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83 lines
3.0 KiB
Markdown
83 lines
3.0 KiB
Markdown
# Authentication
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When you have a multiplayer game, often you need to store information about your player for later games, keep game stats or communicate with your friends. For all these use cases, you often need a way to uniquely identify a user. Being able to tell users apart is called authentication. There are several methods available, some examples include:
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- Ask the user for username and password
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- Use a third party oath or OpenID identity provider, such as Facebook, Twitter, Google
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- Use a third party service such as PlayFab, GameLift or Steam
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- Use the device id, very popular method in mobile
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- Use Google Play in Android
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- Use Game Center in IOS
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- Use a web service in your website
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Trying to write a comprehensive authentication framework that cover all these is very complex. There is no one size fit all, and we would quickly end up with bloated code.
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Instead, **Mirror does not perform authentication**, but we provide hooks you can use to implement any of these.
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Here is an example of how to implement simple username/password authentication:
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1. Select your `NetworkManager` game object in the unity editor.
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2. In the inspector, under `Spawn Info`, disable `Auto Create Player`
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3. Call `AddPlayer` in your client to pass the credentials.
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4. Override the `OnServerAddPlayer` method and validate the user's credential.
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For example this would be part of your `NetworkManager` class:
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``` cs
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class MyGameNetworkManager : NetworkManager {
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class CredentialsMessage : MessageBase
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{
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// use whatever credentials make sense for your game
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// for example, you might want to pass the accessToken if using oauth
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public string username;
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public string password;
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}
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// this gets called on the client after it has connected to the server
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public override void OnClientConnect(NetworkConnection conn)
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{
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base.OnClientConnect(conn);
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CredentialsMessage msg = new CredentialsMessage()
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{
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// perhaps get the username and password from textboxes instead
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username = "Joe",
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password = "Gaba Gaba"
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};
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ClientScene.AddPlayer(conn, MessagePacker.Pack(msg));
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}
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// this gets called in your server when the client requests to add a player.
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public override void OnServerAddPlayer(NetworkConnection conn, AddPlayerMessage extraMessage)
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{
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CredentialsMessage msg = MessagePacker.Unpack<CredentialsMessage>(extraMessage.value);
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// check the credentials by calling your web server, database table, playfab api, or any method appropriate.
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if (msg.username == "Joe" && msg.password == "Gaba Gaba")
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{
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// proceed to regular add player
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base.OnServerAddPlayer(conn, extraMessage);
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}
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else
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{
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conn.Disconnect();
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}
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}
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}
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```
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## Warning
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By default Mirror uses Telepathy, which is not encrypted. The above code sample works, but if you want to do authentication through Mirror, we highly recommend you use a transport that supports encryption.
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