hash operation object, the application must
|
|
* initialize it by any of the following means:
|
|
* - Set the structure to all-bits-zero, for example:
|
|
* \code
|
|
* psa_hash_operation_t operation;
|
|
* memset(&operation, 0, sizeof(operation));
|
|
* \endcode
|
|
* - Initialize the structure to logical zero values, for example:
|
|
* \code
|
|
* psa_hash_operation_t operation = {0};
|
|
* \endcode
|
|
* - Initialize the structure to the initializer #PSA_HASH_OPERATION_INIT,
|
|
* for example:
|
|
* \code
|
|
* psa_hash_operation_t operation = PSA_HASH_OPERATION_INIT;
|
|
* \endcode
|
|
* - Assign the result of the function psa_hash_operation_init()
|
|
* to the structure, for example:
|
|
* \code
|
|
* psa_hash_operation_t operation;
|
|
* operation = psa_hash_operation_init();
|
|
* \endcode
|
|
*
|
|
* This is an implementation-defined \c struct. Applications should not
|
|
* make any assumptions about the content of this structure except
|
|
* as directed by the documentation of a specific implementation. */
|
|
typedef struct psa_hash_operation_s psa_hash_operation_t;
|
|
|
|
/** \def PSA_HASH_OPERATION_INIT
|
|
*
|
|
* This macro returns a suitable initializer for a hash operation object
|
|
* of type #psa_hash_operation_t.
|
|
*/
|
|
#ifdef __DOXYGEN_ONLY__
|
|
/* This is an example definition for documentation purposes.
|
|
* Implementations should define a suitable value in `crypto_struct.h`.
|
|
*/
|
|
#define PSA_HASH_OPERATION_INIT {0}
|
|
#endif
|
|
|
|
/** Return an initial value for a hash operation object.
|
|
*/
|
|
static psa_hash_operation_t psa_hash_operation_init(void);
|
|
|
|
/** Set up a multipart hash operation.
|
|
*
|
|
* The sequence of operations to calculate a hash (message digest)
|
|
* is as follows:
|
|
* -# Allocate an operation object which will be passed to all the functions
|
|
* listed here.
|
|
* -# Initialize the operation object with one of the methods described in the
|
|
* documentation for #psa_hash_operation_t, e.g. PSA_HASH_OPERATION_INIT.
|
|
* -# Call psa_hash_setup() to specify the algorithm.
|
|
* -# Call psa_hash_update() zero, one or more times, passing a fragment
|
|
* of the message each time. The hash that is calculated is the hash
|
|
* of the concatenation of these messages in order.
|
|
* -# To calculate the hash, call psa_hash_finish().
|
|
* To compare the hash with an expected value, call psa_hash_verify().
|
|
*
|
|
* The application may call psa_hash_abort() at any time after the operation
|
|
* has been initialized.
|
|
*
|
|
* After a successful call to psa_hash_setup(), the application must
|
|
* eventually terminate the operation. The following events terminate an
|
|
* operation:
|
|
* - A failed call to psa_hash_update().
|
|
* - A call to psa_hash_finish(), psa_hash_verify() or psa_hash_abort().
|
|
*
|
|
* \param[in,out] operation The operation object to set up. It must have
|
|
* been initialized as per the documentation for
|
|
* #psa_hash_operation_t and not yet in use.
|
|
* \param alg The hash algorithm to compute (\c PSA_ALG_XXX value
|
|
* such that #PSA_ALG_IS_HASH(\p alg) is true).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a hash algorithm.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (already set up and not
|
|
* subsequently completed).
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_hash_setup(psa_hash_operation_t *operation,
|
|
psa_algorithm_t alg);
|
|
|
|
/** Add a message fragment to a multipart hash operation.
|
|
*
|
|
* The application must call psa_hash_setup() before calling this function.
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \param[in,out] operation Active hash operation.
|
|
* \param[in] input Buffer containing the message fragment to hash.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or already completed).
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_hash_update(psa_hash_operation_t *operation,
|
|
const uint8_t *input,
|
|
size_t input_length);
|
|
|
|
/** Finish the calculation of the hash of a message.
|
|
*
|
|
* The application must call psa_hash_setup() before calling this function.
|
|
* This function calculates the hash of the message formed by concatenating
|
|
* the inputs passed to preceding calls to psa_hash_update().
|
|
*
|
|
* When this function returns, the operation becomes inactive.
|
|
*
|
|
* \warning Applications should not call this function if they expect
|
|
* a specific value for the hash. Call psa_hash_verify() instead.
|
|
* Beware that comparing integrity or authenticity data such as
|
|
* hash values with a function such as \c memcmp is risky
|
|
* because the time taken by the comparison may leak information
|
|
* about the hashed data which could allow an attacker to guess
|
|
* a valid hash and thereby bypass security controls.
|
|
*
|
|
* \param[in,out] operation Active hash operation.
|
|
* \param[out] hash Buffer where the hash is to be written.
|
|
* \param hash_size Size of the \p hash buffer in bytes.
|
|
* \param[out] hash_length On success, the number of bytes
|
|
* that make up the hash value. This is always
|
|
* #PSA_HASH_SIZE(\c alg) where \c alg is the
|
|
* hash algorithm that is calculated.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or already completed).
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p hash buffer is too small. You can determine a
|
|
* sufficient buffer size by calling #PSA_HASH_SIZE(\c alg)
|
|
* where \c alg is the hash algorithm that is calculated.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_hash_finish(psa_hash_operation_t *operation,
|
|
uint8_t *hash,
|
|
size_t hash_size,
|
|
size_t *hash_length);
|
|
|
|
/** Finish the calculation of the hash of a message and compare it with
|
|
* an expected value.
|
|
*
|
|
* The application must call psa_hash_setup() before calling this function.
|
|
* This function calculates the hash of the message formed by concatenating
|
|
* the inputs passed to preceding calls to psa_hash_update(). It then
|
|
* compares the calculated hash with the expected hash passed as a
|
|
* parameter to this function.
|
|
*
|
|
* When this function returns, the operation becomes inactive.
|
|
*
|
|
* \note Implementations shall make the best effort to ensure that the
|
|
* comparison between the actual hash and the expected hash is performed
|
|
* in constant time.
|
|
*
|
|
* \param[in,out] operation Active hash operation.
|
|
* \param[in] hash Buffer containing the expected hash value.
|
|
* \param hash_length Size of the \p hash buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* The expected hash is identical to the actual hash of the message.
|
|
* \retval #PSA_ERROR_INVALID_SIGNATURE
|
|
* The hash of the message was calculated successfully, but it
|
|
* differs from the expected hash.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or already completed).
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_hash_verify(psa_hash_operation_t *operation,
|
|
const uint8_t *hash,
|
|
size_t hash_length);
|
|
|
|
/** Abort a hash operation.
|
|
*
|
|
* Aborting an operation frees all associated resources except for the
|
|
* \p operation structure itself. Once aborted, the operation object
|
|
* can be reused for another operation by calling
|
|
* psa_hash_setup() again.
|
|
*
|
|
* You may call this function any time after the operation object has
|
|
* been initialized by any of the following methods:
|
|
* - A call to psa_hash_setup(), whether it succeeds or not.
|
|
* - Initializing the \c struct to all-bits-zero.
|
|
* - Initializing the \c struct to logical zeros, e.g.
|
|
* `psa_hash_operation_t operation = {0}`.
|
|
*
|
|
* In particular, calling psa_hash_abort() after the operation has been
|
|
* terminated by a call to psa_hash_abort(), psa_hash_finish() or
|
|
* psa_hash_verify() is safe and has no effect.
|
|
*
|
|
* \param[in,out] operation Initialized hash operation.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \p operation is not an active hash operation.
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_hash_abort(psa_hash_operation_t *operation);
|
|
|
|
/** Clone a hash operation.
|
|
*
|
|
* This function copies the state of an ongoing hash operation to
|
|
* a new operation object. In other words, this function is equivalent
|
|
* to calling psa_hash_setup() on \p target_operation with the same
|
|
* algorithm that \p source_operation was set up for, then
|
|
* psa_hash_update() on \p target_operation with the same input that
|
|
* that was passed to \p source_operation. After this function returns, the
|
|
* two objects are independent, i.e. subsequent calls involving one of
|
|
* the objects do not affect the other object.
|
|
*
|
|
* \param[in] source_operation The active hash operation to clone.
|
|
* \param[in,out] target_operation The operation object to set up.
|
|
* It must be initialized but not active.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \p source_operation is not an active hash operation.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \p target_operation is active.
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_hash_clone(const psa_hash_operation_t *source_operation,
|
|
psa_hash_operation_t *target_operation);
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup MAC Message authentication codes
|
|
* @{
|
|
*/
|
|
|
|
/** Calculate the MAC (message authentication code) of a message.
|
|
*
|
|
* \note To verify the MAC of a message against an
|
|
* expected value, use psa_mac_verify() instead.
|
|
* Beware that comparing integrity or authenticity data such as
|
|
* MAC values with a function such as \c memcmp is risky
|
|
* because the time taken by the comparison may leak information
|
|
* about the MAC value which could allow an attacker to guess
|
|
* a valid MAC and thereby bypass security controls.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* \param alg The MAC algorithm to compute (\c PSA_ALG_XXX value
|
|
* such that #PSA_ALG_IS_MAC(\p alg) is true).
|
|
* \param[in] input Buffer containing the input message.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[out] mac Buffer where the MAC value is to be written.
|
|
* \param mac_size Size of the \p mac buffer in bytes.
|
|
* \param[out] mac_length On success, the number of bytes
|
|
* that make up the MAC value.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_EMPTY_SLOT
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a MAC algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_mac_compute(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
uint8_t *mac,
|
|
size_t mac_size,
|
|
size_t *mac_length);
|
|
|
|
/** Calculate the MAC of a message and compare it with a reference value.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* \param alg The MAC algorithm to compute (\c PSA_ALG_XXX value
|
|
* such that #PSA_ALG_IS_MAC(\p alg) is true).
|
|
* \param[in] input Buffer containing the input message.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[out] mac Buffer containing the expected MAC value.
|
|
* \param mac_length Size of the \p mac buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* The expected MAC is identical to the actual MAC of the input.
|
|
* \retval #PSA_ERROR_INVALID_SIGNATURE
|
|
* The MAC of the message was calculated successfully, but it
|
|
* differs from the expected value.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_EMPTY_SLOT
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a MAC algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_mac_verify(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
const uint8_t *mac,
|
|
const size_t mac_length);
|
|
|
|
/** The type of the state data structure for multipart MAC operations.
|
|
*
|
|
* Before calling any function on a MAC operation object, the application must
|
|
* initialize it by any of the following means:
|
|
* - Set the structure to all-bits-zero, for example:
|
|
* \code
|
|
* psa_mac_operation_t operation;
|
|
* memset(&operation, 0, sizeof(operation));
|
|
* \endcode
|
|
* - Initialize the structure to logical zero values, for example:
|
|
* \code
|
|
* psa_mac_operation_t operation = {0};
|
|
* \endcode
|
|
* - Initialize the structure to the initializer #PSA_MAC_OPERATION_INIT,
|
|
* for example:
|
|
* \code
|
|
* psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
|
|
* \endcode
|
|
* - Assign the result of the function psa_mac_operation_init()
|
|
* to the structure, for example:
|
|
* \code
|
|
* psa_mac_operation_t operation;
|
|
* operation = psa_mac_operation_init();
|
|
* \endcode
|
|
*
|
|
* This is an implementation-defined \c struct. Applications should not
|
|
* make any assumptions about the content of this structure except
|
|
* as directed by the documentation of a specific implementation. */
|
|
typedef struct psa_mac_operation_s psa_mac_operation_t;
|
|
|
|
/** \def PSA_MAC_OPERATION_INIT
|
|
*
|
|
* This macro returns a suitable initializer for a MAC operation object of type
|
|
* #psa_mac_operation_t.
|
|
*/
|
|
#ifdef __DOXYGEN_ONLY__
|
|
/* This is an example definition for documentation purposes.
|
|
* Implementations should define a suitable value in `crypto_struct.h`.
|
|
*/
|
|
#define PSA_MAC_OPERATION_INIT {0}
|
|
#endif
|
|
|
|
/** Return an initial value for a MAC operation object.
|
|
*/
|
|
static psa_mac_operation_t psa_mac_operation_init(void);
|
|
|
|
/** Set up a multipart MAC calculation operation.
|
|
*
|
|
* This function sets up the calculation of the MAC
|
|
* (message authentication code) of a byte string.
|
|
* To verify the MAC of a message against an
|
|
* expected value, use psa_mac_verify_setup() instead.
|
|
*
|
|
* The sequence of operations to calculate a MAC is as follows:
|
|
* -# Allocate an operation object which will be passed to all the functions
|
|
* listed here.
|
|
* -# Initialize the operation object with one of the methods described in the
|
|
* documentation for #psa_mac_operation_t, e.g. PSA_MAC_OPERATION_INIT.
|
|
* -# Call psa_mac_sign_setup() to specify the algorithm and key.
|
|
* -# Call psa_mac_update() zero, one or more times, passing a fragment
|
|
* of the message each time. The MAC that is calculated is the MAC
|
|
* of the concatenation of these messages in order.
|
|
* -# At the end of the message, call psa_mac_sign_finish() to finish
|
|
* calculating the MAC value and retrieve it.
|
|
*
|
|
* The application may call psa_mac_abort() at any time after the operation
|
|
* has been initialized.
|
|
*
|
|
* After a successful call to psa_mac_sign_setup(), the application must
|
|
* eventually terminate the operation through one of the following methods:
|
|
* - A failed call to psa_mac_update().
|
|
* - A call to psa_mac_sign_finish() or psa_mac_abort().
|
|
*
|
|
* \param[in,out] operation The operation object to set up. It must have
|
|
* been initialized as per the documentation for
|
|
* #psa_mac_operation_t and not yet in use.
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must remain valid until the operation
|
|
* terminates.
|
|
* \param alg The MAC algorithm to compute (\c PSA_ALG_XXX value
|
|
* such that #PSA_ALG_IS_MAC(\p alg) is true).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a MAC algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (already set up and not
|
|
* subsequently completed).
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_mac_sign_setup(psa_mac_operation_t *operation,
|
|
psa_key_handle_t handle,
|
|
psa_algorithm_t alg);
|
|
|
|
/** Set up a multipart MAC verification operation.
|
|
*
|
|
* This function sets up the verification of the MAC
|
|
* (message authentication code) of a byte string against an expected value.
|
|
*
|
|
* The sequence of operations to verify a MAC is as follows:
|
|
* -# Allocate an operation object which will be passed to all the functions
|
|
* listed here.
|
|
* -# Initialize the operation object with one of the methods described in the
|
|
* documentation for #psa_mac_operation_t, e.g. PSA_MAC_OPERATION_INIT.
|
|
* -# Call psa_mac_verify_setup() to specify the algorithm and key.
|
|
* -# Call psa_mac_update() zero, one or more times, passing a fragment
|
|
* of the message each time. The MAC that is calculated is the MAC
|
|
* of the concatenation of these messages in order.
|
|
* -# At the end of the message, call psa_mac_verify_finish() to finish
|
|
* calculating the actual MAC of the message and verify it against
|
|
* the expected value.
|
|
*
|
|
* The application may call psa_mac_abort() at any time after the operation
|
|
* has been initialized.
|
|
*
|
|
* After a successful call to psa_mac_verify_setup(), the application must
|
|
* eventually terminate the operation through one of the following methods:
|
|
* - A failed call to psa_mac_update().
|
|
* - A call to psa_mac_verify_finish() or psa_mac_abort().
|
|
*
|
|
* \param[in,out] operation The operation object to set up. It must have
|
|
* been initialized as per the documentation for
|
|
* #psa_mac_operation_t and not yet in use.
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must remain valid until the operation
|
|
* terminates.
|
|
* \param alg The MAC algorithm to compute (\c PSA_ALG_XXX value
|
|
* such that #PSA_ALG_IS_MAC(\p alg) is true).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \c key is not compatible with \c alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \c alg is not supported or is not a MAC algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (already set up and not
|
|
* subsequently completed).
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_mac_verify_setup(psa_mac_operation_t *operation,
|
|
psa_key_handle_t handle,
|
|
psa_algorithm_t alg);
|
|
|
|
/** Add a message fragment to a multipart MAC operation.
|
|
*
|
|
* The application must call psa_mac_sign_setup() or psa_mac_verify_setup()
|
|
* before calling this function.
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \param[in,out] operation Active MAC operation.
|
|
* \param[in] input Buffer containing the message fragment to add to
|
|
* the MAC calculation.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or already completed).
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_mac_update(psa_mac_operation_t *operation,
|
|
const uint8_t *input,
|
|
size_t input_length);
|
|
|
|
/** Finish the calculation of the MAC of a message.
|
|
*
|
|
* The application must call psa_mac_sign_setup() before calling this function.
|
|
* This function calculates the MAC of the message formed by concatenating
|
|
* the inputs passed to preceding calls to psa_mac_update().
|
|
*
|
|
* When this function returns, the operation becomes inactive.
|
|
*
|
|
* \warning Applications should not call this function if they expect
|
|
* a specific value for the MAC. Call psa_mac_verify_finish() instead.
|
|
* Beware that comparing integrity or authenticity data such as
|
|
* MAC values with a function such as \c memcmp is risky
|
|
* because the time taken by the comparison may leak information
|
|
* about the MAC value which could allow an attacker to guess
|
|
* a valid MAC and thereby bypass security controls.
|
|
*
|
|
* \param[in,out] operation Active MAC operation.
|
|
* \param[out] mac Buffer where the MAC value is to be written.
|
|
* \param mac_size Size of the \p mac buffer in bytes.
|
|
* \param[out] mac_length On success, the number of bytes
|
|
* that make up the MAC value. This is always
|
|
* #PSA_MAC_FINAL_SIZE(\c key_type, \c key_bits, \c alg)
|
|
* where \c key_type and \c key_bits are the type and
|
|
* bit-size respectively of the key and \c alg is the
|
|
* MAC algorithm that is calculated.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or already completed).
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p mac buffer is too small. You can determine a
|
|
* sufficient buffer size by calling PSA_MAC_FINAL_SIZE().
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_mac_sign_finish(psa_mac_operation_t *operation,
|
|
uint8_t *mac,
|
|
size_t mac_size,
|
|
size_t *mac_length);
|
|
|
|
/** Finish the calculation of the MAC of a message and compare it with
|
|
* an expected value.
|
|
*
|
|
* The application must call psa_mac_verify_setup() before calling this function.
|
|
* This function calculates the MAC of the message formed by concatenating
|
|
* the inputs passed to preceding calls to psa_mac_update(). It then
|
|
* compares the calculated MAC with the expected MAC passed as a
|
|
* parameter to this function.
|
|
*
|
|
* When this function returns, the operation becomes inactive.
|
|
*
|
|
* \note Implementations shall make the best effort to ensure that the
|
|
* comparison between the actual MAC and the expected MAC is performed
|
|
* in constant time.
|
|
*
|
|
* \param[in,out] operation Active MAC operation.
|
|
* \param[in] mac Buffer containing the expected MAC value.
|
|
* \param mac_length Size of the \p mac buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* The expected MAC is identical to the actual MAC of the message.
|
|
* \retval #PSA_ERROR_INVALID_SIGNATURE
|
|
* The MAC of the message was calculated successfully, but it
|
|
* differs from the expected MAC.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or already completed).
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_mac_verify_finish(psa_mac_operation_t *operation,
|
|
const uint8_t *mac,
|
|
size_t mac_length);
|
|
|
|
/** Abort a MAC operation.
|
|
*
|
|
* Aborting an operation frees all associated resources except for the
|
|
* \p operation structure itself. Once aborted, the operation object
|
|
* can be reused for another operation by calling
|
|
* psa_mac_sign_setup() or psa_mac_verify_setup() again.
|
|
*
|
|
* You may call this function any time after the operation object has
|
|
* been initialized by any of the following methods:
|
|
* - A call to psa_mac_sign_setup() or psa_mac_verify_setup(), whether
|
|
* it succeeds or not.
|
|
* - Initializing the \c struct to all-bits-zero.
|
|
* - Initializing the \c struct to logical zeros, e.g.
|
|
* `psa_mac_operation_t operation = {0}`.
|
|
*
|
|
* In particular, calling psa_mac_abort() after the operation has been
|
|
* terminated by a call to psa_mac_abort(), psa_mac_sign_finish() or
|
|
* psa_mac_verify_finish() is safe and has no effect.
|
|
*
|
|
* \param[in,out] operation Initialized MAC operation.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \p operation is not an active MAC operation.
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_mac_abort(psa_mac_operation_t *operation);
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup cipher Symmetric ciphers
|
|
* @{
|
|
*/
|
|
|
|
/** Encrypt a message using a symmetric cipher.
|
|
*
|
|
* This function encrypts a message with a random IV (initialization
|
|
* vector).
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must remain valid until the operation
|
|
* terminates.
|
|
* \param alg The cipher algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_CIPHER(\p alg) is true).
|
|
* \param[in] input Buffer containing the message to encrypt.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[out] output Buffer where the output is to be written.
|
|
* The output contains the IV followed by
|
|
* the ciphertext proper.
|
|
* \param output_size Size of the \p output buffer in bytes.
|
|
* \param[out] output_length On success, the number of bytes
|
|
* that make up the output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_EMPTY_SLOT
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a cipher algorithm.
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_cipher_encrypt(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
uint8_t *output,
|
|
size_t output_size,
|
|
size_t *output_length);
|
|
|
|
/** Decrypt a message using a symmetric cipher.
|
|
*
|
|
* This function decrypts a message encrypted with a symmetric cipher.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must remain valid until the operation
|
|
* terminates.
|
|
* \param alg The cipher algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_CIPHER(\p alg) is true).
|
|
* \param[in] input Buffer containing the message to decrypt.
|
|
* This consists of the IV followed by the
|
|
* ciphertext proper.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[out] output Buffer where the plaintext is to be written.
|
|
* \param output_size Size of the \p output buffer in bytes.
|
|
* \param[out] output_length On success, the number of bytes
|
|
* that make up the output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_EMPTY_SLOT
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a cipher algorithm.
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_cipher_decrypt(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
uint8_t *output,
|
|
size_t output_size,
|
|
size_t *output_length);
|
|
|
|
/** The type of the state data structure for multipart cipher operations.
|
|
*
|
|
* Before calling any function on a cipher operation object, the application
|
|
* must initialize it by any of the following means:
|
|
* - Set the structure to all-bits-zero, for example:
|
|
* \code
|
|
* psa_cipher_operation_t operation;
|
|
* memset(&operation, 0, sizeof(operation));
|
|
* \endcode
|
|
* - Initialize the structure to logical zero values, for example:
|
|
* \code
|
|
* psa_cipher_operation_t operation = {0};
|
|
* \endcode
|
|
* - Initialize the structure to the initializer #PSA_CIPHER_OPERATION_INIT,
|
|
* for example:
|
|
* \code
|
|
* psa_cipher_operation_t operation = PSA_CIPHER_OPERATION_INIT;
|
|
* \endcode
|
|
* - Assign the result of the function psa_cipher_operation_init()
|
|
* to the structure, for example:
|
|
* \code
|
|
* psa_cipher_operation_t operation;
|
|
* operation = psa_cipher_operation_init();
|
|
* \endcode
|
|
*
|
|
* This is an implementation-defined \c struct. Applications should not
|
|
* make any assumptions about the content of this structure except
|
|
* as directed by the documentation of a specific implementation. */
|
|
typedef struct psa_cipher_operation_s psa_cipher_operation_t;
|
|
|
|
/** \def PSA_CIPHER_OPERATION_INIT
|
|
*
|
|
* This macro returns a suitable initializer for a cipher operation object of
|
|
* type #psa_cipher_operation_t.
|
|
*/
|
|
#ifdef __DOXYGEN_ONLY__
|
|
/* This is an example definition for documentation purposes.
|
|
* Implementations should define a suitable value in `crypto_struct.h`.
|
|
*/
|
|
#define PSA_CIPHER_OPERATION_INIT {0}
|
|
#endif
|
|
|
|
/** Return an initial value for a cipher operation object.
|
|
*/
|
|
static psa_cipher_operation_t psa_cipher_operation_init(void);
|
|
|
|
/** Set the key for a multipart symmetric encryption operation.
|
|
*
|
|
* The sequence of operations to encrypt a message with a symmetric cipher
|
|
* is as follows:
|
|
* -# Allocate an operation object which will be passed to all the functions
|
|
* listed here.
|
|
* -# Initialize the operation object with one of the methods described in the
|
|
* documentation for #psa_cipher_operation_t, e.g.
|
|
* PSA_CIPHER_OPERATION_INIT.
|
|
* -# Call psa_cipher_encrypt_setup() to specify the algorithm and key.
|
|
* -# Call either psa_cipher_generate_iv() or psa_cipher_set_iv() to
|
|
* generate or set the IV (initialization vector). You should use
|
|
* psa_cipher_generate_iv() unless the protocol you are implementing
|
|
* requires a specific IV value.
|
|
* -# Call psa_cipher_update() zero, one or more times, passing a fragment
|
|
* of the message each time.
|
|
* -# Call psa_cipher_finish().
|
|
*
|
|
* The application may call psa_cipher_abort() at any time after the operation
|
|
* has been initialized.
|
|
*
|
|
* After a successful call to psa_cipher_encrypt_setup(), the application must
|
|
* eventually terminate the operation. The following events terminate an
|
|
* operation:
|
|
* - A failed call to any of the \c psa_cipher_xxx functions.
|
|
* - A call to psa_cipher_finish() or psa_cipher_abort().
|
|
*
|
|
* \param[in,out] operation The operation object to set up. It must have
|
|
* been initialized as per the documentation for
|
|
* #psa_cipher_operation_t and not yet in use.
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must remain valid until the operation
|
|
* terminates.
|
|
* \param alg The cipher algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_CIPHER(\p alg) is true).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a cipher algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (already set up and not
|
|
* subsequently completed).
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_cipher_encrypt_setup(psa_cipher_operation_t *operation,
|
|
psa_key_handle_t handle,
|
|
psa_algorithm_t alg);
|
|
|
|
/** Set the key for a multipart symmetric decryption operation.
|
|
*
|
|
* The sequence of operations to decrypt a message with a symmetric cipher
|
|
* is as follows:
|
|
* -# Allocate an operation object which will be passed to all the functions
|
|
* listed here.
|
|
* -# Initialize the operation object with one of the methods described in the
|
|
* documentation for #psa_cipher_operation_t, e.g.
|
|
* PSA_CIPHER_OPERATION_INIT.
|
|
* -# Call psa_cipher_decrypt_setup() to specify the algorithm and key.
|
|
* -# Call psa_cipher_set_iv() with the IV (initialization vector) for the
|
|
* decryption. If the IV is prepended to the ciphertext, you can call
|
|
* psa_cipher_update() on a buffer containing the IV followed by the
|
|
* beginning of the message.
|
|
* -# Call psa_cipher_update() zero, one or more times, passing a fragment
|
|
* of the message each time.
|
|
* -# Call psa_cipher_finish().
|
|
*
|
|
* The application may call psa_cipher_abort() at any time after the operation
|
|
* has been initialized.
|
|
*
|
|
* After a successful call to psa_cipher_decrypt_setup(), the application must
|
|
* eventually terminate the operation. The following events terminate an
|
|
* operation:
|
|
* - A failed call to any of the \c psa_cipher_xxx functions.
|
|
* - A call to psa_cipher_finish() or psa_cipher_abort().
|
|
*
|
|
* \param[in,out] operation The operation object to set up. It must have
|
|
* been initialized as per the documentation for
|
|
* #psa_cipher_operation_t and not yet in use.
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must remain valid until the operation
|
|
* terminates.
|
|
* \param alg The cipher algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_CIPHER(\p alg) is true).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not a cipher algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (already set up and not
|
|
* subsequently completed).
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_cipher_decrypt_setup(psa_cipher_operation_t *operation,
|
|
psa_key_handle_t handle,
|
|
psa_algorithm_t alg);
|
|
|
|
/** Generate an IV for a symmetric encryption operation.
|
|
*
|
|
* This function generates a random IV (initialization vector), nonce
|
|
* or initial counter value for the encryption operation as appropriate
|
|
* for the chosen algorithm, key type and key size.
|
|
*
|
|
* The application must call psa_cipher_encrypt_setup() before
|
|
* calling this function.
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \param[in,out] operation Active cipher operation.
|
|
* \param[out] iv Buffer where the generated IV is to be written.
|
|
* \param iv_size Size of the \p iv buffer in bytes.
|
|
* \param[out] iv_length On success, the number of bytes of the
|
|
* generated IV.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or IV already set).
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p iv buffer is too small.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_cipher_generate_iv(psa_cipher_operation_t *operation,
|
|
unsigned char *iv,
|
|
size_t iv_size,
|
|
size_t *iv_length);
|
|
|
|
/** Set the IV for a symmetric encryption or decryption operation.
|
|
*
|
|
* This function sets the IV (initialization vector), nonce
|
|
* or initial counter value for the encryption or decryption operation.
|
|
*
|
|
* The application must call psa_cipher_encrypt_setup() before
|
|
* calling this function.
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \note When encrypting, applications should use psa_cipher_generate_iv()
|
|
* instead of this function, unless implementing a protocol that requires
|
|
* a non-random IV.
|
|
*
|
|
* \param[in,out] operation Active cipher operation.
|
|
* \param[in] iv Buffer containing the IV to use.
|
|
* \param iv_length Size of the IV in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or IV already set).
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The size of \p iv is not acceptable for the chosen algorithm,
|
|
* or the chosen algorithm does not use an IV.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_cipher_set_iv(psa_cipher_operation_t *operation,
|
|
const unsigned char *iv,
|
|
size_t iv_length);
|
|
|
|
/** Encrypt or decrypt a message fragment in an active cipher operation.
|
|
*
|
|
* Before calling this function, you must:
|
|
* 1. Call either psa_cipher_encrypt_setup() or psa_cipher_decrypt_setup().
|
|
* The choice of setup function determines whether this function
|
|
* encrypts or decrypts its input.
|
|
* 2. If the algorithm requires an IV, call psa_cipher_generate_iv()
|
|
* (recommended when encrypting) or psa_cipher_set_iv().
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \param[in,out] operation Active cipher operation.
|
|
* \param[in] input Buffer containing the message fragment to
|
|
* encrypt or decrypt.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[out] output Buffer where the output is to be written.
|
|
* \param output_size Size of the \p output buffer in bytes.
|
|
* \param[out] output_length On success, the number of bytes
|
|
* that make up the returned output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, IV required but
|
|
* not set, or already completed).
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p output buffer is too small.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_cipher_update(psa_cipher_operation_t *operation,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
unsigned char *output,
|
|
size_t output_size,
|
|
size_t *output_length);
|
|
|
|
/** Finish encrypting or decrypting a message in a cipher operation.
|
|
*
|
|
* The application must call psa_cipher_encrypt_setup() or
|
|
* psa_cipher_decrypt_setup() before calling this function. The choice
|
|
* of setup function determines whether this function encrypts or
|
|
* decrypts its input.
|
|
*
|
|
* This function finishes the encryption or decryption of the message
|
|
* formed by concatenating the inputs passed to preceding calls to
|
|
* psa_cipher_update().
|
|
*
|
|
* When this function returns, the operation becomes inactive.
|
|
*
|
|
* \param[in,out] operation Active cipher operation.
|
|
* \param[out] output Buffer where the output is to be written.
|
|
* \param output_size Size of the \p output buffer in bytes.
|
|
* \param[out] output_length On success, the number of bytes
|
|
* that make up the returned output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, IV required but
|
|
* not set, or already completed).
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p output buffer is too small.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_cipher_finish(psa_cipher_operation_t *operation,
|
|
uint8_t *output,
|
|
size_t output_size,
|
|
size_t *output_length);
|
|
|
|
/** Abort a cipher operation.
|
|
*
|
|
* Aborting an operation frees all associated resources except for the
|
|
* \p operation structure itself. Once aborted, the operation object
|
|
* can be reused for another operation by calling
|
|
* psa_cipher_encrypt_setup() or psa_cipher_decrypt_setup() again.
|
|
*
|
|
* You may call this function any time after the operation object has
|
|
* been initialized by any of the following methods:
|
|
* - A call to psa_cipher_encrypt_setup() or psa_cipher_decrypt_setup(),
|
|
* whether it succeeds or not.
|
|
* - Initializing the \c struct to all-bits-zero.
|
|
* - Initializing the \c struct to logical zeros, e.g.
|
|
* `psa_cipher_operation_t operation = {0}`.
|
|
*
|
|
* In particular, calling psa_cipher_abort() after the operation has been
|
|
* terminated by a call to psa_cipher_abort() or psa_cipher_finish()
|
|
* is safe and has no effect.
|
|
*
|
|
* \param[in,out] operation Initialized cipher operation.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \p operation is not an active cipher operation.
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_cipher_abort(psa_cipher_operation_t *operation);
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup aead Authenticated encryption with associated data (AEAD)
|
|
* @{
|
|
*/
|
|
|
|
/** Process an authenticated encryption operation.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* \param alg The AEAD algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_AEAD(\p alg) is true).
|
|
* \param[in] nonce Nonce or IV to use.
|
|
* \param nonce_length Size of the \p nonce buffer in bytes.
|
|
* \param[in] additional_data Additional data that will be authenticated
|
|
* but not encrypted.
|
|
* \param additional_data_length Size of \p additional_data in bytes.
|
|
* \param[in] plaintext Data that will be authenticated and
|
|
* encrypted.
|
|
* \param plaintext_length Size of \p plaintext in bytes.
|
|
* \param[out] ciphertext Output buffer for the authenticated and
|
|
* encrypted data. The additional data is not
|
|
* part of this output. For algorithms where the
|
|
* encrypted data and the authentication tag
|
|
* are defined as separate outputs, the
|
|
* authentication tag is appended to the
|
|
* encrypted data.
|
|
* \param ciphertext_size Size of the \p ciphertext buffer in bytes.
|
|
* This must be at least
|
|
* #PSA_AEAD_ENCRYPT_OUTPUT_SIZE(\p alg,
|
|
* \p plaintext_length).
|
|
* \param[out] ciphertext_length On success, the size of the output
|
|
* in the \p ciphertext buffer.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not an AEAD algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_aead_encrypt(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *nonce,
|
|
size_t nonce_length,
|
|
const uint8_t *additional_data,
|
|
size_t additional_data_length,
|
|
const uint8_t *plaintext,
|
|
size_t plaintext_length,
|
|
uint8_t *ciphertext,
|
|
size_t ciphertext_size,
|
|
size_t *ciphertext_length);
|
|
|
|
/** Process an authenticated decryption operation.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* \param alg The AEAD algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_AEAD(\p alg) is true).
|
|
* \param[in] nonce Nonce or IV to use.
|
|
* \param nonce_length Size of the \p nonce buffer in bytes.
|
|
* \param[in] additional_data Additional data that has been authenticated
|
|
* but not encrypted.
|
|
* \param additional_data_length Size of \p additional_data in bytes.
|
|
* \param[in] ciphertext Data that has been authenticated and
|
|
* encrypted. For algorithms where the
|
|
* encrypted data and the authentication tag
|
|
* are defined as separate inputs, the buffer
|
|
* must contain the encrypted data followed
|
|
* by the authentication tag.
|
|
* \param ciphertext_length Size of \p ciphertext in bytes.
|
|
* \param[out] plaintext Output buffer for the decrypted data.
|
|
* \param plaintext_size Size of the \p plaintext buffer in bytes.
|
|
* This must be at least
|
|
* #PSA_AEAD_DECRYPT_OUTPUT_SIZE(\p alg,
|
|
* \p ciphertext_length).
|
|
* \param[out] plaintext_length On success, the size of the output
|
|
* in the \p plaintext buffer.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_INVALID_SIGNATURE
|
|
* The ciphertext is not authentic.
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not an AEAD algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_aead_decrypt(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *nonce,
|
|
size_t nonce_length,
|
|
const uint8_t *additional_data,
|
|
size_t additional_data_length,
|
|
const uint8_t *ciphertext,
|
|
size_t ciphertext_length,
|
|
uint8_t *plaintext,
|
|
size_t plaintext_size,
|
|
size_t *plaintext_length);
|
|
|
|
/** The type of the state data structure for multipart AEAD operations.
|
|
*
|
|
* Before calling any function on an AEAD operation object, the application
|
|
* must initialize it by any of the following means:
|
|
* - Set the structure to all-bits-zero, for example:
|
|
* \code
|
|
* psa_aead_operation_t operation;
|
|
* memset(&operation, 0, sizeof(operation));
|
|
* \endcode
|
|
* - Initialize the structure to logical zero values, for example:
|
|
* \code
|
|
* psa_aead_operation_t operation = {0};
|
|
* \endcode
|
|
* - Initialize the structure to the initializer #PSA_AEAD_OPERATION_INIT,
|
|
* for example:
|
|
* \code
|
|
* psa_aead_operation_t operation = PSA_AEAD_OPERATION_INIT;
|
|
* \endcode
|
|
* - Assign the result of the function psa_aead_operation_init()
|
|
* to the structure, for example:
|
|
* \code
|
|
* psa_aead_operation_t operation;
|
|
* operation = psa_aead_operation_init();
|
|
* \endcode
|
|
*
|
|
* This is an implementation-defined \c struct. Applications should not
|
|
* make any assumptions about the content of this structure except
|
|
* as directed by the documentation of a specific implementation. */
|
|
typedef struct psa_aead_operation_s psa_aead_operation_t;
|
|
|
|
/** \def PSA_AEAD_OPERATION_INIT
|
|
*
|
|
* This macro returns a suitable initializer for an AEAD operation object of
|
|
* type #psa_aead_operation_t.
|
|
*/
|
|
#ifdef __DOXYGEN_ONLY__
|
|
/* This is an example definition for documentation purposes.
|
|
* Implementations should define a suitable value in `crypto_struct.h`.
|
|
*/
|
|
#define PSA_AEAD_OPERATION_INIT {0}
|
|
#endif
|
|
|
|
/** Return an initial value for an AEAD operation object.
|
|
*/
|
|
static psa_aead_operation_t psa_aead_operation_init(void);
|
|
|
|
/** Set the key for a multipart authenticated encryption operation.
|
|
*
|
|
* The sequence of operations to encrypt a message with authentication
|
|
* is as follows:
|
|
* -# Allocate an operation object which will be passed to all the functions
|
|
* listed here.
|
|
* -# Initialize the operation object with one of the methods described in the
|
|
* documentation for #psa_aead_operation_t, e.g.
|
|
* PSA_AEAD_OPERATION_INIT.
|
|
* -# Call psa_aead_encrypt_setup() to specify the algorithm and key.
|
|
* -# If needed, call psa_aead_set_lengths() to specify the length of the
|
|
* inputs to the subsequent calls to psa_aead_update_ad() and
|
|
* psa_aead_update(). See the documentation of psa_aead_set_lengths()
|
|
* for details.
|
|
* -# Call either psa_aead_generate_nonce() or psa_aead_set_nonce() to
|
|
* generate or set the nonce. You should use
|
|
* psa_aead_generate_nonce() unless the protocol you are implementing
|
|
* requires a specific nonce value.
|
|
* -# Call psa_aead_update_ad() zero, one or more times, passing a fragment
|
|
* of the non-encrypted additional authenticated data each time.
|
|
* -# Call psa_aead_update() zero, one or more times, passing a fragment
|
|
* of the message to encrypt each time.
|
|
* -# Call psa_aead_finish().
|
|
*
|
|
* The application may call psa_aead_abort() at any time after the operation
|
|
* has been initialized.
|
|
*
|
|
* After a successful call to psa_aead_encrypt_setup(), the application must
|
|
* eventually terminate the operation. The following events terminate an
|
|
* operation:
|
|
* - A failed call to any of the \c psa_aead_xxx functions.
|
|
* - A call to psa_aead_finish(), psa_aead_verify() or psa_aead_abort().
|
|
*
|
|
* \param[in,out] operation The operation object to set up. It must have
|
|
* been initialized as per the documentation for
|
|
* #psa_aead_operation_t and not yet in use.
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must remain valid until the operation
|
|
* terminates.
|
|
* \param alg The AEAD algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_AEAD(\p alg) is true).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_EMPTY_SLOT
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not an AEAD algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_aead_encrypt_setup(psa_aead_operation_t *operation,
|
|
psa_key_handle_t handle,
|
|
psa_algorithm_t alg);
|
|
|
|
/** Set the key for a multipart authenticated decryption operation.
|
|
*
|
|
* The sequence of operations to decrypt a message with authentication
|
|
* is as follows:
|
|
* -# Allocate an operation object which will be passed to all the functions
|
|
* listed here.
|
|
* -# Initialize the operation object with one of the methods described in the
|
|
* documentation for #psa_aead_operation_t, e.g.
|
|
* PSA_AEAD_OPERATION_INIT.
|
|
* -# Call psa_aead_decrypt_setup() to specify the algorithm and key.
|
|
* -# If needed, call psa_aead_set_lengths() to specify the length of the
|
|
* inputs to the subsequent calls to psa_aead_update_ad() and
|
|
* psa_aead_update(). See the documentation of psa_aead_set_lengths()
|
|
* for details.
|
|
* -# Call psa_aead_set_nonce() with the nonce for the decryption.
|
|
* -# Call psa_aead_update_ad() zero, one or more times, passing a fragment
|
|
* of the non-encrypted additional authenticated data each time.
|
|
* -# Call psa_aead_update() zero, one or more times, passing a fragment
|
|
* of the ciphertext to decrypt each time.
|
|
* -# Call psa_aead_verify().
|
|
*
|
|
* The application may call psa_aead_abort() at any time after the operation
|
|
* has been initialized.
|
|
*
|
|
* After a successful call to psa_aead_decrypt_setup(), the application must
|
|
* eventually terminate the operation. The following events terminate an
|
|
* operation:
|
|
* - A failed call to any of the \c psa_aead_xxx functions.
|
|
* - A call to psa_aead_finish(), psa_aead_verify() or psa_aead_abort().
|
|
*
|
|
* \param[in,out] operation The operation object to set up. It must have
|
|
* been initialized as per the documentation for
|
|
* #psa_aead_operation_t and not yet in use.
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must remain valid until the operation
|
|
* terminates.
|
|
* \param alg The AEAD algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_AEAD(\p alg) is true).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_EMPTY_SLOT
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p handle is not compatible with \p alg.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not supported or is not an AEAD algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_aead_decrypt_setup(psa_aead_operation_t *operation,
|
|
psa_key_handle_t handle,
|
|
psa_algorithm_t alg);
|
|
|
|
/** Generate a random nonce for an authenticated encryption operation.
|
|
*
|
|
* This function generates a random nonce for the authenticated encryption
|
|
* operation with an appropriate size for the chosen algorithm, key type
|
|
* and key size.
|
|
*
|
|
* The application must call psa_aead_encrypt_setup() before
|
|
* calling this function.
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \param[in,out] operation Active AEAD operation.
|
|
* \param[out] nonce Buffer where the generated nonce is to be
|
|
* written.
|
|
* \param nonce_size Size of the \p nonce buffer in bytes.
|
|
* \param[out] nonce_length On success, the number of bytes of the
|
|
* generated nonce.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or nonce already set).
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p nonce buffer is too small.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_aead_generate_nonce(psa_aead_operation_t *operation,
|
|
unsigned char *nonce,
|
|
size_t nonce_size,
|
|
size_t *nonce_length);
|
|
|
|
/** Set the nonce for an authenticated encryption or decryption operation.
|
|
*
|
|
* This function sets the nonce for the authenticated
|
|
* encryption or decryption operation.
|
|
*
|
|
* The application must call psa_aead_encrypt_setup() before
|
|
* calling this function.
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \note When encrypting, applications should use psa_aead_generate_nonce()
|
|
* instead of this function, unless implementing a protocol that requires
|
|
* a non-random IV.
|
|
*
|
|
* \param[in,out] operation Active AEAD operation.
|
|
* \param[in] nonce Buffer containing the nonce to use.
|
|
* \param nonce_length Size of the nonce in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, or nonce already set).
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The size of \p nonce is not acceptable for the chosen algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_aead_set_nonce(psa_aead_operation_t *operation,
|
|
const unsigned char *nonce,
|
|
size_t nonce_length);
|
|
|
|
/** Declare the lengths of the message and additional data for AEAD.
|
|
*
|
|
* The application must call this function before calling
|
|
* psa_aead_update_ad() or psa_aead_update() if the algorithm for
|
|
* the operation requires it. If the algorithm does not require it,
|
|
* calling this function is optional, but if this function is called
|
|
* then the implementation must enforce the lengths.
|
|
*
|
|
* You may call this function before or after setting the nonce with
|
|
* psa_aead_set_nonce() or psa_aead_generate_nonce().
|
|
*
|
|
* - For #PSA_ALG_CCM, calling this function is required.
|
|
* - For the other AEAD algorithms defined in this specification, calling
|
|
* this function is not required.
|
|
* - For vendor-defined algorithm, refer to the vendor documentation.
|
|
*
|
|
* \param[in,out] operation Active AEAD operation.
|
|
* \param ad_length Size of the non-encrypted additional
|
|
* authenticated data in bytes.
|
|
* \param plaintext_length Size of the plaintext to encrypt in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, already completed,
|
|
* or psa_aead_update_ad() or psa_aead_update() already called).
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* At least one of the lengths is not acceptable for the chosen
|
|
* algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_aead_set_lengths(psa_aead_operation_t *operation,
|
|
size_t ad_length,
|
|
size_t plaintext_length);
|
|
|
|
/** Pass additional data to an active AEAD operation.
|
|
*
|
|
* Additional data is authenticated, but not encrypted.
|
|
*
|
|
* You may call this function multiple times to pass successive fragments
|
|
* of the additional data. You may not call this function after passing
|
|
* data to encrypt or decrypt with psa_aead_update().
|
|
*
|
|
* Before calling this function, you must:
|
|
* 1. Call either psa_aead_encrypt_setup() or psa_aead_decrypt_setup().
|
|
* 2. Set the nonce with psa_aead_generate_nonce() or psa_aead_set_nonce().
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \warning When decrypting, until psa_aead_verify() has returned #PSA_SUCCESS,
|
|
* there is no guarantee that the input is valid. Therefore, until
|
|
* you have called psa_aead_verify() and it has returned #PSA_SUCCESS,
|
|
* treat the input as untrusted and prepare to undo any action that
|
|
* depends on the input if psa_aead_verify() returns an error status.
|
|
*
|
|
* \param[in,out] operation Active AEAD operation.
|
|
* \param[in] input Buffer containing the fragment of
|
|
* additional data.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, nonce not set,
|
|
* psa_aead_update() already called, or operation already completed).
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The total input length overflows the additional data length that
|
|
* was previously specified with psa_aead_set_lengths().
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_aead_update_ad(psa_aead_operation_t *operation,
|
|
const uint8_t *input,
|
|
size_t input_length);
|
|
|
|
/** Encrypt or decrypt a message fragment in an active AEAD operation.
|
|
*
|
|
* Before calling this function, you must:
|
|
* 1. Call either psa_aead_encrypt_setup() or psa_aead_decrypt_setup().
|
|
* The choice of setup function determines whether this function
|
|
* encrypts or decrypts its input.
|
|
* 2. Set the nonce with psa_aead_generate_nonce() or psa_aead_set_nonce().
|
|
* 3. Call psa_aead_update_ad() to pass all the additional data.
|
|
*
|
|
* If this function returns an error status, the operation becomes inactive.
|
|
*
|
|
* \warning When decrypting, until psa_aead_verify() has returned #PSA_SUCCESS,
|
|
* there is no guarantee that the input is valid. Therefore, until
|
|
* you have called psa_aead_verify() and it has returned #PSA_SUCCESS:
|
|
* - Do not use the output in any way other than storing it in a
|
|
* confidential location. If you take any action that depends
|
|
* on the tentative decrypted data, this action will need to be
|
|
* undone if the input turns out not to be valid. Furthermore,
|
|
* if an adversary can observe that this action took place
|
|
* (for example through timing), they may be able to use this
|
|
* fact as an oracle to decrypt any message encrypted with the
|
|
* same key.
|
|
* - In particular, do not copy the output anywhere but to a
|
|
* memory or storage space that you have exclusive access to.
|
|
*
|
|
* \param[in,out] operation Active AEAD operation.
|
|
* \param[in] input Buffer containing the message fragment to
|
|
* encrypt or decrypt.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[out] output Buffer where the output is to be written.
|
|
* \param output_size Size of the \p output buffer in bytes.
|
|
* \param[out] output_length On success, the number of bytes
|
|
* that make up the returned output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, nonce not set
|
|
* or already completed).
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p output buffer is too small.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The total length of input to psa_aead_update_ad() so far is
|
|
* less than the additional data length that was previously
|
|
* specified with psa_aead_set_lengths().
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The total input length overflows the plaintext length that
|
|
* was previously specified with psa_aead_set_lengths().
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_aead_update(psa_aead_operation_t *operation,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
unsigned char *output,
|
|
size_t output_size,
|
|
size_t *output_length);
|
|
|
|
/** Finish encrypting a message in an AEAD operation.
|
|
*
|
|
* The operation must have been set up with psa_aead_encrypt_setup().
|
|
*
|
|
* This function finishes the authentication of the additional data
|
|
* formed by concatenating the inputs passed to preceding calls to
|
|
* psa_aead_update_ad() with the plaintext formed by concatenating the
|
|
* inputs passed to preceding calls to psa_aead_update().
|
|
*
|
|
* This function has two output buffers:
|
|
* - \p ciphertext contains trailing ciphertext that was buffered from
|
|
* preceding calls to psa_aead_update(). For all standard AEAD algorithms,
|
|
* psa_aead_update() does not buffer any output and therefore \p ciphertext
|
|
* will not contain any output and can be a 0-sized buffer.
|
|
* - \p tag contains the authentication tag. Its length is always
|
|
* #PSA_AEAD_TAG_LENGTH(\c alg) where \c alg is the AEAD algorithm
|
|
* that the operation performs.
|
|
*
|
|
* When this function returns, the operation becomes inactive.
|
|
*
|
|
* \param[in,out] operation Active AEAD operation.
|
|
* \param[out] ciphertext Buffer where the last part of the ciphertext
|
|
* is to be written.
|
|
* \param ciphertext_size Size of the \p ciphertext buffer in bytes.
|
|
* \param[out] ciphertext_length On success, the number of bytes of
|
|
* returned ciphertext.
|
|
* \param[out] tag Buffer where the authentication tag is
|
|
* to be written.
|
|
* \param tag_size Size of the \p tag buffer in bytes.
|
|
* \param[out] tag_length On success, the number of bytes
|
|
* that make up the returned tag.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, nonce not set,
|
|
* decryption, or already completed).
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p ciphertext or \p tag buffer is too small.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The total length of input to psa_aead_update_ad() so far is
|
|
* less than the additional data length that was previously
|
|
* specified with psa_aead_set_lengths().
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The total length of input to psa_aead_update() so far is
|
|
* less than the plaintext length that was previously
|
|
* specified with psa_aead_set_lengths().
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_aead_finish(psa_aead_operation_t *operation,
|
|
uint8_t *ciphertext,
|
|
size_t ciphertext_size,
|
|
size_t *ciphertext_length,
|
|
uint8_t *tag,
|
|
size_t tag_size,
|
|
size_t *tag_length);
|
|
|
|
/** Finish authenticating and decrypting a message in an AEAD operation.
|
|
*
|
|
* The operation must have been set up with psa_aead_decrypt_setup().
|
|
*
|
|
* This function finishes the authentication of the additional data
|
|
* formed by concatenating the inputs passed to preceding calls to
|
|
* psa_aead_update_ad() with the ciphertext formed by concatenating the
|
|
* inputs passed to preceding calls to psa_aead_update().
|
|
*
|
|
* When this function returns, the operation becomes inactive.
|
|
*
|
|
* \param[in,out] operation Active AEAD operation.
|
|
* \param[in] tag Buffer containing the authentication tag.
|
|
* \param tag_length Size of the \p tag buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The operation state is not valid (not set up, nonce not set,
|
|
* encryption, or already completed).
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The total length of input to psa_aead_update_ad() so far is
|
|
* less than the additional data length that was previously
|
|
* specified with psa_aead_set_lengths().
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* The total length of input to psa_aead_update() so far is
|
|
* less than the plaintext length that was previously
|
|
* specified with psa_aead_set_lengths().
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_aead_verify(psa_aead_operation_t *operation,
|
|
const uint8_t *tag,
|
|
size_t tag_length);
|
|
|
|
/** Abort an AEAD operation.
|
|
*
|
|
* Aborting an operation frees all associated resources except for the
|
|
* \p operation structure itself. Once aborted, the operation object
|
|
* can be reused for another operation by calling
|
|
* psa_aead_encrypt_setup() or psa_aead_decrypt_setup() again.
|
|
*
|
|
* You may call this function any time after the operation object has
|
|
* been initialized by any of the following methods:
|
|
* - A call to psa_aead_encrypt_setup() or psa_aead_decrypt_setup(),
|
|
* whether it succeeds or not.
|
|
* - Initializing the \c struct to all-bits-zero.
|
|
* - Initializing the \c struct to logical zeros, e.g.
|
|
* `psa_aead_operation_t operation = {0}`.
|
|
*
|
|
* In particular, calling psa_aead_abort() after the operation has been
|
|
* terminated by a call to psa_aead_abort() or psa_aead_finish()
|
|
* is safe and has no effect.
|
|
*
|
|
* \param[in,out] operation Initialized AEAD operation.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \p operation is not an active AEAD operation.
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_aead_abort(psa_aead_operation_t *operation);
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup asymmetric Asymmetric cryptography
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \brief Sign a hash or short message with a private key.
|
|
*
|
|
* Note that to perform a hash-and-sign signature algorithm, you must
|
|
* first calculate the hash by calling psa_hash_setup(), psa_hash_update()
|
|
* and psa_hash_finish(). Then pass the resulting hash as the \p hash
|
|
* parameter to this function. You can use #PSA_ALG_SIGN_GET_HASH(\p alg)
|
|
* to determine the hash algorithm to use.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must be an asymmetric key pair.
|
|
* \param alg A signature algorithm that is compatible with
|
|
* the type of \p handle.
|
|
* \param[in] hash The hash or message to sign.
|
|
* \param hash_length Size of the \p hash buffer in bytes.
|
|
* \param[out] signature Buffer where the signature is to be written.
|
|
* \param signature_size Size of the \p signature buffer in bytes.
|
|
* \param[out] signature_length On success, the number of bytes
|
|
* that make up the returned signature value.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p signature buffer is too small. You can
|
|
* determine a sufficient buffer size by calling
|
|
* #PSA_ASYMMETRIC_SIGN_OUTPUT_SIZE(\c key_type, \c key_bits, \p alg)
|
|
* where \c key_type and \c key_bits are the type and bit-size
|
|
* respectively of \p handle.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_asymmetric_sign(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *hash,
|
|
size_t hash_length,
|
|
uint8_t *signature,
|
|
size_t signature_size,
|
|
size_t *signature_length);
|
|
|
|
/**
|
|
* \brief Verify the signature a hash or short message using a public key.
|
|
*
|
|
* Note that to perform a hash-and-sign signature algorithm, you must
|
|
* first calculate the hash by calling psa_hash_setup(), psa_hash_update()
|
|
* and psa_hash_finish(). Then pass the resulting hash as the \p hash
|
|
* parameter to this function. You can use #PSA_ALG_SIGN_GET_HASH(\p alg)
|
|
* to determine the hash algorithm to use.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must be a public key or an asymmetric key pair.
|
|
* \param alg A signature algorithm that is compatible with
|
|
* the type of \p handle.
|
|
* \param[in] hash The hash or message whose signature is to be
|
|
* verified.
|
|
* \param hash_length Size of the \p hash buffer in bytes.
|
|
* \param[in] signature Buffer containing the signature to verify.
|
|
* \param signature_length Size of the \p signature buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* The signature is valid.
|
|
* \retval #PSA_ERROR_INVALID_SIGNATURE
|
|
* The calculation was perfomed successfully, but the passed
|
|
* signature is not a valid signature.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_asymmetric_verify(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *hash,
|
|
size_t hash_length,
|
|
const uint8_t *signature,
|
|
size_t signature_length);
|
|
|
|
/**
|
|
* \brief Encrypt a short message with a public key.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must be a public key or an asymmetric
|
|
* key pair.
|
|
* \param alg An asymmetric encryption algorithm that is
|
|
* compatible with the type of \p handle.
|
|
* \param[in] input The message to encrypt.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[in] salt A salt or label, if supported by the
|
|
* encryption algorithm.
|
|
* If the algorithm does not support a
|
|
* salt, pass \c NULL.
|
|
* If the algorithm supports an optional
|
|
* salt and you do not want to pass a salt,
|
|
* pass \c NULL.
|
|
*
|
|
* - For #PSA_ALG_RSA_PKCS1V15_CRYPT, no salt is
|
|
* supported.
|
|
* \param salt_length Size of the \p salt buffer in bytes.
|
|
* If \p salt is \c NULL, pass 0.
|
|
* \param[out] output Buffer where the encrypted message is to
|
|
* be written.
|
|
* \param output_size Size of the \p output buffer in bytes.
|
|
* \param[out] output_length On success, the number of bytes
|
|
* that make up the returned output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p output buffer is too small. You can
|
|
* determine a sufficient buffer size by calling
|
|
* #PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(\c key_type, \c key_bits, \p alg)
|
|
* where \c key_type and \c key_bits are the type and bit-size
|
|
* respectively of \p handle.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_asymmetric_encrypt(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
const uint8_t *salt,
|
|
size_t salt_length,
|
|
uint8_t *output,
|
|
size_t output_size,
|
|
size_t *output_length);
|
|
|
|
/**
|
|
* \brief Decrypt a short message with a private key.
|
|
*
|
|
* \param handle Handle to the key to use for the operation.
|
|
* It must be an asymmetric key pair.
|
|
* \param alg An asymmetric encryption algorithm that is
|
|
* compatible with the type of \p handle.
|
|
* \param[in] input The message to decrypt.
|
|
* \param input_length Size of the \p input buffer in bytes.
|
|
* \param[in] salt A salt or label, if supported by the
|
|
* encryption algorithm.
|
|
* If the algorithm does not support a
|
|
* salt, pass \c NULL.
|
|
* If the algorithm supports an optional
|
|
* salt and you do not want to pass a salt,
|
|
* pass \c NULL.
|
|
*
|
|
* - For #PSA_ALG_RSA_PKCS1V15_CRYPT, no salt is
|
|
* supported.
|
|
* \param salt_length Size of the \p salt buffer in bytes.
|
|
* If \p salt is \c NULL, pass 0.
|
|
* \param[out] output Buffer where the decrypted message is to
|
|
* be written.
|
|
* \param output_size Size of the \c output buffer in bytes.
|
|
* \param[out] output_length On success, the number of bytes
|
|
* that make up the returned output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
|
|
* The size of the \p output buffer is too small. You can
|
|
* determine a sufficient buffer size by calling
|
|
* #PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(\c key_type, \c key_bits, \p alg)
|
|
* where \c key_type and \c key_bits are the type and bit-size
|
|
* respectively of \p handle.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY
|
|
* \retval #PSA_ERROR_INVALID_PADDING
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_asymmetric_decrypt(psa_key_handle_t handle,
|
|
psa_algorithm_t alg,
|
|
const uint8_t *input,
|
|
size_t input_length,
|
|
const uint8_t *salt,
|
|
size_t salt_length,
|
|
uint8_t *output,
|
|
size_t output_size,
|
|
size_t *output_length);
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup generators Generators
|
|
* @{
|
|
*/
|
|
|
|
/** The type of the state data structure for generators.
|
|
*
|
|
* Before calling any function on a generator, the application must
|
|
* initialize it by any of the following means:
|
|
* - Set the structure to all-bits-zero, for example:
|
|
* \code
|
|
* psa_crypto_generator_t generator;
|
|
* memset(&generator, 0, sizeof(generator));
|
|
* \endcode
|
|
* - Initialize the structure to logical zero values, for example:
|
|
* \code
|
|
* psa_crypto_generator_t generator = {0};
|
|
* \endcode
|
|
* - Initialize the structure to the initializer #PSA_CRYPTO_GENERATOR_INIT,
|
|
* for example:
|
|
* \code
|
|
* psa_crypto_generator_t generator = PSA_CRYPTO_GENERATOR_INIT;
|
|
* \endcode
|
|
* - Assign the result of the function psa_crypto_generator_init()
|
|
* to the structure, for example:
|
|
* \code
|
|
* psa_crypto_generator_t generator;
|
|
* generator = psa_crypto_generator_init();
|
|
* \endcode
|
|
*
|
|
* This is an implementation-defined \c struct. Applications should not
|
|
* make any assumptions about the content of this structure except
|
|
* as directed by the documentation of a specific implementation.
|
|
*/
|
|
typedef struct psa_crypto_generator_s psa_crypto_generator_t;
|
|
|
|
/** \def PSA_CRYPTO_GENERATOR_INIT
|
|
*
|
|
* This macro returns a suitable initializer for a generator object
|
|
* of type #psa_crypto_generator_t.
|
|
*/
|
|
#ifdef __DOXYGEN_ONLY__
|
|
/* This is an example definition for documentation purposes.
|
|
* Implementations should define a suitable value in `crypto_struct.h`.
|
|
*/
|
|
#define PSA_CRYPTO_GENERATOR_INIT {0}
|
|
#endif
|
|
|
|
/** Return an initial value for a generator object.
|
|
*/
|
|
static psa_crypto_generator_t psa_crypto_generator_init(void);
|
|
|
|
/** Retrieve the current capacity of a generator.
|
|
*
|
|
* The capacity of a generator is the maximum number of bytes that it can
|
|
* return. Reading *N* bytes from a generator reduces its capacity by *N*.
|
|
*
|
|
* \param[in] generator The generator to query.
|
|
* \param[out] capacity On success, the capacity of the generator.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
*/
|
|
psa_status_t psa_get_generator_capacity(const psa_crypto_generator_t *generator,
|
|
size_t *capacity);
|
|
|
|
/** Set the maximum capacity of a generator.
|
|
*
|
|
* \param[in,out] generator The generator object to modify.
|
|
* \param capacity The new capacity of the generator.
|
|
* It must be less or equal to the generator's
|
|
* current capacity.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p capacity is larger than the generator's current capacity.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
*/
|
|
psa_status_t psa_set_generator_capacity(psa_crypto_generator_t *generator,
|
|
size_t capacity);
|
|
|
|
/** Read some data from a generator.
|
|
*
|
|
* This function reads and returns a sequence of bytes from a generator.
|
|
* The data that is read is discarded from the generator. The generator's
|
|
* capacity is decreased by the number of bytes read.
|
|
*
|
|
* \param[in,out] generator The generator object to read from.
|
|
* \param[out] output Buffer where the generator output will be
|
|
* written.
|
|
* \param output_length Number of bytes to output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_INSUFFICIENT_DATA
|
|
* There were fewer than \p output_length bytes
|
|
* in the generator. Note that in this case, no
|
|
* output is written to the output buffer.
|
|
* The generator's capacity is set to 0, thus
|
|
* subsequent calls to this function will not
|
|
* succeed, even with a smaller output buffer.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_generator_read(psa_crypto_generator_t *generator,
|
|
uint8_t *output,
|
|
size_t output_length);
|
|
|
|
/** Generate a key deterministically from data read from a generator.
|
|
*
|
|
* This function uses the output of a generator to derive a key.
|
|
* How much output it consumes and how the key is derived depends on the
|
|
* key type.
|
|
*
|
|
* - For key types for which the key is an arbitrary sequence of bytes
|
|
* of a given size,
|
|
* this function is functionally equivalent to calling #psa_generator_read
|
|
* and passing the resulting output to #psa_import_key.
|
|
* However, this function has a security benefit:
|
|
* if the implementation provides an isolation boundary then
|
|
* the key material is not exposed outside the isolation boundary.
|
|
* As a consequence, for these key types, this function always consumes
|
|
* exactly (\p bits / 8) bytes from the generator.
|
|
* The following key types defined in this specification follow this scheme:
|
|
*
|
|
* - #PSA_KEY_TYPE_AES;
|
|
* - #PSA_KEY_TYPE_ARC4;
|
|
* - #PSA_KEY_TYPE_CAMELLIA;
|
|
* - #PSA_KEY_TYPE_DERIVE;
|
|
* - #PSA_KEY_TYPE_HMAC.
|
|
*
|
|
* - For ECC keys on a Montgomery elliptic curve
|
|
* (#PSA_KEY_TYPE_ECC_KEYPAIR(\c curve) where \c curve designates a
|
|
* Montgomery curve), this function always draws a byte string whose
|
|
* length is determined by the curve, and sets the mandatory bits
|
|
* accordingly. That is:
|
|
*
|
|
* - #PSA_ECC_CURVE_CURVE25519: draw a 32-byte string
|
|
* and process it as specified in RFC 7748 §5.
|
|
* - #PSA_ECC_CURVE_CURVE448: draw a 56-byte string
|
|
* and process it as specified in RFC 7748 §5.
|
|
*
|
|
* - For key types for which the key is represented by a single sequence of
|
|
* \p bits bits with constraints as to which bit sequences are acceptable,
|
|
* this function draws a byte string of length (\p bits / 8) bytes rounded
|
|
* up to the nearest whole number of bytes. If the resulting byte string
|
|
* is acceptable, it becomes the key, otherwise the drawn bytes are discarded.
|
|
* This process is repeated until an acceptable byte string is drawn.
|
|
* The byte string drawn from the generator is interpreted as specified
|
|
* for the output produced by psa_export_key().
|
|
* The following key types defined in this specification follow this scheme:
|
|
*
|
|
* - #PSA_KEY_TYPE_DES.
|
|
* Force-set the parity bits, but discard forbidden weak keys.
|
|
* For 2-key and 3-key triple-DES, the three keys are generated
|
|
* successively (for example, for 3-key triple-DES,
|
|
* if the first 8 bytes specify a weak key and the next 8 bytes do not,
|
|
* discard the first 8 bytes, use the next 8 bytes as the first key,
|
|
* and continue reading output from the generator to derive the other
|
|
* two keys).
|
|
* - Finite-field Diffie-Hellman keys (#PSA_KEY_TYPE_DH_KEYPAIR),
|
|
* DSA keys (#PSA_KEY_TYPE_DSA_KEYPAIR), and
|
|
* ECC keys on a Weierstrass elliptic curve
|
|
* (#PSA_KEY_TYPE_ECC_KEYPAIR(\c curve) where \c curve designates a
|
|
* Weierstrass curve).
|
|
* For these key types, interpret the byte string as integer
|
|
* in big-endian order. Discard it if it is not in the range
|
|
* [0, *N* - 2] where *N* is the boundary of the private key domain
|
|
* (the prime *p* for Diffie-Hellman, the subprime *q* for DSA,
|
|
* or the order of the curve's base point for ECC).
|
|
* Add 1 to the resulting integer and use this as the private key *x*.
|
|
* This method allows compliance to NIST standards, specifically
|
|
* the methods titled "key-pair generation by testing candidates"
|
|
* in NIST SP 800-56A §5.6.1.1.4 for Diffie-Hellman,
|
|
* in FIPS 186-4 §B.1.2 for DSA, and
|
|
* in NIST SP 800-56A §5.6.1.2.2 or
|
|
* FIPS 186-4 §B.4.2 for elliptic curve keys.
|
|
*
|
|
* - For other key types, including #PSA_KEY_TYPE_RSA_KEYPAIR,
|
|
* the way in which the generator output is consumed is
|
|
* implementation-defined.
|
|
*
|
|
* In all cases, the data that is read is discarded from the generator.
|
|
* The generator's capacity is decreased by the number of bytes read.
|
|
*
|
|
* \param[in] attributes The attributes for the new key.
|
|
* \param[out] handle On success, a handle to the newly created key.
|
|
* \c 0 on failure.
|
|
* \param[in,out] generator The generator object to read from.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* If the key is persistent, the key material and the key's metadata
|
|
* have been saved to persistent storage.
|
|
* \retval #PSA_ERROR_ALREADY_EXISTS
|
|
* This is an attempt to create a persistent key, and there is
|
|
* already a persistent key with the given identifier.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_DATA
|
|
* There was not enough data to create the desired key.
|
|
* Note that in this case, no output is written to the output buffer.
|
|
* The generator's capacity is set to 0, thus subsequent calls to
|
|
* this function will not succeed, even with a smaller output buffer.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* The key type or key size is not supported, either by the
|
|
* implementation in general or in this particular slot.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_INSUFFICIENT_STORAGE
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_generator_import_key(const psa_key_attributes_t *attributes,
|
|
psa_key_handle_t *handle,
|
|
psa_crypto_generator_t *generator);
|
|
|
|
/** Abort a generator.
|
|
*
|
|
* Once a generator has been aborted, its capacity is zero.
|
|
* Aborting a generator frees all associated resources except for the
|
|
* \c generator structure itself.
|
|
*
|
|
* This function may be called at any time as long as the generator
|
|
* object has been initialized to #PSA_CRYPTO_GENERATOR_INIT, to
|
|
* psa_crypto_generator_init() or a zero value. In particular, it is valid
|
|
* to call psa_generator_abort() twice, or to call psa_generator_abort()
|
|
* on a generator that has not been set up.
|
|
*
|
|
* Once aborted, the generator object may be called.
|
|
*
|
|
* \param[in,out] generator The generator to abort.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_generator_abort(psa_crypto_generator_t *generator);
|
|
|
|
/** Use the maximum possible capacity for a generator.
|
|
*
|
|
* Use this value as the capacity argument when setting up a generator
|
|
* to indicate that the generator should have the maximum possible capacity.
|
|
* The value of the maximum possible capacity depends on the generator
|
|
* algorithm.
|
|
*/
|
|
#define PSA_GENERATOR_UNBRIDLED_CAPACITY ((size_t)(-1))
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup derivation Key derivation
|
|
* @{
|
|
*/
|
|
|
|
/** Set up a key derivation operation.
|
|
*
|
|
* A key derivation algorithm takes some inputs and uses them to create
|
|
* a byte generator which can be used to produce keys and other
|
|
* cryptographic material.
|
|
*
|
|
* To use a generator for key derivation:
|
|
* - Start with an initialized object of type #psa_crypto_generator_t.
|
|
* - Call psa_key_derivation_setup() to select the algorithm.
|
|
* - Provide the inputs for the key derivation by calling
|
|
* psa_key_derivation_input_bytes() or psa_key_derivation_input_key()
|
|
* as appropriate. Which inputs are needed, in what order, and whether
|
|
* they may be keys and if so of what type depends on the algorithm.
|
|
* - Optionally set the generator's maximum capacity with
|
|
* psa_set_generator_capacity(). You may do this before, in the middle of
|
|
* or after providing inputs. For some algorithms, this step is mandatory
|
|
* because the output depends on the maximum capacity.
|
|
* - Generate output with psa_generator_read() or
|
|
* psa_generator_import_key(). Successive calls to these functions
|
|
* use successive output bytes from the generator.
|
|
* - Clean up the generator object with psa_generator_abort().
|
|
*
|
|
* \param[in,out] generator The generator object to set up. It must
|
|
* have been initialized but not set up yet.
|
|
* \param alg The key derivation algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_KEY_DERIVATION(\p alg) is true).
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \c alg is not a key derivation algorithm.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \c alg is not supported or is not a key derivation algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
*/
|
|
psa_status_t psa_key_derivation_setup(psa_crypto_generator_t *generator,
|
|
psa_algorithm_t alg);
|
|
|
|
/** Provide an input for key derivation or key agreement.
|
|
*
|
|
* Which inputs are required and in what order depends on the algorithm.
|
|
* Refer to the documentation of each key derivation or key agreement
|
|
* algorithm for information.
|
|
*
|
|
* This function passes direct inputs. Some inputs must be passed as keys
|
|
* using psa_key_derivation_input_key() instead of this function. Refer to
|
|
* the documentation of individual step types for information.
|
|
*
|
|
* \param[in,out] generator The generator object to use. It must
|
|
* have been set up with
|
|
* psa_key_derivation_setup() and must not
|
|
* have produced any output yet.
|
|
* \param step Which step the input data is for.
|
|
* \param[in] data Input data to use.
|
|
* \param data_length Size of the \p data buffer in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \c step is not compatible with the generator's algorithm.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \c step does not allow direct inputs.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The value of \p step is not valid given the state of \p generator.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_key_derivation_input_bytes(psa_crypto_generator_t *generator,
|
|
psa_key_derivation_step_t step,
|
|
const uint8_t *data,
|
|
size_t data_length);
|
|
|
|
/** Provide an input for key derivation in the form of a key.
|
|
*
|
|
* Which inputs are required and in what order depends on the algorithm.
|
|
* Refer to the documentation of each key derivation or key agreement
|
|
* algorithm for information.
|
|
*
|
|
* This function passes key inputs. Some inputs must be passed as keys
|
|
* of the appropriate type using this function, while others must be
|
|
* passed as direct inputs using psa_key_derivation_input_bytes(). Refer to
|
|
* the documentation of individual step types for information.
|
|
*
|
|
* \param[in,out] generator The generator object to use. It must
|
|
* have been set up with
|
|
* psa_key_derivation_setup() and must not
|
|
* have produced any output yet.
|
|
* \param step Which step the input data is for.
|
|
* \param handle Handle to the key. It must have an
|
|
* appropriate type for \p step and must
|
|
* allow the usage #PSA_KEY_USAGE_DERIVE.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \c step is not compatible with the generator's algorithm.
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \c step does not allow key inputs.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The value of \p step is not valid given the state of \p generator.
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_key_derivation_input_key(psa_crypto_generator_t *generator,
|
|
psa_key_derivation_step_t step,
|
|
psa_key_handle_t handle);
|
|
|
|
/** Perform a key agreement and use the shared secret as input to a key
|
|
* derivation.
|
|
*
|
|
* A key agreement algorithm takes two inputs: a private key \p private_key
|
|
* a public key \p peer_key.
|
|
* The result of this function is passed as input to a key derivation.
|
|
* The output of this key derivation can be extracted by reading from the
|
|
* resulting generator to produce keys and other cryptographic material.
|
|
*
|
|
* \param[in,out] generator The generator object to use. It must
|
|
* have been set up with
|
|
* psa_key_derivation_setup() with a
|
|
* key agreement and derivation algorithm
|
|
* \c alg (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_KEY_AGREEMENT(\c alg) is true
|
|
* and #PSA_ALG_IS_RAW_KEY_AGREEMENT(\c alg)
|
|
* is false).
|
|
* The generator must be ready for an
|
|
* input of the type given by \p step.
|
|
* \param step Which step the input data is for.
|
|
* \param private_key Handle to the private key to use.
|
|
* \param[in] peer_key Public key of the peer. The peer key must be in the
|
|
* same format that psa_import_key() accepts for the
|
|
* public key type corresponding to the type of
|
|
* private_key. That is, this function performs the
|
|
* equivalent of
|
|
* #psa_import_key(`internal_public_key_handle`,
|
|
* #PSA_KEY_TYPE_PUBLIC_KEY_OF_KEYPAIR(`private_key_type`),
|
|
* `peer_key`, `peer_key_length`) where
|
|
* `private_key_type` is the type of `private_key`.
|
|
* For example, for EC keys, this means that peer_key
|
|
* is interpreted as a point on the curve that the
|
|
* private key is on. The standard formats for public
|
|
* keys are documented in the documentation of
|
|
* psa_export_public_key().
|
|
* \param peer_key_length Size of \p peer_key in bytes.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_DOES_NOT_EXIST
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \c private_key is not compatible with \c alg,
|
|
* or \p peer_key is not valid for \c alg or not compatible with
|
|
* \c private_key.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \c alg is not supported or is not a key derivation algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_key_agreement(psa_crypto_generator_t *generator,
|
|
psa_key_derivation_step_t step,
|
|
psa_key_handle_t private_key,
|
|
const uint8_t *peer_key,
|
|
size_t peer_key_length);
|
|
|
|
/** Perform a key agreement and use the shared secret as input to a key
|
|
* derivation.
|
|
*
|
|
* A key agreement algorithm takes two inputs: a private key \p private_key
|
|
* a public key \p peer_key.
|
|
*
|
|
* \warning The raw result of a key agreement algorithm such as finite-field
|
|
* Diffie-Hellman or elliptic curve Diffie-Hellman has biases and should
|
|
* not be used directly as key material. It should instead be passed as
|
|
* input to a key derivation algorithm. To chain a key agreement with
|
|
* a key derivation, use psa_key_agreement() and other functions from
|
|
* the key derivation and generator interface.
|
|
*
|
|
* \param alg The key agreement algorithm to compute
|
|
* (\c PSA_ALG_XXX value such that
|
|
* #PSA_ALG_IS_RAW_KEY_AGREEMENT(\p alg)
|
|
* is true).
|
|
* \param private_key Handle to the private key to use.
|
|
* \param[in] peer_key Public key of the peer. It must be
|
|
* in the same format that psa_import_key()
|
|
* accepts. The standard formats for public
|
|
* keys are documented in the documentation
|
|
* of psa_export_public_key().
|
|
* \param peer_key_length Size of \p peer_key in bytes.
|
|
* \param[out] output Buffer where the decrypted message is to
|
|
* be written.
|
|
* \param output_size Size of the \c output buffer in bytes.
|
|
* \param[out] output_length On success, the number of bytes
|
|
* that make up the returned output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* \retval #PSA_ERROR_INVALID_HANDLE
|
|
* \retval #PSA_ERROR_EMPTY_SLOT
|
|
* \retval #PSA_ERROR_NOT_PERMITTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p alg is not a key agreement algorithm
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \p private_key is not compatible with \p alg,
|
|
* or \p peer_key is not valid for \p alg or not compatible with
|
|
* \p private_key.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \p alg is not a supported key agreement algorithm.
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
*/
|
|
psa_status_t psa_key_agreement_raw_shared_secret(psa_algorithm_t alg,
|
|
psa_key_handle_t private_key,
|
|
const uint8_t *peer_key,
|
|
size_t peer_key_length,
|
|
uint8_t *output,
|
|
size_t output_size,
|
|
size_t *output_length);
|
|
|
|
/**@}*/
|
|
|
|
/** \defgroup random Random generation
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \brief Generate random bytes.
|
|
*
|
|
* \warning This function **can** fail! Callers MUST check the return status
|
|
* and MUST NOT use the content of the output buffer if the return
|
|
* status is not #PSA_SUCCESS.
|
|
*
|
|
* \note To generate a key, use psa_generate_key() instead.
|
|
*
|
|
* \param[out] output Output buffer for the generated data.
|
|
* \param output_size Number of bytes to generate and output.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_generate_random(uint8_t *output,
|
|
size_t output_size);
|
|
|
|
/** Extra parameters for RSA key generation.
|
|
*
|
|
* You may pass a pointer to a structure of this type as the \c extra
|
|
* parameter to psa_generate_key().
|
|
*/
|
|
typedef struct {
|
|
uint32_t e; /**< Public exponent value. Default: 65537. */
|
|
} psa_generate_key_extra_rsa;
|
|
|
|
/**
|
|
* \brief Generate a key or key pair.
|
|
*
|
|
* \param[in] attributes The attributes for the new key.
|
|
* \param[out] handle On success, a handle to the newly created key.
|
|
* \c 0 on failure.
|
|
* \param[in] extra Extra parameters for key generation. The
|
|
* interpretation of this parameter depends on
|
|
* the key type \c type. All types support \c NULL to
|
|
* use default parameters. Implementation that support
|
|
* the generation of vendor-specific key types
|
|
* that allow extra parameters shall document
|
|
* the format of these extra parameters and
|
|
* the default values. For standard parameters,
|
|
* the meaning of \p extra is as follows:
|
|
* - For a symmetric key type (a type such
|
|
* that #PSA_KEY_TYPE_IS_ASYMMETRIC(\c type) is
|
|
* false), \p extra must be \c NULL.
|
|
* - For an elliptic curve key type (a type
|
|
* such that #PSA_KEY_TYPE_IS_ECC(\c type) is
|
|
* false), \p extra must be \c NULL.
|
|
* - For an RSA key (\c type is
|
|
* #PSA_KEY_TYPE_RSA_KEYPAIR), \p extra is an
|
|
* optional #psa_generate_key_extra_rsa structure
|
|
* specifying the public exponent. The
|
|
* default public exponent used when \p extra
|
|
* is \c NULL is 65537.
|
|
* - For an DSA key (\c type is
|
|
* #PSA_KEY_TYPE_DSA_KEYPAIR), \p extra is an
|
|
* optional structure specifying the key domain
|
|
* parameters. The key domain parameters can also be
|
|
* provided by psa_set_key_domain_parameters(),
|
|
* which documents the format of the structure.
|
|
* - For a DH key (\c type is
|
|
* #PSA_KEY_TYPE_DH_KEYPAIR), the \p extra is an
|
|
* optional structure specifying the key domain
|
|
* parameters. The key domain parameters can also be
|
|
* provided by psa_set_key_domain_parameters(),
|
|
* which documents the format of the structure.
|
|
* \param extra_size Size of the buffer that \p extra
|
|
* points to, in bytes. Note that if \p extra is
|
|
* \c NULL then \p extra_size must be zero.
|
|
*
|
|
* \retval #PSA_SUCCESS
|
|
* Success.
|
|
* If the key is persistent, the key material and the key's metadata
|
|
* have been saved to persistent storage.
|
|
* \retval #PSA_ERROR_ALREADY_EXISTS
|
|
* This is an attempt to create a persistent key, and there is
|
|
* already a persistent key with the given identifier.
|
|
* \retval #PSA_ERROR_NOT_SUPPORTED
|
|
* \retval #PSA_ERROR_INVALID_ARGUMENT
|
|
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
|
|
* \retval #PSA_ERROR_INSUFFICIENT_ENTROPY
|
|
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
|
|
* \retval #PSA_ERROR_HARDWARE_FAILURE
|
|
* \retval #PSA_ERROR_TAMPERING_DETECTED
|
|
* \retval #PSA_ERROR_BAD_STATE
|
|
* The library has not been previously initialized by psa_crypto_init().
|
|
* It is implementation-dependent whether a failure to initialize
|
|
* results in this error code.
|
|
*/
|
|
psa_status_t psa_generate_key(const psa_key_attributes_t *attributes,
|
|
psa_key_handle_t *handle,
|
|
const void *extra,
|
|
size_t extra_size);
|
|
|
|
/**@}*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/* The file "crypto_sizes.h" contains definitions for size calculation
|
|
* macros whose definitions are implementation-specific. */
|
|
#include "crypto_sizes.h"
|
|
|
|
/* The file "crypto_struct.h" contains definitions for
|
|
* implementation-specific structs that are declared above. */
|
|
#include "crypto_struct.h"
|
|
|
|
/* The file "crypto_extra.h" contains vendor-specific definitions. This
|
|
* can include vendor-defined algorithms, extra functions, etc. */
|
|
#include "crypto_extra.h"
|
|
|
|
#endif /* PSA_CRYPTO_H */
|