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 { 58 NULL, 59 NULL 60 } 61 }; 62 63 static int crypt_type = -1; 64 65 static void 66 crypt_setdefault(void) 67 { 68 char *def; 69 int i; 70 71 if (crypt_type != -1) 72 return; 73 def = auth_getval("crypt_default"); 74 if (def == NULL) { 75 crypt_type = 0; 76 return; 77 } 78 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 79 if (strcmp(def, crypt_types[i].name) == 0) { 80 crypt_type = i; 81 return; 82 } 83 } 84 crypt_type = 0; 85 } 86 87 const char * 88 crypt_get_format(void) 89 { 90 91 crypt_setdefault(); 92 return (crypt_types[crypt_type].name); 93 } 94 95 int 96 crypt_set_format(char *type) 97 { 98 int i; 99 100 crypt_setdefault(); 101 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 102 if (strcmp(type, crypt_types[i].name) == 0) { 103 crypt_type = i; 104 return (1); 105 } 106 } 107 return (0); 108 } 109 110 char * 111 crypt(char *passwd, char *salt) 112 { 113 int i; 114 115 crypt_setdefault(); 116 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 117 if (crypt_types[i].magic != NULL && strncmp(salt, 118 crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0) 119 return (crypt_types[i].func(passwd, salt)); 120 } 121 return (crypt_types[crypt_type].func(passwd, salt)); 122 } 123