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Move AEAD macros next to each other

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Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
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gabor-mezei-arm 2020-12-17 14:09:38 +01:00
parent 7f3d10de02
commit a200ee6098
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GPG key ID: 106F5A41ECC305BD
1 changed files with 48 additions and 43 deletions
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91
include/psa/crypto_sizes.h
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@ -283,6 +283,54 @@
(ciphertext_length) - PSA_AEAD_TAG_LENGTH(alg) : \ (ciphertext_length) - PSA_AEAD_TAG_LENGTH(alg) : \
0) 0)
/** The default nonce size for an AEAD algorithm, in bytes.
*
* This macro can be used to allocate a buffer of sufficient size to
* store the nonce output from #psa_aead_generate_nonce().
*
* See also #PSA_AEAD_NONCE_MAX_SIZE.
*
* \note This is not the maximum size of nonce supported as input to
* #psa_aead_set_nonce(), #psa_aead_encrypt() or #psa_aead_decrypt(),
* just the default size that is generated by #psa_aead_generate_nonce().
*
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* \param key_type A symmetric key type that is compatible with
* algorithm \p alg.
*
* \param alg An AEAD algorithm (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_AEAD(\p alg) is true).
*
* \return The default nonce size for the specified key type and algorithm.
* If the key type or AEAD algorithm is not recognized,
* or the parameters are incompatible, return 0.
* An implementation can return either 0 or a correct size for a key
* type and AEAD algorithm that it recognizes, but does not support.
*/
#define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 && \
(PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH(alg) == PSA_ALG_CCM || \
PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH(alg) == PSA_ALG_GCM) ? 12 : \
(key_type) == PSA_KEY_TYPE_CHACHA20 && \
PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH(alg) == PSA_ALG_CHACHA20_POLY1305 ? 12 : \
0)
/** The maximum default nonce size among all supported pairs of key types and
* AEAD algorithms, in bytes.
*
* This is equal to or greater than any value that #PSA_AEAD_NONCE_LENGTH()
* may return.
*
* \note This is not the maximum size of nonce supported as input to
* #psa_aead_set_nonce(), #psa_aead_encrypt() or #psa_aead_decrypt(),
* just the largest size that may be generated by
* #psa_aead_generate_nonce().
*/
#define PSA_AEAD_NONCE_MAX_SIZE 12
/** A sufficient output buffer size for psa_aead_update(). /** A sufficient output buffer size for psa_aead_update().
* *
* If the size of the output buffer is at least this large, it is * If the size of the output buffer is at least this large, it is
@ -643,49 +691,6 @@
PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \ PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
0) 0)
/** The default nonce size for an AEAD algorithm, in bytes.
*
* This macro can be used to allocate a buffer of sufficient size to
* store the nonce output from #psa_aead_generate_nonce().
*
* See also #PSA_AEAD_NONCE_MAX_SIZE.
*
* \note This is not the maximum size of nonce supported as input to #psa_aead_set_nonce(),
* #psa_aead_encrypt() or #psa_aead_decrypt(), just the default size that is generated by
* #psa_aead_generate_nonce().
*
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* \param key_type A symmetric key type that is compatible with algorithm \p alg.
*
* \param alg An AEAD algorithm (\c PSA_ALG_XXX value such that #PSA_ALG_IS_AEAD(\p alg) is true).
*
* \return The default nonce size for the specified key type and algorithm.
* If the key type or AEAD algorithm is not recognized,
* or the parameters are incompatible, return 0.
* An implementation can return either 0 or a correct size for a key type
* and AEAD algorithm that it recognizes, but does not support.
*/
#define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 && \
(PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CCM || \
PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_GCM) ? 12 : \
(key_type) == PSA_KEY_TYPE_CHACHA20 && \
PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CHACHA20_POLY1305 ? 12 : \
0)
/** The maximum default nonce size among all supported pairs of key types and AEAD algorithms, in bytes.
*
* This is equal to or greater than any value that #PSA_AEAD_NONCE_LENGTH() may return.
*
* \note This is not the maximum size of nonce supported as input to #psa_aead_set_nonce(),
* #psa_aead_encrypt() or #psa_aead_decrypt(), just the largest size that may be generated by
* #psa_aead_generate_nonce().
*/
#define PSA_AEAD_NONCE_MAX_SIZE 12
/** The default IV size for a cipher algorithm, in bytes. /** The default IV size for a cipher algorithm, in bytes.
* *
* The IV that is generated as part of a call to #psa_cipher_encrypt() is always * The IV that is generated as part of a call to #psa_cipher_encrypt() is always