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 /* 36 * DES encryption library routines 37 */ 38 39 #include <sys/types.h> 40 #include <rpc/des_crypt.h> 41 #include <sys/stat.h> 42 #include <fcntl.h> 43 #include <unistd.h> 44 #include <stropts.h> 45 #ifdef sun 46 #include <sys/ioctl.h> 47 #include <sys/des.h> 48 #ifdef _KERNEL 49 #include <sys/conf.h> 50 #define getdesfd() (cdevsw[11].d_open(0, 0) ? -1 : 0) 51 #define ioctl(a, b, c) (cdevsw[11].d_ioctl(0, b, c, 0) ? -1 : 0) 52 #ifndef CRYPT 53 #define __des_crypt(a, b, c) 0 54 #endif 55 #else 56 #define getdesfd() (open("/dev/des", 0, 0)) 57 #endif 58 #else 59 #include <des/des.h> 60 #endif 61 62 #include "des_soft.h" 63 64 /* 65 * To see if chip is installed 66 */ 67 #define UNOPENED (-2) 68 69 /* 70 * Copy 8 bytes 71 */ 72 #define COPY8(src, dst) { \ 73 char *a = (char *)dst; \ 74 char *b = (char *)src; \ 75 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 76 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 77 } 78 79 /* 80 * Copy multiple of 8 bytes 81 */ 82 #define DESCOPY(src, dst, len) { \ 83 char *a = (char *)dst; \ 84 char *b = (char *)src; \ 85 int i; \ 86 for (i = (int)len; i > 0; i -= 8) { \ 87 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 88 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 89 } \ 90 } 91 static int common_crypt(char *, char *, unsigned, unsigned, struct desparams *); 92 93 /* 94 * CBC mode encryption 95 */ 96 int 97 cbc_crypt(char *key, char *buf, size_t len, unsigned int mode, char *ivec) 98 { 99 int err = 0; 100 struct desparams dp; 101 102 dp.des_mode = CBC; 103 COPY8(ivec, dp.des_ivec); 104 err = common_crypt(key, buf, len, mode, &dp); 105 COPY8(dp.des_ivec, ivec); 106 return (err); 107 } 108 109 110 /* 111 * ECB mode encryption 112 */ 113 int 114 ecb_crypt(char *key, char *buf, size_t len, unsigned int mode) 115 { 116 int ret = 0; 117 struct desparams dp; 118 119 dp.des_mode = ECB; 120 ret = common_crypt(key, buf, len, mode, &dp); 121 return (ret); 122 } 123 124 125 /* 126 * Common code to cbc_crypt() & ecb_crypt() 127 */ 128 static int 129 common_crypt(char *key, char *buf, unsigned len, 130 unsigned mode, struct desparams *desp) 131 { 132 int desdev; 133 int res; 134 int g_desfd = UNOPENED; 135 136 if ((len % 8) != 0 || len > DES_MAXDATA) { 137 return (DESERR_BADPARAM); 138 } 139 desp->des_dir = 140 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; 141 142 desdev = mode & DES_DEVMASK; 143 COPY8(key, desp->des_key); 144 #ifdef sun 145 if (desdev == DES_HW) { 146 if (g_desfd < 0) { 147 if (g_desfd == -1 || (g_desfd = getdesfd()) < 0) { 148 goto software; /* no hardware device */ 149 } 150 } 151 152 /* 153 * hardware 154 */ 155 desp->des_len = len; 156 if (len <= DES_QUICKLEN) { 157 DESCOPY(buf, desp->des_data, len); 158 res = ioctl(g_desfd, (int)DESIOCQUICK, (char *)desp); 159 DESCOPY(desp->des_data, buf, len); 160 } else { 161 desp->des_buf = (uchar_t *)buf; 162 res = ioctl(g_desfd, (int)DESIOCBLOCK, (char *)desp); 163 } 164 return (res == 0 ? DESERR_NONE : DESERR_HWERROR); 165 } 166 software: 167 #endif 168 /* 169 * software 170 */ 171 if (!__des_crypt(buf, len, desp)) { 172 return (DESERR_HWERROR); 173 } 174 return (desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE); 175 } 176