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Diffstat (limited to 'lib/hash/md5/md5.cpp')
| -rw-r--r-- | lib/hash/md5/md5.cpp | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/lib/hash/md5/md5.cpp b/lib/hash/md5/md5.cpp new file mode 100644 index 000000000..948f4e73b --- /dev/null +++ b/lib/hash/md5/md5.cpp @@ -0,0 +1,136 @@ +/* +* MD5 +* (C) 1999-2008 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/md5.h> +#include <botan/loadstor.h> +#include <botan/rotate.h> + +namespace Botan { + +namespace { + +/* +* MD5 FF Function +*/ +inline void FF(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit msg, + byte S, u32bit magic) + { + A += (D ^ (B & (C ^ D))) + msg + magic; + A = rotate_left(A, S) + B; + } + +/* +* MD5 GG Function +*/ +inline void GG(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit msg, + byte S, u32bit magic) + { + A += (C ^ (D & (B ^ C))) + msg + magic; + A = rotate_left(A, S) + B; + } + +/* +* MD5 HH Function +*/ +inline void HH(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit msg, + byte S, u32bit magic) + { + A += (B ^ C ^ D) + msg + magic; + A = rotate_left(A, S) + B; + } + +/* +* MD5 II Function +*/ +inline void II(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit msg, + byte S, u32bit magic) + { + A += (C ^ (B | ~D)) + msg + magic; + A = rotate_left(A, S) + B; + } + +} + +/* +* MD5 Compression Function +*/ +void MD5::compress_n(const byte input[], size_t blocks) + { + u32bit A = digest[0], B = digest[1], C = digest[2], D = digest[3]; + + for(size_t i = 0; i != blocks; ++i) + { + load_le(&M[0], input, M.size()); + + FF(A,B,C,D,M[ 0], 7,0xD76AA478); FF(D,A,B,C,M[ 1],12,0xE8C7B756); + FF(C,D,A,B,M[ 2],17,0x242070DB); FF(B,C,D,A,M[ 3],22,0xC1BDCEEE); + FF(A,B,C,D,M[ 4], 7,0xF57C0FAF); FF(D,A,B,C,M[ 5],12,0x4787C62A); + FF(C,D,A,B,M[ 6],17,0xA8304613); FF(B,C,D,A,M[ 7],22,0xFD469501); + FF(A,B,C,D,M[ 8], 7,0x698098D8); FF(D,A,B,C,M[ 9],12,0x8B44F7AF); + FF(C,D,A,B,M[10],17,0xFFFF5BB1); FF(B,C,D,A,M[11],22,0x895CD7BE); + FF(A,B,C,D,M[12], 7,0x6B901122); FF(D,A,B,C,M[13],12,0xFD987193); + FF(C,D,A,B,M[14],17,0xA679438E); FF(B,C,D,A,M[15],22,0x49B40821); + + GG(A,B,C,D,M[ 1], 5,0xF61E2562); GG(D,A,B,C,M[ 6], 9,0xC040B340); + GG(C,D,A,B,M[11],14,0x265E5A51); GG(B,C,D,A,M[ 0],20,0xE9B6C7AA); + GG(A,B,C,D,M[ 5], 5,0xD62F105D); GG(D,A,B,C,M[10], 9,0x02441453); + GG(C,D,A,B,M[15],14,0xD8A1E681); GG(B,C,D,A,M[ 4],20,0xE7D3FBC8); + GG(A,B,C,D,M[ 9], 5,0x21E1CDE6); GG(D,A,B,C,M[14], 9,0xC33707D6); + GG(C,D,A,B,M[ 3],14,0xF4D50D87); GG(B,C,D,A,M[ 8],20,0x455A14ED); + GG(A,B,C,D,M[13], 5,0xA9E3E905); GG(D,A,B,C,M[ 2], 9,0xFCEFA3F8); + GG(C,D,A,B,M[ 7],14,0x676F02D9); GG(B,C,D,A,M[12],20,0x8D2A4C8A); + + HH(A,B,C,D,M[ 5], 4,0xFFFA3942); HH(D,A,B,C,M[ 8],11,0x8771F681); + HH(C,D,A,B,M[11],16,0x6D9D6122); HH(B,C,D,A,M[14],23,0xFDE5380C); + HH(A,B,C,D,M[ 1], 4,0xA4BEEA44); HH(D,A,B,C,M[ 4],11,0x4BDECFA9); + HH(C,D,A,B,M[ 7],16,0xF6BB4B60); HH(B,C,D,A,M[10],23,0xBEBFBC70); + HH(A,B,C,D,M[13], 4,0x289B7EC6); HH(D,A,B,C,M[ 0],11,0xEAA127FA); + HH(C,D,A,B,M[ 3],16,0xD4EF3085); HH(B,C,D,A,M[ 6],23,0x04881D05); + HH(A,B,C,D,M[ 9], 4,0xD9D4D039); HH(D,A,B,C,M[12],11,0xE6DB99E5); + HH(C,D,A,B,M[15],16,0x1FA27CF8); HH(B,C,D,A,M[ 2],23,0xC4AC5665); + + II(A,B,C,D,M[ 0], 6,0xF4292244); II(D,A,B,C,M[ 7],10,0x432AFF97); + II(C,D,A,B,M[14],15,0xAB9423A7); II(B,C,D,A,M[ 5],21,0xFC93A039); + II(A,B,C,D,M[12], 6,0x655B59C3); II(D,A,B,C,M[ 3],10,0x8F0CCC92); + II(C,D,A,B,M[10],15,0xFFEFF47D); II(B,C,D,A,M[ 1],21,0x85845DD1); + II(A,B,C,D,M[ 8], 6,0x6FA87E4F); II(D,A,B,C,M[15],10,0xFE2CE6E0); + II(C,D,A,B,M[ 6],15,0xA3014314); II(B,C,D,A,M[13],21,0x4E0811A1); + II(A,B,C,D,M[ 4], 6,0xF7537E82); II(D,A,B,C,M[11],10,0xBD3AF235); + II(C,D,A,B,M[ 2],15,0x2AD7D2BB); II(B,C,D,A,M[ 9],21,0xEB86D391); + + A = (digest[0] += A); + B = (digest[1] += B); + C = (digest[2] += C); + D = (digest[3] += D); + + input += hash_block_size(); + } + } + +/* +* Copy out the digest +*/ +void MD5::copy_out(byte output[]) + { + for(size_t i = 0; i != output_length(); i += 4) + store_le(digest[i/4], output + i); + } + +/* +* Clear memory of sensitive data +*/ +void MD5::clear() + { + MDx_HashFunction::clear(); + zeroise(M); + digest[0] = 0x67452301; + digest[1] = 0xEFCDAB89; + digest[2] = 0x98BADCFE; + digest[3] = 0x10325476; + } + +} |