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/*
* SHA-160
* (C) 1999-2008,2011 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/sha160.h>
namespace Botan {
namespace SHA1_F {
namespace {
/*
* SHA-160 F1 Function
*/
inline void F1(u32bit A, u32bit& B, u32bit C, u32bit D, u32bit& E, u32bit msg)
{
E += (D ^ (B & (C ^ D))) + msg + 0x5A827999 + rotate_left(A, 5);
B = rotate_left(B, 30);
}
/*
* SHA-160 F2 Function
*/
inline void F2(u32bit A, u32bit& B, u32bit C, u32bit D, u32bit& E, u32bit msg)
{
E += (B ^ C ^ D) + msg + 0x6ED9EBA1 + rotate_left(A, 5);
B = rotate_left(B, 30);
}
/*
* SHA-160 F3 Function
*/
inline void F3(u32bit A, u32bit& B, u32bit C, u32bit D, u32bit& E, u32bit msg)
{
E += ((B & C) | ((B | C) & D)) + msg + 0x8F1BBCDC + rotate_left(A, 5);
B = rotate_left(B, 30);
}
/*
* SHA-160 F4 Function
*/
inline void F4(u32bit A, u32bit& B, u32bit C, u32bit D, u32bit& E, u32bit msg)
{
E += (B ^ C ^ D) + msg + 0xCA62C1D6 + rotate_left(A, 5);
B = rotate_left(B, 30);
}
}
}
/*
* SHA-160 Compression Function
*/
void SHA_160::compress_n(const byte input[], size_t blocks)
{
using namespace SHA1_F;
u32bit A = m_digest[0], B = m_digest[1], C = m_digest[2],
D = m_digest[3], E = m_digest[4];
for(size_t i = 0; i != blocks; ++i)
{
load_be(m_W.data(), input, 16);
for(size_t j = 16; j != 80; j += 8)
{
m_W[j ] = rotate_left((m_W[j-3] ^ m_W[j-8] ^ m_W[j-14] ^ m_W[j-16]), 1);
m_W[j+1] = rotate_left((m_W[j-2] ^ m_W[j-7] ^ m_W[j-13] ^ m_W[j-15]), 1);
m_W[j+2] = rotate_left((m_W[j-1] ^ m_W[j-6] ^ m_W[j-12] ^ m_W[j-14]), 1);
m_W[j+3] = rotate_left((m_W[j ] ^ m_W[j-5] ^ m_W[j-11] ^ m_W[j-13]), 1);
m_W[j+4] = rotate_left((m_W[j+1] ^ m_W[j-4] ^ m_W[j-10] ^ m_W[j-12]), 1);
m_W[j+5] = rotate_left((m_W[j+2] ^ m_W[j-3] ^ m_W[j- 9] ^ m_W[j-11]), 1);
m_W[j+6] = rotate_left((m_W[j+3] ^ m_W[j-2] ^ m_W[j- 8] ^ m_W[j-10]), 1);
m_W[j+7] = rotate_left((m_W[j+4] ^ m_W[j-1] ^ m_W[j- 7] ^ m_W[j- 9]), 1);
}
F1(A, B, C, D, E, m_W[ 0]); F1(E, A, B, C, D, m_W[ 1]);
F1(D, E, A, B, C, m_W[ 2]); F1(C, D, E, A, B, m_W[ 3]);
F1(B, C, D, E, A, m_W[ 4]); F1(A, B, C, D, E, m_W[ 5]);
F1(E, A, B, C, D, m_W[ 6]); F1(D, E, A, B, C, m_W[ 7]);
F1(C, D, E, A, B, m_W[ 8]); F1(B, C, D, E, A, m_W[ 9]);
F1(A, B, C, D, E, m_W[10]); F1(E, A, B, C, D, m_W[11]);
F1(D, E, A, B, C, m_W[12]); F1(C, D, E, A, B, m_W[13]);
F1(B, C, D, E, A, m_W[14]); F1(A, B, C, D, E, m_W[15]);
F1(E, A, B, C, D, m_W[16]); F1(D, E, A, B, C, m_W[17]);
F1(C, D, E, A, B, m_W[18]); F1(B, C, D, E, A, m_W[19]);
F2(A, B, C, D, E, m_W[20]); F2(E, A, B, C, D, m_W[21]);
F2(D, E, A, B, C, m_W[22]); F2(C, D, E, A, B, m_W[23]);
F2(B, C, D, E, A, m_W[24]); F2(A, B, C, D, E, m_W[25]);
F2(E, A, B, C, D, m_W[26]); F2(D, E, A, B, C, m_W[27]);
F2(C, D, E, A, B, m_W[28]); F2(B, C, D, E, A, m_W[29]);
F2(A, B, C, D, E, m_W[30]); F2(E, A, B, C, D, m_W[31]);
F2(D, E, A, B, C, m_W[32]); F2(C, D, E, A, B, m_W[33]);
F2(B, C, D, E, A, m_W[34]); F2(A, B, C, D, E, m_W[35]);
F2(E, A, B, C, D, m_W[36]); F2(D, E, A, B, C, m_W[37]);
F2(C, D, E, A, B, m_W[38]); F2(B, C, D, E, A, m_W[39]);
F3(A, B, C, D, E, m_W[40]); F3(E, A, B, C, D, m_W[41]);
F3(D, E, A, B, C, m_W[42]); F3(C, D, E, A, B, m_W[43]);
F3(B, C, D, E, A, m_W[44]); F3(A, B, C, D, E, m_W[45]);
F3(E, A, B, C, D, m_W[46]); F3(D, E, A, B, C, m_W[47]);
F3(C, D, E, A, B, m_W[48]); F3(B, C, D, E, A, m_W[49]);
F3(A, B, C, D, E, m_W[50]); F3(E, A, B, C, D, m_W[51]);
F3(D, E, A, B, C, m_W[52]); F3(C, D, E, A, B, m_W[53]);
F3(B, C, D, E, A, m_W[54]); F3(A, B, C, D, E, m_W[55]);
F3(E, A, B, C, D, m_W[56]); F3(D, E, A, B, C, m_W[57]);
F3(C, D, E, A, B, m_W[58]); F3(B, C, D, E, A, m_W[59]);
F4(A, B, C, D, E, m_W[60]); F4(E, A, B, C, D, m_W[61]);
F4(D, E, A, B, C, m_W[62]); F4(C, D, E, A, B, m_W[63]);
F4(B, C, D, E, A, m_W[64]); F4(A, B, C, D, E, m_W[65]);
F4(E, A, B, C, D, m_W[66]); F4(D, E, A, B, C, m_W[67]);
F4(C, D, E, A, B, m_W[68]); F4(B, C, D, E, A, m_W[69]);
F4(A, B, C, D, E, m_W[70]); F4(E, A, B, C, D, m_W[71]);
F4(D, E, A, B, C, m_W[72]); F4(C, D, E, A, B, m_W[73]);
F4(B, C, D, E, A, m_W[74]); F4(A, B, C, D, E, m_W[75]);
F4(E, A, B, C, D, m_W[76]); F4(D, E, A, B, C, m_W[77]);
F4(C, D, E, A, B, m_W[78]); F4(B, C, D, E, A, m_W[79]);
A = (m_digest[0] += A);
B = (m_digest[1] += B);
C = (m_digest[2] += C);
D = (m_digest[3] += D);
E = (m_digest[4] += E);
input += hash_block_size();
}
}
/*
* Copy out the digest
*/
void SHA_160::copy_out(byte output[])
{
copy_out_vec_be(output, output_length(), m_digest);
}
/*
* Clear memory of sensitive data
*/
void SHA_160::clear()
{
MDx_HashFunction::clear();
zeroise(m_W);
m_digest[0] = 0x67452301;
m_digest[1] = 0xEFCDAB89;
m_digest[2] = 0x98BADCFE;
m_digest[3] = 0x10325476;
m_digest[4] = 0xC3D2E1F0;
}
}
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