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d02b48c6 | 1 | /* crypto/mdc2/mdc2dgst.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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> | |
a3654f05 | 62 | #include <openssl/crypto.h> |
ec577822 BM |
63 | #include <openssl/des.h> |
64 | #include <openssl/mdc2.h> | |
d02b48c6 RE |
65 | |
66 | #undef c2l | |
0f113f3e MC |
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) | |
d02b48c6 RE |
71 | |
72 | #undef l2c | |
0f113f3e MC |
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)) | |
d02b48c6 | 77 | |
9e0aad9f | 78 | static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len); |
2dc769a1 | 79 | int MDC2_Init(MDC2_CTX *c) |
0f113f3e MC |
80 | { |
81 | c->num = 0; | |
82 | c->pad_type = 1; | |
83 | memset(&(c->h[0]), 0x52, MDC2_BLOCK); | |
84 | memset(&(c->hh[0]), 0x25, MDC2_BLOCK); | |
85 | return 1; | |
86 | } | |
d02b48c6 | 87 | |
9e0aad9f | 88 | int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len) |
0f113f3e MC |
89 | { |
90 | size_t i, j; | |
91 | ||
92 | i = c->num; | |
93 | if (i != 0) { | |
94 | if (i + len < MDC2_BLOCK) { | |
95 | /* partial block */ | |
96 | memcpy(&(c->data[i]), in, len); | |
97 | c->num += (int)len; | |
98 | return 1; | |
99 | } else { | |
100 | /* filled one */ | |
101 | j = MDC2_BLOCK - i; | |
102 | memcpy(&(c->data[i]), in, j); | |
103 | len -= j; | |
104 | in += j; | |
105 | c->num = 0; | |
106 | mdc2_body(c, &(c->data[0]), MDC2_BLOCK); | |
107 | } | |
108 | } | |
109 | i = len & ~((size_t)MDC2_BLOCK - 1); | |
110 | if (i > 0) | |
111 | mdc2_body(c, in, i); | |
112 | j = len - i; | |
113 | if (j > 0) { | |
114 | memcpy(&(c->data[0]), &(in[i]), j); | |
115 | c->num = (int)j; | |
116 | } | |
117 | return 1; | |
118 | } | |
d02b48c6 | 119 | |
9e0aad9f | 120 | static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len) |
0f113f3e MC |
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 | for (i = 0; i < len; i += 8) { | |
130 | c2l(in, tin0); | |
131 | d[0] = dd[0] = tin0; | |
132 | c2l(in, tin1); | |
133 | d[1] = dd[1] = tin1; | |
134 | c->h[0] = (c->h[0] & 0x9f) | 0x40; | |
135 | c->hh[0] = (c->hh[0] & 0x9f) | 0x20; | |
136 | ||
137 | DES_set_odd_parity(&c->h); | |
138 | DES_set_key_unchecked(&c->h, &k); | |
139 | DES_encrypt1(d, &k, 1); | |
140 | ||
141 | DES_set_odd_parity(&c->hh); | |
142 | DES_set_key_unchecked(&c->hh, &k); | |
143 | DES_encrypt1(dd, &k, 1); | |
144 | ||
145 | ttin0 = tin0 ^ dd[0]; | |
146 | ttin1 = tin1 ^ dd[1]; | |
147 | tin0 ^= d[0]; | |
148 | tin1 ^= d[1]; | |
149 | ||
150 | p = c->h; | |
151 | l2c(tin0, p); | |
152 | l2c(ttin1, p); | |
153 | p = c->hh; | |
154 | l2c(ttin0, p); | |
155 | l2c(tin1, p); | |
156 | } | |
157 | } | |
d02b48c6 | 158 | |
2dc769a1 | 159 | int MDC2_Final(unsigned char *md, MDC2_CTX *c) |
0f113f3e MC |
160 | { |
161 | unsigned int i; | |
162 | int j; | |
163 | ||
164 | i = c->num; | |
165 | j = c->pad_type; | |
166 | if ((i > 0) || (j == 2)) { | |
167 | if (j == 2) | |
168 | c->data[i++] = 0x80; | |
169 | memset(&(c->data[i]), 0, MDC2_BLOCK - i); | |
170 | mdc2_body(c, c->data, MDC2_BLOCK); | |
171 | } | |
172 | memcpy(md, (char *)c->h, MDC2_BLOCK); | |
173 | memcpy(&(md[MDC2_BLOCK]), (char *)c->hh, MDC2_BLOCK); | |
174 | return 1; | |
175 | } | |
d02b48c6 RE |
176 | |
177 | #undef TEST | |
178 | ||
179 | #ifdef TEST | |
180 | main() | |
0f113f3e MC |
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 | } | |
d02b48c6 RE |
195 | |
196 | #endif |