3 * Copyright (C) 2006-2012 Sawtooth Consulting Ltd.
5 * This file is part of CyaSSL.
7 * CyaSSL is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * CyaSSL is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
29 #include <cyassl/ctaocrypt/md4.h>
31 #include <cyassl/ctaocrypt/misc.h>
33 #include <ctaocrypt/src/misc.c>
39 static INLINE word32 min(word32 a, word32 b)
47 void InitMd4(Md4* md4)
49 md4->digest[0] = 0x67452301L;
50 md4->digest[1] = 0xefcdab89L;
51 md4->digest[2] = 0x98badcfeL;
52 md4->digest[3] = 0x10325476L;
60 static void Transform(Md4* md4)
62 #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
63 #define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
64 #define H(x, y, z) ((x) ^ (y) ^ (z))
66 /* Copy context->state[] to working vars */
67 word32 A = md4->digest[0];
68 word32 B = md4->digest[1];
69 word32 C = md4->digest[2];
70 word32 D = md4->digest[3];
72 #define function(a,b,c,d,k,s) a=rotlFixed(a+F(b,c,d)+md4->buffer[k],s);
73 function(A,B,C,D, 0, 3);
74 function(D,A,B,C, 1, 7);
75 function(C,D,A,B, 2,11);
76 function(B,C,D,A, 3,19);
77 function(A,B,C,D, 4, 3);
78 function(D,A,B,C, 5, 7);
79 function(C,D,A,B, 6,11);
80 function(B,C,D,A, 7,19);
81 function(A,B,C,D, 8, 3);
82 function(D,A,B,C, 9, 7);
83 function(C,D,A,B,10,11);
84 function(B,C,D,A,11,19);
85 function(A,B,C,D,12, 3);
86 function(D,A,B,C,13, 7);
87 function(C,D,A,B,14,11);
88 function(B,C,D,A,15,19);
91 #define function(a,b,c,d,k,s) \
92 a=rotlFixed(a+G(b,c,d)+md4->buffer[k]+0x5a827999,s);
94 function(A,B,C,D, 0, 3);
95 function(D,A,B,C, 4, 5);
96 function(C,D,A,B, 8, 9);
97 function(B,C,D,A,12,13);
98 function(A,B,C,D, 1, 3);
99 function(D,A,B,C, 5, 5);
100 function(C,D,A,B, 9, 9);
101 function(B,C,D,A,13,13);
102 function(A,B,C,D, 2, 3);
103 function(D,A,B,C, 6, 5);
104 function(C,D,A,B,10, 9);
105 function(B,C,D,A,14,13);
106 function(A,B,C,D, 3, 3);
107 function(D,A,B,C, 7, 5);
108 function(C,D,A,B,11, 9);
109 function(B,C,D,A,15,13);
112 #define function(a,b,c,d,k,s) \
113 a=rotlFixed(a+H(b,c,d)+md4->buffer[k]+0x6ed9eba1,s);
115 function(A,B,C,D, 0, 3);
116 function(D,A,B,C, 8, 9);
117 function(C,D,A,B, 4,11);
118 function(B,C,D,A,12,15);
119 function(A,B,C,D, 2, 3);
120 function(D,A,B,C,10, 9);
121 function(C,D,A,B, 6,11);
122 function(B,C,D,A,14,15);
123 function(A,B,C,D, 1, 3);
124 function(D,A,B,C, 9, 9);
125 function(C,D,A,B, 5,11);
126 function(B,C,D,A,13,15);
127 function(A,B,C,D, 3, 3);
128 function(D,A,B,C,11, 9);
129 function(C,D,A,B, 7,11);
130 function(B,C,D,A,15,15);
132 /* Add the working vars back into digest state[] */
140 static INLINE void AddLength(Md4* md4, word32 len)
142 word32 tmp = md4->loLen;
143 if ( (md4->loLen += len) < tmp)
144 md4->hiLen++; /* carry low to high */
148 void Md4Update(Md4* md4, const byte* data, word32 len)
150 /* do block size increments */
151 byte* local = (byte*)md4->buffer;
154 word32 add = min(len, MD4_BLOCK_SIZE - md4->buffLen);
155 XMEMCPY(&local[md4->buffLen], data, add);
161 if (md4->buffLen == MD4_BLOCK_SIZE) {
162 #ifdef BIG_ENDIAN_ORDER
163 ByteReverseBytes(local, local, MD4_BLOCK_SIZE);
166 AddLength(md4, MD4_BLOCK_SIZE);
173 void Md4Final(Md4* md4, byte* hash)
175 byte* local = (byte*)md4->buffer;
177 AddLength(md4, md4->buffLen); /* before adding pads */
179 local[md4->buffLen++] = 0x80; /* add 1 */
182 if (md4->buffLen > MD4_PAD_SIZE) {
183 XMEMSET(&local[md4->buffLen], 0, MD4_BLOCK_SIZE - md4->buffLen);
184 md4->buffLen += MD4_BLOCK_SIZE - md4->buffLen;
186 #ifdef BIG_ENDIAN_ORDER
187 ByteReverseBytes(local, local, MD4_BLOCK_SIZE);
192 XMEMSET(&local[md4->buffLen], 0, MD4_PAD_SIZE - md4->buffLen);
194 /* put lengths in bits */
195 md4->hiLen = (md4->loLen >> (8*sizeof(md4->loLen) - 3)) +
197 md4->loLen = md4->loLen << 3;
200 #ifdef BIG_ENDIAN_ORDER
201 ByteReverseBytes(local, local, MD4_BLOCK_SIZE);
203 /* ! length ordering dependent on digest endian type ! */
204 XMEMCPY(&local[MD4_PAD_SIZE], &md4->loLen, sizeof(word32));
205 XMEMCPY(&local[MD4_PAD_SIZE + sizeof(word32)], &md4->hiLen, sizeof(word32));
208 #ifdef BIG_ENDIAN_ORDER
209 ByteReverseWords(md4->digest, md4->digest, MD4_DIGEST_SIZE);
211 XMEMCPY(hash, md4->digest, MD4_DIGEST_SIZE);
213 InitMd4(md4); /* reset state */