1*0Sstevel@tonic-gate /* crypto/des/cbc_cksm.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate * All rights reserved.
4*0Sstevel@tonic-gate *
5*0Sstevel@tonic-gate * This package is an SSL implementation written
6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions
11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate *
16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate * the code are not to be removed.
18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate * as the author of the parts of the library used.
20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate *
23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate * are met:
26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate * must display the following acknowledgement:
33*0Sstevel@tonic-gate * "This product includes cryptographic software written by
34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate * being used are not cryptographic related :-).
37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate *
41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate * SUCH DAMAGE.
52*0Sstevel@tonic-gate *
53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be
55*0Sstevel@tonic-gate * copied and put under another distribution licence
56*0Sstevel@tonic-gate * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate */
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate #include "des_locl.h"
60*0Sstevel@tonic-gate
DES_cbc_cksum(const unsigned char * in,DES_cblock * output,long length,DES_key_schedule * schedule,const_DES_cblock * ivec)61*0Sstevel@tonic-gate DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output,
62*0Sstevel@tonic-gate long length, DES_key_schedule *schedule,
63*0Sstevel@tonic-gate const_DES_cblock *ivec)
64*0Sstevel@tonic-gate {
65*0Sstevel@tonic-gate register DES_LONG tout0,tout1,tin0,tin1;
66*0Sstevel@tonic-gate register long l=length;
67*0Sstevel@tonic-gate DES_LONG tin[2];
68*0Sstevel@tonic-gate unsigned char *out = &(*output)[0];
69*0Sstevel@tonic-gate const unsigned char *iv = &(*ivec)[0];
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate c2l(iv,tout0);
72*0Sstevel@tonic-gate c2l(iv,tout1);
73*0Sstevel@tonic-gate for (; l>0; l-=8)
74*0Sstevel@tonic-gate {
75*0Sstevel@tonic-gate if (l >= 8)
76*0Sstevel@tonic-gate {
77*0Sstevel@tonic-gate c2l(in,tin0);
78*0Sstevel@tonic-gate c2l(in,tin1);
79*0Sstevel@tonic-gate }
80*0Sstevel@tonic-gate else
81*0Sstevel@tonic-gate c2ln(in,tin0,tin1,l);
82*0Sstevel@tonic-gate
83*0Sstevel@tonic-gate tin0^=tout0; tin[0]=tin0;
84*0Sstevel@tonic-gate tin1^=tout1; tin[1]=tin1;
85*0Sstevel@tonic-gate DES_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT);
86*0Sstevel@tonic-gate /* fix 15/10/91 eay - thanks to keithr@sco.COM */
87*0Sstevel@tonic-gate tout0=tin[0];
88*0Sstevel@tonic-gate tout1=tin[1];
89*0Sstevel@tonic-gate }
90*0Sstevel@tonic-gate if (out != NULL)
91*0Sstevel@tonic-gate {
92*0Sstevel@tonic-gate l2c(tout0,out);
93*0Sstevel@tonic-gate l2c(tout1,out);
94*0Sstevel@tonic-gate }
95*0Sstevel@tonic-gate tout0=tin0=tin1=tin[0]=tin[1]=0;
96*0Sstevel@tonic-gate /*
97*0Sstevel@tonic-gate Transform the data in tout1 so that it will
98*0Sstevel@tonic-gate match the return value that the MIT Kerberos
99*0Sstevel@tonic-gate mit_des_cbc_cksum API returns.
100*0Sstevel@tonic-gate */
101*0Sstevel@tonic-gate tout1 = ((tout1 >> 24L) & 0x000000FF)
102*0Sstevel@tonic-gate | ((tout1 >> 8L) & 0x0000FF00)
103*0Sstevel@tonic-gate | ((tout1 << 8L) & 0x00FF0000)
104*0Sstevel@tonic-gate | ((tout1 << 24L) & 0xFF000000);
105*0Sstevel@tonic-gate return(tout1);
106*0Sstevel@tonic-gate }
107