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Diffstat (limited to 'CryptoPP/3way.cpp')
-rw-r--r-- | CryptoPP/3way.cpp | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/CryptoPP/3way.cpp b/CryptoPP/3way.cpp deleted file mode 100644 index 725b682ea..000000000 --- a/CryptoPP/3way.cpp +++ /dev/null @@ -1,139 +0,0 @@ -// 3way.cpp - modifed by Wei Dai from Joan Daemen's 3way.c -// The original code and all modifications are in the public domain. - -#include "pch.h" -#include "3way.h" -#include "misc.h" - -NAMESPACE_BEGIN(CryptoPP) - -void ThreeWay_TestInstantiations() -{ - ThreeWay::Encryption x1; - ThreeWay::Decryption x2; -} - -static const word32 START_E = 0x0b0b; // round constant of first encryption round -static const word32 START_D = 0xb1b1; // round constant of first decryption round -static const word32 RC_MODULUS = 0x11011; - -static inline word32 reverseBits(word32 a) -{ - a = ((a & 0xAAAAAAAA) >> 1) | ((a & 0x55555555) << 1); - a = ((a & 0xCCCCCCCC) >> 2) | ((a & 0x33333333) << 2); - return ((a & 0xF0F0F0F0) >> 4) | ((a & 0x0F0F0F0F) << 4); -} - -#define mu(a0, a1, a2) \ -{ \ - a1 = reverseBits(a1); \ - word32 t = reverseBits(a0); \ - a0 = reverseBits(a2); \ - a2 = t; \ -} - -#define pi_gamma_pi(a0, a1, a2) \ -{ \ - word32 b0, b2; \ - b2 = rotlFixed(a2, 1U); \ - b0 = rotlFixed(a0, 22U); \ - a0 = rotlFixed(b0 ^ (a1|(~b2)), 1U); \ - a2 = rotlFixed(b2 ^ (b0|(~a1)), 22U);\ - a1 ^= (b2|(~b0)); \ -} - -// thanks to Paulo Barreto for this optimized theta() -#define theta(a0, a1, a2) \ -{ \ - word32 b0, b1, c; \ - c = a0 ^ a1 ^ a2; \ - c = rotlFixed(c, 16U) ^ rotlFixed(c, 8U); \ - b0 = (a0 << 24) ^ (a2 >> 8) ^ (a1 << 8) ^ (a0 >> 24); \ - b1 = (a1 << 24) ^ (a0 >> 8) ^ (a2 << 8) ^ (a1 >> 24); \ - a0 ^= c ^ b0; \ - a1 ^= c ^ b1; \ - a2 ^= c ^ (b0 >> 16) ^ (b1 << 16); \ -} - -#define rho(a0, a1, a2) \ -{ \ - theta(a0, a1, a2); \ - pi_gamma_pi(a0, a1, a2); \ -} - -void ThreeWay::Base::UncheckedSetKey(const byte *uk, unsigned int length, const NameValuePairs ¶ms) -{ - AssertValidKeyLength(length); - - m_rounds = GetRoundsAndThrowIfInvalid(params, this); - - for (unsigned int i=0; i<3; i++) - m_k[i] = (word32)uk[4*i+3] | ((word32)uk[4*i+2]<<8) | ((word32)uk[4*i+1]<<16) | ((word32)uk[4*i]<<24); - - if (!IsForwardTransformation()) - { - theta(m_k[0], m_k[1], m_k[2]); - mu(m_k[0], m_k[1], m_k[2]); - m_k[0] = ByteReverse(m_k[0]); - m_k[1] = ByteReverse(m_k[1]); - m_k[2] = ByteReverse(m_k[2]); - } -} - -void ThreeWay::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - typedef BlockGetAndPut<word32, BigEndian> Block; - - word32 a0, a1, a2; - Block::Get(inBlock)(a0)(a1)(a2); - - word32 rc = START_E; - - for(unsigned i=0; i<m_rounds; i++) - { - a0 ^= m_k[0] ^ (rc<<16); - a1 ^= m_k[1]; - a2 ^= m_k[2] ^ rc; - rho(a0, a1, a2); - - rc <<= 1; - if (rc&0x10000) rc ^= 0x11011; - } - a0 ^= m_k[0] ^ (rc<<16); - a1 ^= m_k[1]; - a2 ^= m_k[2] ^ rc; - theta(a0, a1, a2); - - Block::Put(xorBlock, outBlock)(a0)(a1)(a2); -} - -void ThreeWay::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - typedef BlockGetAndPut<word32, LittleEndian> Block; - - word32 a0, a1, a2; - Block::Get(inBlock)(a0)(a1)(a2); - - word32 rc = START_D; - - mu(a0, a1, a2); - for(unsigned i=0; i<m_rounds; i++) - { - a0 ^= m_k[0] ^ (rc<<16); - a1 ^= m_k[1]; - a2 ^= m_k[2] ^ rc; - rho(a0, a1, a2); - - rc <<= 1; - if (rc&0x10000) rc ^= 0x11011; - } - a0 ^= m_k[0] ^ (rc<<16); - a1 ^= m_k[1]; - a2 ^= m_k[2] ^ rc; - theta(a0, a1, a2); - mu(a0, a1, a2); - - Block::Put(xorBlock, outBlock)(a0)(a1)(a2); -} - -NAMESPACE_END |