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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
57 | ||
58 | #include "des_locl.h" | |
59 | ||
c2e4f17c | 60 | DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output, |
0f113f3e MC |
61 | long length, DES_key_schedule *schedule, |
62 | const_DES_cblock *ivec) | |
63 | { | |
64 | register DES_LONG tout0, tout1, tin0, tin1; | |
65 | register long l = length; | |
66 | DES_LONG tin[2]; | |
67 | unsigned char *out = &(*output)[0]; | |
68 | const unsigned char *iv = &(*ivec)[0]; | |
69 | ||
70 | c2l(iv, tout0); | |
71 | c2l(iv, tout1); | |
72 | for (; l > 0; l -= 8) { | |
73 | if (l >= 8) { | |
74 | c2l(in, tin0); | |
75 | c2l(in, tin1); | |
76 | } else | |
77 | c2ln(in, tin0, tin1, l); | |
d02b48c6 | 78 | |
0f113f3e MC |
79 | tin0 ^= tout0; |
80 | tin[0] = tin0; | |
81 | tin1 ^= tout1; | |
82 | tin[1] = tin1; | |
83 | DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT); | |
84 | /* fix 15/10/91 eay - thanks to keithr@sco.COM */ | |
85 | tout0 = tin[0]; | |
86 | tout1 = tin[1]; | |
87 | } | |
88 | if (out != NULL) { | |
89 | l2c(tout0, out); | |
90 | l2c(tout1, out); | |
91 | } | |
92 | tout0 = tin0 = tin1 = tin[0] = tin[1] = 0; | |
93 | /* | |
94 | * Transform the data in tout1 so that it will match the return value | |
95 | * that the MIT Kerberos mit_des_cbc_cksum API returns. | |
96 | */ | |
97 | tout1 = ((tout1 >> 24L) & 0x000000FF) | |
98 | | ((tout1 >> 8L) & 0x0000FF00) | |
99 | | ((tout1 << 8L) & 0x00FF0000) | |
100 | | ((tout1 << 24L) & 0xFF000000); | |
101 | return (tout1); | |
102 | } |