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 #define CRYPT_DEFAULT "sha512" 83 84 static int crypt_type = -1; 85 86 static void 87 crypt_setdefault(void) 88 { 89 size_t i; 90 91 if (crypt_type != -1) 92 return; 93 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 94 if (strcmp(CRYPT_DEFAULT, crypt_types[i].name) == 0) { 95 crypt_type = (int)i; 96 return; 97 } 98 } 99 crypt_type = 0; 100 } 101 102 const char * 103 crypt_get_format(void) 104 { 105 106 crypt_setdefault(); 107 return (crypt_types[crypt_type].name); 108 } 109 110 int 111 crypt_set_format(const char *type) 112 { 113 size_t i; 114 115 crypt_setdefault(); 116 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 117 if (strcmp(type, crypt_types[i].name) == 0) { 118 crypt_type = (int)i; 119 return (1); 120 } 121 } 122 return (0); 123 } 124 125 char * 126 crypt(const char *passwd, const char *salt) 127 { 128 size_t i; 129 130 crypt_setdefault(); 131 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 132 if (crypt_types[i].magic != NULL && strncmp(salt, 133 crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0) 134 return (crypt_types[i].func(passwd, salt)); 135 } 136 return (crypt_types[crypt_type].func(passwd, salt)); 137 } 138