77 lines
2.1 KiB
PHP
77 lines
2.1 KiB
PHP
<?php
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/**
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* "PKCS1" Formatted EC 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 DH PARAMETERS-----
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*
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* Technically, PKCS1 is for RSA keys, only, but we're using PKCS1 to describe
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* DSA, whose format isn't really formally described anywhere, so might as well
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* use it to describe this, too.
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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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declare(strict_types=1);
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namespace phpseclib3\Crypt\DH\Formats\Keys;
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use phpseclib3\Crypt\Common\Formats\Keys\PKCS1 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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* "PKCS1" 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 PKCS1 extends Progenitor
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{
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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|array $key
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* @param string|false $password
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*/
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public static function load($key, $password = ''): array
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{
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$key = parent::load($key, $password);
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$decoded = ASN1::decodeBER($key);
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if (empty($decoded)) {
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throw new \RuntimeException('Unable to decode BER');
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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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return $components;
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}
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/**
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* Convert EC parameters to the appropriate format
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*/
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public static function saveParameters(BigInteger $prime, BigInteger $base, array $options = []): string
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{
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$params = [
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'prime' => $prime,
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'base' => $base
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];
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$params = ASN1::encodeDER($params, Maps\DHParameter::MAP);
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return "-----BEGIN DH PARAMETERS-----\r\n" .
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chunk_split(base64_encode($params), 64) .
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"-----END DH PARAMETERS-----\r\n";
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}
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}
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