/* * 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 #ident "$Id$" #include #include #include #include #include #include #include #include #include #include #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, --badnames 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); if (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[] = { {"badnames", 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); }