Diff: features/mbedtls/src/md.c

Revision:

0:6c56fb4bc5f0

diff -r 000000000000 -r 6c56fb4bc5f0 features/mbedtls/src/md.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/features/mbedtls/src/md.c	Fri Nov 04 20:27:58 2016 +0000
@@ -0,0 +1,471 @@
+/**
+ * \file mbedtls_md.c
+ *
+ * \brief Generic message digest wrapper for mbed TLS
+ *
+ * \author Adriaan de Jong <dejong@fox-it.com>
+ *
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_MD_C)
+
+#include "mbedtls/md.h"
+#include "mbedtls/md_internal.h"
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#include <stdlib.h>
+#define mbedtls_calloc    calloc
+#define mbedtls_free       free
+#endif
+
+#include <string.h>
+
+#if defined(MBEDTLS_FS_IO)
+#include <stdio.h>
+#endif
+
+/* Implementation that should never be optimized out by the compiler */
+static void mbedtls_zeroize( void *v, size_t n ) {
+    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
+}
+
+/*
+ * Reminder: update profiles in x509_crt.c when adding a new hash!
+ */
+static const int supported_digests[] = {
+
+#if defined(MBEDTLS_SHA512_C)
+        MBEDTLS_MD_SHA512,
+        MBEDTLS_MD_SHA384,
+#endif
+
+#if defined(MBEDTLS_SHA256_C)
+        MBEDTLS_MD_SHA256,
+        MBEDTLS_MD_SHA224,
+#endif
+
+#if defined(MBEDTLS_SHA1_C)
+        MBEDTLS_MD_SHA1,
+#endif
+
+#if defined(MBEDTLS_RIPEMD160_C)
+        MBEDTLS_MD_RIPEMD160,
+#endif
+
+#if defined(MBEDTLS_MD5_C)
+        MBEDTLS_MD_MD5,
+#endif
+
+#if defined(MBEDTLS_MD4_C)
+        MBEDTLS_MD_MD4,
+#endif
+
+#if defined(MBEDTLS_MD2_C)
+        MBEDTLS_MD_MD2,
+#endif
+
+        MBEDTLS_MD_NONE
+};
+
+const int *mbedtls_md_list( void )
+{
+    return( supported_digests );
+}
+
+const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name )
+{
+    if( NULL == md_name )
+        return( NULL );
+
+    /* Get the appropriate digest information */
+#if defined(MBEDTLS_MD2_C)
+    if( !strcmp( "MD2", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_MD2 );
+#endif
+#if defined(MBEDTLS_MD4_C)
+    if( !strcmp( "MD4", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_MD4 );
+#endif
+#if defined(MBEDTLS_MD5_C)
+    if( !strcmp( "MD5", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_MD5 );
+#endif
+#if defined(MBEDTLS_RIPEMD160_C)
+    if( !strcmp( "RIPEMD160", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_RIPEMD160 );
+#endif
+#if defined(MBEDTLS_SHA1_C)
+    if( !strcmp( "SHA1", md_name ) || !strcmp( "SHA", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 );
+#endif
+#if defined(MBEDTLS_SHA256_C)
+    if( !strcmp( "SHA224", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA224 );
+    if( !strcmp( "SHA256", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA256 );
+#endif
+#if defined(MBEDTLS_SHA512_C)
+    if( !strcmp( "SHA384", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA384 );
+    if( !strcmp( "SHA512", md_name ) )
+        return mbedtls_md_info_from_type( MBEDTLS_MD_SHA512 );
+#endif
+    return( NULL );
+}
+
+const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type )
+{
+    switch( md_type )
+    {
+#if defined(MBEDTLS_MD2_C)
+        case MBEDTLS_MD_MD2:
+            return( &mbedtls_md2_info );
+#endif
+#if defined(MBEDTLS_MD4_C)
+        case MBEDTLS_MD_MD4:
+            return( &mbedtls_md4_info );
+#endif
+#if defined(MBEDTLS_MD5_C)
+        case MBEDTLS_MD_MD5:
+            return( &mbedtls_md5_info );
+#endif
+#if defined(MBEDTLS_RIPEMD160_C)
+        case MBEDTLS_MD_RIPEMD160:
+            return( &mbedtls_ripemd160_info );
+#endif
+#if defined(MBEDTLS_SHA1_C)
+        case MBEDTLS_MD_SHA1:
+            return( &mbedtls_sha1_info );
+#endif
+#if defined(MBEDTLS_SHA256_C)
+        case MBEDTLS_MD_SHA224:
+            return( &mbedtls_sha224_info );
+        case MBEDTLS_MD_SHA256:
+            return( &mbedtls_sha256_info );
+#endif
+#if defined(MBEDTLS_SHA512_C)
+        case MBEDTLS_MD_SHA384:
+            return( &mbedtls_sha384_info );
+        case MBEDTLS_MD_SHA512:
+            return( &mbedtls_sha512_info );
+#endif
+        default:
+            return( NULL );
+    }
+}
+
+void mbedtls_md_init( mbedtls_md_context_t *ctx )
+{
+    memset( ctx, 0, sizeof( mbedtls_md_context_t ) );
+}
+
+void mbedtls_md_free( mbedtls_md_context_t *ctx )
+{
+    if( ctx == NULL || ctx->md_info == NULL )
+        return;
+
+    if( ctx->md_ctx != NULL )
+        ctx->md_info->ctx_free_func( ctx->md_ctx );
+
+    if( ctx->hmac_ctx != NULL )
+    {
+        mbedtls_zeroize( ctx->hmac_ctx, 2 * ctx->md_info->block_size );
+        mbedtls_free( ctx->hmac_ctx );
+    }
+
+    mbedtls_zeroize( ctx, sizeof( mbedtls_md_context_t ) );
+}
+
+int mbedtls_md_clone( mbedtls_md_context_t *dst,
+                      const mbedtls_md_context_t *src )
+{
+    if( dst == NULL || dst->md_info == NULL ||
+        src == NULL || src->md_info == NULL ||
+        dst->md_info != src->md_info )
+    {
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+    }
+
+    dst->md_info->clone_func( dst->md_ctx, src->md_ctx );
+
+    return( 0 );
+}
+
+#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
+int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info )
+{
+    return mbedtls_md_setup( ctx, md_info, 1 );
+}
+#endif
+
+int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac )
+{
+    if( md_info == NULL || ctx == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    if( ( ctx->md_ctx = md_info->ctx_alloc_func() ) == NULL )
+        return( MBEDTLS_ERR_MD_ALLOC_FAILED );
+
+    if( hmac != 0 )
+    {
+        ctx->hmac_ctx = mbedtls_calloc( 2, md_info->block_size );
+        if( ctx->hmac_ctx == NULL )
+        {
+            md_info->ctx_free_func( ctx->md_ctx );
+            return( MBEDTLS_ERR_MD_ALLOC_FAILED );
+        }
+    }
+
+    ctx->md_info = md_info;
+
+    return( 0 );
+}
+
+int mbedtls_md_starts( mbedtls_md_context_t *ctx )
+{
+    if( ctx == NULL || ctx->md_info == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    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 )
+{
+    if( ctx == NULL || ctx->md_info == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    ctx->md_info->update_func( ctx->md_ctx, input, ilen );
+
+    return( 0 );
+}
+
+int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output )
+{
+    if( ctx == NULL || ctx->md_info == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    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,
+            unsigned char *output )
+{
+    if( md_info == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    md_info->digest_func( input, ilen, output );
+
+    return( 0 );
+}
+
+#if defined(MBEDTLS_FS_IO)
+int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, unsigned char *output )
+{
+    int ret;
+    FILE *f;
+    size_t n;
+    mbedtls_md_context_t ctx;
+    unsigned char buf[1024];
+
+    if( md_info == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    if( ( f = fopen( path, "rb" ) ) == NULL )
+        return( MBEDTLS_ERR_MD_FILE_IO_ERROR );
+
+    mbedtls_md_init( &ctx );
+
+    if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
+        goto cleanup;
+
+    md_info->starts_func( ctx.md_ctx );
+
+    while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
+        md_info->update_func( ctx.md_ctx, buf, n );
+
+    if( ferror( f ) != 0 )
+    {
+        ret = MBEDTLS_ERR_MD_FILE_IO_ERROR;
+        goto cleanup;
+    }
+
+    md_info->finish_func( ctx.md_ctx, output );
+
+cleanup:
+    fclose( f );
+    mbedtls_md_free( &ctx );
+
+    return( ret );
+}
+#endif /* MBEDTLS_FS_IO */
+
+int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, size_t keylen )
+{
+    unsigned char sum[MBEDTLS_MD_MAX_SIZE];
+    unsigned char *ipad, *opad;
+    size_t i;
+
+    if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    if( keylen > (size_t) ctx->md_info->block_size )
+    {
+        ctx->md_info->starts_func( ctx->md_ctx );
+        ctx->md_info->update_func( ctx->md_ctx, key, keylen );
+        ctx->md_info->finish_func( ctx->md_ctx, sum );
+
+        keylen = ctx->md_info->size;
+        key = sum;
+    }
+
+    ipad = (unsigned char *) ctx->hmac_ctx;
+    opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
+
+    memset( ipad, 0x36, ctx->md_info->block_size );
+    memset( opad, 0x5C, ctx->md_info->block_size );
+
+    for( i = 0; i < keylen; i++ )
+    {
+        ipad[i] = (unsigned char)( ipad[i] ^ key[i] );
+        opad[i] = (unsigned char)( opad[i] ^ key[i] );
+    }
+
+    mbedtls_zeroize( sum, sizeof( sum ) );
+
+    ctx->md_info->starts_func( ctx->md_ctx );
+    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 )
+{
+    if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    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 )
+{
+    unsigned char tmp[MBEDTLS_MD_MAX_SIZE];
+    unsigned char *opad;
+
+    if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    opad = (unsigned char *) ctx->hmac_ctx + ctx->md_info->block_size;
+
+    ctx->md_info->finish_func( ctx->md_ctx, tmp );
+    ctx->md_info->starts_func( ctx->md_ctx );
+    ctx->md_info->update_func( ctx->md_ctx, opad, ctx->md_info->block_size );
+    ctx->md_info->update_func( ctx->md_ctx, tmp, ctx->md_info->size );
+    ctx->md_info->finish_func( ctx->md_ctx, output );
+
+    return( 0 );
+}
+
+int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
+{
+    unsigned char *ipad;
+
+    if( ctx == NULL || ctx->md_info == NULL || ctx->hmac_ctx == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    ipad = (unsigned char *) ctx->hmac_ctx;
+
+    ctx->md_info->starts_func( ctx->md_ctx );
+    ctx->md_info->update_func( ctx->md_ctx, ipad, ctx->md_info->block_size );
+
+    return( 0 );
+}
+
+int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen,
+                const unsigned char *input, size_t ilen,
+                unsigned char *output )
+{
+    mbedtls_md_context_t ctx;
+    int ret;
+
+    if( md_info == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    mbedtls_md_init( &ctx );
+
+    if( ( ret = mbedtls_md_setup( &ctx, md_info, 1 ) ) != 0 )
+        return( ret );
+
+    mbedtls_md_hmac_starts( &ctx, key, keylen );
+    mbedtls_md_hmac_update( &ctx, input, ilen );
+    mbedtls_md_hmac_finish( &ctx, output );
+
+    mbedtls_md_free( &ctx );
+
+    return( 0 );
+}
+
+int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data )
+{
+    if( ctx == NULL || ctx->md_info == NULL )
+        return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
+
+    ctx->md_info->process_func( ctx->md_ctx, data );
+
+    return( 0 );
+}
+
+unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info )
+{
+    if( md_info == NULL )
+        return( 0 );
+
+    return md_info->size;
+}
+
+mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info )
+{
+    if( md_info == NULL )
+        return( MBEDTLS_MD_NONE );
+
+    return md_info->type;
+}
+
+const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info )
+{
+    if( md_info == NULL )
+        return( NULL );
+
+    return md_info->name;
+}
+
+#endif /* MBEDTLS_MD_C */