该方法中调用 UserProvider 接口的retrieveByCredentials方法检索用户，根据我们的配置，UserProvider接口的具体实现应该是EloquentUserProvider，因此，我们定位到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(); }
该方法会使用传入的参数（不包含password）到我们配置的数据表中搜索数据，查询到符合条件的数据之后返回对应的用户信息，然后attempt方法会进行密码校验，校验密码的方法为：
//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); }
进一步查看EloquentUserProvider中的validateCredentials方法
//Illuminate\Auth\EloquentUserProvider public function validateCredentials(UserContract $user, array $credentials) { $plain = $credentials['password']; return $this->hasher->check($plain, $user->getAuthPassword()); }
通过validateCredentials可以看出，提交的认证数据中密码字段名必须是password，这个无法自定义。同时可以看到，入参$user必须实现Illuminate\Contracts\Auth\Authenticatable接口（UserContract是别名）。
修改 Admin 模型Admin模型必须实现Illuminate\Contracts\Auth\Authenticatable接口，可以借鉴一下User模型，让Admin直接继承Illuminate\Foundation\Auth\User 就可以，然后重写getAuthPassword方法，正确获取密码字段：
// App\Admin public function getAuthPassword() { return $this->login_pass; }
不出意外的话，这个时候就能使用admins表进行登录了。
Larval 5.4的默认Auth登陆传入邮件和用户密码到attempt 方法来认证，通过email 的值获取，如果用户被找到，经哈希运算后存储在数据中的password将会和传递过来的经哈希运算处理的passwrod值进行比较。如果两个经哈希运算的密码相匹配那么将会为这个用户开启一个认证Session。
参考上面的分析，我们就需要对EloquentUserProvider中的validateCredentials方法进行重写,步骤如下
1. 修改 App\Models\User.php 添加如下代码
public function getAuthPassword() { return ['password' => $this->attributes['password'], 'salt' => $this->attributes['salt']]; }
2. 建立一个自己的UserProvider.php 的实现
<?php namespace App\Foundation\Auth; use Illuminate\Auth\EloquentUserProvider; use Illuminate\Contracts\Auth\Authenticatable; use Illuminate\Support\Str; /** * 重写用户密码校验逻辑 * 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. 将User Providers换成我们自己的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, ], ],
这是就可以用过salt+passwrod的方式密码认证了
文章参考