126 lines
3.9 KiB
PHP
126 lines
3.9 KiB
PHP
<?php
|
|
/*
|
|
* Copyright 2010-2012 Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
* A copy of the License is located at
|
|
*
|
|
* http://aws.amazon.com/apache2.0
|
|
*
|
|
* or in the "license" file accompanying this file. This file is distributed
|
|
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
|
|
* express or implied. See the License for the specific language governing
|
|
* permissions and limitations under the License.
|
|
*/
|
|
|
|
|
|
/*%******************************************************************************************%*/
|
|
// CLASS
|
|
|
|
/**
|
|
* The <CFCredentials> class enables developers to easily switch between multiple sets of credentials.
|
|
*
|
|
* @version 2011.11.15
|
|
* @license See the included NOTICE.md file for more information.
|
|
* @copyright See the included NOTICE.md file for more information.
|
|
* @link http://aws.amazon.com/php/ PHP Developer Center
|
|
*/
|
|
class CFCredentials
|
|
{
|
|
/**
|
|
* The key used to specify the default credential set
|
|
*/
|
|
const DEFAULT_KEY = '@default';
|
|
|
|
/**
|
|
* The key used to identify inherited credentials
|
|
*/
|
|
const INHERIT_KEY = '@inherit';
|
|
|
|
/**
|
|
* Stores the credentials
|
|
*/
|
|
protected static $credentials = array();
|
|
|
|
/**
|
|
* Prevents this class from being constructed
|
|
*/
|
|
final private function __construct() {}
|
|
|
|
/**
|
|
* Stores the credentials for re-use.
|
|
*
|
|
* @param array $credential_sets (Required) The named credential sets that should be made available to the application.
|
|
* @return void
|
|
*/
|
|
public static function set(array $credential_sets)
|
|
{
|
|
// Make sure a default credential set is specified or can be inferred
|
|
if (count($credential_sets) === 1)
|
|
{
|
|
$credential_sets[self::DEFAULT_KEY] = reset($credential_sets);
|
|
}
|
|
elseif (!isset($credential_sets[self::DEFAULT_KEY]))
|
|
{
|
|
throw new CFCredentials_Exception('If more than one credential set is provided, a default credential set (identified by the key "' . self::DEFAULT_KEY . '") must be specified.');
|
|
}
|
|
|
|
// Resolve any @inherit tags
|
|
foreach ($credential_sets as $credential_name => &$credential_set)
|
|
{
|
|
if (is_array($credential_set))
|
|
{
|
|
foreach ($credential_set as $credential_key => &$credential_value)
|
|
{
|
|
if ($credential_key === self::INHERIT_KEY)
|
|
{
|
|
if (!isset($credential_sets[$credential_value]))
|
|
{
|
|
throw new CFCredentials_Exception('The credential set, "' . $credential_value . '", does not exist and cannot be inherited.');
|
|
}
|
|
|
|
$credential_set = array_merge($credential_sets[$credential_value], $credential_set);
|
|
unset($credential_set[self::INHERIT_KEY]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Normalize the value of the @default credential set
|
|
$default = $credential_sets[self::DEFAULT_KEY];
|
|
if (is_string($default))
|
|
{
|
|
if (!isset($credential_sets[$default]))
|
|
{
|
|
throw new CFCredentials_Exception('The credential set, "' . $default . '", does not exist and cannot be used as the default credential set.');
|
|
}
|
|
|
|
$credential_sets[self::DEFAULT_KEY] = $credential_sets[$default];
|
|
}
|
|
|
|
// Store the credentials
|
|
self::$credentials = $credential_sets;
|
|
}
|
|
|
|
/**
|
|
* Retrieves the requested credentials from the internal credential store.
|
|
*
|
|
* @param string $credential_set (Optional) The name of the credential set to retrieve. The default value is set in DEFAULT_KEY.
|
|
* @return stdClass A stdClass object where the properties represent the keys that were provided.
|
|
*/
|
|
public static function get($credential_name = self::DEFAULT_KEY)
|
|
{
|
|
// Make sure the credential set exists
|
|
if (!isset(self::$credentials[$credential_name]))
|
|
{
|
|
throw new CFCredentials_Exception('The credential set, "' . $credential_name . '", does not exist and cannot be retrieved.');
|
|
}
|
|
|
|
// Return the credential set as an object
|
|
return new CFCredential(self::$credentials[$credential_name]);
|
|
}
|
|
}
|
|
|
|
class CFCredentials_Exception extends Exception {}
|