emqtt 试用（五）emq 的用户密码认证

MQTT 认证设置

EMQ 消息服务器认证由一系列认证插件(Plugin)提供，系统支持按用户名密码、ClientID 或匿名认证。

系统默认开启匿名认证(anonymous)，通过加载认证插件可开启的多个认证模块组成认证链:

           ----------------           ----------------           ------------
Client --> | Username认证 | -ignore-> | ClientID认证 | -ignore-> | 匿名认证 |
           ----------------           ----------------           ------------
                  |                         |                         |
                 \|/                       \|/                       \|/
            allow | deny              allow | deny              allow | deny

注解

EMQ 2.0 消息服务器还提供了 MySQL、PostgreSQL、Redis、MongoDB、HTTP、LDAP 认证插件。

开启匿名认证

etc/emq.conf 配置启用匿名认证:

## Allow Anonymous authentication
mqtt.allow_anonymous = true

EMQ 2.0 版本提供的认证插件包括:

插件	说明
emq_auth_clientid	ClientId 认证/鉴权插件
emq_auth_username	用户名密码认证/鉴权插件
emq_auth_ldap	LDAP 认证/鉴权插件
emq_auth_http	HTTP 认证/鉴权插件
emq_auth_mysql	MySQ L认证/鉴权插件
emq_auth_pgsql	Postgre 认证/鉴权插件
emq_auth_redis	Redis 认证/鉴权插件
emq_auth_mongo	MongoDB 认证/鉴权插件

用户名密码认证

基于 MQTT 登录用户名(username)、密码(password)认证。

etc/plugins/emq_auth_username.conf 中配置默认用户:

auth.user.$N.username = admin
auth.user.$N.password = public

启用 emq_auth_username 插件:

./bin/emqttd_ctl plugins load emq_auth_username

使用 ./bin/emqttd_ctl users 命令添加用户:

$ ./bin/emqttd_ctl users add <Username> <Password>

ClientId 认证

基于 MQTT 客户端 ID 认证。

etc/plugins/emq_auth_clientid.conf:

auth.client.$N.clientid = clientid
auth.client.$N.password = passwd

启用 emq_auth_clientid 插件:

./bin/emqttd_ctl plugins load emq_auth_clientid

LDAP 插件认证

etc/plugins/emq_auth_ldap.conf 配置 LDAP 参数:

auth.ldap.servers = 127.0.0.1
 
auth.ldap.port = 389
 
auth.ldap.timeout = 30
 
auth.ldap.user_dn = uid=%u,ou=People,dc=example,dc=com
 
auth.ldap.ssl = false

启用 LDAP 认证插件:

./bin/emqttd_ctl plugins load emq_auth_ldap

HTTP 插件认证

注解

开启 HTTP 认证插件后，会终结认证链

etc/plugins/emq_auth_http.conf 配置 ‘super_req’, ‘auth_req’:

## Variables: %u = username, %c = clientid, %a = ipaddress, %P = password, %t = topic
 
auth.http.auth_req = http://127.0.0.1:8080/mqtt/auth
auth.http.auth_req.method = post
auth.http.auth_req.params = clientid=%c,username=%u,password=%P
 
auth.http.super_req = http://127.0.0.1:8080/mqtt/superuser
auth.http.super_req.method = post
auth.http.super_req.params = clientid=%c,username=%u

启用 HTTP 认证插件:

./bin/emqttd_ctl plugins load emq_auth_http

MySQL 插件认证

通过 MySQL 数据库表认证，可创建如下的 ‘mqtt_user’ 表:

CREATE TABLE `mqtt_user` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `username` varchar(100) DEFAULT NULL,
  `password` varchar(100) DEFAULT NULL,
  `salt` varchar(20) DEFAULT NULL,
  `is_superuser` tinyint(1) DEFAULT 0,
  `created` datetime DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `mqtt_username` (`username`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

etc/plugins/emq_auth_mysql.conf 配置 ‘super_query’, ‘auth_query’, ‘password_hash’:

## Mysql Server
auth.mysql.server = 127.0.0.1:3306
 
## Mysql Pool Size
auth.mysql.pool = 8
 
## Mysql Username
## auth.mysql.username =
 
## Mysql Password
## auth.mysql.password =
 
## Mysql Database
auth.mysql.database = mqtt
 
## Variables: %u = username, %c = clientid
 
## Authentication Query: select password only
auth.mysql.auth_query = select password from mqtt_user where username = '%u' limit 1
 
## Password hash: plain, md5, sha, sha256, pbkdf2
auth.mysql.password_hash = sha256
 
## %% Superuser Query
auth.mysql.super_query = select is_superuser from mqtt_user where username = '%u' limit 1

注解

如果系统已有MQTT认证表，可通过配置’auth_query’查询语句集成。

启用 MySQL 认证插件:

./bin/emqttd_ctl plugins load emq_auth_mysql

Postgre 插件认证

通过 PostgreSQL 数据库表认证，可创建如下的 ‘mqtt_user’ 表:

CREATE TABLE mqtt_user (
  id SERIAL primary key,
  is_superuser boolean,
  username character varying(100),
  password character varying(100),
  salt character varying(40)
);

etc/plugins/emq_auth_pgsql.conf 配置 ‘auth_query’、’password_hash’:

## Postgre Server
auth.pgsql.server = 127.0.0.1:5432
 
auth.pgsql.pool = 8
 
auth.pgsql.username = root
 
#auth.pgsql.password =
 
auth.pgsql.database = mqtt
 
auth.pgsql.encoding = utf8
 
auth.pgsql.ssl = false
 
## Variables: %u = username, %c = clientid, %a = ipaddress
 
## Authentication Query: select password only
auth.pgsql.auth_query = select password from mqtt_user where username = '%u' limit 1
 
## Password hash: plain, md5, sha, sha256, pbkdf2
auth.pgsql.password_hash = sha256
 
## sha256 with salt prefix
## auth.pgsql.password_hash = salt sha256
 
## sha256 with salt suffix
## auth.pgsql.password_hash = sha256 salt
 
## Superuser Query
auth.pgsql.super_query = select is_superuser from mqtt_user where username = '%u' limit 1

启用 Postgre 认证插件:

./bin/emqttd_ctl plugins load emq_auth_pgsql

Redis 插件认证

Redis 认证。MQTT 用户记录存储在 Redis Hash, 键值: “mqtt_user:<Username>”

etc/plugins/emq_auth_redis.conf 设置 ‘super_cmd’、’auth_cmd’、’password_hash’:

## Redis Server
auth.redis.server = 127.0.0.1:6379
 
## Redis Pool Size
auth.redis.pool = 8
 
## Redis Database
auth.redis.database = 0
 
## Redis Password
## auth.redis.password =
 
## Variables: %u = username, %c = clientid
 
## Authentication Query Command
auth.redis.auth_cmd = HGET mqtt_user:%u password
 
## Password hash: plain, md5, sha, sha256, pbkdf2
auth.redis.password_hash = sha256
 
## Superuser Query Command
auth.redis.super_cmd = HGET mqtt_user:%u is_superuser

启用 Redis 认证插件:

./bin/emqttd_ctl plugins load emq_auth_redis

MongoDB 插件认证

按 MongoDB 用户集合认证，例如创建 ‘mqtt_user’ 集合:

{
    username: "user",
    password: "password hash",
    is_superuser: boolean (true, false),
    created: "datetime"
}

etc/plugins/emq_auth_mongo.conf 设置 ‘super_query’、’auth_query’:

## Mongo Server
auth.mongo.server = 127.0.0.1:27017
 
## Mongo Pool Size
auth.mongo.pool = 8
 
## Mongo User
## auth.mongo.user =
 
## Mongo Password
## auth.mongo.password =
 
## Mongo Database
auth.mongo.database = mqtt
 
## auth_query
auth.mongo.auth_query.collection = mqtt_user
 
auth.mongo.auth_query.password_field = password
 
auth.mongo.auth_query.password_hash = sha256
 
auth.mongo.auth_query.selector = username=%u
 
## super_query
auth.mongo.super_query.collection = mqtt_user
 
auth.mongo.super_query.super_field = is_superuser
 
auth.mongo.super_query.selector = username=%u

启用 MongoDB 认证插件:

./bin/emqttd_ctl plugins load emq_auth_mongo