s3-samr: move chgpasswd.c out of smbd and into the samr server.

Guenther

1 files changed, 0 insertions, 1122 deletions

diff --git a/source3/smbd/chgpasswd.c b/source3/smbd/chgpasswd.c
deleted file mode 100644
index 3a23321889..0000000000
--- a/source3/smbd/chgpasswd.c
+++ /dev/null
@@ -1,1122 +0,0 @@
-/* 
-   Unix SMB/CIFS implementation.
-   Samba utility functions
-   Copyright (C) Andrew Tridgell 1992-1998
-   Copyright (C) Andrew Bartlett 2001-2004
-
-   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/>.
-*/
-
-/* These comments regard the code to change the user's unix password: */
-
-/* fork a child process to exec passwd and write to its
- * tty to change a users password. This is running as the
- * user who is attempting to change the password.
- */
-
-/*
- * This code was copied/borrowed and stolen from various sources.
- * The primary source was the poppasswd.c from the authors of POPMail. This software
- * was included as a client to change passwords using the 'passwd' program
- * on the remote machine.
- *
- * This code has been hacked by Bob Nance (nance@niehs.nih.gov) and Evan Patterson
- * (patters2@niehs.nih.gov) at the National Institute of Environmental Health Sciences
- * and rights to modify, distribute or incorporate this change to the CAP suite or
- * using it for any other reason are granted, so long as this disclaimer is left intact.
- */
-
-/*
-   This code was hacked considerably for inclusion in Samba, primarily
-   by Andrew.Tridgell@anu.edu.au. The biggest change was the addition
-   of the "password chat" option, which allows the easy runtime
-   specification of the expected sequence of events to change a
-   password.
-   */
-
-#include "includes.h"
-#include "../libcli/auth/libcli_auth.h"
-#include "../lib/crypto/arcfour.h"
-
-#if ALLOW_CHANGE_PASSWORD
-
-static int findpty(char **slave)
-{
-	int master = -1;
-	char *line = NULL;
-	SMB_STRUCT_DIR *dirp = NULL;
-	const char *dpname;
-
-	*slave = NULL;
-
-#if defined(HAVE_GRANTPT)
-	/* Try to open /dev/ptmx. If that fails, fall through to old method. */
-	if ((master = sys_open("/dev/ptmx", O_RDWR, 0)) >= 0) {
-		grantpt(master);
-		unlockpt(master);
-		line = (char *)ptsname(master);
-		if (line) {
-			*slave = SMB_STRDUP(line);
-		}
-
-		if (*slave == NULL) {
-			DEBUG(0,
-			      ("findpty: Unable to create master/slave pty pair.\n"));
-			/* Stop fd leak on error. */
-			close(master);
-			return -1;
-		} else {
-			DEBUG(10,
-			      ("findpty: Allocated slave pty %s\n", *slave));
-			return (master);
-		}
-	}
-#endif /* HAVE_GRANTPT */
-
-	line = SMB_STRDUP("/dev/ptyXX");
-	if (!line) {
-		return (-1);
-	}
-
-	dirp = sys_opendir("/dev");
-	if (!dirp) {
-		SAFE_FREE(line);
-		return (-1);
-	}
-
-	while ((dpname = readdirname(dirp)) != NULL) {
-		if (strncmp(dpname, "pty", 3) == 0 && strlen(dpname) == 5) {
-			DEBUG(3,
-			      ("pty: try to open %s, line was %s\n", dpname,
-			       line));
-			line[8] = dpname[3];
-			line[9] = dpname[4];
-			if ((master = sys_open(line, O_RDWR, 0)) >= 0) {
-				DEBUG(3, ("pty: opened %s\n", line));
-				line[5] = 't';
-				*slave = line;
-				sys_closedir(dirp);
-				return (master);
-			}
-		}
-	}
-	sys_closedir(dirp);
-	SAFE_FREE(line);
-	return (-1);
-}
-
-static int dochild(int master, const char *slavedev, const struct passwd *pass,
-		   const char *passwordprogram, bool as_root)
-{
-	int slave;
-	struct termios stermios;
-	gid_t gid;
-	uid_t uid;
-	char * const eptrs[1] = { NULL };
-
-	if (pass == NULL)
-	{
-		DEBUG(0,
-		      ("dochild: user doesn't exist in the UNIX password database.\n"));
-		return False;
-	}
-
-	gid = pass->pw_gid;
-	uid = pass->pw_uid;
-
-	gain_root_privilege();
-
-	/* Start new session - gets rid of controlling terminal. */
-	if (setsid() < 0)
-	{
-		DEBUG(3,
-		      ("Weirdness, couldn't let go of controlling terminal\n"));
-		return (False);
-	}
-
-	/* Open slave pty and acquire as new controlling terminal. */
-	if ((slave = sys_open(slavedev, O_RDWR, 0)) < 0)
-	{
-		DEBUG(3, ("More weirdness, could not open %s\n", slavedev));
-		return (False);
-	}
-#if defined(TIOCSCTTY) && !defined(SUNOS5)
-	/*
-	 * On patched Solaris 10 TIOCSCTTY is defined but seems not to work,
-	 * see the discussion under
-	 * https://bugzilla.samba.org/show_bug.cgi?id=5366.
-	 */
-	if (ioctl(slave, TIOCSCTTY, 0) < 0)
-	{
-		DEBUG(3, ("Error in ioctl call for slave pty\n"));
-		/* return(False); */
-	}
-#elif defined(I_PUSH) && defined(I_FIND)
-	if (ioctl(slave, I_FIND, "ptem") == 0) {
-		ioctl(slave, I_PUSH, "ptem");
-	}
-	if (ioctl(slave, I_FIND, "ldterm") == 0) {
-		ioctl(slave, I_PUSH, "ldterm");
-	}
-#endif
-
-	/* Close master. */
-	close(master);
-
-	/* Make slave stdin/out/err of child. */
-
-	if (dup2(slave, STDIN_FILENO) != STDIN_FILENO)
-	{
-		DEBUG(3, ("Could not re-direct stdin\n"));
-		return (False);
-	}
-	if (dup2(slave, STDOUT_FILENO) != STDOUT_FILENO)
-	{
-		DEBUG(3, ("Could not re-direct stdout\n"));
-		return (False);
-	}
-	if (dup2(slave, STDERR_FILENO) != STDERR_FILENO)
-	{
-		DEBUG(3, ("Could not re-direct stderr\n"));
-		return (False);
-	}
-	if (slave > 2)
-		close(slave);
-
-	/* Set proper terminal attributes - no echo, canonical input processing,
-	   no map NL to CR/NL on output. */
-
-	if (tcgetattr(0, &stermios) < 0)
-	{
-		DEBUG(3,
-		      ("could not read default terminal attributes on pty\n"));
-		return (False);
-	}
-	stermios.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
-	stermios.c_lflag |= ICANON;
-#ifdef ONLCR
- 	stermios.c_oflag &= ~(ONLCR);
-#endif
-	if (tcsetattr(0, TCSANOW, &stermios) < 0)
-	{
-		DEBUG(3, ("could not set attributes of pty\n"));
-		return (False);
-	}
-
-	/* make us completely into the right uid */
-	if (!as_root)
-	{
-		become_user_permanently(uid, gid);
-	}
-
-	DEBUG(10,
-	      ("Invoking '%s' as password change program.\n",
-	       passwordprogram));
-
-	/* execl() password-change application */
-	if (execle("/bin/sh", "sh", "-c", passwordprogram, NULL, eptrs) < 0)
-	{
-		DEBUG(3, ("Bad status returned from %s\n", passwordprogram));
-		return (False);
-	}
-	return (True);
-}
-
-static int expect(int master, char *issue, char *expected)
-{
-	char buffer[1024];
-	int attempts, timeout, nread;
-	size_t len;
-	bool match = False;
-
-	for (attempts = 0; attempts < 2; attempts++) {
-		NTSTATUS status;
-		if (!strequal(issue, ".")) {
-			if (lp_passwd_chat_debug())
-				DEBUG(100, ("expect: sending [%s]\n", issue));
-
-			if ((len = sys_write(master, issue, strlen(issue))) != strlen(issue)) {
-				DEBUG(2,("expect: (short) write returned %d\n",
-					 (int)len ));
-				return False;
-			}
-		}
-
-		if (strequal(expected, "."))
-			return True;
-
-		/* Initial timeout. */
-		timeout = lp_passwd_chat_timeout() * 1000;
-		nread = 0;
-		buffer[nread] = 0;
-
-		while (True) {
-			status = read_fd_with_timeout(
-				master, buffer + nread, 1,
-				sizeof(buffer) - nread - 1,
-				timeout, &len);
-
-			if (!NT_STATUS_IS_OK(status)) {
-				break;
-			}
-			nread += len;
-			buffer[nread] = 0;
-
-			{
-				/* Eat leading/trailing whitespace before match. */
-				char *str = SMB_STRDUP(buffer);
-				if (!str) {
-					DEBUG(2,("expect: ENOMEM\n"));
-					return False;
-				}
-				trim_char(str, ' ', ' ');
-
-				if ((match = unix_wild_match(expected, str)) == True) {
-					/* Now data has started to return, lower timeout. */
-					timeout = lp_passwd_chat_timeout() * 100;
-				}
-				SAFE_FREE(str);
-			}
-		}
-
-		if (lp_passwd_chat_debug())
-			DEBUG(100, ("expect: expected [%s] received [%s] match %s\n",
-				    expected, buffer, match ? "yes" : "no" ));
-
-		if (match)
-			break;
-
-		if (!NT_STATUS_IS_OK(status)) {
-			DEBUG(2, ("expect: %s\n", nt_errstr(status)));
-			return False;
-		}
-	}
-
-	DEBUG(10,("expect: returning %s\n", match ? "True" : "False" ));
-	return match;
-}
-
-static void pwd_sub(char *buf)
-{
-	all_string_sub(buf, "\\n", "\n", 0);
-	all_string_sub(buf, "\\r", "\r", 0);
-	all_string_sub(buf, "\\s", " ", 0);
-	all_string_sub(buf, "\\t", "\t", 0);
-}
-
-static int talktochild(int master, const char *seq)
-{
-	TALLOC_CTX *frame = talloc_stackframe();
-	int count = 0;
-	char *issue;
-	char *expected;
-
-	issue = talloc_strdup(frame, ".");
-	if (!issue) {
-		TALLOC_FREE(frame);
-		return false;
-	}
-
-	while (next_token_talloc(frame, &seq, &expected, NULL)) {
-		pwd_sub(expected);
-		count++;
-
-		if (!expect(master, issue, expected)) {
-			DEBUG(3, ("Response %d incorrect\n", count));
-			TALLOC_FREE(frame);
-			return false;
-		}
-
-		if (!next_token_talloc(frame, &seq, &issue, NULL)) {
-			issue = talloc_strdup(frame, ".");
-			if (!issue) {
-				TALLOC_FREE(frame);
-				return false;
-			}
-		}
-		pwd_sub(issue);
-	}
-
-	if (!strequal(issue, ".")) {
-		/* we have one final issue to send */
-		expected = talloc_strdup(frame, ".");
-		if (!expected) {
-			TALLOC_FREE(frame);
-			return false;
-		}
-		if (!expect(master, issue, expected)) {
-			TALLOC_FREE(frame);
-			return False;
-		}
-	}
-	TALLOC_FREE(frame);
-	return (count > 0);
-}
-
-static bool chat_with_program(char *passwordprogram, const struct passwd *pass,
-			      char *chatsequence, bool as_root)
-{
-	char *slavedev = NULL;
-	int master;
-	pid_t pid, wpid;
-	int wstat;
-	bool chstat = False;
-
-	if (pass == NULL) {
-		DEBUG(0, ("chat_with_program: user doesn't exist in the UNIX password database.\n"));
-		return False;
-	}
-
-	/* allocate a pseudo-terminal device */
-	if ((master = findpty(&slavedev)) < 0) {
-		DEBUG(3, ("chat_with_program: Cannot Allocate pty for password change: %s\n", pass->pw_name));
-		return (False);
-	}
-
-	/*
-	 * We need to temporarily stop CatchChild from eating
-	 * SIGCLD signals as it also eats the exit status code. JRA.
-	 */
-
-	CatchChildLeaveStatus();
-
-	if ((pid = sys_fork()) < 0) {
-		DEBUG(3, ("chat_with_program: Cannot fork() child for password change: %s\n", pass->pw_name));
-		SAFE_FREE(slavedev);
-		close(master);
-		CatchChild();
-		return (False);
-	}
-
-	/* we now have a pty */
-	if (pid > 0) {			/* This is the parent process */
-		/* Don't need this anymore in parent. */
-		SAFE_FREE(slavedev);
-
-		if ((chstat = talktochild(master, chatsequence)) == False) {
-			DEBUG(3, ("chat_with_program: Child failed to change password: %s\n", pass->pw_name));
-			kill(pid, SIGKILL);	/* be sure to end this process */
-		}
-
-		while ((wpid = sys_waitpid(pid, &wstat, 0)) < 0) {
-			if (errno == EINTR) {
-				errno = 0;
-				continue;
-			}
-			break;
-		}
-
-		if (wpid < 0) {
-			DEBUG(3, ("chat_with_program: The process is no longer waiting!\n\n"));
-			close(master);
-			CatchChild();
-			return (False);
-		}
-
-		/*
-		 * Go back to ignoring children.
-		 */
-		CatchChild();
-
-		close(master);
-
-		if (pid != wpid) {
-			DEBUG(3, ("chat_with_program: We were waiting for the wrong process ID\n"));
-			return (False);
-		}
-		if (WIFEXITED(wstat) && (WEXITSTATUS(wstat) != 0)) {
-			DEBUG(3, ("chat_with_program: The process exited with status %d \
-while we were waiting\n", WEXITSTATUS(wstat)));
-			return (False);
-		}
-#if defined(WIFSIGNALLED) && defined(WTERMSIG)
-		else if (WIFSIGNALLED(wstat)) {
-                        DEBUG(3, ("chat_with_program: The process was killed by signal %d \
-while we were waiting\n", WTERMSIG(wstat)));
-			return (False);
-		}
-#endif
-	} else {
-		/* CHILD */
-
-		/*
-		 * Lose any elevated privileges.
-		 */
-		drop_effective_capability(KERNEL_OPLOCK_CAPABILITY);
-		drop_effective_capability(DMAPI_ACCESS_CAPABILITY);
-
-		/* make sure it doesn't freeze */
-		alarm(20);
-
-		if (as_root)
-			become_root();
-
-		DEBUG(3, ("chat_with_program: Dochild for user %s (uid=%d,gid=%d) (as_root = %s)\n", pass->pw_name,
-		       (int)getuid(), (int)getgid(), BOOLSTR(as_root) ));
-		chstat = dochild(master, slavedev, pass, passwordprogram, as_root);
-
-		if (as_root)
-			unbecome_root();
-
-		/*
-		 * The child should never return from dochild() ....
-		 */
-
-		DEBUG(0, ("chat_with_program: Error: dochild() returned %d\n", chstat));
-		exit(1);
-	}
-
-	if (chstat)
-		DEBUG(3, ("chat_with_program: Password change %ssuccessful for user %s\n",
-		       (chstat ? "" : "un"), pass->pw_name));
-	return (chstat);
-}
-
-bool chgpasswd(const char *name, const struct passwd *pass,
-	       const char *oldpass, const char *newpass, bool as_root)
-{
-	char *passwordprogram = NULL;
-	char *chatsequence = NULL;
-	size_t i;
-	size_t len;
-	TALLOC_CTX *ctx = talloc_tos();
-
-	if (!oldpass) {
-		oldpass = "";
-	}
-
-	DEBUG(3, ("chgpasswd: Password change (as_root=%s) for user: %s\n", BOOLSTR(as_root), name));
-
-#ifdef DEBUG_PASSWORD
-	DEBUG(100, ("chgpasswd: Passwords: old=%s new=%s\n", oldpass, newpass));
-#endif
-
-	/* Take the passed information and test it for minimum criteria */
-
-	/* Password is same as old password */
-	if (strcmp(oldpass, newpass) == 0) {
-		/* don't allow same password */
-		DEBUG(2, ("chgpasswd: Password Change: %s, New password is same as old\n", name));	/* log the attempt */
-		return (False);	/* inform the user */
-	}
-
-	/*
-	 * Check the old and new passwords don't contain any control
-	 * characters.
-	 */
-
-	len = strlen(oldpass);
-	for (i = 0; i < len; i++) {
-		if (iscntrl((int)oldpass[i])) {
-			DEBUG(0, ("chgpasswd: oldpass contains control characters (disallowed).\n"));
-			return False;
-		}
-	}
-
-	len = strlen(newpass);
-	for (i = 0; i < len; i++) {
-		if (iscntrl((int)newpass[i])) {
-			DEBUG(0, ("chgpasswd: newpass contains control characters (disallowed).\n"));
-			return False;
-		}
-	}
-
-#ifdef WITH_PAM
-	if (lp_pam_password_change()) {
-		bool ret;
-#ifdef HAVE_SETLOCALE
-		const char *prevlocale = setlocale(LC_ALL, "C");
-#endif
-
-		if (as_root)
-			become_root();
-
-		if (pass) {
-			ret = smb_pam_passchange(pass->pw_name, oldpass, newpass);
-		} else {
-			ret = smb_pam_passchange(name, oldpass, newpass);
-		}
-
-		if (as_root)
-			unbecome_root();
-
-#ifdef HAVE_SETLOCALE
-		setlocale(LC_ALL, prevlocale);
-#endif
-
-		return ret;
-	}
-#endif
-
-	/* A non-PAM password change just doen't make sense without a valid local user */
-
-	if (pass == NULL) {
-		DEBUG(0, ("chgpasswd: user %s doesn't exist in the UNIX password database.\n", name));
-		return false;
-	}
-
-	passwordprogram = talloc_strdup(ctx, lp_passwd_program());
-	if (!passwordprogram || !*passwordprogram) {
-		DEBUG(2, ("chgpasswd: Null password program - no password changing\n"));
-		return false;
-	}
-	chatsequence = talloc_strdup(ctx, lp_passwd_chat());
-	if (!chatsequence || !*chatsequence) {
-		DEBUG(2, ("chgpasswd: Null chat sequence - no password changing\n"));
-		return false;
-	}
-
-	if (as_root) {
-		/* The password program *must* contain the user name to work. Fail if not. */
-		if (strstr_m(passwordprogram, "%u") == NULL) {
-			DEBUG(0,("chgpasswd: Running as root the 'passwd program' parameter *MUST* contain \
-the string %%u, and the given string %s does not.\n", passwordprogram ));
-			return false;
-		}
-	}
-
-	passwordprogram = talloc_string_sub(ctx, passwordprogram, "%u", name);
-	if (!passwordprogram) {
-		return false;
-	}
-
-	/* note that we do NOT substitute the %o and %n in the password program
-	   as this would open up a security hole where the user could use
-	   a new password containing shell escape characters */
-
-	chatsequence = talloc_string_sub(ctx, chatsequence, "%u", name);
-	if (!chatsequence) {
-		return false;
-	}
-	chatsequence = talloc_all_string_sub(ctx,
-					chatsequence,
-					"%o",
-					oldpass);
-	if (!chatsequence) {
-		return false;
-	}
-	chatsequence = talloc_all_string_sub(ctx,
-					chatsequence,
-					"%n",
-					newpass);
-	return chat_with_program(passwordprogram,
-				pass,
-				chatsequence,
-				as_root);
-}
-
-#else /* ALLOW_CHANGE_PASSWORD */
-
-bool chgpasswd(const char *name, const struct passwd *pass, 
-	       const char *oldpass, const char *newpass, bool as_root)
-{
-	DEBUG(0, ("chgpasswd: Unix Password changing not compiled in (user=%s)\n", name));
-	return (False);
-}
-#endif /* ALLOW_CHANGE_PASSWORD */
-
-/***********************************************************
- Decrypt and verify a user password change.
-
- The 516 byte long buffers are encrypted with the old NT and
- old LM passwords, and if the NT passwords are present, both
- buffers contain a unicode string.
-
- After decrypting the buffers, check the password is correct by
- matching the old hashed passwords with the passwords in the passdb.
-
-************************************************************/
-
-static NTSTATUS check_oem_password(const char *user,
-				   uchar password_encrypted_with_lm_hash[516],
-				   const uchar old_lm_hash_encrypted[16],
-				   uchar password_encrypted_with_nt_hash[516],
-				   const uchar old_nt_hash_encrypted[16],
-				   struct samu *sampass,
-				   char **pp_new_passwd)
-{
-	uchar null_pw[16];
-	uchar null_ntpw[16];
-	uint8 *password_encrypted;
-	const uint8 *encryption_key;
-	const uint8 *lanman_pw, *nt_pw;
-	uint32 acct_ctrl;
-	size_t new_pw_len;
-	uchar new_nt_hash[16];
-	uchar new_lm_hash[16];
-	uchar verifier[16];
-	char no_pw[2];
-
-	bool nt_pass_set = (password_encrypted_with_nt_hash && old_nt_hash_encrypted);
-	bool lm_pass_set = (password_encrypted_with_lm_hash && old_lm_hash_encrypted);
-
-	acct_ctrl = pdb_get_acct_ctrl(sampass);
-#if 0
-	/* I am convinced this check here is wrong, it is valid to
-	 * change a password of a user that has a disabled account - gd */
-
-	if (acct_ctrl & ACB_DISABLED) {
-		DEBUG(2,("check_lanman_password: account %s disabled.\n", user));
-		return NT_STATUS_ACCOUNT_DISABLED;
-	}
-#endif
-	if ((acct_ctrl & ACB_PWNOTREQ) && lp_null_passwords()) {
-		/* construct a null password (in case one is needed */
-		no_pw[0] = 0;
-		no_pw[1] = 0;
-		nt_lm_owf_gen(no_pw, null_ntpw, null_pw);
-		lanman_pw = null_pw;
-		nt_pw = null_pw;
-
-	} else {
-		/* save pointers to passwords so we don't have to keep looking them up */
-		if (lp_lanman_auth()) {
-			lanman_pw = pdb_get_lanman_passwd(sampass);
-		} else {
-			lanman_pw = NULL;
-		}
-		nt_pw = pdb_get_nt_passwd(sampass);
-	}
-
-	if (nt_pw && nt_pass_set) {
-		/* IDEAL Case: passwords are in unicode, and we can
-		 * read use the password encrypted with the NT hash
-		 */
-		password_encrypted = password_encrypted_with_nt_hash;
-		encryption_key = nt_pw;
-	} else if (lanman_pw && lm_pass_set) {
-		/* password may still be in unicode, but use LM hash version */
-		password_encrypted = password_encrypted_with_lm_hash;
-		encryption_key = lanman_pw;
-	} else if (nt_pass_set) {
-		DEBUG(1, ("NT password change supplied for user %s, but we have no NT password to check it with\n", 
-			  user));
-		return NT_STATUS_WRONG_PASSWORD;
-	} else if (lm_pass_set) {
-		if (lp_lanman_auth()) {
-			DEBUG(1, ("LM password change supplied for user %s, but we have no LanMan password to check it with\n", 
-				  user));
-		} else {
-			DEBUG(1, ("LM password change supplied for user %s, but we have disabled LanMan authentication\n", 
-				  user));
-		}
-		return NT_STATUS_WRONG_PASSWORD;
-	} else {
-		DEBUG(1, ("password change requested for user %s, but no password supplied!\n", 
-			  user));
-		return NT_STATUS_WRONG_PASSWORD;
-	}
-
-	/*
-	 * Decrypt the password with the key
-	 */
-	arcfour_crypt( password_encrypted, encryption_key, 516);
-
-	if (!decode_pw_buffer(talloc_tos(),
-				password_encrypted,
-				pp_new_passwd,
-				&new_pw_len,
-				nt_pass_set ? CH_UTF16 : CH_DOS)) {
-		return NT_STATUS_WRONG_PASSWORD;
-	}
-
-	/*
-	 * To ensure we got the correct new password, hash it and
-	 * use it as a key to test the passed old password.
-	 */
-
-	if (nt_pass_set) {
-		/* NT passwords, verify the NT hash. */
-
-		/* Calculate the MD4 hash (NT compatible) of the password */
-		memset(new_nt_hash, '\0', 16);
-		E_md4hash(*pp_new_passwd, new_nt_hash);
-
-		if (nt_pw) {
-			/*
-			 * check the NT verifier
-			 */
-			E_old_pw_hash(new_nt_hash, nt_pw, verifier);
-			if (memcmp(verifier, old_nt_hash_encrypted, 16)) {
-				DEBUG(0, ("check_oem_password: old nt "
-					  "password doesn't match.\n"));
-				return NT_STATUS_WRONG_PASSWORD;
-			}
-
-			/* We could check the LM password here, but there is
-			 * little point, we already know the password is
-			 * correct, and the LM password might not even be
-			 * present. */
-
-			/* Further, LM hash generation algorithms
-			 * differ with charset, so we could
-			 * incorrectly fail a perfectly valid password
-			 * change */
-#ifdef DEBUG_PASSWORD
-			DEBUG(100,
-			      ("check_oem_password: password %s ok\n", *pp_new_passwd));
-#endif
-			return NT_STATUS_OK;
-		}
-
-		if (lanman_pw) {
-			/*
-			 * check the lm verifier
-			 */
-			E_old_pw_hash(new_nt_hash, lanman_pw, verifier);
-			if (memcmp(verifier, old_lm_hash_encrypted, 16)) {
-				DEBUG(0,("check_oem_password: old lm password doesn't match.\n"));
-				return NT_STATUS_WRONG_PASSWORD;
-			}
-#ifdef DEBUG_PASSWORD
-			DEBUG(100,
-			      ("check_oem_password: password %s ok\n", *pp_new_passwd));
-#endif
-			return NT_STATUS_OK;
-		}
-	}
-
-	if (lanman_pw && lm_pass_set) {
-
-		E_deshash(*pp_new_passwd, new_lm_hash);
-
-		/*
-		 * check the lm verifier
-		 */
-		E_old_pw_hash(new_lm_hash, lanman_pw, verifier);
-		if (memcmp(verifier, old_lm_hash_encrypted, 16)) {
-			DEBUG(0,("check_oem_password: old lm password doesn't match.\n"));
-			return NT_STATUS_WRONG_PASSWORD;
-		}
-
-#ifdef DEBUG_PASSWORD
-		DEBUG(100,
-		      ("check_oem_password: password %s ok\n", *pp_new_passwd));
-#endif
-		return NT_STATUS_OK;
-	}
-
-	/* should not be reached */
-	return NT_STATUS_WRONG_PASSWORD;
-}
-
-static bool password_in_history(uint8_t nt_pw[NT_HASH_LEN],
-				uint32_t pw_history_len,
-				const uint8_t *pw_history)
-{
-	static const uint8_t zero_md5_nt_pw[SALTED_MD5_HASH_LEN] = { 0, };
-	int i;
-
-	dump_data(100, nt_pw, NT_HASH_LEN);
-	dump_data(100, pw_history, PW_HISTORY_ENTRY_LEN * pw_history_len);
-
-	for (i=0; i<pw_history_len; i++) {
-		uint8_t new_nt_pw_salted_md5_hash[SALTED_MD5_HASH_LEN];
-		const uint8_t *current_salt;
-		const uint8_t *old_nt_pw_salted_md5_hash;
-
-		current_salt = &pw_history[i*PW_HISTORY_ENTRY_LEN];
-		old_nt_pw_salted_md5_hash = current_salt + PW_HISTORY_SALT_LEN;
-
-		if (memcmp(zero_md5_nt_pw, old_nt_pw_salted_md5_hash,
-			   SALTED_MD5_HASH_LEN) == 0) {
-			/* Ignore zero valued entries. */
-			continue;
-		}
-
-		if (memcmp(zero_md5_nt_pw, current_salt,
-			   PW_HISTORY_SALT_LEN) == 0)
-		{
-			/*
-			 * New format: zero salt and then plain nt hash.
-			 * Directly compare the hashes.
-			 */
-			if (memcmp(nt_pw, old_nt_pw_salted_md5_hash,
-				   SALTED_MD5_HASH_LEN) == 0)
-			{
-				return true;
-			}
-		} else {
-			/*
-			 * Old format: md5sum of salted nt hash.
-			 * Create salted version of new pw to compare.
-			 */
-			E_md5hash(current_salt, nt_pw, new_nt_pw_salted_md5_hash);
-
-			if (memcmp(new_nt_pw_salted_md5_hash,
-				   old_nt_pw_salted_md5_hash,
-				   SALTED_MD5_HASH_LEN) == 0) {
-				return true;
-			}
-		}
-	}
-	return false;
-}
-
-/***********************************************************
- This routine takes the given password and checks it against
- the password history. Returns True if this password has been
- found in the history list.
-************************************************************/
-
-static bool check_passwd_history(struct samu *sampass, const char *plaintext)
-{
-	uchar new_nt_p16[NT_HASH_LEN];
-	const uint8 *nt_pw;
-	const uint8 *pwhistory;
-	uint32 pwHisLen, curr_pwHisLen;
-
-	pdb_get_account_policy(PDB_POLICY_PASSWORD_HISTORY, &pwHisLen);
-	if (pwHisLen == 0) {
-		return False;
-	}
-
-	pwhistory = pdb_get_pw_history(sampass, &curr_pwHisLen);
-	if (!pwhistory || curr_pwHisLen == 0) {
-		return False;
-	}
-
-	/* Only examine the minimum of the current history len and
-	   the stored history len. Avoids race conditions. */
-	pwHisLen = MIN(pwHisLen,curr_pwHisLen);
-
-	nt_pw = pdb_get_nt_passwd(sampass);
-
-	E_md4hash(plaintext, new_nt_p16);
-
-	if (!memcmp(nt_pw, new_nt_p16, NT_HASH_LEN)) {
-		DEBUG(10,("check_passwd_history: proposed new password for user %s is the same as the current password !\n",
-			pdb_get_username(sampass) ));
-		return True;
-	}
-
-	if (password_in_history(new_nt_p16, pwHisLen, pwhistory)) {
-		DEBUG(1,("check_passwd_history: proposed new password for "
-			 "user %s found in history list !\n",
-			 pdb_get_username(sampass) ));
-		return true;
-	}
-	return false;
-}
-
-/***********************************************************
-************************************************************/
-
-NTSTATUS check_password_complexity(const char *username,
-				   const char *password,
-				   enum samPwdChangeReason *samr_reject_reason)
-{
-	TALLOC_CTX *tosctx = talloc_tos();
-	int check_ret;
-	char *cmd;
-
-	/* Use external script to check password complexity */
-	if ((lp_check_password_script() == NULL)
-	    || (*(lp_check_password_script()) == '\0')) {
-		return NT_STATUS_OK;
-	}
-
-	cmd = talloc_string_sub(tosctx, lp_check_password_script(), "%u",
-				username);
-	if (!cmd) {
-		return NT_STATUS_PASSWORD_RESTRICTION;
-	}
-
-	check_ret = smbrunsecret(cmd, password);
-	DEBUG(5,("check_password_complexity: check password script (%s) "
-		 "returned [%d]\n", cmd, check_ret));
-	TALLOC_FREE(cmd);
-
-	if (check_ret != 0) {
-		DEBUG(1,("check_password_complexity: "
-			 "check password script said new password is not good "
-			 "enough!\n"));
-		if (samr_reject_reason) {
-			*samr_reject_reason = SAM_PWD_CHANGE_NOT_COMPLEX;
-		}
-		return NT_STATUS_PASSWORD_RESTRICTION;
-	}
-
-	return NT_STATUS_OK;
-}
-
-/***********************************************************
- Code to change the oem password. Changes both the lanman
- and NT hashes.  Old_passwd is almost always NULL.
- NOTE this function is designed to be called as root. Check the old password
- is correct before calling. JRA.
-************************************************************/
-
-static NTSTATUS change_oem_password(struct samu *hnd, char *old_passwd, char *new_passwd, bool as_root, enum samPwdChangeReason *samr_reject_reason)
-{
-	uint32 min_len;
-	uint32 refuse;
-	TALLOC_CTX *tosctx = talloc_tos();
-	struct passwd *pass = NULL;
-	const char *username = pdb_get_username(hnd);
-	time_t can_change_time = pdb_get_pass_can_change_time(hnd);
-	NTSTATUS status;
-
-	if (samr_reject_reason) {
-		*samr_reject_reason = SAM_PWD_CHANGE_NO_ERROR;
-	}
-
-	/* check to see if the secdesc has previously been set to disallow */
-	if (!pdb_get_pass_can_change(hnd)) {
-		DEBUG(1, ("user %s does not have permissions to change password\n", username));
-		if (samr_reject_reason) {
-			*samr_reject_reason = SAM_PWD_CHANGE_NO_ERROR;
-		}
-		return NT_STATUS_ACCOUNT_RESTRICTION;
-	}
-
-	/* check to see if it is a Machine account and if the policy
-	 * denies machines to change the password. *
-	 * Should we deny also SRVTRUST and/or DOMSTRUST ? .SSS. */
-	if (pdb_get_acct_ctrl(hnd) & ACB_WSTRUST) {
-		if (pdb_get_account_policy(PDB_POLICY_REFUSE_MACHINE_PW_CHANGE, &refuse) && refuse) {
-			DEBUG(1, ("Machine %s cannot change password now, "
-				  "denied by Refuse Machine Password Change policy\n",
-				  username));
-			if (samr_reject_reason) {
-				*samr_reject_reason = SAM_PWD_CHANGE_NO_ERROR;
-			}
-			return NT_STATUS_ACCOUNT_RESTRICTION;
-		}
-	}
-
-	/* removed calculation here, because passdb now calculates
-	   based on policy.  jmcd */
-	if ((can_change_time != 0) && (time(NULL) < can_change_time)) {
-		DEBUG(1, ("user %s cannot change password now, must "
-			  "wait until %s\n", username,
-			  http_timestring(tosctx, can_change_time)));
-		if (samr_reject_reason) {
-			*samr_reject_reason = SAM_PWD_CHANGE_NO_ERROR;
-		}
-		return NT_STATUS_ACCOUNT_RESTRICTION;
-	}
-
-	if (pdb_get_account_policy(PDB_POLICY_MIN_PASSWORD_LEN, &min_len) && (str_charnum(new_passwd) < min_len)) {
-		DEBUG(1, ("user %s cannot change password - password too short\n", 
-			  username));
-		DEBUGADD(1, (" account policy min password len = %d\n", min_len));
-		if (samr_reject_reason) {
-			*samr_reject_reason = SAM_PWD_CHANGE_PASSWORD_TOO_SHORT;
-		}
-		return NT_STATUS_PASSWORD_RESTRICTION;
-/* 		return NT_STATUS_PWD_TOO_SHORT; */
-	}
-
-	if (check_passwd_history(hnd,new_passwd)) {
-		if (samr_reject_reason) {
-			*samr_reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
-		}
-		return NT_STATUS_PASSWORD_RESTRICTION;
-	}
-
-	pass = Get_Pwnam_alloc(tosctx, username);
-	if (!pass) {
-		DEBUG(1, ("change_oem_password: Username %s does not exist in system !?!\n", username));
-		return NT_STATUS_ACCESS_DENIED;
-	}
-
-	status = check_password_complexity(username, new_passwd, samr_reject_reason);
-	if (!NT_STATUS_IS_OK(status)) {
-		TALLOC_FREE(pass);
-		return status;
-	}
-
-	/*
-	 * If unix password sync was requested, attempt to change
-	 * the /etc/passwd database first. Return failure if this cannot
-	 * be done.
-	 *
-	 * This occurs before the oem change, because we don't want to
-	 * update it if chgpasswd failed.
-	 *
-	 * Conditional on lp_unix_password_sync() because we don't want
-	 * to touch the unix db unless we have admin permission.
-	 */
-
-	if(lp_unix_password_sync() &&
-		!chgpasswd(username, pass, old_passwd, new_passwd, as_root)) {
-		TALLOC_FREE(pass);
-		return NT_STATUS_ACCESS_DENIED;
-	}
-
-	TALLOC_FREE(pass);
-
-	if (!pdb_set_plaintext_passwd (hnd, new_passwd)) {
-		return NT_STATUS_ACCESS_DENIED;
-	}
-
-	/* Now write it into the file. */
-	return pdb_update_sam_account (hnd);
-}
-
-/***********************************************************
- Code to check and change the OEM hashed password.
-************************************************************/
-
-NTSTATUS pass_oem_change(char *user,
-			 uchar password_encrypted_with_lm_hash[516],
-			 const uchar old_lm_hash_encrypted[16],
-			 uchar password_encrypted_with_nt_hash[516],
-			 const uchar old_nt_hash_encrypted[16],
-			 enum samPwdChangeReason *reject_reason)
-{
-	char *new_passwd = NULL;
-	struct samu *sampass = NULL;
-	NTSTATUS nt_status;
-	bool ret = false;
-
-	if (!(sampass = samu_new(NULL))) {
-		return NT_STATUS_NO_MEMORY;
-	}
-
-	become_root();
-	ret = pdb_getsampwnam(sampass, user);
-	unbecome_root();
-
-	if (ret == false) {
-		DEBUG(0,("pass_oem_change: getsmbpwnam returned NULL\n"));
-		TALLOC_FREE(sampass);
-		return NT_STATUS_NO_SUCH_USER;
-	}
-
-	nt_status = check_oem_password(user,
-				       password_encrypted_with_lm_hash,
-				       old_lm_hash_encrypted,
-				       password_encrypted_with_nt_hash,
-				       old_nt_hash_encrypted,
-				       sampass,
-				       &new_passwd);
-
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		TALLOC_FREE(sampass);
-		return nt_status;
-	}
-
-	/* We've already checked the old password here.... */
-	become_root();
-	nt_status = change_oem_password(sampass, NULL, new_passwd, True, reject_reason);
-	unbecome_root();
-
-	memset(new_passwd, 0, strlen(new_passwd));
-
-	TALLOC_FREE(sampass);
-
-	return nt_status;
-}