# HG changeset patch
# User Timo Sirainen <tss@iki.fi>
# Date 1047670139 -7200
# Node ID a9ac5865daf8dc422f6dd49e611831d01c68778c
# Parent  cc9b61b9959e45bc3889fe5e9b943a5b63beddd7
Whops, forgot to add.

diff -r cc9b61b9959e -r a9ac5865daf8 src/auth/db-pgsql.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/auth/db-pgsql.c	Fri Mar 14 21:28:59 2003 +0200
@@ -0,0 +1,173 @@
+/* Copyright (C) 2003 Alex Howansky, Timo Sirainen */
+
+#include "config.h"
+#undef HAVE_CONFIG_H
+
+#if defined(PASSDB_PGSQL) || defined(USERDB_PGSQL)
+
+#include "common.h"
+#include "network.h"
+#include "str.h"
+#include "settings.h"
+#include "db-pgsql.h"
+
+#include <stddef.h>
+
+#define DEF(type, name) { type, #name, offsetof(struct pgsql_settings, name) }
+
+static struct setting_def setting_defs[] = {
+	DEF(SET_STR, connect),
+	DEF(SET_STR, password_query),
+	DEF(SET_STR, user_query),
+	DEF(SET_STR, allowed_chars),
+	DEF(SET_STR, default_pass_scheme)
+};
+
+struct pgsql_settings default_pgsql_settings = {
+	MEMBER(connect) "dbname=virtual user=virtual",
+	MEMBER(password_query) "SELECT password FROM users WHERE userid = '%u'",
+	MEMBER(user_query) "SELECT home, uid, gid FROM users WHERE userid = '%u'",
+	MEMBER(allowed_chars) "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-@",
+	MEMBER(default_pass_scheme) "PLAIN-MD5"
+};
+
+static struct pgsql_connection *pgsql_connections = NULL;
+
+static int pgsql_conn_open(struct pgsql_connection *conn);
+static void pgsql_conn_close(struct pgsql_connection *conn);
+
+int db_pgsql_is_valid_username(struct pgsql_connection *conn,
+			       const char *username)
+{
+	const char *p;
+
+	for (p = username; *p != '\0'; p++) {
+		if (strchr(conn->set.allowed_chars, *p) == NULL)
+			return FALSE;
+	}
+
+	return TRUE;
+}
+
+void db_pgsql_query(struct pgsql_connection *conn, const char *query,
+		    struct pgsql_request *request)
+{
+	PGresult *res;
+	int failed;
+
+	if (!conn->connected) {
+		if (!pgsql_conn_open(conn)) {
+			request->callback(conn, request, NULL);
+			return;
+		}
+	}
+
+	if (verbose_debug)
+		i_info("PGSQL: Performing query: %s", query);
+
+	res = PQexec(conn->pg, query);
+
+	if (PQresultStatus(res) != PGRES_TUPLES_OK) {
+		i_error("PGSQL: Query \"%s\" failed: %s",
+			query, PQresultErrorMessage(res));
+		failed = TRUE;
+	} else if (PQntuples(res) != 1) {
+		i_error("PGSQL: Query \"%s\" returned %d rows",
+			query, PQntuples(res));
+		failed = TRUE;
+	} else {
+		failed = FALSE;
+	}
+
+	request->callback(conn, request, failed ? NULL : res);
+	PQclear(res);
+
+}
+
+static int pgsql_conn_open(struct pgsql_connection *conn)
+{
+	if (conn->connected)
+		return TRUE;
+
+	if (conn->pg == NULL) {
+		conn->pg = PQconnectdb(conn->set.connect);
+		if (PQstatus(conn->pg) != CONNECTION_OK) {
+			i_error("PGSQL: Can't connect to database %s",
+				conn->set.connect);
+			return FALSE;
+		}
+	}
+
+	conn->connected = TRUE;
+	return TRUE;
+}
+
+static void pgsql_conn_close(struct pgsql_connection *conn)
+{
+	conn->connected = FALSE;
+
+	if (conn->pg != NULL) {
+		PQfinish(conn->pg);
+		conn->pg = NULL;
+	}
+}
+
+static struct pgsql_connection *pgsql_conn_find(const char *config_path)
+{
+	struct pgsql_connection *conn;
+
+	for (conn = pgsql_connections; conn != NULL; conn = conn->next) {
+		if (strcmp(conn->config_path, config_path) == 0)
+			return conn;
+	}
+
+	return NULL;
+}
+
+static const char *parse_setting(const char *key, const char *value,
+				 void *context)
+{
+	struct pgsql_connection *conn = context;
+
+	return parse_setting_from_defs(conn->pool, setting_defs,
+				       &conn->set, key, value);
+}
+
+struct pgsql_connection *db_pgsql_init(const char *config_path)
+{
+	struct pgsql_connection *conn;
+	pool_t pool;
+
+	conn = pgsql_conn_find(config_path);
+	if (conn != NULL) {
+		conn->refcount++;
+		return conn;
+	}
+
+	pool = pool_alloconly_create("pgsql_connection", 1024);
+	conn = p_new(pool, struct pgsql_connection, 1);
+	conn->pool = pool;
+
+	conn->refcount = 1;
+
+	conn->config_path = p_strdup(pool, config_path);
+	conn->set = default_pgsql_settings;
+	settings_read(config_path, parse_setting, conn);
+
+	(void)pgsql_conn_open(conn);
+
+	conn->next = pgsql_connections;
+	pgsql_connections = conn;
+	return conn;
+}
+
+void db_pgsql_unref(struct pgsql_connection *conn)
+{
+	if (--conn->refcount > 0)
+		return;
+
+	pgsql_conn_close(conn);
+	pool_unref(conn->pool);
+}
+
+#endif
diff -r cc9b61b9959e -r a9ac5865daf8 src/auth/db-pgsql.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/auth/db-pgsql.h	Fri Mar 14 21:28:59 2003 +0200
@@ -0,0 +1,49 @@
+#ifndef __DB_PGSQL_H
+#define __DB_PGSQL_H
+
+#include <libpq-fe.h>
+
+struct pgsql_connection;
+struct pgsql_request;
+
+typedef void pgqsl_query_callback_t(struct pgsql_connection *conn,
+				    struct pgsql_request *request,
+				    PGresult *res);
+
+struct pgsql_settings {
+	const char *connect;
+	const char *password_query;
+	const char *user_query;
+	const char *allowed_chars;
+	const char *default_pass_scheme;
+};
+
+struct pgsql_connection {
+	struct pgsql_connection *next;
+
+	pool_t pool;
+	int refcount;
+
+	char *config_path;
+	struct pgsql_settings set;
+
+	PGconn *pg;
+
+	unsigned int connected:1;
+};
+
+struct pgsql_request {
+	pgqsl_query_callback_t *callback;
+	void *context;
+};
+
+int db_pgsql_is_valid_username(struct pgsql_connection *conn,
+			       const char *username);
+
+void db_pgsql_query(struct pgsql_connection *conn, const char *query,
+		    struct pgsql_request *request);
+
+struct pgsql_connection *db_pgsql_init(const char *config_path);
+void db_pgsql_unref(struct pgsql_connection *conn);
+
+#endif
diff -r cc9b61b9959e -r a9ac5865daf8 src/auth/passdb-pgsql.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/auth/passdb-pgsql.c	Fri Mar 14 21:28:59 2003 +0200
@@ -0,0 +1,173 @@
+/* Copyright (C) 2003 Alex Howansky, Timo Sirainen */
+
+#include "config.h"
+#undef HAVE_CONFIG_H
+
+#ifdef PASSDB_PGSQL
+
+#include "common.h"
+#include "str.h"
+#include "var-expand.h"
+#include "password-scheme.h"
+#include "db-pgsql.h"
+#include "passdb.h"
+
+#include <libpq-fe.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct passdb_pgsql_connection {
+	struct pgsql_connection *conn;
+};
+
+struct passdb_pgsql_request {
+	struct pgsql_request request;
+
+	enum passdb_credentials credentials;
+	union {
+		verify_plain_callback_t *verify_plain;
+                lookup_credentials_callback_t *lookup_credentials;
+	} callback;
+
+	char password[1];
+};
+
+static struct passdb_pgsql_connection *passdb_pgsql_conn;
+
+static void pgsql_handle_request(struct pgsql_connection *conn,
+				 struct pgsql_request *request, PGresult *res)
+{
+	struct passdb_pgsql_request *pgsql_request =
+		(struct passdb_pgsql_request *) request;
+	struct auth_request *auth_request = request->context;
+	const char *user, *password, *scheme;
+	int ret = 0;
+
+	user = auth_request->user;
+	password = NULL;
+
+	if (res != NULL) {
+		if (PQntuples(res) == 0) {
+			if (verbose)
+				i_info("pgsql(%s): Unknown user", user);
+		} else if (PQntuples(res) > 1) {
+			i_error("pgsql(%s): Multiple matches for user", user);
+		} else if (PQnfields(res) != 1) {
+			i_error("pgsql(%s): Password query returned "
+				"more than one field", user);
+		} else {
+			password = t_strdup(PQgetvalue(res, 0, 0));
+		}
+	}
+
+	scheme = password_get_scheme(&password);
+	if (scheme == NULL) {
+		scheme = conn->set.default_pass_scheme;
+		i_assert(scheme != NULL);
+	}
+
+	if (pgsql_request->credentials != -1) {
+		passdb_handle_credentials(pgsql_request->credentials,
+			user, password, scheme,
+			pgsql_request->callback.lookup_credentials,
+			auth_request);
+		return;
+	}
+
+	/* verify plain */
+	if (password == NULL) {
+		pgsql_request->callback.verify_plain(PASSDB_RESULT_USER_UNKNOWN,
+						     auth_request);
+		return;
+	}
+
+	ret = password_verify(pgsql_request->password, password,
+			      scheme, user);
+	if (ret < 0)
+		i_error("pgsql(%s): Unknown password scheme %s", user, scheme);
+	else if (ret == 0) {
+		if (verbose)
+			i_info("pgsql(%s): Password mismatch", user);
+	}
+
+	pgsql_request->callback.verify_plain(ret > 0 ? PASSDB_RESULT_OK :
+					     PASSDB_RESULT_PASSWORD_MISMATCH,
+					     auth_request);
+}
+
+static void pgsql_lookup_pass(struct auth_request *auth_request,
+			      struct pgsql_request *pgsql_request)
+{
+	struct pgsql_connection *conn = passdb_pgsql_conn->conn;
+	const char *query;
+	string_t *str;
+
+	str = t_str_new(512);
+	var_expand(str, conn->set.password_query, auth_request->user, NULL);
+	query = str_c(str);
+
+	pgsql_request->callback = pgsql_handle_request;
+	pgsql_request->context = auth_request;
+
+	if (db_pgsql_is_valid_username(conn, auth_request->user))
+		db_pgsql_query(conn, query, pgsql_request);
+	else {
+		if (verbose) {
+			i_error("pgsql(%s): Invalid username",
+				auth_request->user);
+		}
+		pgsql_handle_request(conn, pgsql_request, NULL);
+	}
+}
+
+static void
+pgsql_verify_plain(struct auth_request *request, const char *password,
+		   verify_plain_callback_t *callback)
+{
+	struct passdb_pgsql_request *pgsql_request;
+
+	pgsql_request = i_malloc(sizeof(struct passdb_pgsql_request) +
+				 strlen(password));
+	pgsql_request->credentials = -1;
+	pgsql_request->callback.verify_plain = callback;
+	strcpy(pgsql_request->password, password);
+
+	pgsql_lookup_pass(request, &pgsql_request->request);
+}
+
+static void pgsql_lookup_credentials(struct auth_request *request,
+				     enum passdb_credentials credentials,
+				     lookup_credentials_callback_t *callback)
+{
+	struct passdb_pgsql_request *pgsql_request;
+
+	pgsql_request = i_new(struct passdb_pgsql_request, 1);
+	pgsql_request->credentials = credentials;
+	pgsql_request->callback.lookup_credentials = callback;
+
+        pgsql_lookup_pass(request, &pgsql_request->request);
+}
+
+static void passdb_pgsql_init(const char *args)
+{
+	struct pgsql_connection *conn;
+
+	passdb_pgsql_conn = i_new(struct passdb_pgsql_connection, 1);
+	passdb_pgsql_conn->conn = conn = db_pgsql_init(args);
+}
+
+static void passdb_pgsql_deinit(void)
+{
+	db_pgsql_unref(passdb_pgsql_conn->conn);
+	i_free(passdb_pgsql_conn);
+}
+
+struct passdb_module passdb_pgsql = {
+	passdb_pgsql_init,
+	passdb_pgsql_deinit,
+
+	pgsql_verify_plain,
+	pgsql_lookup_credentials
+};
+
+#endif
diff -r cc9b61b9959e -r a9ac5865daf8 src/auth/userdb-pgsql.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/auth/userdb-pgsql.c	Fri Mar 14 21:28:59 2003 +0200
@@ -0,0 +1,125 @@
+/* Copyright (C) 2003 Alex Howansky, Timo Sirainen */
+
+#include "config.h"
+#undef HAVE_CONFIG_H
+
+#ifdef USERDB_PGSQL
+
+#include "common.h"
+#include "str.h"
+#include "var-expand.h"
+#include "db-pgsql.h"
+#include "userdb.h"
+
+#include <libpq-fe.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct userdb_pgsql_connection {
+	struct pgsql_connection *conn;
+};
+
+struct userdb_pgsql_request {
+	struct pgsql_request request;
+	userdb_callback_t *userdb_callback;
+};
+
+static struct userdb_pgsql_connection *userdb_pgsql_conn;
+
+static int is_result_valid(PGresult *res)
+{
+	if (PQresultStatus(res) != PGRES_TUPLES_OK) {
+		i_error("PGSQL: Query failed");
+		return FALSE;
+	}
+
+	if (PQntuples(res) == 0) {
+		if (verbose)
+			i_error("PGSQL: Authenticated user not found");
+		return FALSE;
+	}
+
+	if (PQfnumber(res, "home") == -1) {
+		i_error("PGSQL: User query did not return 'home' field");
+		return FALSE;
+	}
+
+	if (PQfnumber(res, "uid") == -1) {
+		i_error("PGSQL: User query did not return 'uid' field");
+		return FALSE;
+	}
+
+	if (PQfnumber(res, "gid") == -1) {
+		i_error("PGSQL: User query did not return 'gid' field");
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+static void pgsql_handle_request(struct pgsql_connection *conn __attr_unused__,
+				 struct pgsql_request *request, PGresult *res)
+{
+	struct userdb_pgsql_request *urequest =
+		(struct userdb_pgsql_request *) request;
+	struct user_data user;
+
+	if (res != NULL && is_result_valid(res)) {
+		memset(&user, 0, sizeof(user));
+		user.home = PQgetvalue(res, 0, PQfnumber(res, "home"));
+		user.uid = atoi(PQgetvalue(res, 0, PQfnumber(res, "uid")));
+		user.gid = atoi(PQgetvalue(res, 0, PQfnumber(res, "gid")));
+		urequest->userdb_callback(&user, request->context);
+	} else {
+		urequest->userdb_callback(NULL, request->context);
+	}
+}
+
+static void userdb_pgsql_lookup(const char *user, userdb_callback_t *callback,
+				void *context)
+{
+	struct pgsql_connection *conn = userdb_pgsql_conn->conn;
+	struct userdb_pgsql_request *request;
+	const char *query;
+	string_t *str;
+
+	str = t_str_new(512);
+	var_expand(str, conn->set.user_query, user, NULL);
+	query = str_c(str);
+
+	request = i_new(struct userdb_pgsql_request, 1);
+	request->request.callback = pgsql_handle_request;
+	request->request.context = context;
+	request->userdb_callback = callback;
+
+	if (db_pgsql_is_valid_username(conn, user))
+		db_pgsql_query(conn, query, &request->request);
+	else {
+		if (verbose)
+			i_info("pgsql(%s): Invalid username", user);
+		pgsql_handle_request(conn, &request->request, NULL);
+	}
+}
+
+static void userdb_pgsql_init(const char *args)
+{
+	struct pgsql_connection *conn;
+
+	userdb_pgsql_conn = i_new(struct userdb_pgsql_connection, 1);
+	userdb_pgsql_conn->conn = conn = db_pgsql_init(args);
+}
+
+static void userdb_pgsql_deinit(void)
+{
+	db_pgsql_unref(userdb_pgsql_conn->conn);
+	i_free(userdb_pgsql_conn);
+}
+
+struct userdb_module userdb_pgsql = {
+	userdb_pgsql_init,
+	userdb_pgsql_deinit,
+
+	userdb_pgsql_lookup
+};
+
+#endif