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Fix functions in MD layer to check return codes

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This commit is contained in:
Andres Amaya Garcia 2017-06-28 14:16:07 +01:00
parent 5f872df26a
commit 0dd4fa0f45
1 changed files with 54 additions and 47 deletions
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101
library/md.c
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@ -250,9 +250,7 @@ int mbedtls_md_starts( mbedtls_md_context_t *ctx )
if( ctx == NULL || ctx->md_info == NULL ) if( ctx == NULL || ctx->md_info == NULL )
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
ctx->md_info->starts_func( ctx->md_ctx ); return( ctx->md_info->starts_func( ctx->md_ctx ) );
return( 0 );
} }
int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen ) int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
@ -260,9 +258,7 @@ int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, si
if( ctx == NULL || ctx->md_info == NULL ) if( ctx == NULL || ctx->md_info == NULL )
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
ctx->md_info->update_func( ctx->md_ctx, input, ilen ); return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) );
return( 0 );
} }
int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output ) int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
@ -270,9 +266,7 @@ int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
if( ctx == NULL || ctx->md_info == NULL ) if( ctx == NULL || ctx->md_info == NULL )
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
ctx->md_info->finish_func( ctx->md_ctx, output ); return( ctx->md_info->finish_func( ctx->md_ctx, output ) );
return( 0 );
} }
int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen, int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
@ -281,9 +275,7 @@ int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, si
if( md_info == NULL ) if( md_info == NULL )
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
md_info->digest_func( input, ilen, output ); return( md_info->digest_func( input, ilen, output ) );
return( 0 );
} }
#if defined(MBEDTLS_FS_IO) #if defined(MBEDTLS_FS_IO)
@ -306,10 +298,12 @@ int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigne
if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 ) if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
goto cleanup; goto cleanup;
md_info->starts_func( ctx.md_ctx ); if( ( ret = md_info->starts_func( ctx.md_ctx ) ) != 0 )
goto cleanup;
while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 ) while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
md_info->update_func( ctx.md_ctx, buf, n ); if( ( ret = md_info->update_func( ctx.md_ctx, buf, n ) ) != 0 )
goto cleanup;
if( ferror( f ) != 0 ) if( ferror( f ) != 0 )
{ {
@ -317,7 +311,7 @@ int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigne
goto cleanup; goto cleanup;
} }
md_info->finish_func( ctx.md_ctx, output ); ret = md_info->finish_func( ctx.md_ctx, output );
cleanup: cleanup:
fclose( f ); fclose( f );
@ -329,6 +323,7 @@ cleanup:
int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen ) int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen )
{ {
int ret;
unsigned char sum[MBEDTLS_MD_MAX_SIZE]; unsigned char sum[MBEDTLS_MD_MAX_SIZE];
unsigned char *ipad, *opad; unsigned char *ipad, *opad;
size_t i; size_t i;
@ -338,9 +333,12 @@ int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
if( keylen > (size_t) ctx->md_info->block_size ) if( keylen > (size_t) ctx->md_info->block_size )
{ {
ctx->md_info->starts_func( ctx->md_ctx ); if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
ctx->md_info->update_func( ctx->md_ctx, key, keylen ); goto cleanup;
ctx->md_info->finish_func( ctx->md_ctx, sum ); if( ( ret = ctx->md_info->update_func( ctx->md_ctx, key, keylen ) ) != 0 )
goto cleanup;
if( ( ret = ctx->md_info->finish_func( ctx->md_ctx, sum ) ) != 0 )
goto cleanup;
keylen = ctx->md_info->size; keylen = ctx->md_info->size;
key = sum; key = sum;
@ -358,12 +356,15 @@ int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
opad[i] = (unsigned char)( opad[i] ^ key[i] ); opad[i] = (unsigned char)( opad[i] ^ key[i] );
} }
if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
goto cleanup;
ret = ctx->md_info->update_func( ctx->md_ctx, ipad,
ctx->md_info->block_size );
cleanup:
mbedtls_zeroize( sum, sizeof( sum ) ); mbedtls_zeroize( sum, sizeof( sum ) );
ctx->md_info->starts_func( ctx->md_ctx ); return( ret );
ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size );
return( 0 );
} }
int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen ) int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen )
@ -371,13 +372,12 @@ int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *inpu
if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL ) if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
ctx->md_info->update_func( ctx->md_ctx, input, ilen ); return( ctx->md_info->update_func( ctx->md_ctx, input, ilen ) );
return( 0 );
} }
int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output ) int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
{ {
int ret;
unsigned char tmp[MBEDTLS_MD_MAX_SIZE]; unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
unsigned char *opad; unsigned char *opad;
@ -386,17 +386,22 @@ int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size; opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
ctx->md_info->finish_func( ctx->md_ctx, tmp ); if( ( ret = ctx->md_info->finish_func( ctx->md_ctx, tmp ) ) != 0 )
ctx->md_info->starts_func( ctx->md_ctx ); return( ret );
ctx->md_info->update_func( ctx->md_ctx, opad, ctx->md_info->block_size ); if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
ctx->md_info->update_func( ctx->md_ctx, tmp, ctx->md_info->size ); return( ret );
ctx->md_info->finish_func( ctx->md_ctx, output ); if( ( ret = ctx->md_info->update_func( ctx->md_ctx, opad,
ctx->md_info->block_size ) ) != 0 )
return( 0 ); return( ret );
if( ( ret = ctx->md_info->update_func( ctx->md_ctx, tmp,
ctx->md_info->size ) ) != 0 )
return( ret );
return( ctx->md_info->finish_func( ctx->md_ctx, output ) );
} }
int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx ) int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
{ {
int ret;
unsigned char *ipad; unsigned char *ipad;
if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL ) if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
@ -404,15 +409,16 @@ int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
ipad = (unsigned char *) ctx->hmac_ctx; ipad = (unsigned char *) ctx->hmac_ctx;
ctx->md_info->starts_func( ctx->md_ctx ); if( ( ret = ctx->md_info->starts_func( ctx->md_ctx ) ) != 0 )
ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size ); return( ret );
return( ctx->md_info->update_func( ctx->md_ctx, ipad,
return( 0 ); ctx->md_info->block_size ) );
} }
int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen, int mbedtls_md_hmac( const mbedtls_md_info_t *md_info,
const unsigned char *input, size_t ilen, const unsigned char *key, size_t keylen,
unsigned char *output ) const unsigned char *input, size_t ilen,
unsigned char *output )
{ {
mbedtls_md_context_t ctx; mbedtls_md_context_t ctx;
int ret; int ret;
@ -423,15 +429,18 @@ int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key,
mbedtls_md_init( &ctx ); mbedtls_md_init( &ctx );
if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 ) if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 )
return( ret ); goto cleanup;
mbedtls_md_hmac_starts( &ctx, key, keylen ); if( ( ret = mbedtls_md_hmac_starts( &ctx, key, keylen ) ) != 0 )
mbedtls_md_hmac_update( &ctx, input, ilen ); goto cleanup;
mbedtls_md_hmac_finish( &ctx, output ); if( ( ret = mbedtls_md_hmac_update( &ctx, input, ilen ) ) != 0 )
goto cleanup;
ret = mbedtls_md_hmac_finish( &ctx, output );
cleanup:
mbedtls_md_free( &ctx ); mbedtls_md_free( &ctx );
return( 0 ); return( ret );
} }
int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data ) int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
@ -439,9 +448,7 @@ int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
if( ctx == NULL || ctx->md_info == NULL ) if( ctx == NULL || ctx->md_info == NULL )
return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
ctx->md_info->process_func( ctx->md_ctx, data ); return( ctx->md_info->process_func( ctx->md_ctx, data ) );
return( 0 );
} }
unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info ) unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info )