1 /* 2 * Copyright (c) 1999 3 * Mark Murray. 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 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY MARK MURRAY AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL MARK MURRAY OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 * 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static const char rcsid[] = 32 "$FreeBSD$"; 33 #endif /* LIBC_SCCS and not lint */ 34 35 #include <sys/types.h> 36 #include <string.h> 37 #include <libutil.h> 38 #include "crypt.h" 39 40 static const struct { 41 const char *const name; 42 char *(*const func)(const char *, const char *); 43 const char *const magic; 44 } crypt_types[] = { 45 #ifdef HAS_DES 46 { 47 "des", 48 crypt_des, 49 NULL 50 }, 51 #endif 52 { 53 "md5", 54 crypt_md5, 55 "$1$" 56 }, 57 #ifdef HAS_BLOWFISH 58 { 59 "blf", 60 crypt_blowfish, 61 "$2" 62 }, 63 #endif 64 { 65 NULL, 66 NULL 67 } 68 }; 69 70 static int crypt_type = -1; 71 72 static void 73 crypt_setdefault(void) 74 { 75 char *def; 76 int i; 77 78 if (crypt_type != -1) 79 return; 80 def = auth_getval("crypt_default"); 81 if (def == NULL) { 82 crypt_type = 0; 83 return; 84 } 85 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 86 if (strcmp(def, crypt_types[i].name) == 0) { 87 crypt_type = i; 88 return; 89 } 90 } 91 crypt_type = 0; 92 } 93 94 const char * 95 crypt_get_format(void) 96 { 97 98 crypt_setdefault(); 99 return (crypt_types[crypt_type].name); 100 } 101 102 int 103 crypt_set_format(char *type) 104 { 105 int i; 106 107 crypt_setdefault(); 108 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 109 if (strcmp(type, crypt_types[i].name) == 0) { 110 crypt_type = i; 111 return (1); 112 } 113 } 114 return (0); 115 } 116 117 char * 118 crypt(char *passwd, char *salt) 119 { 120 int i; 121 122 crypt_setdefault(); 123 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 124 if (crypt_types[i].magic != NULL && strncmp(salt, 125 crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0) 126 return (crypt_types[i].func(passwd, salt)); 127 } 128 return (crypt_types[crypt_type].func(passwd, salt)); 129 } 130