/* * Copyright (c) 1991, 1993, 1994 * The Regents of the University of California. All rights reserved. * Portions Copyright(C) 1994, Jason Downs. 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. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 2000\n\ The NetBSD Foundation, Inc. All rights reserved.\n\ Copyright (c) 1991, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"); __SCCSID("from: @(#)pwd_mkdb.c 8.5 (Berkeley) 4/20/94"); __RCSID("$NetBSD: pwd_mkdb.c,v 1.17 2000/01/23 19:59:33 mycroft Exp $"); #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define INSECURE 1 #define SECURE 2 #define PERM_INSECURE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) #define PERM_SECURE (S_IRUSR|S_IWUSR) /* pull this out of the C library. */ extern const char __yp_token[]; HASHINFO openinfo = { 4096, /* bsize */ 32, /* ffactor */ 256, /* nelem */ 2048 * 1024, /* cachesize */ NULL, /* hash() */ 0 /* lorder */ }; static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean; static struct passwd pwd; /* password structure */ static char *pname; /* password file name */ static char prefix[MAXPATHLEN]; static char oldpwdfile[MAX(MAXPATHLEN, LINE_MAX * 2)]; static char pwd_db_tmp[MAX(MAXPATHLEN, LINE_MAX * 2)]; static char pwd_Sdb_tmp[MAX(MAXPATHLEN, LINE_MAX * 2)]; void cleanup __P((void)); void error __P((char *)); void wr_error __P((char *)); int main __P((int, char **)); void mv __P((char *, char *)); void rm __P((char *)); int scan __P((FILE *, struct passwd *, u_int32_t *)); void usage __P((void)); int main(argc, argv) int argc; char *argv[]; { DB *dp, *edp; DBT data, key; FILE *fp, *oldfp; sigset_t set; int ch, len, makeold, tfd; u_int32_t x, cnt, flags; char *p; const char *t; char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024]; int hasyp = 0; DBT ypdata, ypkey; int lorder = BYTE_ORDER; oldfp = NULL; strcpy(prefix, "/"); makeold = 0; while ((ch = getopt(argc, argv, "d:pvBL")) != -1) switch(ch) { case 'd': strncpy(prefix, optarg, sizeof(prefix)); prefix[sizeof(prefix)-1] = '\0'; break; case 'p': /* create V7 "file.orig" */ makeold = 1; break; case 'v': /* backward compatible */ break; case 'B': lorder = BIG_ENDIAN; break; case 'L': lorder = LITTLE_ENDIAN; break; case '?': default: usage(); } argc -= optind; argv += optind; if (argc != 1) usage(); /* * This could be changed to allow the user to interrupt. * Probably not worth the effort. */ sigemptyset(&set); sigaddset(&set, SIGTSTP); sigaddset(&set, SIGHUP); sigaddset(&set, SIGINT); sigaddset(&set, SIGQUIT); sigaddset(&set, SIGTERM); (void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL); /* We don't care what the user wants. */ (void)umask(0); pname = *argv; /* Open the original password file */ if (!(fp = fopen(pname, "r"))) error(pname); openinfo.lorder = lorder; /* Open the temporary insecure password database. */ (void)snprintf(pwd_db_tmp, sizeof(pwd_db_tmp), "%s%s.tmp", prefix, _PATH_MP_DB); dp = dbopen(pwd_db_tmp, O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo); if (dp == NULL) error(pwd_db_tmp); clean = FILE_INSECURE; /* * Open file for old password file. Minor trickiness -- don't want to * chance the file already existing, since someone (stupidly) might * still be using this for permission checking. So, open it first and * fdopen the resulting fd. The resulting file should be readable by * everyone. */ if (makeold) { (void)snprintf(oldpwdfile, sizeof(oldpwdfile), "%s.orig", pname); if ((tfd = open(oldpwdfile, O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0) error(oldpwdfile); if ((oldfp = fdopen(tfd, "w")) == NULL) error(oldpwdfile); clean = FILE_ORIG; } /* * The databases actually contain three copies of the original data. * Each password file entry is converted into a rough approximation * of a ``struct passwd'', with the strings placed inline. This * object is then stored as the data for three separate keys. The * first key * is the pw_name field prepended by the _PW_KEYBYNAME * character. The second key is the pw_uid field prepended by the * _PW_KEYBYUID character. The third key is the line number in the * original file prepended by the _PW_KEYBYNUM character. (The special * characters are prepended to ensure that the keys do not collide.) * * If we see something go by that looks like YP, we save a special * pointer record, which if YP is enabled in the C lib, will speed * things up. */ data.data = (u_char *)buf; key.data = (u_char *)tbuf; for (cnt = 1; scan(fp, &pwd, &flags); ++cnt) { #define COMPACT(e) t = e; while ((*p++ = *t++)); /* look like YP? */ if((pwd.pw_name[0] == '+') || (pwd.pw_name[0] == '-')) hasyp++; /* * Warn about potentially unsafe uid/gid overrides. */ if (pwd.pw_name[0] == '+') { if ((flags & _PASSWORD_NOUID) == 0 && pwd.pw_uid == 0) warnx( "line %d: superuser override in YP inclusion", cnt); if ((flags & _PASSWORD_NOGID) == 0 && pwd.pw_gid == 0) warnx("line %d: wheel override in YP inclusion", cnt); } if (lorder != BYTE_ORDER) { M_32_SWAP(pwd.pw_uid); M_32_SWAP(pwd.pw_gid); M_32_SWAP(pwd.pw_change); M_32_SWAP(pwd.pw_expire); M_32_SWAP(flags); } /* Create insecure data. */ p = buf; COMPACT(pwd.pw_name); COMPACT("*"); memmove(p, &pwd.pw_uid, sizeof(pwd.pw_uid)); p += sizeof(pwd.pw_uid); memmove(p, &pwd.pw_gid, sizeof(pwd.pw_gid)); p += sizeof(pwd.pw_gid); memmove(p, &pwd.pw_change, sizeof(pwd.pw_change)); p += sizeof(pwd.pw_change); COMPACT(pwd.pw_class); COMPACT(pwd.pw_gecos); COMPACT(pwd.pw_dir); COMPACT(pwd.pw_shell); memmove(p, &pwd.pw_expire, sizeof(pwd.pw_expire)); p += sizeof(pwd.pw_expire); memmove(p, &flags, sizeof(flags)); p += sizeof(flags); data.size = p - buf; /* Store insecure by name. */ tbuf[0] = _PW_KEYBYNAME; len = strlen(pwd.pw_name); memmove(tbuf + 1, pwd.pw_name, len); key.size = len + 1; if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) wr_error(pwd_db_tmp); /* Store insecure by number. */ tbuf[0] = _PW_KEYBYNUM; x = cnt; if (lorder != BYTE_ORDER) M_32_SWAP(x); memmove(tbuf + 1, &x, sizeof(x)); key.size = sizeof(x) + 1; if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) wr_error(pwd_db_tmp); /* Store insecure by uid. */ tbuf[0] = _PW_KEYBYUID; memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid)); key.size = sizeof(pwd.pw_uid) + 1; if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1) wr_error(pwd_db_tmp); /* Create original format password file entry */ if (makeold) { (void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n", pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos, pwd.pw_dir, pwd.pw_shell); if (ferror(oldfp)) { wr_error(oldpwdfile); } } } /* Store YP token, if needed. */ if(hasyp) { ypkey.data = (u_char *)__yp_token; ypkey.size = strlen(__yp_token); ypdata.data = (u_char *)NULL; ypdata.size = 0; if ((dp->put)(dp, &ypkey, &ypdata, R_NOOVERWRITE) == -1) wr_error(pwd_db_tmp); } if ((dp->close)(dp) < 0) { wr_error(pwd_db_tmp); } if (makeold) { if (fflush(oldfp) == EOF) { wr_error(oldpwdfile); } if (fclose(oldfp) == EOF) { wr_error(oldpwdfile); } } /* Open the temporary encrypted password database. */ (void)snprintf(pwd_Sdb_tmp, sizeof(pwd_Sdb_tmp), "%s%s.tmp", prefix, _PATH_SMP_DB); edp = dbopen(pwd_Sdb_tmp, O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, &openinfo); if (!edp) error(pwd_Sdb_tmp); clean = FILE_SECURE; rewind(fp); for (cnt = 1; scan(fp, &pwd, &flags); ++cnt) { if (lorder != BYTE_ORDER) { M_32_SWAP(pwd.pw_uid); M_32_SWAP(pwd.pw_gid); M_32_SWAP(pwd.pw_change); M_32_SWAP(pwd.pw_expire); M_32_SWAP(flags); } /* Create secure data. */ p = buf; COMPACT(pwd.pw_name); COMPACT(pwd.pw_passwd); memmove(p, &pwd.pw_uid, sizeof(pwd.pw_uid)); p += sizeof(pwd.pw_uid); memmove(p, &pwd.pw_gid, sizeof(pwd.pw_gid)); p += sizeof(pwd.pw_gid); memmove(p, &pwd.pw_change, sizeof(pwd.pw_change)); p += sizeof(pwd.pw_change); COMPACT(pwd.pw_class); COMPACT(pwd.pw_gecos); COMPACT(pwd.pw_dir); COMPACT(pwd.pw_shell); memmove(p, &pwd.pw_expire, sizeof(pwd.pw_expire)); p += sizeof(pwd.pw_expire); memmove(p, &flags, sizeof(flags)); p += sizeof(flags); data.size = p - buf; /* Store secure by name. */ tbuf[0] = _PW_KEYBYNAME; len = strlen(pwd.pw_name); memmove(tbuf + 1, pwd.pw_name, len); key.size = len + 1; if ((edp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) wr_error(pwd_Sdb_tmp); /* Store secure by number. */ tbuf[0] = _PW_KEYBYNUM; x = cnt; if (lorder != BYTE_ORDER) M_32_SWAP(x); memmove(tbuf + 1, &x, sizeof(x)); key.size = sizeof(x) + 1; if ((edp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) wr_error(pwd_Sdb_tmp); /* Store secure by uid. */ tbuf[0] = _PW_KEYBYUID; memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid)); key.size = sizeof(pwd.pw_uid) + 1; if ((edp->put)(edp, &key, &data, R_NOOVERWRITE) == -1) wr_error(pwd_Sdb_tmp); } /* Store YP token, if needed. */ if(hasyp) { ypkey.data = (u_char *)__yp_token; ypkey.size = strlen(__yp_token); ypdata.data = (u_char *)NULL; ypdata.size = 0; if((edp->put)(edp, &ypkey, &ypdata, R_NOOVERWRITE) == -1) wr_error(pwd_Sdb_tmp); } if ((edp->close)(edp) < 0) { wr_error(_PATH_SMP_DB); } /* Set master.passwd permissions, in case caller forgot. */ (void)fchmod(fileno(fp), S_IRUSR|S_IWUSR); if (fclose(fp) == EOF) { wr_error(pname); } /* Install as the real password files. */ { char destination[MAXPATHLEN]; (void)snprintf(destination, sizeof(destination), "%s%s", prefix, _PATH_MP_DB); mv(pwd_db_tmp, destination); (void)snprintf(destination, sizeof(destination), "%s%s", prefix, _PATH_SMP_DB); mv(pwd_Sdb_tmp, destination); if (makeold) { (void)snprintf(destination, sizeof(destination), "%s%s", prefix, _PATH_PASSWD); mv(oldpwdfile, destination); } /* * Move the master password LAST -- chpass(1), * passwd(1) and vipw(8) all use flock(2) on it to * block other incarnations of themselves. The rename * means that everything is unlocked, as the original * file can no longer be accessed. */ (void)snprintf(destination, sizeof(destination), "%s%s", prefix, _PATH_MASTERPASSWD); mv(pname, destination); } exit(0); } int scan(fp, pw, flags) FILE *fp; struct passwd *pw; u_int32_t *flags; { static int lcnt; static char line[LINE_MAX]; char *p; int oflags; if (!fgets(line, sizeof(line), fp)) return (0); ++lcnt; /* * ``... if I swallow anything evil, put your fingers down my * throat...'' * -- The Who */ if (!(p = strchr(line, '\n'))) { warnx("line too long"); goto fmt; } *p = '\0'; if (strcmp(line, "+") == 0) strcpy(line, "+:::::::::"); /* pw_scan() can't handle "+" */ oflags = 0; if (!pw_scan(line, pw, &oflags)) { warnx("at line #%d", lcnt); fmt: errno = EFTYPE; /* XXX */ error(pname); } *flags = oflags; return (1); } void mv(from, to) char *from, *to; { char buf[MAXPATHLEN]; if (rename(from, to)) { int sverrno = errno; (void)snprintf(buf, sizeof(buf), "%s to %s", from, to); errno = sverrno; error(buf); } } void wr_error(name) char *name; { char errbuf[BUFSIZ]; int sverrno = errno; (void)snprintf(errbuf, sizeof(errbuf), "attempt to write %s failed", name); errno = sverrno; error(errbuf); } void error(name) char *name; { warn(name); cleanup(); #ifdef think_about_this_a_while_longer fputs("NOTE: possible inconsistencies between text files and databases\n", stderr); fputs("re-run pwd_mkdb when you have fixed the problem.\n", stderr); #endif exit(1); } void rm(victim) char *victim; { if (unlink(victim) < 0) { warn("unlink(%s)", victim); } } void cleanup() { switch(clean) { case FILE_ORIG: rm(oldpwdfile); /* FALLTHROUGH */ case FILE_SECURE: rm(pwd_Sdb_tmp); /* FALLTHROUGH */ case FILE_INSECURE: rm(pwd_db_tmp); } } void usage() { (void)fprintf(stderr, "usage: pwd_mkdb [-pBL] [-d directory] file\n"); exit(1); }