PhabricatorKeyring.php
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	<?php

	final class PhabricatorKeyring extends Phobject {

	private static $hasReadConfiguration;
	private static $keyRing = array();

	public static function addKey($spec) {
	self::$keyRing[$spec['name']] = $spec;
	}

	public static function getKey($name, $type) {
	self::readConfiguration();

	if (empty(self::$keyRing[$name])) {
	throw new Exception(
	pht(
	'No key "%s" exists in keyring.',
	$name));
	}

	$spec = self::$keyRing[$name];

	$material = base64_decode($spec['material.base64'], true);
	return new PhutilOpaqueEnvelope($material);
	}

	public static function getDefaultKeyName($type) {
	self::readConfiguration();

	foreach (self::$keyRing as $name => $key) {
	if (!empty($key['default'])) {
	return $name;
	}
	}

	return null;
	}

	private static function readConfiguration() {
	if (self::$hasReadConfiguration) {
	return true;
	}

	self::$hasReadConfiguration = true;

	foreach (PhabricatorEnv::getEnvConfig('keyring') as $spec) {
	self::addKey($spec);
	}
	}

	}