1 /* $NetBSD: pam_passwd.c,v 1.3 2005/02/26 07:19:25 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 Networks Associates Technologies, Inc. 5 * All rights reserved. 6 * 7 * This software was developed for the FreeBSD Project by ThinkSec AS and 8 * NAI Labs, the Security Research Division of Network Associates, Inc. 9 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 10 * DARPA CHATS research program. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. The name of the author may not be used to endorse or promote 21 * products derived from this software without specific prior written 22 * permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 #ifdef __FreeBSD__ 39 __FBSDID("$FreeBSD: src/usr.bin/passwd/passwd.c,v 1.23 2003/04/18 21:27:09 nectar Exp $"); 40 #else 41 __RCSID("$NetBSD: pam_passwd.c,v 1.3 2005/02/26 07:19:25 thorpej Exp $"); 42 #endif 43 44 #include <sys/param.h> 45 46 #include <err.h> 47 #include <pwd.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <syslog.h> 51 #include <unistd.h> 52 53 #include "extern.h" 54 55 #include <security/pam_appl.h> 56 #include <security/openpam.h> 57 58 static pam_handle_t *pamh; 59 static struct pam_conv pamc = { 60 openpam_ttyconv, 61 NULL 62 }; 63 64 #define pam_check(msg) \ 65 do { \ 66 if (pam_err != PAM_SUCCESS) { \ 67 warnx("%s: %s", (msg), pam_strerror(pamh, pam_err)); \ 68 goto end; \ 69 } \ 70 } while (/*CONSTCOND*/0) 71 72 void 73 pwpam_process(const char *username, int argc, char **argv) 74 { 75 int ch, pam_err; 76 char hostname[MAXHOSTNAMELEN + 1]; 77 78 while ((ch = getopt(argc, argv, "")) != -1) { 79 switch (ch) { 80 default: 81 usage(); 82 /* NOTREACHED */ 83 } 84 } 85 86 argc -= optind; 87 argv += optind; 88 89 switch (argc) { 90 case 0: 91 /* username already provided */ 92 break; 93 case 1: 94 username = argv[0]; 95 break; 96 default: 97 usage(); 98 /* NOTREACHED */ 99 } 100 101 /* initialize PAM -- always use the program name "passwd" */ 102 pam_err = pam_start("passwd", username, &pamc, &pamh); 103 pam_check("unable to start PAM session"); 104 105 pam_err = pam_set_item(pamh, PAM_TTY, ttyname(STDERR_FILENO)); 106 pam_check("unable to set TTY"); 107 108 (void)gethostname(hostname, sizeof hostname); 109 pam_err = pam_set_item(pamh, PAM_RHOST, hostname); 110 pam_check("unable to set RHOST"); 111 112 pam_err = pam_set_item(pamh, PAM_RUSER, getlogin()); 113 pam_check("unable to set RUSER"); 114 115 /* set new password */ 116 pam_err = pam_chauthtok(pamh, 0); 117 if (pam_err != PAM_SUCCESS) 118 printf("Unable to change auth token: %s\n", 119 pam_strerror(pamh, pam_err)); 120 121 end: 122 pam_end(pamh, pam_err); 123 if (pam_err == PAM_SUCCESS) 124 return; 125 exit(1); 126 } 127