1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * Portions of this source code were derived from Berkeley 4.3 BSD
32 * under license from the Regents of the University of California.
33 */
34
35 #pragma ident "%Z%%M% %I% %E% SMI"
36
37 /*
38 * DES encryption library routines
39 */
40
41 #include <sys/types.h>
42 #include <rpc/des_crypt.h>
43 #include <sys/stat.h>
44 #include <fcntl.h>
45 #include <unistd.h>
46 #include <stropts.h>
47 #ifdef sun
48 #include <sys/ioctl.h>
49 #include <sys/des.h>
50 #ifdef _KERNEL
51 #include <sys/conf.h>
52 #define getdesfd() (cdevsw[11].d_open(0, 0) ? -1 : 0)
53 #define ioctl(a, b, c) (cdevsw[11].d_ioctl(0, b, c, 0) ? -1 : 0)
54 #ifndef CRYPT
55 #define __des_crypt(a, b, c) 0
56 #endif
57 #else
58 #define getdesfd() (open("/dev/des", 0, 0))
59 #endif
60 #else
61 #include <des/des.h>
62 #endif
63
64 #include "des_soft.h"
65
66 /*
67 * To see if chip is installed
68 */
69 #define UNOPENED (-2)
70
71 /*
72 * Copy 8 bytes
73 */
74 #define COPY8(src, dst) { \
75 char *a = (char *)dst; \
76 char *b = (char *)src; \
77 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
78 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
79 }
80
81 /*
82 * Copy multiple of 8 bytes
83 */
84 #define DESCOPY(src, dst, len) { \
85 char *a = (char *)dst; \
86 char *b = (char *)src; \
87 int i; \
88 for (i = (int)len; i > 0; i -= 8) { \
89 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
90 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
91 } \
92 }
93 static int common_crypt(char *, char *, unsigned, unsigned, struct desparams *);
94
95 /*
96 * CBC mode encryption
97 */
98 int
cbc_crypt(char * key,char * buf,size_t len,unsigned int mode,char * ivec)99 cbc_crypt(char *key, char *buf, size_t len, unsigned int mode, char *ivec)
100 {
101 int err = 0;
102
103 /* EXPORT DELETE START */
104 struct desparams dp;
105
106 dp.des_mode = CBC;
107 COPY8(ivec, dp.des_ivec);
108 err = common_crypt(key, buf, len, mode, &dp);
109 COPY8(dp.des_ivec, ivec);
110 /* EXPORT DELETE END */
111 return (err);
112 }
113
114
115 /*
116 * ECB mode encryption
117 */
118 int
ecb_crypt(char * key,char * buf,size_t len,unsigned int mode)119 ecb_crypt(char *key, char *buf, size_t len, unsigned int mode)
120 {
121 int ret = 0;
122
123 /* EXPORT DELETE START */
124 struct desparams dp;
125
126 dp.des_mode = ECB;
127 ret = common_crypt(key, buf, len, mode, &dp);
128 /* EXPORT DELETE END */
129 return (ret);
130 }
131
132
133 /* EXPORT DELETE START */
134 /*
135 * Common code to cbc_crypt() & ecb_crypt()
136 */
137 static int
common_crypt(char * key,char * buf,unsigned len,unsigned mode,struct desparams * desp)138 common_crypt(char *key, char *buf, unsigned len,
139 unsigned mode, struct desparams *desp)
140 {
141 int desdev;
142 int res;
143 int g_desfd = UNOPENED;
144
145 if ((len % 8) != 0 || len > DES_MAXDATA) {
146 return (DESERR_BADPARAM);
147 }
148 desp->des_dir =
149 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
150
151 desdev = mode & DES_DEVMASK;
152 COPY8(key, desp->des_key);
153 #ifdef sun
154 if (desdev == DES_HW) {
155 if (g_desfd < 0) {
156 if (g_desfd == -1 || (g_desfd = getdesfd()) < 0) {
157 goto software; /* no hardware device */
158 }
159 }
160
161 /*
162 * hardware
163 */
164 desp->des_len = len;
165 if (len <= DES_QUICKLEN) {
166 DESCOPY(buf, desp->des_data, len);
167 res = ioctl(g_desfd, (int)DESIOCQUICK, (char *)desp);
168 DESCOPY(desp->des_data, buf, len);
169 } else {
170 desp->des_buf = (uchar_t *)buf;
171 res = ioctl(g_desfd, (int)DESIOCBLOCK, (char *)desp);
172 }
173 return (res == 0 ? DESERR_NONE : DESERR_HWERROR);
174 }
175 software:
176 #endif
177 /*
178 * software
179 */
180 if (!__des_crypt(buf, len, desp)) {
181 return (DESERR_HWERROR);
182 }
183 return (desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE);
184 }
185 /* EXPORT DELETE END */
186