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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Crypt
* @subpackage Rsa
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/
/**
* @see Zend_Crypt_Rsa_Key_Private
*/
/**
* @see Zend_Crypt_Rsa_Key_Public
*/
/**
* @category Zend
* @package Zend_Crypt
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Crypt_Rsa
{
const BINARY = 'binary';
const BASE64 = 'base64';
protected $_privateKey;
protected $_publicKey;
/**
* @var string
*/
protected $_pemString;
protected $_pemPath;
protected $_certificateString;
protected $_certificatePath;
protected $_hashAlgorithm;
protected $_passPhrase;
/**
* Class constructor
*
* @param array $options
* @throws Zend_Crypt_Rsa_Exception
*/
public function __construct(array $options = null)
{
if (!extension_loaded('openssl')) {
throw new Zend_Crypt_Rsa_Exception('Zend_Crypt_Rsa requires openssl extension to be loaded.');
}
// Set _hashAlgorithm property when we are sure, that openssl extension is loaded
// and OPENSSL_ALGO_SHA1 constant is available
$this->_hashAlgorithm = OPENSSL_ALGO_SHA1;
if (isset($options)) {
$this->setOptions($options);
}
}
public function setOptions(array $options)
{
if (isset($options['passPhrase'])) {
$this->_passPhrase = $options['passPhrase'];
}
foreach ($options as $option=>$value) {
switch ($option) {
case 'pemString':
$this->setPemString($value);
break;
case 'pemPath':
$this->setPemPath($value);
break;
case 'certificateString':
$this->setCertificateString($value);
break;
case 'certificatePath':
$this->setCertificatePath($value);
break;
case 'hashAlgorithm':
$this->setHashAlgorithm($value);
break;
}
}
}
public function getPrivateKey()
{
return $this->_privateKey;
}
public function getPublicKey()
{
return $this->_publicKey;
}
/**
* @param string $data
* @param Zend_Crypt_Rsa_Key_Private $privateKey
* @param string $format
* @return string
*/
public function sign($data, Zend_Crypt_Rsa_Key_Private $privateKey = null, $format = null)
{
$signature = '';
if (isset($privateKey)) {
$opensslKeyResource = $privateKey->getOpensslKeyResource();
} else {
$opensslKeyResource = $this->_privateKey->getOpensslKeyResource();
}
$result = openssl_sign(
$data, $signature,
$opensslKeyResource,
$this->getHashAlgorithm()
);
if ($format == self::BASE64) {
return base64_encode($signature);
}
return $signature;
}
/**
* @param string $data
* @param string $signature
* @param string $format
* @return string
*/
public function verifySignature($data, $signature, $format = null)
{
if ($format == self::BASE64) {
$signature = base64_decode($signature);
}
$result = openssl_verify($data, $signature,
$this->getPublicKey()->getOpensslKeyResource(),
$this->getHashAlgorithm());
return $result;
}
/**
* @param string $data
* @param Zend_Crypt_Rsa_Key $key
* @param string $format
* @return string
*/
public function encrypt($data, Zend_Crypt_Rsa_Key $key, $format = null)
{
$encrypted = '';
$function = 'openssl_public_encrypt';
if ($key instanceof Zend_Crypt_Rsa_Key_Private) {
$function = 'openssl_private_encrypt';
}
$function($data, $encrypted, $key->getOpensslKeyResource());
if ($format == self::BASE64) {
return base64_encode($encrypted);
}
return $encrypted;
}
/**
* @param string $data
* @param Zend_Crypt_Rsa_Key $key
* @param string $format
* @return string
*/
public function decrypt($data, Zend_Crypt_Rsa_Key $key, $format = null)
{
$decrypted = '';
if ($format == self::BASE64) {
$data = base64_decode($data);
}
$function = 'openssl_private_decrypt';
if ($key instanceof Zend_Crypt_Rsa_Key_Public) {
$function = 'openssl_public_decrypt';
}
$function($data, $decrypted, $key->getOpensslKeyResource());
return $decrypted;
}
/**
* @param array $configargs
*
* @throws Zend_Crypt_Rsa_Exception
*
* @return ArrayObject
*/
public function generateKeys(array $configargs = null)
{
$config = null;
$passPhrase = null;
if ($configargs !== null) {
if (isset($configargs['passPhrase'])) {
$passPhrase = $configargs['passPhrase'];
unset($configargs['passPhrase']);
}
$config = $this->_parseConfigArgs($configargs);
}
$privateKey = null;
$publicKey = null;
$resource = openssl_pkey_new($config);
if (!$resource) {
throw new Zend_Crypt_Rsa_Exception('Failed to generate a new private key');
}
// above fails on PHP 5.3
openssl_pkey_export($resource, $private, $passPhrase);
$privateKey = new Zend_Crypt_Rsa_Key_Private($private, $passPhrase);
$details = openssl_pkey_get_details($resource);
$publicKey = new Zend_Crypt_Rsa_Key_Public($details['key']);
$return = new ArrayObject(array(
'privateKey'=>$privateKey,
'publicKey'=>$publicKey
), ArrayObject::ARRAY_AS_PROPS);
return $return;
}
/**
* @param string $value
*/
public function setPemString($value)
{
$this->_pemString = $value;
try {
$this->_privateKey = new Zend_Crypt_Rsa_Key_Private($this->_pemString, $this->_passPhrase);
$this->_publicKey = $this->_privateKey->getPublicKey();
} catch (Zend_Crypt_Exception $e) {
$this->_privateKey = null;
$this->_publicKey = new Zend_Crypt_Rsa_Key_Public($this->_pemString);
}
}
public function setPemPath($value)
{
$this->_pemPath = $value;
$this->setPemString(file_get_contents($this->_pemPath));
}
public function setCertificateString($value)
{
$this->_certificateString = $value;
$this->_publicKey = new Zend_Crypt_Rsa_Key_Public($this->_certificateString, $this->_passPhrase);
}
public function setCertificatePath($value)
{
$this->_certificatePath = $value;
$this->setCertificateString(file_get_contents($this->_certificatePath));
}
public function setHashAlgorithm($name)
{
switch (strtolower($name)) {
case 'md2':
$this->_hashAlgorithm = OPENSSL_ALGO_MD2;
break;
case 'md4':
$this->_hashAlgorithm = OPENSSL_ALGO_MD4;
break;
case 'md5':
$this->_hashAlgorithm = OPENSSL_ALGO_MD5;
break;
case 'sha1':
$this->_hashAlgorithm = OPENSSL_ALGO_SHA1;
break;
case 'dss1':
$this->_hashAlgorithm = OPENSSL_ALGO_DSS1;
break;
}
}
/**
* @return string
*/
public function getPemString()
{
return $this->_pemString;
}
public function getPemPath()
{
return $this->_pemPath;
}
public function getCertificateString()
{
return $this->_certificateString;
}
public function getCertificatePath()
{
return $this->_certificatePath;
}
public function getHashAlgorithm()
{
return $this->_hashAlgorithm;
}
protected function _parseConfigArgs(array $config = null)
{
$configs = array();
if (isset($config['private_key_bits'])) {
$configs['private_key_bits'] = $config['private_key_bits'];
}
if (isset($config['privateKeyBits'])) {
$configs['private_key_bits'] = $config['privateKeyBits'];
}
if (!empty($configs)) {
return $configs;
}
return null;
}
}
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