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152 lines
4.3 KiB
PHP
152 lines
4.3 KiB
PHP
<?php
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/**
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* PKCS#1 Formatted RSA Key Handler
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*
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* PHP version 5
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*
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* Used by File/X509.php
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*
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* Processes keys with the following headers:
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*
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* -----BEGIN RSA PRIVATE KEY-----
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* -----BEGIN RSA PUBLIC KEY-----
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*
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* Analogous to ssh-keygen's pem format (as specified by -m)
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*
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* @category Crypt
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* @package RSA
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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 phpseclib\Crypt\RSA;
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use phpseclib\Math\BigInteger;
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use phpseclib\Crypt\Common\PKCS1 as Progenitor;
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use phpseclib\File\ASN1;
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use phpseclib\File\ASN1\Maps;
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/**
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* PKCS#1 Formatted RSA Key Handler
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*
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* @package RSA
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* @author Jim Wigginton <terrafrost@php.net>
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* @access public
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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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* @access public
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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, $password = '')
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{
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if (!is_string($key)) {
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return false;
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}
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$components = ['isPublicKey' => strpos($key, 'PUBLIC') !== false];
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$key = parent::load($key, $password);
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if ($key === false) {
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return false;
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}
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$decoded = ASN1::decodeBER($key);
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if (empty($decoded)) {
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return false;
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}
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$key = ASN1::asn1map($decoded[0], Maps\RSAPrivateKey::MAP);
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if (is_array($key)) {
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$components+= [
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'modulus' => $key['modulus'],
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'publicExponent' => $key['publicExponent'],
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'privateExponent' => $key['privateExponent'],
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'primes' => [1 => $key['prime1'], $key['prime2']],
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'exponents' => [1 => $key['exponent1'], $key['exponent2']],
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'coefficients' => [2 => $key['coefficient']]
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];
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if ($key['version'] == 'multi') {
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foreach ($key['otherPrimeInfos'] as $primeInfo) {
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$components['primes'][] = $primeInfo['prime'];
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$components['exponents'][] = $primeInfo['exponent'];
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$components['coefficients'][] = $primeInfo['coefficient'];
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}
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}
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return $components;
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}
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$key = ASN1::asn1map($decoded[0], Maps\RSAPublicKey::MAP);
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return is_array($key) ? $components + $key : false;
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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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* @access public
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* @param \phpseclib\Math\BigInteger $n
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* @param \phpseclib\Math\BigInteger $e
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* @param \phpseclib\Math\BigInteger $d
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* @param array $primes
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* @param array $exponents
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* @param array $coefficients
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* @param string $password optional
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* @return string
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*/
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public static function savePrivateKey(BigInteger $n, BigInteger $e, BigInteger $d, $primes, $exponents, $coefficients, $password = '')
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{
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$num_primes = count($primes);
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$key = [
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'version' => $num_primes == 2 ? 'two-prime' : 'multi',
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'modulus' => $n,
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'publicExponent' => $e,
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'privateExponent' => $d,
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'prime1' => $primes[1],
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'prime2' => $primes[2],
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'exponent1' => $exponents[1],
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'exponent2' => $exponents[2],
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'coefficient' => $coefficients[2]
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];
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for ($i = 3; $i <= $num_primes; $i++) {
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$key['otherPrimeInfos'][] = [
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'prime' => $primes[$i],
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'exponent' => $exponents[$i],
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'coefficient' => $coefficients[$i]
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];
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}
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$key = ASN1::encodeDER($key, Maps\RSAPrivateKey::MAP);
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return self::wrapPrivateKey($key, 'RSA', $password);
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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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* @access public
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* @param \phpseclib\Math\BigInteger $n
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* @param \phpseclib\Math\BigInteger $e
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* @return string
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*/
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public static function savePublicKey(BigInteger $n, BigInteger $e)
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{
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$key = [
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'modulus' => $n,
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'publicExponent' => $e
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];
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$key = ASN1::encodeDER($key, Maps\RSAPublicKey::MAP);
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return self::wrapPublicKey($key, 'RSA');
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}
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}
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