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Generalize S2K support, and support SymmetricSessionKeyPacket

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This commit is contained in:
Stephen Paul Weber 2013-01-21 15:20:23 -05:00
parent 74afee6266
commit dffa0ecaa2
2 changed files with 70 additions and 16 deletions
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78
lib/openpgp.php
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@ -110,6 +110,52 @@ class OpenPGP {
}
}
class OpenPGP_S2K {
public $type, $hash_algorithm, $salt, $count;
static function parse(&$input) {
$s2k = new OpenPGP_S2k();
switch($s2k->type = ord($input{0})) {
case 0:
$s2k->hash_algorithm = ord($input{1});
$input = substr($input, 2);
break;
case 1:
$s2k->hash_algorithm = ord($input{1});
$s2k->salt = substr($input, 2, 8);
$input = substr($input, 10);
break;
case 3:
$s2k->hash_algorithm = ord($input{1});
$s2k->salt = substr($input, 2, 8);
$s2k->count = OpenPGP::decode_s2k_count($input{9});
$input = substr($input, 11);
break;
}
return $s2k;
}
function to_bytes() {
$bytes = chr($this->type);
switch($this->type) {
case 0:
$bytes .= chr($this->hash_algorithm);
break;
case 1:
$bytes .= chr($this->hash_algorithm);
$bytes .= $this->salt;
break;
case 3:
$bytes .= chr($this->hash_algorithm);
$bytes .= $this->salt;
$bytes .= chr(OpenPGP::encode_s2k_count($this->count));
break;
}
return $bytes;
}
}
//////////////////////////////////////////////////////////////////////////////
// OpenPGP messages
@ -1121,7 +1167,19 @@ class OpenPGP_SignaturePacket_EmbeddedSignaturePacket extends OpenPGP_SignatureP
* @see http://tools.ietf.org/html/rfc4880#section-5.3
*/
class OpenPGP_SymmetricSessionKeyPacket extends OpenPGP_Packet {
// TODO
public $version, $symmetric_algorithm, $s2k, $encrypted_data;
function read() {
$this->version = ord($this->read_byte());
$this->symmetric_algorithm = ord($this->read_byte());
$this->s2k = OpenPGP_S2k::parse($this->input);
$this->encrypted_data = $this->input;
}
function body() {
return chr($this->version) . chr($this->symmetric_algorithm) .
$this->s2k->to_bytes() . $this->encrypted_data;
}
}
/**
@ -1335,18 +1393,13 @@ class OpenPGP_PublicSubkeyPacket extends OpenPGP_PublicKeyPacket {
* @see http://tools.ietf.org/html/rfc4880#section-12
*/
class OpenPGP_SecretKeyPacket extends OpenPGP_PublicKeyPacket {
public $s2k_useage, $s2k_type, $s2k_hash_algorithm, $s2k_salt, $s2k_count, $symmetric_type, $private_hash, $encrypted_data;
public $s2k_useage, $s2k, $symmetric_type, $private_hash, $encrypted_data;
function read() {
parent::read(); // All the fields from PublicKey
$this->s2k_useage = ord($this->read_byte());
if($this->s2k_useage == 255 || $this->s2k_useage == 254) {
$this->symmetric_type = ord($this->read_byte());
$this->s2k_type = ord($this->read_byte());
$this->s2k_hash_algorithm = ord($this->read_byte());
if($this->s2k_type == 1 || $this->s2k_type == 3) $this->s2k_salt = $this->read_bytes(8);
if($this->s2k_type == 3) {
$this->s2k_count = OpenPGP::decode_s2k_count(ord($this->read_byte()));
}
$this->s2k = OpenPGP_S2k::parse($this->input);
} else if($this->s2k_useage > 0) {
$this->symmetric_type = $this->s2k_useage;
}
@ -1390,14 +1443,7 @@ class OpenPGP_SecretKeyPacket extends OpenPGP_PublicKeyPacket {
$secret_material = NULL;
if($this->s2k_useage == 255 || $this->s2k_useage == 254) {
$bytes .= chr($this->symmetric_type);
$bytes .= chr($this->s2k_type);
$bytes .= chr($this->s2k_hash_algorithm);
if($this->s2k_type == 1 || $this->s2k_type == 3) {
$bytes .= $this->s2k_salt;
}
if($this->s2k_type == 3) {
$bytes .= chr(OpenPGP::encode_s2k_count($this->s2k_count));
}
$bytes .= $this->s2k->to_bytes();
}
if($this->s2k_useage > 0) {
$bytes .= $this->encrypted_data;

8
tests/suite.php
View File

@ -366,6 +366,14 @@ class Serialization extends PHPUnit_Framework_TestCase {
public function testuncompressedopsrsagpg() {
$this->oneSerialization("uncompressed-ops-rsa.gpg");
}
public function testSymmetricAES() {
$this->oneSerialization("symmetric-aes.gpg");
}
public function testSymmetricNoMDC() {
$this->oneSerialization("symmetric-no-mdc.gpg");
}
}
class Fingerprint extends PHPUnit_Framework_TestCase {