1 /*- 2 * Copyright (c) 2009, Sun Microsystems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * - Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * - Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * - Neither the name of Sun Microsystems, Inc. nor the names of its 13 * contributors may be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 /* 29 * des_crypt.c, DES encryption library routines 30 * Copyright (C) 1986, Sun Microsystems, Inc. 31 */ 32 33 #include <sys/types.h> 34 #include <rpc/des_crypt.h> 35 #include <rpc/des.h> 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI"; 39 #endif 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 static int common_crypt( char *, char *, unsigned, unsigned, struct desparams * ); 44 int (*__des_crypt_LOCAL)(char *, unsigned, struct desparams *) = 0; 45 extern int _des_crypt_call(char *, int, struct desparams *); 46 /* 47 * Copy 8 bytes 48 */ 49 #define COPY8(src, dst) { \ 50 char *a = (char *) dst; \ 51 char *b = (char *) src; \ 52 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 53 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 54 } 55 56 /* 57 * Copy multiple of 8 bytes 58 */ 59 #define DESCOPY(src, dst, len) { \ 60 char *a = (char *) dst; \ 61 char *b = (char *) src; \ 62 int i; \ 63 for (i = (int) len; i > 0; i -= 8) { \ 64 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 65 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ 66 } \ 67 } 68 69 /* 70 * CBC mode encryption 71 */ 72 int 73 cbc_crypt(char *key, char *buf, unsigned len, unsigned mode, char *ivec) 74 { 75 int err; 76 struct desparams dp; 77 78 #ifdef BROKEN_DES 79 dp.UDES.UDES_buf = buf; 80 dp.des_mode = ECB; 81 #else 82 dp.des_mode = CBC; 83 #endif 84 COPY8(ivec, dp.des_ivec); 85 err = common_crypt(key, buf, len, mode, &dp); 86 COPY8(dp.des_ivec, ivec); 87 return(err); 88 } 89 90 91 /* 92 * ECB mode encryption 93 */ 94 int 95 ecb_crypt(char *key, char *buf, unsigned len, unsigned mode) 96 { 97 struct desparams dp; 98 99 #ifdef BROKEN_DES 100 dp.UDES.UDES_buf = buf; 101 dp.des_mode = CBC; 102 #else 103 dp.des_mode = ECB; 104 #endif 105 return(common_crypt(key, buf, len, mode, &dp)); 106 } 107 108 109 110 /* 111 * Common code to cbc_crypt() & ecb_crypt() 112 */ 113 static int 114 common_crypt(char *key, char *buf, unsigned len, unsigned mode, 115 struct desparams *desp) 116 { 117 int desdev; 118 119 if ((len % 8) != 0 || len > DES_MAXDATA) { 120 return(DESERR_BADPARAM); 121 } 122 desp->des_dir = 123 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; 124 125 desdev = mode & DES_DEVMASK; 126 COPY8(key, desp->des_key); 127 /* 128 * software 129 */ 130 if (__des_crypt_LOCAL != NULL) { 131 if (!__des_crypt_LOCAL(buf, len, desp)) { 132 return (DESERR_HWERROR); 133 } 134 } else { 135 if (!_des_crypt_call(buf, len, desp)) { 136 return (DESERR_HWERROR); 137 } 138 } 139 return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE); 140 } 141