1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include <openssl/opensslv.h>
12#include "md4_local.h"
13
14/*
15 * Implemented from RFC1186 The MD4 Message-Digest Algorithm
16 */
17
18#define INIT_DATA_A (unsigned long)0x67452301L
19#define INIT_DATA_B (unsigned long)0xefcdab89L
20#define INIT_DATA_C (unsigned long)0x98badcfeL
21#define INIT_DATA_D (unsigned long)0x10325476L
22
23int MD4_Init(MD4_CTX *c)
24{
25    memset(c, 0, sizeof(*c));
26    c->A = INIT_DATA_A;
27    c->B = INIT_DATA_B;
28    c->C = INIT_DATA_C;
29    c->D = INIT_DATA_D;
30    return 1;
31}
32
33#ifndef md4_block_data_order
34# ifdef X
35#  undef X
36# endif
37void md4_block_data_order(MD4_CTX *c, const void *data_, size_t num)
38{
39    const unsigned char *data = data_;
40    register unsigned MD32_REG_T A, B, C, D, l;
41# ifndef MD32_XARRAY
42    /* See comment in crypto/sha/sha_local.h for details. */
43    unsigned MD32_REG_T XX0, XX1, XX2, XX3, XX4, XX5, XX6, XX7,
44        XX8, XX9, XX10, XX11, XX12, XX13, XX14, XX15;
45#  define X(i)   XX##i
46# else
47    MD4_LONG XX[MD4_LBLOCK];
48#  define X(i)   XX[i]
49# endif
50
51    A = c->A;
52    B = c->B;
53    C = c->C;
54    D = c->D;
55
56    for (; num--;) {
57        (void)HOST_c2l(data, l);
58        X(0) = l;
59        (void)HOST_c2l(data, l);
60        X(1) = l;
61        /* Round 0 */
62        R0(A, B, C, D, X(0), 3, 0);
63        (void)HOST_c2l(data, l);
64        X(2) = l;
65        R0(D, A, B, C, X(1), 7, 0);
66        (void)HOST_c2l(data, l);
67        X(3) = l;
68        R0(C, D, A, B, X(2), 11, 0);
69        (void)HOST_c2l(data, l);
70        X(4) = l;
71        R0(B, C, D, A, X(3), 19, 0);
72        (void)HOST_c2l(data, l);
73        X(5) = l;
74        R0(A, B, C, D, X(4), 3, 0);
75        (void)HOST_c2l(data, l);
76        X(6) = l;
77        R0(D, A, B, C, X(5), 7, 0);
78        (void)HOST_c2l(data, l);
79        X(7) = l;
80        R0(C, D, A, B, X(6), 11, 0);
81        (void)HOST_c2l(data, l);
82        X(8) = l;
83        R0(B, C, D, A, X(7), 19, 0);
84        (void)HOST_c2l(data, l);
85        X(9) = l;
86        R0(A, B, C, D, X(8), 3, 0);
87        (void)HOST_c2l(data, l);
88        X(10) = l;
89        R0(D, A, B, C, X(9), 7, 0);
90        (void)HOST_c2l(data, l);
91        X(11) = l;
92        R0(C, D, A, B, X(10), 11, 0);
93        (void)HOST_c2l(data, l);
94        X(12) = l;
95        R0(B, C, D, A, X(11), 19, 0);
96        (void)HOST_c2l(data, l);
97        X(13) = l;
98        R0(A, B, C, D, X(12), 3, 0);
99        (void)HOST_c2l(data, l);
100        X(14) = l;
101        R0(D, A, B, C, X(13), 7, 0);
102        (void)HOST_c2l(data, l);
103        X(15) = l;
104        R0(C, D, A, B, X(14), 11, 0);
105        R0(B, C, D, A, X(15), 19, 0);
106        /* Round 1 */
107        R1(A, B, C, D, X(0), 3, 0x5A827999L);
108        R1(D, A, B, C, X(4), 5, 0x5A827999L);
109        R1(C, D, A, B, X(8), 9, 0x5A827999L);
110        R1(B, C, D, A, X(12), 13, 0x5A827999L);
111        R1(A, B, C, D, X(1), 3, 0x5A827999L);
112        R1(D, A, B, C, X(5), 5, 0x5A827999L);
113        R1(C, D, A, B, X(9), 9, 0x5A827999L);
114        R1(B, C, D, A, X(13), 13, 0x5A827999L);
115        R1(A, B, C, D, X(2), 3, 0x5A827999L);
116        R1(D, A, B, C, X(6), 5, 0x5A827999L);
117        R1(C, D, A, B, X(10), 9, 0x5A827999L);
118        R1(B, C, D, A, X(14), 13, 0x5A827999L);
119        R1(A, B, C, D, X(3), 3, 0x5A827999L);
120        R1(D, A, B, C, X(7), 5, 0x5A827999L);
121        R1(C, D, A, B, X(11), 9, 0x5A827999L);
122        R1(B, C, D, A, X(15), 13, 0x5A827999L);
123        /* Round 2 */
124        R2(A, B, C, D, X(0), 3, 0x6ED9EBA1L);
125        R2(D, A, B, C, X(8), 9, 0x6ED9EBA1L);
126        R2(C, D, A, B, X(4), 11, 0x6ED9EBA1L);
127        R2(B, C, D, A, X(12), 15, 0x6ED9EBA1L);
128        R2(A, B, C, D, X(2), 3, 0x6ED9EBA1L);
129        R2(D, A, B, C, X(10), 9, 0x6ED9EBA1L);
130        R2(C, D, A, B, X(6), 11, 0x6ED9EBA1L);
131        R2(B, C, D, A, X(14), 15, 0x6ED9EBA1L);
132        R2(A, B, C, D, X(1), 3, 0x6ED9EBA1L);
133        R2(D, A, B, C, X(9), 9, 0x6ED9EBA1L);
134        R2(C, D, A, B, X(5), 11, 0x6ED9EBA1L);
135        R2(B, C, D, A, X(13), 15, 0x6ED9EBA1L);
136        R2(A, B, C, D, X(3), 3, 0x6ED9EBA1L);
137        R2(D, A, B, C, X(11), 9, 0x6ED9EBA1L);
138        R2(C, D, A, B, X(7), 11, 0x6ED9EBA1L);
139        R2(B, C, D, A, X(15), 15, 0x6ED9EBA1L);
140
141        A = c->A += A;
142        B = c->B += B;
143        C = c->C += C;
144        D = c->D += D;
145    }
146}
147#endif
148