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Add support for non-default-tag-size AEAD (CCM and GCM)

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This commit is contained in:
Gilles Peskine
2018-08-17 19:47:52 +02:00
parent 7da96b0d91
commit 23cc2ff9a8
4 changed files with 66 additions and 23 deletions
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12
include/psa/crypto_sizes.h
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@ -188,9 +188,9 @@
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/
#define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(alg, plaintext_length) \
(PSA_AEAD_TAG_SIZE(alg) != 0 ? \
(plaintext_length) + PSA_AEAD_TAG_SIZE(alg) : \
#define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(alg, plaintext_length) \
(PSA_AEAD_TAG_LENGTH(alg) != 0 ? \
(plaintext_length) + PSA_AEAD_TAG_LENGTH(alg) : \
0)
/** The maximum size of the output of psa_aead_decrypt(), in bytes.
@ -212,9 +212,9 @@
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/
#define PSA_AEAD_DECRYPT_OUTPUT_SIZE(alg, ciphertext_length) \
(PSA_AEAD_TAG_SIZE(alg) != 0 ? \
(plaintext_length) - PSA_AEAD_TAG_SIZE(alg) : \
#define PSA_AEAD_DECRYPT_OUTPUT_SIZE(alg, ciphertext_length) \
(PSA_AEAD_TAG_LENGTH(alg) != 0 ? \
(plaintext_length) - PSA_AEAD_TAG_LENGTH(alg) : \
0)
/** Safe signature buffer size for psa_asymmetric_sign().