Line data Source code
1 : /* crypto/mdc2/mdc2dgst.c */
2 : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : * All rights reserved.
4 : *
5 : * This package is an SSL implementation written
6 : * by Eric Young (eay@cryptsoft.com).
7 : * The implementation was written so as to conform with Netscapes SSL.
8 : *
9 : * This library is free for commercial and non-commercial use as long as
10 : * the following conditions are aheared to. The following conditions
11 : * apply to all code found in this distribution, be it the RC4, RSA,
12 : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 : * included with this distribution is covered by the same copyright terms
14 : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 : *
16 : * Copyright remains Eric Young's, and as such any Copyright notices in
17 : * the code are not to be removed.
18 : * If this package is used in a product, Eric Young should be given attribution
19 : * as the author of the parts of the library used.
20 : * This can be in the form of a textual message at program startup or
21 : * in documentation (online or textual) provided with the package.
22 : *
23 : * Redistribution and use in source and binary forms, with or without
24 : * modification, are permitted provided that the following conditions
25 : * are met:
26 : * 1. Redistributions of source code must retain the copyright
27 : * notice, this list of conditions and the following disclaimer.
28 : * 2. Redistributions in binary form must reproduce the above copyright
29 : * notice, this list of conditions and the following disclaimer in the
30 : * documentation and/or other materials provided with the distribution.
31 : * 3. All advertising materials mentioning features or use of this software
32 : * must display the following acknowledgement:
33 : * "This product includes cryptographic software written by
34 : * Eric Young (eay@cryptsoft.com)"
35 : * The word 'cryptographic' can be left out if the rouines from the library
36 : * being used are not cryptographic related :-).
37 : * 4. If you include any Windows specific code (or a derivative thereof) from
38 : * the apps directory (application code) you must include an acknowledgement:
39 : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 : *
41 : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 : * SUCH DAMAGE.
52 : *
53 : * The licence and distribution terms for any publically available version or
54 : * derivative of this code cannot be changed. i.e. this code cannot simply be
55 : * copied and put under another distribution licence
56 : * [including the GNU Public Licence.]
57 : */
58 :
59 : #include <stdio.h>
60 : #include <stdlib.h>
61 : #include <string.h>
62 : #include <openssl/crypto.h>
63 : #include <openssl/des.h>
64 : #include <openssl/mdc2.h>
65 :
66 : #undef c2l
67 : #define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
68 : l|=((DES_LONG)(*((c)++)))<< 8L, \
69 : l|=((DES_LONG)(*((c)++)))<<16L, \
70 : l|=((DES_LONG)(*((c)++)))<<24L)
71 :
72 : #undef l2c
73 : #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
74 : *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
75 : *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
76 : *((c)++)=(unsigned char)(((l)>>24L)&0xff))
77 :
78 : static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
79 0 : fips_md_init(MDC2)
80 : {
81 0 : c->num = 0;
82 0 : c->pad_type = 1;
83 0 : memset(&(c->h[0]), 0x52, MDC2_BLOCK);
84 : memset(&(c->hh[0]), 0x25, MDC2_BLOCK);
85 0 : return 1;
86 : }
87 :
88 0 : int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
89 : {
90 : size_t i, j;
91 :
92 0 : i = c->num;
93 0 : if (i != 0) {
94 0 : if (i + len < MDC2_BLOCK) {
95 : /* partial block */
96 0 : memcpy(&(c->data[i]), in, len);
97 0 : c->num += (int)len;
98 0 : return 1;
99 : } else {
100 : /* filled one */
101 0 : j = MDC2_BLOCK - i;
102 0 : memcpy(&(c->data[i]), in, j);
103 0 : len -= j;
104 0 : in += j;
105 0 : c->num = 0;
106 0 : mdc2_body(c, &(c->data[0]), MDC2_BLOCK);
107 : }
108 : }
109 0 : i = len & ~((size_t)MDC2_BLOCK - 1);
110 0 : if (i > 0)
111 0 : mdc2_body(c, in, i);
112 0 : j = len - i;
113 0 : if (j > 0) {
114 0 : memcpy(&(c->data[0]), &(in[i]), j);
115 0 : c->num = (int)j;
116 : }
117 : return 1;
118 : }
119 :
120 0 : static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
121 : {
122 : register DES_LONG tin0, tin1;
123 : register DES_LONG ttin0, ttin1;
124 : DES_LONG d[2], dd[2];
125 : DES_key_schedule k;
126 : unsigned char *p;
127 : size_t i;
128 :
129 0 : for (i = 0; i < len; i += 8) {
130 0 : c2l(in, tin0);
131 0 : d[0] = dd[0] = tin0;
132 0 : c2l(in, tin1);
133 0 : d[1] = dd[1] = tin1;
134 0 : c->h[0] = (c->h[0] & 0x9f) | 0x40;
135 0 : c->hh[0] = (c->hh[0] & 0x9f) | 0x20;
136 :
137 0 : DES_set_odd_parity(&c->h);
138 0 : DES_set_key_unchecked(&c->h, &k);
139 0 : DES_encrypt1(d, &k, 1);
140 :
141 0 : DES_set_odd_parity(&c->hh);
142 0 : DES_set_key_unchecked(&c->hh, &k);
143 0 : DES_encrypt1(dd, &k, 1);
144 :
145 0 : ttin0 = tin0 ^ dd[0];
146 0 : ttin1 = tin1 ^ dd[1];
147 0 : tin0 ^= d[0];
148 0 : tin1 ^= d[1];
149 :
150 : p = c->h;
151 0 : l2c(tin0, p);
152 0 : l2c(ttin1, p);
153 : p = c->hh;
154 0 : l2c(ttin0, p);
155 0 : l2c(tin1, p);
156 : }
157 0 : }
158 :
159 0 : int MDC2_Final(unsigned char *md, MDC2_CTX *c)
160 : {
161 : unsigned int i;
162 : int j;
163 :
164 0 : i = c->num;
165 0 : j = c->pad_type;
166 0 : if ((i > 0) || (j == 2)) {
167 0 : if (j == 2)
168 0 : c->data[i++] = 0x80;
169 0 : memset(&(c->data[i]), 0, MDC2_BLOCK - i);
170 0 : mdc2_body(c, c->data, MDC2_BLOCK);
171 : }
172 0 : memcpy(md, (char *)c->h, MDC2_BLOCK);
173 0 : memcpy(&(md[MDC2_BLOCK]), (char *)c->hh, MDC2_BLOCK);
174 0 : return 1;
175 : }
176 :
177 : #undef TEST
178 :
179 : #ifdef TEST
180 : main()
181 : {
182 : unsigned char md[MDC2_DIGEST_LENGTH];
183 : int i;
184 : MDC2_CTX c;
185 : static char *text = "Now is the time for all ";
186 :
187 : MDC2_Init(&c);
188 : MDC2_Update(&c, text, strlen(text));
189 : MDC2_Final(&(md[0]), &c);
190 :
191 : for (i = 0; i < MDC2_DIGEST_LENGTH; i++)
192 : printf("%02X", md[i]);
193 : printf("\n");
194 : }
195 :
196 : #endif
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