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Zeroize tmp bufs in hmac_drbg.c functions

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This commit is contained in:
Andres Amaya Garcia 2017-06-26 10:22:24 +01:00
parent 1adcd95a25
commit 3fee7593a9
1 changed files with 10 additions and 5 deletions
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15
library/hmac_drbg.c
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@ -364,11 +364,14 @@ int mbedtls_hmac_drbg_write_seed_file( mbedtls_hmac_drbg_context *ctx, const cha
exit:
fclose( f );
mbedtls_zeroize( buf, sizeof( buf ) );
return( ret );
}
int mbedtls_hmac_drbg_update_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path )
{
int ret = 0;
FILE *f;
size_t n;
unsigned char buf[ MBEDTLS_HMAC_DRBG_MAX_INPUT ];
@ -387,14 +390,16 @@ int mbedtls_hmac_drbg_update_seed_file( mbedtls_hmac_drbg_context *ctx, const ch
}
if( fread( buf, 1, n, f ) != n )
{
fclose( f );
return( MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR );
}
ret = MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR;
else
mbedtls_hmac_drbg_update( ctx, buf, n );
fclose( f );
mbedtls_hmac_drbg_update( ctx, buf, n );
mbedtls_zeroize( buf, sizeof( buf ) );
if( ret != 0 )
return( ret );
return( mbedtls_hmac_drbg_write_seed_file( ctx, path ) );
}