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Diffstat (limited to 'src/lib/hash/sha1/sha160.cpp')
| -rw-r--r-- | src/lib/hash/sha1/sha160.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/lib/hash/sha1/sha160.cpp b/src/lib/hash/sha1/sha160.cpp new file mode 100644 index 000000000..f5daaadb2 --- /dev/null +++ b/src/lib/hash/sha1/sha160.cpp @@ -0,0 +1,161 @@ +/* +* SHA-160 +* (C) 1999-2008,2011 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/sha160.h> +#include <botan/loadstor.h> +#include <botan/rotate.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 = digest[0], B = digest[1], C = digest[2], + D = digest[3], E = digest[4]; + + for(size_t i = 0; i != blocks; ++i) + { + load_be(&W[0], input, 16); + + for(size_t j = 16; j != 80; j += 8) + { + W[j ] = rotate_left((W[j-3] ^ W[j-8] ^ W[j-14] ^ W[j-16]), 1); + W[j+1] = rotate_left((W[j-2] ^ W[j-7] ^ W[j-13] ^ W[j-15]), 1); + W[j+2] = rotate_left((W[j-1] ^ W[j-6] ^ W[j-12] ^ W[j-14]), 1); + W[j+3] = rotate_left((W[j ] ^ W[j-5] ^ W[j-11] ^ W[j-13]), 1); + W[j+4] = rotate_left((W[j+1] ^ W[j-4] ^ W[j-10] ^ W[j-12]), 1); + W[j+5] = rotate_left((W[j+2] ^ W[j-3] ^ W[j- 9] ^ W[j-11]), 1); + W[j+6] = rotate_left((W[j+3] ^ W[j-2] ^ W[j- 8] ^ W[j-10]), 1); + W[j+7] = rotate_left((W[j+4] ^ W[j-1] ^ W[j- 7] ^ W[j- 9]), 1); + } + + F1(A, B, C, D, E, W[ 0]); F1(E, A, B, C, D, W[ 1]); + F1(D, E, A, B, C, W[ 2]); F1(C, D, E, A, B, W[ 3]); + F1(B, C, D, E, A, W[ 4]); F1(A, B, C, D, E, W[ 5]); + F1(E, A, B, C, D, W[ 6]); F1(D, E, A, B, C, W[ 7]); + F1(C, D, E, A, B, W[ 8]); F1(B, C, D, E, A, W[ 9]); + F1(A, B, C, D, E, W[10]); F1(E, A, B, C, D, W[11]); + F1(D, E, A, B, C, W[12]); F1(C, D, E, A, B, W[13]); + F1(B, C, D, E, A, W[14]); F1(A, B, C, D, E, W[15]); + F1(E, A, B, C, D, W[16]); F1(D, E, A, B, C, W[17]); + F1(C, D, E, A, B, W[18]); F1(B, C, D, E, A, W[19]); + + F2(A, B, C, D, E, W[20]); F2(E, A, B, C, D, W[21]); + F2(D, E, A, B, C, W[22]); F2(C, D, E, A, B, W[23]); + F2(B, C, D, E, A, W[24]); F2(A, B, C, D, E, W[25]); + F2(E, A, B, C, D, W[26]); F2(D, E, A, B, C, W[27]); + F2(C, D, E, A, B, W[28]); F2(B, C, D, E, A, W[29]); + F2(A, B, C, D, E, W[30]); F2(E, A, B, C, D, W[31]); + F2(D, E, A, B, C, W[32]); F2(C, D, E, A, B, W[33]); + F2(B, C, D, E, A, W[34]); F2(A, B, C, D, E, W[35]); + F2(E, A, B, C, D, W[36]); F2(D, E, A, B, C, W[37]); + F2(C, D, E, A, B, W[38]); F2(B, C, D, E, A, W[39]); + + F3(A, B, C, D, E, W[40]); F3(E, A, B, C, D, W[41]); + F3(D, E, A, B, C, W[42]); F3(C, D, E, A, B, W[43]); + F3(B, C, D, E, A, W[44]); F3(A, B, C, D, E, W[45]); + F3(E, A, B, C, D, W[46]); F3(D, E, A, B, C, W[47]); + F3(C, D, E, A, B, W[48]); F3(B, C, D, E, A, W[49]); + F3(A, B, C, D, E, W[50]); F3(E, A, B, C, D, W[51]); + F3(D, E, A, B, C, W[52]); F3(C, D, E, A, B, W[53]); + F3(B, C, D, E, A, W[54]); F3(A, B, C, D, E, W[55]); + F3(E, A, B, C, D, W[56]); F3(D, E, A, B, C, W[57]); + F3(C, D, E, A, B, W[58]); F3(B, C, D, E, A, W[59]); + + F4(A, B, C, D, E, W[60]); F4(E, A, B, C, D, W[61]); + F4(D, E, A, B, C, W[62]); F4(C, D, E, A, B, W[63]); + F4(B, C, D, E, A, W[64]); F4(A, B, C, D, E, W[65]); + F4(E, A, B, C, D, W[66]); F4(D, E, A, B, C, W[67]); + F4(C, D, E, A, B, W[68]); F4(B, C, D, E, A, W[69]); + F4(A, B, C, D, E, W[70]); F4(E, A, B, C, D, W[71]); + F4(D, E, A, B, C, W[72]); F4(C, D, E, A, B, W[73]); + F4(B, C, D, E, A, W[74]); F4(A, B, C, D, E, W[75]); + F4(E, A, B, C, D, W[76]); F4(D, E, A, B, C, W[77]); + F4(C, D, E, A, B, W[78]); F4(B, C, D, E, A, W[79]); + + A = (digest[0] += A); + B = (digest[1] += B); + C = (digest[2] += C); + D = (digest[3] += D); + E = (digest[4] += E); + + input += hash_block_size(); + } + } + +/* +* Copy out the digest +*/ +void SHA_160::copy_out(byte output[]) + { + for(size_t i = 0; i != output_length(); i += 4) + store_be(digest[i/4], output + i); + } + +/* +* Clear memory of sensitive data +*/ +void SHA_160::clear() + { + MDx_HashFunction::clear(); + zeroise(W); + digest[0] = 0x67452301; + digest[1] = 0xEFCDAB89; + digest[2] = 0x98BADCFE; + digest[3] = 0x10325476; + digest[4] = 0xC3D2E1F0; + } + +} |