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<?php
/**
* PKCS#8 Formatted RSA Key Handler
*
* PHP version 5
*
* Used by PHP's openssl_public_encrypt() and openssl's rsautl (when -pubin is set)
*
* Processes keys with the following headers:
*
* -----BEGIN ENCRYPTED PRIVATE KEY-----
* -----BEGIN PRIVATE KEY-----
* -----BEGIN PUBLIC KEY-----
*
* Analogous to ssh-keygen's pkcs8 format (as specified by -m). Although PKCS8
* is specific to private keys it's basically creating a DER-encoded wrapper
* for keys. This just extends that same concept to public keys (much like ssh-keygen)
*
* @category Crypt
* @package RSA
* @author Jim Wigginton <terrafrost@php.net>
* @copyright 2015 Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
*/
namespace phpseclib3\Crypt\RSA\Formats\Keys;
use phpseclib3\Math\BigInteger;
use phpseclib3\Crypt\Common\Formats\Keys\PKCS8 as Progenitor;
use phpseclib3\File\ASN1;
use phpseclib3\Common\Functions\Strings;
/**
* PKCS#8 Formatted RSA Key Handler
*
* @package RSA
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
abstract class PKCS8 extends Progenitor
{
/**
* OID Name
*
* @var string
* @access private
*/
const OID_NAME = 'rsaEncryption';
/**
* OID Value
*
* @var string
* @access private
*/
const OID_VALUE = '1.2.840.113549.1.1.1';
/**
* Child OIDs loaded
*
* @var bool
* @access private
*/
protected static $childOIDsLoaded = false;
/**
* Break a public or private key down into its constituent components
*
* @access public
* @param string $key
* @param string $password optional
* @return array
*/
public static function load($key, $password = '')
{
if (!Strings::is_stringable($key)) {
throw new \UnexpectedValueException('Key should be a string - not a ' . gettype($key));
}
if (strpos($key, 'PUBLIC') !== false) {
$components = ['isPublicKey' => true];
} elseif (strpos($key, 'PRIVATE') !== false) {
$components = ['isPublicKey' => false];
} else {
$components = [];
}
$key = parent::load($key, $password);
if (isset($key['privateKey'])) {
if (!isset($components['isPublicKey'])) {
$components['isPublicKey'] = false;
}
$type = 'private';
} else {
if (!isset($components['isPublicKey'])) {
$components['isPublicKey'] = true;
}
$type = 'public';
}
$result = $components + PKCS1::load($key[$type . 'Key']);
if (isset($key['meta'])) {
$result['meta'] = $key['meta'];
}
return $result;
}
/**
* Convert a private key to the appropriate format.
*
* @access public
* @param \phpseclib3\Math\BigInteger $n
* @param \phpseclib3\Math\BigInteger $e
* @param \phpseclib3\Math\BigInteger $d
* @param array $primes
* @param array $exponents
* @param array $coefficients
* @param string $password optional
* @param array $options optional
* @return string
*/
public static function savePrivateKey(BigInteger $n, BigInteger $e, BigInteger $d, array $primes, array $exponents, array $coefficients, $password = '', array $options = [])
{
$key = PKCS1::savePrivateKey($n, $e, $d, $primes, $exponents, $coefficients);
$key = ASN1::extractBER($key);
return self::wrapPrivateKey($key, [], null, $password, $options);
}
/**
* Convert a public key to the appropriate format
*
* @access public
* @param \phpseclib3\Math\BigInteger $n
* @param \phpseclib3\Math\BigInteger $e
* @param array $options optional
* @return string
*/
public static function savePublicKey(BigInteger $n, BigInteger $e, array $options = [])
{
$key = PKCS1::savePublicKey($n, $e);
$key = ASN1::extractBER($key);
return self::wrapPublicKey($key, null);
}
}
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