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      1 /* crypto/mdc2/mdc2dgst.c */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 		{
     95 		if (i+len < MDC2_BLOCK)
     96 			{
     97 			/* partial block */
     98 			memcpy(&(c->data[i]),in,len);
     99 			c->num+=(int)len;
    100 			return 1;
    101 			}
    102 		else
    103 			{
    104 			/* filled one */
    105 			j=MDC2_BLOCK-i;
    106 			memcpy(&(c->data[i]),in,j);
    107 			len-=j;
    108 			in+=j;
    109 			c->num=0;
    110 			mdc2_body(c,&(c->data[0]),MDC2_BLOCK);
    111 			}
    112 		}
    113 	i=len&~((size_t)MDC2_BLOCK-1);
    114 	if (i > 0) mdc2_body(c,in,i);
    115 	j=len-i;
    116 	if (j > 0)
    117 		{
    118 		memcpy(&(c->data[0]),&(in[i]),j);
    119 		c->num=(int)j;
    120 		}
    121 	return 1;
    122 	}
    123 
    124 static void mdc2_body(MDC2_CTX *c, const unsigned char *in, size_t len)
    125 	{
    126 	register DES_LONG tin0,tin1;
    127 	register DES_LONG ttin0,ttin1;
    128 	DES_LONG d[2],dd[2];
    129 	DES_key_schedule k;
    130 	unsigned char *p;
    131 	size_t i;
    132 
    133 	for (i=0; i<len; i+=8)
    134 		{
    135 		c2l(in,tin0); d[0]=dd[0]=tin0;
    136 		c2l(in,tin1); 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 
    162 int 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 		{
    171 		if (j == 2)
    172 			c->data[i++]=0x80;
    173 		memset(&(c->data[i]),0,MDC2_BLOCK-i);
    174 		mdc2_body(c,c->data,MDC2_BLOCK);
    175 		}
    176 	memcpy(md,(char *)c->h,MDC2_BLOCK);
    177 	memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK);
    178 	return 1;
    179 	}
    180 
    181 #undef TEST
    182 
    183 #ifdef TEST
    184 main()
    185 	{
    186 	unsigned char md[MDC2_DIGEST_LENGTH];
    187 	int i;
    188 	MDC2_CTX c;
    189 	static char *text="Now is the time for all ";
    190 
    191 	MDC2_Init(&c);
    192 	MDC2_Update(&c,text,strlen(text));
    193 	MDC2_Final(&(md[0]),&c);
    194 
    195 	for (i=0; i<MDC2_DIGEST_LENGTH; i++)
    196 		printf("%02X",md[i]);
    197 	printf("\n");
    198 	}
    199 
    200 #endif
    201