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-rw-r--r--src/lib/hash/md4/md4.cpp114
1 files changed, 114 insertions, 0 deletions
diff --git a/src/lib/hash/md4/md4.cpp b/src/lib/hash/md4/md4.cpp
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+++ b/src/lib/hash/md4/md4.cpp
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+/*
+* 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;
+ }
+
+}