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Change over to specific per algorith size checks

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Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This commit is contained in:
Paul Elliott 2021-07-23 15:44:11 +01:00
parent 0a6a5694d9
commit ecce901907
1 changed files with 11 additions and 4 deletions
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15
library/psa_crypto_aead.c
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@ -568,13 +568,12 @@ psa_status_t mbedtls_psa_aead_update(
update_output_length = input_length;
if( PSA_AEAD_UPDATE_OUTPUT_SIZE( operation->key_type, operation->alg,
input_length ) > output_size )
return ( PSA_ERROR_BUFFER_TOO_SMALL );
#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
if( operation->alg == PSA_ALG_GCM )
{
if( output_size < input_length )
return( PSA_ERROR_BUFFER_TOO_SMALL );
status = mbedtls_to_psa_error(
mbedtls_gcm_update( &operation->ctx.gcm,
input, input_length,
@ -586,6 +585,9 @@ psa_status_t mbedtls_psa_aead_update(
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)
if( operation->alg == PSA_ALG_CHACHA20_POLY1305 )
{
if( output_size < input_length )
return( PSA_ERROR_BUFFER_TOO_SMALL );
status = mbedtls_to_psa_error(
mbedtls_chachapoly_update( &operation->ctx.chachapoly,
input_length,
@ -625,10 +627,15 @@ psa_status_t mbedtls_psa_aead_finish(
#if defined(MBEDTLS_PSA_BUILTIN_ALG_GCM)
if( operation->alg == PSA_ALG_GCM )
{
if( ciphertext_size < 15 )
return( PSA_ERROR_BUFFER_TOO_SMALL );
status = mbedtls_to_psa_error(
mbedtls_gcm_finish( &operation->ctx.gcm,
ciphertext, ciphertext_size,
tag, operation->tag_length ) );
}
else
#endif /* MBEDTLS_PSA_BUILTIN_ALG_GCM */
#if defined(MBEDTLS_PSA_BUILTIN_ALG_CHACHA20_POLY1305)