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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <string.h> 32 #include <libutil.h> 33 #include <unistd.h> 34 #include "crypt.h" 35 36 static const struct { 37 const char *const name; 38 char *(*const func)(const char *, const char *); 39 const char *const magic; 40 } crypt_types[] = { 41 #ifdef HAS_DES 42 { 43 "des", 44 crypt_des, 45 NULL 46 }, 47 #endif 48 { 49 "md5", 50 crypt_md5, 51 "$1$" 52 }, 53 #ifdef HAS_BLOWFISH 54 { 55 "blf", 56 crypt_blowfish, 57 "$2" 58 }, 59 #endif 60 { 61 "nth", 62 crypt_nthash, 63 "$3$" 64 }, 65 { 66 NULL, 67 NULL, 68 NULL 69 } 70 }; 71 72 static int crypt_type = -1; 73 74 static void 75 crypt_setdefault(void) 76 { 77 char *def; 78 size_t i; 79 80 if (crypt_type != -1) 81 return; 82 def = auth_getval("crypt_default"); 83 if (def == NULL) { 84 crypt_type = 0; 85 return; 86 } 87 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 88 if (strcmp(def, crypt_types[i].name) == 0) { 89 crypt_type = (int)i; 90 return; 91 } 92 } 93 crypt_type = 0; 94 } 95 96 const char * 97 crypt_get_format(void) 98 { 99 100 crypt_setdefault(); 101 return (crypt_types[crypt_type].name); 102 } 103 104 int 105 crypt_set_format(const char *type) 106 { 107 size_t i; 108 109 crypt_setdefault(); 110 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 111 if (strcmp(type, crypt_types[i].name) == 0) { 112 crypt_type = (int)i; 113 return (1); 114 } 115 } 116 return (0); 117 } 118 119 char * 120 crypt(const char *passwd, const char *salt) 121 { 122 size_t i; 123 124 crypt_setdefault(); 125 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 126 if (crypt_types[i].magic != NULL && strncmp(salt, 127 crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0) 128 return (crypt_types[i].func(passwd, salt)); 129 } 130 return (crypt_types[crypt_type].func(passwd, salt)); 131 } 132