diff options
Diffstat (limited to 'botan/src/engine/def_engine/def_mode.cpp')
| -rw-r--r-- | botan/src/engine/def_engine/def_mode.cpp | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/botan/src/engine/def_engine/def_mode.cpp b/botan/src/engine/def_engine/def_mode.cpp deleted file mode 100644 index 2b093a0..0000000 --- a/botan/src/engine/def_engine/def_mode.cpp +++ /dev/null @@ -1,209 +0,0 @@ -/* -* Default Engine -* (C) 1999-2007 Jack Lloyd -* -* Distributed under the terms of the Botan license -*/ - -#include <botan/def_eng.h> -#include <botan/parsing.h> -#include <botan/filters.h> -#include <botan/algo_factory.h> -#include <botan/mode_pad.h> -#include <memory> - -#if defined(BOTAN_HAS_ECB) - #include <botan/ecb.h> -#endif - -#if defined(BOTAN_HAS_CBC) - #include <botan/cbc.h> -#endif - -#if defined(BOTAN_HAS_CTS) - #include <botan/cts.h> -#endif - -#if defined(BOTAN_HAS_CFB) - #include <botan/cfb.h> -#endif - -#if defined(BOTAN_HAS_OFB) - #include <botan/ofb.h> -#endif - -#if defined(BOTAN_HAS_CTR) - #include <botan/ctr.h> -#endif - -#if defined(BOTAN_HAS_EAX) - #include <botan/eax.h> -#endif - -#if defined(BOTAN_HAS_XTS) - #include <botan/xts.h> -#endif - -namespace Botan { - -namespace { - -/** -* Get a block cipher padding method by name -*/ -BlockCipherModePaddingMethod* get_bc_pad(const std::string& algo_spec) - { - SCAN_Name request(algo_spec); - -#if defined(BOTAN_HAS_CIPHER_MODE_PADDING) - if(request.algo_name() == "PKCS7") - return new PKCS7_Padding; - - if(request.algo_name() == "OneAndZeros") - return new OneAndZeros_Padding; - - if(request.algo_name() == "X9.23") - return new ANSI_X923_Padding; - - if(request.algo_name() == "NoPadding") - return new Null_Padding; -#endif - - throw Algorithm_Not_Found(algo_spec); - } - -} - -/* -* Get a cipher object -*/ -Keyed_Filter* Default_Engine::get_cipher(const std::string& algo_spec, - Cipher_Dir direction, - Algorithm_Factory& af) - { - std::vector<std::string> algo_parts = split_on(algo_spec, '/'); - if(algo_parts.empty()) - throw Invalid_Algorithm_Name(algo_spec); - - const std::string cipher_name = algo_parts[0]; - - // check if it is a stream cipher first (easy case) - const StreamCipher* stream_cipher = af.prototype_stream_cipher(cipher_name); - if(stream_cipher) - return new StreamCipher_Filter(stream_cipher->clone()); - - const BlockCipher* block_cipher = af.prototype_block_cipher(cipher_name); - if(!block_cipher) - return 0; - - if(algo_parts.size() != 2 && algo_parts.size() != 3) - return 0; - - std::string mode = algo_parts[1]; - u32bit bits = 0; - - if(mode.find("CFB") != std::string::npos || - mode.find("EAX") != std::string::npos) - { - std::vector<std::string> algo_info = parse_algorithm_name(mode); - mode = algo_info[0]; - if(algo_info.size() == 1) - bits = 8*block_cipher->BLOCK_SIZE; - else if(algo_info.size() == 2) - bits = to_u32bit(algo_info[1]); - else - throw Invalid_Algorithm_Name(algo_spec); - } - - std::string padding; - if(algo_parts.size() == 3) - padding = algo_parts[2]; - else - padding = (mode == "CBC") ? "PKCS7" : "NoPadding"; - - if(mode == "ECB" && padding == "CTS") - return 0; - else if((mode != "CBC" && mode != "ECB") && padding != "NoPadding") - throw Invalid_Algorithm_Name(algo_spec); - -#if defined(BOTAN_HAS_OFB) - if(mode == "OFB") - return new OFB(block_cipher->clone()); -#endif - -#if defined(BOTAN_HAS_CTR) - if(mode == "CTR-BE") - return new CTR_BE(block_cipher->clone()); -#endif - -#if defined(BOTAN_HAS_ECB) - if(mode == "ECB") - { - if(direction == ENCRYPTION) - return new ECB_Encryption(block_cipher->clone(), get_bc_pad(padding)); - else - return new ECB_Decryption(block_cipher->clone(), get_bc_pad(padding)); - } -#endif - -#if defined(BOTAN_HAS_CFB) - if(mode == "CFB") - { - if(direction == ENCRYPTION) - return new CFB_Encryption(block_cipher->clone(), bits); - else - return new CFB_Decryption(block_cipher->clone(), bits); - } -#endif - - if(mode == "CBC") - { - if(padding == "CTS") - { -#if defined(BOTAN_HAS_CTS) - if(direction == ENCRYPTION) - return new CTS_Encryption(block_cipher->clone()); - else - return new CTS_Decryption(block_cipher->clone()); -#else - return 0; -#endif - } - -#if defined(BOTAN_HAS_CBC) - if(direction == ENCRYPTION) - return new CBC_Encryption(block_cipher->clone(), - get_bc_pad(padding)); - else - return new CBC_Decryption(block_cipher->clone(), - get_bc_pad(padding)); -#else - return 0; -#endif - } - -#if defined(BOTAN_HAS_EAX) - if(mode == "EAX") - { - if(direction == ENCRYPTION) - return new EAX_Encryption(block_cipher->clone(), bits); - else - return new EAX_Decryption(block_cipher->clone(), bits); - } -#endif - -#if defined(BOTAN_HAS_XTS) - if(mode == "XTS") - { - if(direction == ENCRYPTION) - return new XTS_Encryption(block_cipher->clone()); - else - return new XTS_Decryption(block_cipher->clone()); - } -#endif - - throw Algorithm_Not_Found("get_mode: " + cipher_name + "/" + - mode + "/" + padding); - } - -} |