crypto/openssl/crypto/mdc2/mdc2dgst.c

   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 fips_md_init(MDC2)
  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 }
  87
  88 int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
  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 }
 119
 120 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     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 }
 158
 159 int MDC2_Final(unsigned char *md, MDC2_CTX *c)
 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 }
 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