added key generation task.

laravel/cli/tasks/key.php

@@ -0,0 +1,53 @@
+<?php namespace Laravel\CLI\Tasks;
+
+use Laravel\Str;
+use Laravel\File;
+
+class Key extends Task {
+
+	/**
+	 * The path to the application config.
+	 *
+	 * @var string
+	 */
+	protected $path;
+
+	/**
+	 * Create a new instance of the Key task.
+	 *
+	 * @return void
+	 */
+	public function __construct()
+	{
+		$this->path = APP_PATH.'config/application'.EXT;
+	}
+
+	/**
+	 * Generate a random key for the application.
+	 *
+	 * @param  array  $arguments
+	 * @return void
+	 */
+	public function generate($arguments = array())
+	{
+		// By default the Crypter class uses AES-256 encryption which uses
+		// a 32 byte input vector, so that is the length of string we will
+		// generate for the application token unless another length is
+		// specified through the CLI.
+		$key = Str::random(array_get($arguments, 0, 32));
+
+		$config = str_replace("'key' => '',", "'key' => '{$key}',", File::get($this->path), $count);
+
+		File::put($this->path, $config);
+
+		if ($count > 0)
+		{
+			echo "Configuration updated with secure key!";
+		}
+		else
+		{
+			echo "An application key already exists!";
+		}
+	}
+
+}