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 static int common_crypt( char *, char *, unsigned, unsigned, struct desparams * );
40 int (*__des_crypt_LOCAL)(char *, unsigned, struct desparams *) = 0;
41 extern int _des_crypt_call(char *, int, struct desparams *);
42 /*
43 * Copy 8 bytes
44 */
45 #define COPY8(src, dst) { \
46 char *a = (char *) dst; \
47 char *b = (char *) src; \
48 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
49 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
50 }
51
52 /*
53 * Copy multiple of 8 bytes
54 */
55 #define DESCOPY(src, dst, len) { \
56 char *a = (char *) dst; \
57 char *b = (char *) src; \
58 int i; \
59 for (i = (int) len; i > 0; i -= 8) { \
60 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
61 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
62 } \
63 }
64
65 /*
66 * CBC mode encryption
67 */
68 int
cbc_crypt(char * key,char * buf,unsigned len,unsigned mode,char * ivec)69 cbc_crypt(char *key, char *buf, unsigned len, unsigned mode, char *ivec)
70 {
71 int err;
72 struct desparams dp;
73
74 #ifdef BROKEN_DES
75 dp.UDES.UDES_buf = buf;
76 dp.des_mode = ECB;
77 #else
78 dp.des_mode = CBC;
79 #endif
80 COPY8(ivec, dp.des_ivec);
81 err = common_crypt(key, buf, len, mode, &dp);
82 COPY8(dp.des_ivec, ivec);
83 return(err);
84 }
85
86
87 /*
88 * ECB mode encryption
89 */
90 int
ecb_crypt(char * key,char * buf,unsigned len,unsigned mode)91 ecb_crypt(char *key, char *buf, unsigned len, unsigned mode)
92 {
93 struct desparams dp;
94
95 #ifdef BROKEN_DES
96 dp.UDES.UDES_buf = buf;
97 dp.des_mode = CBC;
98 #else
99 dp.des_mode = ECB;
100 #endif
101 return(common_crypt(key, buf, len, mode, &dp));
102 }
103
104
105
106 /*
107 * Common code to cbc_crypt() & ecb_crypt()
108 */
109 static int
common_crypt(char * key,char * buf,unsigned len,unsigned mode,struct desparams * desp)110 common_crypt(char *key, char *buf, unsigned len, unsigned mode,
111 struct desparams *desp)
112 {
113 int desdev;
114
115 if ((len % 8) != 0 || len > DES_MAXDATA) {
116 return(DESERR_BADPARAM);
117 }
118 desp->des_dir =
119 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
120
121 desdev = mode & DES_DEVMASK;
122 COPY8(key, desp->des_key);
123 /*
124 * software
125 */
126 if (__des_crypt_LOCAL != NULL) {
127 if (!__des_crypt_LOCAL(buf, len, desp)) {
128 return (DESERR_HWERROR);
129 }
130 } else {
131 if (!_des_crypt_call(buf, len, desp)) {
132 return (DESERR_HWERROR);
133 }
134 }
135 return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE);
136 }
137