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Fix PSA AEAD GCM's update output buffer length verification.

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Move GCM's update output buffer length verification
from PSA AEAD to the built-in implementation of the GCM.

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
This commit is contained in:
Mateusz Starzyk 2021-10-04 13:46:38 +02:00
parent f28261fc14
commit c48f43b44d
6 changed files with 37 additions and 4 deletions
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2
library/gcm.c
View file

@ -431,7 +431,7 @@ int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
unsigned char ectr[16];
if( output_size < input_length )
return( MBEDTLS_ERR_GCM_BAD_INPUT );
return( MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL );
GCM_VALIDATE_RET( output_length != NULL );
*output_length = input_length;

3
library/psa_crypto_aead.c
View file

@ -510,9 +510,6 @@ psa_status_t mbedtls_psa_aead_update(
#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,