diff options
Diffstat (limited to 'src/engine/def_engine')
| -rw-r--r-- | src/engine/def_engine/def_eng.h | 5 | ||||
| -rw-r--r-- | src/engine/def_engine/def_mode.cpp | 183 | ||||
| -rw-r--r-- | src/engine/def_engine/lookup_hash.cpp | 9 |
3 files changed, 113 insertions, 84 deletions
diff --git a/src/engine/def_engine/def_eng.h b/src/engine/def_engine/def_eng.h index 2d7145480..ba5bee8ef 100644 --- a/src/engine/def_engine/def_eng.h +++ b/src/engine/def_engine/def_eng.h @@ -78,6 +78,11 @@ class BOTAN_DLL Default_Engine : public Engine Algorithm_Factory&) const; }; +Keyed_Filter* get_cipher_mode(const BlockCipher* block_cipher, + Cipher_Dir direction, + const std::string& mode, + const std::string& padding); + } #endif diff --git a/src/engine/def_engine/def_mode.cpp b/src/engine/def_engine/def_mode.cpp index 2b093a0a3..0c7a1a2e2 100644 --- a/src/engine/def_engine/def_mode.cpp +++ b/src/engine/def_engine/def_mode.cpp @@ -51,22 +51,22 @@ namespace { /** * Get a block cipher padding method by name */ -BlockCipherModePaddingMethod* get_bc_pad(const std::string& algo_spec) +BlockCipherModePaddingMethod* get_bc_pad(const std::string& algo_spec, + const std::string& def_if_empty) { - SCAN_Name request(algo_spec); - #if defined(BOTAN_HAS_CIPHER_MODE_PADDING) - if(request.algo_name() == "PKCS7") + if(algo_spec == "NoPadding" || (algo_spec == "" && def_if_empty == "NoPadding")) + return new Null_Padding; + + if(algo_spec == "PKCS7" || (algo_spec == "" && def_if_empty == "PKCS7")) return new PKCS7_Padding; - if(request.algo_name() == "OneAndZeros") + if(algo_spec == "OneAndZeros") return new OneAndZeros_Padding; - if(request.algo_name() == "X9.23") + if(algo_spec == "X9.23") return new ANSI_X923_Padding; - if(request.algo_name() == "NoPadding") - return new Null_Padding; #endif throw Algorithm_Not_Found(algo_spec); @@ -74,58 +74,11 @@ BlockCipherModePaddingMethod* get_bc_pad(const std::string& algo_spec) } -/* -* Get a cipher object -*/ -Keyed_Filter* Default_Engine::get_cipher(const std::string& algo_spec, - Cipher_Dir direction, - Algorithm_Factory& af) +Keyed_Filter* get_cipher_mode(const BlockCipher* block_cipher, + Cipher_Dir direction, + const std::string& mode, + const std::string& padding) { - 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()); @@ -137,22 +90,14 @@ Keyed_Filter* Default_Engine::get_cipher(const std::string& algo_spec, #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(mode == "ECB" || mode == "") { if(direction == ENCRYPTION) - return new CFB_Encryption(block_cipher->clone(), bits); + return new ECB_Encryption(block_cipher->clone(), + get_bc_pad(padding, "NoPadding")); else - return new CFB_Decryption(block_cipher->clone(), bits); + return new ECB_Decryption(block_cipher->clone(), + get_bc_pad(padding, "NoPadding")); } #endif @@ -173,25 +118,15 @@ Keyed_Filter* Default_Engine::get_cipher(const std::string& algo_spec, #if defined(BOTAN_HAS_CBC) if(direction == ENCRYPTION) return new CBC_Encryption(block_cipher->clone(), - get_bc_pad(padding)); + get_bc_pad(padding, "PKCS7")); else return new CBC_Decryption(block_cipher->clone(), - get_bc_pad(padding)); + get_bc_pad(padding, "PKCS7")); #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") { @@ -202,6 +137,86 @@ Keyed_Filter* Default_Engine::get_cipher(const std::string& algo_spec, } #endif + if(mode.find("CFB") != std::string::npos || + mode.find("EAX") != std::string::npos) + { + u32bit bits = 0; + + std::vector<std::string> algo_info = parse_algorithm_name(mode); + std::string mode_name = 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 + return 0; + +#if defined(BOTAN_HAS_CFB) + if(mode_name == "CFB") + { + if(direction == ENCRYPTION) + return new CFB_Encryption(block_cipher->clone(), bits); + else + return new CFB_Decryption(block_cipher->clone(), bits); + } +#endif + +#if defined(BOTAN_HAS_EAX) + if(mode_name == "EAX") + { + if(direction == ENCRYPTION) + return new EAX_Encryption(block_cipher->clone(), bits); + else + return new EAX_Decryption(block_cipher->clone(), bits); + } +#endif + } + + return 0; + } + +/* +* 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]; + + 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); + + Keyed_Filter* filt = get_cipher_mode(block_cipher, direction, mode, padding); + if(filt) + return filt; + throw Algorithm_Not_Found("get_mode: " + cipher_name + "/" + mode + "/" + padding); } diff --git a/src/engine/def_engine/lookup_hash.cpp b/src/engine/def_engine/lookup_hash.cpp index 58136fc5a..9b2018736 100644 --- a/src/engine/def_engine/lookup_hash.cpp +++ b/src/engine/def_engine/lookup_hash.cpp @@ -22,6 +22,10 @@ #include <botan/crc32.h> #endif +#if defined(BOTAN_HAS_BMW_512) + #include <botan/bmw_512.h> +#endif + #if defined(BOTAN_HAS_FORK_256) #include <botan/fork256.h> #endif @@ -103,6 +107,11 @@ Default_Engine::find_hash(const SCAN_Name& request, return new CRC32; #endif +#if defined(BOTAN_HAS_BMW_512) + if(request.algo_name() == "BMW-512") + return new BMW_512; +#endif + #if defined(BOTAN_HAS_FORK_256) if(request.algo_name() == "FORK-256") return new FORK_256; |