mdc2dgst.c revision 306230 
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/des.h>
63#include <openssl/mdc2.h>
64#include <openssl/err.h>
65#ifdef OPENSSL_FIPS
66# include <openssl/fips.h>
67#endif
68
69#undef c2l
70#define c2l(c,l)        (l =((DES_LONG)(*((c)++)))    , \
71                         l|=((DES_LONG)(*((c)++)))<< 8L, \
72                         l|=((DES_LONG)(*((c)++)))<<16L, \
73                         l|=((DES_LONG)(*((c)++)))<<24L)
74
75#undef l2c
76#define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
77                        *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
78                        *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
79                        *((c)++)=(unsigned char)(((l)>>24L)&0xff))
80
81static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
82FIPS_NON_FIPS_MD_Init(MDC2)
83{
84    c->num = 0;
85    c->pad_type = 1;
86    memset(&(c->h[0]), 0x52, MDC2_BLOCK);
87    memset(&(c->hh[0]), 0x25, MDC2_BLOCK);
88    return 1;
89}
90
91int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
92{
93    size_t i, j;
94
95    i = c->num;
96    if (i != 0) {
97        if (len < MDC2_BLOCK - i) {
98            /* partial block */
99            memcpy(&(c->data[i]), in, len);
100            c->num += (int)len;
101            return 1;
102        } else {
103            /* filled one */
104            j = MDC2_BLOCK - i;
105            memcpy(&(c->data[i]), in, j);
106            len -= j;
107            in += j;
108            c->num = 0;
109            mdc2_body(c, &(c->data[0]), MDC2_BLOCK);
110        }
111    }
112    i = len & ~((size_t)MDC2_BLOCK - 1);
113    if (i > 0)
114        mdc2_body(c, in, i);
115    j = len - i;
116    if (j > 0) {
117        memcpy(&(c->data[0]), &(in[i]), j);
118        c->num = (int)j;
119    }
120    return 1;
121}
122
123static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
124{
125    register DES_LONG tin0, tin1;
126    register DES_LONG ttin0, ttin1;
127    DES_LONG d[2], dd[2];
128    DES_key_schedule k;
129    unsigned char *p;
130    size_t i;
131
132    for (i = 0; i < len; i += 8) {
133        c2l(in, tin0);
134        d[0] = dd[0] = tin0;
135        c2l(in, tin1);
136        d[1] = dd[1] = tin1;
137        c->h[0] = (c->h[0] & 0x9f) | 0x40;
138        c->hh[0] = (c->hh[0] & 0x9f) | 0x20;
139
140        DES_set_odd_parity(&c->h);
141        DES_set_key_unchecked(&c->h, &k);
142        DES_encrypt1(d, &k, 1);
143
144        DES_set_odd_parity(&c->hh);
145        DES_set_key_unchecked(&c->hh, &k);
146        DES_encrypt1(dd, &k, 1);
147
148        ttin0 = tin0 ^ dd[0];
149        ttin1 = tin1 ^ dd[1];
150        tin0 ^= d[0];
151        tin1 ^= d[1];
152
153        p = c->h;
154        l2c(tin0, p);
155        l2c(ttin1, p);
156        p = c->hh;
157        l2c(ttin0, p);
158        l2c(tin1, p);
159    }
160}
161
162int MDC2_Final(unsigned char *md, MDC2_CTX *c)
163{
164    unsigned int i;
165    int j;
166
167    i = c->num;
168    j = c->pad_type;
169    if ((i > 0) || (j == 2)) {
170        if (j == 2)
171            c->data[i++] = 0x80;
172        memset(&(c->data[i]), 0, MDC2_BLOCK - i);
173        mdc2_body(c, c->data, MDC2_BLOCK);
174    }
175    memcpy(md, (char *)c->h, MDC2_BLOCK);
176    memcpy(&(md[MDC2_BLOCK]), (char *)c->hh, MDC2_BLOCK);
177    return 1;
178}
179
180#undef TEST
181
182#ifdef TEST
183main()
184{
185    unsigned char md[MDC2_DIGEST_LENGTH];
186    int i;
187    MDC2_CTX c;
188    static char *text = "Now is the time for all ";
189
190    MDC2_Init(&c);
191    MDC2_Update(&c, text, strlen(text));
192    MDC2_Final(&(md[0]), &c);
193
194    for (i = 0; i < MDC2_DIGEST_LENGTH; i++)
195        printf("%02X", md[i]);
196    printf("\n");
197}
198
199#endif
200