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d02b48c6 | 1 | /* crypto/des/cbc_cksm.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
40720ce3 | 8 | * |
d02b48c6 RE |
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). | |
40720ce3 | 15 | * |
d02b48c6 RE |
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. | |
40720ce3 | 22 | * |
d02b48c6 RE |
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 :-). | |
40720ce3 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40720ce3 | 40 | * |
d02b48c6 RE |
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. | |
40720ce3 | 52 | * |
d02b48c6 RE |
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 | ||
c2e4f17c | 61 | DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output, |
40720ce3 MC |
62 | long length, DES_key_schedule *schedule, |
63 | const_DES_cblock *ivec) | |
64 | { | |
65 | register DES_LONG tout0, tout1, tin0, tin1; | |
66 | register long l = length; | |
67 | DES_LONG tin[2]; | |
68 | unsigned char *out = &(*output)[0]; | |
69 | const unsigned char *iv = &(*ivec)[0]; | |
70 | ||
71 | c2l(iv, tout0); | |
72 | c2l(iv, tout1); | |
73 | for (; l > 0; l -= 8) { | |
74 | if (l >= 8) { | |
75 | c2l(in, tin0); | |
76 | c2l(in, tin1); | |
77 | } else | |
78 | c2ln(in, tin0, tin1, l); | |
d02b48c6 | 79 | |
40720ce3 MC |
80 | tin0 ^= tout0; |
81 | tin[0] = tin0; | |
82 | tin1 ^= tout1; | |
83 | tin[1] = tin1; | |
84 | DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT); | |
85 | /* fix 15/10/91 eay - thanks to keithr@sco.COM */ | |
86 | tout0 = tin[0]; | |
87 | tout1 = tin[1]; | |
88 | } | |
89 | if (out != NULL) { | |
90 | l2c(tout0, out); | |
91 | l2c(tout1, out); | |
92 | } | |
93 | tout0 = tin0 = tin1 = tin[0] = tin[1] = 0; | |
94 | /* | |
95 | * Transform the data in tout1 so that it will match the return value | |
96 | * that the MIT Kerberos mit_des_cbc_cksum API returns. | |
97 | */ | |
98 | tout1 = ((tout1 >> 24L) & 0x000000FF) | |
99 | | ((tout1 >> 8L) & 0x0000FF00) | |
100 | | ((tout1 << 8L) & 0x00FF0000) | |
101 | | ((tout1 << 24L) & 0xFF000000); | |
102 | return (tout1); | |
103 | } |