Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

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

1 files changed, 678 insertions, 0 deletions

diff --git a/source3/utils/smbpasswd.c b/source3/utils/smbpasswd.c
new file mode 100644
index 0000000..f2c5dfd
--- /dev/null
+++ b/source3/utils/smbpasswd.c
@@ -0,0 +1,678 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * Copyright (C) Jeremy Allison 1995-1998
+ * Copyright (C) Tim Potter     2001
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, see <http://www.gnu.org/licenses/>.  */
+
+#include "includes.h"
+#include "system/passwd.h"
+#include "secrets.h"
+#include "../librpc/gen_ndr/samr.h"
+#include "../lib/util/util_pw.h"
+#include "libsmb/proto.h"
+#include "passdb.h"
+#include "cmdline_contexts.h"
+#include "passwd_proto.h"
+#include "lib/util/string_wrappers.h"
+#include "lib/param/param.h"
+#include "lib/util/memcache.h"
+
+/*
+ * Next two lines needed for SunOS and don't
+ * hurt anything else...
+ */
+extern char *optarg;
+extern int optind;
+
+/* forced running in root-mode */
+static bool got_username = False;
+static bool stdin_passwd_get = False;
+static fstring user_name;
+static char *new_passwd = NULL;
+static const char *remote_machine = NULL;
+
+static fstring ldap_secret;
+
+
+/*********************************************************
+ Print command usage on stderr and die.
+**********************************************************/
+static void usage(void)
+{
+	printf("When run by root:\n");
+	printf("    smbpasswd [options] [username]\n");
+	printf("otherwise:\n");
+	printf("    smbpasswd [options]\n\n");
+
+	printf("options:\n");
+	printf("  -L                   local mode (must be first option)\n");
+	printf("  -h                   print this usage message\n");
+	printf("  -s                   use stdin for password prompt\n");
+	printf("  -c smb.conf file     Use the given path to the smb.conf file\n");
+	printf("  -D LEVEL             debug level\n");
+	printf("  -r MACHINE           remote machine\n");
+	printf("  -U USER              remote username (e.g. SAM/user)\n");
+
+	printf("extra options when run by root or in local mode:\n");
+	printf("  -a                   add user\n");
+	printf("  -d                   disable user\n");
+	printf("  -e                   enable user\n");
+	printf("  -i                   interdomain trust account\n");
+	printf("  -m                   machine trust account\n");
+	printf("  -n                   set no password\n");
+	printf("  -W                   use stdin ldap admin password\n");
+	printf("  -w PASSWORD          ldap admin password\n");
+	printf("  -x                   delete user\n");
+	printf("  -R ORDER             name resolve order\n");
+
+	exit(1);
+}
+
+static void set_line_buffering(FILE *f)
+{
+	setvbuf(f, NULL, _IOLBF, 0);
+}
+
+/*******************************************************************
+ Process command line options
+ ******************************************************************/
+
+static int process_options(int argc, char **argv, int local_flags,
+			   struct loadparm_context *lp_ctx)
+{
+	int ch;
+	const char *configfile = get_dyn_CONFIGFILE();
+
+	local_flags |= LOCAL_SET_PASSWORD;
+
+	ZERO_STRUCT(user_name);
+
+	user_name[0] = '\0';
+
+	while ((ch = getopt(argc, argv, "c:axdehminjr:sw:R:D:U:LWS:")) != EOF) {
+		switch(ch) {
+		case 'L':
+			if (getuid() != 0) {
+				fprintf(stderr, "smbpasswd -L can only be used by root.\n");
+				exit(1);
+			}
+			local_flags |= LOCAL_AM_ROOT;
+			break;
+		case 'c':
+			configfile = optarg;
+			set_dyn_CONFIGFILE(optarg);
+			break;
+		case 'a':
+			local_flags |= LOCAL_ADD_USER;
+			break;
+		case 'x':
+			local_flags |= LOCAL_DELETE_USER;
+			local_flags &= ~LOCAL_SET_PASSWORD;
+			break;
+		case 'd':
+			local_flags |= LOCAL_DISABLE_USER;
+			local_flags &= ~LOCAL_SET_PASSWORD;
+			break;
+		case 'e':
+			local_flags |= LOCAL_ENABLE_USER;
+			local_flags &= ~LOCAL_SET_PASSWORD;
+			break;
+		case 'm':
+			local_flags |= LOCAL_TRUST_ACCOUNT;
+			break;
+		case 'i':
+			local_flags |= LOCAL_INTERDOM_ACCOUNT;
+			break;
+		case 'j':
+			d_printf("See 'net join' for this functionality\n");
+			exit(1);
+			break;
+		case 'n':
+			local_flags |= LOCAL_SET_NO_PASSWORD;
+			local_flags &= ~LOCAL_SET_PASSWORD;
+			SAFE_FREE(new_passwd);
+			new_passwd = smb_xstrdup("NO PASSWORD");
+			break;
+		case 'r':
+			remote_machine = optarg;
+			break;
+		case 's':
+			set_line_buffering(stdin);
+			set_line_buffering(stdout);
+			set_line_buffering(stderr);
+			stdin_passwd_get = True;
+			break;
+		case 'w':
+			local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
+			fstrcpy(ldap_secret, optarg);
+			break;
+		case 'R':
+			lpcfg_set_cmdline(lp_ctx, "name resolve order", optarg);
+			break;
+		case 'D':
+			lpcfg_set_cmdline(lp_ctx, "log level", optarg);
+			break;
+		case 'U': {
+			got_username = True;
+			fstrcpy(user_name, optarg);
+			break;
+		case 'W':
+			local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
+			*ldap_secret = '\0';
+			break;
+		}
+		case 'h':
+		default:
+			usage();
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	switch(argc) {
+	case 0:
+		if (!got_username)
+			fstrcpy(user_name, "");
+		break;
+	case 1:
+		if (!(local_flags & LOCAL_AM_ROOT)) {
+			usage();
+		} else {
+			if (got_username) {
+				usage();
+			} else {
+				fstrcpy(user_name, argv[0]);
+			}
+		}
+		break;
+	default:
+		usage();
+	}
+
+	if (!lp_load_global(configfile)) {
+		fprintf(stderr, "Can't load %s - run testparm to debug it\n",
+			configfile);
+		exit(1);
+	}
+
+	return local_flags;
+}
+
+/*************************************************************
+ Utility function to prompt for new password.
+*************************************************************/
+static char *prompt_for_new_password(bool stdin_get)
+{
+	char *p;
+	fstring new_pw;
+
+	ZERO_ARRAY(new_pw);
+
+	p = get_pass("New SMB password:", stdin_get);
+	if (p == NULL) {
+		return NULL;
+	}
+
+	fstrcpy(new_pw, p);
+	SAFE_FREE(p);
+
+	p = get_pass("Retype new SMB password:", stdin_get);
+	if (p == NULL) {
+		return NULL;
+	}
+
+	if (strcmp(p, new_pw)) {
+		fprintf(stderr, "Mismatch - password unchanged.\n");
+		ZERO_ARRAY(new_pw);
+		SAFE_FREE(p);
+		return NULL;
+	}
+
+	return p;
+}
+
+
+/*************************************************************
+ Change a password either locally or remotely.
+*************************************************************/
+
+static NTSTATUS password_change(const char *remote_mach,
+				const char *domain, const char *username,
+				const char *old_passwd, const char *new_pw,
+				int local_flags)
+{
+	NTSTATUS ret;
+	char *err_str = NULL;
+	char *msg_str = NULL;
+
+	if (remote_mach != NULL) {
+		if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|
+				   LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
+				   LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
+			/* these things can't be done remotely yet */
+			fprintf(stderr, "Invalid remote operation!\n");
+			return NT_STATUS_UNSUCCESSFUL;
+		}
+		ret = remote_password_change(remote_mach,
+					     domain, username,
+					     old_passwd, new_pw, &err_str);
+	} else {
+		ret = local_password_change(username, local_flags, new_pw,
+					    &err_str, &msg_str);
+	}
+
+	if (msg_str) {
+		printf("%s", msg_str);
+	}
+	if (err_str) {
+		fprintf(stderr, "%s", err_str);
+	}
+	if (!NT_STATUS_IS_OK(ret) && !err_str) {
+		fprintf(stderr, "Failed to change password!\n");
+	}
+
+	SAFE_FREE(msg_str);
+	SAFE_FREE(err_str);
+	return ret;
+}
+
+/*******************************************************************
+ Store the LDAP admin password in secrets.tdb
+ ******************************************************************/
+static bool store_ldap_admin_pw (char* pw)
+{
+	if (!pw)
+		return False;
+
+	if (!secrets_init())
+		return False;
+
+	return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw);
+}
+
+
+/*************************************************************
+ Handle password changing for root.
+*************************************************************/
+
+static int process_root(int local_flags)
+{
+	struct passwd  *pwd;
+	int result = 0;
+	char *old_passwd = NULL;
+
+	if (local_flags & LOCAL_SET_LDAP_ADMIN_PW) {
+		const char *ldap_admin_dn = lp_ldap_admin_dn();
+		if ( ! *ldap_admin_dn ) {
+			DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
+			goto done;
+		}
+
+		printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
+		if ( ! *ldap_secret ) {
+			new_passwd = prompt_for_new_password(stdin_passwd_get);
+			if (new_passwd == NULL) {
+				fprintf(stderr, "Failed to read new password!\n");
+				exit(1);
+			}
+			fstrcpy(ldap_secret, new_passwd);
+		}
+		if (!store_ldap_admin_pw(ldap_secret)) {
+			DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
+		}
+		goto done;
+	}
+
+	/* Ensure passdb startup(). */
+	if(!initialize_password_db(False, NULL)) {
+		DEBUG(0, ("Failed to open passdb!\n"));
+		exit(1);
+	}
+
+	/* Ensure we have a SAM sid. */
+	get_global_sam_sid();
+
+	/*
+	 * Ensure both add/delete user are not set
+	 * Ensure add/delete user and either remote machine or join domain are
+	 * not both set.
+	 */
+	if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
+	   ((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
+		(remote_machine != NULL))) {
+		usage();
+	}
+
+	/* Only load interfaces if we are doing network operations. */
+
+	if (remote_machine) {
+		load_interfaces();
+	}
+
+	if (!user_name[0] && (pwd = getpwuid_alloc(talloc_tos(), geteuid()))) {
+		fstrcpy(user_name, pwd->pw_name);
+		TALLOC_FREE(pwd);
+	}
+
+	if (!user_name[0]) {
+		fprintf(stderr,"You must specify a username\n");
+		exit(1);
+	}
+
+	if (local_flags & LOCAL_TRUST_ACCOUNT) {
+		/* add the $ automatically */
+		size_t user_name_len = strlen(user_name);
+
+		if (user_name[user_name_len - 1] == '$') {
+			user_name_len--;
+		} else {
+			if (user_name_len + 2 > sizeof(user_name)) {
+				fprintf(stderr, "machine name too long\n");
+				exit(1);
+			}
+			user_name[user_name_len] = '$';
+			user_name[user_name_len + 1] = '\0';
+		}
+
+		if (local_flags & LOCAL_ADD_USER) {
+		        SAFE_FREE(new_passwd);
+
+			/*
+			 * Remove any trailing '$' before we
+			 * generate the initial machine password.
+			 */
+			new_passwd = smb_xstrndup(user_name, user_name_len);
+			if (!strlower_m(new_passwd)) {
+				fprintf(stderr, "strlower_m %s failed\n",
+					new_passwd);
+				exit(1);
+			}
+		}
+	} else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
+		size_t user_name_len = strlen(user_name);
+
+		if (user_name[user_name_len - 1] != '$') {
+			if (user_name_len + 2 > sizeof(user_name)) {
+				fprintf(stderr, "machine name too long\n");
+				exit(1);
+			}
+			user_name[user_name_len] = '$';
+			user_name[user_name_len + 1] = '\0';
+		}
+
+		if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
+			/*
+			 * Prompt for trusting domain's account password
+			 */
+			new_passwd = prompt_for_new_password(stdin_passwd_get);
+			if(!new_passwd) {
+				fprintf(stderr, "Unable to get newpassword.\n");
+				exit(1);
+			}
+		}
+	} else {
+
+		if (remote_machine != NULL) {
+			old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
+			if(!old_passwd) {
+				fprintf(stderr, "Unable to get old password.\n");
+				exit(1);
+			}
+		}
+
+		if (!(local_flags & LOCAL_SET_PASSWORD)) {
+
+			/*
+			 * If we are trying to enable a user, first we need to find out
+			 * if they are using a modern version of the smbpasswd file that
+			 * disables a user by just writing a flag into the file. If so
+			 * then we can re-enable a user without prompting for a new
+			 * password. If not (ie. they have a no stored password in the
+			 * smbpasswd file) then we need to prompt for a new password.
+			 */
+
+			if(local_flags & LOCAL_ENABLE_USER) {
+				struct samu *sampass = NULL;
+
+				sampass = samu_new( NULL );
+				if (!sampass) {
+					fprintf(stderr, "talloc fail for struct samu.\n");
+					exit(1);
+				}
+				if (!pdb_getsampwnam(sampass, user_name)) {
+					fprintf(stderr, "Failed to find user %s in passdb backend.\n",
+						user_name );
+					exit(1);
+				}
+
+				if(pdb_get_nt_passwd(sampass) == NULL) {
+					local_flags |= LOCAL_SET_PASSWORD;
+				}
+				TALLOC_FREE(sampass);
+			}
+		}
+
+		if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
+
+			new_passwd = prompt_for_new_password(stdin_passwd_get);
+			if(!new_passwd) {
+				fprintf(stderr, "Unable to get new password.\n");
+				exit(1);
+			}
+		}
+	}
+
+	if (!NT_STATUS_IS_OK(password_change(remote_machine,
+					     NULL, user_name,
+					     old_passwd, new_passwd,
+					     local_flags))) {
+		result = 1;
+		goto done;
+	}
+
+	if(remote_machine) {
+		printf("Password changed for user %s on %s.\n", user_name, remote_machine );
+	} else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
+		struct samu *sampass = NULL;
+
+		sampass = samu_new( NULL );
+		if (!sampass) {
+			fprintf(stderr, "talloc fail for struct samu.\n");
+			exit(1);
+		}
+
+		if (!pdb_getsampwnam(sampass, user_name)) {
+			fprintf(stderr, "Failed to find user %s in passdb backend.\n",
+				user_name );
+			exit(1);
+		}
+
+		printf("Password changed for user %s.", user_name );
+		if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
+			printf(" User has disabled flag set.");
+		}
+		if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
+			printf(" User has no password flag set.");
+		}
+		printf("\n");
+		TALLOC_FREE(sampass);
+	}
+
+ done:
+	SAFE_FREE(old_passwd);
+	SAFE_FREE(new_passwd);
+	return result;
+}
+
+
+/*************************************************************
+ Handle password changing for non-root.
+*************************************************************/
+
+static int process_nonroot(int local_flags)
+{
+	struct passwd  *pwd = NULL;
+	int result = 0;
+	char *old_pw = NULL;
+	char *new_pw = NULL;
+	const char *username = user_name;
+	const char *domain = NULL;
+	char *p = NULL;
+
+	if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
+		/* Extra flags that we can't honor non-root */
+		usage();
+	}
+
+	if (!user_name[0]) {
+		pwd = getpwuid_alloc(talloc_tos(), getuid());
+		if (pwd) {
+			fstrcpy(user_name,pwd->pw_name);
+			TALLOC_FREE(pwd);
+		} else {
+			fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
+			exit(1);
+		}
+	}
+
+	/* Allow domain as part of the username */
+	if ((p = strchr_m(user_name, '\\')) ||
+	    (p = strchr_m(user_name, '/')) ||
+	    (p = strchr_m(user_name, *lp_winbind_separator()))) {
+		*p = '\0';
+		username = p + 1;
+		domain = user_name;
+	}
+
+	/*
+	 * A non-root user is always setting a password
+	 * via a remote machine (even if that machine is
+	 * localhost).
+	 */
+
+	load_interfaces(); /* Delayed from main() */
+
+	if (remote_machine != NULL) {
+		if (!is_ipaddress(remote_machine)) {
+			domain = remote_machine;
+		}
+	} else {
+		remote_machine = "127.0.0.1";
+
+		/*
+		 * If we deal with a local user, change the password for the
+		 * user in our SAM.
+		 */
+		domain = get_global_sam_name();
+	}
+
+	old_pw = get_pass("Old SMB password:",stdin_passwd_get);
+	if (old_pw == NULL) {
+		fprintf(stderr, "Unable to get old password.\n");
+		exit(1);
+	}
+
+	if (!new_passwd) {
+		new_pw = prompt_for_new_password(stdin_passwd_get);
+	}
+	else
+		new_pw = smb_xstrdup(new_passwd);
+
+	if (!new_pw) {
+		fprintf(stderr, "Unable to get new password.\n");
+		exit(1);
+	}
+
+	if (!NT_STATUS_IS_OK(password_change(remote_machine,
+					     domain, username,
+					     old_pw, new_pw, 0))) {
+		result = 1;
+		goto done;
+	}
+
+	printf("Password changed for user %s\n", username);
+
+ done:
+	SAFE_FREE(old_pw);
+	SAFE_FREE(new_pw);
+
+	return result;
+}
+
+
+
+/*********************************************************
+ Start here.
+**********************************************************/
+int main(int argc, char **argv)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	struct loadparm_context *lp_ctx = NULL;
+	struct memcache *mcache = NULL;
+	int local_flags = 0;
+	int ret;
+
+	mcache = memcache_init(NULL, 0);
+	if (mcache == NULL) {
+		fprintf(stderr, "%s: memcache_init failed\n", __location__);
+		return 1;
+	}
+	memcache_set_global(mcache);
+
+#if defined(HAVE_SET_AUTH_PARAMETERS)
+	set_auth_parameters(argc, argv);
+#endif /* HAVE_SET_AUTH_PARAMETERS */
+
+	if (getuid() == 0) {
+		local_flags = LOCAL_AM_ROOT;
+	}
+
+	smb_init_locale();
+
+	lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers());
+	if (lp_ctx == NULL) {
+		fprintf(stderr,
+			"Failed to initialise the global parameter structure.\n");
+		return 1;
+	}
+
+	local_flags = process_options(argc, argv, local_flags, lp_ctx);
+
+	setup_logging("smbpasswd", DEBUG_STDERR);
+
+	/* Check the effective uid - make sure we are not setuid */
+	if (is_setuid_root()) {
+		fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
+		exit(1);
+	}
+
+	if (local_flags & LOCAL_AM_ROOT) {
+		bool ok;
+
+		ok = secrets_init();
+		if (!ok) {
+			return 1;
+		}
+		ret = process_root(local_flags);
+	} else {
+		ret = process_nonroot(local_flags);
+	}
+
+	gfree_all();
+
+	TALLOC_FREE(frame);
+	return ret;
+}