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 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 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 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