* @copyright 2015 Jim Wigginton * @license http://www.opensource.org/licenses/mit-license.html MIT License * @link http://phpseclib.sourceforge.net */ namespace phpseclib\Crypt\RSA; use phpseclib\Math\BigInteger; use phpseclib\Crypt\Common\PKCS1 as Progenitor; use phpseclib\File\ASN1; use phpseclib\File\ASN1\Maps; /** * PKCS#1 Formatted RSA Key Handler * * @package RSA * @author Jim Wigginton * @access public */ abstract class PKCS1 extends Progenitor { /** * 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, $password = '') { if (!is_string($key)) { return false; } $components = ['isPublicKey' => strpos($key, 'PUBLIC') !== false]; $key = parent::load($key, $password); if ($key === false) { return false; } $decoded = ASN1::decodeBER($key); if (empty($decoded)) { return false; } $key = ASN1::asn1map($decoded[0], Maps\RSAPrivateKey::MAP); if (is_array($key)) { $components+= [ 'modulus' => $key['modulus'], 'publicExponent' => $key['publicExponent'], 'privateExponent' => $key['privateExponent'], 'primes' => [1 => $key['prime1'], $key['prime2']], 'exponents' => [1 => $key['exponent1'], $key['exponent2']], 'coefficients' => [2 => $key['coefficient']] ]; if ($key['version'] == 'multi') { foreach ($key['otherPrimeInfos'] as $primeInfo) { $components['primes'][] = $primeInfo['prime']; $components['exponents'][] = $primeInfo['exponent']; $components['coefficients'][] = $primeInfo['coefficient']; } } return $components; } $key = ASN1::asn1map($decoded[0], Maps\RSAPublicKey::MAP); return is_array($key) ? $components + $key : false; } /** * Convert a private key to the appropriate format. * * @access public * @param \phpseclib\Math\BigInteger $n * @param \phpseclib\Math\BigInteger $e * @param \phpseclib\Math\BigInteger $d * @param array $primes * @param array $exponents * @param array $coefficients * @param string $password optional * @return string */ public static function savePrivateKey(BigInteger $n, BigInteger $e, BigInteger $d, $primes, $exponents, $coefficients, $password = '') { $num_primes = count($primes); $key = [ 'version' => $num_primes == 2 ? 'two-prime' : 'multi', 'modulus' => $n, 'publicExponent' => $e, 'privateExponent' => $d, 'prime1' => $primes[1], 'prime2' => $primes[2], 'exponent1' => $exponents[1], 'exponent2' => $exponents[2], 'coefficient' => $coefficients[2] ]; for ($i = 3; $i <= $num_primes; $i++) { $key['otherPrimeInfos'][] = [ 'prime' => $primes[$i], 'exponent' => $exponents[$i], 'coefficient' => $coefficients[$i] ]; } $key = ASN1::encodeDER($key, Maps\RSAPrivateKey::MAP); return self::wrapPrivateKey($key, 'RSA', $password); } /** * Convert a public key to the appropriate format * * @access public * @param \phpseclib\Math\BigInteger $n * @param \phpseclib\Math\BigInteger $e * @return string */ public static function savePublicKey(BigInteger $n, BigInteger $e) { $key = [ 'modulus' => $n, 'publicExponent' => $e ]; $key = ASN1::encodeDER($key, Maps\RSAPublicKey::MAP); return self::wrapPublicKey($key, 'RSA'); } }