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PSA PAKE: add output size macros

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Signed-off-by: Janos Follath <janos.follath@arm.com>
This commit is contained in:
Janos Follath 2021-04-08 13:53:12 +01:00
parent 9c6b147d98
commit b378d57840
1 changed files with 50 additions and 0 deletions
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50
include/psa/crypto_sizes.h
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@ -1132,4 +1132,54 @@
#define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE \
(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
/** A sufficient output buffer size for psa_pake_get_key_share().
*
* If the size of the ciphertext buffer is at least this large, it is
* guaranteed that psa_pake_get_key_share() will not fail due to an
* insufficient ciphertext buffer size. The actual size of the output might be
* smaller in any given call.
*
* See also #PSA_PAKE_OUTPUT_MAX_SIZE
*
* \param alg A PAKE algorithm (PSA_ALG_XXX value such that
* #PSA_ALG_IS_PAKE(\p alg) is true).
* \param cipher_suite A cipher suite that is compatible with algorithm \p alg.
* \return A sufficient key share buffer size for the specified
* cipher suite and algorithm. If the cipher suite or PAKE
* algorithm is not recognized, or the parameters are
* incompatible, return 0.
*/
#define PSA_PAKE_KEY_SHARE_SIZE(alg, cipher_suite) \
(PSA_PAKE_OUTPUT_SIZE(alg, cipher_suite, PSA_PAKE_DATA_KEY_SHARE)
/** A sufficient output buffer size for psa_pake_output().
*
* If the size of the ciphertext buffer is at least this large, it is
* guaranteed that psa_pake_output() will not fail due to an
* insufficient ciphertext buffer size. The actual size of the output might be
* smaller in any given call.
*
* See also #PSA_PAKE_OUTPUT_MAX_SIZE
*
* \param alg A PAKE algorithm (PSA_ALG_XXX value such that
* #PSA_ALG_IS_PAKE(\p alg) is true).
* \param cipher_suite A cipher suite that is compatible with algorithm \p alg.
* \param output An output type used with algorithm \p alg.
* \return A sufficient output buffer size for the specified
* output, cipher suite and algorithm. If the cipher suite,
* the output type or PAKE algorithm is not recognized, or
* the parameters are incompatible, return 0.
*/
#define PSA_PAKE_OUTPUT_SIZE(alg, cipher_suite, output)
/** Output buffer size for psa_pake_output() and psa_pake_get_key_share(),
* for any of the supported cipher suites and PAKE algorithms.
*
* This macro must expand to a compile-time constant integer.
*
* See also #PSA_PAKE_KEY_SHARE_SIZE(\p alg, \p cipher_suite) and
* #PSA_PAKE_OUTPUT_SIZE(\p alg, \p cipher_suite, \p output).
*/
#define PSA_PAKE_OUTPUT_MAX_SIZE
#endif /* PSA_CRYPTO_SIZES_H */