/***************************************************************************** * * $Id: pw_util.c,v 1.11 2004/12/28 15:30:53 mbse Exp $ * Purpose ...............: FreeBSD/NetBSD password utilities. * Remark ................: Taken from FreeBSD and modified for MBSE BBS. * ***************************************************************************** * Copyright (C) 1997-2002 * * Michiel Broek FIDO: 2:280/2802 * Beekmansbos 10 * 1971 BV IJmuiden * the Netherlands * * This file is part of MBSE BBS. * * This BBS is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2, or (at your option) any * later version. * * MBSE BBS is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with MBSE BBS; see the file COPYING. If not, write to the Free * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. *****************************************************************************/ /* * Copyright (c) 1990, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) #include "../config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pw_util.h" char *tempname; static int lockfd; void pw_init() { struct rlimit rlim; /* Unlimited resource limits. */ rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY; (void)setrlimit(RLIMIT_CPU, &rlim); (void)setrlimit(RLIMIT_FSIZE, &rlim); (void)setrlimit(RLIMIT_STACK, &rlim); (void)setrlimit(RLIMIT_DATA, &rlim); (void)setrlimit(RLIMIT_RSS, &rlim); /* Don't drop core (not really necessary, but GP's). */ rlim.rlim_cur = rlim.rlim_max = 0; (void)setrlimit(RLIMIT_CORE, &rlim); /* Turn off signals. */ (void)signal(SIGALRM, SIG_IGN); (void)signal(SIGHUP, SIG_IGN); (void)signal(SIGINT, SIG_IGN); (void)signal(SIGPIPE, SIG_IGN); (void)signal(SIGQUIT, SIG_IGN); (void)signal(SIGTERM, SIG_IGN); /* Create with exact permissions. */ (void)umask(0); } int pw_lock() { /* * If the master password file doesn't exist, the system is hosed. * Might as well try to build one. Set the close-on-exec bit so * that users can't get at the encrypted passwords while editing. * Open should allow flock'ing the file; see 4.4BSD. XXX */ for (;;) { struct stat st; lockfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0); if (lockfd < 0 || fcntl(lockfd, F_SETFD, 1) == -1) { syslog(LOG_ERR, "%s", _PATH_MASTERPASSWD); fprintf(stderr, "%s: %s\n", strerror(errno), _PATH_MASTERPASSWD); exit(1); } if (flock(lockfd, LOCK_EX|LOCK_NB)) { syslog(LOG_ERR, "the password db file is busy"); fprintf(stderr, "the password db file is busy\n"); exit(1); } /* * If the password file was replaced while we were trying to * get the lock, our hardlink count will be 0 and we have to * close and retry. */ if (fstat(lockfd, &st) < 0) { syslog(LOG_ERR, "fstat() failed"); fprintf(stderr, "%s: %s\n", strerror(errno), "fstat() failed"); exit(1); } if (st.st_nlink != 0) break; close(lockfd); lockfd = -1; } return (lockfd); } int pw_tmp() { static char path[MAXPATHLEN] = _PATH_MASTERPASSWD; int fd; char *p; if ((p = strrchr(path, '/'))) ++p; else p = path; strcpy(p, "pw.XXXXXX"); if ((fd = mkstemp(path)) == -1) { syslog(LOG_ERR, "%s", path); fprintf(stderr, "%s: %s\n", strerror(errno), path); exit(1); } tempname = path; return (fd); } int pw_mkdb(char *username) { int pstat; pid_t pid; (void)fflush(stderr); if (!(pid = fork())) { if(!username) { syslog(LOG_WARNING, "rebuilding the database..."); execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", tempname, NULL); } else { syslog(LOG_WARNING, "updating the database for %s...", username); #if defined(__FreeBSD__) || defined(__OpenBSD__) execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", "-u", username, tempname, NULL); #elif defined(__NetBSD__) execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", tempname, NULL); #else #error "Not FreeBSD, OpenBSD or NetBSD - don't know what to do" #endif } pw_error((char *)_PATH_PWD_MKDB, 1, 1); } pid = waitpid(pid, &pstat, 0); if (pid == -1 || !WIFEXITED(pstat) || WEXITSTATUS(pstat) != 0) return (0); syslog(LOG_WARNING, "done"); return (1); } void pw_error(char *name, int errn, int eval) { #ifdef YP extern int _use_yp; #endif /* YP */ if (errn) syslog(LOG_WARNING, name); #ifdef YP if (_use_yp) syslog(LOG_WARNING, "NIS information unchanged"); else #endif /* YP */ syslog(LOG_WARNING, "%s: unchanged", _PATH_MASTERPASSWD); (void)unlink(tempname); exit(eval); } void pw_copy(int ffd, int tfd, struct passwd *pw) { FILE *from, *to; int done; char *p, buf[8192]; char uidstr[20]; char gidstr[20]; char chgstr[20]; char expstr[20]; snprintf(uidstr, sizeof(uidstr), "%d", pw->pw_uid); snprintf(gidstr, sizeof(gidstr), "%d", pw->pw_gid); snprintf(chgstr, sizeof(chgstr), "%ld", (long)pw->pw_change); snprintf(expstr, sizeof(expstr), "%ld", (long)pw->pw_expire); if (!(from = fdopen(ffd, "r"))) pw_error((char *)_PATH_MASTERPASSWD, 1, 1); if (!(to = fdopen(tfd, "w"))) pw_error(tempname, 1, 1); for (done = 0; fgets(buf, sizeof(buf), from);) { if (!strchr(buf, '\n')) { syslog(LOG_WARNING, "%s: line too long", _PATH_MASTERPASSWD); pw_error(NULL, 0, 1); } if (done) { (void)fprintf(to, "%s", buf); if (ferror(to)) goto err; continue; } for (p = buf; *p != '\n'; p++) if (*p != ' ' && *p != '\t') break; if (*p == '#' || *p == '\n') { (void)fprintf(to, "%s", buf); if (ferror(to)) goto err; continue; } if (!(p = strchr(buf, ':'))) { syslog(LOG_WARNING, "%s: corrupted entry", _PATH_MASTERPASSWD); pw_error(NULL, 0, 1); } *p = '\0'; if (strcmp(buf, pw->pw_name)) { *p = ':'; (void)fprintf(to, "%s", buf); if (ferror(to)) goto err; continue; } #if defined(__FreeBSD__) (void)fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n", pw->pw_name, pw->pw_passwd, pw->pw_fields & _PWF_UID ? uidstr : "", pw->pw_fields & _PWF_GID ? gidstr : "", pw->pw_class, pw->pw_fields & _PWF_CHANGE ? chgstr : "", pw->pw_fields & _PWF_EXPIRE ? expstr : "", pw->pw_gecos, pw->pw_dir, pw->pw_shell); #elif defined(__NetBSD__) || defined(__OpenBSD__) (void)fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n", pw->pw_name, pw->pw_passwd, uidstr, gidstr, pw->pw_class, chgstr, expstr, pw->pw_gecos, pw->pw_dir, pw->pw_shell); #else #error "Not FreeBSD, OpenBSD or NetBSD - don't know what to do" #endif done = 1; if (ferror(to)) goto err; } if (!done) { #ifdef YP /* Ultra paranoid: shouldn't happen. */ if (getuid()) { syslog(LOG_WARNING, "%s: not found in %s -- permission denied", pw->pw_name, _PATH_MASTERPASSWD); pw_error(NULL, 0, 1); } else #endif /* YP */ #if defined(__FreeBSD__) (void)fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n", pw->pw_name, pw->pw_passwd, pw->pw_fields & _PWF_UID ? uidstr : "", pw->pw_fields & _PWF_GID ? gidstr : "", pw->pw_class, pw->pw_fields & _PWF_CHANGE ? chgstr : "", pw->pw_fields & _PWF_EXPIRE ? expstr : "", pw->pw_gecos, pw->pw_dir, pw->pw_shell); #elif defined(__NetBSD__) || defined(__OpenBSD__) (void)fprintf(to, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n", pw->pw_name, pw->pw_passwd, uidstr, gidstr, pw->pw_class, chgstr, expstr, pw->pw_gecos, pw->pw_dir, pw->pw_shell); #else #error "Not FreeBSD, OpenBSD or NetBSD - don't know what to do" #endif } if (ferror(to)) err: pw_error(NULL, 1, 1); (void)fclose(to); } #endif