327 lines
11 KiB
C
327 lines
11 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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#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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/** \defgroup platform Implementation-specific definitions
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* @{
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*/
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/** \brief Key slot number.
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*
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* This type represents key slots. It must be an unsigned integral
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* type.* The choice of type is implementation-dependent.
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* 0 is not a valid key slot number. The meaning of other values is
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* implementation dependent.
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*
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* At any given point in time, each key slot either contains a
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* cryptographic object, or is empty. Key slots are persistent:
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* once set, the cryptographic object remains in the key slot until
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* explicitly destroyed.
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*/
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typedef _unsigned_integral_type_ psa_key_slot_t;
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/**@}*/
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \defgroup basic Basic definitions
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* @{
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*/
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/**
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* \brief Function return status.
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*
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* Zero indicates success, anything else indicates an error.
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*/
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typedef enum {
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/** The action was completed successfully. */
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PSA_SUCCESS = 0,
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/** The requested operation or a parameter is not supported
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by this implementation. */
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PSA_ERROR_NOT_SUPPORTED,
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/** The requested action is denied by a policy. */
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PSA_ERROR_NOT_PERMITTED,
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/** An output buffer is too small. */
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PSA_ERROR_BUFFER_TOO_SMALL,
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/** A slot is occupied, but must be empty to carry out the
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requested action. */
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PSA_ERROR_OCCUPIED_SLOT,
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/** A slot is empty, but must be occupied to carry out the
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requested action. */
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PSA_ERROR_EMPTY_SLOT,
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/** The requested action cannot be performed in the current state. */
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PSA_ERROR_BAD_STATE,
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/** The parameters passed to the function are invalid. */
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PSA_ERROR_INVALID_ARGUMENT,
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/** There is not enough runtime memory. */
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PSA_ERROR_INSUFFICIENT_MEMORY,
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/** There is not enough persistent storage. */
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PSA_ERROR_INSUFFICIENT_STORAGE,
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/** There was a communication failure inside the implementation. */
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PSA_ERROR_COMMUNICATION_FAILURE,
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/** A hardware failure was detected. */
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PSA_ERROR_HARDWARE_FAILURE,
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/** A tampering attempt was detected. */
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PSA_ERROR_TAMPERING_DETECTED,
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/** There is not enough entropy to generate random data needed
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for the requested action. */
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PSA_ERROR_INSUFFICIENT_ENTROPY,
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/** The signature or MAC is incorrect. */
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PSA_ERROR_INVALID_SIGNATURE,
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/** An error occurred that does not correspond to any defined
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failure cause. */
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PSA_ERROR_UNKNOWN_ERROR,
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} psa_status_t;
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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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* \return * \c PSA_SUCCESS: success.
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* * \c PSA_ERROR_INSUFFICIENT_MEMORY
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* * \c PSA_ERROR_COMMUNICATION_FAILURE
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* * \c PSA_ERROR_HARDWARE_FAILURE
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* * \c PSA_ERROR_TAMPERING_DETECTED
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* * \c PSA_ERROR_INSUFFICIENT_ENTROPY
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*/
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psa_status_t psa_crypto_init(void);
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#define BITS_TO_BYTES(bits) (((bits) + 7) / 8)
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#define BYTES_TO_BITS(bytes) ((bytes) * 8)
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/**@}*/
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/** \defgroup crypto_types Key and algorithm types
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* @{
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*/
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typedef uint32_t psa_key_type_t;
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#define PSA_KEY_TYPE_NONE 0x00000000
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#define PSA_KEY_TYPE_RAW_DATA 0x00000001
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#define PSA_KEY_TYPE_RSA_PUBLIC_KEY 0x40000001
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#define PSA_KEY_TYPE_RSA_KEYPAIR 0x60000001
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#define PSA_KEY_TYPE_ECC_BASE 0x40010000
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#define PSA_KEY_TYPE_VENDOR_FLAG 0x80000000
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#define PSA_KEY_TYPE_ASYMMETRIC_FLAG 0x40000000
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#define PSA_KEY_TYPE_ASYMMETRIC_MASK 0x60000000
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#define PSA_KEY_TYPE_ASYMMETRIC_MASK_PUBLIC 0x40000000
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#define PSA_KEY_TYPE_ASYMMETRIC_MASK_KEYPAIR 0x60000000
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#define PSA_KEY_TYPE_ASYMMETRIC_TEST_MASK 0x5fff0000
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#define PSA_KEY_TYPE_RSA_TEST_VALUE 0x40000000
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#define PSA_KEY_TYPE_ECC_TEST_VALUE 0x40010000
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#define PSA_KEY_TYPE_IS_VENDOR(type) \
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(((type) & PSA_KEY_TYPE_VENDOR_FLAG) != 0)
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#define PSA_KEY_TYPE_IS_ASYMMETRIC(type) \
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(((type) & PSA_KEY_TYPE_ASYMMETRIC_FLAG) != 0)
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#define PSA_KEY_TYPE_IS_PUBLIC_KEY(type) \
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(((type) & PSA_KEY_TYPE_ASYMMETRIC_MASK) == PSA_KEY_TYPE_ASYMMETRIC_MASK_PUBLIC)
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#define PSA_KEY_TYPE_IS_KEYPAIR(type) \
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(((type) & PSA_KEY_TYPE_ASYMMETRIC_MASK) == PSA_KEY_TYPE_ASYMMETRIC_MASK_KEYPAIR)
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#define PSA_KEY_TYPE_IS_RSA(type) \
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(((type) & PSA_KEY_TYPE_ASYMMETRIC_TEST_MASK) == PSA_KEY_TYPE_RSA_TEST_VALUE)
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#define PSA_KEY_TYPE_IS_ECC(type) \
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(((type) & PSA_KEY_TYPE_ASYMMETRIC_TEST_MASK) == PSA_KEY_TYPE_ECC_TEST_VALUE)
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typedef uint32_t psa_algorithm_t;
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#define PSA_ALG_HASH_BITS 0x01000000
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#define PSA_ALG_RSA_HASH_MASK 0x000000ff
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#define PSA_ALG_MD2 0x01000001
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#define PSA_ALG_MD4 0x01000002
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#define PSA_ALG_MD5 0x01000003
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#define PSA_ALG_SHA_256_128 0x01000004
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#define PSA_ALG_RIPEMD160 0x01000005
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#define PSA_ALG_SHA_1 0x01000006
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#define PSA_ALG_SHA_256_160 0x01000007
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#define PSA_ALG_SHA_224 0x01000008
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#define PSA_ALG_SHA_256 0x01000009
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#define PSA_ALG_SHA_384 0x0100000a
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#define PSA_ALG_SHA_512 0x0100000b
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#define PSA_ALG_SHA_512_224 0x0100000c
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#define PSA_ALG_SHA_512_256 0x0100000d
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#define PSA_ALG_SHA3_224 0x01000010
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#define PSA_ALG_SHA3_256 0x01000011
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#define PSA_ALG_SHA3_384 0x01000012
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#define PSA_ALG_SHA3_512 0x01000013
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#define PSA_ALG_RSA_PKCS1V15_RAW 0x40000100
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#define PSA_ALG_RSA_PSS_MGF1 0x40000200
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#define PSA_ALG_RSA_OAEP 0x40000300
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#define PSA_ALG_RSA_PKCS1V15(hash_alg) \
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(PSA_ALG_RSA_PKCS1V15_RAW | ((hash_alg) & PSA_ALG_RSA_HASH_MASK))
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#define PSA_ALG_IS_RSA_PKCS1V15(alg) \
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(((alg) & 0x7fffff00) == PSA_ALG_RSA_PKCS1V15_RAW)
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#define PSA_ALG_RSA_GET_HASH(alg) \
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(((alg) & PSA_ALG_RSA_HASH_MASK) | PSA_ALG_HASH_BITS)
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#define PSA_ALG_VENDOR_FLAG 0x80000000
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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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* \brief Import a key in binary format.
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*
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* This function supports any output from psa_export_key().
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*
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* \return * \c PSA_SUCCESS: success.
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* * \c PSA_ERROR_NOT_SUPPORTED
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* * \c PSA_ERROR_INVALID_ARGUMENT
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* * \c PSA_ERROR_INSUFFICIENT_MEMORY
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* * \c PSA_ERROR_COMMUNICATION_FAILURE
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* * \c PSA_ERROR_HARDWARE_FAILURE
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* * \c PSA_ERROR_TAMPERING_DETECTED
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*/
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psa_status_t psa_import_key(psa_key_slot_t key,
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psa_key_type_t type,
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const uint8_t *data,
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size_t data_length);
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/**
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* \brief Destroy a key.
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*
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* \return * \c PSA_SUCCESS: success.
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* * \c PSA_ERROR_EMPTY_SLOT
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* * \c PSA_ERROR_COMMUNICATION_FAILURE
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* * \c PSA_ERROR_HARDWARE_FAILURE
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* * \c PSA_ERROR_TAMPERING_DETECTED
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*/
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psa_status_t psa_destroy_key(psa_key_slot_t key);
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/**
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* \brief Get basic metadata about a key.
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*
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* \return * \c PSA_SUCCESS: success.
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* * \c PSA_ERROR_EMPTY_SLOT
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* * \c PSA_ERROR_COMMUNICATION_FAILURE
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* * \c PSA_ERROR_HARDWARE_FAILURE
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* * \c PSA_ERROR_TAMPERING_DETECTED
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*/
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psa_status_t psa_get_key_information(psa_key_slot_t key,
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psa_key_type_t *type,
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size_t *bits);
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/**
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* \brief Export a key in binary format.
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*
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* The output of this function can be passed to psa_import_key() to
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* create an equivalent object.
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*
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* If a key is created with psa_import_key() and then exported with
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* this function, it is not guaranteed that the resulting data is
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* identical: the implementation may choose a different representation
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* of the same key.
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*
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* \return * \c PSA_SUCCESS: success.
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* * \c PSA_ERROR_EMPTY_SLOT
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* * \c PSA_ERROR_COMMUNICATION_FAILURE
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* * \c PSA_ERROR_HARDWARE_FAILURE
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* * \c PSA_ERROR_TAMPERING_DETECTED
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*/
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psa_status_t psa_export_key(psa_key_slot_t key,
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uint8_t *data,
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size_t data_size,
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size_t *data_length);
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/**@}*/
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/** \defgroup asymmetric Asymmetric cryptography
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* @{
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*/
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/**
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* \brief Maximum ECDSA signature size for a given curve bit size
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*
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* \param curve_bits Curve size in bits
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* \return Maximum signature size in bytes
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*
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* \note This macro returns a compile-time constant if its argument is one.
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*
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* \warning This macro may evaluate its argument multiple times.
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*/
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/*
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* RFC 4492 page 20:
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*
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* Ecdsa-Sig-Value ::= SEQUENCE {
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* r INTEGER,
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* s INTEGER
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* }
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*
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* Size is at most
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* 1 (tag) + 1 (len) + 1 (initial 0) + curve_bytes for each of r and s,
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* twice that + 1 (tag) + 2 (len) for the sequence
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* (assuming curve_bytes is less than 126 for r and s,
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* and less than 124 (total len <= 255) for the sequence)
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*/
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#define PSA_ECDSA_SIGNATURE_SIZE(curve_bits) \
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( /*T,L of SEQUENCE*/ ((curve_bits) >= 61 * 8 ? 3 : 2) + \
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/*T,L of r,s*/ 2 * (((curve_bits) >= 127 * 8 ? 3 : 2) + \
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/*V of r,s*/ ((curve_bits) + 8) / 8))
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#define PSA_ASYMMETRIC_SIGN_OUTPUT_SIZE(key_type, key_bits, alg) \
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(PSA_KEY_TYPE_IS_RSA(key_type) ? ((void)alg, BITS_TO_BYTES(key_bits)) : \
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PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_ECDSA_SIGNATURE_SIZE(key_bits) : \
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0)
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/**
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* \brief Sign a hash or short message with a private key.
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*
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*/
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psa_status_t psa_asymmetric_sign(psa_key_slot_t key,
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psa_algorithm_t alg,
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const uint8_t *hash,
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size_t hash_length,
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const uint8_t *salt,
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size_t salt_length,
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uint8_t *signature,
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size_t signature_size,
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size_t *signature_length);
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/**
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* \brief Verify the signature a hash or short message using a public key.
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*
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*/
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psa_status_t psa_asymmetric_verify(psa_key_slot_t key,
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psa_algorithm_t alg,
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const uint8_t *hash,
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size_t hash_length,
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const uint8_t *salt,
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size_t salt_length,
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uint8_t *signature,
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size_t signature_size);
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/**@}*/
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#ifdef __cplusplus
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}
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#endif
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#include "crypto_extra.h"
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#endif /* PSA_CRYPTO_H */
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