diff options
Diffstat (limited to 'lib/cryptopp/tea.cpp')
| -rw-r--r-- | lib/cryptopp/tea.cpp | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/lib/cryptopp/tea.cpp b/lib/cryptopp/tea.cpp deleted file mode 100644 index b1fb6f140..000000000 --- a/lib/cryptopp/tea.cpp +++ /dev/null @@ -1,159 +0,0 @@ -// tea.cpp - modified by Wei Dai from code in the original paper - -#include "pch.h" -#include "tea.h" -#include "misc.h" - -NAMESPACE_BEGIN(CryptoPP) - -static const word32 DELTA = 0x9e3779b9; -typedef BlockGetAndPut<word32, BigEndian> Block; - -void TEA::Base::UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms) -{ - AssertValidKeyLength(length); - - GetUserKey(BIG_ENDIAN_ORDER, m_k.begin(), 4, userKey, KEYLENGTH); - m_limit = GetRoundsAndThrowIfInvalid(params, this) * DELTA; -} - -void TEA::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - word32 y, z; - Block::Get(inBlock)(y)(z); - - word32 sum = 0; - while (sum != m_limit) - { - sum += DELTA; - y += (z << 4) + m_k[0] ^ z + sum ^ (z >> 5) + m_k[1]; - z += (y << 4) + m_k[2] ^ y + sum ^ (y >> 5) + m_k[3]; - } - - Block::Put(xorBlock, outBlock)(y)(z); -} - -void TEA::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - word32 y, z; - Block::Get(inBlock)(y)(z); - - word32 sum = m_limit; - while (sum != 0) - { - z -= (y << 4) + m_k[2] ^ y + sum ^ (y >> 5) + m_k[3]; - y -= (z << 4) + m_k[0] ^ z + sum ^ (z >> 5) + m_k[1]; - sum -= DELTA; - } - - Block::Put(xorBlock, outBlock)(y)(z); -} - -void XTEA::Base::UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms) -{ - AssertValidKeyLength(length); - - GetUserKey(BIG_ENDIAN_ORDER, m_k.begin(), 4, userKey, KEYLENGTH); - m_limit = GetRoundsAndThrowIfInvalid(params, this) * DELTA; -} - -void XTEA::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - word32 y, z; - Block::Get(inBlock)(y)(z); - -#ifdef __SUNPRO_CC - // workaround needed on Sun Studio 12u1 Sun C++ 5.10 SunOS_i386 128229-02 2009/09/21 - size_t sum = 0; - while ((sum&0xffffffff) != m_limit) -#else - word32 sum = 0; - while (sum != m_limit) -#endif - { - y += (z<<4 ^ z>>5) + z ^ sum + m_k[sum&3]; - sum += DELTA; - z += (y<<4 ^ y>>5) + y ^ sum + m_k[sum>>11 & 3]; - } - - Block::Put(xorBlock, outBlock)(y)(z); -} - -void XTEA::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - word32 y, z; - Block::Get(inBlock)(y)(z); - -#ifdef __SUNPRO_CC - // workaround needed on Sun Studio 12u1 Sun C++ 5.10 SunOS_i386 128229-02 2009/09/21 - size_t sum = m_limit; - while ((sum&0xffffffff) != 0) -#else - word32 sum = m_limit; - while (sum != 0) -#endif - { - z -= (y<<4 ^ y>>5) + y ^ sum + m_k[sum>>11 & 3]; - sum -= DELTA; - y -= (z<<4 ^ z>>5) + z ^ sum + m_k[sum&3]; - } - - Block::Put(xorBlock, outBlock)(y)(z); -} - -#define MX (z>>5^y<<2)+(y>>3^z<<4)^(sum^y)+(m_k[p&3^e]^z) - -void BTEA::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - unsigned int n = m_blockSize / 4; - word32 *v = (word32*)outBlock; - ConditionalByteReverse(BIG_ENDIAN_ORDER, v, (const word32*)inBlock, m_blockSize); - - word32 y = v[0], z = v[n-1], e; - word32 p, q = 6+52/n; - word32 sum = 0; - - while (q-- > 0) - { - sum += DELTA; - e = sum>>2 & 3; - for (p = 0; p < n-1; p++) - { - y = v[p+1]; - z = v[p] += MX; - } - y = v[0]; - z = v[n-1] += MX; - } - - ConditionalByteReverse(BIG_ENDIAN_ORDER, v, v, m_blockSize); -} - -void BTEA::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - unsigned int n = m_blockSize / 4; - word32 *v = (word32*)outBlock; - ConditionalByteReverse(BIG_ENDIAN_ORDER, v, (const word32*)inBlock, m_blockSize); - - word32 y = v[0], z = v[n-1], e; - word32 p, q = 6+52/n; - word32 sum = q * DELTA; - - while (sum != 0) - { - e = sum>>2 & 3; - for (p = n-1; p > 0; p--) - { - z = v[p-1]; - y = v[p] -= MX; - } - - z = v[n-1]; - y = v[0] -= MX; - sum -= DELTA; - } - - ConditionalByteReverse(BIG_ENDIAN_ORDER, v, v, m_blockSize); -} - -NAMESPACE_END |