crypt.c revision 91754
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: head/lib/libcrypt/crypt.c 91754 2002-03-06 17:18:09Z markm $"); 29 30#include <sys/types.h> 31#include <string.h> 32#include <libutil.h> 33#include <unistd.h> 34#include "crypt.h" 35 36static 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 NULL, 62 NULL, 63 NULL 64 } 65}; 66 67static int crypt_type = -1; 68 69static void 70crypt_setdefault(void) 71{ 72 char *def; 73 size_t i; 74 75 if (crypt_type != -1) 76 return; 77 def = auth_getval("crypt_default"); 78 if (def == NULL) { 79 crypt_type = 0; 80 return; 81 } 82 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 83 if (strcmp(def, crypt_types[i].name) == 0) { 84 crypt_type = (int)i; 85 return; 86 } 87 } 88 crypt_type = 0; 89} 90 91const char * 92crypt_get_format(void) 93{ 94 95 crypt_setdefault(); 96 return (crypt_types[crypt_type].name); 97} 98 99int 100crypt_set_format(const char *type) 101{ 102 size_t i; 103 104 crypt_setdefault(); 105 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) { 106 if (strcmp(type, crypt_types[i].name) == 0) { 107 crypt_type = (int)i; 108 return (1); 109 } 110 } 111 return (0); 112} 113 114char * 115crypt(const char *passwd, const char *salt) 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 (crypt_types[i].magic != NULL && strncmp(salt, 122 crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0) 123 return (crypt_types[i].func(passwd, salt)); 124 } 125 return (crypt_types[crypt_type].func(passwd, salt)); 126} 127