Adding upstream version 1:4.13+dfsg1.upstream/1%4.13+dfsg1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 316 insertions, 0 deletions

diff --git a/src/pwconv.c b/src/pwconv.c
new file mode 100644
index 0000000..21d36e7
--- /dev/null
+++ b/src/pwconv.c
@@ -0,0 +1,316 @@
+/*
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2002 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2009 - 2012, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * pwconv - create or update /etc/shadow with information from
+ * /etc/passwd.
+ *
+ * It is more like SysV pwconv, slightly different from the original Shadow
+ * pwconv. Depends on "x" as password in /etc/passwd which means that the
+ * password has already been moved to /etc/shadow. There is no need to move
+ * /etc/npasswd to /etc/passwd, password files are updated using library
+ * routines with proper locking.
+ *
+ * Can be used to update /etc/shadow after adding/deleting users by editing
+ * /etc/passwd. There is no man page yet, but this program should be close
+ * to pwconv(1M) on Solaris 2.x.
+ *
+ * Warning: make sure that all users have "x" as the password in /etc/passwd
+ * before running this program for the first time on a system which already
+ * has shadow passwords. Anything else (like "*" from old versions of the
+ * shadow suite) will replace the user's encrypted password in /etc/shadow.
+ *
+ * Doesn't currently support pw_age information in /etc/passwd, and doesn't
+ * support DBM files. Add it if you need it...
+ *
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <getopt.h>
+#include "defines.h"
+#include "getdef.h"
+#include "prototypes.h"
+#include "pwio.h"
+#include "shadowio.h"
+#include "nscd.h"
+#include "sssd.h"
+#include "shadowlog.h"
+
+/*
+ * exit status values
+ */
+/*@-exitarg@*/
+#define E_SUCCESS	0	/* success */
+#define E_NOPERM	1	/* permission denied */
+#define E_USAGE		2	/* invalid command syntax */
+#define E_FAILURE	3	/* unexpected failure, nothing done */
+#define E_MISSING	4	/* unexpected failure, passwd file missing */
+#define E_PWDBUSY	5	/* passwd file(s) busy */
+#define E_BADENTRY	6	/* bad shadow entry */
+/*
+ * Global variables
+ */
+const char *Prog;
+
+static bool spw_locked = false;
+static bool pw_locked = false;
+
+/* local function prototypes */
+static void fail_exit (int status);
+static void usage (int status);
+static void process_flags (int argc, char **argv);
+
+static void fail_exit (int status)
+{
+	if (pw_locked) {
+		if (pw_unlock () == 0) {
+			fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
+			SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
+			/* continue */
+		}
+	}
+
+	if (spw_locked) {
+		if (spw_unlock () == 0) {
+			fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ());
+			SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
+			/* continue */
+		}
+	}
+
+	exit (status);
+}
+
+static void usage (int status)
+{
+	FILE *usageout = (E_SUCCESS != status) ? stderr : stdout;
+	(void) fprintf (usageout,
+	                _("Usage: %s [options]\n"
+	                  "\n"
+	                  "Options:\n"),
+	                Prog);
+	(void) fputs (_("  -h, --help                    display this help message and exit\n"), usageout);
+	(void) fputs (_("  -R, --root CHROOT_DIR         directory to chroot into\n"), usageout);
+	(void) fputs ("\n", usageout);
+	exit (status);
+}
+
+/*
+ * process_flags - parse the command line options
+ *
+ *	It will not return if an error is encountered.
+ */
+static void process_flags (int argc, char **argv)
+{
+	/*
+	 * Parse the command line options.
+	 */
+	int c;
+	static struct option long_options[] = {
+		{"help", no_argument,       NULL, 'h'},
+		{"root", required_argument, NULL, 'R'},
+		{NULL, 0, NULL, '\0'}
+	};
+
+	while ((c = getopt_long (argc, argv, "hR:",
+	                         long_options, NULL)) != -1) {
+		switch (c) {
+		case 'h':
+			usage (E_SUCCESS);
+			/*@notreached@*/break;
+		case 'R': /* no-op, handled in process_root_flag () */
+			break;
+		default:
+			usage (E_USAGE);
+		}
+	}
+
+	if (optind != argc) {
+		usage (E_USAGE);
+	}
+}
+
+int main (int argc, char **argv)
+{
+	const struct passwd *pw;
+	struct passwd pwent;
+	const struct spwd *sp;
+	struct spwd spent;
+
+	Prog = Basename (argv[0]);
+	log_set_progname(Prog);
+	log_set_logfd(stderr);
+
+	(void) setlocale (LC_ALL, "");
+	(void) bindtextdomain (PACKAGE, LOCALEDIR);
+	(void) textdomain (PACKAGE);
+
+	process_root_flag ("-R", argc, argv);
+
+	OPENLOG ("pwconv");
+
+	process_flags (argc, argv);
+
+#ifdef WITH_TCB
+	if (getdef_bool("USE_TCB")) {
+		fprintf (stderr, _("%s: can't work with tcb enabled\n"), Prog);
+		exit (E_FAILURE);
+	}
+#endif				/* WITH_TCB */
+
+	if (pw_lock () == 0) {
+		fprintf (stderr,
+		         _("%s: cannot lock %s; try again later.\n"),
+		         Prog, pw_dbname ());
+		fail_exit (E_PWDBUSY);
+	}
+	pw_locked = true;
+	if (pw_open (O_CREAT | O_RDWR) == 0) {
+		fprintf (stderr,
+		         _("%s: cannot open %s\n"), Prog, pw_dbname ());
+		fail_exit (E_MISSING);
+	}
+
+	if (spw_lock () == 0) {
+		fprintf (stderr,
+		         _("%s: cannot lock %s; try again later.\n"),
+		         Prog, spw_dbname ());
+		fail_exit (E_PWDBUSY);
+	}
+	spw_locked = true;
+	if (spw_open (O_CREAT | O_RDWR) == 0) {
+		fprintf (stderr,
+		         _("%s: cannot open %s\n"), Prog, spw_dbname ());
+		fail_exit (E_FAILURE);
+	}
+
+	/*
+	 * Remove /etc/shadow entries for users not in /etc/passwd.
+	 */
+	(void) spw_rewind ();
+	while ((sp = spw_next ()) != NULL) {
+		if (pw_locate (sp->sp_namp) != NULL) {
+			continue;
+		}
+
+		if (spw_remove (sp->sp_namp) == 0) {
+			/*
+			 * This shouldn't happen (the entry exists) but...
+			 */
+			fprintf (stderr,
+			         _("%s: cannot remove entry '%s' from %s\n"),
+			         Prog, sp->sp_namp, spw_dbname ());
+			fail_exit (E_FAILURE);
+		}
+		(void) spw_rewind();
+	}
+
+	/*
+	 * Update shadow entries which don't have "x" as pw_passwd. Add any
+	 * missing shadow entries.
+	 */
+	(void) pw_rewind ();
+	while ((pw = pw_next ()) != NULL) {
+		sp = spw_locate (pw->pw_name);
+		if (NULL != sp) {
+			/* do we need to update this entry? */
+			if (strcmp (pw->pw_passwd, SHADOW_PASSWD_STRING) == 0) {
+				continue;
+			}
+			/* update existing shadow entry */
+			spent = *sp;
+		} else {
+			/* add new shadow entry */
+			memset (&spent, 0, sizeof spent);
+			spent.sp_namp   = pw->pw_name;
+			spent.sp_min    = getdef_num ("PASS_MIN_DAYS", -1);
+			spent.sp_max    = getdef_num ("PASS_MAX_DAYS", -1);
+			spent.sp_warn   = getdef_num ("PASS_WARN_AGE", -1);
+			spent.sp_inact  = -1;
+			spent.sp_expire = -1;
+			spent.sp_flag   = SHADOW_SP_FLAG_UNSET;
+		}
+		spent.sp_pwdp = pw->pw_passwd;
+		spent.sp_lstchg = (long) gettime () / SCALE;
+		if (0 == spent.sp_lstchg) {
+			/* Better disable aging than requiring a password
+			 * change */
+			spent.sp_lstchg = -1;
+		}
+		if (spw_update (&spent) == 0) {
+			fprintf (stderr,
+			         _("%s: failed to prepare the new %s entry '%s'\n"),
+			         Prog, spw_dbname (), spent.sp_namp);
+			fail_exit (E_FAILURE);
+		}
+
+		/* remove password from /etc/passwd */
+		pwent = *pw;
+		pwent.pw_passwd = SHADOW_PASSWD_STRING;	/* XXX warning: const */
+		if (pw_update (&pwent) == 0) {
+			fprintf (stderr,
+			         _("%s: failed to prepare the new %s entry '%s'\n"),
+			         Prog, pw_dbname (), pwent.pw_name);
+			fail_exit (E_FAILURE);
+		}
+	}
+
+	if (spw_close () == 0) {
+		fprintf (stderr,
+		         _("%s: failure while writing changes to %s\n"),
+		         Prog, spw_dbname ());
+		SYSLOG ((LOG_ERR, "failure while writing changes to %s", spw_dbname ()));
+		fail_exit (E_FAILURE);
+	}
+	if (pw_close () == 0) {
+		fprintf (stderr,
+		         _("%s: failure while writing changes to %s\n"),
+		         Prog, pw_dbname ());
+		SYSLOG ((LOG_ERR, "failure while writing changes to %s", pw_dbname ()));
+		fail_exit (E_FAILURE);
+	}
+
+	/* /etc/passwd- (backup file) */
+	errno = 0;
+	if ((chmod (PASSWD_FILE "-", 0600) != 0) && (errno != ENOENT)) {
+		fprintf (stderr,
+		         _("%s: failed to change the mode of %s to 0600\n"),
+		         Prog, PASSWD_FILE "-");
+		SYSLOG ((LOG_ERR, "failed to change the mode of %s to 0600", PASSWD_FILE "-"));
+		/* continue */
+	}
+
+	if (pw_unlock () == 0) {
+		fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
+		SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
+		/* continue */
+	}
+
+	if (spw_unlock () == 0) {
+		fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ());
+		SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
+		/* continue */
+	}
+
+	nscd_flush_cache ("passwd");
+	sssd_flush_cache (SSSD_DB_PASSWD);
+
+	return E_SUCCESS;
+}
+