1 /* crypto/des/rpc_enc.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 "rpc_des.h"
60 #include "des_locl.h"
61 #include "des_ver.h"
62
63 int _des_crypt(char *buf,int len,struct desparams *desp);
64 int _des_crypt(char *buf, int len, struct desparams *desp)
65 {
66 DES_key_schedule ks;
67 int enc;
68
69 DES_set_key_unchecked(&desp->des_key,&ks);
70 enc=(desp->des_dir == ENCRYPT)?DES_ENCRYPT:DES_DECRYPT;
71
72 if (desp->des_mode == CBC)
73 DES_ecb_encrypt((const_DES_cblock *)desp->UDES.UDES_buf,
74 (DES_cblock *)desp->UDES.UDES_buf,&ks,
75 enc);
76 else
77 {
78 DES_ncbc_encrypt(desp->UDES.UDES_buf,desp->UDES.UDES_buf,
79 len,&ks,&desp->des_ivec,enc);
80 #ifdef undef
81 /* len will always be %8 if called from common_crypt
82 * in secure_rpc.
83 * Libdes's cbc encrypt does not copy back the iv,
84 * so we have to do it here. */
85 /* It does now :-) eay 20/09/95 */
86
87 a=(char *)&(desp->UDES.UDES_buf[len-8]);
88 b=(char *)&(desp->des_ivec[0]);
89
90 *(a++)= *(b++); *(a++)= *(b++);
91 *(a++)= *(b++); *(a++)= *(b++);
92 *(a++)= *(b++); *(a++)= *(b++);
93 *(a++)= *(b++); *(a++)= *(b++);
94 #endif
95 }
96 return(1);
97 }