diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/block/des/desx.cpp')
-rw-r--r-- | comm/third_party/botan/src/lib/block/des/desx.cpp | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/block/des/desx.cpp b/comm/third_party/botan/src/lib/block/des/desx.cpp new file mode 100644 index 0000000000..e869b3ebf8 --- /dev/null +++ b/comm/third_party/botan/src/lib/block/des/desx.cpp @@ -0,0 +1,65 @@ +/* +* DES +* (C) 1999-2007 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#include <botan/desx.h> + +namespace Botan { + +/* +* DESX Encryption +*/ +void DESX::encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const + { + verify_key_set(m_K1.empty() == false); + + for(size_t i = 0; i != blocks; ++i) + { + xor_buf(out, in, m_K1.data(), BLOCK_SIZE); + m_des.encrypt(out); + xor_buf(out, m_K2.data(), BLOCK_SIZE); + + in += BLOCK_SIZE; + out += BLOCK_SIZE; + } + } + +/* +* DESX Decryption +*/ +void DESX::decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const + { + verify_key_set(m_K1.empty() == false); + + for(size_t i = 0; i != blocks; ++i) + { + xor_buf(out, in, m_K2.data(), BLOCK_SIZE); + m_des.decrypt(out); + xor_buf(out, m_K1.data(), BLOCK_SIZE); + + in += BLOCK_SIZE; + out += BLOCK_SIZE; + } + } + +/* +* DESX Key Schedule +*/ +void DESX::key_schedule(const uint8_t key[], size_t) + { + m_K1.assign(key, key + 8); + m_des.set_key(key + 8, 8); + m_K2.assign(key + 16, key + 24); + } + +void DESX::clear() + { + m_des.clear(); + zap(m_K1); + zap(m_K2); + } + +} |