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Further reduce macro expansion

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Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
This commit is contained in:
Bence Szépkúti 2021-04-08 12:05:18 +02:00
parent 598e92991a
commit 7e31009bdb
2 changed files with 20 additions and 9 deletions
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15
include/psa/crypto_sizes.h
View file

@ -140,7 +140,7 @@
*/
#define PSA_AEAD_TAG_LENGTH(key_type, key_bits, alg) \
(PSA_AEAD_NONCE_LENGTH(key_type, alg) ? \
((alg) & PSA_ALG_AEAD_TAG_LENGTH_MASK) >> PSA_AEAD_TAG_LENGTH_OFFSET : \
PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
((void) (key_bits), 0))
/** The maximum tag size for all supported AEAD algorithms, in bytes.
@ -271,7 +271,7 @@
*/
#define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext_length) \
(PSA_AEAD_NONCE_LENGTH(key_type, alg) ? \
(plaintext_length) + PSA_AEAD_TAG_LENGTH(key_type, 0, alg) : \
(plaintext_length) + PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
0)
/** A sufficient output buffer size for psa_aead_encrypt(), for any of the
@ -324,7 +324,7 @@
*/
#define PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext_length) \
(PSA_AEAD_NONCE_LENGTH(key_type, alg) ? \
(ciphertext_length) - PSA_AEAD_TAG_LENGTH(key_type, 0, alg) : \
(ciphertext_length) - PSA_ALG_AEAD_GET_TAG_LENGTH(alg) : \
0)
/** A sufficient output buffer size for psa_aead_decrypt(), for any of the
@ -375,14 +375,11 @@
*/
#define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 ? \
PSA_ALG_AEAD_WITH_SHORTENED_TAG(alg, 0) == \
PSA_ALG_AEAD_WITH_SHORTENED_TAG(PSA_ALG_CCM, 0) ? 13 : \
PSA_ALG_AEAD_WITH_SHORTENED_TAG(alg, 0) == \
PSA_ALG_AEAD_WITH_SHORTENED_TAG(PSA_ALG_GCM, 0) ? 12 : \
PSA_ALG_AEAD_IS_BASE_EQUAL(alg, PSA_ALG_CCM) ? 13 : \
PSA_ALG_AEAD_IS_BASE_EQUAL(alg, PSA_ALG_GCM) ? 12 : \
0 : \
(key_type) == PSA_KEY_TYPE_CHACHA20 && \
PSA_ALG_AEAD_WITH_SHORTENED_TAG(alg, 0) == \
PSA_ALG_AEAD_WITH_SHORTENED_TAG(PSA_ALG_CHACHA20_POLY1305, 0) ? 12 : \
PSA_ALG_AEAD_IS_BASE_EQUAL(alg, PSA_ALG_CHACHA20_POLY1305) ? 12 : \
0)
/** The maximum default nonce size among all supported pairs of key types and

14
include/psa/crypto_values.h
View file

@ -1175,6 +1175,20 @@
* encoded in #PSA_ALG_AEAD_TAG_LENGTH_MASK. */
#define PSA_ALG_AEAD_AT_LEAST_THIS_LENGTH_FLAG ((psa_algorithm_t)0x00008000)
/** Macro to test whether two AEAD algorithms correspond to the same base algorithm.
*
* \param aead_alg_1 An AEAD algorithm identifier.
* \param aead_alg_2 An AEAD algorithm identifier.
*
* \return 1 if the base both arguments correspond to the same base
* algorithm, 0 otherwise.
* Unspecified if \p aead_alg_1 or \p aead_alg_2 are not
* supported AEAD algorithms.
*/
#define PSA_ALG_AEAD_IS_BASE_EQUAL(aead_alg_1, aead_alg_2) \
(!(((aead_alg_1) ^ (aead_alg_2)) & \
~(PSA_ALG_AEAD_TAG_LENGTH_MASK | PSA_ALG_AEAD_AT_LEAST_THIS_LENGTH_FLAG)))
/** Macro to build a shortened AEAD algorithm.
*
* A shortened AEAD algorithm is similar to the corresponding AEAD