147 lines
4.5 KiB
PHP
147 lines
4.5 KiB
PHP
<?php
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/**
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* PKCS#8 Formatted DH Key Handler
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*
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* PHP version 5
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*
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* Processes keys with the following headers:
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*
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* -----BEGIN ENCRYPTED PRIVATE KEY-----
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* -----BEGIN PRIVATE KEY-----
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* -----BEGIN PUBLIC KEY-----
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*
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright 2015 Jim Wigginton
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link http://phpseclib.sourceforge.net
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*/
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namespace phpseclib3\Crypt\DH\Formats\Keys;
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use phpseclib3\Common\Functions\Strings;
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use phpseclib3\Crypt\Common\Formats\Keys\PKCS8 as Progenitor;
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use phpseclib3\File\ASN1;
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use phpseclib3\File\ASN1\Maps;
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use phpseclib3\Math\BigInteger;
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/**
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* PKCS#8 Formatted DH Key Handler
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*
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* @author Jim Wigginton <terrafrost@php.net>
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*/
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abstract class PKCS8 extends Progenitor
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{
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/**
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* OID Name
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*
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* @var string
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*/
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const OID_NAME = 'dhKeyAgreement';
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/**
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* OID Value
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*
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* @var string
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*/
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const OID_VALUE = '1.2.840.113549.1.3.1';
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/**
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* Child OIDs loaded
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*
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* @var bool
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*/
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protected static $childOIDsLoaded = false;
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/**
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* Break a public or private key down into its constituent components
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*
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* @param string $key
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* @param string $password optional
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* @return array
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*/
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public static function load($key, $password = '')
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{
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if (!Strings::is_stringable($key)) {
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throw new \UnexpectedValueException('Key should be a string - not a ' . gettype($key));
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}
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$isPublic = strpos($key, 'PUBLIC') !== false;
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$key = parent::load($key, $password);
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$type = isset($key['privateKey']) ? 'privateKey' : 'publicKey';
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switch (true) {
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case !$isPublic && $type == 'publicKey':
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throw new \UnexpectedValueException('Human readable string claims non-public key but DER encoded string claims public key');
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case $isPublic && $type == 'privateKey':
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throw new \UnexpectedValueException('Human readable string claims public key but DER encoded string claims private key');
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}
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$decoded = ASN1::decodeBER($key[$type . 'Algorithm']['parameters']->element);
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if (empty($decoded)) {
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throw new \RuntimeException('Unable to decode BER of parameters');
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}
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$components = ASN1::asn1map($decoded[0], Maps\DHParameter::MAP);
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if (!is_array($components)) {
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throw new \RuntimeException('Unable to perform ASN1 mapping on parameters');
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}
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$decoded = ASN1::decodeBER($key[$type]);
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switch (true) {
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case !isset($decoded):
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case !isset($decoded[0]['content']):
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case !$decoded[0]['content'] instanceof BigInteger:
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throw new \RuntimeException('Unable to decode BER of parameters');
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}
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$components[$type] = $decoded[0]['content'];
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return $components;
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}
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/**
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* Convert a private key to the appropriate format.
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*
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* @param \phpseclib3\Math\BigInteger $prime
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* @param \phpseclib3\Math\BigInteger $base
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* @param \phpseclib3\Math\BigInteger $privateKey
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* @param \phpseclib3\Math\BigInteger $publicKey
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* @param string $password optional
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* @param array $options optional
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* @return string
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*/
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public static function savePrivateKey(BigInteger $prime, BigInteger $base, BigInteger $privateKey, BigInteger $publicKey, $password = '', array $options = [])
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{
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$params = [
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'prime' => $prime,
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'base' => $base
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];
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$params = ASN1::encodeDER($params, Maps\DHParameter::MAP);
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$params = new ASN1\Element($params);
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$key = ASN1::encodeDER($privateKey, ['type' => ASN1::TYPE_INTEGER]);
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return self::wrapPrivateKey($key, [], $params, $password, null, '', $options);
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}
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/**
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* Convert a public key to the appropriate format
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*
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* @param \phpseclib3\Math\BigInteger $prime
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* @param \phpseclib3\Math\BigInteger $base
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* @param \phpseclib3\Math\BigInteger $publicKey
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* @param array $options optional
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* @return string
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*/
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public static function savePublicKey(BigInteger $prime, BigInteger $base, BigInteger $publicKey, array $options = [])
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{
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$params = [
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'prime' => $prime,
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'base' => $base
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];
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$params = ASN1::encodeDER($params, Maps\DHParameter::MAP);
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$params = new ASN1\Element($params);
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$key = ASN1::encodeDER($publicKey, ['type' => ASN1::TYPE_INTEGER]);
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return self::wrapPublicKey($key, $params);
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}
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}
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