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-rw-r--r--polarssl/src/library/cipher.c557
1 files changed, 0 insertions, 557 deletions
diff --git a/polarssl/src/library/cipher.c b/polarssl/src/library/cipher.c
deleted file mode 100644
index 0d1258b..0000000
--- a/polarssl/src/library/cipher.c
+++ /dev/null
@@ -1,557 +0,0 @@
-/**
- * \file cipher.c
- *
- * \brief Generic cipher wrapper for PolarSSL
- *
- * \author Adriaan de Jong <dejong@fox-it.com>
- *
- * Copyright (C) 2006-2012, Brainspark B.V.
- *
- * This file is part of PolarSSL (http://www.polarssl.org)
- * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "polarssl/config.h"
-
-#if defined(POLARSSL_CIPHER_C)
-
-#include "polarssl/cipher.h"
-#include "polarssl/cipher_wrap.h"
-
-#include <stdlib.h>
-
-#if defined _MSC_VER && !defined strcasecmp
-#define strcasecmp _stricmp
-#endif
-
-static const int supported_ciphers[] = {
-
-#if defined(POLARSSL_AES_C)
- POLARSSL_CIPHER_AES_128_CBC,
- POLARSSL_CIPHER_AES_192_CBC,
- POLARSSL_CIPHER_AES_256_CBC,
-
-#if defined(POLARSSL_CIPHER_MODE_CFB)
- POLARSSL_CIPHER_AES_128_CFB128,
- POLARSSL_CIPHER_AES_192_CFB128,
- POLARSSL_CIPHER_AES_256_CFB128,
-#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
-
-#if defined(POLARSSL_CIPHER_MODE_CTR)
- POLARSSL_CIPHER_AES_128_CTR,
- POLARSSL_CIPHER_AES_192_CTR,
- POLARSSL_CIPHER_AES_256_CTR,
-#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
-
-#endif /* defined(POLARSSL_AES_C) */
-
-#if defined(POLARSSL_CAMELLIA_C)
- POLARSSL_CIPHER_CAMELLIA_128_CBC,
- POLARSSL_CIPHER_CAMELLIA_192_CBC,
- POLARSSL_CIPHER_CAMELLIA_256_CBC,
-
-#if defined(POLARSSL_CIPHER_MODE_CFB)
- POLARSSL_CIPHER_CAMELLIA_128_CFB128,
- POLARSSL_CIPHER_CAMELLIA_192_CFB128,
- POLARSSL_CIPHER_CAMELLIA_256_CFB128,
-#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
-
-#if defined(POLARSSL_CIPHER_MODE_CTR)
- POLARSSL_CIPHER_CAMELLIA_128_CTR,
- POLARSSL_CIPHER_CAMELLIA_192_CTR,
- POLARSSL_CIPHER_CAMELLIA_256_CTR,
-#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
-
-#endif /* defined(POLARSSL_CAMELLIA_C) */
-
-#if defined(POLARSSL_DES_C)
- POLARSSL_CIPHER_DES_CBC,
- POLARSSL_CIPHER_DES_EDE_CBC,
- POLARSSL_CIPHER_DES_EDE3_CBC,
-#endif /* defined(POLARSSL_DES_C) */
-
-#if defined(POLARSSL_CIPHER_NULL_CIPHER)
- POLARSSL_CIPHER_NULL,
-#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
-
- 0
-};
-
-const int *cipher_list( void )
-{
- return supported_ciphers;
-}
-
-const cipher_info_t *cipher_info_from_type( const cipher_type_t cipher_type )
-{
- /* Find static cipher information */
- switch ( cipher_type )
- {
-#if defined(POLARSSL_AES_C)
- case POLARSSL_CIPHER_AES_128_CBC:
- return &aes_128_cbc_info;
- case POLARSSL_CIPHER_AES_192_CBC:
- return &aes_192_cbc_info;
- case POLARSSL_CIPHER_AES_256_CBC:
- return &aes_256_cbc_info;
-
-#if defined(POLARSSL_CIPHER_MODE_CFB)
- case POLARSSL_CIPHER_AES_128_CFB128:
- return &aes_128_cfb128_info;
- case POLARSSL_CIPHER_AES_192_CFB128:
- return &aes_192_cfb128_info;
- case POLARSSL_CIPHER_AES_256_CFB128:
- return &aes_256_cfb128_info;
-#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
-
-#if defined(POLARSSL_CIPHER_MODE_CTR)
- case POLARSSL_CIPHER_AES_128_CTR:
- return &aes_128_ctr_info;
- case POLARSSL_CIPHER_AES_192_CTR:
- return &aes_192_ctr_info;
- case POLARSSL_CIPHER_AES_256_CTR:
- return &aes_256_ctr_info;
-#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
-
-#endif
-
-#if defined(POLARSSL_CAMELLIA_C)
- case POLARSSL_CIPHER_CAMELLIA_128_CBC:
- return &camellia_128_cbc_info;
- case POLARSSL_CIPHER_CAMELLIA_192_CBC:
- return &camellia_192_cbc_info;
- case POLARSSL_CIPHER_CAMELLIA_256_CBC:
- return &camellia_256_cbc_info;
-
-#if defined(POLARSSL_CIPHER_MODE_CFB)
- case POLARSSL_CIPHER_CAMELLIA_128_CFB128:
- return &camellia_128_cfb128_info;
- case POLARSSL_CIPHER_CAMELLIA_192_CFB128:
- return &camellia_192_cfb128_info;
- case POLARSSL_CIPHER_CAMELLIA_256_CFB128:
- return &camellia_256_cfb128_info;
-#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
-
-#if defined(POLARSSL_CIPHER_MODE_CTR)
- case POLARSSL_CIPHER_CAMELLIA_128_CTR:
- return &camellia_128_ctr_info;
- case POLARSSL_CIPHER_CAMELLIA_192_CTR:
- return &camellia_192_ctr_info;
- case POLARSSL_CIPHER_CAMELLIA_256_CTR:
- return &camellia_256_ctr_info;
-#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
-
-#endif
-
-#if defined(POLARSSL_DES_C)
- case POLARSSL_CIPHER_DES_CBC:
- return &des_cbc_info;
- case POLARSSL_CIPHER_DES_EDE_CBC:
- return &des_ede_cbc_info;
- case POLARSSL_CIPHER_DES_EDE3_CBC:
- return &des_ede3_cbc_info;
-#endif
-
-#if defined(POLARSSL_CIPHER_NULL_CIPHER)
- case POLARSSL_CIPHER_NULL:
- return &null_cipher_info;
-#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
-
- default:
- return NULL;
- }
-}
-
-const cipher_info_t *cipher_info_from_string( const char *cipher_name )
-{
- if( NULL == cipher_name )
- return NULL;
-
- /* Get the appropriate cipher information */
-#if defined(POLARSSL_CAMELLIA_C)
- if( !strcasecmp( "CAMELLIA-128-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_128_CBC );
- if( !strcasecmp( "CAMELLIA-192-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_192_CBC );
- if( !strcasecmp( "CAMELLIA-256-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_256_CBC );
-
-#if defined(POLARSSL_CIPHER_MODE_CFB)
- if( !strcasecmp( "CAMELLIA-128-CFB128", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_128_CFB128 );
- if( !strcasecmp( "CAMELLIA-192-CFB128", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_192_CFB128 );
- if( !strcasecmp( "CAMELLIA-256-CFB128", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_256_CFB128 );
-#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
-
-#if defined(POLARSSL_CIPHER_MODE_CTR)
- if( !strcasecmp( "CAMELLIA-128-CTR", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_128_CTR );
- if( !strcasecmp( "CAMELLIA-192-CTR", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_192_CTR );
- if( !strcasecmp( "CAMELLIA-256-CTR", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_256_CTR );
-#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
-#endif
-
-#if defined(POLARSSL_AES_C)
- if( !strcasecmp( "AES-128-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_128_CBC );
- if( !strcasecmp( "AES-192-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_192_CBC );
- if( !strcasecmp( "AES-256-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_256_CBC );
-
-#if defined(POLARSSL_CIPHER_MODE_CFB)
- if( !strcasecmp( "AES-128-CFB128", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_128_CFB128 );
- if( !strcasecmp( "AES-192-CFB128", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_192_CFB128 );
- if( !strcasecmp( "AES-256-CFB128", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_256_CFB128 );
-#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
-
-#if defined(POLARSSL_CIPHER_MODE_CTR)
- if( !strcasecmp( "AES-128-CTR", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_128_CTR );
- if( !strcasecmp( "AES-192-CTR", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_192_CTR );
- if( !strcasecmp( "AES-256-CTR", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_AES_256_CTR );
-#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
-#endif
-
-#if defined(POLARSSL_DES_C)
- if( !strcasecmp( "DES-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_DES_CBC );
- if( !strcasecmp( "DES-EDE-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_DES_EDE_CBC );
- if( !strcasecmp( "DES-EDE3-CBC", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_DES_EDE3_CBC );
-#endif
-
-#if defined(POLARSSL_CIPHER_NULL_CIPHER)
- if( !strcasecmp( "NULL", cipher_name ) )
- return cipher_info_from_type( POLARSSL_CIPHER_NULL );
-#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
-
- return NULL;
-}
-
-int cipher_init_ctx( cipher_context_t *ctx, const cipher_info_t *cipher_info )
-{
- if( NULL == cipher_info || NULL == ctx )
- return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
-
- memset( ctx, 0, sizeof( cipher_context_t ) );
-
- if( NULL == ( ctx->cipher_ctx = cipher_info->base->ctx_alloc_func() ) )
- return POLARSSL_ERR_CIPHER_ALLOC_FAILED;
-
- ctx->cipher_info = cipher_info;
-
- return 0;
-}
-
-int cipher_free_ctx( cipher_context_t *ctx )
-{
- if( ctx == NULL || ctx->cipher_info == NULL )
- return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
-
- ctx->cipher_info->base->ctx_free_func( ctx->cipher_ctx );
-
- return 0;
-}
-
-int cipher_setkey( cipher_context_t *ctx, const unsigned char *key,
- int key_length, const operation_t operation )
-{
- if( NULL == ctx || NULL == ctx->cipher_info )
- return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
-
- ctx->key_length = key_length;
- ctx->operation = operation;
-
-#if defined(POLARSSL_CIPHER_NULL_CIPHER)
- if( ctx->cipher_info->mode == POLARSSL_MODE_NULL )
- return 0;
-#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
-
- /*
- * For CFB128 and CTR mode always use the encryption key schedule
- */
- if( POLARSSL_ENCRYPT == operation ||
- POLARSSL_MODE_CFB128 == ctx->cipher_info->mode ||
- POLARSSL_MODE_CTR == ctx->cipher_info->mode )
- {
- return ctx->cipher_info->base->setkey_enc_func( ctx->cipher_ctx, key,
- ctx->key_length );
- }
-
- if( POLARSSL_DECRYPT == operation )
- return ctx->cipher_info->base->setkey_dec_func( ctx->cipher_ctx, key,
- ctx->key_length );
-
- return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
-}
-
-int cipher_reset( cipher_context_t *ctx, const unsigned char *iv )
-{
- if( NULL == ctx || NULL == ctx->cipher_info || NULL == iv )
- return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
-
- ctx->unprocessed_len = 0;
-
- memcpy( ctx->iv, iv, cipher_get_iv_size( ctx ) );
-
- return 0;
-}
-
-int cipher_update( cipher_context_t *ctx, const unsigned char *input, size_t ilen,
- unsigned char *output, size_t *olen )
-{
- int ret;
- size_t copy_len = 0;
-
- if( NULL == ctx || NULL == ctx->cipher_info || NULL == olen ||
- input == output )
- {
- return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
- }
-
- *olen = 0;
-
-#if defined(POLARSSL_CIPHER_NULL_CIPHER)
- if( ctx->cipher_info->mode == POLARSSL_MODE_NULL )
- {
- memcpy( output, input, ilen );
- *olen = ilen;
- return 0;
- }
-#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
-
- if( ctx->cipher_info->mode == POLARSSL_MODE_CBC )
- {
- /*
- * If there is not enough data for a full block, cache it.
- */
- if( ( ctx->operation == POLARSSL_DECRYPT &&
- ilen + ctx->unprocessed_len <= cipher_get_block_size( ctx ) ) ||
- ( ctx->operation == POLARSSL_ENCRYPT &&
- ilen + ctx->unprocessed_len < cipher_get_block_size( ctx ) ) )
- {
- memcpy( &( ctx->unprocessed_data[ctx->unprocessed_len] ), input,
- ilen );
-
- ctx->unprocessed_len += ilen;
- return 0;
- }
-
- /*
- * Process cached data first
- */
- if( ctx->unprocessed_len != 0 )
- {
- copy_len = cipher_get_block_size( ctx ) - ctx->unprocessed_len;
-
- memcpy( &( ctx->unprocessed_data[ctx->unprocessed_len] ), input,
- copy_len );
-
- if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
- ctx->operation, cipher_get_block_size( ctx ), ctx->iv,
- ctx->unprocessed_data, output ) ) )
- {
- return ret;
- }
-
- *olen += cipher_get_block_size( ctx );
- output += cipher_get_block_size( ctx );
- ctx->unprocessed_len = 0;
-
- input += copy_len;
- ilen -= copy_len;
- }
-
- /*
- * Cache final, incomplete block
- */
- if( 0 != ilen )
- {
- copy_len = ilen % cipher_get_block_size( ctx );
- if( copy_len == 0 && ctx->operation == POLARSSL_DECRYPT )
- copy_len = cipher_get_block_size(ctx);
-
- memcpy( ctx->unprocessed_data, &( input[ilen - copy_len] ),
- copy_len );
-
- ctx->unprocessed_len += copy_len;
- ilen -= copy_len;
- }
-
- /*
- * Process remaining full blocks
- */
- if( ilen )
- {
- if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
- ctx->operation, ilen, ctx->iv, input, output ) ) )
- {
- return ret;
- }
- *olen += ilen;
- }
-
- return 0;
- }
-
- if( ctx->cipher_info->mode == POLARSSL_MODE_CFB128 )
- {
- if( 0 != ( ret = ctx->cipher_info->base->cfb128_func( ctx->cipher_ctx,
- ctx->operation, ilen, &ctx->unprocessed_len, ctx->iv,
- input, output ) ) )
- {
- return ret;
- }
-
- *olen = ilen;
-
- return 0;
- }
-
- if( ctx->cipher_info->mode == POLARSSL_MODE_CTR )
- {
- if( 0 != ( ret = ctx->cipher_info->base->ctr_func( ctx->cipher_ctx,
- ilen, &ctx->unprocessed_len, ctx->iv,
- ctx->unprocessed_data, input, output ) ) )
- {
- return ret;
- }
-
- *olen = ilen;
-
- return 0;
- }
-
- return POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE;
-}
-
-static void add_pkcs_padding( unsigned char *output, size_t output_len,
- size_t data_len )
-{
- size_t padding_len = output_len - data_len;
- unsigned char i = 0;
-
- for( i = 0; i < padding_len; i++ )
- output[data_len + i] = (unsigned char) padding_len;
-}
-
-static int get_pkcs_padding( unsigned char *input, unsigned int input_len,
- size_t *data_len)
-{
- unsigned int i, padding_len = 0;
-
- if( NULL == input || NULL == data_len )
- return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
-
- padding_len = input[input_len - 1];
-
- if( padding_len > input_len )
- return POLARSSL_ERR_CIPHER_INVALID_PADDING;
-
- for( i = input_len - padding_len; i < input_len; i++ )
- if( input[i] != padding_len )
- return POLARSSL_ERR_CIPHER_INVALID_PADDING;
-
- *data_len = input_len - padding_len;
-
- return 0;
-}
-
-int cipher_finish( cipher_context_t *ctx, unsigned char *output, size_t *olen)
-{
- int ret = 0;
-
- if( NULL == ctx || NULL == ctx->cipher_info || NULL == olen )
- return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
-
- *olen = 0;
-
- if( POLARSSL_MODE_CFB128 == ctx->cipher_info->mode ||
- POLARSSL_MODE_CTR == ctx->cipher_info->mode ||
- POLARSSL_MODE_NULL == ctx->cipher_info->mode )
- {
- return 0;
- }
-
- if( POLARSSL_MODE_CBC == ctx->cipher_info->mode )
- {
- if( POLARSSL_ENCRYPT == ctx->operation )
- {
- add_pkcs_padding( ctx->unprocessed_data, cipher_get_iv_size( ctx ),
- ctx->unprocessed_len );
- }
- else if ( cipher_get_block_size( ctx ) != ctx->unprocessed_len )
- {
- /* For decrypt operations, expect a full block */
- return POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED;
- }
-
- /* cipher block */
- if( 0 != ( ret = ctx->cipher_info->base->cbc_func( ctx->cipher_ctx,
- ctx->operation, cipher_get_block_size( ctx ), ctx->iv,
- ctx->unprocessed_data, output ) ) )
- {
- return ret;
- }
-
- /* Set output size for decryption */
- if( POLARSSL_DECRYPT == ctx->operation )
- return get_pkcs_padding( output, cipher_get_block_size( ctx ), olen );
-
- /* Set output size for encryption */
- *olen = cipher_get_block_size( ctx );
- return 0;
- }
-
- return POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE;
-}
-
-#if defined(POLARSSL_SELF_TEST)
-
-#include <stdio.h>
-
-#define ASSERT(x) if (!(x)) { \
- printf( "failed with %i at %s\n", value, (#x) ); \
- return( 1 ); \
-}
-/*
- * Checkup routine
- */
-
-int cipher_self_test( int verbose )
-{
- ((void) verbose);
-
- return( 0 );
-}
-
-#endif
-
-#endif