Add endianness support.
While version 4 entries are architecture-independent, we also store old (version 3) entries in native byte order. Also, the hash itself is created in a native byte order. With this change, pwd_mkdb(8) can be used to cross-build *pwd.db files for another architecture. Tested on: i386, amd64, alpha, sparc64
This commit is contained in:
Ruslan Ermilov
parent
ab16a51bbb
commit
e2db8d3732
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=142832
@ -28,7 +28,7 @@
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.\" @(#)pwd_mkdb.8 8.1 (Berkeley) 6/6/93
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.\" $FreeBSD$
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.\"
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.Dd June 6, 1993
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.Dd February 28, 2005
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.Dt PWD_MKDB 8
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.Os
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.Sh NAME
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@ -36,10 +36,7 @@
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.Nd "generate the password databases"
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.Sh SYNOPSIS
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.Nm
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.Op Fl C
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.Op Fl N
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.Op Fl p
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.Op Fl i
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.Op Fl BCiLNp
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.Op Fl d Ar directory
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.Op Fl s Ar cachesize
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.Op Fl u Ar username
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@ -64,10 +61,14 @@ different from the historic Version 7 style format.
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.Pp
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The options are as follows:
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.Bl -tag -width flag
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.It Fl B
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Store data in big-endian format.
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.It Fl C
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Check if the password file is in the correct format.
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Do not
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change, add, or remove any files.
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.It Fl L
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Store data in little-endian format.
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.It Fl N
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Tell
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.Nm
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@ -42,6 +42,7 @@ static char sccsid[] = "@(#)pwd_mkdb.c 8.5 (Berkeley) 4/20/94";
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/endian.h>
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#include <sys/stat.h>
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#include <arpa/inet.h>
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@ -72,7 +73,7 @@ HASHINFO openinfo = {
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256, /* nelem */
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2048 * 1024, /* cachesize */
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NULL, /* hash() */
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0 /* lorder */
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BYTE_ORDER /* lorder */
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};
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static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean;
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@ -101,7 +102,6 @@ main(int argc, char *argv[])
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sigset_t set;
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int ch, cnt, ypcnt, makeold, tfd, yp_enabled = 0;
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unsigned int len;
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int32_t pw_change, pw_expire;
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uint32_t store;
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const char *t;
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char *p;
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@ -118,11 +118,17 @@ main(int argc, char *argv[])
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strcpy(prefix, _PATH_PWD);
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makeold = 0;
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username = NULL;
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while ((ch = getopt(argc, argv, "CNd:ips:u:v")) != -1)
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while ((ch = getopt(argc, argv, "BCLNd:ips:u:v")) != -1)
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switch(ch) {
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case 'B': /* big-endian output */
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openinfo.lorder = BIG_ENDIAN;
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break;
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case 'C': /* verify only */
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Cflag = 1;
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break;
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case 'L': /* little-endian output */
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openinfo.lorder = LITTLE_ENDIAN;
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break;
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case 'N': /* do not wait for lock */
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nblock = LOCK_NB; /* will fail if locked */
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break;
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@ -353,10 +359,14 @@ main(int argc, char *argv[])
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#define SCALAR(e) store = htonl((uint32_t)(e)); \
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memmove(p, &store, sizeof(store)); \
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p += sizeof(store);
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#define LSCALAR(e) store = HTOL((uint32_t)(e)); \
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memmove(p, &store, sizeof(store)); \
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p += sizeof(store);
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#define HTOL(e) (openinfo.lorder == BYTE_ORDER ? \
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(uint32_t)(e) : \
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bswap32((uint32_t)(e)))
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if (!is_comment &&
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(!username || (strcmp(username, pwd.pw_name) == 0))) {
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pw_change = pwd.pw_change;
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pw_expire = pwd.pw_expire;
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/* Create insecure data. */
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p = buf;
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COMPACT(pwd.pw_name);
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@ -452,40 +462,30 @@ main(int argc, char *argv[])
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p = buf;
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COMPACT(pwd.pw_name);
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COMPACT("*");
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memmove(p, &pwd.pw_uid, sizeof(pwd.pw_uid));
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p += sizeof(int);
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memmove(p, &pwd.pw_gid, sizeof(pwd.pw_gid));
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p += sizeof(int);
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memmove(p, &pw_change, sizeof(pw_change));
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p += sizeof(pw_change);
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LSCALAR(pwd.pw_uid);
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LSCALAR(pwd.pw_gid);
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LSCALAR(pwd.pw_change);
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COMPACT(pwd.pw_class);
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COMPACT(pwd.pw_gecos);
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COMPACT(pwd.pw_dir);
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COMPACT(pwd.pw_shell);
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memmove(p, &pw_expire, sizeof(pw_expire));
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p += sizeof(pw_expire);
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memmove(p, &pwd.pw_fields, sizeof pwd.pw_fields);
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p += sizeof pwd.pw_fields;
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LSCALAR(pwd.pw_expire);
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LSCALAR(pwd.pw_fields);
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data.size = p - buf;
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/* Create secure data. (legacy version) */
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p = sbuf;
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COMPACT(pwd.pw_name);
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COMPACT(pwd.pw_passwd);
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memmove(p, &pwd.pw_uid, sizeof(pwd.pw_uid));
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p += sizeof(int);
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memmove(p, &pwd.pw_gid, sizeof(pwd.pw_gid));
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p += sizeof(int);
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memmove(p, &pw_change, sizeof(pw_change));
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p += sizeof(pw_change);
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LSCALAR(pwd.pw_uid);
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LSCALAR(pwd.pw_gid);
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LSCALAR(pwd.pw_change);
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COMPACT(pwd.pw_class);
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COMPACT(pwd.pw_gecos);
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COMPACT(pwd.pw_dir);
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COMPACT(pwd.pw_shell);
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memmove(p, &pw_expire, sizeof(pw_expire));
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p += sizeof(pw_expire);
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memmove(p, &pwd.pw_fields, sizeof pwd.pw_fields);
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p += sizeof pwd.pw_fields;
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LSCALAR(pwd.pw_expire);
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LSCALAR(pwd.pw_fields);
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sdata.size = p - sbuf;
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/* Store insecure by name. */
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@ -498,15 +498,17 @@ main(int argc, char *argv[])
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/* Store insecure by number. */
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tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM);
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memmove(tbuf + 1, &cnt, sizeof(cnt));
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key.size = sizeof(cnt) + 1;
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store = HTOL(cnt);
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memmove(tbuf + 1, &store, sizeof(store));
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key.size = sizeof(store) + 1;
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if ((dp->put)(dp, &key, &data, method) == -1)
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error("put");
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/* Store insecure by uid. */
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tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID);
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memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid));
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key.size = sizeof(pwd.pw_uid) + 1;
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store = HTOL(pwd.pw_uid);
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memmove(tbuf + 1, &store, sizeof(store));
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key.size = sizeof(store) + 1;
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if ((dp->put)(dp, &key, &data, methoduid) == -1)
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error("put");
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@ -520,24 +522,27 @@ main(int argc, char *argv[])
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/* Store secure by number. */
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tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM);
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memmove(tbuf + 1, &cnt, sizeof(cnt));
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key.size = sizeof(cnt) + 1;
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store = HTOL(cnt);
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memmove(tbuf + 1, &store, sizeof(store));
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key.size = sizeof(store) + 1;
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if ((sdp->put)(sdp, &key, &sdata, method) == -1)
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error("put");
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/* Store secure by uid. */
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tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID);
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memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid));
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key.size = sizeof(pwd.pw_uid) + 1;
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store = HTOL(pwd.pw_uid);
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memmove(tbuf + 1, &store, sizeof(store));
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key.size = sizeof(store) + 1;
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if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1)
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error("put");
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/* Store insecure and secure special plus and special minus */
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if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') {
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tbuf[0] = LEGACY_VERSION(_PW_KEYYPBYNUM);
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memmove(tbuf + 1, &ypcnt, sizeof(cnt));
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store = HTOL(ypcnt);
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memmove(tbuf + 1, &store, sizeof(store));
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ypcnt++;
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key.size = sizeof(cnt) + 1;
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key.size = sizeof(store) + 1;
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if ((dp->put)(dp, &key, &data, method) == -1)
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error("put");
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if ((sdp->put)(sdp, &key, &sdata, method) == -1)
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@ -746,6 +751,6 @@ usage(void)
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{
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(void)fprintf(stderr,
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"usage: pwd_mkdb [-C] [-N] [-i] [-p] [-d <dest dir>] [-s <cachesize>] [-u <local username>] file\n");
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"usage: pwd_mkdb [-BCiLNp] [-d directory] [-s cachesize] [-u username] file\n");
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exit(1);
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}
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