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-rw-r--r--src/newusers.c1344
1 files changed, 1344 insertions, 0 deletions
diff --git a/src/newusers.c b/src/newusers.c
new file mode 100644
index 0000000..deeb361
--- /dev/null
+++ b/src/newusers.c
@@ -0,0 +1,1344 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1993, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2000 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2011, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * newusers - create users from a batch file
+ *
+ * newusers creates a collection of entries in /etc/passwd
+ * and related files by reading a passwd-format file and
+ * adding entries in the related directories.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <pwd.h>
+#include <grp.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+#include "pam_defs.h"
+#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
+#include "prototypes.h"
+#include "defines.h"
+#include "getdef.h"
+#include "groupio.h"
+#include "nscd.h"
+#include "sssd.h"
+#include "pwio.h"
+#include "sgroupio.h"
+#include "shadowio.h"
+#ifdef ENABLE_SUBIDS
+#include "subordinateio.h"
+#endif /* ENABLE_SUBIDS */
+#include "chkname.h"
+#include "shadowlog.h"
+
+/*
+ * Global variables
+ */
+const char *Prog;
+
+static bool rflg = false; /* create a system account */
+#ifndef USE_PAM
+static /*@null@*//*@observer@*/char *crypt_method = NULL;
+#define cflg (NULL != crypt_method)
+#if defined(USE_SHA_CRYPT) || defined(USE_BCRYPT)
+static bool sflg = false;
+#endif
+#ifdef USE_SHA_CRYPT
+static long sha_rounds = 5000;
+#endif /* USE_SHA_CRYPT */
+#ifdef USE_BCRYPT
+static long bcrypt_rounds = 13;
+#endif /* USE_BCRYPT */
+#ifdef USE_YESCRYPT
+static long yescrypt_cost = 5;
+#endif /* USE_YESCRYPT */
+#endif /* !USE_PAM */
+
+static bool is_shadow;
+#ifdef SHADOWGRP
+static bool is_shadow_grp;
+static bool sgr_locked = false;
+#endif
+static bool pw_locked = false;
+static bool gr_locked = false;
+static bool spw_locked = false;
+#ifdef ENABLE_SUBIDS
+static bool is_sub_uid = false;
+static bool is_sub_gid = false;
+static bool sub_uid_locked = false;
+static bool sub_gid_locked = false;
+#endif /* ENABLE_SUBIDS */
+
+/* local function prototypes */
+static void usage (int status);
+static void fail_exit (int);
+static int add_group (const char *, const char *, gid_t *, gid_t);
+static int get_user_id (const char *, uid_t *);
+static int add_user (const char *, uid_t, gid_t);
+#ifndef USE_PAM
+static int update_passwd (struct passwd *, const char *);
+#endif /* !USE_PAM */
+static int add_passwd (struct passwd *, const char *);
+static void process_flags (int argc, char **argv);
+static void check_flags (void);
+static void check_perms (void);
+static void open_files (void);
+static void close_files (void);
+
+extern int allow_bad_names;
+
+/*
+ * usage - display usage message and exit
+ */
+static void usage (int status)
+{
+ FILE *usageout = (EXIT_SUCCESS != status) ? stderr : stdout;
+ (void) fprintf (usageout,
+ _("Usage: %s [options]\n"
+ "\n"
+ "Options:\n"),
+ Prog);
+ (void) fputs (_(" -b, --badname allow bad names\n"), usageout);
+#ifndef USE_PAM
+ (void) fprintf (usageout,
+ _(" -c, --crypt-method METHOD the crypt method (one of %s)\n"),
+ "NONE DES MD5"
+#if defined(USE_SHA_CRYPT)
+ " SHA256 SHA512"
+#endif
+#if defined(USE_BCRYPT)
+ " BCRYPT"
+#endif
+#if defined(USE_YESCRYPT)
+ " YESCRYPT"
+#endif
+ );
+#endif /* !USE_PAM */
+ (void) fputs (_(" -h, --help display this help message and exit\n"), usageout);
+ (void) fputs (_(" -r, --system create system accounts\n"), usageout);
+ (void) fputs (_(" -R, --root CHROOT_DIR directory to chroot into\n"), usageout);
+#ifndef USE_PAM
+#if defined(USE_SHA_CRYPT) || defined(USE_BCRYPT) || defined(USE_YESCRYPT)
+ (void) fputs (_(" -s, --sha-rounds number of rounds for the SHA, BCRYPT\n"
+ " or YESCRYPT crypt algorithms\n"),
+ usageout);
+#endif /* USE_SHA_CRYPT || USE_BCRYPT || USE_YESCRYPT */
+#endif /* !USE_PAM */
+ (void) fputs ("\n", usageout);
+
+ exit (status);
+}
+
+/*
+ * fail_exit - undo as much as possible
+ */
+static void fail_exit (int code)
+{
+ 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 */
+ }
+ }
+ 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 (gr_locked) {
+ if (gr_unlock () == 0) {
+ fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, gr_dbname ());
+ SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
+ /* continue */
+ }
+ }
+#ifdef SHADOWGRP
+ if (sgr_locked) {
+ if (sgr_unlock () == 0) {
+ fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sgr_dbname ());
+ SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
+ /* continue */
+ }
+ }
+#endif
+#ifdef ENABLE_SUBIDS
+ if (sub_uid_locked) {
+ if (sub_uid_unlock () == 0) {
+ fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_uid_dbname ());
+ SYSLOG ((LOG_ERR, "failed to unlock %s", sub_uid_dbname ()));
+ /* continue */
+ }
+ }
+ if (sub_gid_locked) {
+ if (sub_gid_unlock () == 0) {
+ fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_gid_dbname ());
+ SYSLOG ((LOG_ERR, "failed to unlock %s", sub_gid_dbname ()));
+ /* continue */
+ }
+ }
+#endif /* ENABLE_SUBIDS */
+
+ exit (code);
+}
+
+/*
+ * add_group - create a new group or add a user to an existing group
+ */
+static int add_group (const char *name, const char *gid, gid_t *ngid, uid_t uid)
+{
+ const struct group *grp;
+ struct group grent;
+ char *members[1];
+#ifdef SHADOWGRP
+ const struct sgrp *sg;
+#endif
+
+ /*
+ * Start by seeing if the named group already exists. This will be
+ * very easy to deal with if it does.
+ */
+ grp = getgrnam (gid);
+ if (NULL == grp) {
+ grp = gr_locate (gid);
+ }
+ if (NULL != grp) {
+ /* The user will use this ID for her primary group */
+ *ngid = grp->gr_gid;
+ /* Don't check gshadow */
+ return 0;
+ }
+
+ if (isdigit (gid[0])) {
+ /*
+ * The GID is a number, which means either this is a brand
+ * new group, or an existing group.
+ */
+
+ if (get_gid (gid, &grent.gr_gid) == 0) {
+ fprintf (stderr,
+ _("%s: invalid group ID '%s'\n"),
+ Prog, gid);
+ return -1;
+ }
+
+ /* Look in both the system database (getgrgid) and in the
+ * internal database (gr_locate_gid), which may contain
+ * uncommitted changes */
+ if ( (getgrgid ((gid_t) grent.gr_gid) != NULL)
+ || (gr_locate_gid ((gid_t) grent.gr_gid) != NULL)) {
+ /* The user will use this ID for her
+ * primary group */
+ *ngid = (gid_t) grent.gr_gid;
+ return 0;
+ }
+
+ /* Do not create groups with GID == (gid_t)-1 */
+ if (grent.gr_gid == (gid_t)-1) {
+ fprintf (stderr,
+ _("%s: invalid group ID '%s'\n"),
+ Prog, gid);
+ return -1;
+ }
+ } else {
+ /* The gid parameter can be "" or a name which is not
+ * already the name of an existing group.
+ * In both cases, figure out what group ID can be used.
+ */
+ if (find_new_gid(rflg, &grent.gr_gid, &uid) < 0) {
+ return -1;
+ }
+ }
+
+ /*
+ * Now I have all of the fields required to create the new group.
+ */
+ if (('\0' != gid[0]) && (!isdigit (gid[0]))) {
+ grent.gr_name = xstrdup (gid);
+ } else {
+ grent.gr_name = xstrdup (name);
+/* FIXME: check if the group exists */
+ }
+
+ /* Check if this is a valid group name */
+ if (!is_valid_group_name (grent.gr_name)) {
+ fprintf (stderr,
+ _("%s: invalid group name '%s'\n"),
+ Prog, grent.gr_name);
+ free (grent.gr_name);
+ return -1;
+ }
+
+ grent.gr_passwd = "*"; /* XXX warning: const */
+ members[0] = NULL;
+ grent.gr_mem = members;
+
+ *ngid = grent.gr_gid;
+
+#ifdef SHADOWGRP
+ if (is_shadow_grp) {
+ sg = sgr_locate (grent.gr_name);
+
+ if (NULL != sg) {
+ fprintf (stderr,
+ _("%s: group '%s' is a shadow group, but does not exist in /etc/group\n"),
+ Prog, grent.gr_name);
+ return -1;
+ }
+ }
+#endif
+
+#ifdef SHADOWGRP
+ if (is_shadow_grp) {
+ struct sgrp sgrent;
+ char *admins[1];
+ sgrent.sg_name = grent.gr_name;
+ sgrent.sg_passwd = "*"; /* XXX warning: const */
+ grent.gr_passwd = "x"; /* XXX warning: const */
+ admins[0] = NULL;
+ sgrent.sg_adm = admins;
+ sgrent.sg_mem = members;
+
+ if (sgr_update (&sgrent) == 0) {
+ return -1;
+ }
+ }
+#endif
+
+ if (gr_update (&grent) == 0) {
+ return -1;
+ }
+
+ return 0;
+}
+
+static int get_user_id (const char *uid, uid_t *nuid) {
+
+ /*
+ * The first guess for the UID is either the numerical UID that the
+ * caller provided, or the next available UID.
+ */
+ if (isdigit (uid[0])) {
+ if ((get_uid (uid, nuid) == 0) || (*nuid == (uid_t)-1)) {
+ fprintf (stderr,
+ _("%s: invalid user ID '%s'\n"),
+ Prog, uid);
+ return -1;
+ }
+ } else {
+ if ('\0' != uid[0]) {
+ const struct passwd *pwd;
+ /* local, no need for xgetpwnam */
+ pwd = getpwnam (uid);
+ if (NULL == pwd) {
+ pwd = pw_locate (uid);
+ }
+
+ if (NULL != pwd) {
+ *nuid = pwd->pw_uid;
+ } else {
+ fprintf (stderr,
+ _("%s: user '%s' does not exist\n"),
+ Prog, uid);
+ return -1;
+ }
+ } else {
+ if (find_new_uid (rflg, nuid, NULL) < 0) {
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * add_user - create a new user ID
+ */
+static int add_user (const char *name, uid_t uid, gid_t gid)
+{
+ struct passwd pwent;
+
+ /* Check if this is a valid user name */
+ if (!is_valid_user_name (name)) {
+ fprintf (stderr,
+ _("%s: invalid user name '%s': use --badname to ignore\n"),
+ Prog, name);
+ return -1;
+ }
+
+ /*
+ * I don't want to fill in the entire password structure members
+ * JUST YET, since there is still more data to be added. So, I fill
+ * in the parts that I have.
+ */
+ pwent.pw_name = xstrdup (name);
+ pwent.pw_uid = uid;
+ pwent.pw_passwd = "x"; /* XXX warning: const */
+ pwent.pw_gid = gid;
+ pwent.pw_gecos = ""; /* XXX warning: const */
+ pwent.pw_dir = ""; /* XXX warning: const */
+ pwent.pw_shell = ""; /* XXX warning: const */
+
+ return (pw_update (&pwent) == 0) ? -1 : 0;
+}
+
+#ifndef USE_PAM
+/*
+ * update_passwd - update the password in the passwd entry
+ *
+ * Return 0 if successful.
+ */
+static int update_passwd (struct passwd *pwd, const char *password)
+{
+ void *crypt_arg = NULL;
+ char *cp;
+ if (NULL != crypt_method) {
+#if defined(USE_SHA_CRYPT)
+ if (sflg) {
+ if ( (0 == strcmp (crypt_method, "SHA256"))
+ || (0 == strcmp (crypt_method, "SHA512"))) {
+ crypt_arg = &sha_rounds;
+ }
+ }
+#endif /* USE_SHA_CRYPT */
+#if defined(USE_BCRYPT)
+ if (sflg) {
+ if (0 == strcmp (crypt_method, "BCRYPT")) {
+ crypt_arg = &bcrypt_rounds;
+ }
+ }
+#endif /* USE_BCRYPT */
+#if defined(USE_YESCRYPT)
+ if (sflg) {
+ if (0 == strcmp (crypt_method, "YESCRYPT")) {
+ crypt_arg = &yescrypt_cost;
+ }
+ }
+#endif /* USE_YESCRYPT */
+ }
+
+ if ((NULL != crypt_method) && (0 == strcmp(crypt_method, "NONE"))) {
+ pwd->pw_passwd = (char *)password;
+ } else {
+ const char *salt = crypt_make_salt (crypt_method, crypt_arg);
+ cp = pw_encrypt (password, salt);
+ if (NULL == cp) {
+ fprintf (stderr,
+ _("%s: failed to crypt password with salt '%s': %s\n"),
+ Prog, salt, strerror (errno));
+ return 1;
+ }
+ pwd->pw_passwd = cp;
+ }
+
+ return 0;
+}
+#endif /* !USE_PAM */
+
+/*
+ * add_passwd - add or update the encrypted password
+ */
+static int add_passwd (struct passwd *pwd, const char *password)
+{
+ const struct spwd *sp;
+ struct spwd spent;
+#ifndef USE_PAM
+ char *cp;
+#endif /* !USE_PAM */
+
+#ifndef USE_PAM
+ void *crypt_arg = NULL;
+ if (NULL != crypt_method) {
+#if defined(USE_SHA_CRYPT)
+ if (sflg) {
+ if ( (0 == strcmp (crypt_method, "SHA256"))
+ || (0 == strcmp (crypt_method, "SHA512"))) {
+ crypt_arg = &sha_rounds;
+ }
+ }
+#endif /* USE_SHA_CRYPT */
+#if defined(USE_BCRYPT)
+ if (sflg) {
+ if (0 == strcmp (crypt_method, "BCRYPT")) {
+ crypt_arg = &bcrypt_rounds;
+ }
+ }
+#endif /* USE_BCRYPT */
+#if defined(USE_YESCRYPT)
+ if (sflg) {
+ if (0 == strcmp (crypt_method, "YESCRYPT")) {
+ crypt_arg = &yescrypt_cost;
+ }
+ }
+#endif /* USE_PAM */
+ }
+
+ /*
+ * In the case of regular password files, this is real easy - pwd
+ * points to the entry in the password file. Shadow files are
+ * harder since there are zillions of things to do ...
+ */
+ if (!is_shadow) {
+ return update_passwd (pwd, password);
+ }
+#endif /* USE_PAM */
+
+ /*
+ * Do the first and easiest shadow file case. The user already
+ * exists in the shadow password file.
+ */
+ sp = spw_locate (pwd->pw_name);
+#ifndef USE_PAM
+ if (NULL != sp) {
+ spent = *sp;
+ if ( (NULL != crypt_method)
+ && (0 == strcmp(crypt_method, "NONE"))) {
+ spent.sp_pwdp = (char *)password;
+ } else {
+ const char *salt = crypt_make_salt (crypt_method,
+ crypt_arg);
+ cp = pw_encrypt (password, salt);
+ if (NULL == cp) {
+ fprintf (stderr,
+ _("%s: failed to crypt password with salt '%s': %s\n"),
+ Prog, salt, strerror (errno));
+ return 1;
+ }
+ spent.sp_pwdp = cp;
+ }
+ spent.sp_lstchg = (long) gettime () / SCALE;
+ if (0 == spent.sp_lstchg) {
+ /* Better disable aging than requiring a password
+ * change */
+ spent.sp_lstchg = -1;
+ }
+ return (spw_update (&spent) == 0);
+ }
+
+ /*
+ * Pick the next easiest case - the user has an encrypted password
+ * which isn't equal to "x". The password was set to "x" earlier
+ * when the entry was created, so this user would have to have had
+ * the password set someplace else.
+ */
+ if (strcmp (pwd->pw_passwd, "x") != 0) {
+ return update_passwd (pwd, password);
+ }
+#else /* USE_PAM */
+ /*
+ * If there is already a shadow entry, do not touch it.
+ * If there is already a passwd entry with a password, do not
+ * touch it.
+ * The password will be updated later for all users using PAM.
+ */
+ if ( (NULL != sp)
+ || (strcmp (pwd->pw_passwd, "x") != 0)) {
+ return 0;
+ }
+#endif /* USE_PAM */
+
+ /*
+ * Now the really hard case - I need to create an entirely new
+ * shadow password file entry.
+ */
+ spent.sp_namp = pwd->pw_name;
+#ifndef USE_PAM
+ if ((crypt_method != NULL) && (0 == strcmp(crypt_method, "NONE"))) {
+ spent.sp_pwdp = (char *)password;
+ } else {
+ const char *salt = crypt_make_salt (crypt_method, crypt_arg);
+ cp = pw_encrypt (password, salt);
+ if (NULL == cp) {
+ fprintf (stderr,
+ _("%s: failed to crypt password with salt '%s': %s\n"),
+ Prog, salt, strerror (errno));
+ return 1;
+ }
+ spent.sp_pwdp = cp;
+ }
+#else
+ /*
+ * Lock the password.
+ * The password will be updated later for all users using PAM.
+ */
+ spent.sp_pwdp = "!";
+#endif
+ spent.sp_lstchg = (long) gettime () / SCALE;
+ if (0 == spent.sp_lstchg) {
+ /* Better disable aging than requiring a password change */
+ spent.sp_lstchg = -1;
+ }
+ spent.sp_min = getdef_num ("PASS_MIN_DAYS", 0);
+ /* 10000 is infinity this week */
+ spent.sp_max = getdef_num ("PASS_MAX_DAYS", 10000);
+ spent.sp_warn = getdef_num ("PASS_WARN_AGE", -1);
+ spent.sp_inact = -1;
+ spent.sp_expire = -1;
+ spent.sp_flag = SHADOW_SP_FLAG_UNSET;
+
+ return (spw_update (&spent) == 0);
+}
+
+/*
+ * process_flags - parse the command line options
+ *
+ * It will not return if an error is encountered.
+ */
+static void process_flags (int argc, char **argv)
+{
+ int c;
+#ifndef USE_PAM
+#if defined(USE_SHA_CRYPT) || defined(USE_BCRYPT) || defined(USE_YESCRYPT)
+ int bad_s;
+#endif /* USE_SHA_CRYPT || USE_BCRYPT || USE_YESCRYPT */
+#endif /* !USE_PAM */
+ static struct option long_options[] = {
+ {"badname", no_argument, NULL, 'b'},
+#ifndef USE_PAM
+ {"crypt-method", required_argument, NULL, 'c'},
+#endif /* !USE_PAM */
+ {"help", no_argument, NULL, 'h'},
+ {"system", no_argument, NULL, 'r'},
+ {"root", required_argument, NULL, 'R'},
+#ifndef USE_PAM
+#if defined(USE_SHA_CRYPT) || defined(USE_BCRYPT) || defined(USE_YESCRYPT)
+ {"sha-rounds", required_argument, NULL, 's'},
+#endif /* USE_SHA_CRYPT || USE_BCRYPT || USE_YESCRYPT */
+#endif /* !USE_PAM */
+ {NULL, 0, NULL, '\0'}
+ };
+
+ while ((c = getopt_long (argc, argv,
+#ifndef USE_PAM
+#if defined(USE_SHA_CRYPT) || defined(USE_BCRYPT) || defined(USE_YESCRYPT)
+ "c:bhrs:",
+#else /* !USE_SHA_CRYPT && !USE_BCRYPT && !USE_YESCRYPT */
+ "c:bhr",
+#endif /* USE_SHA_CRYPT || USE_BCRYPT || USE_YESCRYPT */
+#else /* USE_PAM */
+ "bhr",
+#endif
+ long_options, NULL)) != -1) {
+ switch (c) {
+ case 'b':
+ allow_bad_names = true;
+ break;
+#ifndef USE_PAM
+ case 'c':
+ crypt_method = optarg;
+ break;
+#endif /* !USE_PAM */
+ case 'h':
+ usage (EXIT_SUCCESS);
+ break;
+ case 'r':
+ rflg = true;
+ break;
+ case 'R': /* no-op, handled in process_root_flag () */
+ break;
+#ifndef USE_PAM
+#if defined(USE_SHA_CRYPT) || defined(USE_BCRYPT) || defined(USE_YESCRYPT)
+ case 's':
+ sflg = true;
+ bad_s = 0;
+#if defined(USE_SHA_CRYPT)
+ if ( ( ((0 == strcmp (crypt_method, "SHA256")) || (0 == strcmp (crypt_method, "SHA512")))
+ && (0 == getlong(optarg, &sha_rounds)))) {
+ bad_s = 1;
+ }
+#endif /* USE_SHA_CRYPT */
+#if defined(USE_BCRYPT)
+ if (( (0 == strcmp (crypt_method, "BCRYPT"))
+ && (0 == getlong(optarg, &bcrypt_rounds)))) {
+ bad_s = 1;
+ }
+#endif /* USE_BCRYPT */
+#if defined(USE_YESCRYPT)
+ if (( (0 == strcmp (crypt_method, "YESCRYPT"))
+ && (0 == getlong(optarg, &yescrypt_cost)))) {
+ bad_s = 1;
+ }
+#endif /* USE_YESCRYPT */
+ if (bad_s != 0) {
+ fprintf (stderr,
+ _("%s: invalid numeric argument '%s'\n"),
+ Prog, optarg);
+ usage (EXIT_FAILURE);
+ }
+ break;
+#endif /* USE_SHA_CRYPT || USE_BCRYPT || USE_YESCRYPT */
+#endif /* !USE_PAM */
+ default:
+ usage (EXIT_FAILURE);
+ break;
+ }
+ }
+
+ if ( (optind != argc)
+ && (optind + 1 != argc)) {
+ usage (EXIT_FAILURE);
+ }
+
+ if (argv[optind] != NULL) {
+ if (freopen (argv[optind], "r", stdin) == NULL) {
+ char buf[BUFSIZ];
+ snprintf (buf, sizeof buf, "%s: %s", Prog, argv[1]);
+ perror (buf);
+ fail_exit (EXIT_FAILURE);
+ }
+ }
+
+ /* validate options */
+ check_flags ();
+}
+
+/*
+ * check_flags - check flags and parameters consistency
+ *
+ * It will not return if an error is encountered.
+ */
+static void check_flags (void)
+{
+#ifndef USE_PAM
+#if defined(USE_SHA_CRYPT) || defined(USE_BCRYPT) || defined(USE_YESCRYPT)
+ if (sflg && !cflg) {
+ fprintf (stderr,
+ _("%s: %s flag is only allowed with the %s flag\n"),
+ Prog, "-s", "-c");
+ usage (EXIT_FAILURE);
+ }
+#endif /* USE_SHA_CRYPT || USE_BCRYPT || USE_YESCRYPT */
+
+ if (cflg) {
+ if ( (0 != strcmp (crypt_method, "DES"))
+ && (0 != strcmp (crypt_method, "MD5"))
+ && (0 != strcmp (crypt_method, "NONE"))
+#ifdef USE_SHA_CRYPT
+ && (0 != strcmp (crypt_method, "SHA256"))
+ && (0 != strcmp (crypt_method, "SHA512"))
+#endif /* USE_SHA_CRYPT */
+#ifdef USE_BCRYPT
+ && (0 != strcmp (crypt_method, "BCRYPT"))
+#endif /* USE_BCRYPT */
+#ifdef USE_YESCRYPT
+ && (0 != strcmp (crypt_method, "YESCRYPT"))
+#endif /* USE_YESCRYPT */
+ ) {
+ fprintf (stderr,
+ _("%s: unsupported crypt method: %s\n"),
+ Prog, crypt_method);
+ usage (EXIT_FAILURE);
+ }
+ }
+#endif /* !USE_PAM */
+}
+
+/*
+ * check_perms - check if the caller is allowed to add a group
+ *
+ * With PAM support, the setuid bit can be set on groupadd to allow
+ * non-root users to groups.
+ * Without PAM support, only users who can write in the group databases
+ * can add groups.
+ *
+ * It will not return if the user is not allowed.
+ */
+static void check_perms (void)
+{
+#ifdef ACCT_TOOLS_SETUID
+#ifdef USE_PAM
+ pam_handle_t *pamh = NULL;
+ int retval;
+ struct passwd *pampw;
+
+ pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
+ if (NULL == pampw) {
+ fprintf (stderr,
+ _("%s: Cannot determine your user name.\n"),
+ Prog);
+ fail_exit (EXIT_FAILURE);
+ }
+
+ retval = pam_start ("newusers", pampw->pw_name, &conv, &pamh);
+
+ if (PAM_SUCCESS == retval) {
+ retval = pam_authenticate (pamh, 0);
+ }
+
+ if (PAM_SUCCESS == retval) {
+ retval = pam_acct_mgmt (pamh, 0);
+ }
+
+ if (PAM_SUCCESS != retval) {
+ fprintf (stderr, _("%s: PAM: %s\n"),
+ Prog, pam_strerror (pamh, retval));
+ SYSLOG((LOG_ERR, "%s", pam_strerror (pamh, retval)));
+ if (NULL != pamh) {
+ (void) pam_end (pamh, retval);
+ }
+ fail_exit (EXIT_FAILURE);
+ }
+ (void) pam_end (pamh, retval);
+#endif /* USE_PAM */
+#endif /* ACCT_TOOLS_SETUID */
+}
+
+/*
+ * open_files - lock and open the password, group and shadow databases
+ */
+static void open_files (void)
+{
+ /*
+ * Lock the password files and open them for update. This will bring
+ * all of the entries into memory where they may be searched for an
+ * modified, or new entries added. The password file is the key - if
+ * it gets locked, assume the others can be locked right away.
+ */
+ if (pw_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, pw_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ pw_locked = true;
+ if (is_shadow) {
+ if (spw_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, spw_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ spw_locked = true;
+ }
+ if (gr_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, gr_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ gr_locked = true;
+#ifdef SHADOWGRP
+ if (is_shadow_grp) {
+ if (sgr_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, sgr_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ sgr_locked = true;
+ }
+#endif
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid) {
+ if (sub_uid_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, sub_uid_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ sub_uid_locked = true;
+ }
+ if (is_sub_gid) {
+ if (sub_gid_lock () == 0) {
+ fprintf (stderr,
+ _("%s: cannot lock %s; try again later.\n"),
+ Prog, sub_gid_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ sub_gid_locked = true;
+ }
+#endif /* ENABLE_SUBIDS */
+
+ if (pw_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr, _("%s: cannot open %s\n"), Prog, pw_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ if (is_shadow && (spw_open (O_CREAT | O_RDWR) == 0)) {
+ fprintf (stderr, _("%s: cannot open %s\n"), Prog, spw_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ if (gr_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr, _("%s: cannot open %s\n"), Prog, gr_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+#ifdef SHADOWGRP
+ if (is_shadow_grp && (sgr_open (O_CREAT | O_RDWR) == 0)) {
+ fprintf (stderr, _("%s: cannot open %s\n"), Prog, sgr_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+#endif
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid) {
+ if (sub_uid_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, sub_uid_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ }
+ if (is_sub_gid) {
+ if (sub_gid_open (O_CREAT | O_RDWR) == 0) {
+ fprintf (stderr,
+ _("%s: cannot open %s\n"),
+ Prog, sub_gid_dbname ());
+ fail_exit (EXIT_FAILURE);
+ }
+ }
+#endif /* ENABLE_SUBIDS */
+}
+
+/*
+ * close_files - close and unlock the password, group and shadow databases
+ */
+static void close_files (void)
+{
+ 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 (EXIT_FAILURE);
+ }
+ 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 */
+ }
+ pw_locked = false;
+
+ if (is_shadow) {
+ 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 (EXIT_FAILURE);
+ }
+ 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 */
+ }
+ spw_locked = false;
+ }
+
+ if (gr_close () == 0) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"),
+ Prog, gr_dbname ());
+ SYSLOG ((LOG_ERR, "failure while writing changes to %s", gr_dbname ()));
+ fail_exit (EXIT_FAILURE);
+ }
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid && (sub_uid_close () == 0)) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"), Prog, sub_uid_dbname ());
+ SYSLOG ((LOG_ERR, "failure while writing changes to %s", sub_uid_dbname ()));
+ fail_exit (EXIT_FAILURE);
+ }
+ if (is_sub_gid && (sub_gid_close () == 0)) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"), Prog, sub_gid_dbname ());
+ SYSLOG ((LOG_ERR, "failure while writing changes to %s", sub_gid_dbname ()));
+ fail_exit (EXIT_FAILURE);
+ }
+#endif /* ENABLE_SUBIDS */
+
+ if (gr_unlock () == 0) {
+ fprintf (stderr,
+ _("%s: failed to unlock %s\n"),
+ Prog, gr_dbname ());
+ SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
+ /* continue */
+ }
+ gr_locked = false;
+
+#ifdef SHADOWGRP
+ if (is_shadow_grp) {
+ if (sgr_close () == 0) {
+ fprintf (stderr,
+ _("%s: failure while writing changes to %s\n"),
+ Prog, sgr_dbname ());
+ SYSLOG ((LOG_ERR, "failure while writing changes to %s", sgr_dbname ()));
+ fail_exit (EXIT_FAILURE);
+ }
+ if (sgr_unlock () == 0) {
+ fprintf (stderr,
+ _("%s: failed to unlock %s\n"),
+ Prog, sgr_dbname ());
+ SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
+ /* continue */
+ }
+ sgr_locked = false;
+ }
+#endif
+#ifdef ENABLE_SUBIDS
+ if (is_sub_uid) {
+ if (sub_uid_unlock () == 0) {
+ fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_uid_dbname ());
+ SYSLOG ((LOG_ERR, "failed to unlock %s", sub_uid_dbname ()));
+ /* continue */
+ }
+ sub_uid_locked = false;
+ }
+ if (is_sub_gid) {
+ if (sub_gid_unlock () == 0) {
+ fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, sub_gid_dbname ());
+ SYSLOG ((LOG_ERR, "failed to unlock %s", sub_gid_dbname ()));
+ /* continue */
+ }
+ sub_gid_locked = false;
+ }
+#endif /* ENABLE_SUBIDS */
+}
+
+static bool want_subuids(void)
+{
+ if (get_subid_nss_handle() != NULL)
+ return false;
+ if (getdef_ulong ("SUB_UID_COUNT", 65536) == 0)
+ return false;
+ return true;
+}
+
+static bool want_subgids(void)
+{
+ if (get_subid_nss_handle() != NULL)
+ return false;
+ if (getdef_ulong ("SUB_GID_COUNT", 65536) == 0)
+ return false;
+ return true;
+}
+
+int main (int argc, char **argv)
+{
+ char buf[BUFSIZ];
+ char *fields[8];
+ int nfields;
+ char *cp;
+ const struct passwd *pw;
+ struct passwd newpw;
+ int errors = 0;
+ int line = 0;
+ uid_t uid;
+ gid_t gid;
+#ifdef USE_PAM
+ int *lines = NULL;
+ char **usernames = NULL;
+ char **passwords = NULL;
+ unsigned int nusers = 0;
+#endif /* USE_PAM */
+
+ Prog = Basename (argv[0]);
+ log_set_progname(Prog);
+ log_set_logfd(stderr);
+
+ (void) setlocale (LC_ALL, "");
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) textdomain (PACKAGE);
+
+ /* FIXME: will not work with an input file */
+ process_root_flag ("-R", argc, argv);
+
+ OPENLOG ("newusers");
+
+ process_flags (argc, argv);
+
+ check_perms ();
+
+ is_shadow = spw_file_present ();
+
+#ifdef SHADOWGRP
+ is_shadow_grp = sgr_file_present ();
+#endif
+#ifdef ENABLE_SUBIDS
+ is_sub_uid = sub_uid_file_present () && !rflg;
+ is_sub_gid = sub_gid_file_present () && !rflg;
+#endif /* ENABLE_SUBIDS */
+
+ open_files ();
+
+ /*
+ * Read each line. The line has the same format as a password file
+ * entry, except that certain fields are not constrained to be
+ * numerical values. If a group ID is entered which does not already
+ * exist, an attempt is made to allocate the same group ID as the
+ * numerical user ID. Should that fail, the next available group ID
+ * over 100 is allocated. The pw_gid field will be updated with that
+ * value.
+ */
+ while (fgets (buf, (int) sizeof buf, stdin) != (char *) 0) {
+ line++;
+ cp = strrchr (buf, '\n');
+ if (NULL != cp) {
+ *cp = '\0';
+ } else {
+ if (feof (stdin) == 0) {
+ fprintf (stderr,
+ _("%s: line %d: line too long\n"),
+ Prog, line);
+ errors++;
+ continue;
+ }
+ }
+
+ /*
+ * Break the string into fields and screw around with them.
+ * There MUST be 7 colon separated fields, although the
+ * values aren't that particular.
+ */
+ for (cp = buf, nfields = 0; nfields < 7; nfields++) {
+ fields[nfields] = cp;
+ cp = strchr (cp, ':');
+ if (NULL != cp) {
+ *cp = '\0';
+ cp++;
+ } else {
+ break;
+ }
+ }
+ if (nfields != 6) {
+ fprintf (stderr, _("%s: line %d: invalid line\n"),
+ Prog, line);
+ errors++;
+ continue;
+ }
+
+ /*
+ * First check if we have to create or update an user
+ */
+ pw = pw_locate (fields[0]);
+ /* local, no need for xgetpwnam */
+ if ( (NULL == pw)
+ && (getpwnam (fields[0]) != NULL)) {
+ fprintf (stderr, _("%s: cannot update the entry of user %s (not in the passwd database)\n"), Prog, fields[0]);
+ errors++;
+ continue;
+ }
+
+ if ( (NULL == pw)
+ && (get_user_id (fields[2], &uid) != 0)) {
+ fprintf (stderr,
+ _("%s: line %d: can't create user\n"),
+ Prog, line);
+ errors++;
+ continue;
+ }
+
+ /*
+ * Processed is the group name. A new group will be
+ * created if the group name is non-numeric and does not
+ * already exist. If the group name is a number (which is not
+ * an existing GID), a group with the same name as the user
+ * will be created, with the given GID. The given or created
+ * group will be the primary group of the user. If
+ * there is no named group to be a member of, the UID will
+ * be figured out and that value will be a candidate for a
+ * new group, if that group ID exists, a whole new group ID
+ * will be made up.
+ */
+ if ( (NULL == pw)
+ && (add_group (fields[0], fields[3], &gid, uid) != 0)) {
+ fprintf (stderr,
+ _("%s: line %d: can't create group\n"),
+ Prog, line);
+ errors++;
+ continue;
+ }
+
+ /*
+ * Now we work on the user ID. It has to be specified either
+ * as a numerical value, or left blank. If it is a numerical
+ * value, that value will be used, otherwise the next
+ * available user ID is computed and used. After this there
+ * will at least be a (struct passwd) for the user.
+ */
+ if ( (NULL == pw)
+ && (add_user (fields[0], uid, gid) != 0)) {
+ fprintf (stderr,
+ _("%s: line %d: can't create user\n"),
+ Prog, line);
+ errors++;
+ continue;
+ }
+
+ /*
+ * The password, gecos field, directory, and shell fields
+ * all come next.
+ */
+ pw = pw_locate (fields[0]);
+ if (NULL == pw) {
+ fprintf (stderr,
+ _("%s: line %d: user '%s' does not exist in %s\n"),
+ Prog, line, fields[0], pw_dbname ());
+ errors++;
+ continue;
+ }
+ newpw = *pw;
+
+#ifdef USE_PAM
+ /* keep the list of user/password for later update by PAM */
+ nusers++;
+ lines = realloc (lines, sizeof (lines[0]) * nusers);
+ usernames = realloc (usernames, sizeof (usernames[0]) * nusers);
+ passwords = realloc (passwords, sizeof (passwords[0]) * nusers);
+ lines[nusers-1] = line;
+ usernames[nusers-1] = strdup (fields[0]);
+ passwords[nusers-1] = strdup (fields[1]);
+#endif /* USE_PAM */
+ if (add_passwd (&newpw, fields[1]) != 0) {
+ fprintf (stderr,
+ _("%s: line %d: can't update password\n"),
+ Prog, line);
+ errors++;
+ continue;
+ }
+ if ('\0' != fields[4][0]) {
+ newpw.pw_gecos = fields[4];
+ }
+
+ if ('\0' != fields[5][0]) {
+ newpw.pw_dir = fields[5];
+ }
+
+ if ('\0' != fields[6][0]) {
+ newpw.pw_shell = fields[6];
+ }
+
+ if ( ('\0' != fields[5][0])
+ && (access (newpw.pw_dir, F_OK) != 0)) {
+/* FIXME: should check for directory */
+ mode_t mode = getdef_num ("HOME_MODE",
+ 0777 & ~getdef_num ("UMASK", GETDEF_DEFAULT_UMASK));
+ if (newpw.pw_dir[0] != '/') {
+ fprintf(stderr,
+ _("%s: line %d: homedir must be an absolute path\n"),
+ Prog, line);
+ errors++;
+ continue;
+ };
+ if (mkdir (newpw.pw_dir, mode) != 0) {
+ fprintf (stderr,
+ _("%s: line %d: mkdir %s failed: %s\n"),
+ Prog, line, newpw.pw_dir,
+ strerror (errno));
+ } else if (chown (newpw.pw_dir,
+ newpw.pw_uid,
+ newpw.pw_gid) != 0) {
+ fprintf (stderr,
+ _("%s: line %d: chown %s failed: %s\n"),
+ Prog, line, newpw.pw_dir,
+ strerror (errno));
+ }
+ }
+
+ /*
+ * Update the password entry with the new changes made.
+ */
+ if (pw_update (&newpw) == 0) {
+ fprintf (stderr,
+ _("%s: line %d: can't update entry\n"),
+ Prog, line);
+ errors++;
+ continue;
+ }
+
+#ifdef ENABLE_SUBIDS
+ /*
+ * Add subordinate uids if the user does not have them.
+ */
+ if (is_sub_uid && want_subuids() && !local_sub_uid_assigned(fields[0])) {
+ uid_t sub_uid_start = 0;
+ unsigned long sub_uid_count = 0;
+ if (find_new_sub_uids(&sub_uid_start, &sub_uid_count) == 0) {
+ if (sub_uid_add(fields[0], sub_uid_start, sub_uid_count) == 0) {
+ fprintf (stderr,
+ _("%s: failed to prepare new %s entry\n"),
+ Prog, sub_uid_dbname ());
+ }
+ } else {
+ fprintf (stderr,
+ _("%s: can't find subordinate user range\n"),
+ Prog);
+ errors++;
+ }
+ }
+
+ /*
+ * Add subordinate gids if the user does not have them.
+ */
+ if (is_sub_gid && want_subgids() && !local_sub_gid_assigned(fields[0])) {
+ gid_t sub_gid_start = 0;
+ unsigned long sub_gid_count = 0;
+ if (find_new_sub_gids(&sub_gid_start, &sub_gid_count) == 0) {
+ if (sub_gid_add(fields[0], sub_gid_start, sub_gid_count) == 0) {
+ fprintf (stderr,
+ _("%s: failed to prepare new %s entry\n"),
+ Prog, sub_uid_dbname ());
+ }
+ } else {
+ fprintf (stderr,
+ _("%s: can't find subordinate group range\n"),
+ Prog);
+ errors++;
+ }
+ }
+#endif /* ENABLE_SUBIDS */
+ }
+
+ /*
+ * Any detected errors will cause the entire set of changes to be
+ * aborted. Unlocking the password file will cause all of the
+ * changes to be ignored. Otherwise the file is closed, causing the
+ * changes to be written out all at once, and then unlocked
+ * afterwards.
+ */
+ if (0 != errors) {
+ fprintf (stderr,
+ _("%s: error detected, changes ignored\n"), Prog);
+ fail_exit (EXIT_FAILURE);
+ }
+
+ close_files ();
+
+ nscd_flush_cache ("passwd");
+ nscd_flush_cache ("group");
+ sssd_flush_cache (SSSD_DB_PASSWD | SSSD_DB_GROUP);
+
+#ifdef USE_PAM
+ unsigned int i;
+ /* Now update the passwords using PAM */
+ for (i = 0; i < nusers; i++) {
+ if (do_pam_passwd_non_interactive ("newusers", usernames[i], passwords[i]) != 0) {
+ fprintf (stderr,
+ _("%s: (line %d, user %s) password not changed\n"),
+ Prog, lines[i], usernames[i]);
+ errors++;
+ }
+ }
+#endif /* USE_PAM */
+
+ return ((0 == errors) ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 05:11:40 +0000