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Diffstat (limited to 'src/lib/hash/md4/md4.cpp')
-rw-r--r-- | src/lib/hash/md4/md4.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/lib/hash/md4/md4.cpp b/src/lib/hash/md4/md4.cpp new file mode 100644 index 000000000..9b9ebab36 --- /dev/null +++ b/src/lib/hash/md4/md4.cpp @@ -0,0 +1,114 @@ +/* +* MD4 +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/md4.h> +#include <botan/loadstor.h> +#include <botan/rotate.h> + +namespace Botan { + +namespace { + +/* +* MD4 FF Function +*/ +inline void FF(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit M, byte S) + { + A += (D ^ (B & (C ^ D))) + M; + A = rotate_left(A, S); + } + +/* +* MD4 GG Function +*/ +inline void GG(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit M, byte S) + { + A += ((B & C) | (D & (B | C))) + M + 0x5A827999; + A = rotate_left(A, S); + } + +/* +* MD4 HH Function +*/ +inline void HH(u32bit& A, u32bit B, u32bit C, u32bit D, u32bit M, byte S) + { + A += (B ^ C ^ D) + M + 0x6ED9EBA1; + A = rotate_left(A, S); + } + +} + +/* +* MD4 Compression Function +*/ +void MD4::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], 3); FF(D,A,B,C,M[ 1], 7); + FF(C,D,A,B,M[ 2],11); FF(B,C,D,A,M[ 3],19); + FF(A,B,C,D,M[ 4], 3); FF(D,A,B,C,M[ 5], 7); + FF(C,D,A,B,M[ 6],11); FF(B,C,D,A,M[ 7],19); + FF(A,B,C,D,M[ 8], 3); FF(D,A,B,C,M[ 9], 7); + FF(C,D,A,B,M[10],11); FF(B,C,D,A,M[11],19); + FF(A,B,C,D,M[12], 3); FF(D,A,B,C,M[13], 7); + FF(C,D,A,B,M[14],11); FF(B,C,D,A,M[15],19); + + GG(A,B,C,D,M[ 0], 3); GG(D,A,B,C,M[ 4], 5); + GG(C,D,A,B,M[ 8], 9); GG(B,C,D,A,M[12],13); + GG(A,B,C,D,M[ 1], 3); GG(D,A,B,C,M[ 5], 5); + GG(C,D,A,B,M[ 9], 9); GG(B,C,D,A,M[13],13); + GG(A,B,C,D,M[ 2], 3); GG(D,A,B,C,M[ 6], 5); + GG(C,D,A,B,M[10], 9); GG(B,C,D,A,M[14],13); + GG(A,B,C,D,M[ 3], 3); GG(D,A,B,C,M[ 7], 5); + GG(C,D,A,B,M[11], 9); GG(B,C,D,A,M[15],13); + + HH(A,B,C,D,M[ 0], 3); HH(D,A,B,C,M[ 8], 9); + HH(C,D,A,B,M[ 4],11); HH(B,C,D,A,M[12],15); + HH(A,B,C,D,M[ 2], 3); HH(D,A,B,C,M[10], 9); + HH(C,D,A,B,M[ 6],11); HH(B,C,D,A,M[14],15); + HH(A,B,C,D,M[ 1], 3); HH(D,A,B,C,M[ 9], 9); + HH(C,D,A,B,M[ 5],11); HH(B,C,D,A,M[13],15); + HH(A,B,C,D,M[ 3], 3); HH(D,A,B,C,M[11], 9); + HH(C,D,A,B,M[ 7],11); HH(B,C,D,A,M[15],15); + + 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 MD4::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 MD4::clear() + { + MDx_HashFunction::clear(); + zeroise(M); + digest[0] = 0x67452301; + digest[1] = 0xEFCDAB89; + digest[2] = 0x98BADCFE; + digest[3] = 0x10325476; + } + +} |