laravel修改用戶模塊的密碼驗證實現(xiàn)
做項目的時候，用戶認(rèn)證幾乎是必不可少的，如果我們的項目由于一些原因不得不使用 users 之外的用戶表進(jìn)行認(rèn)證，那么就需要多做一點工作來完成這個功能。
現(xiàn)在假設(shè)我們只需要修改登錄用戶的表，表名和表結(jié)構(gòu)都與框架默認(rèn)的表users不同，文檔沒有教我們?nèi)绾稳プ?，但是別慌，稍微看下框架實現(xiàn)用戶認(rèn)證的源碼就能輕松實現(xiàn)。
首先，自定義一張表用來登錄，表結(jié)構(gòu)和模擬數(shù)據(jù)如下：
表 admins
| id | login_name | login_pass |
|---|---|---|
| 1 | admin | 10$2MUhp7b6ghVOngb/.b/x6uuEW/yL3FqPKJztawrM0U577Clf07xda |
從配置文件入手
用戶認(rèn)證相關(guān)的配置都保存在config/auth.php文件中，先來看看配置文件的內(nèi)容：
<?php
return [
/*
|--------------------------------------------------------------------------
| Authentication Defaults
|--------------------------------------------------------------------------
|
| This option controls the default authentication "guard" and password
| reset options for your application. You may change these defaults
| as required, but they're a perfect start for most applications.
|
*/
'defaults' => [
'guard' => 'web',
'passwords' => 'users',
],
/*
|--------------------------------------------------------------------------
| Authentication Guards
|--------------------------------------------------------------------------
|
| Next, you may define every authentication guard for your application.
| Of course, a great default configuration has been defined for you
| here which uses session storage and the Eloquent user provider.
|
| All authentication drivers have a user provider. This defines how the
| users are actually retrieved out of your database or other storage
| mechanisms used by this application to persist your user's data.
|
| Supported: "session", "token"
|
*/
'guards' => [
'web' => [
'driver' => 'session',
'provider' => 'users',
],
'api' => [
'driver' => 'passport',
'provider' => 'users',
],
],
/*
|--------------------------------------------------------------------------
| User Providers
|--------------------------------------------------------------------------
|
| All authentication drivers have a user provider. This defines how the
| users are actually retrieved out of your database or other storage
| mechanisms used by this application to persist your user's data.
|
| If you have multiple user tables or models you may configure multiple
| sources which represent each model / table. These sources may then
| be assigned to any extra authentication guards you have defined.
|
| Supported: "database", "eloquent"
|
*/
'providers' => [
'users' => [
'driver' => 'eloquent',
'model' => App\User::class,
],
// 'users' => [
// 'driver' => 'database',
// 'table' => 'users',
// ],
],
/*
|--------------------------------------------------------------------------
| Resetting Passwords
|--------------------------------------------------------------------------
|
| You may specify multiple password reset configurations if you have more
| than one user table or model in the application and you want to have
| separate password reset settings based on the specific user types.
|
| The expire time is the number of minutes that the reset token should be
| considered valid. This security feature keeps tokens short-lived so
| they have less time to be guessed. You may change this as needed.
|
*/
'passwords' => [
'users' => [
'provider' => 'users',
'table' => 'password_resets',
'expire' => 60,
],
],
];
默認(rèn)使用的守衛(wèi)是web，而web守衛(wèi)使用的認(rèn)證驅(qū)動是session，用戶提供器是users。假設(shè)我們的需求只是將用戶的提供器由users改為admins，那么我們需要做兩步操作：
修改默認(rèn)的用戶提供器，將provider=>'users'改為provider=>'admins'
'guards' => [
'web' => [
'driver' => 'session',
'provider' => 'users',
],
],
配置admins提供器，假設(shè)依舊使用eloquent作為驅(qū)動，并創(chuàng)建好了admins表的模型
'providers' => [
'admins' => [
'driver' => 'eloquent',
'model' => App\Admin::class
]
],
使用Auth門面的attempt方法進(jìn)行登錄
SessionGuard 中的attempt方法：
//Illuminate\Auth\SessionGuard
public function attempt(array $credentials = [], $remember = false)
{
$this->fireAttemptEvent($credentials, $remember);
$this->lastAttempted = $user = $this->provider->retrieveByCredentials($credentials);
// If an implementation of UserInterface was returned, we'll ask the provider
// to validate the user against the given credentials, and if they are in
// fact valid we'll log the users into the application and return true.
if ($this->hasValidCredentials($user, $credentials)) {
$this->login($user, $remember);
return true;
}
// If the authentication attempt fails we will fire an event so that the user
// may be notified of any suspicious attempts to access their account from
// an unrecognized user. A developer may listen to this event as needed.
$this->fireFailedEvent($user, $credentials);
return false;
}
該方法中調(diào)用 UserProvider 接口的retrieveByCredentials方法檢索用戶，根據(jù)我們的配置，UserProvider接口的具體實現(xiàn)應(yīng)該是EloquentUserProvider，因此，我們定位到EloquentUserProvider的retrieveByCredentials方法：
//Illuminate\Auth\EloquentUserProvider
public function retrieveByCredentials(array $credentials)
{
if (empty($credentials) ||
(count($credentials) === 1 &&
array_key_exists('password', $credentials))) {
return;
}
// First we will add each credential element to the query as a where clause.
// Then we can execute the query and, if we found a user, return it in a
// Eloquent User "model" that will be utilized by the Guard instances.
$query = $this->createModel()->newQuery();
foreach ($credentials as $key => $value) {
if (Str::contains($key, 'password')) {
continue;
}
if (is_array($value) || $value instanceof Arrayable) {
$query->whereIn($key, $value);
} else {
$query->where($key, $value);
}
}
return $query->first();
}
該方法會使用傳入的參數(shù)（不包含password）到我們配置的數(shù)據(jù)表中搜索數(shù)據(jù)，查詢到符合條件的數(shù)據(jù)之后返回對應(yīng)的用戶信息，然后attempt方法會進(jìn)行密碼校驗，校驗密碼的方法為：
//Illuminate\Auth\SessionGuard
/**
* Determine if the user matches the credentials.
*
* @param mixed $user
* @param array $credentials
* @return bool
*/
protected function hasValidCredentials($user, $credentials)
{
return ! is_null($user) && $this->provider->validateCredentials($user, $credentials);
}
進(jìn)一步查看EloquentUserProvider中的validateCredentials方法
//Illuminate\Auth\EloquentUserProvider
public function validateCredentials(UserContract $user, array $credentials)
{
$plain = $credentials['password'];
return $this->hasher->check($plain, $user->getAuthPassword());
}
通過validateCredentials可以看出，提交的認(rèn)證數(shù)據(jù)中密碼字段名必須是password，這個無法自定義。同時可以看到，入?yún)?user必須實現(xiàn)Illuminate\Contracts\Auth\Authenticatable接口（UserContract是別名）。
修改 Admin 模型
Admin模型必須實現(xiàn)Illuminate\Contracts\Auth\Authenticatable接口，可以借鑒一下User模型，讓Admin直接繼承Illuminate\Foundation\Auth\User 就可以，然后重寫getAuthPassword方法，正確獲取密碼字段：
// App\Admin
public function getAuthPassword()
{
return $this->login_pass;
}
不出意外的話，這個時候就能使用admins表進(jìn)行登錄了。
Larval 5.4的默認(rèn)Auth登陸傳入郵件和用戶密碼到attempt 方法來認(rèn)證，通過email 的值獲取，如果用戶被找到，經(jīng)哈希運算后存儲在數(shù)據(jù)中的password將會和傳遞過來的經(jīng)哈希運算處理的passwrod值進(jìn)行比較。如果兩個經(jīng)哈希運算的密碼相匹配那么將會為這個用戶開啟一個認(rèn)證Session。
參考上面的分析，我們就需要對EloquentUserProvider中的validateCredentials方法進(jìn)行重寫,步驟如下
1. 修改 App\Models\User.php 添加如下代碼
public function getAuthPassword()
{
return ['password' => $this->attributes['password'], 'salt' => $this->attributes['salt']];
}
2. 建立一個自己的UserProvider.php 的實現(xiàn)
<?php
namespace App\Foundation\Auth;
use Illuminate\Auth\EloquentUserProvider;
use Illuminate\Contracts\Auth\Authenticatable;
use Illuminate\Support\Str;
/**
* 重寫用戶密碼校驗邏輯
* Class GfzxEloquentUserProvider
* @package App\Foundation\Auth
*/
class GfzxEloquentUserProvider extends EloquentUserProvider
{
/**
* Validate a user against the given credentials.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param array $credentials
* @return bool
*/
public function validateCredentials(Authenticatable $user, array $credentials)
{
$plain = $credentials['password'];
$authPassword = $user->getAuthPassword();
return md5($plain . $authPassword['salt']) == $authPassword['password'];
}
}
3. 將User Providers換成我們自己的GfzxEloquentUserProvider
修改 app/Providers/AuthServiceProvider.php
<?php
namespace App\Providers;
use App\Foundation\Auth\GfzxEloquentUserProvider;
use Auth;
use Illuminate\Support\Facades\Gate;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
class AuthServiceProvider extends ServiceProvider
{
.
.
.
/**
* Register any authentication / authorization services.
*
* @return void
*/
public function boot()
{
$this->registerPolicies();
Auth::provider('gfzx-eloquent', function ($app, $config) {
return new GfzxEloquentUserProvider($this->app['hash'], $config['model']);
});
}
}
4. 修改 config/auth.php
'providers' => [
'users' => [
'driver' => 'gfzx-eloquent',
'model' => App\Models\User::class,
],
],
這是就可以用過salt+passwrod的方式密碼認(rèn)證了
文章參考
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