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authorcvs2svn <admin@example.com>2015-08-02 21:54:22 +0000
committercvs2svn <admin@example.com>2015-08-02 21:54:22 +0000
commited3760bf4be4a96a89233fb8f8b84a0d44725862 (patch)
tree5609c82060f75c53af0a7641d9b33a88574876cd /src/lib/libcrypto/des/ofb64ede.c
parentf8b563fb5ba1524c821d37308f4e6abfc866bc3f (diff)
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1/* $OpenBSD: ofb64ede.c,v 1.6 2015/02/07 13:19:15 doug Exp $ */
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/* The input and output encrypted as though 64bit ofb mode is being
62 * used. The extra state information to record how much of the
63 * 64bit block we have used is contained in *num;
64 */
65void DES_ede3_ofb64_encrypt(const unsigned char *in,
66 unsigned char *out, long length,
67 DES_key_schedule *k1, DES_key_schedule *k2,
68 DES_key_schedule *k3, DES_cblock *ivec,
69 int *num)
70 {
71 DES_LONG v0,v1;
72 int n= *num;
73 long l=length;
74 DES_cblock d;
75 char *dp;
76 DES_LONG ti[2];
77 unsigned char *iv;
78 int save=0;
79
80 iv = &(*ivec)[0];
81 c2l(iv,v0);
82 c2l(iv,v1);
83 ti[0]=v0;
84 ti[1]=v1;
85 dp=(char *)d;
86 l2c(v0,dp);
87 l2c(v1,dp);
88 while (l--)
89 {
90 if (n == 0)
91 {
92 /* ti[0]=v0; */
93 /* ti[1]=v1; */
94 DES_encrypt3(ti,k1,k2,k3);
95 v0=ti[0];
96 v1=ti[1];
97
98 dp=(char *)d;
99 l2c(v0,dp);
100 l2c(v1,dp);
101 save++;
102 }
103 *(out++)= *(in++)^d[n];
104 n=(n+1)&0x07;
105 }
106 if (save)
107 {
108 iv = &(*ivec)[0];
109 l2c(v0,iv);
110 l2c(v1,iv);
111 }
112 v0=v1=ti[0]=ti[1]=0;
113 *num=n;
114 }