1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30 /*
31 * des_crypt.c, DES encryption library routines
32 * Copyright (C) 1986, Sun Microsystems, Inc.
33 */
34
35 #include <sys/types.h>
36 #include <rpc/des_crypt.h>
37 #include <rpc/des.h>
38
39 #if defined(LIBC_SCCS) && !defined(lint)
40 static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI";
41 #endif
42 static int common_crypt( char *, char *, unsigned, unsigned, struct desparams * );
43 int (*__des_crypt_LOCAL)(char *, unsigned, struct desparams *) = 0;
44 extern int _des_crypt_call(char *, int, struct desparams *);
45 /*
46 * Copy 8 bytes
47 */
48 #define COPY8(src, dst) { \
49 char *a = (char *) dst; \
50 char *b = (char *) src; \
51 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
52 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
53 }
54
55 /*
56 * Copy multiple of 8 bytes
57 */
58 #define DESCOPY(src, dst, len) { \
59 char *a = (char *) dst; \
60 char *b = (char *) src; \
61 int i; \
62 for (i = (int) len; i > 0; i -= 8) { \
63 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
64 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
65 } \
66 }
67
68 /*
69 * CBC mode encryption
70 */
71 int
cbc_crypt(char * key,char * buf,unsigned len,unsigned mode,char * ivec)72 cbc_crypt(char *key, char *buf, unsigned len, unsigned mode, char *ivec)
73 {
74 int err;
75 struct desparams dp;
76
77 #ifdef BROKEN_DES
78 dp.UDES.UDES_buf = buf;
79 dp.des_mode = ECB;
80 #else
81 dp.des_mode = CBC;
82 #endif
83 COPY8(ivec, dp.des_ivec);
84 err = common_crypt(key, buf, len, mode, &dp);
85 COPY8(dp.des_ivec, ivec);
86 return(err);
87 }
88
89
90 /*
91 * ECB mode encryption
92 */
93 int
ecb_crypt(char * key,char * buf,unsigned len,unsigned mode)94 ecb_crypt(char *key, char *buf, unsigned len, unsigned mode)
95 {
96 struct desparams dp;
97
98 #ifdef BROKEN_DES
99 dp.UDES.UDES_buf = buf;
100 dp.des_mode = CBC;
101 #else
102 dp.des_mode = ECB;
103 #endif
104 return(common_crypt(key, buf, len, mode, &dp));
105 }
106
107
108
109 /*
110 * Common code to cbc_crypt() & ecb_crypt()
111 */
112 static int
common_crypt(char * key,char * buf,unsigned len,unsigned mode,struct desparams * desp)113 common_crypt(char *key, char *buf, unsigned len, unsigned mode,
114 struct desparams *desp)
115 {
116 int desdev;
117
118 if ((len % 8) != 0 || len > DES_MAXDATA) {
119 return(DESERR_BADPARAM);
120 }
121 desp->des_dir =
122 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
123
124 desdev = mode & DES_DEVMASK;
125 COPY8(key, desp->des_key);
126 /*
127 * software
128 */
129 if (__des_crypt_LOCAL != NULL) {
130 if (!__des_crypt_LOCAL(buf, len, desp)) {
131 return (DESERR_HWERROR);
132 }
133 } else {
134 if (!_des_crypt_call(buf, len, desp)) {
135 return (DESERR_HWERROR);
136 }
137 }
138 return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE);
139 }
140