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// ttmac.cpp - written and placed in the public domain by Kevin Springle
#include "pch.h"
#include "ttmac.h"
#include "misc.h"
NAMESPACE_BEGIN(CryptoPP)
void TTMAC_Base::UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs &)
{
AssertValidKeyLength(keylength);
memcpy(m_key, userKey, KEYLENGTH);
CorrectEndianess(m_key, m_key, KEYLENGTH);
Init();
}
void TTMAC_Base::Init()
{
m_digest[0] = m_digest[5] = m_key[0];
m_digest[1] = m_digest[6] = m_key[1];
m_digest[2] = m_digest[7] = m_key[2];
m_digest[3] = m_digest[8] = m_key[3];
m_digest[4] = m_digest[9] = m_key[4];
}
void TTMAC_Base::TruncatedFinal(byte *hash, size_t size)
{
PadLastBlock(BlockSize() - 2*sizeof(HashWordType));
CorrectEndianess(m_data, m_data, BlockSize() - 2*sizeof(HashWordType));
m_data[m_data.size()-2] = GetBitCountLo();
m_data[m_data.size()-1] = GetBitCountHi();
Transform(m_digest, m_data, true);
word32 t2 = m_digest[2];
word32 t3 = m_digest[3];
if (size != DIGESTSIZE)
{
switch (size)
{
case 16:
m_digest[3] += m_digest[1] + m_digest[4];
// fall through
case 12:
m_digest[2] += m_digest[0] + t3;
// fall through
case 8:
m_digest[0] += m_digest[1] + t3;
m_digest[1] += m_digest[4] + t2;
break;
case 4:
m_digest[0] +=
m_digest[1] +
m_digest[2] +
m_digest[3] +
m_digest[4];
break;
case 0:
// Used by HashTransformation::Restart()
break;
default:
throw InvalidArgument("TTMAC_Base: can't truncate a Two-Track-MAC 20 byte digest to " + IntToString(size) + " bytes");
break;
}
}
CorrectEndianess(m_digest, m_digest, size);
memcpy(hash, m_digest, size);
Restart(); // reinit for next use
}
// RIPEMD-160 definitions used by Two-Track-MAC
#define F(x, y, z) (x ^ y ^ z)
#define G(x, y, z) (z ^ (x & (y^z)))
#define H(x, y, z) (z ^ (x | ~y))
#define I(x, y, z) (y ^ (z & (x^y)))
#define J(x, y, z) (x ^ (y | ~z))
#define k0 0
#define k1 0x5a827999UL
#define k2 0x6ed9eba1UL
#define k3 0x8f1bbcdcUL
#define k4 0xa953fd4eUL
#define k5 0x50a28be6UL
#define k6 0x5c4dd124UL
#define k7 0x6d703ef3UL
#define k8 0x7a6d76e9UL
#define k9 0
void TTMAC_Base::Transform(word32 *digest, const word32 *X, bool last)
{
#define Subround(f, a, b, c, d, e, x, s, k) \
a += f(b, c, d) + x + k;\
a = rotlFixed((word32)a, s) + e;\
c = rotlFixed((word32)c, 10U)
word32 a1, b1, c1, d1, e1, a2, b2, c2, d2, e2;
word32 *trackA, *trackB;
if (!last)
{
trackA = digest;
trackB = digest+5;
}
else
{
trackB = digest;
trackA = digest+5;
}
a1 = trackA[0];
b1 = trackA[1];
c1 = trackA[2];
d1 = trackA[3];
e1 = trackA[4];
a2 = trackB[0];
b2 = trackB[1];
c2 = trackB[2];
d2 = trackB[3];
e2 = trackB[4];
Subround(F, a1, b1, c1, d1, e1, X[ 0], 11, k0);
Subround(F, e1, a1, b1, c1, d1, X[ 1], 14, k0);
Subround(F, d1, e1, a1, b1, c1, X[ 2], 15, k0);
Subround(F, c1, d1, e1, a1, b1, X[ 3], 12, k0);
Subround(F, b1, c1, d1, e1, a1, X[ 4], 5, k0);
Subround(F, a1, b1, c1, d1, e1, X[ 5], 8, k0);
Subround(F, e1, a1, b1, c1, d1, X[ 6], 7, k0);
Subround(F, d1, e1, a1, b1, c1, X[ 7], 9, k0);
Subround(F, c1, d1, e1, a1, b1, X[ 8], 11, k0);
Subround(F, b1, c1, d1, e1, a1, X[ 9], 13, k0);
Subround(F, a1, b1, c1, d1, e1, X[10], 14, k0);
Subround(F, e1, a1, b1, c1, d1, X[11], 15, k0);
Subround(F, d1, e1, a1, b1, c1, X[12], 6, k0);
Subround(F, c1, d1, e1, a1, b1, X[13], 7, k0);
Subround(F, b1, c1, d1, e1, a1, X[14], 9, k0);
Subround(F, a1, b1, c1, d1, e1, X[15], 8, k0);
Subround(G, e1, a1, b1, c1, d1, X[ 7], 7, k1);
Subround(G, d1, e1, a1, b1, c1, X[ 4], 6, k1);
Subround(G, c1, d1, e1, a1, b1, X[13], 8, k1);
Subround(G, b1, c1, d1, e1, a1, X[ 1], 13, k1);
Subround(G, a1, b1, c1, d1, e1, X[10], 11, k1);
Subround(G, e1, a1, b1, c1, d1, X[ 6], 9, k1);
Subround(G, d1, e1, a1, b1, c1, X[15], 7, k1);
Subround(G, c1, d1, e1, a1, b1, X[ 3], 15, k1);
Subround(G, b1, c1, d1, e1, a1, X[12], 7, k1);
Subround(G, a1, b1, c1, d1, e1, X[ 0], 12, k1);
Subround(G, e1, a1, b1, c1, d1, X[ 9], 15, k1);
Subround(G, d1, e1, a1, b1, c1, X[ 5], 9, k1);
Subround(G, c1, d1, e1, a1, b1, X[ 2], 11, k1);
Subround(G, b1, c1, d1, e1, a1, X[14], 7, k1);
Subround(G, a1, b1, c1, d1, e1, X[11], 13, k1);
Subround(G, e1, a1, b1, c1, d1, X[ 8], 12, k1);
Subround(H, d1, e1, a1, b1, c1, X[ 3], 11, k2);
Subround(H, c1, d1, e1, a1, b1, X[10], 13, k2);
Subround(H, b1, c1, d1, e1, a1, X[14], 6, k2);
Subround(H, a1, b1, c1, d1, e1, X[ 4], 7, k2);
Subround(H, e1, a1, b1, c1, d1, X[ 9], 14, k2);
Subround(H, d1, e1, a1, b1, c1, X[15], 9, k2);
Subround(H, c1, d1, e1, a1, b1, X[ 8], 13, k2);
Subround(H, b1, c1, d1, e1, a1, X[ 1], 15, k2);
Subround(H, a1, b1, c1, d1, e1, X[ 2], 14, k2);
Subround(H, e1, a1, b1, c1, d1, X[ 7], 8, k2);
Subround(H, d1, e1, a1, b1, c1, X[ 0], 13, k2);
Subround(H, c1, d1, e1, a1, b1, X[ 6], 6, k2);
Subround(H, b1, c1, d1, e1, a1, X[13], 5, k2);
Subround(H, a1, b1, c1, d1, e1, X[11], 12, k2);
Subround(H, e1, a1, b1, c1, d1, X[ 5], 7, k2);
Subround(H, d1, e1, a1, b1, c1, X[12], 5, k2);
Subround(I, c1, d1, e1, a1, b1, X[ 1], 11, k3);
Subround(I, b1, c1, d1, e1, a1, X[ 9], 12, k3);
Subround(I, a1, b1, c1, d1, e1, X[11], 14, k3);
Subround(I, e1, a1, b1, c1, d1, X[10], 15, k3);
Subround(I, d1, e1, a1, b1, c1, X[ 0], 14, k3);
Subround(I, c1, d1, e1, a1, b1, X[ 8], 15, k3);
Subround(I, b1, c1, d1, e1, a1, X[12], 9, k3);
Subround(I, a1, b1, c1, d1, e1, X[ 4], 8, k3);
Subround(I, e1, a1, b1, c1, d1, X[13], 9, k3);
Subround(I, d1, e1, a1, b1, c1, X[ 3], 14, k3);
Subround(I, c1, d1, e1, a1, b1, X[ 7], 5, k3);
Subround(I, b1, c1, d1, e1, a1, X[15], 6, k3);
Subround(I, a1, b1, c1, d1, e1, X[14], 8, k3);
Subround(I, e1, a1, b1, c1, d1, X[ 5], 6, k3);
Subround(I, d1, e1, a1, b1, c1, X[ 6], 5, k3);
Subround(I, c1, d1, e1, a1, b1, X[ 2], 12, k3);
Subround(J, b1, c1, d1, e1, a1, X[ 4], 9, k4);
Subround(J, a1, b1, c1, d1, e1, X[ 0], 15, k4);
Subround(J, e1, a1, b1, c1, d1, X[ 5], 5, k4);
Subround(J, d1, e1, a1, b1, c1, X[ 9], 11, k4);
Subround(J, c1, d1, e1, a1, b1, X[ 7], 6, k4);
Subround(J, b1, c1, d1, e1, a1, X[12], 8, k4);
Subround(J, a1, b1, c1, d1, e1, X[ 2], 13, k4);
Subround(J, e1, a1, b1, c1, d1, X[10], 12, k4);
Subround(J, d1, e1, a1, b1, c1, X[14], 5, k4);
Subround(J, c1, d1, e1, a1, b1, X[ 1], 12, k4);
Subround(J, b1, c1, d1, e1, a1, X[ 3], 13, k4);
Subround(J, a1, b1, c1, d1, e1, X[ 8], 14, k4);
Subround(J, e1, a1, b1, c1, d1, X[11], 11, k4);
Subround(J, d1, e1, a1, b1, c1, X[ 6], 8, k4);
Subround(J, c1, d1, e1, a1, b1, X[15], 5, k4);
Subround(J, b1, c1, d1, e1, a1, X[13], 6, k4);
Subround(J, a2, b2, c2, d2, e2, X[ 5], 8, k5);
Subround(J, e2, a2, b2, c2, d2, X[14], 9, k5);
Subround(J, d2, e2, a2, b2, c2, X[ 7], 9, k5);
Subround(J, c2, d2, e2, a2, b2, X[ 0], 11, k5);
Subround(J, b2, c2, d2, e2, a2, X[ 9], 13, k5);
Subround(J, a2, b2, c2, d2, e2, X[ 2], 15, k5);
Subround(J, e2, a2, b2, c2, d2, X[11], 15, k5);
Subround(J, d2, e2, a2, b2, c2, X[ 4], 5, k5);
Subround(J, c2, d2, e2, a2, b2, X[13], 7, k5);
Subround(J, b2, c2, d2, e2, a2, X[ 6], 7, k5);
Subround(J, a2, b2, c2, d2, e2, X[15], 8, k5);
Subround(J, e2, a2, b2, c2, d2, X[ 8], 11, k5);
Subround(J, d2, e2, a2, b2, c2, X[ 1], 14, k5);
Subround(J, c2, d2, e2, a2, b2, X[10], 14, k5);
Subround(J, b2, c2, d2, e2, a2, X[ 3], 12, k5);
Subround(J, a2, b2, c2, d2, e2, X[12], 6, k5);
Subround(I, e2, a2, b2, c2, d2, X[ 6], 9, k6);
Subround(I, d2, e2, a2, b2, c2, X[11], 13, k6);
Subround(I, c2, d2, e2, a2, b2, X[ 3], 15, k6);
Subround(I, b2, c2, d2, e2, a2, X[ 7], 7, k6);
Subround(I, a2, b2, c2, d2, e2, X[ 0], 12, k6);
Subround(I, e2, a2, b2, c2, d2, X[13], 8, k6);
Subround(I, d2, e2, a2, b2, c2, X[ 5], 9, k6);
Subround(I, c2, d2, e2, a2, b2, X[10], 11, k6);
Subround(I, b2, c2, d2, e2, a2, X[14], 7, k6);
Subround(I, a2, b2, c2, d2, e2, X[15], 7, k6);
Subround(I, e2, a2, b2, c2, d2, X[ 8], 12, k6);
Subround(I, d2, e2, a2, b2, c2, X[12], 7, k6);
Subround(I, c2, d2, e2, a2, b2, X[ 4], 6, k6);
Subround(I, b2, c2, d2, e2, a2, X[ 9], 15, k6);
Subround(I, a2, b2, c2, d2, e2, X[ 1], 13, k6);
Subround(I, e2, a2, b2, c2, d2, X[ 2], 11, k6);
Subround(H, d2, e2, a2, b2, c2, X[15], 9, k7);
Subround(H, c2, d2, e2, a2, b2, X[ 5], 7, k7);
Subround(H, b2, c2, d2, e2, a2, X[ 1], 15, k7);
Subround(H, a2, b2, c2, d2, e2, X[ 3], 11, k7);
Subround(H, e2, a2, b2, c2, d2, X[ 7], 8, k7);
Subround(H, d2, e2, a2, b2, c2, X[14], 6, k7);
Subround(H, c2, d2, e2, a2, b2, X[ 6], 6, k7);
Subround(H, b2, c2, d2, e2, a2, X[ 9], 14, k7);
Subround(H, a2, b2, c2, d2, e2, X[11], 12, k7);
Subround(H, e2, a2, b2, c2, d2, X[ 8], 13, k7);
Subround(H, d2, e2, a2, b2, c2, X[12], 5, k7);
Subround(H, c2, d2, e2, a2, b2, X[ 2], 14, k7);
Subround(H, b2, c2, d2, e2, a2, X[10], 13, k7);
Subround(H, a2, b2, c2, d2, e2, X[ 0], 13, k7);
Subround(H, e2, a2, b2, c2, d2, X[ 4], 7, k7);
Subround(H, d2, e2, a2, b2, c2, X[13], 5, k7);
Subround(G, c2, d2, e2, a2, b2, X[ 8], 15, k8);
Subround(G, b2, c2, d2, e2, a2, X[ 6], 5, k8);
Subround(G, a2, b2, c2, d2, e2, X[ 4], 8, k8);
Subround(G, e2, a2, b2, c2, d2, X[ 1], 11, k8);
Subround(G, d2, e2, a2, b2, c2, X[ 3], 14, k8);
Subround(G, c2, d2, e2, a2, b2, X[11], 14, k8);
Subround(G, b2, c2, d2, e2, a2, X[15], 6, k8);
Subround(G, a2, b2, c2, d2, e2, X[ 0], 14, k8);
Subround(G, e2, a2, b2, c2, d2, X[ 5], 6, k8);
Subround(G, d2, e2, a2, b2, c2, X[12], 9, k8);
Subround(G, c2, d2, e2, a2, b2, X[ 2], 12, k8);
Subround(G, b2, c2, d2, e2, a2, X[13], 9, k8);
Subround(G, a2, b2, c2, d2, e2, X[ 9], 12, k8);
Subround(G, e2, a2, b2, c2, d2, X[ 7], 5, k8);
Subround(G, d2, e2, a2, b2, c2, X[10], 15, k8);
Subround(G, c2, d2, e2, a2, b2, X[14], 8, k8);
Subround(F, b2, c2, d2, e2, a2, X[12], 8, k9);
Subround(F, a2, b2, c2, d2, e2, X[15], 5, k9);
Subround(F, e2, a2, b2, c2, d2, X[10], 12, k9);
Subround(F, d2, e2, a2, b2, c2, X[ 4], 9, k9);
Subround(F, c2, d2, e2, a2, b2, X[ 1], 12, k9);
Subround(F, b2, c2, d2, e2, a2, X[ 5], 5, k9);
Subround(F, a2, b2, c2, d2, e2, X[ 8], 14, k9);
Subround(F, e2, a2, b2, c2, d2, X[ 7], 6, k9);
Subround(F, d2, e2, a2, b2, c2, X[ 6], 8, k9);
Subround(F, c2, d2, e2, a2, b2, X[ 2], 13, k9);
Subround(F, b2, c2, d2, e2, a2, X[13], 6, k9);
Subround(F, a2, b2, c2, d2, e2, X[14], 5, k9);
Subround(F, e2, a2, b2, c2, d2, X[ 0], 15, k9);
Subround(F, d2, e2, a2, b2, c2, X[ 3], 13, k9);
Subround(F, c2, d2, e2, a2, b2, X[ 9], 11, k9);
Subround(F, b2, c2, d2, e2, a2, X[11], 11, k9);
a1 -= trackA[0];
b1 -= trackA[1];
c1 -= trackA[2];
d1 -= trackA[3];
e1 -= trackA[4];
a2 -= trackB[0];
b2 -= trackB[1];
c2 -= trackB[2];
d2 -= trackB[3];
e2 -= trackB[4];
if (!last)
{
trackA[0] = (b1 + e1) - d2;
trackA[1] = c1 - e2;
trackA[2] = d1 - a2;
trackA[3] = e1 - b2;
trackA[4] = a1 - c2;
trackB[0] = d1 - e2;
trackB[1] = (e1 + c1) - a2;
trackB[2] = a1 - b2;
trackB[3] = b1 - c2;
trackB[4] = c1 - d2;
}
else
{
trackB[0] = a2 - a1;
trackB[1] = b2 - b1;
trackB[2] = c2 - c1;
trackB[3] = d2 - d1;
trackB[4] = e2 - e1;
trackA[0] = 0;
trackA[1] = 0;
trackA[2] = 0;
trackA[3] = 0;
trackA[4] = 0;
}
}
NAMESPACE_END
|
