为Postfix增加验证模块

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1.创建数据库和表：

create database postfix;

create table users(id int(11) NOT NULL  primary key AUTO_INCREMENT,username varchar(30) not null,password varchar(30) not null)；

create user postfix@localhost identified by '*';

grant all privileges on postfix.* to postfix@localhost identified by '*';

2.Cyrus SASL的配置文件smtpd.conf 如下：

pwcheck_method: auxprop
auxprop_plugin: sql
mech_list: PLAIN LOGIN
log_level: 3
allow_plaintext: true
sql_engine: mysql
sql_hostnames: 127.0.0.1
sql_user:postfix
sql_passwd:*
sql_database:postfix
sql_select: SELECT password FROM users WHERE username='%u';

参考自：http://www.postfix.org/SASL_README.html#auxprop_sql

3.Postfix的配置文件main.cf中加入对Cyrus SASL的支持，如下：

broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated,reject_invalid_hostname,reject_non_fqdn_hostname,reject_unknown_sender_domain,reject_non_fqdn_sender,reject_non_fqdn_recipient,reject_unknown_recipient_domain,reject_unauth_pipelining, reject_unauth_destination, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
smtpd_sasl_application_name = smtpd
smtpd_banner = Welcome to our $myhostname ESMTP, Warning:Versionnot Available!

4.在create.php中加入以下内容：

最开始加入以下变量定义：

$mysql_server_name='localhost';
$mysql_username='postfix';
$mysql_password='*';
$mysql_database='postfix';

在表示用户创建成功的if($userid) 后边加入以下语句：

                                $user=$params['username'];
                                $pwd=$params['password'];
                                $conn=mysql_connect($mysql_server_name,$mysql_username,$mysql_password,$mysql_database);
                                if (!$conn) {
                                                error_log("mysql connected error!");
                                }
                                mysql_select_db($mysql_database,$conn);                          
                                $sql="insert into users (username,password) values ('$user','$pwd')";
                                if (!mysql_query($sql,$conn))
                                {
                                        error_log('Error: ' . mysql_error());
                                }

                                mysql_close($conn);

5.在edit.php中加入以下内容：

最开始加入以下变量定义：

$mysql_server_name='localhost';
$mysql_username='postfix';
$mysql_password='*';
$mysql_database='postfix';

在表示用户编辑成功的if($result) 后边加入以下语句：

                        if($params['password']!=''){
                                $user=$params['username'];
                                $pwd=$params['password'];
                                $conn=mysql_connect($mysql_server_name,$mysql_username,$mysql_password,$mysql_database);
                                if (!$conn)
                                {
                                     error_log("mysql connected error!");
                                }
                                mysql_select_db($mysql_database,$conn);
                                $sql="update users set password='$pwd' where username='$user'";
                                if (!mysql_query($sql,$conn))
                                {
                                     error_log('Error: ' . mysql_error());
                                }
                                mysql_close($conn);
                        }

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