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authormadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2013-03-23 21:53:08 +0100
committermadmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>2013-03-23 21:53:08 +0100
commit561f10539494ce6cba62d58dab2a6686e04c760b (patch)
treef9d4cb50653ffa7473bdf148b900145aff8e4074 /CryptoPP/idea.cpp
parentMemDumpAnalysis now outputs executable to MCServer folder and debugging starts there. (diff)
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Diffstat (limited to 'CryptoPP/idea.cpp')
-rw-r--r--CryptoPP/idea.cpp192
1 files changed, 0 insertions, 192 deletions
diff --git a/CryptoPP/idea.cpp b/CryptoPP/idea.cpp
deleted file mode 100644
index 793f912fb..000000000
--- a/CryptoPP/idea.cpp
+++ /dev/null
@@ -1,192 +0,0 @@
-// idea.cpp - written and placed in the public domain by Wei Dai
-
-#include "pch.h"
-#include "idea.h"
-#include "misc.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-static const int IDEA_KEYLEN=(6*IDEA::ROUNDS+4); // key schedule length in # of word16s
-
-#define low16(x) ((x)&0xffff) // compiler should be able to optimize this away if word is 16 bits
-#define high16(x) ((x)>>16)
-
-CRYPTOPP_COMPILE_ASSERT(sizeof(IDEA::Word) >= 2);
-
-// should use an inline function but macros are still faster in MSVC 4.0
-#define DirectMUL(a,b) \
-{ \
- assert(b <= 0xffff); \
- \
- word32 p=(word32)low16(a)*b; \
- \
- if (p) \
- { \
- p = low16(p) - high16(p); \
- a = (IDEA::Word)p - (IDEA::Word)high16(p); \
- } \
- else \
- a = 1-a-b; \
-}
-
-#ifdef IDEA_LARGECACHE
-volatile bool IDEA::Base::tablesBuilt = false;
-word16 IDEA::Base::log[0x10000];
-word16 IDEA::Base::antilog[0x10000];
-
-void IDEA::Base::BuildLogTables()
-{
- if (tablesBuilt)
- return;
- else
- {
- tablesBuilt = true;
-
- IDEA::Word x=1;
- word32 i;
-
- for (i=0; i<0x10000; i++)
- {
- antilog[i] = (word16)x;
- DirectMUL(x, 3);
- }
-
- for (i=0; i<0x10000; i++)
- log[antilog[i]] = (word16)i;
- }
-}
-
-void IDEA::Base::LookupKeyLogs()
-{
- IDEA::Word* Z=key;
- int r=ROUNDS;
- do
- {
- Z[0] = log[Z[0]];
- Z[3] = log[Z[3]];
- Z[4] = log[Z[4]];
- Z[5] = log[Z[5]];
- Z+=6;
- } while (--r);
- Z[0] = log[Z[0]];
- Z[3] = log[Z[3]];
-}
-
-inline void IDEA::Base::LookupMUL(IDEA::Word &a, IDEA::Word b)
-{
- a = antilog[low16(log[low16(a)]+b)];
-}
-#endif // IDEA_LARGECACHE
-
-void IDEA::Base::UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &)
-{
- AssertValidKeyLength(length);
-
-#ifdef IDEA_LARGECACHE
- BuildLogTables();
-#endif
-
- EnKey(userKey);
-
- if (!IsForwardTransformation())
- DeKey();
-
-#ifdef IDEA_LARGECACHE
- LookupKeyLogs();
-#endif
-}
-
-void IDEA::Base::EnKey (const byte *userKey)
-{
- unsigned int i;
-
- for (i=0; i<8; i++)
- m_key[i] = ((IDEA::Word)userKey[2*i]<<8) | userKey[2*i+1];
-
- for (; i<IDEA_KEYLEN; i++)
- {
- unsigned int j = RoundDownToMultipleOf(i,8U)-8;
- m_key[i] = low16((m_key[j+(i+1)%8] << 9) | (m_key[j+(i+2)%8] >> 7));
- }
-}
-
-static IDEA::Word MulInv(IDEA::Word x)
-{
- IDEA::Word y=x;
- for (unsigned i=0; i<15; i++)
- {
- DirectMUL(y,low16(y));
- DirectMUL(y,x);
- }
- return low16(y);
-}
-
-static inline IDEA::Word AddInv(IDEA::Word x)
-{
- return low16(0-x);
-}
-
-void IDEA::Base::DeKey()
-{
- FixedSizeSecBlock<IDEA::Word, 6*ROUNDS+4> tempkey;
- size_t i;
-
- for (i=0; i<ROUNDS; i++)
- {
- tempkey[i*6+0] = MulInv(m_key[(ROUNDS-i)*6+0]);
- tempkey[i*6+1] = AddInv(m_key[(ROUNDS-i)*6+1+(i>0)]);
- tempkey[i*6+2] = AddInv(m_key[(ROUNDS-i)*6+2-(i>0)]);
- tempkey[i*6+3] = MulInv(m_key[(ROUNDS-i)*6+3]);
- tempkey[i*6+4] = m_key[(ROUNDS-1-i)*6+4];
- tempkey[i*6+5] = m_key[(ROUNDS-1-i)*6+5];
- }
-
- tempkey[i*6+0] = MulInv(m_key[(ROUNDS-i)*6+0]);
- tempkey[i*6+1] = AddInv(m_key[(ROUNDS-i)*6+1]);
- tempkey[i*6+2] = AddInv(m_key[(ROUNDS-i)*6+2]);
- tempkey[i*6+3] = MulInv(m_key[(ROUNDS-i)*6+3]);
-
- m_key = tempkey;
-}
-
-#ifdef IDEA_LARGECACHE
-#define MUL(a,b) LookupMUL(a,b)
-#else
-#define MUL(a,b) DirectMUL(a,b)
-#endif
-
-void IDEA::Base::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
-{
- typedef BlockGetAndPut<word16, BigEndian> Block;
-
- const IDEA::Word *key = m_key;
- IDEA::Word x0,x1,x2,x3,t0,t1;
- Block::Get(inBlock)(x0)(x1)(x2)(x3);
-
- for (unsigned int i=0; i<ROUNDS; i++)
- {
- MUL(x0, key[i*6+0]);
- x1 += key[i*6+1];
- x2 += key[i*6+2];
- MUL(x3, key[i*6+3]);
- t0 = x0^x2;
- MUL(t0, key[i*6+4]);
- t1 = t0 + (x1^x3);
- MUL(t1, key[i*6+5]);
- t0 += t1;
- x0 ^= t1;
- x3 ^= t0;
- t0 ^= x1;
- x1 = x2^t1;
- x2 = t0;
- }
-
- MUL(x0, key[ROUNDS*6+0]);
- x2 += key[ROUNDS*6+1];
- x1 += key[ROUNDS*6+2];
- MUL(x3, key[ROUNDS*6+3]);
-
- Block::Put(xorBlock, outBlock)(x0)(x2)(x1)(x3);
-}
-
-NAMESPACE_END