s3: Move check_sam_security to auth/check_sam.c

3 files changed, 513 insertions, 486 deletions

diff --git a/source3/Makefile.in b/source3/Makefile.in
index 55f3d40f17..92a0b43316 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -755,7 +755,7 @@ DCUTIL_OBJ  = libsmb/namequery_dc.o libsmb/trustdom_cache.o libsmb/trusts_util.o
 
 AUTH_BUILTIN_OBJ = auth/auth_builtin.o
 AUTH_DOMAIN_OBJ = auth/auth_domain.o
-AUTH_SAM_OBJ = auth/auth_sam.o
+AUTH_SAM_OBJ = auth/auth_sam.o auth/check_samsec.o
 AUTH_SERVER_OBJ = auth/auth_server.o
 AUTH_UNIX_OBJ = auth/auth_unix.o
 AUTH_WINBIND_OBJ = auth/auth_winbind.o
diff --git a/source3/auth/auth_sam.c b/source3/auth/auth_sam.c
index 3cd580e4c7..4220b7afd5 100644
--- a/source3/auth/auth_sam.c
+++ b/source3/auth/auth_sam.c
@@ -26,491 +26,6 @@
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_AUTH
 
-/****************************************************************************
- Do a specific test for an smb password being correct, given a smb_password and
- the lanman and NT responses.
-****************************************************************************/
-
-static NTSTATUS sam_password_ok(TALLOC_CTX *mem_ctx,
-				const char *username,
-				uint32_t acct_ctrl,
-				const DATA_BLOB *challenge,
-				const uint8_t *lm_pw,
-				const uint8_t *nt_pw,
-				const struct auth_usersupplied_info *user_info,
-				DATA_BLOB *user_sess_key, 
-				DATA_BLOB *lm_sess_key)
-{
-	struct samr_Password _lm_hash, _nt_hash, _client_lm_hash, _client_nt_hash;
-	struct samr_Password *lm_hash = NULL;
-	struct samr_Password *nt_hash = NULL;
-	struct samr_Password *client_lm_hash = NULL;
-	struct samr_Password *client_nt_hash = NULL;
-
-	*user_sess_key = data_blob_null;
-	*lm_sess_key = data_blob_null;
-
-	if (acct_ctrl & ACB_PWNOTREQ) {
-		if (lp_null_passwords()) {
-			DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
-			return NT_STATUS_OK;
-		} else {
-			DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
-			return NT_STATUS_LOGON_FAILURE;
-		}		
-	}
-
-	if (lm_pw) {
-		memcpy(_lm_hash.hash, lm_pw, sizeof(_lm_hash.hash));
-		lm_hash = &_lm_hash;
-	}
-	if (nt_pw) {
-		memcpy(_nt_hash.hash, nt_pw, sizeof(_nt_hash.hash));
-		nt_hash = &_nt_hash;
-	}
-	if (user_info->lm_interactive_pwd.data && sizeof(_client_lm_hash.hash) == user_info->lm_interactive_pwd.length) {
-		memcpy(_client_lm_hash.hash, user_info->lm_interactive_pwd.data, sizeof(_lm_hash.hash));
-		client_lm_hash = &_client_lm_hash;
-	}
-	if (user_info->nt_interactive_pwd.data && sizeof(_client_nt_hash.hash) == user_info->nt_interactive_pwd.length) {
-		memcpy(_client_nt_hash.hash, user_info->nt_interactive_pwd.data, sizeof(_nt_hash.hash));
-		client_nt_hash = &_client_nt_hash;
-	}
-
-	if (client_lm_hash || client_nt_hash) {
-		*user_sess_key = data_blob_talloc(mem_ctx, NULL, 16);
-		if (!user_sess_key->data) {
-			return NT_STATUS_NO_MEMORY;
-		}
-		SMBsesskeygen_ntv1(nt_pw, user_sess_key->data);
-		return hash_password_check(mem_ctx, lp_lanman_auth(),
-					   client_lm_hash,
-					   client_nt_hash,
-					   username, 
-					   lm_hash,
-					   nt_hash);
-	} else {
-		return ntlm_password_check(mem_ctx, lp_lanman_auth(),
-					   lp_ntlm_auth(),
-					   user_info->logon_parameters,
-					   challenge,
-					   &user_info->lm_resp, &user_info->nt_resp, 
-					   username, 
-					   user_info->smb_name,
-					   user_info->client_domain,
-					   lm_hash,
-					   nt_hash,
-					   user_sess_key, lm_sess_key);
-	}
-}
-
-/****************************************************************************
- Check if a user is allowed to logon at this time. Note this is the
- servers local time, as logon hours are just specified as a weekly
- bitmask.
-****************************************************************************/
-
-static bool logon_hours_ok(struct samu *sampass)
-{
-	/* In logon hours first bit is Sunday from 12AM to 1AM */
-	const uint8 *hours;
-	struct tm *utctime;
-	time_t lasttime;
-	const char *asct;
-	uint8 bitmask, bitpos;
-
-	hours = pdb_get_hours(sampass);
-	if (!hours) {
-		DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));
-		return True;
-	}
-
-	lasttime = time(NULL);
-	utctime = gmtime(&lasttime);
-	if (!utctime) {
-		DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
-			pdb_get_username(sampass) ));
-		return False;
-	}
-
-	/* find the corresponding byte and bit */
-	bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
-	bitmask = 1 << (bitpos % 8);
-
-	if (! (hours[bitpos/8] & bitmask)) {
-		struct tm *t = localtime(&lasttime);
-		if (!t) {
-			asct = "INVALID TIME";
-		} else {
-			asct = asctime(t);
-			if (!asct) {
-				asct = "INVALID TIME";
-			}
-		}
-
-		DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
-			  "logon at this time (%s).\n",
-			  pdb_get_username(sampass), asct ));
-		return False;
-	}
-
-	asct = asctime(utctime);
-	DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
-		pdb_get_username(sampass), asct ? asct : "UNKNOWN TIME" ));
-
-	return True;
-}
-
-/****************************************************************************
- Do a specific test for a struct samu being valid for this connection
- (ie not disabled, expired and the like).
-****************************************************************************/
-
-static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
-			       struct samu *sampass, 
-			       const struct auth_usersupplied_info *user_info)
-{
-	uint32	acct_ctrl = pdb_get_acct_ctrl(sampass);
-	char *workstation_list;
-	time_t kickoff_time;
-
-	DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
-
-	/* Quit if the account was disabled. */
-	if (acct_ctrl & ACB_DISABLED) {
-		DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
-		return NT_STATUS_ACCOUNT_DISABLED;
-	}
-
-	/* Quit if the account was locked out. */
-	if (acct_ctrl & ACB_AUTOLOCK) {
-		DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
-		return NT_STATUS_ACCOUNT_LOCKED_OUT;
-	}
-
-	/* Quit if the account is not allowed to logon at this time. */
-	if (! logon_hours_ok(sampass)) {
-		return NT_STATUS_INVALID_LOGON_HOURS;
-	}
-
-	/* Test account expire time */
-
-	kickoff_time = pdb_get_kickoff_time(sampass);
-	if (kickoff_time != 0 && time(NULL) > kickoff_time) {
-		DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
-		DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
-		return NT_STATUS_ACCOUNT_EXPIRED;
-	}
-
-	if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP) && !(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)) {
-		time_t must_change_time = pdb_get_pass_must_change_time(sampass);
-		time_t last_set_time = pdb_get_pass_last_set_time(sampass);
-
-		/* check for immediate expiry "must change at next logon" 
-		 * for a user account. */
-		if (((acct_ctrl & (ACB_WSTRUST|ACB_SVRTRUST)) == 0) && (last_set_time == 0)) {
-			DEBUG(1,("sam_account_ok: Account for user '%s' password must change!\n", pdb_get_username(sampass)));
-			return NT_STATUS_PASSWORD_MUST_CHANGE;
-		}
-
-		/* check for expired password */
-		if (must_change_time < time(NULL) && must_change_time != 0) {
-			DEBUG(1,("sam_account_ok: Account for user '%s' password expired!\n", pdb_get_username(sampass)));
-			DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(talloc_tos(), must_change_time), (long)must_change_time));
-			return NT_STATUS_PASSWORD_EXPIRED;
-		}
-	}
-
-	/* Test workstation. Workstation list is comma separated. */
-
-	workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
-	if (!workstation_list)
-		return NT_STATUS_NO_MEMORY;
-
-	if (*workstation_list) {
-		bool invalid_ws = True;
-		char *tok = NULL;
-		const char *s = workstation_list;
-		char *machine_name = talloc_asprintf(mem_ctx, "%s$", user_info->wksta_name);
-
-		if (machine_name == NULL)
-			return NT_STATUS_NO_MEMORY;
-
-		while (next_token_talloc(mem_ctx, &s, &tok, ",")) {
-			DEBUG(10,("sam_account_ok: checking for workstation match %s and %s\n",
-				  tok, user_info->wksta_name));
-			if(strequal(tok, user_info->wksta_name)) {
-				invalid_ws = False;
-				break;
-			}
-			if (tok[0] == '+') {
-				DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n", 
-					machine_name, tok + 1));
-				if (user_in_group(machine_name, tok + 1)) {
-					invalid_ws = False;
-					break;
-				}
-			}
-			TALLOC_FREE(tok);
-		}
-		TALLOC_FREE(tok);
-		TALLOC_FREE(machine_name);
-
-		if (invalid_ws)
-			return NT_STATUS_INVALID_WORKSTATION;
-	}
-
-	if (acct_ctrl & ACB_DOMTRUST) {
-		DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
-		return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
-	}
-
-	if (acct_ctrl & ACB_SVRTRUST) {
-		if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
-			DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
-			return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
-		}
-	}
-
-	if (acct_ctrl & ACB_WSTRUST) {
-		if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
-			DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
-			return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
-		}
-	}
-	return NT_STATUS_OK;
-}
-
-/**
- * Check whether the given password is one of the last two
- * password history entries. If so, the bad pwcount should
- * not be incremented even thought the actual password check
- * failed.
- */
-static bool need_to_increment_bad_pw_count(
-	const DATA_BLOB *challenge,
-	struct samu* sampass,
-	const struct auth_usersupplied_info *user_info)
-{
-	uint8_t i;
-	const uint8_t *pwhistory;
-	uint32_t pwhistory_len;
-	uint32_t policy_pwhistory_len;
-	uint32_t acct_ctrl;
-	const char *username;
-	TALLOC_CTX *mem_ctx = talloc_stackframe();
-	bool result = true;
-
-	pdb_get_account_policy(PDB_POLICY_PASSWORD_HISTORY,
-			       &policy_pwhistory_len);
-	if (policy_pwhistory_len == 0) {
-		goto done;
-	}
-
-	pwhistory = pdb_get_pw_history(sampass, &pwhistory_len);
-	if (!pwhistory || pwhistory_len == 0) {
-		goto done;
-	}
-
-	acct_ctrl = pdb_get_acct_ctrl(sampass);
-	username = pdb_get_username(sampass);
-
-	for (i=1; i < MIN(MIN(3, policy_pwhistory_len), pwhistory_len); i++) {
-		static const uint8_t zero16[SALTED_MD5_HASH_LEN];
-		const uint8_t *salt;
-		const uint8_t *nt_pw;
-		NTSTATUS status;
-		DATA_BLOB user_sess_key = data_blob_null;
-		DATA_BLOB lm_sess_key = data_blob_null;
-
-		salt = &pwhistory[i*PW_HISTORY_ENTRY_LEN];
-		nt_pw = salt + PW_HISTORY_SALT_LEN;
-
-		if (memcmp(zero16, nt_pw, NT_HASH_LEN) == 0) {
-			/* skip zero password hash */
-			continue;
-		}
-
-		if (memcmp(zero16, salt, PW_HISTORY_SALT_LEN) != 0) {
-			/* skip nonzero salt (old format entry) */
-			continue;
-		}
-
-		status = sam_password_ok(mem_ctx,
-					 username, acct_ctrl,
-					 challenge,
-					 NULL, nt_pw,
-					 user_info, &user_sess_key, &lm_sess_key);
-		if (NT_STATUS_IS_OK(status)) {
-			result = false;
-			break;
-		}
-	}
-
-done:
-	TALLOC_FREE(mem_ctx);
-	return result;
-}
-
-/****************************************************************************
-check if a username/password is OK assuming the password is a 24 byte
-SMB hash supplied in the user_info structure
-return an NT_STATUS constant.
-****************************************************************************/
-
-NTSTATUS check_sam_security(const DATA_BLOB *challenge,
-			    TALLOC_CTX *mem_ctx,
-			    const struct auth_usersupplied_info *user_info,
-			    struct auth_serversupplied_info **server_info)
-{
-	struct samu *sampass=NULL;
-	bool ret;
-	NTSTATUS nt_status;
-	NTSTATUS update_login_attempts_status;
-	DATA_BLOB user_sess_key = data_blob_null;
-	DATA_BLOB lm_sess_key = data_blob_null;
-	bool updated_autolock = False, updated_badpw = False;
-	const char *username;
-	const uint8_t *nt_pw;
-	const uint8_t *lm_pw;
-
-	/* the returned struct gets kept on the server_info, by means
-	   of a steal further down */
-
-	sampass = samu_new(mem_ctx);
-	if (sampass == NULL) {
-		return NT_STATUS_NO_MEMORY;
-	}
-
-	/* get the account information */
-
-	become_root();
-	ret = pdb_getsampwnam(sampass, user_info->internal_username);
-	unbecome_root();
-
-	if (ret == False) {
-		DEBUG(3,("check_sam_security: Couldn't find user '%s' in "
-			 "passdb.\n", user_info->internal_username));
-		TALLOC_FREE(sampass);
-		return NT_STATUS_NO_SUCH_USER;
-	}
-
-	username = pdb_get_username(sampass);
-	nt_pw = pdb_get_nt_passwd(sampass);
-	lm_pw = pdb_get_lanman_passwd(sampass);
-
-	/* see if autolock flag needs to be updated */
-	if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL)
-		pdb_update_autolock_flag(sampass, &updated_autolock);
-	/* Quit if the account was locked out. */
-	if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
-		DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", username));
-		return NT_STATUS_ACCOUNT_LOCKED_OUT;
-	}
-
-	nt_status = sam_password_ok(mem_ctx,
-				    username, pdb_get_acct_ctrl(sampass),
-				    challenge, lm_pw, nt_pw,
-				    user_info, &user_sess_key, &lm_sess_key);
-
-	/* Notify passdb backend of login success/failure. If not 
-	   NT_STATUS_OK the backend doesn't like the login */
-
-	update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status));
-
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		bool increment_bad_pw_count = false;
-
-		if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) && 
-		    pdb_get_acct_ctrl(sampass) & ACB_NORMAL &&
-		    NT_STATUS_IS_OK(update_login_attempts_status)) 
-		{
-			increment_bad_pw_count =
-				need_to_increment_bad_pw_count(
-					challenge, sampass, user_info);
-		}
-
-		if (increment_bad_pw_count) {
-			pdb_increment_bad_password_count(sampass);
-			updated_badpw = True;
-		} else {
-			pdb_update_bad_password_count(sampass, 
-						      &updated_badpw);
-		}
-		if (updated_autolock || updated_badpw){
-			NTSTATUS status;
-
-			become_root();
-			status = pdb_update_sam_account(sampass);
-			unbecome_root();
-
-			if (!NT_STATUS_IS_OK(status)) {
-				DEBUG(1, ("Failed to modify entry: %s\n",
-					  nt_errstr(status)));
-			}
-		}
-		goto done;
-	}
-
-	if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) &&
-	    (pdb_get_bad_password_count(sampass) > 0)){
-		pdb_set_bad_password_count(sampass, 0, PDB_CHANGED);
-		pdb_set_bad_password_time(sampass, 0, PDB_CHANGED);
-		updated_badpw = True;
-	}
-
-	if (updated_autolock || updated_badpw){
-		NTSTATUS status;
-
-		become_root();
-		status = pdb_update_sam_account(sampass);
-		unbecome_root();
-
-		if (!NT_STATUS_IS_OK(status)) {
-			DEBUG(1, ("Failed to modify entry: %s\n",
-				  nt_errstr(status)));
-		}
-	}
-
-	nt_status = sam_account_ok(mem_ctx, sampass, user_info);
-
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		goto done;
-	}
-
-	become_root();
-	nt_status = make_server_info_sam(server_info, sampass);
-	unbecome_root();
-	/*
-	 * sampass has been stolen to server_info.
-	 * So NULL it out to prevent segfaults.
-	 */
-	sampass = NULL;
-
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
-		goto done;
-	}
-
-	(*server_info)->user_session_key =
-		data_blob_talloc(*server_info, user_sess_key.data,
-				 user_sess_key.length);
-	data_blob_free(&user_sess_key);
-
-	(*server_info)->lm_session_key =
-		data_blob_talloc(*server_info, lm_sess_key.data,
-				 lm_sess_key.length);
-	data_blob_free(&lm_sess_key);
-
-	(*server_info)->nss_token |= user_info->was_mapped;
-
-done:
-	TALLOC_FREE(sampass);
-	data_blob_free(&user_sess_key);
-	data_blob_free(&lm_sess_key);
-	return nt_status;
-}
-
 static NTSTATUS auth_sam_ignoredomain_auth(const struct auth_context *auth_context,
 					   void *my_private_data,
 					   TALLOC_CTX *mem_ctx,
diff --git a/source3/auth/check_samsec.c b/source3/auth/check_samsec.c
new file mode 100644
index 0000000000..bd8cb4bb64
--- /dev/null
+++ b/source3/auth/check_samsec.c
@@ -0,0 +1,512 @@
+/*
+   Unix SMB/CIFS implementation.
+   Password and authentication handling
+   Copyright (C) Andrew Tridgell              1992-2000
+   Copyright (C) Luke Kenneth Casson Leighton 1996-2000
+   Copyright (C) Andrew Bartlett              2001-2003
+   Copyright (C) Gerald Carter                2003
+
+   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 "../libcli/auth/libcli_auth.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/****************************************************************************
+ Do a specific test for an smb password being correct, given a smb_password and
+ the lanman and NT responses.
+****************************************************************************/
+
+static NTSTATUS sam_password_ok(TALLOC_CTX *mem_ctx,
+				const char *username,
+				uint32_t acct_ctrl,
+				const DATA_BLOB *challenge,
+				const uint8_t *lm_pw,
+				const uint8_t *nt_pw,
+				const struct auth_usersupplied_info *user_info,
+				DATA_BLOB *user_sess_key,
+				DATA_BLOB *lm_sess_key)
+{
+	struct samr_Password _lm_hash, _nt_hash, _client_lm_hash, _client_nt_hash;
+	struct samr_Password *lm_hash = NULL;
+	struct samr_Password *nt_hash = NULL;
+	struct samr_Password *client_lm_hash = NULL;
+	struct samr_Password *client_nt_hash = NULL;
+
+	*user_sess_key = data_blob_null;
+	*lm_sess_key = data_blob_null;
+
+	if (acct_ctrl & ACB_PWNOTREQ) {
+		if (lp_null_passwords()) {
+			DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
+			return NT_STATUS_OK;
+		} else {
+			DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
+			return NT_STATUS_LOGON_FAILURE;
+		}
+	}
+
+	if (lm_pw) {
+		memcpy(_lm_hash.hash, lm_pw, sizeof(_lm_hash.hash));
+		lm_hash = &_lm_hash;
+	}
+	if (nt_pw) {
+		memcpy(_nt_hash.hash, nt_pw, sizeof(_nt_hash.hash));
+		nt_hash = &_nt_hash;
+	}
+	if (user_info->lm_interactive_pwd.data && sizeof(_client_lm_hash.hash) == user_info->lm_interactive_pwd.length) {
+		memcpy(_client_lm_hash.hash, user_info->lm_interactive_pwd.data, sizeof(_lm_hash.hash));
+		client_lm_hash = &_client_lm_hash;
+	}
+	if (user_info->nt_interactive_pwd.data && sizeof(_client_nt_hash.hash) == user_info->nt_interactive_pwd.length) {
+		memcpy(_client_nt_hash.hash, user_info->nt_interactive_pwd.data, sizeof(_nt_hash.hash));
+		client_nt_hash = &_client_nt_hash;
+	}
+
+	if (client_lm_hash || client_nt_hash) {
+		*user_sess_key = data_blob_talloc(mem_ctx, NULL, 16);
+		if (!user_sess_key->data) {
+			return NT_STATUS_NO_MEMORY;
+		}
+		SMBsesskeygen_ntv1(nt_pw, user_sess_key->data);
+		return hash_password_check(mem_ctx, lp_lanman_auth(),
+					   client_lm_hash,
+					   client_nt_hash,
+					   username,
+					   lm_hash,
+					   nt_hash);
+	} else {
+		return ntlm_password_check(mem_ctx, lp_lanman_auth(),
+					   lp_ntlm_auth(),
+					   user_info->logon_parameters,
+					   challenge,
+					   &user_info->lm_resp, &user_info->nt_resp,
+					   username,
+					   user_info->smb_name,
+					   user_info->client_domain,
+					   lm_hash,
+					   nt_hash,
+					   user_sess_key, lm_sess_key);
+	}
+}
+
+/****************************************************************************
+ Check if a user is allowed to logon at this time. Note this is the
+ servers local time, as logon hours are just specified as a weekly
+ bitmask.
+****************************************************************************/
+
+static bool logon_hours_ok(struct samu *sampass)
+{
+	/* In logon hours first bit is Sunday from 12AM to 1AM */
+	const uint8 *hours;
+	struct tm *utctime;
+	time_t lasttime;
+	const char *asct;
+	uint8 bitmask, bitpos;
+
+	hours = pdb_get_hours(sampass);
+	if (!hours) {
+		DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));
+		return True;
+	}
+
+	lasttime = time(NULL);
+	utctime = gmtime(&lasttime);
+	if (!utctime) {
+		DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
+			pdb_get_username(sampass) ));
+		return False;
+	}
+
+	/* find the corresponding byte and bit */
+	bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
+	bitmask = 1 << (bitpos % 8);
+
+	if (! (hours[bitpos/8] & bitmask)) {
+		struct tm *t = localtime(&lasttime);
+		if (!t) {
+			asct = "INVALID TIME";
+		} else {
+			asct = asctime(t);
+			if (!asct) {
+				asct = "INVALID TIME";
+			}
+		}
+
+		DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
+			  "logon at this time (%s).\n",
+			  pdb_get_username(sampass), asct ));
+		return False;
+	}
+
+	asct = asctime(utctime);
+	DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
+		pdb_get_username(sampass), asct ? asct : "UNKNOWN TIME" ));
+
+	return True;
+}
+
+/****************************************************************************
+ Do a specific test for a struct samu being valid for this connection
+ (ie not disabled, expired and the like).
+****************************************************************************/
+
+static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
+			       struct samu *sampass,
+			       const struct auth_usersupplied_info *user_info)
+{
+	uint32	acct_ctrl = pdb_get_acct_ctrl(sampass);
+	char *workstation_list;
+	time_t kickoff_time;
+
+	DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
+
+	/* Quit if the account was disabled. */
+	if (acct_ctrl & ACB_DISABLED) {
+		DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
+		return NT_STATUS_ACCOUNT_DISABLED;
+	}
+
+	/* Quit if the account was locked out. */
+	if (acct_ctrl & ACB_AUTOLOCK) {
+		DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
+		return NT_STATUS_ACCOUNT_LOCKED_OUT;
+	}
+
+	/* Quit if the account is not allowed to logon at this time. */
+	if (! logon_hours_ok(sampass)) {
+		return NT_STATUS_INVALID_LOGON_HOURS;
+	}
+
+	/* Test account expire time */
+
+	kickoff_time = pdb_get_kickoff_time(sampass);
+	if (kickoff_time != 0 && time(NULL) > kickoff_time) {
+		DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
+		DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
+		return NT_STATUS_ACCOUNT_EXPIRED;
+	}
+
+	if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP) && !(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)) {
+		time_t must_change_time = pdb_get_pass_must_change_time(sampass);
+		time_t last_set_time = pdb_get_pass_last_set_time(sampass);
+
+		/* check for immediate expiry "must change at next logon"
+		 * for a user account. */
+		if (((acct_ctrl & (ACB_WSTRUST|ACB_SVRTRUST)) == 0) && (last_set_time == 0)) {
+			DEBUG(1,("sam_account_ok: Account for user '%s' password must change!\n", pdb_get_username(sampass)));
+			return NT_STATUS_PASSWORD_MUST_CHANGE;
+		}
+
+		/* check for expired password */
+		if (must_change_time < time(NULL) && must_change_time != 0) {
+			DEBUG(1,("sam_account_ok: Account for user '%s' password expired!\n", pdb_get_username(sampass)));
+			DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(talloc_tos(), must_change_time), (long)must_change_time));
+			return NT_STATUS_PASSWORD_EXPIRED;
+		}
+	}
+
+	/* Test workstation. Workstation list is comma separated. */
+
+	workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
+	if (!workstation_list)
+		return NT_STATUS_NO_MEMORY;
+
+	if (*workstation_list) {
+		bool invalid_ws = True;
+		char *tok = NULL;
+		const char *s = workstation_list;
+		char *machine_name = talloc_asprintf(mem_ctx, "%s$", user_info->wksta_name);
+
+		if (machine_name == NULL)
+			return NT_STATUS_NO_MEMORY;
+
+		while (next_token_talloc(mem_ctx, &s, &tok, ",")) {
+			DEBUG(10,("sam_account_ok: checking for workstation match %s and %s\n",
+				  tok, user_info->wksta_name));
+			if(strequal(tok, user_info->wksta_name)) {
+				invalid_ws = False;
+				break;
+			}
+			if (tok[0] == '+') {
+				DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",
+					machine_name, tok + 1));
+				if (user_in_group(machine_name, tok + 1)) {
+					invalid_ws = False;
+					break;
+				}
+			}
+			TALLOC_FREE(tok);
+		}
+		TALLOC_FREE(tok);
+		TALLOC_FREE(machine_name);
+
+		if (invalid_ws)
+			return NT_STATUS_INVALID_WORKSTATION;
+	}
+
+	if (acct_ctrl & ACB_DOMTRUST) {
+		DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
+		return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
+	}
+
+	if (acct_ctrl & ACB_SVRTRUST) {
+		if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
+			DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
+			return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
+		}
+	}
+
+	if (acct_ctrl & ACB_WSTRUST) {
+		if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
+			DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
+			return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
+		}
+	}
+	return NT_STATUS_OK;
+}
+
+/**
+ * Check whether the given password is one of the last two
+ * password history entries. If so, the bad pwcount should
+ * not be incremented even thought the actual password check
+ * failed.
+ */
+static bool need_to_increment_bad_pw_count(
+	const DATA_BLOB *challenge,
+	struct samu* sampass,
+	const struct auth_usersupplied_info *user_info)
+{
+	uint8_t i;
+	const uint8_t *pwhistory;
+	uint32_t pwhistory_len;
+	uint32_t policy_pwhistory_len;
+	uint32_t acct_ctrl;
+	const char *username;
+	TALLOC_CTX *mem_ctx = talloc_stackframe();
+	bool result = true;
+
+	pdb_get_account_policy(PDB_POLICY_PASSWORD_HISTORY,
+			       &policy_pwhistory_len);
+	if (policy_pwhistory_len == 0) {
+		goto done;
+	}
+
+	pwhistory = pdb_get_pw_history(sampass, &pwhistory_len);
+	if (!pwhistory || pwhistory_len == 0) {
+		goto done;
+	}
+
+	acct_ctrl = pdb_get_acct_ctrl(sampass);
+	username = pdb_get_username(sampass);
+
+	for (i=1; i < MIN(MIN(3, policy_pwhistory_len), pwhistory_len); i++) {
+		static const uint8_t zero16[SALTED_MD5_HASH_LEN];
+		const uint8_t *salt;
+		const uint8_t *nt_pw;
+		NTSTATUS status;
+		DATA_BLOB user_sess_key = data_blob_null;
+		DATA_BLOB lm_sess_key = data_blob_null;
+
+		salt = &pwhistory[i*PW_HISTORY_ENTRY_LEN];
+		nt_pw = salt + PW_HISTORY_SALT_LEN;
+
+		if (memcmp(zero16, nt_pw, NT_HASH_LEN) == 0) {
+			/* skip zero password hash */
+			continue;
+		}
+
+		if (memcmp(zero16, salt, PW_HISTORY_SALT_LEN) != 0) {
+			/* skip nonzero salt (old format entry) */
+			continue;
+		}
+
+		status = sam_password_ok(mem_ctx,
+					 username, acct_ctrl,
+					 challenge,
+					 NULL, nt_pw,
+					 user_info, &user_sess_key, &lm_sess_key);
+		if (NT_STATUS_IS_OK(status)) {
+			result = false;
+			break;
+		}
+	}
+
+done:
+	TALLOC_FREE(mem_ctx);
+	return result;
+}
+
+/****************************************************************************
+check if a username/password is OK assuming the password is a 24 byte
+SMB hash supplied in the user_info structure
+return an NT_STATUS constant.
+****************************************************************************/
+
+NTSTATUS check_sam_security(const DATA_BLOB *challenge,
+			    TALLOC_CTX *mem_ctx,
+			    const struct auth_usersupplied_info *user_info,
+			    struct auth_serversupplied_info **server_info)
+{
+	struct samu *sampass=NULL;
+	bool ret;
+	NTSTATUS nt_status;
+	NTSTATUS update_login_attempts_status;
+	DATA_BLOB user_sess_key = data_blob_null;
+	DATA_BLOB lm_sess_key = data_blob_null;
+	bool updated_autolock = False, updated_badpw = False;
+	const char *username;
+	const uint8_t *nt_pw;
+	const uint8_t *lm_pw;
+
+	/* the returned struct gets kept on the server_info, by means
+	   of a steal further down */
+
+	sampass = samu_new(mem_ctx);
+	if (sampass == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* get the account information */
+
+	become_root();
+	ret = pdb_getsampwnam(sampass, user_info->internal_username);
+	unbecome_root();
+
+	if (ret == False) {
+		DEBUG(3,("check_sam_security: Couldn't find user '%s' in "
+			 "passdb.\n", user_info->internal_username));
+		TALLOC_FREE(sampass);
+		return NT_STATUS_NO_SUCH_USER;
+	}
+
+	username = pdb_get_username(sampass);
+	nt_pw = pdb_get_nt_passwd(sampass);
+	lm_pw = pdb_get_lanman_passwd(sampass);
+
+	/* see if autolock flag needs to be updated */
+	if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL)
+		pdb_update_autolock_flag(sampass, &updated_autolock);
+	/* Quit if the account was locked out. */
+	if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
+		DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", username));
+		return NT_STATUS_ACCOUNT_LOCKED_OUT;
+	}
+
+	nt_status = sam_password_ok(mem_ctx,
+				    username, pdb_get_acct_ctrl(sampass),
+				    challenge, lm_pw, nt_pw,
+				    user_info, &user_sess_key, &lm_sess_key);
+
+	/* Notify passdb backend of login success/failure. If not
+	   NT_STATUS_OK the backend doesn't like the login */
+
+	update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status));
+
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		bool increment_bad_pw_count = false;
+
+		if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) &&
+		    pdb_get_acct_ctrl(sampass) & ACB_NORMAL &&
+		    NT_STATUS_IS_OK(update_login_attempts_status))
+		{
+			increment_bad_pw_count =
+				need_to_increment_bad_pw_count(
+					challenge, sampass, user_info);
+		}
+
+		if (increment_bad_pw_count) {
+			pdb_increment_bad_password_count(sampass);
+			updated_badpw = True;
+		} else {
+			pdb_update_bad_password_count(sampass,
+						      &updated_badpw);
+		}
+		if (updated_autolock || updated_badpw){
+			NTSTATUS status;
+
+			become_root();
+			status = pdb_update_sam_account(sampass);
+			unbecome_root();
+
+			if (!NT_STATUS_IS_OK(status)) {
+				DEBUG(1, ("Failed to modify entry: %s\n",
+					  nt_errstr(status)));
+			}
+		}
+		goto done;
+	}
+
+	if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) &&
+	    (pdb_get_bad_password_count(sampass) > 0)){
+		pdb_set_bad_password_count(sampass, 0, PDB_CHANGED);
+		pdb_set_bad_password_time(sampass, 0, PDB_CHANGED);
+		updated_badpw = True;
+	}
+
+	if (updated_autolock || updated_badpw){
+		NTSTATUS status;
+
+		become_root();
+		status = pdb_update_sam_account(sampass);
+		unbecome_root();
+
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(1, ("Failed to modify entry: %s\n",
+				  nt_errstr(status)));
+		}
+	}
+
+	nt_status = sam_account_ok(mem_ctx, sampass, user_info);
+
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		goto done;
+	}
+
+	become_root();
+	nt_status = make_server_info_sam(server_info, sampass);
+	unbecome_root();
+	/*
+	 * sampass has been stolen to server_info.
+	 * So NULL it out to prevent segfaults.
+	 */
+	sampass = NULL;
+
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
+		goto done;
+	}
+
+	(*server_info)->user_session_key =
+		data_blob_talloc(*server_info, user_sess_key.data,
+				 user_sess_key.length);
+	data_blob_free(&user_sess_key);
+
+	(*server_info)->lm_session_key =
+		data_blob_talloc(*server_info, lm_sess_key.data,
+				 lm_sess_key.length);
+	data_blob_free(&lm_sess_key);
+
+	(*server_info)->nss_token |= user_info->was_mapped;
+
+done:
+	TALLOC_FREE(sampass);
+	data_blob_free(&user_sess_key);
+	data_blob_free(&lm_sess_key);
+	return nt_status;
+}