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Fix missing error checking in gcm

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Manuel Pégourié-Gonnard 2014-01-18 18:49:32 +01:00 committed by Paul Bakker
parent 4091141368
commit b55f578982
1 changed files with 7 additions and 1 deletions
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8
library/gcm.c
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@ -309,9 +309,15 @@ int gcm_auth_decrypt( gcm_context *ctx,
const unsigned char *input,
unsigned char *output )
{
int ret;
unsigned char check_tag[16];
gcm_crypt_and_tag( ctx, GCM_DECRYPT, length, iv, iv_len, add, add_len, input, output, tag_len, check_tag );
if( ( ret = gcm_crypt_and_tag( ctx, GCM_DECRYPT, length,
iv, iv_len, add, add_len,
input, output, tag_len, check_tag ) ) != 0 )
{
return( ret );
}
if( memcmp( check_tag, tag, tag_len ) == 0 )
return( 0 );