snipe-it/app/Http/Controllers/ChangePasswordController.php

<?php
namespace App\Http\Controllers;

use Input;
use Redirect;
use Validator;
use View;
use Config;
use Lang;

class ChangePasswordController extends Controller
{
    /**
     * User change password page.
     *
     * @return View
     */
    public function getIndex()
    {
        // Get the user information
        $user = Auth::user();

        // Show the page
        return View::make('account/change-password', compact('user'));
    }

    /**
     * User change password form processing page.
     *
     * @return Redirect
     */
    protected function postIndex()
    {


        if (config('app.lock_passwords')) {
            return Redirect::route('change-password')->with('error', Lang::get('admin/users/table.lock_passwords'));
        } else {

        // Declare the rules for the form validation
            $rules = array(
            'old_password'     => 'required|min:6',
            'password'         => 'required|min:6',
            'password_confirm' => 'required|same:password',
            );

        // Create a new validator instance from our validation rules
            $validator = Validator::make(Input::all(), $rules);

        // If validation fails, we'll exit the operation now.
            if ($validator->fails()) {
                // Ooops.. something went wrong
                return Redirect::back()->withInput()->withErrors($validator);
            }

        // Grab the user
            $user = Auth::user();

        // Check the user current password
            if (! $user->checkPassword(Input::get('old_password'))) {
                // Set the error message
                $this->messageBag->add('old_password', 'Your current password is incorrect.');

                // Redirect to the change password page
                return Redirect::route('change-password')->withErrors($this->messageBag);
            }

        // Update the user password
            $user->password = Input::get('password');
            $user->save();
        }

        // Redirect to the change-password page
        return Redirect::route('change-password')->with('success', 'Password successfully updated');
    }
}