diff options
Diffstat (limited to 'usr.bin/passwd/pw_fastmkdb.c')
| -rw-r--r-- | usr.bin/passwd/pw_fastmkdb.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/usr.bin/passwd/pw_fastmkdb.c b/usr.bin/passwd/pw_fastmkdb.c new file mode 100644 index 0000000000000..eaa986a08c4e6 --- /dev/null +++ b/usr.bin/passwd/pw_fastmkdb.c @@ -0,0 +1,268 @@ +/*- + * Copyright (c) 1991 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. + */ + +#include <sys/param.h> +#include <sys/stat.h> +#include <signal.h> +#include <fcntl.h> +#include <db.h> +#include <pwd.h> +#include <errno.h> +#include <limits.h> +#include <stdio.h> +#include <string.h> + +/* #define PW_COMPACT */ +/* Compact pwd.db/spwd.db structure by Alex G. Bulushev, bag@demos.su */ +#ifdef PW_COMPACT +# define HI_BSIZE 1024 +# define HI_NELEM 4500 +# define HI_CACHE (1024 * 1024) +#else +# define HI_BSIZE 2048 +# define HI_NELEM 4500 +# define HI_CACHE (4000 * 1024) +#endif + +#define INSECURE 1 +#define SECURE 2 +#define PERM_INSECURE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) +#define PERM_SECURE (S_IRUSR|S_IWUSR) + +static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean; +static struct passwd pwd; /* password structure */ + +extern char *tempname; +extern char *progname; +extern int globcnt; + +pw_fastmkdb(new_pwd) + struct passwd *new_pwd; +{ + register int len; + register char *p, *t; + DB *dp, *edp; + sigset_t set; + DBT data, key; +#ifdef PW_COMPACT + DBT pdata, sdata; +#endif + char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024]; + char buf2[MAX(MAXPATHLEN, LINE_MAX * 2)]; + int uid; + int gid; + HASHINFO openinfo; + + /* Hash database parameters */ + openinfo.bsize=HI_BSIZE; + openinfo.ffactor=32; + openinfo.nelem=HI_NELEM; /* Default value was 300 */ + openinfo.cachesize=HI_CACHE; /* Default value was 512 */ + openinfo.hash=NULL; + openinfo.lorder=0; + + /* + * This could be done 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); + + /* Open the insecure password database. */ + dp = dbopen(_PATH_MP_DB, O_RDWR, PERM_INSECURE, DB_HASH, &openinfo); + if (!dp) + error(_PATH_MP_DB); + /* + * 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.) + */ + bcopy((char *)new_pwd, (char *)&pwd, sizeof(struct passwd)); + data.data = (u_char *)buf; + key.data = (u_char *)tbuf; +#ifdef PW_COMPACT + pdata.data = (u_char *)&globcnt; + pdata.size = sizeof(int); + sdata.data = (u_char *)pwd.pw_passwd; + sdata.size = strlen(pwd.pw_passwd) + 1; +#endif +#define COMPACT(e) t = e; while (*p++ = *t++); + + /* Create insecure data. */ + uid = pwd.pw_uid; /* force a particular size */ + gid = pwd.pw_gid; + p = buf; + COMPACT(pwd.pw_name); +#ifndef PW_COMPACT + COMPACT("*"); +#endif + bcopy((char *)&uid, p, sizeof(uid)); + p += sizeof(int); + bcopy((char *)&gid, p, sizeof(gid)); + p += sizeof(int); + bcopy((char *)&pwd.pw_change, p, sizeof(time_t)); + p += sizeof(time_t); + COMPACT(pwd.pw_class); + COMPACT(pwd.pw_gecos); + COMPACT(pwd.pw_dir); + COMPACT(pwd.pw_shell); + bcopy((char *)&pwd.pw_expire, p, sizeof(time_t)); + p += sizeof(time_t); + data.size = p - buf; + + /* Store insecure by name. */ + tbuf[0] = _PW_KEYBYNAME; + len = strlen(pwd.pw_name); + bcopy(pwd.pw_name, tbuf + 1, len); + key.size = len + 1; +#ifdef PW_COMPACT + if ((dp->put)(dp, &key, &pdata, 0) == -1) +#else + if ((dp->put)(dp, &key, &data, 0) == -1) +#endif + error("put"); + + /* Store insecure by uid. */ + tbuf[0] = _PW_KEYBYUID; + bcopy((char *)&uid, tbuf + 1, sizeof(uid)); + key.size = sizeof(uid) + 1; +#ifdef PW_COMPACT + if ((dp->put)(dp, &key, &pdata, 0) == -1) +#else + if ((dp->put)(dp, &key, &data, 0) == -1) +#endif + error("put"); + + /* Store insecure by number. */ + tbuf[0] = _PW_KEYBYNUM; + bcopy((char *)&globcnt, tbuf + 1, sizeof(globcnt)); + key.size = sizeof(globcnt) + 1; + if ((dp->put)(dp, &key, &data, 0) == -1) + error("put"); + + (void)(dp->close)(dp); + + /* Open the encrypted password database. */ + edp = dbopen(_PATH_SMP_DB, O_RDWR, PERM_SECURE, DB_HASH, &openinfo); + if (!edp) + error(_PATH_SMP_DB); +#ifdef PW_COMPACT + /* Store secure. */ + if ((edp->put)(edp, &key, &sdata, 0) == -1) + error("put"); +#else + + /* Create secure data. */ + p = buf; + COMPACT(pwd.pw_name); + COMPACT(pwd.pw_passwd); + bcopy((char *)&uid, p, sizeof(uid)); + p += sizeof(int); + bcopy((char *)&gid, p, sizeof(gid)); + p += sizeof(int); + bcopy((char *)&pwd.pw_change, p, sizeof(time_t)); + p += sizeof(time_t); + COMPACT(pwd.pw_class); + COMPACT(pwd.pw_gecos); + COMPACT(pwd.pw_dir); + COMPACT(pwd.pw_shell); + bcopy((char *)&pwd.pw_expire, p, sizeof(time_t)); + p += sizeof(time_t); + data.size = p - buf; + + /* Store secure by name. */ + tbuf[0] = _PW_KEYBYNAME; + len = strlen(pwd.pw_name); + bcopy(pwd.pw_name, tbuf + 1, len); + key.size = len + 1; + if ((edp->put)(edp, &key, &data, 0) == -1) + error("put"); + + /* Store secure by number. */ + tbuf[0] = _PW_KEYBYNUM; + bcopy((char *)&globcnt, tbuf + 1, sizeof(globcnt)); + key.size = sizeof(globcnt) + 1; + if ((edp->put)(edp, &key, &data, 0) == -1) + error("put"); + + /* Store secure by uid. */ + tbuf[0] = _PW_KEYBYUID; + bcopy((char *)&uid, tbuf + 1, sizeof(uid)); + key.size = sizeof(uid) + 1; + if ((edp->put)(edp, &key, &data, 0) == -1) + error("put"); +#endif + + (void)(edp->close)(edp); + + /* + * 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. + */ + mv(tempname, _PATH_MASTERPASSWD); + return(0); +} + +mv(from, to) + char *from, *to; +{ + int sverrno; + char buf[MAXPATHLEN]; + + if (rename(from, to)) { + sverrno = errno; + (void)sprintf(buf, "%s to %s", from, to); + errno = sverrno; + error(buf); + } +} + +error(name) + char *name; +{ + (void)fprintf(stderr, "%s: %s: %s\n", progname, name, strerror(errno)); + return(-1); +} |