197 lines
6.4 KiB
C
197 lines
6.4 KiB
C
/* crypto/mdc2/mdc2dgst.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/crypto.h>
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#include <openssl/des.h>
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#include <openssl/mdc2.h>
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#undef c2l
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#define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
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l|=((DES_LONG)(*((c)++)))<< 8L, \
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l|=((DES_LONG)(*((c)++)))<<16L, \
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l|=((DES_LONG)(*((c)++)))<<24L)
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#undef l2c
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#define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
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*((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
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*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
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*((c)++)=(unsigned char)(((l)>>24L)&0xff))
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static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len);
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fips_md_init(MDC2)
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{
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c->num = 0;
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c->pad_type = 1;
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memset(&(c->h[0]), 0x52, MDC2_BLOCK);
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memset(&(c->hh[0]), 0x25, MDC2_BLOCK);
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return 1;
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}
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int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
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{
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size_t i, j;
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i = c->num;
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if (i != 0) {
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if (len < MDC2_BLOCK - i) {
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/* partial block */
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memcpy(&(c->data[i]), in, len);
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c->num += (int)len;
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return 1;
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} else {
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/* filled one */
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j = MDC2_BLOCK - i;
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memcpy(&(c->data[i]), in, j);
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len -= j;
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in += j;
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c->num = 0;
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mdc2_body(c, &(c->data[0]), MDC2_BLOCK);
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}
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}
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i = len & ~((size_t)MDC2_BLOCK - 1);
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if (i > 0)
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mdc2_body(c, in, i);
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j = len - i;
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if (j > 0) {
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memcpy(&(c->data[0]), &(in[i]), j);
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c->num = (int)j;
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}
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return 1;
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}
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static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
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{
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register DES_LONG tin0, tin1;
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register DES_LONG ttin0, ttin1;
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DES_LONG d[2], dd[2];
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DES_key_schedule k;
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unsigned char *p;
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size_t i;
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for (i = 0; i < len; i += 8) {
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c2l(in, tin0);
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d[0] = dd[0] = tin0;
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c2l(in, tin1);
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d[1] = dd[1] = tin1;
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c->h[0] = (c->h[0] & 0x9f) | 0x40;
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c->hh[0] = (c->hh[0] & 0x9f) | 0x20;
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DES_set_odd_parity(&c->h);
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DES_set_key_unchecked(&c->h, &k);
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DES_encrypt1(d, &k, 1);
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DES_set_odd_parity(&c->hh);
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DES_set_key_unchecked(&c->hh, &k);
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DES_encrypt1(dd, &k, 1);
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ttin0 = tin0 ^ dd[0];
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ttin1 = tin1 ^ dd[1];
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tin0 ^= d[0];
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tin1 ^= d[1];
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p = c->h;
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l2c(tin0, p);
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l2c(ttin1, p);
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p = c->hh;
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l2c(ttin0, p);
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l2c(tin1, p);
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}
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}
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int MDC2_Final(unsigned char *md, MDC2_CTX *c)
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{
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unsigned int i;
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int j;
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i = c->num;
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j = c->pad_type;
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if ((i > 0) || (j == 2)) {
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if (j == 2)
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c->data[i++] = 0x80;
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memset(&(c->data[i]), 0, MDC2_BLOCK - i);
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mdc2_body(c, c->data, MDC2_BLOCK);
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}
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memcpy(md, (char *)c->h, MDC2_BLOCK);
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memcpy(&(md[MDC2_BLOCK]), (char *)c->hh, MDC2_BLOCK);
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return 1;
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}
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#undef TEST
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#ifdef TEST
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main()
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{
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unsigned char md[MDC2_DIGEST_LENGTH];
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int i;
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MDC2_CTX c;
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static char *text = "Now is the time for all ";
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MDC2_Init(&c);
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MDC2_Update(&c, text, strlen(text));
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MDC2_Final(&(md[0]), &c);
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for (i = 0; i < MDC2_DIGEST_LENGTH; i++)
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printf("%02X", md[i]);
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printf("\n");
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}
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#endif
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