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1 : : /* crypto/des/cbc_cksm.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 "des_locl.h"
60 : :
61 : 1 : DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output,
62 : : long length, DES_key_schedule *schedule,
63 : : const_DES_cblock *ivec)
64 : : {
65 : : register DES_LONG tout0,tout1,tin0,tin1;
66 : 1 : register long l=length;
67 : : DES_LONG tin[2];
68 : 1 : unsigned char *out = &(*output)[0];
69 : 1 : const unsigned char *iv = &(*ivec)[0];
70 : :
71 : 1 : c2l(iv,tout0);
72 : 1 : c2l(iv,tout1);
73 [ + + ]: 5 : for (; l>0; l-=8)
74 : : {
75 [ + + ]: 4 : if (l >= 8)
76 : : {
77 : 3 : c2l(in,tin0);
78 : 3 : c2l(in,tin1);
79 : : }
80 : : else
81 [ - - - - : 1 : c2ln(in,tin0,tin1,l);
+ - - -
- ]
82 : :
83 : 4 : tin0^=tout0; tin[0]=tin0;
84 : 4 : tin1^=tout1; tin[1]=tin1;
85 : 4 : DES_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT);
86 : : /* fix 15/10/91 eay - thanks to keithr@sco.COM */
87 : 4 : tout0=tin[0];
88 : 4 : tout1=tin[1];
89 : : }
90 [ + - ]: 1 : if (out != NULL)
91 : : {
92 : 1 : l2c(tout0,out);
93 : 1 : l2c(tout1,out);
94 : : }
95 : 1 : tout0=tin0=tin1=tin[0]=tin[1]=0;
96 : : /*
97 : : Transform the data in tout1 so that it will
98 : : match the return value that the MIT Kerberos
99 : : mit_des_cbc_cksum API returns.
100 : : */
101 : 2 : tout1 = ((tout1 >> 24L) & 0x000000FF)
102 : 1 : | ((tout1 >> 8L) & 0x0000FF00)
103 : 1 : | ((tout1 << 8L) & 0x00FF0000)
104 : 1 : | ((tout1 << 24L) & 0xFF000000);
105 : 1 : return(tout1);
106 : : }
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