Commit Graph

31 Commits

Author SHA1 Message Date
Gilles Peskine
30a9e41076 Declare multipart AEAD functions
Declare and document multipart AEAD functions.

This commit does not contain any implementation or tests.
2019-01-14 18:36:12 +01:00
Jaeden Amero
5bae227da0 psa: Add initializers for cipher operation objects
Add new initializers for cipher operation objects and use them in our
tests and library code. Prefer using the macro initializers due to their
straightforwardness.
2019-01-08 14:28:04 +00:00
Jaeden Amero
5a5dc77696 psa: Enable easier initialization of cipher operations
The struct psa_cipher_operation_s is built with a
mbedtls_cipher_context_t. The shape of mbedtls_cipher_context_t and an
initializer that works with Clang 5.0 and its
-Wmissing-field-initializers varies based on the configuration of the
library. Instead of making multiple initializers based on a maze of
ifdefs for all combinations of MBEDTLS_CIPHER_MODE_WITH_PADDING,
MBEDTLS_CMAC_C, and MBEDTLS_USE_PSA_CRYPTO, add a dummy variable to
psa_cipher_operation_s's union that encloses mbedtls_cipher_context_t.
This allows us to initialize the dummy with a Clang-approved initializer
and have it properly initialize the entire object.
2019-01-08 14:28:04 +00:00
Jaeden Amero
769ce27f12 psa: Add initializers for MAC operation objects
Add new initializers for MAC operation objects and use them in our tests
and library code. Prefer using the macro initializers due to their
straightforwardness.
2019-01-08 14:28:04 +00:00
Jaeden Amero
6a25b41ac3 psa: Add initializers for hash operation objects
Add new initializers for hash operation objects and use them in our
tests and library code. Prefer using the macro initializers due to their
straightforwardness.
2019-01-08 14:28:04 +00:00
Jaeden Amero
70261c513a psa: Add initializers for key policies
Add new initializers for key policies and use them in our docs, example
programs, tests, and library code. Prefer using the macro initializers
due to their straightforwardness.
2019-01-08 14:28:04 +00:00
Gilles Peskine
a05219c70b Add some missing compilation guards
Add missing checks for defined(MBEDTLS_MD_C) around types and
functions that require it (HMAC, HKDF, TLS12_PRF).

Add missing checks for defined(MBEDTLS_ECDSA_DETERMINISTIC) around
code that calls mbedtls_ecdsa_sign_det().

Add missing checks for defined(MBEDTLS_ECDH_C) around ECDH-specific
functions.
2018-11-16 16:09:24 +01:00
Hanno Becker
580fba1431 Dynamically allocate A(i) + seed buffer for TLS-1.2 PRF 2018-11-16 11:24:59 +00:00
Hanno Becker
c8a41d71cb Add implementation of TLS-1.2 PRF 2018-11-16 11:24:55 +00:00
Darryl Green
80bed236de Change psa_structs to use unsigned ints
These structs are using bitfields of length one, which can only represent 0 and -1 for signed ints.
Changing these to unsigned int lets them represent 0 and 1, which is what we want.
2018-09-14 10:02:28 +01:00
Gilles Peskine
bef7f14f8e Implement HKDF 2018-09-12 16:44:05 +03:00
Gilles Peskine
eab56e4159 Add generator API
Add an API for byte generators: psa_crypto_generator_t,
PSA_CRYPTO_GENERATOR_INIT, psa_crypto_generator_init,
psa_get_generator_capacity, psa_generator_read,
psa_generator_import_key, psa_generator_abort.

This commit does not yet implement any generator algorithm, it only
provides the framework. This code may not compile with -Wunused.
2018-09-12 16:41:12 +03:00
Gilles Peskine
89167cb597 Split psa_mac_setup -> psa_mac_{sign,verify}_setup
Make function names for multipart operations more consistent (MAC
setup edition).

Split psa_mac_setup into two functions psa_mac_sign_setup and
psa_mac_verify_setup. These functions behave identically except that
they require different usage flags on the key. The goal of the split
is to enforce the key policy during setup rather than at the end of
the operation (which was a bit of a hack).

In psa_mac_sign_finish and psa_mac_verify_finish, if the operation is
of the wrong type, abort the operation before returning BAD_STATE.
2018-09-12 16:41:11 +03:00
Gilles Peskine
07c91f5df3 Add notes about the purpose and usage of auxiliary header files 2018-09-12 16:41:11 +03:00
Gilles Peskine
0cad07c2fb New header crypto_sizes.h
This header will contain macros that calculate buffer sizes, whose
semantics are standardized but whose definitions are
implementation-specific because they depend on the available algorithms
and on some permitted buffer size tolerances.

Move size macros from crypto_struct.h to crypto_sizes.h, because these
definitions need to be available both in the frontend and in the
backend, whereas structures have different contents.
2018-09-12 16:41:11 +03:00
Gilles Peskine
b3e6e5deeb Rename hash max sizes for consistency
Use "hash" throughout the library, not "md" as in Mbed TLS.
2018-09-12 16:19:04 +03:00
Gilles Peskine
2d2778650b Normalize whitespace
Normalize whitespace to Mbed TLS standards. There are only whitespace
changes in this commit.
2018-09-12 16:15:52 +03:00
Nir Sonnenschein
5ca6547b77 Renamed hmac_ctx to opad and removed null check.
this array is now part of the struct and not dynamically allocated
so it can't be null.
2018-09-12 16:13:49 +03:00
Nir Sonnenschein
9e2ffe83ac change type of hash block to uint8_t 2018-09-12 16:13:49 +03:00
Nir Sonnenschein
35dfbf4601 change hmac context to use statically allocated memory
1. removed dynamic allocation of stack context
2. moved ipad to stack
3. added defines for maximal sizes
2018-09-12 16:13:49 +03:00
Nir Sonnenschein
dcd636a73f Commit changes to hmac to not use MD abstraction
this PR is part of efforts to use "lower level" mbedTLS APIs vs "higher level" abstract APIs.
2018-09-12 16:13:49 +03:00
Gilles Peskine
84861a95ca Merge remote-tracking branch 'psa/psa-wrapper-apis-aead' into feature-psa 2018-09-05 12:41:52 +03:00
mohammad1603
39ee871d3f Change AEAD APIs to integrated AEAD APIs.
Change AEAD APIs to integrated AEAD APIs, this will allow t support CCM and
GCM algorithms.
2018-09-05 12:38:17 +03:00
Moran Peker
ad9d82cc0e add iv_required field to psa_cipher_operation_s and fix relevant functions 2018-09-05 12:14:28 +03:00
mohammad1603
503973bdf3 initial implementation for PSA symmetric APIs - missing tests and documentations 2018-09-05 12:13:23 +03:00
mohammad1603
6df908f234 Add static internal MAC finish function
add new psa_mac_finish_internal() to be called by psa_mac_finish() and
psa_mac_verify() in order to be able to check key usage separatly.
2018-09-05 11:53:26 +03:00
Gilles Peskine
058e0b9963 Avoid empty unions
When no algorithms are present in a category (e.g. no AEAD algorithm),
the union in the corresponding operation structure was empty, which is
not valid C. Add a dummy field to avoid this.
2018-09-05 11:53:26 +03:00
Gilles Peskine
7698bcf338 Basic interface for key policies
Get/set the policy of a key slot.

Opaque structure for key policies and field access functions.
2018-09-05 11:53:25 +03:00
Gilles Peskine
3b555710e2 Prototypes for AEAD functions
This is still tentative.
2018-09-05 11:53:25 +03:00
Gilles Peskine
428dc5aef1 Prototypes for symmetric cipher functions 2018-09-05 11:53:25 +03:00
Gilles Peskine
9ef733faa0 Implement hash functions
New header file crypto_struct.h. The main file crypto.sh declares
structures which are implementation-defined. These structures must be
defined in crypto_struct.h, which is included at the end so that the
structures can use types defined in crypto.h.

Implement psa_hash_start, psa_hash_update and psa_hash_final. This
should work for all hash algorithms supported by Mbed TLS, but has
only been smoke-tested for SHA-256, and only in the nominal case.
2018-09-05 11:53:25 +03:00