Check return values in more places
Selective replacement of
```
^\( *\)\(mbedtls_\(md\|cipher\)_[A-Z_a-z0-9]+\)\((.*)\);
```
by
```
\1if( \2\4 != 0 )
\1{
\1 mbedtls_fprintf( stderr, "\2() returned error\\n" );
\1 goto exit;
\1}
```
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/programs/aes/crypt_and_hash.c b/programs/aes/crypt_and_hash.c
index 9ff5351..74ea88c 100644
--- a/programs/aes/crypt_and_hash.c
+++ b/programs/aes/crypt_and_hash.c
@@ -365,7 +365,11 @@
goto exit;
}
- mbedtls_md_hmac_starts( &md_ctx, digest, 32 );
+ if( mbedtls_md_hmac_starts( &md_ctx, digest, 32 ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_hmac_starts() returned error\n" );
+ goto exit;
+ }
/*
* Encrypt and write the ciphertext.
@@ -387,7 +391,11 @@
goto exit;
}
- mbedtls_md_hmac_update( &md_ctx, output, olen );
+ if( mbedtls_md_hmac_update( &md_ctx, output, olen ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_hmac_update() returned error\n" );
+ goto exit;
+ }
if( fwrite( output, 1, olen, fout ) != olen )
{
@@ -401,7 +409,11 @@
mbedtls_fprintf( stderr, "mbedtls_cipher_finish() returned error\n" );
goto exit;
}
- mbedtls_md_hmac_update( &md_ctx, output, olen );
+ if( mbedtls_md_hmac_update( &md_ctx, output, olen ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_hmac_update() returned error\n" );
+ goto exit;
+ }
if( fwrite( output, 1, olen, fout ) != olen )
{
@@ -412,7 +424,11 @@
/*
* Finally write the HMAC.
*/
- mbedtls_md_hmac_finish( &md_ctx, digest );
+ if( mbedtls_md_hmac_finish( &md_ctx, digest ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_hmac_finish() returned error\n" );
+ goto exit;
+ }
if( fwrite( digest, 1, mbedtls_md_get_size( md_info ), fout ) != mbedtls_md_get_size( md_info ) )
{
@@ -481,10 +497,26 @@
for( i = 0; i < 8192; i++ )
{
- mbedtls_md_starts( &md_ctx );
- mbedtls_md_update( &md_ctx, digest, 32 );
- mbedtls_md_update( &md_ctx, key, keylen );
- mbedtls_md_finish( &md_ctx, digest );
+ if( mbedtls_md_starts( &md_ctx ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_starts() returned error\n" );
+ goto exit;
+ }
+ if( mbedtls_md_update( &md_ctx, digest, 32 ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_update() returned error\n" );
+ goto exit;
+ }
+ if( mbedtls_md_update( &md_ctx, key, keylen ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_update() returned error\n" );
+ goto exit;
+ }
+ if( mbedtls_md_finish( &md_ctx, digest ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_finish() returned error\n" );
+ goto exit;
+ }
}
if( mbedtls_cipher_setkey( &cipher_ctx,
@@ -508,7 +540,11 @@
goto exit;
}
- mbedtls_md_hmac_starts( &md_ctx, digest, 32 );
+ if( mbedtls_md_hmac_starts( &md_ctx, digest, 32 ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_hmac_starts() returned error\n" );
+ goto exit;
+ }
/*
* Decrypt and write the plaintext.
@@ -525,7 +561,11 @@
goto exit;
}
- mbedtls_md_hmac_update( &md_ctx, buffer, ilen );
+ if( mbedtls_md_hmac_update( &md_ctx, buffer, ilen ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_hmac_update() returned error\n" );
+ goto exit;
+ }
if( mbedtls_cipher_update( &cipher_ctx, buffer, ilen, output,
&olen ) != 0 )
{
@@ -543,7 +583,11 @@
/*
* Verify the message authentication code.
*/
- mbedtls_md_hmac_finish( &md_ctx, digest );
+ if( mbedtls_md_hmac_finish( &md_ctx, digest ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_md_hmac_finish() returned error\n" );
+ goto exit;
+ }
if( fread( buffer, 1, mbedtls_md_get_size( md_info ), fin ) != mbedtls_md_get_size( md_info ) )
{
@@ -566,7 +610,11 @@
/*
* Write the final block of data
*/
- mbedtls_cipher_finish( &cipher_ctx, output, &olen );
+ if( mbedtls_cipher_finish( &cipher_ctx, output, &olen ) != 0 )
+ {
+ mbedtls_fprintf( stderr, "mbedtls_cipher_finish() returned error\n" );
+ goto exit;
+ }
if( fwrite( output, 1, olen, fout ) != olen )
{
