Adding pdb_xml and pdb_mysql passdb modules.

Added some consts to pdb_test to follow pdb_methods struct more strictly
(This used to be commit bb1c4501992650a5e26b4bc743aeae551852becc)

4 files changed, 1149 insertions, 0 deletions

diff --git a/examples/pdb/mysql/ChangeLog b/examples/pdb/mysql/ChangeLog
new file mode 100644
index 0000000000..5aeeb66268
--- /dev/null
+++ b/examples/pdb/mysql/ChangeLog
@@ -0,0 +1,41 @@
+** This file is now deprecated, use CVS' log featues **
+
+2002-06-13 Jelmer Vernooij <jelmer@samba.org>
+ * Converted to using SID's like samba HEAD does now
+ * Fixed some FIXME's
+
+2002-05-28 Jelmer Vernooij <jelmer@samba.org>
+ * Updated docs, after some testing by Vance Lankhaar
+
+2002-05-25 Jelmer Vernooij <jelmer@samba.org>
+ * Added support for dynamic debug classes
+ * Fixed nt/lanman password support
+ * Released 1.2
+
+2002-05-06 Jelmer Vernooij <jelmer@samba.org>
+ * Added support for multiple instances of pdb_mysql
+ * Added identifiers
+ * Updated documentation
+ * Released 1.1
+
+2002-04-27 Jelmer Vernooij <jelmer@samba.org>
+ * Updated documentation
+ * Released 1.0!
+
+2002-04-27 Jelmer Vernooij <jelmer@samba.org>
+ * Added update/add sam account support
+ * Released 0.4
+
+2002-04-13 Jelmer Vernooij <jelmer@samba.org>
+ * Support for multiple instances of pdb_mysql
+ * Released 0.3
+
+2002-04-12 Jelmer Vernooij <jelmer@samba.org>
+ * Now using lp_parm_string to retrieve configuration values (instead of
+   our configuration files)
+ * Updated documentation
+ * Released 0.2
+
+2002-04-10 Jelmer Vernooij <jelmer@samba.org>
+ * Released 0.1
+ * Initial release. Not supporting adding and updating data of users
diff --git a/examples/pdb/mysql/Makefile.in b/examples/pdb/mysql/Makefile.in
new file mode 100644
index 0000000000..1da6ea789e
--- /dev/null
+++ b/examples/pdb/mysql/Makefile.in
@@ -0,0 +1,33 @@
+PDB_OBJS	= pdb_mysql.so 
+PDB_LDFLAGS	= -lmysqlclient
+MAKEFILE	= Makefile.pdb
+
+include	$(MAKEFILE)
+
+CC		= @CC@
+LIBTOOL		= libtool
+CFLAGS		= @CFLAGS@ $(PDB_CFLAGS)
+CPPFLAGS	= @CPPFLAGS@ $(PDB_CPPFLAGS)
+LDFLAGS		= @LDFLAGS@ $(PDB_LDFLAGS)
+LDSHFLAGS	= -shared
+srcdir		= @builddir@
+FLAGS		=  $(CFLAGS) -Iinclude -I$(srcdir)/include -I$(srcdir)/ubiqx -I$(srcdir)/smbwrapper  -I. $(CPPFLAGS) -I$(srcdir)
+
+# Default target
+
+default: $(PDB_OBJS)
+
+# Pattern rules
+
+%.so: %.lo
+	$(LIBTOOL) $(CC) $(LDSHFLAGS) $(LDFLAGS) -o $@ $< 
+
+%.lo: %.c
+	$(LIBTOOL) $(CC) $(FLAGS) -c $<
+
+# Misc targets
+
+clean:
+	rm -rf .libs
+	rm -f core *~ *% *.bak \
+	$(PDB_OBJS) $(PDB_OBJS:.so=.o) $(PDB_OBJS:.so=.lo) 
diff --git a/examples/pdb/mysql/README b/examples/pdb/mysql/README
new file mode 100644
index 0000000000..e3cbcab8cf
--- /dev/null
+++ b/examples/pdb/mysql/README
@@ -0,0 +1,92 @@
+PDB MySQL plugin for samba v1.1
+--
+
+Building
+=========
+Before you can build the plugin, set the variable SAMBA_SRC in Makefile to the
+path containing the samba sources. This is usually the 'source' directory in 
+the samba tarball or CVS. 
+
+Next, type make, and then copy pdb_mysql.so to any location you want. I 
+strongly recommend installing it in $PREFIX/lib or /usr/lib/samba/
+
+Configuring
+============
+This plugin lacks some good documentation, but here is some short info:
+
+Add a the following to the 'passdb backend' variable in your smb.conf:
+
+passdb backend = [other-plugins] plugin:/location/to/pdb_mysql.so:identifier [other-plugins]
+
+The identifier can be any string you like, as long as it doesn't collide with 
+the identifiers of other plugins or other instances of pdb_mysql. If you 
+specify multiple pdb_mysql.so entries in 'passdb backend', you also need to 
+use different identifiers!
+
+Additional options can be given thru the smb.conf file in the [global] section.
+
+identifier:mysql host                     - host name, defaults to 'localhost'
+identifier:mysql password
+identifier:mysql user                     - defaults to 'samba'
+identifier:mysql database                 - defaults to 'samba'
+identifier:mysql port                     - defaults to 3306
+identifier:table                          - Name of the table containing users
+
+Names of the columns in this table(I've added column types those columns
+                                   should have first):
+identifier:logon time column             - int(9)
+identifier:logoff time column            - int(9)
+identifier:kickoff time column           - int(9)
+identifier:pass last set time column     - int(9)
+identifier:pass can change time column   - int(9)
+identifier:pass must change time column  - int(9)
+identifier:username column               - varchar(255) - unix username
+identifier:domain column                 - varchar(255) - NT domain user is part of
+identifier:nt username column            - varchar(255) - NT username
+identifier:fullname column            - varchar(255) - Full name of user
+identifier:home dir column               - varchar(255) - Unix homedir path
+identifier:dir drive column              - varchar(2) - Directory drive path (eg: 'H:')
+identifier:logon script column           - varchar(255) - Batch file to run on client side when logging on
+identifier:profile path column           - varchar(255) - Path of profile
+identifier:acct desc column              - varchar(255) - Some ASCII NT user data
+identifier:workstations column           - varchar(255) - Workstations user can logon to (or NULL for all)
+identifier:unknown string column         - varchar(255) - unknown string
+identifier:munged dial column            - varchar(255) - ?
+identifier:uid column                    - int(9) - Unix user ID (uid)
+identifier:gid column                    - int(9) - Unix user group (gid)
+identifier:user sid column               - varchar(255) - NT user SID
+identifier:group sid column              - varchar(255) - NT group ID
+identifier:lanman pass column            - varchar(255) - encrypted lanman password
+identifier:nt pass column                - varchar(255) - encrypted nt passwd
+identifier:plaintext pass column         - varchar(255) - plaintext password
+identifier:acct control column           - int(9) - nt user data
+identifier:unknown 3 column              - int(9) - unknown
+identifier:logon divs column             - int(9) - ?
+identifier:hours len column              - int(9) - ?
+identifier:unknown 5 column              - int(9) - unknown
+identifier:unknown 6 column              - int(9) - unknown
+
+Eventually, you can put a colon (:) after the name of each column, which 
+should specify the column to update when updating the table. You can also
+specify nothing behind the colon - then the data from the field will not be 
+updated. 
+
+Using plaintext passwords or encrypted password
+===============================================
+I strongly discourage the use of plaintext passwords, however, you can use them:
+
+If you would like to use plaintext passwords, set 'identifier:lanman pass column' and 'identifier:nt pass column' to 'NULL' (without the quotes) and 'identifier:plaintext pass column' to the name of the column containing the plaintext passwords. 
+
+If you use encrypted passwords, set the 'identifier:plaintext pass column' to 'NULL' (without the quotes). This is the default.
+
+Getting non-column data from the table
+======================================
+It is possible to have not all data in the database and making some 'constant'.
+
+For example, you can set 'identifier:fullname column' to : 
+    CONCAT(First_name,' ',Sur_name)
+
+Or, set 'identifier:workstations column' to :
+    NULL
+
+See the MySQL documentation for more language constructs.
diff --git a/examples/pdb/mysql/pdb_mysql.c b/examples/pdb/mysql/pdb_mysql.c
new file mode 100644
index 0000000000..c7e9e781c3
--- /dev/null
+++ b/examples/pdb/mysql/pdb_mysql.c
@@ -0,0 +1,983 @@
+
+/*
+ * MySQL password backend for samba
+ * Copyright (C) Jelmer Vernooij 2002
+ * 
+ * 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 2 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, write to the Free Software Foundation, Inc., 675
+ * Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+#include <mysql/mysql.h>
+
+#define CONFIG_TABLE_DEFAULT				"user"
+#define CONFIG_LOGON_TIME_DEFAULT			"logon_time"
+#define CONFIG_LOGOFF_TIME_DEFAULT			"logoff_time"
+#define CONFIG_KICKOFF_TIME_DEFAULT			"kickoff_time"
+#define CONFIG_PASS_LAST_SET_TIME_DEFAULT	"pass_last_set_time"
+#define CONFIG_PASS_CAN_CHANGE_TIME_DEFAULT	"pass_can_change_time"
+#define CONFIG_PASS_MUST_CHANGE_TIME_DEFAULT "pass_must_change_time"
+#define CONFIG_USERNAME_DEFAULT 			"username"
+#define CONFIG_DOMAIN_DEFAULT				"domain"
+#define CONFIG_NT_USERNAME_DEFAULT  		"nt_username"
+#define CONFIG_FULLNAME_DEFAULT				"nt_fullname"
+#define CONFIG_HOME_DIR_DEFAULT				"home_dir"
+#define CONFIG_DIR_DRIVE_DEFAULT			"dir_drive"
+#define CONFIG_LOGON_SCRIPT_DEFAULT			"logon_script"
+#define CONFIG_PROFILE_PATH_DEFAULT			"profile_path"
+#define CONFIG_ACCT_DESC_DEFAULT			"acct_desc"
+#define CONFIG_WORKSTATIONS_DEFAULT			"workstations"
+#define CONFIG_UNKNOWN_STR_DEFAULT			"unknown_str"
+#define CONFIG_MUNGED_DIAL_DEFAULT			"munged_dial"
+#define CONFIG_UID_DEFAULT					"uid"
+#define CONFIG_GID_DEFAULT					"gid"
+#define CONFIG_USER_SID_DEFAULT				"user_sid"
+#define CONFIG_GROUP_SID_DEFAULT			"group_sid"
+#define CONFIG_LM_PW_DEFAULT				"lm_pw"
+#define CONFIG_NT_PW_DEFAULT				"nt_pw"
+#define CONFIG_PLAIN_PW_DEFAULT				"NULL"
+#define CONFIG_ACCT_CTRL_DEFAULT			"acct_ctrl"
+#define CONFIG_UNKNOWN_3_DEFAULT			"unknown_3"
+#define CONFIG_LOGON_DIVS_DEFAULT			"logon_divs"
+#define CONFIG_HOURS_LEN_DEFAULT			"hours_len"
+#define CONFIG_UNKNOWN_5_DEFAULT			"unknown_5"
+#define CONFIG_UNKNOWN_6_DEFAULT			"unknown_6"
+#define CONFIG_HOST_DEFAULT					"localhost"
+#define CONFIG_USER_DEFAULT					"samba"
+#define CONFIG_PASS_DEFAULT					""
+#define CONFIG_PORT_DEFAULT					"3306"
+#define CONFIG_DB_DEFAULT					"samba"
+
+static int mysqlsam_debug_level = DBGC_ALL;
+
+#undef DBGC_CLASS
+#define DBGC_CLASS mysqlsam_debug_level
+
+PDB_MODULE_VERSIONING_MAGIC
+
+typedef struct pdb_mysql_data {
+	MYSQL *handle;
+	MYSQL_RES *pwent;
+	char *location;
+} pdb_mysql_data;
+
+/* Used to construct insert and update queries */
+
+typedef struct pdb_mysql_query {
+	char update;
+	TALLOC_CTX *mem_ctx;
+	char *part1;
+	char *part2;
+} pdb_mysql_query;
+
+#define SET_DATA(data,methods) { \
+	if(!methods){ \
+		DEBUG(0, ("invalid methods!\n")); \
+			return False; \
+	} \
+	data = (struct pdb_mysql_data *)methods->private_data; \
+		if(!data || !(data->handle)){ \
+			DEBUG(0, ("invalid handle!\n")); \
+				return False; \
+		} \
+}
+void
+pdb_mysql_int_field(struct pdb_methods *m,
+					struct pdb_mysql_query *q, char *name, int value)
+{
+	if (!name || strchr(name, '\''))
+		return;                 /* This field shouldn't be set by us */
+
+	if (q->update) {
+		q->part1 =
+			talloc_asprintf_append(q->mem_ctx, q->part1,
+								   "%s = %d,", name, value);
+	} else {
+		q->part1 =
+			talloc_asprintf_append(q->mem_ctx, q->part1, "%s,", name);
+		q->part2 =
+			talloc_asprintf_append(q->mem_ctx, q->part2, "%d,", value);
+	}
+}
+
+static BOOL
+pdb_mysql_string_field(struct pdb_methods *methods,
+					   struct pdb_mysql_query *q,
+					   char *name, const char *value)
+{
+	char *esc_value;
+	struct pdb_mysql_data *data;
+
+	SET_DATA(data, methods);
+
+	if (!name || !value || !strcmp(value, "") || strchr(name, '\''))
+		return False;   /* This field shouldn't be set by module */
+
+	esc_value = malloc(strlen(value) * 2 + 1);
+	mysql_real_escape_string(data->handle, esc_value, (char *) value,
+							 strlen(value));
+
+	if (q->update) {
+		q->part1 =
+			talloc_asprintf_append(q->mem_ctx, q->part1,
+								   "%s = '%s',", name, esc_value);
+	} else {
+		q->part1 =
+			talloc_asprintf_append(q->mem_ctx, q->part1, "%s,", name);
+		q->part2 =
+			talloc_asprintf_append(q->mem_ctx, q->part2, "'%s',",
+								   esc_value);
+	}
+
+	SAFE_FREE(esc_value);
+
+	return True;
+}
+
+static char *
+config_value(pdb_mysql_data * data, char *name, char *default_value)
+{
+	if (lp_parm_string(NULL, data->location, name))
+		return lp_parm_string(NULL, data->location, name);
+
+	return default_value;
+}
+
+static char *
+config_value_write(pdb_mysql_data * data, char *name, char *default_value)
+{
+	char *v = config_value(data, name, NULL);
+	char *write;
+
+	if (!v)
+		return default_value;
+
+	write = strchr(v, ':');
+
+	/* Default to the same field as read field */
+	if (!write)
+		return v;
+
+	write++;
+
+	/* If the field is 0 chars long, we shouldn't write to it */
+	if (!strlen(write) || !strcmp(write, "NULL"))
+		return NULL;
+
+	/* Otherwise, use the additionally specified */
+	return write;
+}
+
+static const char *
+config_value_read(pdb_mysql_data * data, char *name, char *default_value)
+{
+	char *v = config_value(data, name, NULL);
+	char *write;
+
+	if (!v)
+		return default_value;
+
+	write = strchr(v, ':');
+
+	/* If no write is specified, there are no problems */
+	if (!write) {
+		if (strlen(v) == 0)
+			return "NULL";
+		return v;
+	}
+
+	/* Otherwise, we have to cut the ':write_part' */
+	*write = '\0';
+	if (strlen(v) == 0)
+		return "NULL";
+
+	return v;
+}
+
+/* Wrapper for atol that returns 0 if 'a' points to NULL */
+static long
+xatol(char *a)
+{
+	long ret = 0;
+
+	if (a != NULL)
+		ret = atol(a);
+
+	return ret;
+}
+
+static BOOL
+row_to_sam_account(MYSQL_RES * r, SAM_ACCOUNT * u)
+{
+	MYSQL_ROW row;
+	pstring temp;
+	unsigned int num_fields;
+	unsigned long *lengths;
+	DOM_SID sid;
+
+	num_fields = mysql_num_fields(r);
+	row = mysql_fetch_row(r);
+	if (!row)
+		return False;
+
+	pdb_set_logon_time(u, xatol(row[0]), FALSE);
+	pdb_set_logoff_time(u, xatol(row[1]), FALSE);
+	pdb_set_kickoff_time(u, xatol(row[2]), FALSE);
+	pdb_set_pass_last_set_time(u, xatol(row[3]));
+	pdb_set_pass_can_change_time(u, xatol(row[4]), FALSE);
+	pdb_set_pass_must_change_time(u, xatol(row[5]), FALSE);
+	pdb_set_username(u, row[6]);
+	pdb_set_domain(u, row[7]);
+	pdb_set_nt_username(u, row[8]);
+	pdb_set_fullname(u, row[9]);
+	pdb_set_homedir(u, row[10], True);
+	pdb_set_dir_drive(u, row[11], True);
+	pdb_set_logon_script(u, row[12], True);
+	pdb_set_profile_path(u, row[13], True);
+	pdb_set_acct_desc(u, row[14]);
+	pdb_set_workstations(u, row[15]);
+	pdb_set_unknown_str(u, row[16]);
+	pdb_set_munged_dial(u, row[17]);
+
+	if (row[18])
+		pdb_set_uid(u, xatol(row[18]));
+	if (row[19])
+		pdb_set_gid(u, xatol(row[19]));
+
+	string_to_sid(&sid, row[20]);
+	pdb_set_user_sid(u, &sid);
+	string_to_sid(&sid, row[21]);
+	pdb_set_group_sid(u, &sid);
+
+	if (pdb_gethexpwd(row[22], temp))
+		pdb_set_lanman_passwd(u, temp);
+	if (pdb_gethexpwd(row[23], temp))
+		pdb_set_nt_passwd(u, temp);
+
+	/* Only use plaintext password storage when lanman and nt are
+	 * NOT used */
+	if (!row[22] || !row[23])
+		pdb_set_plaintext_passwd(u, row[24]);
+
+	pdb_set_acct_ctrl(u, xatol(row[25]));
+	pdb_set_unknown_3(u, xatol(row[26]));
+	pdb_set_logon_divs(u, xatol(row[27]));
+	pdb_set_hours_len(u, xatol(row[28]));
+	pdb_set_unknown_5(u, xatol(row[29]));
+	pdb_set_unknown_6(u, xatol(row[30]));
+
+	return True;
+}
+
+static BOOL
+mysqlsam_setsampwent(struct pdb_methods *methods, BOOL update)
+{
+	struct pdb_mysql_data *data =
+		(struct pdb_mysql_data *) methods->private_data;
+	char *query;
+	int ret;
+
+	if (!data || !(data->handle)) {
+		DEBUG(0, ("invalid handle!\n"));
+		return False;
+	}
+
+	asprintf(&query,
+			 "SELECT %s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s FROM %s",
+			 config_value_read(data, "logon time column",
+							   CONFIG_LOGON_TIME_DEFAULT),
+			 config_value_read(data, "logoff time column",
+							   CONFIG_LOGOFF_TIME_DEFAULT),
+			 config_value_read(data, "kickoff time column",
+							   CONFIG_KICKOFF_TIME_DEFAULT),
+			 config_value_read(data, "pass last set time column",
+							   CONFIG_PASS_LAST_SET_TIME_DEFAULT),
+			 config_value_read(data, "pass can change time column",
+							   CONFIG_PASS_CAN_CHANGE_TIME_DEFAULT),
+			 config_value_read(data, "pass must change time column",
+							   CONFIG_PASS_MUST_CHANGE_TIME_DEFAULT),
+			 config_value_read(data, "username column",
+							   CONFIG_USERNAME_DEFAULT),
+			 config_value_read(data, "domain column",
+							   CONFIG_DOMAIN_DEFAULT),
+			 config_value_read(data, "nt username column",
+							   CONFIG_NT_USERNAME_DEFAULT),
+			 config_value_read(data, "fullname column",
+							   CONFIG_FULLNAME_DEFAULT),
+			 config_value_read(data, "home dir column",
+							   CONFIG_HOME_DIR_DEFAULT),
+			 config_value_read(data, "dir drive column",
+							   CONFIG_DIR_DRIVE_DEFAULT),
+			 config_value_read(data, "logon script column",
+							   CONFIG_LOGON_SCRIPT_DEFAULT),
+			 config_value_read(data, "profile path column",
+							   CONFIG_PROFILE_PATH_DEFAULT),
+			 config_value_read(data, "acct desc column",
+							   CONFIG_ACCT_DESC_DEFAULT),
+			 config_value_read(data, "workstations column",
+							   CONFIG_WORKSTATIONS_DEFAULT),
+			 config_value_read(data, "unknown string column",
+							   CONFIG_UNKNOWN_STR_DEFAULT),
+			 config_value_read(data, "munged dial column",
+							   CONFIG_MUNGED_DIAL_DEFAULT),
+			 config_value_read(data, "uid column", CONFIG_UID_DEFAULT),
+			 config_value_read(data, "gid column", CONFIG_GID_DEFAULT),
+			 config_value_read(data, "user sid column",
+							   CONFIG_USER_SID_DEFAULT),
+			 config_value_read(data, "group sid column",
+							   CONFIG_GROUP_SID_DEFAULT),
+			 config_value_read(data, "lanman pass column",
+							   CONFIG_LM_PW_DEFAULT),
+			 config_value_read(data, "nt pass column",
+							   CONFIG_NT_PW_DEFAULT),
+			 config_value_read(data, "plain pass column",
+							   CONFIG_PLAIN_PW_DEFAULT),
+			 config_value_read(data, "acct ctrl column",
+							   CONFIG_ACCT_CTRL_DEFAULT),
+			 config_value_read(data, "unknown 3 column",
+							   CONFIG_UNKNOWN_3_DEFAULT),
+			 config_value_read(data, "logon divs column",
+							   CONFIG_LOGON_DIVS_DEFAULT),
+			 config_value_read(data, "hours len column",
+							   CONFIG_HOURS_LEN_DEFAULT),
+			 config_value_read(data, "unknown 5 column",
+							   CONFIG_UNKNOWN_5_DEFAULT),
+			 config_value_read(data, "unknown 6 column",
+							   CONFIG_UNKNOWN_6_DEFAULT),
+			 config_value(data, "table", CONFIG_TABLE_DEFAULT)
+				 );
+	
+	ret = mysql_query(data->handle, query);
+	SAFE_FREE(query);
+
+	if (ret) {
+		DEBUG(0,
+			   ("Error executing query: %s\n", mysql_error(data->handle)));
+		return False;
+	}
+
+	data->pwent = mysql_store_result(data->handle);
+
+	if (data->pwent == NULL) {
+		DEBUG(0,
+			("Error storing results: %s\n", mysql_error(data->handle)));
+		return False;
+	}
+	
+	DEBUG(5,
+		("mysqlsam_setsampwent succeeded(%d results)!\n",
+				mysql_num_fields(data->pwent)));
+	
+	return True;
+}
+
+/***************************************************************
+  End enumeration of the passwd list.
+ ****************************************************************/
+
+static void
+mysqlsam_endsampwent(struct pdb_methods *methods)
+{
+	struct pdb_mysql_data *data =
+		(struct pdb_mysql_data *) methods->private_data;
+
+	if (data == NULL) {
+		DEBUG(0, ("invalid handle!\n"));
+		return;
+	}
+
+	if (data->pwent != NULL)
+		mysql_free_result(data->pwent);
+
+	data->pwent = NULL;
+
+	DEBUG(5, ("mysql_endsampwent called\n"));
+}
+
+/*****************************************************************
+  Get one SAM_ACCOUNT from the list (next in line)
+ *****************************************************************/
+
+static BOOL
+mysqlsam_getsampwent(struct pdb_methods *methods, SAM_ACCOUNT * user)
+{
+	struct pdb_mysql_data *data;
+
+	SET_DATA(data, methods);
+
+	if (data->pwent == NULL) {
+		DEBUG(0, ("invalid pwent\n"));
+		return False;
+	}
+
+	return row_to_sam_account(data->pwent, user);
+}
+
+BOOL
+mysqlsam_select_by_field(struct pdb_methods * methods, SAM_ACCOUNT * user,
+						 const char *field, const char *sname)
+{
+	char *esc_sname;
+	char *query;
+	int ret;
+	MYSQL_RES *res;
+	struct pdb_mysql_data *data;
+
+	SET_DATA(data, methods);
+
+	esc_sname = malloc(strlen(sname) * 2 + 1);
+	if (!esc_sname) {
+		DEBUG(0, ("Not enough memory available!\n"));
+		return False;
+	}
+
+	DEBUG(5,
+		  ("mysqlsam_select_by_field: getting data where %s = %s(nonescaped)\n",
+		   field, sname));
+
+	/* Escape sname */
+	mysql_real_escape_string(data->handle, esc_sname, (char *) sname,
+							 strlen(sname));
+
+	if (user == NULL) {
+		DEBUG(0, ("pdb_getsampwnam: SAM_ACCOUNT is NULL.\n"));
+		SAFE_FREE(esc_sname);
+		return False;
+	}
+
+	asprintf(&query,
+			 "SELECT %s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s FROM %s WHERE %s = '%s'",
+			 config_value_read(data, "logon time column",
+							   CONFIG_LOGON_TIME_DEFAULT),
+			 config_value_read(data, "logoff time column",
+							   CONFIG_LOGOFF_TIME_DEFAULT),
+			 config_value_read(data, "kickoff time column",
+							   CONFIG_KICKOFF_TIME_DEFAULT),
+			 config_value_read(data, "pass last set time column",
+							   CONFIG_PASS_LAST_SET_TIME_DEFAULT),
+			 config_value_read(data, "pass can change time column",
+							   CONFIG_PASS_CAN_CHANGE_TIME_DEFAULT),
+			 config_value_read(data, "pass must change time column",
+							   CONFIG_PASS_MUST_CHANGE_TIME_DEFAULT),
+			 config_value_read(data, "username column",
+							   CONFIG_USERNAME_DEFAULT),
+			 config_value_read(data, "domain column",
+							   CONFIG_DOMAIN_DEFAULT),
+			 config_value_read(data, "nt username column",
+							   CONFIG_NT_USERNAME_DEFAULT),
+			 config_value_read(data, "fullname column",
+							   CONFIG_FULLNAME_DEFAULT),
+			 config_value_read(data, "home dir column",
+							   CONFIG_HOME_DIR_DEFAULT),
+			 config_value_read(data, "dir drive column",
+							   CONFIG_DIR_DRIVE_DEFAULT),
+			 config_value_read(data, "logon script column",
+							   CONFIG_LOGON_SCRIPT_DEFAULT),
+			 config_value_read(data, "profile path column",
+							   CONFIG_PROFILE_PATH_DEFAULT),
+			 config_value_read(data, "acct desc column",
+							   CONFIG_ACCT_DESC_DEFAULT),
+			 config_value_read(data, "workstations column",
+							   CONFIG_WORKSTATIONS_DEFAULT),
+			 config_value_read(data, "unknown string column",
+							   CONFIG_UNKNOWN_STR_DEFAULT),
+			 config_value_read(data, "munged dial column",
+							   CONFIG_MUNGED_DIAL_DEFAULT),
+			 config_value_read(data, "uid column", CONFIG_UID_DEFAULT),
+			 config_value_read(data, "gid column", CONFIG_GID_DEFAULT),
+			 config_value_read(data, "user sid column",
+							   CONFIG_USER_SID_DEFAULT),
+			 config_value_read(data, "group sid column",
+							   CONFIG_GROUP_SID_DEFAULT),
+			 config_value_read(data, "lanman pass column",
+							   CONFIG_LM_PW_DEFAULT),
+			 config_value_read(data, "nt pass column",
+							   CONFIG_NT_PW_DEFAULT),
+			 config_value_read(data, "plain pass column",
+							   CONFIG_PLAIN_PW_DEFAULT),
+			 config_value_read(data, "acct ctrl column",
+							   CONFIG_ACCT_CTRL_DEFAULT),
+			 config_value_read(data, "unknown 3 column",
+							   CONFIG_UNKNOWN_3_DEFAULT),
+			 config_value_read(data, "logon divs column",
+							   CONFIG_LOGON_DIVS_DEFAULT),
+			 config_value_read(data, "hours len column",
+							   CONFIG_HOURS_LEN_DEFAULT),
+			 config_value_read(data, "unknown 5 column",
+							   CONFIG_UNKNOWN_5_DEFAULT),
+			 config_value_read(data, "unknown 6 column",
+							   CONFIG_UNKNOWN_6_DEFAULT),
+			 config_value(data, "table", CONFIG_TABLE_DEFAULT), field,
+			 esc_sname);
+	
+	SAFE_FREE(esc_sname);
+	
+	ret = mysql_query(data->handle, query);
+	
+	SAFE_FREE(query);
+	
+	if (ret) {
+		DEBUG(0,
+			("Error while executing MySQL query: %s\n",
+				mysql_error(data->handle)));
+		return False;
+	}
+	
+	res = mysql_store_result(data->handle);
+	if (res == NULL) {
+		DEBUG(0,
+			("Error storing results: %s\n", mysql_error(data->handle)));
+		return False;
+	}
+	
+	ret = row_to_sam_account(res, user);
+	mysql_free_result(res);
+
+	return ret;
+}
+
+/******************************************************************
+  Lookup a name in the SAM database
+ ******************************************************************/
+
+static BOOL
+mysqlsam_getsampwnam(struct pdb_methods *methods, SAM_ACCOUNT * user,
+					 const char *sname)
+{
+	struct pdb_mysql_data *data;
+
+	SET_DATA(data, methods);
+
+	if (!sname) {
+		DEBUG(0, ("invalid name specified"));
+		return False;
+	}
+	return mysqlsam_select_by_field(methods, user,
+			config_value_read(data, "username column",
+				CONFIG_USERNAME_DEFAULT), sname);
+}
+
+
+/***************************************************************************
+  Search by sid
+ **************************************************************************/
+
+static BOOL
+mysqlsam_getsampwsid(struct pdb_methods *methods, SAM_ACCOUNT * user,
+					 const DOM_SID * sid)
+{
+	BOOL ret = False;
+	struct pdb_mysql_data *data;
+	fstring sid_str;
+
+	SET_DATA(data, methods);
+
+	sid_to_string(sid_str, sid);
+
+	ret =
+		mysqlsam_select_by_field(methods, user,
+			config_value_read(data, "user sid column",
+				CONFIG_USER_SID_DEFAULT), sid_str);
+
+	return ret;
+}
+
+/***************************************************************************
+  Delete a SAM_ACCOUNT
+ ****************************************************************************/
+
+static BOOL
+mysqlsam_delete_sam_account(struct pdb_methods *methods,
+							SAM_ACCOUNT * sam_pass)
+{
+	const char *sname = pdb_get_username(sam_pass);
+	char *esc;
+	char *query;
+	int ret;
+	struct pdb_mysql_data *data;
+
+	SET_DATA(data, methods);
+
+	if (!methods) {
+		DEBUG(0, ("invalid methods!\n"));
+		return False;
+	}
+
+	data = (struct pdb_mysql_data *) methods->private_data;
+	if (!data || !(data->handle)) {
+		DEBUG(0, ("invalid handle!\n"));
+		return False;
+	}
+
+	if (!sname) {
+		DEBUG(0, ("invalid name specified\n"));
+		return False;
+	}
+
+	/* Escape sname */
+	esc = malloc(strlen(sname) * 2 + 1);
+	if (!esc) {
+		DEBUG(0, ("Can't allocate memory to store escaped name\n"));
+		return False;
+	}
+	mysql_real_escape_string(data->handle, esc, (char *) sname,
+							 strlen(sname));
+
+	asprintf(&query, "DELETE FROM %s WHERE %s = '%s'",
+			 config_value(data, "table", CONFIG_TABLE_DEFAULT),
+			 config_value_read(data, "username column",
+							   CONFIG_USERNAME_DEFAULT), esc);
+
+	SAFE_FREE(esc);
+
+	ret = mysql_query(data->handle, query);
+
+	SAFE_FREE(query);
+
+	if (ret) {
+		DEBUG(0,
+			  ("Error while executing query: %s\n",
+			   mysql_error(data->handle)));
+		return False;
+	}
+
+	DEBUG(5, ("User '%s' deleted\n", sname));
+	return True;
+}
+
+static BOOL
+mysqlsam_replace_sam_account(struct pdb_methods *methods,
+							 const SAM_ACCOUNT * newpwd, char isupdate)
+{
+	pstring temp;
+	uint32 store = pdb_get_init_flag(newpwd);
+	struct pdb_mysql_data *data;
+	pdb_mysql_query query;
+	fstring sid_str;
+
+	if (!methods) {
+		DEBUG(0, ("invalid methods!\n"));
+		return False;
+	}
+
+	data = (struct pdb_mysql_data *) methods->private_data;
+	if (data == NULL || data->handle == NULL) {
+		DEBUG(0, ("invalid handle!\n"));
+		return False;
+	}
+	query.update = isupdate;
+
+	/* I know this is somewhat overkill but only the talloc 
+	 * functions have asprint_append and the 'normal' asprintf 
+	 * is a GNU extension */
+	query.mem_ctx = talloc_init();
+	query.part2 = talloc_asprintf(query.mem_ctx, "%s", "");
+	if (query.update) {
+		query.part1 =
+			talloc_asprintf(query.mem_ctx, "UPDATE %s SET ",
+							config_value(data, "table",
+										 CONFIG_TABLE_DEFAULT));
+	} else {
+		query.part1 =
+			talloc_asprintf(query.mem_ctx, "INSERT INTO %s (",
+							config_value(data, "table",
+										 CONFIG_TABLE_DEFAULT));
+	}
+
+	pdb_mysql_int_field(methods, &query,
+						config_value_write(data, "acct ctrl column",
+										   CONFIG_ACCT_CTRL_DEFAULT),
+						pdb_get_acct_ctrl(newpwd));
+
+	if (store & FLAG_SAM_LOGONTIME) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data,
+											   "logon time column",
+											   CONFIG_LOGON_TIME_DEFAULT),
+							pdb_get_logon_time(newpwd));
+	}
+
+	if (store & FLAG_SAM_LOGOFFTIME) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data,
+											   "logoff time column",
+											   CONFIG_LOGOFF_TIME_DEFAULT),
+							pdb_get_logoff_time(newpwd));
+	}
+
+	if (store & FLAG_SAM_KICKOFFTIME) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data,
+											   "kickoff time column",
+											   CONFIG_KICKOFF_TIME_DEFAULT),
+							pdb_get_kickoff_time(newpwd));
+	}
+
+	if (store & FLAG_SAM_CANCHANGETIME) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data,
+											   "pass can change time column",
+											   CONFIG_PASS_CAN_CHANGE_TIME_DEFAULT),
+							pdb_get_pass_can_change_time(newpwd));
+	}
+
+	if (store & FLAG_SAM_MUSTCHANGETIME) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data,
+											   "pass must change time column",
+											   CONFIG_PASS_MUST_CHANGE_TIME_DEFAULT),
+							pdb_get_pass_must_change_time(newpwd));
+	}
+
+	if (pdb_get_pass_last_set_time(newpwd)) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data,
+											   "pass must change time column",
+											   CONFIG_PASS_LAST_SET_TIME_DEFAULT),
+							pdb_get_pass_last_set_time(newpwd));
+	}
+
+	if (pdb_get_hours_len(newpwd)) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data,
+											   "hours len column",
+											   CONFIG_HOURS_LEN_DEFAULT),
+							pdb_get_hours_len(newpwd));
+	}
+
+	if (pdb_get_logon_divs(newpwd)) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data,
+											   "logon divs column",
+											   CONFIG_LOGON_DIVS_DEFAULT),
+							pdb_get_logon_divs(newpwd));
+	}
+
+	if (store & FLAG_SAM_UID) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data, "uid column",
+											   CONFIG_UID_DEFAULT),
+							pdb_get_uid(newpwd));
+	}
+
+	if (store & FLAG_SAM_GID) {
+		pdb_mysql_int_field(methods, &query,
+							config_value_write(data, "gid column",
+											   CONFIG_GID_DEFAULT),
+							pdb_get_gid(newpwd));
+	}
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data, "user sid column",
+											  CONFIG_USER_SID_DEFAULT),
+						   sid_to_string(sid_str, (DOM_SID *)
+										 pdb_get_user_sid(newpwd)));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data, "group sid column",
+											  CONFIG_GROUP_SID_DEFAULT),
+						   sid_to_string(sid_str, (DOM_SID *)
+										 pdb_get_group_sid(newpwd)));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data, "username column",
+											  CONFIG_USERNAME_DEFAULT),
+						   pdb_get_username(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data, "domain column",
+											  CONFIG_DOMAIN_DEFAULT),
+						   pdb_get_domain(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data,
+											  "nt username column",
+											  CONFIG_NT_USERNAME_DEFAULT),
+						   pdb_get_nt_username(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data, "fullname column",
+											  CONFIG_FULLNAME_DEFAULT),
+						   pdb_get_fullname(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data,
+											  "logon script column",
+											  CONFIG_LOGON_SCRIPT_DEFAULT),
+						   pdb_get_logon_script(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data,
+											  "profile path column",
+											  CONFIG_PROFILE_PATH_DEFAULT),
+						   pdb_get_profile_path(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data, "dir drive column",
+											  CONFIG_DIR_DRIVE_DEFAULT),
+						   pdb_get_dir_drive(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data, "home dir column",
+											  CONFIG_HOME_DIR_DEFAULT),
+						   pdb_get_homedir(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data,
+											  "workstations column",
+											  CONFIG_WORKSTATIONS_DEFAULT),
+						   pdb_get_workstations(newpwd));
+
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data,
+											  "unknown string column",
+											  CONFIG_UNKNOWN_STR_DEFAULT),
+						   pdb_get_workstations(newpwd));
+
+	pdb_sethexpwd(temp, pdb_get_lanman_passwd(newpwd),
+				  pdb_get_acct_ctrl(newpwd));
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data,
+											  "lanman pass column",
+											  CONFIG_LM_PW_DEFAULT), temp);
+
+	pdb_sethexpwd(temp, pdb_get_nt_passwd(newpwd),
+				  pdb_get_acct_ctrl(newpwd));
+	pdb_mysql_string_field(methods, &query,
+						   config_value_write(data, "nt pass column",
+											  CONFIG_NT_PW_DEFAULT), temp);
+
+	if (query.update) {
+		query.part1[strlen(query.part1) - 1] = '\0';
+		query.part1 =
+			talloc_asprintf_append(query.mem_ctx, query.part1,
+								   " WHERE %s = '%s'",
+								   config_value_read(data,
+													 "user sid column",
+													 CONFIG_USER_SID_DEFAULT),
+								   sid_to_string(sid_str, (DOM_SID *)
+												 pdb_get_user_sid
+												 (newpwd)));
+	} else {
+		query.part2[strlen(query.part2) - 1] = ')';
+		query.part1[strlen(query.part1) - 1] = ')';
+		query.part1 =
+			talloc_asprintf_append(query.mem_ctx, query.part1,
+								   " VALUES (%s", query.part2);
+	}
+
+	DEBUG(0, ("%s\n", query.part1));
+	/* Execute the query */
+	if (mysql_query(data->handle, query.part1)) {
+		DEBUG(0,
+			  ("Error executing %s, %s\n", query.part1,
+			   mysql_error(data->handle)));
+		return False;
+	}
+	talloc_destroy(query.mem_ctx);
+	return True;
+}
+
+static BOOL
+mysqlsam_add_sam_account(struct pdb_methods *methods, SAM_ACCOUNT * newpwd)
+{
+	return mysqlsam_replace_sam_account(methods, newpwd, 0);
+}
+
+static BOOL
+mysqlsam_update_sam_account(struct pdb_methods *methods,
+							SAM_ACCOUNT * newpwd)
+{
+	return mysqlsam_replace_sam_account(methods, newpwd, 1);
+}
+
+NTSTATUS
+pdb_init(PDB_CONTEXT * pdb_context, PDB_METHODS ** pdb_method,
+		 char *location)
+{
+	NTSTATUS nt_status;
+	struct pdb_mysql_data *data;
+
+	mysqlsam_debug_level = debug_add_class("mysqlsam");
+	if (mysqlsam_debug_level == -1) {
+		mysqlsam_debug_level = DBGC_ALL;
+		DEBUG(0,
+			  ("mysqlsam: Couldn't register custom debugging class!\n"));
+	}
+
+	if (!pdb_context) {
+		DEBUG(0, ("invalid pdb_methods specified\n"));
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	if (!NT_STATUS_IS_OK
+		(nt_status = make_pdb_methods(pdb_context->mem_ctx, pdb_method))) {
+		return nt_status;
+	}
+
+	(*pdb_method)->name = "mysqlsam";
+
+	(*pdb_method)->setsampwent = mysqlsam_setsampwent;
+	(*pdb_method)->endsampwent = mysqlsam_endsampwent;
+	(*pdb_method)->getsampwent = mysqlsam_getsampwent;
+	(*pdb_method)->getsampwnam = mysqlsam_getsampwnam;
+	(*pdb_method)->getsampwsid = mysqlsam_getsampwsid;
+	(*pdb_method)->add_sam_account = mysqlsam_add_sam_account;
+	(*pdb_method)->update_sam_account = mysqlsam_update_sam_account;
+	(*pdb_method)->delete_sam_account = mysqlsam_delete_sam_account;
+
+	data = talloc(pdb_context->mem_ctx, sizeof(struct pdb_mysql_data));
+	(*pdb_method)->private_data = data;
+	data->handle = NULL;
+	data->pwent = NULL;
+
+	if (!location) {
+		DEBUG(0, ("No identifier specified. See README for details\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	data->location = smb_xstrdup(location);
+
+	DEBUG(1,
+		  ("Connecting to database server, host: %s, user: %s, password: %s, database: %s, port: %d\n",
+		   config_value(data, "mysql host", CONFIG_HOST_DEFAULT),
+		   config_value(data, "mysql user", CONFIG_USER_DEFAULT),
+		   config_value(data, "mysql password", CONFIG_PASS_DEFAULT),
+		   config_value(data, "mysql database", CONFIG_DB_DEFAULT),
+		   xatol(config_value(data, "mysql port", CONFIG_PORT_DEFAULT))));
+
+	/* Do the mysql initialization */
+	data->handle = mysql_init(NULL);
+	if (!data->handle) {
+		DEBUG(0, ("Failed to connect to server\n"));
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+	/* Process correct entry in $HOME/.my.conf */
+	if (!mysql_real_connect(data->handle,
+			config_value(data, "mysql host", CONFIG_HOST_DEFAULT),
+			config_value(data, "mysql user", CONFIG_USER_DEFAULT),
+			config_value(data, "mysql password", CONFIG_PASS_DEFAULT),
+			config_value(data, "mysql database", CONFIG_DB_DEFAULT),
+			xatol(config_value (data, "mysql port", CONFIG_PORT_DEFAULT)), 
+			NULL, 0)) {
+		DEBUG(0,
+			  ("Failed to connect to mysql database: error: %s\n",
+			   mysql_error(data->handle)));
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+	
+	DEBUG(5, ("Connected to mysql db\n"));
+
+	return NT_STATUS_OK;
+}