1*c9496f6bSchristos /* crypto/des/cbc_cksm.c */
2*c9496f6bSchristos /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*c9496f6bSchristos * All rights reserved.
4*c9496f6bSchristos *
5*c9496f6bSchristos * This package is an SSL implementation written
6*c9496f6bSchristos * by Eric Young (eay@cryptsoft.com).
7*c9496f6bSchristos * The implementation was written so as to conform with Netscapes SSL.
8*c9496f6bSchristos *
9*c9496f6bSchristos * This library is free for commercial and non-commercial use as long as
10*c9496f6bSchristos * the following conditions are aheared to. The following conditions
11*c9496f6bSchristos * apply to all code found in this distribution, be it the RC4, RSA,
12*c9496f6bSchristos * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13*c9496f6bSchristos * included with this distribution is covered by the same copyright terms
14*c9496f6bSchristos * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*c9496f6bSchristos *
16*c9496f6bSchristos * Copyright remains Eric Young's, and as such any Copyright notices in
17*c9496f6bSchristos * the code are not to be removed.
18*c9496f6bSchristos * If this package is used in a product, Eric Young should be given attribution
19*c9496f6bSchristos * as the author of the parts of the library used.
20*c9496f6bSchristos * This can be in the form of a textual message at program startup or
21*c9496f6bSchristos * in documentation (online or textual) provided with the package.
22*c9496f6bSchristos *
23*c9496f6bSchristos * Redistribution and use in source and binary forms, with or without
24*c9496f6bSchristos * modification, are permitted provided that the following conditions
25*c9496f6bSchristos * are met:
26*c9496f6bSchristos * 1. Redistributions of source code must retain the copyright
27*c9496f6bSchristos * notice, this list of conditions and the following disclaimer.
28*c9496f6bSchristos * 2. Redistributions in binary form must reproduce the above copyright
29*c9496f6bSchristos * notice, this list of conditions and the following disclaimer in the
30*c9496f6bSchristos * documentation and/or other materials provided with the distribution.
31*c9496f6bSchristos * 3. All advertising materials mentioning features or use of this software
32*c9496f6bSchristos * must display the following acknowledgement:
33*c9496f6bSchristos * "This product includes cryptographic software written by
34*c9496f6bSchristos * Eric Young (eay@cryptsoft.com)"
35*c9496f6bSchristos * The word 'cryptographic' can be left out if the rouines from the library
36*c9496f6bSchristos * being used are not cryptographic related :-).
37*c9496f6bSchristos * 4. If you include any Windows specific code (or a derivative thereof) from
38*c9496f6bSchristos * the apps directory (application code) you must include an acknowledgement:
39*c9496f6bSchristos * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*c9496f6bSchristos *
41*c9496f6bSchristos * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*c9496f6bSchristos * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*c9496f6bSchristos * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*c9496f6bSchristos * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*c9496f6bSchristos * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*c9496f6bSchristos * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*c9496f6bSchristos * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*c9496f6bSchristos * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*c9496f6bSchristos * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*c9496f6bSchristos * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*c9496f6bSchristos * SUCH DAMAGE.
52*c9496f6bSchristos *
53*c9496f6bSchristos * The licence and distribution terms for any publically available version or
54*c9496f6bSchristos * derivative of this code cannot be changed. i.e. this code cannot simply be
55*c9496f6bSchristos * copied and put under another distribution licence
56*c9496f6bSchristos * [including the GNU Public Licence.]
57*c9496f6bSchristos */
58*c9496f6bSchristos
59*c9496f6bSchristos #include "des_locl.h"
60*c9496f6bSchristos
des_cbc_cksum(const unsigned char * in,des_cblock * output,long length,des_key_schedule schedule,const_des_cblock * ivec)61*c9496f6bSchristos DES_LONG des_cbc_cksum(const unsigned char *in, des_cblock *output,
62*c9496f6bSchristos long length,
63*c9496f6bSchristos des_key_schedule schedule, const_des_cblock *ivec)
64*c9496f6bSchristos {
65*c9496f6bSchristos register DES_LONG tout0,tout1,tin0,tin1;
66*c9496f6bSchristos register long l=length;
67*c9496f6bSchristos DES_LONG tin[2];
68*c9496f6bSchristos unsigned char *out = &(*output)[0];
69*c9496f6bSchristos const unsigned char *iv = &(*ivec)[0];
70*c9496f6bSchristos
71*c9496f6bSchristos c2l(iv,tout0);
72*c9496f6bSchristos c2l(iv,tout1);
73*c9496f6bSchristos for (; l>0; l-=8)
74*c9496f6bSchristos {
75*c9496f6bSchristos if (l >= 8)
76*c9496f6bSchristos {
77*c9496f6bSchristos c2l(in,tin0);
78*c9496f6bSchristos c2l(in,tin1);
79*c9496f6bSchristos }
80*c9496f6bSchristos else
81*c9496f6bSchristos c2ln(in,tin0,tin1,l);
82*c9496f6bSchristos
83*c9496f6bSchristos tin0^=tout0; tin[0]=tin0;
84*c9496f6bSchristos tin1^=tout1; tin[1]=tin1;
85*c9496f6bSchristos des_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT);
86*c9496f6bSchristos /* fix 15/10/91 eay - thanks to keithr@sco.COM */
87*c9496f6bSchristos tout0=tin[0];
88*c9496f6bSchristos tout1=tin[1];
89*c9496f6bSchristos }
90*c9496f6bSchristos if (out != NULL)
91*c9496f6bSchristos {
92*c9496f6bSchristos l2c(tout0,out);
93*c9496f6bSchristos l2c(tout1,out);
94*c9496f6bSchristos }
95*c9496f6bSchristos tout0=tin0=tin1=tin[0]=tin[1]=0;
96*c9496f6bSchristos return(tout1);
97*c9496f6bSchristos }
98