1 /* $OpenBSD: check_expire.c,v 1.1 2000/11/26 01:27:19 millert Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Berkeley Software Design, 17 * Inc. 18 * 4. The name of Berkeley Software Design, Inc. may not be used to endorse 19 * or promote products derived from this software without specific prior 20 * written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN, INC. BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * BSDI $From: check_expire.c,v 2.1 1997/08/08 18:38:25 prb Exp $ 35 */ 36 37 #include <sys/types.h> 38 39 #include <errno.h> 40 #include <fcntl.h> 41 #include <pwd.h> 42 #include <signal.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <syslog.h> 47 #include <time.h> 48 #include <tzfile.h> 49 #include <util.h> 50 51 #include <login_cap.h> 52 #include <bsd_auth.h> 53 54 static char *pwd_update __P((struct passwd *)); 55 56 int 57 login_check_expire(back, pwd, class, lastchance) 58 FILE *back; 59 struct passwd *pwd; 60 char *class; 61 int lastchance; 62 { 63 auth_session_t *as; 64 login_cap_t *lc; 65 quad_t dead, expire, warn; 66 char *p; 67 68 if ((as = auth_open()) == NULL) { 69 syslog(LOG_ERR, "failed to create auth session"); 70 return (1); 71 } 72 if (auth_setpwd(as, pwd) < 0) { 73 syslog(LOG_ERR, "failed to set pwd entry in auth session"); 74 return (1); 75 } 76 77 expire = auth_check_change(as); 78 auth_close(as); 79 80 if (expire != 0) { 81 fprintf(back, BI_VALUE " expire %qd\n", expire); 82 83 if (class == NULL) 84 class = pwd->pw_class; 85 86 if ((lc = login_getclass(class)) == NULL) { 87 dead = 0; 88 warn = 0; 89 } else { 90 dead = login_getcaptime(lc, "password-dead", 0, 0); 91 warn = login_getcaptime(lc, "password-warn", 92 2 * DAYSPERWEEK * SECSPERDAY, 93 2 * DAYSPERWEEK * SECSPERDAY); 94 if (dead < 0) { 95 syslog(LOG_ERR, "class %s password-dead is %qd", 96 lc->lc_class, dead); 97 dead = 0; 98 } 99 if (warn < 0) { 100 syslog(LOG_ERR, "class %s password-warn is %qd", 101 lc->lc_class, warn); 102 warn = 0; 103 } 104 } 105 106 /* 107 * If their password is dead (expired longer than 108 * password-dead) then just reject them. If it is 109 * expired but not dead yet, reject them with a 110 * PWEXPIRED so login knows they can still sort of 111 * get in. 112 */ 113 if (expire < -dead) { 114 syslog(LOG_WARNING, "%s: dead password", pwd->pw_name); 115 fprintf(back, BI_VALUE 116 " errormsg Your password has expired\n"); 117 fprintf(back, BI_REJECT "\n"); 118 return (1); 119 } 120 if (expire < 0) { 121 if (lastchance) { 122 endpwent(); 123 124 /* 125 * Only let them play this game once. 126 * Set their password change time to 1. 127 * This will most certainly cause any 128 * expired password to be dead, as well. 129 */ 130 pwd = pw_dup(pwd); 131 pwd->pw_change = 1; 132 p = pwd_update(pwd); 133 memset(pwd->pw_passwd, 0, 134 strlen(pwd->pw_passwd)); 135 free(pwd); 136 if (p != NULL) { 137 fprintf(back, BI_VALUE " errormsg %s", 138 auth_mkvalue(p)); 139 fprintf(back, BI_REJECT "\n"); 140 return (1); 141 } 142 } 143 syslog(LOG_WARNING, "%s: expired password", pwd->pw_name); 144 fprintf(back, BI_VALUE 145 " errormsg Your password has expired\n"); 146 fprintf(back, BI_PWEXPIRED "\n"); 147 return (1); 148 } 149 150 /* 151 * If their password is not expired but is about to expire 152 * then warn them. 153 */ 154 if (expire <= warn) { 155 fprintf(back, BI_VALUE 156 " warnmsg Your password expires on %s\n", 157 ctime(&pwd->pw_change)); 158 } 159 } 160 return (0); 161 } 162 163 static char * 164 pwd_update(pwd) 165 struct passwd *pwd; 166 { 167 int tfd, pfd; 168 169 pw_init(); 170 tfd = pw_lock(0); 171 if (tfd < 0) { 172 if (errno == EEXIST) 173 return("the passwd file is busy."); 174 else 175 return("can't open passwd temp file"); 176 } 177 178 pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0); 179 if (pfd < 0 || fcntl(pfd, F_SETFD, 1) == -1) { 180 pw_abort(); 181 return(strerror(errno)); 182 } 183 184 pw_copy(pfd, tfd, pwd); 185 if (pw_mkdb(pwd->pw_name) < 0) { 186 pw_abort(); 187 return("unable to update password database"); 188 } 189 190 return(NULL); 191 } 192