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 "sha256", 67 crypt_sha256, 68 "$5$" 69 }, 70 { 71 "sha512", 72 crypt_sha512, 73 "$6$" 74 }, 75 { 76 NULL, 77 NULL, 78 NULL 79 } 80 }; 81 82 #ifdef HAS_DES 83 #define CRYPT_DEFAULT "des" 84 #else 85 #define CRYPT_DEFAULT "md5" 86 #endif 87 88 static int crypt_type = -1; 89 90 static void 91 crypt_setdefault(void) 92 { 93 size_t i; 94 95 if (crypt_type != -1) 96 return; 97 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 98 if (strcmp(CRYPT_DEFAULT, crypt_types[i].name) == 0) { 99 crypt_type = (int)i; 100 return; 101 } 102 } 103 crypt_type = 0; 104 } 105 106 const char * 107 crypt_get_format(void) 108 { 109 110 crypt_setdefault(); 111 return (crypt_types[crypt_type].name); 112 } 113 114 int 115 crypt_set_format(const char *type) 116 { 117 size_t i; 118 119 crypt_setdefault(); 120 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 121 if (strcmp(type, crypt_types[i].name) == 0) { 122 crypt_type = (int)i; 123 return (1); 124 } 125 } 126 return (0); 127 } 128 129 char * 130 crypt(const char *passwd, const char *salt) 131 { 132 size_t i; 133 134 crypt_setdefault(); 135 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 136 if (crypt_types[i].magic != NULL && strncmp(salt, 137 crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0) 138 return (crypt_types[i].func(passwd, salt)); 139 } 140 return (crypt_types[crypt_type].func(passwd, salt)); 141 } 142