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terrafrost 2017-04-15 19:35:07 -05:00
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80
phpseclib/Crypt/Common/PKCS.php
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<?php
/**
* PKCS Formatted Key Handler
*
* PHP version 5
*
* @category Crypt
* @package Common
* @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 phpseclib\Crypt\Common;
/**
* PKCS1 Formatted Key Handler
*
* @package RSA
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
abstract class PKCS
{
/**
* Auto-detect the format
*/
const MODE_ANY = 0;
/**
* Require base64-encoded PEM's be supplied
*/
const MODE_PEM = 1;
/**
* Require raw DER's be supplied
*/
const MODE_DER = 2;
/**#@-*/
/**
* Is the key a base-64 encoded PEM, DER or should it be auto-detected?
*
* @access private
* @param int
*/
protected static $format = self::MODE_ANY;
/**
* Require base64-encoded PEM's be supplied
*
* @access public
*/
public static function requirePEM()
{
self::$format = self::MODE_PEM;
}
/**
* Require raw DER's be supplied
*
* @access public
*/
public static function requireDER()
{
self::$format = self::MODE_DER;
}
/**
* Accept any format and auto detect the format
*
* This is the default setting
*
* @access public
*/
public static function requireAny()
{
self::$format = self::MODE_ANY;
}
}

224
phpseclib/Crypt/Common/PKCS1.php
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<?php
/**
* PKCS1 Formatted Key Handler
*
* PHP version 5
*
* @category Crypt
* @package Common
* @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 phpseclib\Crypt\Common;
use ParagonIE\ConstantTime\Base64;
use ParagonIE\ConstantTime\Hex;
use phpseclib\Crypt\Common\BlockCipher;
use phpseclib\Crypt\Random;
use phpseclib\Crypt\AES;
use phpseclib\Crypt\Base;
use phpseclib\Crypt\DES;
use phpseclib\Crypt\TripleDES;
use phpseclib\File\ASN1;
/**
* PKCS1 Formatted Key Handler
*
* @package RSA
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
abstract class PKCS1 extends PKCS
{
/**
* Default encryption algorithm
*
* @var string
* @access private
*/
private static $defaultEncryptionAlgorithm = 'AES-128-CBC';
/**
* Sets the default encryption algorithm
*
* @access public
* @param string $algo
*/
public static function setEncryptionAlgorithm($algo)
{
self::$defaultEncryptionAlgorithm = $algo;
}
/**
* Returns the mode constant corresponding to the mode string
*
* @access public
* @param string $mode
* @return int
* @throws \UnexpectedValueException if the block cipher mode is unsupported
*/
private static function getEncryptionMode($mode)
{
switch ($mode) {
case 'CBC':
return BlockCipher::MODE_CBC;
case 'ECB':
return BlockCipher::MODE_ECB;
case 'CFB':
return BlockCipher::MODE_CFB;
case 'OFB':
return BlockCipher::MODE_OFB;
case 'CTR':
return BlockCipher::MODE_CTR;
}
throw new \UnexpectedValueException('Unsupported block cipher mode of operation');
}
/**
* Returns a cipher object corresponding to a string
*
* @access public
* @param string $algo
* @return string
* @throws \UnexpectedValueException if the encryption algorithm is unsupported
*/
private static function getEncryptionObject($algo)
{
$modes = '(CBC|ECB|CFB|OFB|CTR)';
switch (true) {
case preg_match("#^AES-(128|192|256)-$modes$#", $algo, $matches):
$cipher = new AES(self::getEncryptionMode($matches[2]));
$cipher->setKeyLength($matches[1]);
return $cipher;
case preg_match("#^DES-EDE3-$modes$#", $algo, $matches):
return new TripleDES(self::getEncryptionMode($matches[1]));
case preg_match("#^DES-$modes$#", $algo, $matches):
return new DES(self::getEncryptionMode($matches[1]));
default:
throw new \UnexpectedValueException('Unsupported encryption algorithmn');
}
}
/**
* Generate a symmetric key for PKCS#1 keys
*
* @access public
* @param string $password
* @param string $iv
* @param int $length
* @return string
*/
private static function generateSymmetricKey($password, $iv, $length)
{
$symkey = '';
$iv = substr($iv, 0, 8);
while (strlen($symkey) < $length) {
$symkey.= md5($symkey . $password . $iv, true);
}
return substr($symkey, 0, $length);
}
/**
* Break a public or private key down into its constituent components
*
* @access public
* @param string $key
* @param string $password optional
* @return array
*/
protected static function load($key, $password)
{
if (!is_string($key)) {
return false;
}
/* Although PKCS#1 proposes a format that public and private keys can use, encrypting them is
"outside the scope" of PKCS#1. PKCS#1 then refers you to PKCS#12 and PKCS#15 if you're wanting to
protect private keys, however, that's not what OpenSSL* does. OpenSSL protects private keys by adding
two new "fields" to the key - DEK-Info and Proc-Type. These fields are discussed here:
http://tools.ietf.org/html/rfc1421#section-4.6.1.1
http://tools.ietf.org/html/rfc1421#section-4.6.1.3
DES-EDE3-CBC as an algorithm, however, is not discussed anywhere, near as I can tell.
DES-CBC and DES-EDE are discussed in RFC1423, however, DES-EDE3-CBC isn't, nor is its key derivation
function. As is, the definitive authority on this encoding scheme isn't the IETF but rather OpenSSL's
own implementation. ie. the implementation *is* the standard and any bugs that may exist in that
implementation are part of the standard, as well.
* OpenSSL is the de facto standard. It's utilized by OpenSSH and other projects */
if (preg_match('#DEK-Info: (.+),(.+)#', $key, $matches)) {
$iv = Hex::decode(trim($matches[2]));
// remove the Proc-Type / DEK-Info sections as they're no longer needed
$key = preg_replace('#^(?:Proc-Type|DEK-Info): .*#m', '', $key);
$ciphertext = ASN1::extractBER($key);
if ($ciphertext === false) {
$ciphertext = $key;
}
$crypto = self::getEncryptionObject($matches[1]);
$crypto->setKey(self::generateSymmetricKey($password, $iv, $crypto->getKeyLength() >> 3));
$crypto->setIV($iv);
$key = $crypto->decrypt($ciphertext);
} else {
if (self::$format != self::MODE_DER) {
$decoded = ASN1::extractBER($key);
if ($decoded !== false) {
$key = $decoded;
} elseif (self::$format == self::MODE_PEM) {
return false;
}
}
}
return $key;
}
/**
* Wrap a private key appropriately
*
* @access public
* @param string $key
* @param string $type
* @param string $password
* @return string
*/
protected static function wrapPrivateKey($key, $type, $password)
{
if (empty($password) || !is_string($password)) {
return "-----BEGIN $type PRIVATE KEY-----\r\n" .
chunk_split(Base64::encode($key), 64) .
"-----END $type PRIVATE KEY-----";
}
$cipher = self::getEncryptionObject(self::$defaultEncryptionAlgorithm);
$iv = Random::string($cipher->getBlockLength() >> 3);
$cipher->setKey(self::generateSymmetricKey($password, $iv, $cipher->getKeyLength() >> 3));
$cipher->setIV($iv);
$iv = strtoupper(Hex::encode($iv));
return "-----BEGIN $type PRIVATE KEY-----\r\n" .
"Proc-Type: 4,ENCRYPTED\r\n" .
"DEK-Info: " . self::$defaultEncryptionAlgorithm . ",$iv\r\n" .
"\r\n" .
chunk_split(Base64::encode($cipher->encrypt($key)), 64) .
"-----END $type PRIVATE KEY-----";
}
/**
* Wrap a public key appropriately
*
* @access public
* @param string $key
* @param string $type
* @return string
*/
protected static function wrapPublicKey($key, $type)
{
return "-----BEGIN $type PUBLIC KEY-----\r\n" .
chunk_split(Base64::encode($key), 64) .
"-----END $type PUBLIC KEY-----";
}
}

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phpseclib/Crypt/Common/PKCS8.php
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<?php
/**
* PKCS#8 Formatted 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 Common
* @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 phpseclib\Crypt\Common;
use ParagonIE\ConstantTime\Base64;
use phpseclib\Crypt\DES;
use phpseclib\Crypt\RC2;
use phpseclib\Crypt\RC4;
use phpseclib\Crypt\AES;
use phpseclib\Crypt\TripleDES;
use phpseclib\Crypt\Common\BlockCipher;
use phpseclib\Crypt\Random;
use phpseclib\Math\BigInteger;
use phpseclib\File\ASN1;
use phpseclib\File\ASN1\Maps;
use phpseclib\Exception\UnsupportedAlgorithmException;
/**
* PKCS#8 Formatted Key Handler
*
* @package Common
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
abstract class PKCS8 extends PKCS
{
/**
* Default encryption algorithm
*
* @var string
* @access private
*/
private static $defaultEncryptionAlgorithm = 'id-PBES2';
/**
* Default encryption scheme
*
* Only used when defaultEncryptionAlgorithm is id-PBES2
*
* @var string
* @access private
*/
private static $defaultEncryptionScheme = 'aes128-CBC-PAD';
/**
* Default PRF
*
* Only used when defaultEncryptionAlgorithm is id-PBES2
*
* @var string
* @access private
*/
private static $defaultPRF = 'id-hmacWithSHA256';
/**
* Default Iteration Count
*
* @var int
* @access private
*/
private static $defaultIterationCount = 2048;
/**
* OIDs loaded
*
* @var bool
* @access private
*/
private static $oidsLoaded = false;
/**
* Sets the default encryption algorithm
*
* @access public
* @param string $algo
*/
public static function setEncryptionAlgorithm($algo)
{
self::$defaultEncryptionAlgorithm = $algo;
}
/**
* Sets the default encryption algorithm for PBES2
*
* @access public
* @param string $algo
*/
public static function setEncryptionScheme($algo)
{
self::$defaultEncryptionScheme = $algo;
}
/**
* Sets the iteration count
*
* @access public
* @param int $count
*/
public static function setIterationCount($count)
{
self::$defaultIterationCount = $count;
}
/**
* Sets the PRF for PBES2
*
* @access public
* @param string $algo
*/
public static function setPRF($algo)
{
self::$defaultPRF = $algo;
}
/**
* Returns a SymmetricKey object based on a PBES1 $algo
*
* @access public
* @param string $algo
*/
private static function getPBES1EncryptionObject($algo)
{
$algo = preg_match('#^pbeWith(?:MD2|MD5|SHA1|SHA)And(.*?)-CBC$#', $algo, $matches) ?
$matches[1] :
substr($algo, 13); // strlen('pbeWithSHAAnd') == 13
switch ($algo) {
case 'DES':
$cipher = new DES(BlockCipher::MODE_CBC);
break;
case 'RC2':
$cipher = new RC2(BlockCipher::MODE_CBC);
break;
case '3-KeyTripleDES':
$cipher = new TripleDES(BlockCipher::MODE_CBC);
break;
case '2-KeyTripleDES':
$cipher = new TripleDES(BlockCipher::MODE_CBC);
$cipher->setKeyLength(128);
break;
case '128BitRC2':
$cipher = new RC2(BlockCipher::MODE_CBC);
$cipher->setKeyLength(128);
break;
case '40BitRC2':
$cipher = new RC2(BlockCipher::MODE_CBC);
$cipher->setKeyLength(40);
break;
case '128BitRC4':
$cipher = new RC4();
$cipher->setKeyLength(128);
break;
case '40BitRC4':
$cipher = new RC4();
$cipher->setKeyLength(40);
break;
default:
throw new UnsupportedAlgorithmException("$algo is not a supported algorithm");
}
return $cipher;
}
/**
* Returns a hash based on a PBES1 $algo
*
* @access public
* @param string $algo
*/
private static function getPBES1Hash($algo)
{
if (preg_match('#^pbeWith(MD2|MD5|SHA1|SHA)And.*?-CBC$#', $algo, $matches)) {
return $matches[1] == 'SHA' ? 'sha1' : $matches[1];
}
return 'sha1';
}
/**
* Returns a KDF baesd on a PBES1 $algo
*
* @access public
* @param string $algo
*/
private static function getPBES1KDF($algo)
{
switch ($algo) {
case 'pbeWithMD2AndDES-CBC':
case 'pbeWithMD2AndRC2-CBC':
case 'pbeWithMD5AndDES-CBC':
case 'pbeWithMD5AndRC2-CBC':
case 'pbeWithSHA1AndDES-CBC':
case 'pbeWithSHA1AndRC2-CBC':
return 'pbkdf1';
}
return 'pkcs12';
}
/**
* Returns a SymmetricKey object baesd on a PBES2 $algo
*
* @access public
* @param string $algo
*/
private static function getPBES2EncryptionObject($algo)
{
switch ($algo) {
case 'desCBC':
$cipher = new TripleDES(BlockCipher::MODE_CBC);
break;
case 'des-EDE3-CBC':
$cipher = new TripleDES(BlockCipher::MODE_CBC);
break;
case 'rc2CBC':
$cipher = new RC2(BlockCipher::MODE_CBC);
// in theory this can be changed
$cipher->setKeyLength(128);
break;
case 'rc5-CBC-PAD':
throw new UnsupportedAlgorithmException('rc5-CBC-PAD is not supported for PBES2 PKCS#8 keys');
case 'aes128-CBC-PAD':
case 'aes192-CBC-PAD':
case 'aes256-CBC-PAD':
$cipher = new AES(BlockCipher::MODE_CBC);
$cipher->setKeyLength(substr($algo, 3, 3));
break;
default:
throw new UnsupportedAlgorithmException("$algo is not supported");
}
return $cipher;
}
/**
* Initialize static variables
*
* @access private
*/
private static function initialize_static_variables()
{
if (!self::$oidsLoaded) {
// from https://tools.ietf.org/html/rfc2898
ASN1::loadOIDs([
// PBES1 encryption schemes
'1.2.840.113549.1.5.1' => 'pbeWithMD2AndDES-CBC',
'1.2.840.113549.1.5.4' => 'pbeWithMD2AndRC2-CBC',
'1.2.840.113549.1.5.3' => 'pbeWithMD5AndDES-CBC',
'1.2.840.113549.1.5.6' => 'pbeWithMD5AndRC2-CBC',
'1.2.840.113549.1.5.10'=> 'pbeWithSHA1AndDES-CBC',
'1.2.840.113549.1.5.11'=> 'pbeWithSHA1AndRC2-CBC',
// from PKCS#12:
// https://tools.ietf.org/html/rfc7292
'1.2.840.113549.1.12.1.1' => 'pbeWithSHAAnd128BitRC4',
'1.2.840.113549.1.12.1.2' => 'pbeWithSHAAnd40BitRC4',
'1.2.840.113549.1.12.1.3' => 'pbeWithSHAAnd3-KeyTripleDES-CBC',
'1.2.840.113549.1.12.1.4' => 'pbeWithSHAAnd2-KeyTripleDES-CBC',
'1.2.840.113549.1.12.1.5' => 'pbeWithSHAAnd128BitRC2-CBC',
'1.2.840.113549.1.12.1.6' => 'pbeWithSHAAnd40BitRC2-CBC',
'1.2.840.113549.1.5.12' => 'id-PBKDF2',
'1.2.840.113549.1.5.13' => 'id-PBES2',
'1.2.840.113549.1.5.14' => 'id-PBMAC1',
// from PKCS#5 v2.1:
// http://www.rsa.com/rsalabs/pkcs/files/h11302-wp-pkcs5v2-1-password-based-cryptography-standard.pdf
'1.2.840.113549.2.7' => 'id-hmacWithSHA1',
'1.2.840.113549.2.8' => 'id-hmacWithSHA224',
'1.2.840.113549.2.9' => 'id-hmacWithSHA256',
'1.2.840.113549.2.10'=> 'id-hmacWithSHA384',
'1.2.840.113549.2.11'=> 'id-hmacWithSHA512',
'1.2.840.113549.2.12'=> 'id-hmacWithSHA512-224',
'1.2.840.113549.2.13'=> 'id-hmacWithSHA512-256',
'1.3.14.3.2.7' => 'desCBC',
'1.2.840.113549.3.7' => 'des-EDE3-CBC',
'1.2.840.113549.3.2' => 'rc2CBC',
'1.2.840.113549.3.9' => 'rc5-CBC-PAD',
'2.16.840.1.101.3.4.1.2' => 'aes128-CBC-PAD',
'2.16.840.1.101.3.4.1.22'=> 'aes192-CBC-PAD',
'2.16.840.1.101.3.4.1.42'=> 'aes256-CBC-PAD'
]);
}
}
/**
* Break a public or private key down into its constituent components
*
* @access public
* @param string $key
* @param string $password optional
* @return array
*/
protected static function load($key, $password = '')
{
self::initialize_static_variables();
if (!is_string($key)) {
return false;
}
if (self::$format != self::MODE_DER) {
$decoded = ASN1::extractBER($key);
if ($decoded !== false) {
$key = $decoded;
} elseif (self::$format == self::MODE_PEM) {
return false;
}
}
$decoded = ASN1::decodeBER($key);
if (empty($decoded)) {
return false;
}
$meta = [];
$decrypted = ASN1::asn1map($decoded[0], Maps\EncryptedPrivateKeyInfo::MAP);
if (strlen($password) && is_array($decrypted)) {
$algorithm = $decrypted['encryptionAlgorithm']['algorithm'];
switch ($algorithm) {
// PBES1
case 'pbeWithMD2AndDES-CBC':
case 'pbeWithMD2AndRC2-CBC':
case 'pbeWithMD5AndDES-CBC':
case 'pbeWithMD5AndRC2-CBC':
case 'pbeWithSHA1AndDES-CBC':
case 'pbeWithSHA1AndRC2-CBC':
case 'pbeWithSHAAnd3-KeyTripleDES-CBC':
case 'pbeWithSHAAnd2-KeyTripleDES-CBC':
case 'pbeWithSHAAnd128BitRC2-CBC':
case 'pbeWithSHAAnd40BitRC2-CBC':
case 'pbeWithSHAAnd128BitRC4':
case 'pbeWithSHAAnd40BitRC4':
$cipher = self::getPBES1EncryptionObject($algorithm);
$hash = self::getPBES1Hash($algorithm);
$kdf = self::getPBES1KDF($algorithm);
$meta['meta']['algorithm'] = $algorithm;
$temp = ASN1::decodeBER($decrypted['encryptionAlgorithm']['parameters']);
extract(ASN1::asn1map($temp[0], Maps\PBEParameter::MAP));
$iterationCount = (int) $iterationCount->toString();
$cipher->setPassword($password, $kdf, $hash, $salt, $iterationCount);
$key = $cipher->decrypt($decrypted['encryptedData']);
$decoded = ASN1::decodeBER($key);
if (empty($decoded)) {
return false;
}
break;
case 'id-PBES2':
$meta['meta']['algorithm'] = $algorithm;
$temp = ASN1::decodeBER($decrypted['encryptionAlgorithm']['parameters']);
$temp = ASN1::asn1map($temp[0], Maps\PBES2params::MAP);
extract($temp);
$cipher = self::getPBES2EncryptionObject($encryptionScheme['algorithm']);
$meta['meta']['cipher'] = $encryptionScheme['algorithm'];
$temp = ASN1::decodeBER($decrypted['encryptionAlgorithm']['parameters']);
$temp = ASN1::asn1map($temp[0], Maps\PBES2params::MAP);
extract($temp);
if (!$cipher instanceof RC2) {
$cipher->setIV($encryptionScheme['parameters']['octetString']);
} else {
$temp = ASN1::decodeBER($encryptionScheme['parameters']);
extract(ASN1::asn1map($temp[0], Maps\RC2CBCParameter::MAP));
$effectiveKeyLength = (int) $rc2ParametersVersion->toString();
switch ($effectiveKeyLength) {
case 160:
$effectiveKeyLength = 40;
break;
case 120:
$effectiveKeyLength = 64;
break;
case 58:
$effectiveKeyLength = 128;
break;
//default: // should be >= 256
}
$cipher->setIV($iv);
$cipher->setKeyLength($effectiveKeyLength);
}
$meta['meta']['keyDerivationFunc'] = $keyDerivationFunc['algorithm'];
switch ($keyDerivationFunc['algorithm']) {
case 'id-PBKDF2':
$temp = ASN1::decodeBER($keyDerivationFunc['parameters']);
$prf = ['algorithm' => 'id-hmacWithSHA1'];
$params = ASN1::asn1map($temp[0], Maps\PBKDF2params::MAP);
extract($params);
$meta['meta']['prf'] = $prf['algorithm'];
$hash = str_replace('-', '/', substr($prf['algorithm'], 11));
$params = [
$password,
'pbkdf2',
$hash,
$salt,
(int) $iterationCount->toString()
];
if (isset($keyLength)) {
$params[] = (int) $keyLength->toString();
}
call_user_func_array([$cipher, 'setPassword'], $params);
$key = $cipher->decrypt($decrypted['encryptedData']);
$decoded = ASN1::decodeBER($key);
if (empty($decoded)) {
return false;
}
break;
default:
throw new UnsupportedAlgorithmException('Only PBKDF2 is supported for PBES2 PKCS#8 keys');
}
break;
case 'id-PBMAC1':
//$temp = ASN1::decodeBER($decrypted['encryptionAlgorithm']['parameters']);
//$value = ASN1::asn1map($temp[0], Maps\PBMAC1params::MAP);
// since i can't find any implementation that does PBMAC1 it is unsupported
throw new UnsupportedAlgorithmException('Only PBES1 and PBES2 PKCS#8 keys are supported.');
// at this point we'll assume that the key conforms to PublicKeyInfo
}
}
$private = ASN1::asn1map($decoded[0], Maps\PrivateKeyInfo::MAP);
if (is_array($private)) {
return $private + $meta;
}
// EncryptedPrivateKeyInfo and PublicKeyInfo have largely identical "signatures". the only difference
// is that the former has an octet string and the later has a bit string. the first byte of a bit
// string represents the number of bits in the last byte that are to be ignored but, currently,
// bit strings wanting a non-zero amount of bits trimmed are not supported
$public = ASN1::asn1map($decoded[0], Maps\PublicKeyInfo::MAP);
if (is_array($public)) {
if ($public['publicKey'][0] != "\0") {
return false;
}
$public['publicKey'] = substr($public['publicKey'], 1);
return $public;
}
return false;
}
/**
* Wrap a private key appropriately
*
* @access public
* @param string $algorithm
* @param string $key
* @param string $attr
* @param string $password
* @return string
*/
protected static function wrapPrivateKey($key, $algorithm, $attr, $password)
{
self::initialize_static_variables();
$key = [
'version' => 'v1',
'privateKeyAlgorithm' => ['algorithm' => $algorithm], // parameters are not currently supported
'privateKey' => $key
];
if (!empty($attr)) {
$key['attributes'] = $attr;
}
$key = ASN1::encodeDER($key, Maps\PrivateKeyInfo::MAP);
if (!empty($password) && is_string($password)) {
$salt = Random::string(8);
$iterationCount = self::$defaultIterationCount;
if (self::$defaultEncryptionAlgorithm == 'id-PBES2') {
$crypto = self::getPBES2EncryptionObject(self::$defaultEncryptionScheme);
$hash = str_replace('-', '/', substr(self::$defaultPRF, 11));
$kdf = 'pbkdf2';
$iv = Random::string($crypto->getBlockLength() >> 3);
$PBKDF2params = [
'salt' => $salt,
'iterationCount' => $iterationCount,
'prf' => ['algorithm' => self::$defaultPRF, 'parameters' => null]
];
$PBKDF2params = ASN1::encodeDER($PBKDF2params, Maps\PBKDF2params::MAP);
if (!$crypto instanceof RC2) {
$params = ['octetString' => $iv];
} else {
$params = [
'rc2ParametersVersion' => 58,
'iv' => $iv
];
$params = ASN1::encodeDER($params, Maps\RC2CBCParameter::MAP);
$params = new ASN1\Element($params);
}
$params = [
'keyDerivationFunc' => [
'algorithm' => 'id-PBKDF2',
'parameters' => new ASN1\Element($PBKDF2params)
],
'encryptionScheme' => [
'algorithm' => self::$defaultEncryptionScheme,
'parameters' => $params
]
];
$params = ASN1::encodeDER($params, Maps\PBES2params::MAP);
$crypto->setIV($iv);
} else {
$crypto = self::getPBES1EncryptionObject(self::$defaultEncryptionAlgorithm);
$hash = self::getPBES1Hash(self::$defaultEncryptionAlgorithm);
$kdf = self::getPBES1KDF(self::$defaultEncryptionAlgorithm);
$params = [
'salt' => $salt,
'iterationCount' => $iterationCount
];
$params = ASN1::encodeDER($params, Maps\PBEParameter::MAP);
}
$crypto->setPassword($password, $kdf, $hash, $salt, $iterationCount);
$key = $crypto->encrypt($key);
$key = [
'encryptionAlgorithm' => [
'algorithm' => self::$defaultEncryptionAlgorithm,
'parameters' => new ASN1\Element($params)
],
'encryptedData' => $key
];
$key = ASN1::encodeDER($key, Maps\EncryptedPrivateKeyInfo::MAP);
return "-----BEGIN ENCRYPTED PRIVATE KEY-----\r\n" .
chunk_split(Base64::encode($key), 64) .
"-----END ENCRYPTED PRIVATE KEY-----";
}
return "-----BEGIN PRIVATE KEY-----\r\n" .
chunk_split(Base64::encode($key), 64) .
"-----END PRIVATE KEY-----";
}
/**
* Wrap a public key appropriately
*
* @access public
* @param string $key
* @return string
*/
protected static function wrapPublicKey($key, $algorithm)
{
self::initialize_static_variables();
$key = [
'publicKeyAlgorithm' => [
'algorithm' => $algorithm,
'parameters' => null // parameters are not currently supported
],
'publicKey' => "\0" . $key
];
$key = ASN1::encodeDER($key, Maps\PublicKeyInfo::MAP);
return "-----BEGIN PUBLIC KEY-----\r\n" .
chunk_split(Base64::encode($key), 64) .
"-----END PUBLIC KEY-----";
}
}