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 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 static int common_crypt( char *, char *, unsigned, unsigned, struct desparams * ); 46 int (*__des_crypt_LOCAL)(char *, unsigned, struct desparams *) = 0; 47 extern int _des_crypt_call(char *, int, struct desparams *); 48 /* 49 * Copy 8 bytes 50 */ 51 #define COPY8(src, dst) { \ 52 char *a = (char *) dst; \ 53 char *b = (char *) src; \ 54 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 55 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 56 } 57 58 /* 59 * Copy multiple of 8 bytes 60 */ 61 #define DESCOPY(src, dst, len) { \ 62 char *a = (char *) dst; \ 63 char *b = (char *) src; \ 64 int i; \ 65 for (i = (int) len; i > 0; i -= 8) { \ 66 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 67 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 68 } \ 69 } 70 71 /* 72 * CBC mode encryption 73 */ 74 int 75 cbc_crypt(char *key, char *buf, unsigned len, unsigned mode, char *ivec) 76 { 77 int err; 78 struct desparams dp; 79 80 #ifdef BROKEN_DES 81 dp.UDES.UDES_buf = buf; 82 dp.des_mode = ECB; 83 #else 84 dp.des_mode = CBC; 85 #endif 86 COPY8(ivec, dp.des_ivec); 87 err = common_crypt(key, buf, len, mode, &dp); 88 COPY8(dp.des_ivec, ivec); 89 return(err); 90 } 91 92 93 /* 94 * ECB mode encryption 95 */ 96 int 97 ecb_crypt(char *key, char *buf, unsigned len, unsigned mode) 98 { 99 struct desparams dp; 100 101 #ifdef BROKEN_DES 102 dp.UDES.UDES_buf = buf; 103 dp.des_mode = CBC; 104 #else 105 dp.des_mode = ECB; 106 #endif 107 return(common_crypt(key, buf, len, mode, &dp)); 108 } 109 110 111 112 /* 113 * Common code to cbc_crypt() & ecb_crypt() 114 */ 115 static int 116 common_crypt(char *key, char *buf, unsigned len, unsigned mode, 117 struct desparams *desp) 118 { 119 int desdev; 120 121 if ((len % 8) != 0 || len > DES_MAXDATA) { 122 return(DESERR_BADPARAM); 123 } 124 desp->des_dir = 125 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; 126 127 desdev = mode & DES_DEVMASK; 128 COPY8(key, desp->des_key); 129 /* 130 * software 131 */ 132 if (__des_crypt_LOCAL != NULL) { 133 if (!__des_crypt_LOCAL(buf, len, desp)) { 134 return (DESERR_HWERROR); 135 } 136 } else { 137 if (!_des_crypt_call(buf, len, desp)) { 138 return (DESERR_HWERROR); 139 } 140 } 141 return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE); 142 } 143