diff options
author | Jack Lloyd <[email protected]> | 2016-07-17 11:42:53 -0400 |
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committer | Jack Lloyd <[email protected]> | 2016-09-02 05:28:10 -0400 |
commit | 1c0bc3cc6bcbd6318d8ae33d0442ffd24302a044 (patch) | |
tree | da27a2597938f5b5edd1bd43f4d3d0e3c978e8be /src/lib/block/rc5/rc5.cpp | |
parent | cd9f852b46f62087dcf7940303a0fe52a009e6c7 (diff) |
Remove deprecated ciphers MARS, RC2, RC5, RC6, SAFER-SK and TEA
XTEA was also deprecated but has been spared, it does seem to be somewhat
common (eg, included in the Go x/crypto library)
Diffstat (limited to 'src/lib/block/rc5/rc5.cpp')
-rw-r--r-- | src/lib/block/rc5/rc5.cpp | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/src/lib/block/rc5/rc5.cpp b/src/lib/block/rc5/rc5.cpp deleted file mode 100644 index a02a45e9f..000000000 --- a/src/lib/block/rc5/rc5.cpp +++ /dev/null @@ -1,133 +0,0 @@ -/* -* RC5 -* (C) 1999-2007 Jack Lloyd -* -* Botan is released under the Simplified BSD License (see license.txt) -*/ - -#include <botan/rc5.h> -#include <botan/loadstor.h> -#include <botan/parsing.h> - -namespace Botan { - -/* -* RC5 Encryption -*/ -void RC5::encrypt_n(const byte in[], byte out[], size_t blocks) const - { - for(size_t i = 0; i != blocks; ++i) - { - u32bit A = load_le<u32bit>(in, 0); - u32bit B = load_le<u32bit>(in, 1); - - A += m_S[0]; B += m_S[1]; - for(size_t j = 0; j != m_rounds; j += 4) - { - A = rotate_left(A ^ B, B % 32) + m_S[2*j+2]; - B = rotate_left(B ^ A, A % 32) + m_S[2*j+3]; - - A = rotate_left(A ^ B, B % 32) + m_S[2*j+4]; - B = rotate_left(B ^ A, A % 32) + m_S[2*j+5]; - - A = rotate_left(A ^ B, B % 32) + m_S[2*j+6]; - B = rotate_left(B ^ A, A % 32) + m_S[2*j+7]; - - A = rotate_left(A ^ B, B % 32) + m_S[2*j+8]; - B = rotate_left(B ^ A, A % 32) + m_S[2*j+9]; - } - - store_le(out, A, B); - - in += BLOCK_SIZE; - out += BLOCK_SIZE; - } - } - -/* -* RC5 Decryption -*/ -void RC5::decrypt_n(const byte in[], byte out[], size_t blocks) const - { - for(size_t i = 0; i != blocks; ++i) - { - u32bit A = load_le<u32bit>(in, 0); - u32bit B = load_le<u32bit>(in, 1); - - for(size_t j = m_rounds; j != 0; j -= 4) - { - B = rotate_right(B - m_S[2*j+1], A % 32) ^ A; - A = rotate_right(A - m_S[2*j ], B % 32) ^ B; - - B = rotate_right(B - m_S[2*j-1], A % 32) ^ A; - A = rotate_right(A - m_S[2*j-2], B % 32) ^ B; - - B = rotate_right(B - m_S[2*j-3], A % 32) ^ A; - A = rotate_right(A - m_S[2*j-4], B % 32) ^ B; - - B = rotate_right(B - m_S[2*j-5], A % 32) ^ A; - A = rotate_right(A - m_S[2*j-6], B % 32) ^ B; - } - B -= m_S[1]; A -= m_S[0]; - - store_le(out, A, B); - - in += BLOCK_SIZE; - out += BLOCK_SIZE; - } - } - -/* -* RC5 Key Schedule -*/ -void RC5::key_schedule(const byte key[], size_t length) - { - m_S.resize(2*m_rounds + 2); - - const size_t WORD_KEYLENGTH = (((length - 1) / 4) + 1); - const size_t MIX_ROUNDS = 3 * std::max(WORD_KEYLENGTH, m_S.size()); - - m_S[0] = 0xB7E15163; - for(size_t i = 1; i != m_S.size(); ++i) - m_S[i] = m_S[i-1] + 0x9E3779B9; - - secure_vector<u32bit> K(8); - - for(s32bit i = length-1; i >= 0; --i) - K[i/4] = (K[i/4] << 8) + key[i]; - - u32bit A = 0, B = 0; - - for(size_t i = 0; i != MIX_ROUNDS; ++i) - { - A = rotate_left(m_S[i % m_S.size()] + A + B, 3); - B = rotate_left(K[i % WORD_KEYLENGTH] + A + B, (A + B) % 32); - m_S[i % m_S.size()] = A; - K[i % WORD_KEYLENGTH] = B; - } - } - -void RC5::clear() - { - zap(m_S); - } - -/* -* Return the name of this type -*/ -std::string RC5::name() const - { - return "RC5(" + std::to_string(m_rounds) + ")"; - } - -/* -* RC5 Constructor -*/ -RC5::RC5(size_t r) : m_rounds(r) - { - if(m_rounds < 8 || m_rounds > 32 || (m_rounds % 4 != 0)) - throw Invalid_Argument("RC5: Invalid number of rounds " + - std::to_string(m_rounds)); - } - -} |