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PolarSSL: update to current stable version (1.3.4)
I just removed Externals/polarssl/, added the new version, then deleted the following files/directories: DartConfiguration.tcl Makefile doxygen/ library/Makefile programs/ scripts/ tests/ visualc/
This commit is contained in:
Tillmann Karras
728
Externals/polarssl/library/cipher.c
vendored
728
Externals/polarssl/library/cipher.c
vendored
@ -5,7 +5,7 @@
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*
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* \author Adriaan de Jong <dejong@fox-it.com>
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*
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* Copyright (C) 2006-2012, Brainspark B.V.
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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@ -34,267 +34,80 @@
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#include "polarssl/cipher.h"
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#include "polarssl/cipher_wrap.h"
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#if defined(POLARSSL_GCM_C)
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#include "polarssl/gcm.h"
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#endif
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#include <stdlib.h>
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#if defined _MSC_VER && !defined strcasecmp
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#if defined(POLARSSL_ARC4_C) || defined(POLARSSL_CIPHER_NULL_CIPHER)
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#define POLARSSL_CIPHER_MODE_STREAM
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#endif
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#if defined(_MSC_VER) && !defined strcasecmp && !defined(EFIX64) && \
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!defined(EFI32)
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#define strcasecmp _stricmp
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#endif
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static const int supported_ciphers[] = {
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#if defined(POLARSSL_AES_C)
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POLARSSL_CIPHER_AES_128_CBC,
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POLARSSL_CIPHER_AES_192_CBC,
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POLARSSL_CIPHER_AES_256_CBC,
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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POLARSSL_CIPHER_AES_128_CFB128,
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POLARSSL_CIPHER_AES_192_CFB128,
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POLARSSL_CIPHER_AES_256_CFB128,
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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POLARSSL_CIPHER_AES_128_CTR,
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POLARSSL_CIPHER_AES_192_CTR,
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POLARSSL_CIPHER_AES_256_CTR,
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif /* defined(POLARSSL_AES_C) */
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#if defined(POLARSSL_CAMELLIA_C)
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POLARSSL_CIPHER_CAMELLIA_128_CBC,
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POLARSSL_CIPHER_CAMELLIA_192_CBC,
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POLARSSL_CIPHER_CAMELLIA_256_CBC,
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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POLARSSL_CIPHER_CAMELLIA_128_CFB128,
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POLARSSL_CIPHER_CAMELLIA_192_CFB128,
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POLARSSL_CIPHER_CAMELLIA_256_CFB128,
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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POLARSSL_CIPHER_CAMELLIA_128_CTR,
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POLARSSL_CIPHER_CAMELLIA_192_CTR,
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POLARSSL_CIPHER_CAMELLIA_256_CTR,
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif /* defined(POLARSSL_CAMELLIA_C) */
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#if defined(POLARSSL_DES_C)
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POLARSSL_CIPHER_DES_CBC,
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POLARSSL_CIPHER_DES_EDE_CBC,
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POLARSSL_CIPHER_DES_EDE3_CBC,
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#endif /* defined(POLARSSL_DES_C) */
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#if defined(POLARSSL_BLOWFISH_C)
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POLARSSL_CIPHER_BLOWFISH_CBC,
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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POLARSSL_CIPHER_BLOWFISH_CFB64,
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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POLARSSL_CIPHER_BLOWFISH_CTR,
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif /* defined(POLARSSL_BLOWFISH_C) */
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#if defined(POLARSSL_CIPHER_NULL_CIPHER)
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POLARSSL_CIPHER_NULL,
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#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
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0
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};
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static int supported_init = 0;
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const int *cipher_list( void )
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{
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const cipher_definition_t *def;
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int *type;
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if( ! supported_init )
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{
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def = cipher_definitions;
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type = supported_ciphers;
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while( def->type != 0 )
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*type++ = (*def++).type;
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*type = 0;
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supported_init = 1;
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}
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return supported_ciphers;
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}
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const cipher_info_t *cipher_info_from_type( const cipher_type_t cipher_type )
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{
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/* Find static cipher information */
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switch ( cipher_type )
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{
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#if defined(POLARSSL_AES_C)
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case POLARSSL_CIPHER_AES_128_CBC:
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return &aes_128_cbc_info;
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case POLARSSL_CIPHER_AES_192_CBC:
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return &aes_192_cbc_info;
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case POLARSSL_CIPHER_AES_256_CBC:
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return &aes_256_cbc_info;
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const cipher_definition_t *def;
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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case POLARSSL_CIPHER_AES_128_CFB128:
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return &aes_128_cfb128_info;
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case POLARSSL_CIPHER_AES_192_CFB128:
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return &aes_192_cfb128_info;
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case POLARSSL_CIPHER_AES_256_CFB128:
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return &aes_256_cfb128_info;
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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for( def = cipher_definitions; def->info != NULL; def++ )
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if( def->type == cipher_type )
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return( def->info );
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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case POLARSSL_CIPHER_AES_128_CTR:
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return &aes_128_ctr_info;
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case POLARSSL_CIPHER_AES_192_CTR:
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return &aes_192_ctr_info;
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case POLARSSL_CIPHER_AES_256_CTR:
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return &aes_256_ctr_info;
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif
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#if defined(POLARSSL_CAMELLIA_C)
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case POLARSSL_CIPHER_CAMELLIA_128_CBC:
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return &camellia_128_cbc_info;
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case POLARSSL_CIPHER_CAMELLIA_192_CBC:
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return &camellia_192_cbc_info;
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case POLARSSL_CIPHER_CAMELLIA_256_CBC:
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return &camellia_256_cbc_info;
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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case POLARSSL_CIPHER_CAMELLIA_128_CFB128:
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return &camellia_128_cfb128_info;
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case POLARSSL_CIPHER_CAMELLIA_192_CFB128:
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return &camellia_192_cfb128_info;
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case POLARSSL_CIPHER_CAMELLIA_256_CFB128:
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return &camellia_256_cfb128_info;
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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case POLARSSL_CIPHER_CAMELLIA_128_CTR:
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return &camellia_128_ctr_info;
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case POLARSSL_CIPHER_CAMELLIA_192_CTR:
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return &camellia_192_ctr_info;
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case POLARSSL_CIPHER_CAMELLIA_256_CTR:
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return &camellia_256_ctr_info;
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif
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#if defined(POLARSSL_DES_C)
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case POLARSSL_CIPHER_DES_CBC:
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return &des_cbc_info;
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case POLARSSL_CIPHER_DES_EDE_CBC:
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return &des_ede_cbc_info;
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case POLARSSL_CIPHER_DES_EDE3_CBC:
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return &des_ede3_cbc_info;
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#endif
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#if defined(POLARSSL_BLOWFISH_C)
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case POLARSSL_CIPHER_BLOWFISH_CBC:
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return &blowfish_cbc_info;
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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case POLARSSL_CIPHER_BLOWFISH_CFB64:
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return &blowfish_cfb64_info;
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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case POLARSSL_CIPHER_BLOWFISH_CTR:
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return &blowfish_ctr_info;
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif
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#if defined(POLARSSL_CIPHER_NULL_CIPHER)
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case POLARSSL_CIPHER_NULL:
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return &null_cipher_info;
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#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
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default:
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return NULL;
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}
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return NULL;
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}
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const cipher_info_t *cipher_info_from_string( const char *cipher_name )
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{
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const cipher_definition_t *def;
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if( NULL == cipher_name )
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return NULL;
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/* Get the appropriate cipher information */
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#if defined(POLARSSL_CAMELLIA_C)
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if( !strcasecmp( "CAMELLIA-128-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_128_CBC );
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if( !strcasecmp( "CAMELLIA-192-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_192_CBC );
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if( !strcasecmp( "CAMELLIA-256-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_256_CBC );
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for( def = cipher_definitions; def->info != NULL; def++ )
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if( ! strcasecmp( def->info->name, cipher_name ) )
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return( def->info );
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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if( !strcasecmp( "CAMELLIA-128-CFB128", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_128_CFB128 );
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if( !strcasecmp( "CAMELLIA-192-CFB128", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_192_CFB128 );
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if( !strcasecmp( "CAMELLIA-256-CFB128", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_256_CFB128 );
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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return NULL;
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}
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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if( !strcasecmp( "CAMELLIA-128-CTR", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_128_CTR );
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if( !strcasecmp( "CAMELLIA-192-CTR", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_192_CTR );
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if( !strcasecmp( "CAMELLIA-256-CTR", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_CAMELLIA_256_CTR );
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif
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const cipher_info_t *cipher_info_from_values( const cipher_id_t cipher_id,
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int key_length,
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const cipher_mode_t mode )
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{
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const cipher_definition_t *def;
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#if defined(POLARSSL_AES_C)
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if( !strcasecmp( "AES-128-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_128_CBC );
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if( !strcasecmp( "AES-192-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_192_CBC );
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if( !strcasecmp( "AES-256-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_256_CBC );
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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if( !strcasecmp( "AES-128-CFB128", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_128_CFB128 );
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if( !strcasecmp( "AES-192-CFB128", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_192_CFB128 );
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if( !strcasecmp( "AES-256-CFB128", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_256_CFB128 );
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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if( !strcasecmp( "AES-128-CTR", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_128_CTR );
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if( !strcasecmp( "AES-192-CTR", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_192_CTR );
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if( !strcasecmp( "AES-256-CTR", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_AES_256_CTR );
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif
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#if defined(POLARSSL_DES_C)
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if( !strcasecmp( "DES-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_DES_CBC );
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if( !strcasecmp( "DES-EDE-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_DES_EDE_CBC );
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if( !strcasecmp( "DES-EDE3-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_DES_EDE3_CBC );
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#endif
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#if defined(POLARSSL_BLOWFISH_C)
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if( !strcasecmp( "BLOWFISH-CBC", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_BLOWFISH_CBC );
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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if( !strcasecmp( "BLOWFISH-CFB64", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_BLOWFISH_CFB64 );
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#endif /* defined(POLARSSL_CIPHER_MODE_CFB) */
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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if( !strcasecmp( "BLOWFISH-CTR", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_BLOWFISH_CTR );
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#endif /* defined(POLARSSL_CIPHER_MODE_CTR) */
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#endif
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#if defined(POLARSSL_CIPHER_NULL_CIPHER)
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if( !strcasecmp( "NULL", cipher_name ) )
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return cipher_info_from_type( POLARSSL_CIPHER_NULL );
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#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
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for( def = cipher_definitions; def->info != NULL; def++ )
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if( def->info->base->cipher == cipher_id &&
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def->info->key_length == (unsigned) key_length &&
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def->info->mode == mode )
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return( def->info );
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return NULL;
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}
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@ -311,6 +124,17 @@ int cipher_init_ctx( cipher_context_t *ctx, const cipher_info_t *cipher_info )
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ctx->cipher_info = cipher_info;
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#if defined(POLARSSL_CIPHER_MODE_WITH_PADDING)
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/*
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* Ignore possible errors caused by a cipher mode that doesn't use padding
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*/
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#if defined(POLARSSL_CIPHER_PADDING_PKCS7)
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(void) cipher_set_padding_mode( ctx, POLARSSL_PADDING_PKCS7 );
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#else
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(void) cipher_set_padding_mode( ctx, POLARSSL_PADDING_NONE );
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#endif
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#endif /* POLARSSL_CIPHER_MODE_WITH_PADDING */
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return 0;
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}
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@ -330,14 +154,12 @@ int cipher_setkey( cipher_context_t *ctx, const unsigned char *key,
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if( NULL == ctx || NULL == ctx->cipher_info )
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return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
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if( (int) ctx->cipher_info->key_length != key_length )
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return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
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ctx->key_length = key_length;
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ctx->operation = operation;
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#if defined(POLARSSL_CIPHER_NULL_CIPHER)
|
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if( ctx->cipher_info->mode == POLARSSL_MODE_NULL )
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return 0;
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#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
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/*
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* For CFB and CTR mode always use the encryption key schedule
|
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*/
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@ -356,43 +178,112 @@ int cipher_setkey( cipher_context_t *ctx, const unsigned char *key,
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return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
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}
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int cipher_reset( cipher_context_t *ctx, const unsigned char *iv )
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int cipher_set_iv( cipher_context_t *ctx,
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const unsigned char *iv, size_t iv_len )
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{
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size_t actual_iv_size;
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if( NULL == ctx || NULL == ctx->cipher_info || NULL == iv )
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return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
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/* avoid buffer overflow in ctx->iv */
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if( iv_len > POLARSSL_MAX_IV_LENGTH )
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return POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE;
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if( ctx->cipher_info->accepts_variable_iv_size )
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actual_iv_size = iv_len;
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else
|
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{
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actual_iv_size = ctx->cipher_info->iv_size;
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/* avoid reading past the end of input buffer */
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if( actual_iv_size > iv_len )
|
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return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
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}
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memcpy( ctx->iv, iv, actual_iv_size );
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ctx->iv_size = actual_iv_size;
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return 0;
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}
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|
||||
int cipher_reset( cipher_context_t *ctx )
|
||||
{
|
||||
if( NULL == ctx || NULL == ctx->cipher_info )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
ctx->unprocessed_len = 0;
|
||||
|
||||
memcpy( ctx->iv, iv, cipher_get_iv_size( ctx ) );
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_AEAD)
|
||||
int cipher_update_ad( cipher_context_t *ctx,
|
||||
const unsigned char *ad, size_t ad_len )
|
||||
{
|
||||
if( NULL == ctx || NULL == ctx->cipher_info )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
#if defined(POLARSSL_GCM_C)
|
||||
if( POLARSSL_MODE_GCM == ctx->cipher_info->mode )
|
||||
{
|
||||
return gcm_starts( (gcm_context *) ctx->cipher_ctx, ctx->operation,
|
||||
ctx->iv, ctx->iv_size, ad, ad_len );
|
||||
}
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_MODE_AEAD */
|
||||
|
||||
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 )
|
||||
if( NULL == ctx || NULL == ctx->cipher_info || NULL == olen )
|
||||
{
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
}
|
||||
|
||||
*olen = 0;
|
||||
|
||||
#if defined(POLARSSL_CIPHER_NULL_CIPHER)
|
||||
if( ctx->cipher_info->mode == POLARSSL_MODE_NULL )
|
||||
if( ctx->cipher_info->mode == POLARSSL_MODE_ECB )
|
||||
{
|
||||
memcpy( output, input, ilen );
|
||||
if( ilen != cipher_get_block_size( ctx ) )
|
||||
return POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED;
|
||||
|
||||
*olen = ilen;
|
||||
|
||||
if( 0 != ( ret = ctx->cipher_info->base->ecb_func( ctx->cipher_ctx,
|
||||
ctx->operation, input, output ) ) )
|
||||
{
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif /* defined(POLARSSL_CIPHER_NULL_CIPHER) */
|
||||
|
||||
#if defined(POLARSSL_GCM_C)
|
||||
if( ctx->cipher_info->mode == POLARSSL_MODE_GCM )
|
||||
{
|
||||
*olen = ilen;
|
||||
return gcm_update( (gcm_context *) ctx->cipher_ctx, ilen, input,
|
||||
output );
|
||||
}
|
||||
#endif
|
||||
|
||||
if( input == output &&
|
||||
( ctx->unprocessed_len != 0 || ilen % cipher_get_block_size( ctx ) ) )
|
||||
{
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
}
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_CBC)
|
||||
if( ctx->cipher_info->mode == POLARSSL_MODE_CBC )
|
||||
{
|
||||
size_t copy_len = 0;
|
||||
|
||||
/*
|
||||
* If there is not enough data for a full block, cache it.
|
||||
*/
|
||||
@ -459,12 +350,15 @@ int cipher_update( cipher_context_t *ctx, const unsigned char *input, size_t ile
|
||||
{
|
||||
return ret;
|
||||
}
|
||||
|
||||
*olen += ilen;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_MODE_CBC */
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_CFB)
|
||||
if( ctx->cipher_info->mode == POLARSSL_MODE_CFB )
|
||||
{
|
||||
if( 0 != ( ret = ctx->cipher_info->base->cfb_func( ctx->cipher_ctx,
|
||||
@ -478,7 +372,9 @@ int cipher_update( cipher_context_t *ctx, const unsigned char *input, size_t ile
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_CTR)
|
||||
if( ctx->cipher_info->mode == POLARSSL_MODE_CTR )
|
||||
{
|
||||
if( 0 != ( ret = ctx->cipher_info->base->ctr_func( ctx->cipher_ctx,
|
||||
@ -492,46 +388,201 @@ int cipher_update( cipher_context_t *ctx, const unsigned char *input, size_t ile
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_STREAM)
|
||||
if( ctx->cipher_info->mode == POLARSSL_MODE_STREAM )
|
||||
{
|
||||
if( 0 != ( ret = ctx->cipher_info->base->stream_func( ctx->cipher_ctx,
|
||||
ilen, input, output ) ) )
|
||||
{
|
||||
return ret;
|
||||
}
|
||||
|
||||
*olen = ilen;
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
return POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE;
|
||||
}
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_WITH_PADDING)
|
||||
#if defined(POLARSSL_CIPHER_PADDING_PKCS7)
|
||||
/*
|
||||
* PKCS7 (and PKCS5) padding: fill with ll bytes, with ll = padding_len
|
||||
*/
|
||||
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;
|
||||
unsigned char i;
|
||||
|
||||
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)
|
||||
static int get_pkcs_padding( unsigned char *input, size_t input_len,
|
||||
size_t *data_len )
|
||||
{
|
||||
unsigned int i, padding_len = 0;
|
||||
size_t i, pad_idx;
|
||||
unsigned char padding_len, bad = 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;
|
||||
|
||||
/* Avoid logical || since it results in a branch */
|
||||
bad |= padding_len > input_len;
|
||||
bad |= padding_len == 0;
|
||||
|
||||
/* The number of bytes checked must be independent of padding_len,
|
||||
* so pick input_len, which is usually 8 or 16 (one block) */
|
||||
pad_idx = input_len - padding_len;
|
||||
for( i = 0; i < input_len; i++ )
|
||||
bad |= ( input[i] ^ padding_len ) * ( i >= pad_idx );
|
||||
|
||||
return POLARSSL_ERR_CIPHER_INVALID_PADDING * (bad != 0);
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_PADDING_PKCS7 */
|
||||
|
||||
#if defined(POLARSSL_CIPHER_PADDING_ONE_AND_ZEROS)
|
||||
/*
|
||||
* One and zeros padding: fill with 80 00 ... 00
|
||||
*/
|
||||
static void add_one_and_zeros_padding( unsigned char *output,
|
||||
size_t output_len, size_t data_len )
|
||||
{
|
||||
size_t padding_len = output_len - data_len;
|
||||
unsigned char i = 0;
|
||||
|
||||
output[data_len] = 0x80;
|
||||
for( i = 1; i < padding_len; i++ )
|
||||
output[data_len + i] = 0x00;
|
||||
}
|
||||
|
||||
static int get_one_and_zeros_padding( unsigned char *input, size_t input_len,
|
||||
size_t *data_len )
|
||||
{
|
||||
size_t i;
|
||||
unsigned char done = 0, prev_done, bad;
|
||||
|
||||
if( NULL == input || NULL == data_len )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
bad = 0xFF;
|
||||
*data_len = 0;
|
||||
for( i = input_len; i > 0; i-- )
|
||||
{
|
||||
prev_done = done;
|
||||
done |= ( input[i-1] != 0 );
|
||||
*data_len |= ( i - 1 ) * ( done != prev_done );
|
||||
bad &= ( input[i-1] ^ 0x80 ) | ( done == prev_done );
|
||||
}
|
||||
|
||||
return POLARSSL_ERR_CIPHER_INVALID_PADDING * (bad != 0);
|
||||
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_PADDING_ONE_AND_ZEROS */
|
||||
|
||||
#if defined(POLARSSL_CIPHER_PADDING_ZEROS_AND_LEN)
|
||||
/*
|
||||
* Zeros and len padding: fill with 00 ... 00 ll, where ll is padding length
|
||||
*/
|
||||
static void add_zeros_and_len_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 = 1; i < padding_len; i++ )
|
||||
output[data_len + i - 1] = 0x00;
|
||||
output[output_len - 1] = (unsigned char) padding_len;
|
||||
}
|
||||
|
||||
static int get_zeros_and_len_padding( unsigned char *input, size_t input_len,
|
||||
size_t *data_len )
|
||||
{
|
||||
size_t i, pad_idx;
|
||||
unsigned char padding_len, bad = 0;
|
||||
|
||||
if( NULL == input || NULL == data_len )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
padding_len = input[input_len - 1];
|
||||
*data_len = input_len - padding_len;
|
||||
|
||||
/* Avoid logical || since it results in a branch */
|
||||
bad |= padding_len > input_len;
|
||||
bad |= padding_len == 0;
|
||||
|
||||
/* The number of bytes checked must be independent of padding_len */
|
||||
pad_idx = input_len - padding_len;
|
||||
for( i = 0; i < input_len - 1; i++ )
|
||||
bad |= input[i] * ( i >= pad_idx );
|
||||
|
||||
return POLARSSL_ERR_CIPHER_INVALID_PADDING * (bad != 0);
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_PADDING_ZEROS_AND_LEN */
|
||||
|
||||
#if defined(POLARSSL_CIPHER_PADDING_ZEROS)
|
||||
/*
|
||||
* Zero padding: fill with 00 ... 00
|
||||
*/
|
||||
static void add_zeros_padding( unsigned char *output,
|
||||
size_t output_len, size_t data_len )
|
||||
{
|
||||
size_t i;
|
||||
|
||||
for( i = data_len; i < output_len; i++ )
|
||||
output[i] = 0x00;
|
||||
}
|
||||
|
||||
static int get_zeros_padding( unsigned char *input, size_t input_len,
|
||||
size_t *data_len )
|
||||
{
|
||||
size_t i;
|
||||
unsigned char done = 0, prev_done;
|
||||
|
||||
if( NULL == input || NULL == data_len )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
*data_len = 0;
|
||||
for( i = input_len; i > 0; i-- )
|
||||
{
|
||||
prev_done = done;
|
||||
done |= ( input[i-1] != 0 );
|
||||
*data_len |= i * ( done != prev_done );
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_PADDING_ZEROS */
|
||||
|
||||
int cipher_finish( cipher_context_t *ctx, unsigned char *output, size_t *olen)
|
||||
/*
|
||||
* No padding: don't pad :)
|
||||
*
|
||||
* There is no add_padding function (check for NULL in cipher_finish)
|
||||
* but a trivial get_padding function
|
||||
*/
|
||||
static int get_no_padding( unsigned char *input, size_t input_len,
|
||||
size_t *data_len )
|
||||
{
|
||||
int ret = 0;
|
||||
if( NULL == input || NULL == data_len )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
*data_len = input_len;
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_MODE_WITH_PADDING */
|
||||
|
||||
int cipher_finish( cipher_context_t *ctx,
|
||||
unsigned char *output, size_t *olen )
|
||||
{
|
||||
if( NULL == ctx || NULL == ctx->cipher_info || NULL == olen )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
@ -539,21 +590,48 @@ int cipher_finish( cipher_context_t *ctx, unsigned char *output, size_t *olen)
|
||||
|
||||
if( POLARSSL_MODE_CFB == ctx->cipher_info->mode ||
|
||||
POLARSSL_MODE_CTR == ctx->cipher_info->mode ||
|
||||
POLARSSL_MODE_NULL == ctx->cipher_info->mode )
|
||||
POLARSSL_MODE_GCM == ctx->cipher_info->mode ||
|
||||
POLARSSL_MODE_STREAM == ctx->cipher_info->mode )
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
if( POLARSSL_MODE_ECB == ctx->cipher_info->mode )
|
||||
{
|
||||
if( ctx->unprocessed_len != 0 )
|
||||
return POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_CBC)
|
||||
if( POLARSSL_MODE_CBC == ctx->cipher_info->mode )
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
if( POLARSSL_ENCRYPT == ctx->operation )
|
||||
{
|
||||
add_pkcs_padding( ctx->unprocessed_data, cipher_get_iv_size( ctx ),
|
||||
/* check for 'no padding' mode */
|
||||
if( NULL == ctx->add_padding )
|
||||
{
|
||||
if( 0 != ctx->unprocessed_len )
|
||||
return POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
ctx->add_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 */
|
||||
/*
|
||||
* For decrypt operations, expect a full block,
|
||||
* or an empty block if no padding
|
||||
*/
|
||||
if( NULL == ctx->add_padding && 0 == ctx->unprocessed_len )
|
||||
return 0;
|
||||
|
||||
return POLARSSL_ERR_CIPHER_FULL_BLOCK_EXPECTED;
|
||||
}
|
||||
|
||||
@ -567,16 +645,128 @@ int cipher_finish( cipher_context_t *ctx, unsigned char *output, size_t *olen)
|
||||
|
||||
/* Set output size for decryption */
|
||||
if( POLARSSL_DECRYPT == ctx->operation )
|
||||
return get_pkcs_padding( output, cipher_get_block_size( ctx ), olen );
|
||||
return ctx->get_padding( output, cipher_get_block_size( ctx ),
|
||||
olen );
|
||||
|
||||
/* Set output size for encryption */
|
||||
*olen = cipher_get_block_size( ctx );
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
((void) output);
|
||||
#endif /* POLARSSL_CIPHER_MODE_CBC */
|
||||
|
||||
return POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE;
|
||||
}
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_WITH_PADDING)
|
||||
int cipher_set_padding_mode( cipher_context_t *ctx, cipher_padding_t mode )
|
||||
{
|
||||
if( NULL == ctx ||
|
||||
POLARSSL_MODE_CBC != ctx->cipher_info->mode )
|
||||
{
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
}
|
||||
|
||||
switch( mode )
|
||||
{
|
||||
#if defined(POLARSSL_CIPHER_PADDING_PKCS7)
|
||||
case POLARSSL_PADDING_PKCS7:
|
||||
ctx->add_padding = add_pkcs_padding;
|
||||
ctx->get_padding = get_pkcs_padding;
|
||||
break;
|
||||
#endif
|
||||
#if defined(POLARSSL_CIPHER_PADDING_ONE_AND_ZEROS)
|
||||
case POLARSSL_PADDING_ONE_AND_ZEROS:
|
||||
ctx->add_padding = add_one_and_zeros_padding;
|
||||
ctx->get_padding = get_one_and_zeros_padding;
|
||||
break;
|
||||
#endif
|
||||
#if defined(POLARSSL_CIPHER_PADDING_ZEROS_AND_LEN)
|
||||
case POLARSSL_PADDING_ZEROS_AND_LEN:
|
||||
ctx->add_padding = add_zeros_and_len_padding;
|
||||
ctx->get_padding = get_zeros_and_len_padding;
|
||||
break;
|
||||
#endif
|
||||
#if defined(POLARSSL_CIPHER_PADDING_ZEROS)
|
||||
case POLARSSL_PADDING_ZEROS:
|
||||
ctx->add_padding = add_zeros_padding;
|
||||
ctx->get_padding = get_zeros_padding;
|
||||
break;
|
||||
#endif
|
||||
case POLARSSL_PADDING_NONE:
|
||||
ctx->add_padding = NULL;
|
||||
ctx->get_padding = get_no_padding;
|
||||
break;
|
||||
|
||||
default:
|
||||
return POLARSSL_ERR_CIPHER_FEATURE_UNAVAILABLE;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_MODE_WITH_PADDING */
|
||||
|
||||
#if defined(POLARSSL_CIPHER_MODE_AEAD)
|
||||
int cipher_write_tag( cipher_context_t *ctx,
|
||||
unsigned char *tag, size_t tag_len )
|
||||
{
|
||||
if( NULL == ctx || NULL == ctx->cipher_info || NULL == tag )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
if( POLARSSL_ENCRYPT != ctx->operation )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
#if defined(POLARSSL_GCM_C)
|
||||
if( POLARSSL_MODE_GCM == ctx->cipher_info->mode )
|
||||
return gcm_finish( (gcm_context *) ctx->cipher_ctx, tag, tag_len );
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int cipher_check_tag( cipher_context_t *ctx,
|
||||
const unsigned char *tag, size_t tag_len )
|
||||
{
|
||||
int ret;
|
||||
|
||||
if( NULL == ctx || NULL == ctx->cipher_info ||
|
||||
POLARSSL_DECRYPT != ctx->operation )
|
||||
{
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
}
|
||||
|
||||
#if defined(POLARSSL_GCM_C)
|
||||
if( POLARSSL_MODE_GCM == ctx->cipher_info->mode )
|
||||
{
|
||||
unsigned char check_tag[16];
|
||||
size_t i;
|
||||
int diff;
|
||||
|
||||
if( tag_len > sizeof( check_tag ) )
|
||||
return POLARSSL_ERR_CIPHER_BAD_INPUT_DATA;
|
||||
|
||||
if( 0 != ( ret = gcm_finish( (gcm_context *) ctx->cipher_ctx,
|
||||
check_tag, tag_len ) ) )
|
||||
{
|
||||
return( ret );
|
||||
}
|
||||
|
||||
/* Check the tag in "constant-time" */
|
||||
for( diff = 0, i = 0; i < tag_len; i++ )
|
||||
diff |= tag[i] ^ check_tag[i];
|
||||
|
||||
if( diff != 0 )
|
||||
return( POLARSSL_ERR_CIPHER_AUTH_FAILED );
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
#endif
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
#endif /* POLARSSL_CIPHER_MODE_AEAD */
|
||||
|
||||
#if defined(POLARSSL_SELF_TEST)
|
||||
|
||||
#include <stdio.h>
|
||||
|
||||
Reference in New Issue
Block a user