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Add buffer copying to psa_aead_generate_nonce()

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Note that this is not strictly necessary as this function only copies to
the output buffer at the end. However, it simplifies testing for the
time being.

Future optimisation work could consider removing this copying.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
This commit is contained in:
David Horstmann 2023-12-11 14:46:04 +00:00
parent 7f2e040a9b
commit d3cad8b017
1 changed files with 6 additions and 1 deletions
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7
library/psa_crypto.c
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@ -4876,7 +4876,7 @@ psa_status_t psa_aead_decrypt_setup(psa_aead_operation_t *operation,
/* Generate a random nonce / IV for multipart AEAD operation */
psa_status_t psa_aead_generate_nonce(psa_aead_operation_t *operation,
uint8_t *nonce,
uint8_t *nonce_external,
size_t nonce_size,
size_t *nonce_length)
{
@ -4884,6 +4884,9 @@ psa_status_t psa_aead_generate_nonce(psa_aead_operation_t *operation,
uint8_t local_nonce[PSA_AEAD_NONCE_MAX_SIZE];
size_t required_nonce_size = 0;
LOCAL_OUTPUT_DECLARE(nonce_external, nonce);
LOCAL_OUTPUT_ALLOC(nonce_external, nonce_size, nonce);
*nonce_length = 0;
if (operation->id == 0) {
@ -4927,6 +4930,8 @@ exit:
psa_aead_abort(operation);
}
LOCAL_OUTPUT_FREE(nonce_external, nonce);
return status;
}