OAuth in PHP: Create an authorization code authorization server

OAuth in PHP: Create an Authorization Code Authorization Server

OAuth is an open standard for authorizing third-party applications to access user resources. It is built on the HTTP protocol, which isolates users from the resource server and implements a more secure and reliable authorization process. This article will introduce how to create an authorization code authorization server in PHP.

Authorization code authorization is the most commonly used authorization type in OAuth2. Its workflow is as follows:

1. The client initiates an authorization request to the authorization server.
2. The authorization server verifies the user's identity and requests authorization from the user.
3. After the user agrees to the authorization, the authorization server issues the authorization code to the client.
4. The client uses the authorization code, client ID, client key and other information to request a token from the authorization server.
5. The authorization server verifies the client information and authorization code, and issues an access token.
6. The client uses the access token to request access to the user's resources from the resource server.

First, we need to install a popular PHP OAuth2 library, such as "bshaffer/oauth2-server-php". This library can be added to your project using Composer.

composer require bshaffer/oauth2-server-php

Next, we create an index.php file as our authorization code authorization server:

<?php
require_once 'vendor/autoload.php';

// 创建一个PDO实例
$dsn = "mysql:dbname=testdb;host=localhost";
$username = "root";
$password = "";
$pdo = new PDO($dsn, $username, $password);

// 创建一个存储库实例
$storage = new OAuth2StoragePdo($pdo);

// 创建一个授权服务器实例
$server = new OAuth2Server($storage);

// 添加支持的授权类型
$server->addGrantType(new OAuth2GrantTypeAuthorizationCode($storage));

// 处理授权请求
$request = OAuth2Request::createFromGlobals();
$response = new OAuth2Response();
if (!$server->validateAuthorizeRequest($request, $response)) {
    $response->send();
    die;
}
// 显示授权页面
if (empty($_POST)) {
    exit('
        <form method="post">
          <label for="username">Username:</label>
          <input type="text" id="username" name="username"><br><br>
          <label for="password">Password:</label>
          <input type="password" id="password" name="password"><br><br>
          <input type="submit" value="Authorize">
        </form>
    ');
}

// 处理授权请求
$is_authorized = ($_POST['username'] == 'admin' && $_POST['password'] == 'admin');
$server->handleAuthorizeRequest($request, $response, $is_authorized);
if ($is_authorized) {
    $response->send();
} else {
    echo '授权失败';
}

Next, we need to create a database table for storing client information. Execute the following SQL statement in the MySQL database:

CREATE TABLE `oauth_clients` (
  `client_id` varchar(80) COLLATE utf8_unicode_ci NOT NULL,
  `client_secret` varchar(80) COLLATE utf8_unicode_ci NOT NULL,
  `redirect_uri` varchar(2000) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
  `grant_types` varchar(80) COLLATE utf8_unicode_ci DEFAULT NULL,
  `scope` varchar(100) COLLATE utf8_unicode_ci DEFAULT NULL,
  `user_id` varchar(80) COLLATE utf8_unicode_ci DEFAULT NULL,
  PRIMARY KEY (`client_id`)
);

Now, we can use the authorization code to authorize the server for testing.

Visit http://localhost/index.php?response_type=code&client_id=YOUR_CLIENT_ID&redirect_uri=YOUR_REDIRECT_URI&scope=SCOPE in your browser and replace YOUR_CLIENT_ID with your client End ID, replace YOUR_REDIRECT_URI with your redirect URI, and SCOPE with the resource scope you want to access.

The authorization server will ask you to enter your username and password. In this example, the username and password are both "admin". After entering the correct username and password, you will receive an authorization code in response.

Next, we can use the authorization code to request an access token from the authorization server. Use curl or another HTTP client to make the following request:

curl -X POST -d "grant_type=authorization_code&code=AUTHORIZATION_CODE&client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET&redirect_uri=YOUR_REDIRECT_URI" http://localhost/token.php

Replace AUTHORIZATION_CODE with the authorization code you received, YOUR_CLIENT_ID , YOUR_CLIENT_SECRET and YOUR_REDIRECT_URI are replaced with your client ID, client secret, and redirect URI.

If everything is OK, you will receive an access token in response.

The above are the detailed steps for creating an authorization code authorization server in PHP. Using OAuth can provide a more secure and reliable authorization process, protecting user data and privacy. Hope this article can help you understand and use OAuth authorization.

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