<?php
// USAGE: php examples/deASCIIdeCrypt.php secretkey.asc password message.asc
// This will fail if the algo on key or message is not 3DES or AES
require_once dirname(__FILE__) . '/../lib/openpgp.php';
require_once dirname(__FILE__) . '/../lib/openpgp_crypt_rsa.php';
require_once dirname(__FILE__) . '/../lib/openpgp_crypt_symmetric.php';
$keyASCII = file_get_contents($argv[1]);
$msgASCII = file_get_contents($argv[3]);
$keyEncrypted = OpenPGP_Message::parse(OpenPGP::unarmor($keyASCII, 'PGP PRIVATE KEY BLOCK'));
// Try each secret key packet
foreach ($keyEncrypted as $p) {
if (!$p instanceof OpenPGP_SecretKeyPacket) {
continue;
}
$key = OpenPGP_Crypt_Symmetric::decryptSecretKey($argv[2], $p);
$msg = OpenPGP_Message::parse(OpenPGP::unarmor($msgASCII, 'PGP MESSAGE'));
$decryptor = new OpenPGP_Crypt_RSA($key);
$decrypted = $decryptor->decrypt($msg);
var_dump($decrypted);
}
<?php
require_once dirname(__FILE__) . '/../lib/openpgp.php';
require_once dirname(__FILE__) . '/../lib/openpgp_crypt_rsa.php';
require_once dirname(__FILE__) . '/../lib/openpgp_crypt_symmetric.php';
$key = OpenPGP_Message::parse(file_get_contents(dirname(__FILE__) . '/../tests/data/helloKey.gpg'));
$data = new OpenPGP_LiteralDataPacket('This is text.', array('format' => 'u', 'filename' => 'stuff.txt'));
$encrypted = OpenPGP_Crypt_Symmetric::encrypt($key, new OpenPGP_Message(array($data)));
// Now decrypt it with the same key
$decryptor = new OpenPGP_Crypt_RSA($key);
$decrypted = $decryptor->decrypt($encrypted);
var_dump($decrypted);
public function testEncryptAsymmetric()
{
$key = OpenPGP_Message::parse(file_get_contents(dirname(__FILE__) . '/data/helloKey.gpg'));
$data = new OpenPGP_LiteralDataPacket('This is text.', array('format' => 'u', 'filename' => 'stuff.txt'));
$encrypted = OpenPGP_Crypt_Symmetric::encrypt($key, new OpenPGP_Message(array($data)));
$decryptor = new OpenPGP_Crypt_RSA($key);
$decrypted = $decryptor->decrypt($encrypted);
$this->assertEquals($decrypted[0]->data, 'This is text.');
}
/**
*/
public function decrypt($msg, $key)
{
$decryptor = new OpenPGP_Crypt_RSA($key->message);
$elgamal = null;
foreach ($msg->message as $val) {
if ($val instanceof OpenPGP_AsymmetricSessionKeyPacket) {
$pkey = $decryptor->key($val->keyid);
if (!$pkey instanceof OpenPGP_PublicKeyPacket) {
continue;
}
switch ($pkey->algorithm) {
case 1:
case 2:
return new Horde_Pgp_Element_Message($decryptor->decrypt($msg->message));
case 16:
$elgamal = new Horde_Pgp_Crypt_Elgamal($pkey);
/* Put encrypted data into a packet object to take
* advantage of built-in MPI read methods. */
$edata = new OpenPGP_Packet();
$edata->input = $val->encrypted_data;
$sk_data = $elgamal->decrypt($edata->read_mpi() . $edata->read_mpi());
$sk = substr($sk_data, 1, strlen($sk_data) - 3);
/* Last 2 bytes are checksum */
$chk = unpack('n', substr($sk_data, -2));
$chk = reset($chk);
$sk_chk = 0;
for ($i = 0, $j = strlen($sk); $i < $j; ++$i) {
$sk_chk = ($sk_chk + ord($sk[$i])) % 65536;
}
if ($sk_chk != $chk) {
throw new RuntimeException();
}
return new Horde_Pgp_Element_Message(OpenPGP_Crypt_Symmetric::decryptPacket(OpenPGP_Crypt_Symmetric::getEncryptedData($msg->message), ord($sk_data[0]), $sk));
}
}
}
throw new RuntimeException();
}
