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authormadmaxoft <github@xoft.cz>2014-01-22 22:26:40 +0100
committermadmaxoft <github@xoft.cz>2014-01-22 22:26:40 +0100
commit34f13d589a2ebbcae9230732c7a763b3cdd88b41 (patch)
tree4f7bad4f90ca8f7a896d83951804f0207082cafb /lib/cryptopp/seal.cpp
parentReplacing CryptoPP with PolarSSL. (diff)
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Diffstat (limited to 'lib/cryptopp/seal.cpp')
-rw-r--r--lib/cryptopp/seal.cpp213
1 files changed, 0 insertions, 213 deletions
diff --git a/lib/cryptopp/seal.cpp b/lib/cryptopp/seal.cpp
deleted file mode 100644
index f49b52203..000000000
--- a/lib/cryptopp/seal.cpp
+++ /dev/null
@@ -1,213 +0,0 @@
-// seal.cpp - written and placed in the public domain by Wei Dai
-// updated to SEAL 3.0 by Leonard Janke
-
-#include "pch.h"
-
-#include "seal.h"
-#include "sha.h"
-#include "misc.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-void SEAL_TestInstantiations()
-{
- SEAL<>::Encryption x;
-}
-
-struct SEAL_Gamma
-{
- SEAL_Gamma(const byte *key)
- : H(5), Z(5), D(16), lastIndex(0xffffffff)
- {
- GetUserKey(BIG_ENDIAN_ORDER, H.begin(), 5, key, 20);
- memset(D, 0, 64);
- }
-
- word32 Apply(word32 i);
-
- SecBlock<word32> H, Z, D;
- word32 lastIndex;
-};
-
-word32 SEAL_Gamma::Apply(word32 i)
-{
- word32 shaIndex = i/5;
- if (shaIndex != lastIndex)
- {
- memcpy(Z, H, 20);
- D[0] = shaIndex;
- SHA::Transform(Z, D);
- lastIndex = shaIndex;
- }
- return Z[i%5];
-}
-
-template <class B>
-void SEAL_Policy<B>::CipherSetKey(const NameValuePairs &params, const byte *key, size_t length)
-{
- m_insideCounter = m_outsideCounter = m_startCount = 0;
-
- unsigned int L = params.GetIntValueWithDefault("NumberOfOutputBitsPerPositionIndex", 32*1024);
- m_iterationsPerCount = L / 8192;
-
- SEAL_Gamma gamma(key);
- unsigned int i;
-
- for (i=0; i<512; i++)
- m_T[i] = gamma.Apply(i);
-
- for (i=0; i<256; i++)
- m_S[i] = gamma.Apply(0x1000+i);
-
- m_R.New(4*(L/8192));
-
- for (i=0; i<m_R.size(); i++)
- m_R[i] = gamma.Apply(0x2000+i);
-}
-
-template <class B>
-void SEAL_Policy<B>::CipherResynchronize(byte *keystreamBuffer, const byte *IV, size_t length)
-{
- assert(length==4);
- m_outsideCounter = IV ? GetWord<word32>(false, BIG_ENDIAN_ORDER, IV) : 0;
- m_startCount = m_outsideCounter;
- m_insideCounter = 0;
-}
-
-template <class B>
-void SEAL_Policy<B>::SeekToIteration(lword iterationCount)
-{
- m_outsideCounter = m_startCount + (unsigned int)(iterationCount / m_iterationsPerCount);
- m_insideCounter = (unsigned int)(iterationCount % m_iterationsPerCount);
-}
-
-template <class B>
-void SEAL_Policy<B>::OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount)
-{
- word32 a, b, c, d, n1, n2, n3, n4;
- unsigned int p, q;
-
- for (size_t iteration = 0; iteration < iterationCount; ++iteration)
- {
-#define Ttab(x) *(word32 *)((byte *)m_T.begin()+x)
-
- a = m_outsideCounter ^ m_R[4*m_insideCounter];
- b = rotrFixed(m_outsideCounter, 8U) ^ m_R[4*m_insideCounter+1];
- c = rotrFixed(m_outsideCounter, 16U) ^ m_R[4*m_insideCounter+2];
- d = rotrFixed(m_outsideCounter, 24U) ^ m_R[4*m_insideCounter+3];
-
- for (unsigned int j=0; j<2; j++)
- {
- p = a & 0x7fc;
- b += Ttab(p);
- a = rotrFixed(a, 9U);
-
- p = b & 0x7fc;
- c += Ttab(p);
- b = rotrFixed(b, 9U);
-
- p = c & 0x7fc;
- d += Ttab(p);
- c = rotrFixed(c, 9U);
-
- p = d & 0x7fc;
- a += Ttab(p);
- d = rotrFixed(d, 9U);
- }
-
- n1 = d, n2 = b, n3 = a, n4 = c;
-
- p = a & 0x7fc;
- b += Ttab(p);
- a = rotrFixed(a, 9U);
-
- p = b & 0x7fc;
- c += Ttab(p);
- b = rotrFixed(b, 9U);
-
- p = c & 0x7fc;
- d += Ttab(p);
- c = rotrFixed(c, 9U);
-
- p = d & 0x7fc;
- a += Ttab(p);
- d = rotrFixed(d, 9U);
-
- // generate 8192 bits
- for (unsigned int i=0; i<64; i++)
- {
- p = a & 0x7fc;
- a = rotrFixed(a, 9U);
- b += Ttab(p);
- b ^= a;
-
- q = b & 0x7fc;
- b = rotrFixed(b, 9U);
- c ^= Ttab(q);
- c += b;
-
- p = (p+c) & 0x7fc;
- c = rotrFixed(c, 9U);
- d += Ttab(p);
- d ^= c;
-
- q = (q+d) & 0x7fc;
- d = rotrFixed(d, 9U);
- a ^= Ttab(q);
- a += d;
-
- p = (p+a) & 0x7fc;
- b ^= Ttab(p);
- a = rotrFixed(a, 9U);
-
- q = (q+b) & 0x7fc;
- c += Ttab(q);
- b = rotrFixed(b, 9U);
-
- p = (p+c) & 0x7fc;
- d ^= Ttab(p);
- c = rotrFixed(c, 9U);
-
- q = (q+d) & 0x7fc;
- d = rotrFixed(d, 9U);
- a += Ttab(q);
-
-#define SEAL_OUTPUT(x) \
- CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, B::ToEnum(), 0, b + m_S[4*i+0]);\
- CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, B::ToEnum(), 1, c ^ m_S[4*i+1]);\
- CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, B::ToEnum(), 2, d + m_S[4*i+2]);\
- CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, B::ToEnum(), 3, a ^ m_S[4*i+3]);
-
- CRYPTOPP_KEYSTREAM_OUTPUT_SWITCH(SEAL_OUTPUT, 4*4);
-
- if (i & 1)
- {
- a += n3;
- b += n4;
- c ^= n3;
- d ^= n4;
- }
- else
- {
- a += n1;
- b += n2;
- c ^= n1;
- d ^= n2;
- }
- }
-
- if (++m_insideCounter == m_iterationsPerCount)
- {
- ++m_outsideCounter;
- m_insideCounter = 0;
- }
- }
-
- a = b = c = d = n1 = n2 = n3 = n4 = 0;
- p = q = 0;
-}
-
-template class SEAL_Policy<BigEndian>;
-template class SEAL_Policy<LittleEndian>;
-
-NAMESPACE_END