system_cmds/chkpasswd.tproj/passwd.c

   1 /*
   2  * Copyright (c) 1999-2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 #define INFO_FILE 1
  25 #define INFO_NIS 2
  26 #define INFO_OPEN_DIRECTORY 3
  27 #define INFO_PAM 4
  28
  29 #ifndef __SLICK__
  30 #define _PASSWD_FILE "/etc/master.passwd"
  31 #else
  32 #define _PASSWD_FILE "/etc/passwd"
  33 #endif
  34
  35 #include <stdio.h>
  36 #include <errno.h>
  37 #include <pwd.h>
  38 #include <libc.h>
  39 #include <ctype.h>
  40 #include <string.h>
  41 #include <pwd.h>
  42 #include "stringops.h"
  43
  44 #ifdef __SLICK__
  45 #define _PASSWORD_LEN 8
  46 #endif
  47
  48 #include "passwd.h"
  49
  50 const char* progname = "chkpasswd";
  51
  52 static int literal = 0;
  53
  54 void
  55 checkpasswd(char *name, char *old_pw)
  56 {
  57         int isNull;
  58         char *p;
  59
  60         printf("Checking password for %s.\n", name);
  61
  62         p = "";
  63         isNull = 0;
  64         if (old_pw == NULL) isNull = 1;
  65         if ((isNull == 0) && (old_pw[0] == '\0')) isNull = 1;
  66         if (isNull == 0)
  67         {
  68                 p = getpass("Password:");
  69                 sleep(1); // make sure this doesn't go too quickly
  70                 if (strcmp(literal ? p : crypt(p, old_pw), old_pw))
  71                 {
  72                         errno = EACCES;
  73                         fprintf(stderr, "Sorry\n");
  74                         exit(1);
  75                 }
  76         }
  77         return;
  78 }
  79
  80 static void
  81 usage(void)
  82 {
  83         fprintf(stderr, "usage: chkpasswd [-i infosystem] [-l location] [-c] [name]\n");
  84         fprintf(stderr, "  infosystem:\n");
  85         fprintf(stderr, "    file\n");
  86         fprintf(stderr, "    NIS\n");
  87         fprintf(stderr, "    OpenDirectory\n");
  88         fprintf(stderr, "  location (for infosystem):\n");
  89         fprintf(stderr, "    file           location is path to file (default is %s)\n", _PASSWD_FILE);
  90         fprintf(stderr, "    NIS            location is NIS domain name\n");
  91         fprintf(stderr, "    OpenDirectory  location is directory node name\n");
  92         fprintf(stderr, "  -c: supplied password is compared verbatim without first\n");
  93         fprintf(stderr, "      being crypted\n");
  94         exit(1);
  95 }
  96
  97 int
  98 main(int argc, char *argv[])
  99 {
 100         char* user = NULL;
 101         char* locn = NULL;
 102         int infosystem, ch;
 103
 104         infosystem = INFO_PAM;
 105
 106         while ((ch = getopt(argc, argv, "ci:l:")) != -1) {
 107                 switch(ch) {
 108                 case 'i':
 109                         if (!strcasecmp(optarg, "file")) {
 110                                 infosystem = INFO_FILE;
 111                         } else if (!strcasecmp(optarg, "NIS")) {
 112                                 infosystem = INFO_NIS;
 113                         } else if (!strcasecmp(optarg, "YP")) {
 114                                 infosystem = INFO_NIS;
 115                         } else if (!strcasecmp(optarg, "opendirectory")) {
 116                                 infosystem = INFO_OPEN_DIRECTORY;
 117                         } else if (!strcasecmp(optarg, "PAM")) {
 118                                 infosystem = INFO_PAM;
 119                         } else {
 120                                 fprintf(stderr, "%s: Unknown info system \'%s\'.\n",
 121                                         progname, optarg);
 122                                 usage();
 123                         }
 124                         break;
 125                 case 'l':
 126                         locn = optarg;
 127                         break;
 128                 case 'c':
 129                         literal++;
 130                         break;
 131                 case '?':
 132                 default:
 133                         usage();
 134                         break;
 135                 }
 136         }
 137         argc -= optind;
 138         argv += optind;
 139
 140         if (argc > 1) {
 141                 usage();
 142         } else if (argc == 1) {
 143                 user = argv[0];
 144         }
 145
 146         if (user == NULL) {
 147                 struct passwd* pw = getpwuid(getuid());
 148                 if (pw != NULL && pw->pw_name != NULL) {
 149                         user = strdup(pw->pw_name);
 150                 }
 151                 if (user == NULL) {
 152                         fprintf(stderr, "you don't have a login name\n");
 153                         exit(1);
 154                 }
 155         }
 156
 157         switch (infosystem)
 158         {
 159                 case INFO_FILE:
 160                         file_check_passwd(user, locn);
 161                         break;
 162                 case INFO_NIS:
 163                         nis_check_passwd(user, locn);
 164                         break;
 165                 case INFO_OPEN_DIRECTORY:
 166                         od_check_passwd(user, locn);
 167                         break;
 168                 case INFO_PAM:
 169                         pam_check_passwd(user);
 170                         break;
 171         }
 172
 173         exit(0);
 174 }