mirror of
https://git.friendi.ca/friendica/friendica-addons.git
synced 2024-11-14 16:02:53 +00:00
1855 lines
54 KiB
PHP
1855 lines
54 KiB
PHP
|
<?php
|
||
|
// This is free and unencumbered software released into the public domain.
|
||
|
/**
|
||
|
* OpenPGP.php is a pure-PHP implementation of the OpenPGP Message Format
|
||
|
* (RFC 4880).
|
||
|
*
|
||
|
* @package OpenPGP
|
||
|
* @version 0.0.1
|
||
|
* @author Arto Bendiken <arto.bendiken@gmail.com>
|
||
|
* @author Stephen Paul Weber <singpolyma@singpolyma.net>
|
||
|
* @see http://github.com/bendiken/openpgp-php
|
||
|
*/
|
||
|
|
||
|
//////////////////////////////////////////////////////////////////////////////
|
||
|
// OpenPGP utilities
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880
|
||
|
*/
|
||
|
class OpenPGP {
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-6
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-6.2
|
||
|
* @see http://tools.ietf.org/html/rfc2045
|
||
|
*/
|
||
|
static function enarmor($data, $marker = 'MESSAGE', array $headers = array()) {
|
||
|
$text = self::header($marker) . "\n";
|
||
|
foreach ($headers as $key => $value) {
|
||
|
$text .= $key . ': ' . (string)$value . "\n";
|
||
|
}
|
||
|
$text .= "\n" . base64_encode($data);
|
||
|
$text .= "\n".'=' . base64_encode(substr(pack('N', self::crc24($data)), 1)) . "\n";
|
||
|
$text .= self::footer($marker) . "\n";
|
||
|
return $text;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-6
|
||
|
* @see http://tools.ietf.org/html/rfc2045
|
||
|
*/
|
||
|
static function unarmor($text, $header = 'PGP PUBLIC KEY BLOCK') {
|
||
|
$header = self::header($header);
|
||
|
$text = str_replace(array("\r\n", "\r"), array("\n", ''), $text);
|
||
|
if (($pos1 = strpos($text, $header)) !== FALSE &&
|
||
|
($pos1 = strpos($text, "\n\n", $pos1 += strlen($header))) !== FALSE &&
|
||
|
($pos2 = strpos($text, "\n=", $pos1 += 2)) !== FALSE) {
|
||
|
return base64_decode($text = substr($text, $pos1, $pos2 - $pos1));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-6.2
|
||
|
*/
|
||
|
static function header($marker) {
|
||
|
return '-----BEGIN ' . strtoupper((string)$marker) . '-----';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-6.2
|
||
|
*/
|
||
|
static function footer($marker) {
|
||
|
return '-----END ' . strtoupper((string)$marker) . '-----';
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-6
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-6.1
|
||
|
*/
|
||
|
static function crc24($data) {
|
||
|
$crc = 0x00b704ce;
|
||
|
for ($i = 0; $i < strlen($data); $i++) {
|
||
|
$crc ^= (ord($data[$i]) & 255) << 16;
|
||
|
for ($j = 0; $j < 8; $j++) {
|
||
|
$crc <<= 1;
|
||
|
if ($crc & 0x01000000) {
|
||
|
$crc ^= 0x01864cfb;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return $crc & 0x00ffffff;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-12.2
|
||
|
*/
|
||
|
static function bitlength($data) {
|
||
|
return (strlen($data) - 1) * 8 + (int)floor(log(ord($data[0]), 2)) + 1;
|
||
|
}
|
||
|
|
||
|
static function decode_s2k_count($c) {
|
||
|
return ((int)16 + ($c & 15)) << (($c >> 4) + 6);
|
||
|
}
|
||
|
|
||
|
static function encode_s2k_count($iterations) {
|
||
|
if($iterations >= 65011712) return 255;
|
||
|
|
||
|
$count = $iterations >> 6;
|
||
|
$c = 0;
|
||
|
while($count >= 32) {
|
||
|
$count = $count >> 1;
|
||
|
$c++;
|
||
|
}
|
||
|
$result = ($c << 4) | ($count - 16);
|
||
|
|
||
|
if(OpenPGP::decode_s2k_count($result) < $iterations) {
|
||
|
return $result + 1;
|
||
|
}
|
||
|
|
||
|
return $result;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_S2K {
|
||
|
public $type, $hash_algorithm, $salt, $count;
|
||
|
|
||
|
function __construct($salt='BADSALT', $hash_algorithm=10, $count=65536, $type=3) {
|
||
|
$this->type = $type;
|
||
|
$this->hash_algorithm = $hash_algorithm;
|
||
|
$this->salt = $salt;
|
||
|
$this->count = $count;
|
||
|
}
|
||
|
|
||
|
static function parse(&$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);
|
||
|
$s2k->count = OpenPGP::decode_s2k_count(ord($input{10}));
|
||
|
$input = substr($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 $bytes;
|
||
|
}
|
||
|
|
||
|
function raw_hash($s) {
|
||
|
return hash(strtolower(OpenPGP_SignaturePacket::$hash_algorithms[$this->hash_algorithm]), $s, true);
|
||
|
}
|
||
|
|
||
|
function sized_hash($s, $size) {
|
||
|
$hash = $this->raw_hash($s);
|
||
|
while(strlen($hash) < $size) {
|
||
|
$s = "\0" . $s;
|
||
|
$hash .= $this->raw_hash($s);
|
||
|
}
|
||
|
|
||
|
return substr($hash, 0, $size);
|
||
|
}
|
||
|
|
||
|
function iterate($s) {
|
||
|
if(strlen($s) >= $this->count) return $s;
|
||
|
$s = str_repeat($s, ceil($this->count / strlen($s)));
|
||
|
return substr($s, 0, $this->count);
|
||
|
}
|
||
|
|
||
|
function make_key($pass, $size) {
|
||
|
switch($this->type) {
|
||
|
case 0:
|
||
|
return $this->sized_hash($pass, $size);
|
||
|
case 1:
|
||
|
return $this->sized_hash($this->salt . $pass, $size);
|
||
|
case 3:
|
||
|
return $this->sized_hash($this->iterate($this->salt . $pass), $size);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
//////////////////////////////////////////////////////////////////////////////
|
||
|
// OpenPGP messages
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.1
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-11
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-11.3
|
||
|
*/
|
||
|
class OpenPGP_Message implements IteratorAggregate, ArrayAccess {
|
||
|
public $uri = NULL;
|
||
|
public $packets = array();
|
||
|
|
||
|
static function parse_file($path) {
|
||
|
if (($msg = self::parse(file_get_contents($path)))) {
|
||
|
$msg->uri = preg_match('!^[\w\d]+://!', $path) ? $path : 'file://' . realpath($path);
|
||
|
return $msg;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.1
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.2
|
||
|
*/
|
||
|
static function parse($input) {
|
||
|
if (is_resource($input)) {
|
||
|
return self::parse_stream($input);
|
||
|
}
|
||
|
if (is_string($input)) {
|
||
|
return self::parse_string($input);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static function parse_stream($input) {
|
||
|
return self::parse_string(stream_get_contents($input));
|
||
|
}
|
||
|
|
||
|
static function parse_string($input) {
|
||
|
$msg = new self;
|
||
|
while (($length = strlen($input)) > 0) {
|
||
|
if (($packet = OpenPGP_Packet::parse($input))) {
|
||
|
$msg[] = $packet;
|
||
|
}
|
||
|
if ($length == strlen($input)) { // is parsing stuck?
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
return $msg;
|
||
|
}
|
||
|
|
||
|
function __construct(array $packets = array()) {
|
||
|
$this->packets = $packets;
|
||
|
}
|
||
|
|
||
|
function to_bytes() {
|
||
|
$bytes = '';
|
||
|
foreach($this as $p) {
|
||
|
$bytes .= $p->to_bytes();
|
||
|
}
|
||
|
return $bytes;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Extract signed objects from a well-formatted message
|
||
|
*
|
||
|
* Recurses into CompressedDataPacket
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-11
|
||
|
*/
|
||
|
function signatures() {
|
||
|
$msg = $this;
|
||
|
while($msg[0] instanceof OpenPGP_CompressedDataPacket) $msg = $msg[0]->data;
|
||
|
|
||
|
$key = NULL;
|
||
|
$userid = NULL;
|
||
|
$subkey = NULL;
|
||
|
$sigs = array();
|
||
|
$final_sigs = array();
|
||
|
|
||
|
foreach($msg as $idx => $p) {
|
||
|
if($p instanceof OpenPGP_LiteralDataPacket) {
|
||
|
return array(array($p, array_values(array_filter($msg->packets, function($p) {
|
||
|
return $p instanceof OpenPGP_SignaturePacket;
|
||
|
}))));
|
||
|
} else if($p instanceof OpenPGP_PublicSubkeyPacket || $p instanceof OpenPGP_SecretSubkeyPacket) {
|
||
|
if($userid) {
|
||
|
array_push($final_sigs, array($key, $userid, $sigs));
|
||
|
$userid = NULL;
|
||
|
} else if($subkey) {
|
||
|
array_push($final_sigs, array($key, $subkey, $sigs));
|
||
|
$key = NULL;
|
||
|
}
|
||
|
$sigs = array();
|
||
|
$subkey = $p;
|
||
|
} else if($p instanceof OpenPGP_PublicKeyPacket) {
|
||
|
if($userid) {
|
||
|
array_push($final_sigs, array($key, $userid, $sigs));
|
||
|
$userid = NULL;
|
||
|
} else if($subkey) {
|
||
|
array_push($final_sigs, array($key, $subkey, $sigs));
|
||
|
$subkey = NULL;
|
||
|
} else if($key) {
|
||
|
array_push($final_sigs, array($key, $sigs));
|
||
|
$key = NULL;
|
||
|
}
|
||
|
$sigs = array();
|
||
|
$key = $p;
|
||
|
} else if($p instanceof OpenPGP_UserIDPacket) {
|
||
|
if($userid) {
|
||
|
array_push($final_sigs, array($key, $userid, $sigs));
|
||
|
$userid = NULL;
|
||
|
} else if($key) {
|
||
|
array_push($final_sigs, array($key, $sigs));
|
||
|
}
|
||
|
$sigs = array();
|
||
|
$userid = $p;
|
||
|
} else if($p instanceof OpenPGP_SignaturePacket) {
|
||
|
$sigs[] = $p;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if($userid) {
|
||
|
array_push($final_sigs, array($key, $userid, $sigs));
|
||
|
} else if($subkey) {
|
||
|
array_push($final_sigs, array($key, $subkey, $sigs));
|
||
|
} else if($key) {
|
||
|
array_push($final_sigs, array($key, $sigs));
|
||
|
}
|
||
|
|
||
|
return $final_sigs;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Function to extract verified signatures
|
||
|
* $verifiers is an array of callbacks formatted like array('RSA' => array('SHA256' => CALLBACK)) that take two parameters: raw message and signature packet
|
||
|
*/
|
||
|
function verified_signatures($verifiers) {
|
||
|
$signed = $this->signatures();
|
||
|
$vsigned = array();
|
||
|
|
||
|
foreach($signed as $sign) {
|
||
|
$signatures = array_pop($sign);
|
||
|
$vsigs = array();
|
||
|
|
||
|
foreach($signatures as $sig) {
|
||
|
$verifier = $verifiers[$sig->key_algorithm_name()][$sig->hash_algorithm_name()];
|
||
|
if($verifier && $this->verify_one($verifier, $sign, $sig)) {
|
||
|
$vsigs[] = $sig;
|
||
|
}
|
||
|
}
|
||
|
array_push($sign, $vsigs);
|
||
|
$vsigned[] = $sign;
|
||
|
}
|
||
|
|
||
|
return $vsigned;
|
||
|
}
|
||
|
|
||
|
function verify_one($verifier, $sign, $sig) {
|
||
|
if($sign[0] instanceof OpenPGP_LiteralDataPacket) {
|
||
|
$sign[0]->normalize();
|
||
|
$raw = $sign[0]->data;
|
||
|
} else if(isset($sign[1]) && $sign[1] instanceof OpenPGP_UserIDPacket) {
|
||
|
$raw = implode('', array_merge($sign[0]->fingerprint_material(), array(chr(0xB4),
|
||
|
pack('N', strlen($sign[1]->body())), $sign[1]->body())));
|
||
|
} else if(isset($sign[1]) && ($sign[1] instanceof OpenPGP_PublicSubkeyPacket || $sign[1] instanceof OpenPGP_SecretSubkeyPacket)) {
|
||
|
$raw = implode('', array_merge($sign[0]->fingerprint_material(), $sign[1]->fingerprint_material()));
|
||
|
} else if($sign[0] instanceof OpenPGP_PublicKeyPacket) {
|
||
|
$raw = implode('', $sign[0]->fingerprint_material());
|
||
|
} else {
|
||
|
return NULL;
|
||
|
}
|
||
|
return call_user_func($verifier, $raw.$sig->trailer, $sig);
|
||
|
}
|
||
|
|
||
|
// IteratorAggregate interface
|
||
|
|
||
|
function getIterator() {
|
||
|
return new ArrayIterator($this->packets);
|
||
|
}
|
||
|
|
||
|
// ArrayAccess interface
|
||
|
|
||
|
function offsetExists($offset) {
|
||
|
return isset($this->packets[$offset]);
|
||
|
}
|
||
|
|
||
|
function offsetGet($offset) {
|
||
|
return $this->packets[$offset];
|
||
|
}
|
||
|
|
||
|
function offsetSet($offset, $value) {
|
||
|
return is_null($offset) ? $this->packets[] = $value : $this->packets[$offset] = $value;
|
||
|
}
|
||
|
|
||
|
function offsetUnset($offset) {
|
||
|
unset($this->packets[$offset]);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
//////////////////////////////////////////////////////////////////////////////
|
||
|
// OpenPGP packets
|
||
|
|
||
|
/**
|
||
|
* OpenPGP packet.
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.1
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.3
|
||
|
*/
|
||
|
class OpenPGP_Packet {
|
||
|
public $tag, $size, $data;
|
||
|
|
||
|
static function class_for($tag) {
|
||
|
return isset(self::$tags[$tag]) && class_exists(
|
||
|
$class = 'OpenPGP_' . self::$tags[$tag] . 'Packet') ? $class : __CLASS__;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Parses an OpenPGP packet.
|
||
|
*
|
||
|
* Partial body lengths based on https://github.com/toofishes/python-pgpdump/blob/master/pgpdump/packet.py
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.2
|
||
|
*/
|
||
|
static function parse(&$input) {
|
||
|
$packet = NULL;
|
||
|
if (strlen($input) > 0) {
|
||
|
$parser = ord($input[0]) & 64 ? 'parse_new_format' : 'parse_old_format';
|
||
|
|
||
|
$header_start0 = 0;
|
||
|
$consumed = 0;
|
||
|
$packet_data = "";
|
||
|
do {
|
||
|
list($tag, $data_offset, $data_length, $partial) = self::$parser($input, $header_start0);
|
||
|
|
||
|
$data_start0 = $header_start0 + $data_offset;
|
||
|
$header_start0 = $data_start0 + $data_length - 1;
|
||
|
$packet_data .= substr($input, $data_start0, $data_length);
|
||
|
|
||
|
$consumed += $data_offset + $data_length;
|
||
|
if ($partial) {
|
||
|
$consumed -= 1;
|
||
|
}
|
||
|
} while ($partial === true && $parser === 'parse_new_format');
|
||
|
|
||
|
if ($tag && ($class = self::class_for($tag))) {
|
||
|
$packet = new $class();
|
||
|
$packet->tag = $tag;
|
||
|
$packet->input = $packet_data;
|
||
|
$packet->length = strlen($packet_data);
|
||
|
$packet->read();
|
||
|
unset($packet->input);
|
||
|
unset($packet->length);
|
||
|
}
|
||
|
$input = substr($input, $consumed);
|
||
|
}
|
||
|
return $packet;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Parses a new-format (RFC 4880) OpenPGP packet.
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.2.2
|
||
|
*/
|
||
|
static function parse_new_format($input, $header_start = 0) {
|
||
|
$tag = ord($input[0]) & 63;
|
||
|
$len = ord($input[$header_start + 1]);
|
||
|
if($len < 192) { // One octet length
|
||
|
return array($tag, 2, $len, false);
|
||
|
}
|
||
|
if($len > 191 && $len < 224) { // Two octet length
|
||
|
return array($tag, 3, (($len - 192) << 8) + ord($input[$header_start + 2]) + 192, false);
|
||
|
}
|
||
|
if($len == 255) { // Five octet length
|
||
|
$unpacked = unpack('N', substr($input, $header_start + 2, 4));
|
||
|
return array($tag, 6, reset($unpacked), false);
|
||
|
}
|
||
|
// Partial body lengths
|
||
|
return array($tag, 2, 1 << ($len & 0x1f), true);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Parses an old-format (PGP 2.6.x) OpenPGP packet.
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.2.1
|
||
|
*/
|
||
|
static function parse_old_format($input) {
|
||
|
$len = ($tag = ord($input[0])) & 3;
|
||
|
$tag = ($tag >> 2) & 15;
|
||
|
switch ($len) {
|
||
|
case 0: // The packet has a one-octet length. The header is 2 octets long.
|
||
|
$head_length = 2;
|
||
|
$data_length = ord($input[1]);
|
||
|
break;
|
||
|
case 1: // The packet has a two-octet length. The header is 3 octets long.
|
||
|
$head_length = 3;
|
||
|
$data_length = unpack('n', substr($input, 1, 2));
|
||
|
$data_length = $data_length[1];
|
||
|
break;
|
||
|
case 2: // The packet has a four-octet length. The header is 5 octets long.
|
||
|
$head_length = 5;
|
||
|
$data_length = unpack('N', substr($input, 1, 4));
|
||
|
$data_length = $data_length[1];
|
||
|
break;
|
||
|
case 3: // The packet is of indeterminate length. The header is 1 octet long.
|
||
|
$head_length = 1;
|
||
|
$data_length = strlen($input) - $head_length;
|
||
|
break;
|
||
|
}
|
||
|
return array($tag, $head_length, $data_length, false);
|
||
|
}
|
||
|
|
||
|
function __construct($data=NULL) {
|
||
|
$this->tag = array_search(substr(substr(get_class($this), 8), 0, -6), self::$tags);
|
||
|
$this->data = $data;
|
||
|
}
|
||
|
|
||
|
function read() {
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data; // Will normally be overridden by subclasses
|
||
|
}
|
||
|
|
||
|
function header_and_body() {
|
||
|
$body = $this->body(); // Get body first, we will need it's length
|
||
|
$tag = chr($this->tag | 0xC0); // First two bits are 1 for new packet format
|
||
|
$size = chr(255).pack('N', strlen($body)); // Use 5-octet lengths
|
||
|
return array('header' => $tag.$size, 'body' => $body);
|
||
|
}
|
||
|
|
||
|
function to_bytes() {
|
||
|
$data = $this->header_and_body();
|
||
|
return $data['header'].$data['body'];
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-3.5
|
||
|
*/
|
||
|
function read_timestamp() {
|
||
|
return $this->read_unpacked(4, 'N');
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-3.2
|
||
|
*/
|
||
|
function read_mpi() {
|
||
|
$length = $this->read_unpacked(2, 'n'); // length in bits
|
||
|
$length = (int)floor(($length + 7) / 8); // length in bytes
|
||
|
return $this->read_bytes($length);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://php.net/manual/en/function.unpack.php
|
||
|
*/
|
||
|
function read_unpacked($count, $format) {
|
||
|
$unpacked = unpack($format, $this->read_bytes($count));
|
||
|
return reset($unpacked);
|
||
|
}
|
||
|
|
||
|
function read_byte() {
|
||
|
return ($bytes = $this->read_bytes()) ? $bytes[0] : NULL;
|
||
|
}
|
||
|
|
||
|
function read_bytes($count = 1) {
|
||
|
$bytes = substr($this->input, 0, $count);
|
||
|
$this->input = substr($this->input, $count);
|
||
|
return $bytes;
|
||
|
}
|
||
|
|
||
|
static $tags = array(
|
||
|
1 => 'AsymmetricSessionKey', // Public-Key Encrypted Session Key
|
||
|
2 => 'Signature', // Signature Packet
|
||
|
3 => 'SymmetricSessionKey', // Symmetric-Key Encrypted Session Key Packet
|
||
|
4 => 'OnePassSignature', // One-Pass Signature Packet
|
||
|
5 => 'SecretKey', // Secret-Key Packet
|
||
|
6 => 'PublicKey', // Public-Key Packet
|
||
|
7 => 'SecretSubkey', // Secret-Subkey Packet
|
||
|
8 => 'CompressedData', // Compressed Data Packet
|
||
|
9 => 'EncryptedData', // Symmetrically Encrypted Data Packet
|
||
|
10 => 'Marker', // Marker Packet
|
||
|
11 => 'LiteralData', // Literal Data Packet
|
||
|
12 => 'Trust', // Trust Packet
|
||
|
13 => 'UserID', // User ID Packet
|
||
|
14 => 'PublicSubkey', // Public-Subkey Packet
|
||
|
17 => 'UserAttribute', // User Attribute Packet
|
||
|
18 => 'IntegrityProtectedData', // Sym. Encrypted and Integrity Protected Data Packet
|
||
|
19 => 'ModificationDetectionCode', // Modification Detection Code Packet
|
||
|
60 => 'Experimental', // Private or Experimental Values
|
||
|
61 => 'Experimental', // Private or Experimental Values
|
||
|
62 => 'Experimental', // Private or Experimental Values
|
||
|
63 => 'Experimental', // Private or Experimental Values
|
||
|
);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Public-Key Encrypted Session Key packet (tag 1).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.1
|
||
|
*/
|
||
|
class OpenPGP_AsymmetricSessionKeyPacket extends OpenPGP_Packet {
|
||
|
public $version, $keyid, $key_algorithm, $encrypted_data;
|
||
|
|
||
|
function __construct($key_algorithm='', $keyid='', $encrypted_data='', $version=3) {
|
||
|
parent::__construct();
|
||
|
$this->version = $version;
|
||
|
$this->keyid = substr($keyid, -16);
|
||
|
$this->key_algorithm = $key_algorithm;
|
||
|
$this->encrypted_data = $encrypted_data;
|
||
|
}
|
||
|
|
||
|
function read() {
|
||
|
switch($this->version = ord($this->read_byte())) {
|
||
|
case 3:
|
||
|
$rawkeyid = $this->read_bytes(8);
|
||
|
$this->keyid = '';
|
||
|
for($i = 0; $i < strlen($rawkeyid); $i++) { // Store KeyID in Hex
|
||
|
$this->keyid .= sprintf('%02X',ord($rawkeyid{$i}));
|
||
|
}
|
||
|
|
||
|
$this->key_algorithm = ord($this->read_byte());
|
||
|
|
||
|
$this->encrypted_data = $this->input;
|
||
|
break;
|
||
|
default:
|
||
|
throw new Exception("Unsupported AsymmetricSessionKeyPacket version: " . $this->version);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$bytes = chr($this->version);
|
||
|
|
||
|
for($i = 0; $i < strlen($this->keyid); $i += 2) {
|
||
|
$bytes .= chr(hexdec($this->keyid{$i}.$this->keyid{$i+1}));
|
||
|
}
|
||
|
|
||
|
$bytes .= chr($this->key_algorithm);
|
||
|
$bytes .= $this->encrypted_data;
|
||
|
return $bytes;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Signature packet (tag 2).
|
||
|
* Be sure to NULL the trailer if you update a signature packet!
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.2
|
||
|
*/
|
||
|
class OpenPGP_SignaturePacket extends OpenPGP_Packet {
|
||
|
public $version, $signature_type, $hash_algorithm, $key_algorithm, $hashed_subpackets, $unhashed_subpackets, $hash_head;
|
||
|
public $trailer; // This is the literal bytes that get tacked on the end of the message when verifying the signature
|
||
|
|
||
|
function __construct($data=NULL, $key_algorithm=NULL, $hash_algorithm=NULL) {
|
||
|
parent::__construct();
|
||
|
$this->version = 4; // Default to version 4 sigs
|
||
|
if(is_string($this->hash_algorithm = $hash_algorithm)) {
|
||
|
$this->hash_algorithm = array_search($this->hash_algorithm, self::$hash_algorithms);
|
||
|
}
|
||
|
if(is_string($this->key_algorithm = $key_algorithm)) {
|
||
|
$this->key_algorithm = array_search($this->key_algorithm, OpenPGP_PublicKeyPacket::$algorithms);
|
||
|
}
|
||
|
if($data) { // If we have any data, set up the creation time
|
||
|
$this->hashed_subpackets = array(new OpenPGP_SignaturePacket_SignatureCreationTimePacket(time()));
|
||
|
}
|
||
|
if($data instanceof OpenPGP_LiteralDataPacket) {
|
||
|
$this->signature_type = ($data->format == 'b') ? 0x00 : 0x01;
|
||
|
$data->normalize();
|
||
|
$data = $data->data;
|
||
|
} else if($data instanceof OpenPGP_Message && $data[0] instanceof OpenPGP_PublicKeyPacket) {
|
||
|
// $data is a message with PublicKey first, UserID second
|
||
|
$key = implode('', $data[0]->fingerprint_material());
|
||
|
$user_id = $data[1]->body();
|
||
|
$data = $key . chr(0xB4) . pack('N', strlen($user_id)) . $user_id;
|
||
|
}
|
||
|
$this->data = $data; // Store to-be-signed data in here until the signing happens
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* $this->data must be set to the data to sign (done by constructor)
|
||
|
* $signers in the same format as $verifiers for OpenPGP_Message.
|
||
|
*/
|
||
|
function sign_data($signers) {
|
||
|
$this->trailer = $this->calculate_trailer();
|
||
|
$signer = $signers[$this->key_algorithm_name()][$this->hash_algorithm_name()];
|
||
|
$this->data = call_user_func($signer, $this->data.$this->trailer);
|
||
|
$unpacked = unpack('n', substr(implode('',$this->data), 0, 2));
|
||
|
$this->hash_head = reset($unpacked);
|
||
|
}
|
||
|
|
||
|
function read() {
|
||
|
switch($this->version = ord($this->read_byte())) {
|
||
|
case 2:
|
||
|
case 3:
|
||
|
assert(ord($this->read_byte()) == 5);
|
||
|
$this->signature_type = ord($this->read_byte());
|
||
|
$creation_time = $this->read_timestamp();
|
||
|
$keyid = $this->read_bytes(8);
|
||
|
$keyidHex = '';
|
||
|
for($i = 0; $i < strlen($keyid); $i++) { // Store KeyID in Hex
|
||
|
$keyidHex .= sprintf('%02X',ord($keyid{$i}));
|
||
|
}
|
||
|
|
||
|
$this->hashed_subpackets = array();
|
||
|
$this->unhashed_subpackets = array(
|
||
|
new OpenPGP_SignaturePacket_SignatureCreationTimePacket($creation_time),
|
||
|
new OpenPGP_SignaturePacket_IssuerPacket($keyidHex)
|
||
|
);
|
||
|
|
||
|
$this->key_algorithm = ord($this->read_byte());
|
||
|
$this->hash_algorithm = ord($this->read_byte());
|
||
|
$this->hash_head = $this->read_unpacked(2, 'n');
|
||
|
$this->data = array();
|
||
|
while(strlen($this->input) > 0) {
|
||
|
$this->data[] = $this->read_mpi();
|
||
|
}
|
||
|
break;
|
||
|
case 4:
|
||
|
$this->signature_type = ord($this->read_byte());
|
||
|
$this->key_algorithm = ord($this->read_byte());
|
||
|
$this->hash_algorithm = ord($this->read_byte());
|
||
|
$this->trailer = chr(4).chr($this->signature_type).chr($this->key_algorithm).chr($this->hash_algorithm);
|
||
|
|
||
|
$hashed_size = $this->read_unpacked(2, 'n');
|
||
|
$hashed_subpackets = $this->read_bytes($hashed_size);
|
||
|
$this->trailer .= pack('n', $hashed_size).$hashed_subpackets;
|
||
|
$this->hashed_subpackets = self::get_subpackets($hashed_subpackets);
|
||
|
|
||
|
$this->trailer .= chr(4).chr(0xff).pack('N', 6 + $hashed_size);
|
||
|
|
||
|
$unhashed_size = $this->read_unpacked(2, 'n');
|
||
|
$this->unhashed_subpackets = self::get_subpackets($this->read_bytes($unhashed_size));
|
||
|
|
||
|
$this->hash_head = $this->read_unpacked(2, 'n');
|
||
|
|
||
|
$this->data = array();
|
||
|
while(strlen($this->input) > 0) {
|
||
|
$this->data[] = $this->read_mpi();
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function calculate_trailer() {
|
||
|
// The trailer is just the top of the body plus some crap
|
||
|
$body = $this->body_start();
|
||
|
return $body.chr(4).chr(0xff).pack('N', strlen($body));
|
||
|
}
|
||
|
|
||
|
function body_start() {
|
||
|
$body = chr(4).chr($this->signature_type).chr($this->key_algorithm).chr($this->hash_algorithm);
|
||
|
|
||
|
$hashed_subpackets = '';
|
||
|
foreach((array)$this->hashed_subpackets as $p) {
|
||
|
$hashed_subpackets .= $p->to_bytes();
|
||
|
}
|
||
|
$body .= pack('n', strlen($hashed_subpackets)).$hashed_subpackets;
|
||
|
|
||
|
return $body;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
switch($this->version) {
|
||
|
case 2:
|
||
|
case 3:
|
||
|
$body = chr($this->version) . chr(5) . chr($this->signature_type);
|
||
|
|
||
|
foreach((array)$this->unhashed_subpackets as $p) {
|
||
|
if($p instanceof OpenPGP_SignaturePacket_SignatureCreationTimePacket) {
|
||
|
$body .= pack('N', $p->data);
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
foreach((array)$this->unhashed_subpackets as $p) {
|
||
|
if($p instanceof OpenPGP_SignaturePacket_IssuerPacket) {
|
||
|
for($i = 0; $i < strlen($p->data); $i += 2) {
|
||
|
$body .= chr(hexdec($p->data{$i}.$p->data{$i+1}));
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
$body .= chr($this->key_algorithm);
|
||
|
$body .= chr($this->hash_algorithm);
|
||
|
$body .= pack('n', $this->hash_head);
|
||
|
|
||
|
foreach($this->data as $mpi) {
|
||
|
$body .= pack('n', OpenPGP::bitlength($mpi)).$mpi;
|
||
|
}
|
||
|
|
||
|
return $body;
|
||
|
case 4:
|
||
|
if(!$this->trailer) $this->trailer = $this->calculate_trailer();
|
||
|
$body = substr($this->trailer, 0, -6);
|
||
|
|
||
|
$unhashed_subpackets = '';
|
||
|
foreach((array)$this->unhashed_subpackets as $p) {
|
||
|
$unhashed_subpackets .= $p->to_bytes();
|
||
|
}
|
||
|
$body .= pack('n', strlen($unhashed_subpackets)).$unhashed_subpackets;
|
||
|
|
||
|
$body .= pack('n', $this->hash_head);
|
||
|
|
||
|
foreach((array)$this->data as $mpi) {
|
||
|
$body .= pack('n', OpenPGP::bitlength($mpi)).$mpi;
|
||
|
}
|
||
|
|
||
|
return $body;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function key_algorithm_name() {
|
||
|
return OpenPGP_PublicKeyPacket::$algorithms[$this->key_algorithm];
|
||
|
}
|
||
|
|
||
|
function hash_algorithm_name() {
|
||
|
return self::$hash_algorithms[$this->hash_algorithm];
|
||
|
}
|
||
|
|
||
|
function issuer() {
|
||
|
foreach($this->hashed_subpackets as $p) {
|
||
|
if($p instanceof OpenPGP_SignaturePacket_IssuerPacket) return $p->data;
|
||
|
}
|
||
|
foreach($this->unhashed_subpackets as $p) {
|
||
|
if($p instanceof OpenPGP_SignaturePacket_IssuerPacket) return $p->data;
|
||
|
}
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.2.3.1
|
||
|
*/
|
||
|
static function get_subpackets($input) {
|
||
|
$subpackets = array();
|
||
|
while(($length = strlen($input)) > 0) {
|
||
|
$subpackets[] = self::get_subpacket($input);
|
||
|
if($length == strlen($input)) { // Parsing stuck?
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
return $subpackets;
|
||
|
}
|
||
|
|
||
|
static function get_subpacket(&$input) {
|
||
|
$len = ord($input[0]);
|
||
|
$length_of_length = 1;
|
||
|
// if($len < 192) One octet length, no furthur processing
|
||
|
if($len > 190 && $len < 255) { // Two octet length
|
||
|
$length_of_length = 2;
|
||
|
$len = (($len - 192) << 8) + ord($input[1]) + 192;
|
||
|
}
|
||
|
if($len == 255) { // Five octet length
|
||
|
$length_of_length = 5;
|
||
|
$unpacked = unpack('N', substr($input, 1, 4));
|
||
|
$len = reset($unpacked);
|
||
|
}
|
||
|
$input = substr($input, $length_of_length); // Chop off length header
|
||
|
$tag = ord($input[0]);
|
||
|
$class = self::class_for($tag);
|
||
|
if($class) {
|
||
|
$packet = new $class();
|
||
|
$packet->tag = $tag;
|
||
|
$packet->input = substr($input, 1, $len-1);
|
||
|
$packet->length = $len-1;
|
||
|
$packet->read();
|
||
|
unset($packet->input);
|
||
|
unset($packet->length);
|
||
|
}
|
||
|
$input = substr($input, $len); // Chop off the data from this packet
|
||
|
return $packet;
|
||
|
}
|
||
|
|
||
|
static $hash_algorithms = array(
|
||
|
1 => 'MD5',
|
||
|
2 => 'SHA1',
|
||
|
3 => 'RIPEMD160',
|
||
|
8 => 'SHA256',
|
||
|
9 => 'SHA384',
|
||
|
10 => 'SHA512',
|
||
|
11 => 'SHA224'
|
||
|
);
|
||
|
|
||
|
static $subpacket_types = array(
|
||
|
//0 => 'Reserved',
|
||
|
//1 => 'Reserved',
|
||
|
2 => 'SignatureCreationTime',
|
||
|
3 => 'SignatureExpirationTime',
|
||
|
4 => 'ExportableCertification',
|
||
|
5 => 'TrustSignature',
|
||
|
6 => 'RegularExpression',
|
||
|
7 => 'Revocable',
|
||
|
//8 => 'Reserved',
|
||
|
9 => 'KeyExpirationTime',
|
||
|
//10 => 'Placeholder for backward compatibility',
|
||
|
11 => 'PreferredSymmetricAlgorithms',
|
||
|
12 => 'RevocationKey',
|
||
|
//13 => 'Reserved',
|
||
|
//14 => 'Reserved',
|
||
|
//15 => 'Reserved',
|
||
|
16 => 'Issuer',
|
||
|
//17 => 'Reserved',
|
||
|
//18 => 'Reserved',
|
||
|
//19 => 'Reserved',
|
||
|
20 => 'NotationData',
|
||
|
21 => 'PreferredHashAlgorithms',
|
||
|
22 => 'PreferredCompressionAlgorithms',
|
||
|
23 => 'KeyServerPreferences',
|
||
|
24 => 'PreferredKeyServer',
|
||
|
25 => 'PrimaryUserID',
|
||
|
26 => 'PolicyURI',
|
||
|
27 => 'KeyFlags',
|
||
|
28 => 'SignersUserID',
|
||
|
29 => 'ReasonforRevocation',
|
||
|
30 => 'Features',
|
||
|
31 => 'SignatureTarget',
|
||
|
32 => 'EmbeddedSignature',
|
||
|
);
|
||
|
|
||
|
static function class_for($tag) {
|
||
|
if(!isset(self::$subpacket_types[$tag])) return 'OpenPGP_SignaturePacket_Subpacket';
|
||
|
return 'OpenPGP_SignaturePacket_'.self::$subpacket_types[$tag].'Packet';
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_Subpacket extends OpenPGP_Packet {
|
||
|
function __construct($data=NULL) {
|
||
|
parent::__construct($data);
|
||
|
$this->tag = array_search(substr(substr(get_class($this), 8+16), 0, -6), OpenPGP_SignaturePacket::$subpacket_types);
|
||
|
}
|
||
|
|
||
|
function header_and_body() {
|
||
|
$body = $this->body(); // Get body first, we will need it's length
|
||
|
$size = chr(255).pack('N', strlen($body)+1); // Use 5-octet lengths + 1 for tag as first packet body octet
|
||
|
$tag = chr($this->tag);
|
||
|
return array('header' => $size.$tag, 'body' => $body);
|
||
|
}
|
||
|
|
||
|
/* Defaults for unsupported packets */
|
||
|
function read() {
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.2.3.4
|
||
|
*/
|
||
|
class OpenPGP_SignaturePacket_SignatureCreationTimePacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = $this->read_timestamp();
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return pack('N', $this->data);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_SignatureExpirationTimePacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = $this->read_timestamp();
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return pack('N', $this->data);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_ExportableCertificationPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = (ord($this->input) != 0);
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return chr($this->data ? 1 : 0);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_TrustSignaturePacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->depth = ord($this->input{0});
|
||
|
$this->trust = ord($this->input{1});
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return chr($this->depth) . chr($this->trust);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_RegularExpressionPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = substr($this->input, 0, -1);
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data . chr(0);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_RevocablePacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = (ord($this->input) != 0);
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return chr($this->data ? 1 : 0);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_KeyExpirationTimePacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = $this->read_timestamp();
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return pack('N', $this->data);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_PreferredSymmetricAlgorithmsPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = array();
|
||
|
while(strlen($this->input) > 0) {
|
||
|
$this->data[] = ord($this->read_byte());
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$bytes = '';
|
||
|
foreach($this->data as $algo) {
|
||
|
$bytes .= chr($algo);
|
||
|
}
|
||
|
return $bytes;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_RevocationKeyPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
public $key_algorithm, $fingerprint, $sensitive;
|
||
|
|
||
|
function read() {
|
||
|
// bitfield must have bit 0x80 set, says the spec
|
||
|
$bitfield = ord($this->read_byte());
|
||
|
$this->sensitive = $bitfield & 0x40 == 0x40;
|
||
|
$this->key_algorithm = ord($this->read_byte());
|
||
|
|
||
|
$this->fingerprint = '';
|
||
|
while(strlen($this->input) > 0) {
|
||
|
$this->fingerprint .= sprintf('%02X',ord($this->read_byte()));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$bytes = '';
|
||
|
$bytes .= chr(0x80 | ($this->sensitive ? 0x40 : 0x00));
|
||
|
$bytes .= chr($this->key_algorithm);
|
||
|
|
||
|
for($i = 0; $i < strlen($this->fingerprint); $i += 2) {
|
||
|
$bytes .= chr(hexdec($this->fingerprint{$i}.$this->fingerprint{$i+1}));
|
||
|
}
|
||
|
|
||
|
return $bytes;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.2.3.5
|
||
|
*/
|
||
|
class OpenPGP_SignaturePacket_IssuerPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
for($i = 0; $i < 8; $i++) { // Store KeyID in Hex
|
||
|
$this->data .= sprintf('%02X',ord($this->read_byte()));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$bytes = '';
|
||
|
for($i = 0; $i < strlen($this->data); $i += 2) {
|
||
|
$bytes .= chr(hexdec($this->data{$i}.$this->data{$i+1}));
|
||
|
}
|
||
|
return $bytes;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_NotationDataPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
public $human_readable, $name;
|
||
|
|
||
|
function read() {
|
||
|
$flags = $this->read_bytes(4);
|
||
|
$namelen = $this->read_unpacked(2, 'n');
|
||
|
$datalen = $this->read_unpacked(2, 'n');
|
||
|
$this->human_readable = ord($flags[0]) & 0x80 == 0x80;
|
||
|
$this->name = $this->read_bytes($namelen);
|
||
|
$this->data = $this->read_bytes($datalen);
|
||
|
}
|
||
|
|
||
|
function body () {
|
||
|
return chr($this->human_readable ? 0x80 : 0x00) . "\0\0\0" .
|
||
|
pack('n', strlen($this->name)) . pack('n', strlen($this->data)) .
|
||
|
$this->name . $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_PreferredHashAlgorithmsPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = array();
|
||
|
while(strlen($this->input) > 0) {
|
||
|
$this->data[] = ord($this->read_byte());
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$bytes = '';
|
||
|
foreach($this->data as $algo) {
|
||
|
$bytes .= chr($algo);
|
||
|
}
|
||
|
return $bytes;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_PreferredCompressionAlgorithmsPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = array();
|
||
|
while(strlen($this->input) > 0) {
|
||
|
$this->data[] = ord($this->read_byte());
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$bytes = '';
|
||
|
foreach($this->data as $algo) {
|
||
|
$bytes .= chr($algo);
|
||
|
}
|
||
|
return $bytes;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_KeyServerPreferencesPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
public $no_modify;
|
||
|
|
||
|
function read() {
|
||
|
$flags = ord($this->input);
|
||
|
$this->no_modify = $flags & 0x80 == 0x80;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return chr($this->no_modify ? 0x80 : 0x00);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_PreferredKeyServerPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_PrimaryUserIDPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = (ord($this->input) != 0);
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return chr($this->data ? 1 : 0);
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_PolicyURIPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_KeyFlagsPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function __construct($flags=array()) {
|
||
|
parent::__construct();
|
||
|
$this->flags = $flags;
|
||
|
}
|
||
|
|
||
|
function read() {
|
||
|
$this->flags = array();
|
||
|
while($this->input) {
|
||
|
$this->flags[] = ord($this->read_byte());
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$bytes = '';
|
||
|
foreach($this->flags as $f) {
|
||
|
$bytes .= chr($f);
|
||
|
}
|
||
|
return $bytes;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_SignersUserIDPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
function read() {
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_ReasonforRevocationPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
public $code;
|
||
|
|
||
|
function read() {
|
||
|
$this->code = ord($this->read_byte());
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return chr($this->code) . $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
class OpenPGP_SignaturePacket_FeaturesPacket extends OpenPGP_SignaturePacket_KeyFlagsPacket {
|
||
|
// Identical functionality to parent
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_SignatureTargetPacket extends OpenPGP_SignaturePacket_Subpacket {
|
||
|
public $key_algorithm, $hash_algorithm;
|
||
|
|
||
|
function read() {
|
||
|
$this->key_algorithm = ord($this->read_byte());
|
||
|
$this->hash_algorithm = ord($this->read_byte());
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return chr($this->key_algorithm) . chr($this->hash_algorithm) . $this->data;
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
class OpenPGP_SignaturePacket_EmbeddedSignaturePacket extends OpenPGP_SignaturePacket {
|
||
|
// TODO: This is duplicated from subpacket... improve?
|
||
|
function __construct($data=NULL) {
|
||
|
parent::__construct($data);
|
||
|
$this->tag = array_search(substr(substr(get_class($this), 8+16), 0, -6), OpenPGP_SignaturePacket::$subpacket_types);
|
||
|
}
|
||
|
|
||
|
function header_and_body() {
|
||
|
$body = $this->body(); // Get body first, we will need it's length
|
||
|
$size = chr(255).pack('N', strlen($body)+1); // Use 5-octet lengths + 1 for tag as first packet body octet
|
||
|
$tag = chr($this->tag);
|
||
|
return array('header' => $size.$tag, 'body' => $body);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Symmetric-Key Encrypted Session Key packet (tag 3).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.3
|
||
|
*/
|
||
|
class OpenPGP_SymmetricSessionKeyPacket extends OpenPGP_Packet {
|
||
|
public $version, $symmetric_algorithm, $s2k, $encrypted_data;
|
||
|
|
||
|
function __construct($s2k=NULL, $encrypted_data='', $symmetric_algorithm=9, $version=3) {
|
||
|
parent::__construct();
|
||
|
$this->version = $version;
|
||
|
$this->symmetric_algorithm = $symmetric_algorithm;
|
||
|
$this->s2k = $s2k;
|
||
|
$this->encrypted_data = $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;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP One-Pass Signature packet (tag 4).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.4
|
||
|
*/
|
||
|
class OpenPGP_OnePassSignaturePacket extends OpenPGP_Packet {
|
||
|
public $version, $signature_type, $hash_algorithm, $key_algorithm, $key_id, $nested;
|
||
|
function read() {
|
||
|
$this->version = ord($this->read_byte());
|
||
|
$this->signature_type = ord($this->read_byte());
|
||
|
$this->hash_algorithm = ord($this->read_byte());
|
||
|
$this->key_algorithm = ord($this->read_byte());
|
||
|
for($i = 0; $i < 8; $i++) { // Store KeyID in Hex
|
||
|
$this->key_id .= sprintf('%02X',ord($this->read_byte()));
|
||
|
}
|
||
|
$this->nested = ord($this->read_byte());
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$body = chr($this->version).chr($this->signature_type).chr($this->hash_algorithm).chr($this->key_algorithm);
|
||
|
for($i = 0; $i < strlen($this->key_id); $i += 2) {
|
||
|
$body .= chr(hexdec($this->key_id{$i}.$this->key_id{$i+1}));
|
||
|
}
|
||
|
$body .= chr((int)$this->nested);
|
||
|
return $body;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Public-Key packet (tag 6).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.1.1
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.2
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-11.1
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-12
|
||
|
*/
|
||
|
class OpenPGP_PublicKeyPacket extends OpenPGP_Packet {
|
||
|
public $version, $timestamp, $algorithm;
|
||
|
public $key, $key_id, $fingerprint;
|
||
|
public $v3_days_of_validity;
|
||
|
|
||
|
function __construct($key=array(), $algorithm='RSA', $timestamp=NULL, $version=4) {
|
||
|
parent::__construct();
|
||
|
$this->key = $key;
|
||
|
if(is_string($this->algorithm = $algorithm)) {
|
||
|
$this->algorithm = array_search($this->algorithm, self::$algorithms);
|
||
|
}
|
||
|
$this->timestamp = $timestamp ? $timestamp : time();
|
||
|
$this->version = $version;
|
||
|
|
||
|
if(count($this->key) > 0) {
|
||
|
$this->key_id = substr($this->fingerprint(), -8);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// Find self signatures in a message, these often contain metadata about the key
|
||
|
function self_signatures($message) {
|
||
|
$sigs = array();
|
||
|
$keyid16 = strtoupper(substr($this->fingerprint, -16));
|
||
|
foreach($message as $p) {
|
||
|
if($p instanceof OpenPGP_SignaturePacket) {
|
||
|
if(strtoupper($p->issuer()) == $keyid16) {
|
||
|
$sigs[] = $p;
|
||
|
} else {
|
||
|
foreach(array_merge($p->hashed_subpackets, $p->unhashed_subpackets) as $s) {
|
||
|
if($s instanceof OpenPGP_SignaturePacket_EmbeddedSignaturePacket && strtoupper($s->issuer()) == $keyid16) {
|
||
|
$sigs[] = $p;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
} else if(count($sigs)) break; // After we've seen a self sig, the next non-sig stop all self-sigs
|
||
|
}
|
||
|
return $sigs;
|
||
|
}
|
||
|
|
||
|
// Find expiry time of this key based on the self signatures in a message
|
||
|
function expires($message) {
|
||
|
foreach($this->self_signatures($message) as $p) {
|
||
|
foreach(array_merge($p->hashed_subpackets, $p->unhashed_subpackets) as $s) {
|
||
|
if($s instanceof OpenPGP_SignaturePacket_KeyExpirationTimePacket) {
|
||
|
return $this->timestamp + $s->data;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return NULL; // Never expires
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.2
|
||
|
*/
|
||
|
function read() {
|
||
|
switch ($this->version = ord($this->read_byte())) {
|
||
|
case 3:
|
||
|
$this->timestamp = $this->read_timestamp();
|
||
|
$this->v3_days_of_validity = $this->read_unpacked(2, 'n');
|
||
|
$this->algorithm = ord($this->read_byte());
|
||
|
$this->read_key_material();
|
||
|
break;
|
||
|
case 4:
|
||
|
$this->timestamp = $this->read_timestamp();
|
||
|
$this->algorithm = ord($this->read_byte());
|
||
|
$this->read_key_material();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.2
|
||
|
*/
|
||
|
function read_key_material() {
|
||
|
foreach (self::$key_fields[$this->algorithm] as $field) {
|
||
|
$this->key[$field] = $this->read_mpi();
|
||
|
}
|
||
|
$this->key_id = substr($this->fingerprint(), -8);
|
||
|
}
|
||
|
|
||
|
function fingerprint_material() {
|
||
|
switch ($this->version) {
|
||
|
case 3:
|
||
|
$material = array();
|
||
|
foreach (self::$key_fields[$this->algorithm] as $i) {
|
||
|
$material[] = pack('n', OpenPGP::bitlength($this->key[$i]));
|
||
|
$material[] = $this->key[$i];
|
||
|
}
|
||
|
return $material;
|
||
|
case 4:
|
||
|
$head = array(
|
||
|
chr(0x99), NULL,
|
||
|
chr($this->version), pack('N', $this->timestamp),
|
||
|
chr($this->algorithm),
|
||
|
);
|
||
|
$material = array();
|
||
|
foreach (self::$key_fields[$this->algorithm] as $i) {
|
||
|
$material[] = pack('n', OpenPGP::bitlength($this->key[$i]));
|
||
|
$material[] = $this->key[$i];
|
||
|
}
|
||
|
$material = implode('', $material);
|
||
|
$head[1] = pack('n', 6 + strlen($material));
|
||
|
$head[] = $material;
|
||
|
return $head;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-12.2
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-3.3
|
||
|
*/
|
||
|
function fingerprint() {
|
||
|
switch ($this->version) {
|
||
|
case 2:
|
||
|
case 3:
|
||
|
return $this->fingerprint = strtoupper(md5(implode('', $this->fingerprint_material())));
|
||
|
case 4:
|
||
|
return $this->fingerprint = strtoupper(sha1(implode('', $this->fingerprint_material())));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
switch ($this->version) {
|
||
|
case 2:
|
||
|
case 3:
|
||
|
return implode('', array_merge(array(
|
||
|
chr($this->version) . pack('N', $this->timestamp) .
|
||
|
pack('n', $this->v3_days_of_validity) . chr($this->algorithm)
|
||
|
), $this->fingerprint_material())
|
||
|
);
|
||
|
case 4:
|
||
|
return implode('', array_slice($this->fingerprint_material(), 2));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static $key_fields = array(
|
||
|
1 => array('n', 'e'), // RSA
|
||
|
16 => array('p', 'g', 'y'), // ELG-E
|
||
|
17 => array('p', 'q', 'g', 'y'), // DSA
|
||
|
);
|
||
|
|
||
|
static $algorithms = array(
|
||
|
1 => 'RSA',
|
||
|
2 => 'RSA',
|
||
|
3 => 'RSA',
|
||
|
16 => 'ELGAMAL',
|
||
|
17 => 'DSA',
|
||
|
18 => 'ECC',
|
||
|
19 => 'ECDSA',
|
||
|
21 => 'DH'
|
||
|
);
|
||
|
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Public-Subkey packet (tag 14).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.1.2
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.2
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-11.1
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-12
|
||
|
*/
|
||
|
class OpenPGP_PublicSubkeyPacket extends OpenPGP_PublicKeyPacket {
|
||
|
// TODO
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Secret-Key packet (tag 5).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.1.3
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.3
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-11.2
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-12
|
||
|
*/
|
||
|
class OpenPGP_SecretKeyPacket extends OpenPGP_PublicKeyPacket {
|
||
|
public $s2k_useage, $s2k, $symmetric_algorithm, $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) {
|
||
|
$this->symmetric_algorithm = ord($this->read_byte());
|
||
|
$this->s2k = OpenPGP_S2k::parse($this->input);
|
||
|
} else if($this->s2k_useage > 0) {
|
||
|
$this->symmetric_algorithm = $this->s2k_useage;
|
||
|
}
|
||
|
if($this->s2k_useage > 0) {
|
||
|
$this->encrypted_data = $this->input; // Rest of input is MPIs and checksum (encrypted)
|
||
|
} else {
|
||
|
$this->key_from_input();
|
||
|
$this->private_hash = $this->read_bytes(2); // TODO: Validate checksum?
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static $secret_key_fields = array(
|
||
|
1 => array('d', 'p', 'q', 'u'), // RSA
|
||
|
2 => array('d', 'p', 'q', 'u'), // RSA-E
|
||
|
3 => array('d', 'p', 'q', 'u'), // RSA-S
|
||
|
16 => array('x'), // ELG-E
|
||
|
17 => array('x'), // DSA
|
||
|
);
|
||
|
|
||
|
function key_from_input() {
|
||
|
foreach(self::$secret_key_fields[$this->algorithm] as $field) {
|
||
|
$this->key[$field] = $this->read_mpi();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$bytes = parent::body() . chr($this->s2k_useage);
|
||
|
$secret_material = NULL;
|
||
|
if($this->s2k_useage == 255 || $this->s2k_useage == 254) {
|
||
|
$bytes .= chr($this->symmetric_algorithm);
|
||
|
$bytes .= $this->s2k->to_bytes();
|
||
|
}
|
||
|
if($this->s2k_useage > 0) {
|
||
|
$bytes .= $this->encrypted_data;
|
||
|
} else {
|
||
|
$secret_material = '';
|
||
|
foreach(self::$secret_key_fields[$this->algorithm] as $f) {
|
||
|
$f = $this->key[$f];
|
||
|
$secret_material .= pack('n', OpenPGP::bitlength($f));
|
||
|
$secret_material .= $f;
|
||
|
}
|
||
|
$bytes .= $secret_material;
|
||
|
|
||
|
// 2-octet checksum
|
||
|
$chk = 0;
|
||
|
for($i = 0; $i < strlen($secret_material); $i++) {
|
||
|
$chk = ($chk + ord($secret_material[$i])) % 65536;
|
||
|
}
|
||
|
$bytes .= pack('n', $chk);
|
||
|
}
|
||
|
return $bytes;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Secret-Subkey packet (tag 7).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.1.4
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.5.3
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-11.2
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-12
|
||
|
*/
|
||
|
class OpenPGP_SecretSubkeyPacket extends OpenPGP_SecretKeyPacket {
|
||
|
// TODO
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Compressed Data packet (tag 8).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.6
|
||
|
*/
|
||
|
class OpenPGP_CompressedDataPacket extends OpenPGP_Packet implements IteratorAggregate, ArrayAccess {
|
||
|
public $algorithm;
|
||
|
/* see http://tools.ietf.org/html/rfc4880#section-9.3 */
|
||
|
static $algorithms = array(0 => 'Uncompressed', 1 => 'ZIP', 2 => 'ZLIB', 3 => 'BZip2');
|
||
|
function read() {
|
||
|
$this->algorithm = ord($this->read_byte());
|
||
|
$this->data = $this->read_bytes($this->length);
|
||
|
switch($this->algorithm) {
|
||
|
case 0:
|
||
|
$this->data = OpenPGP_Message::parse($this->data);
|
||
|
break;
|
||
|
case 1:
|
||
|
$this->data = OpenPGP_Message::parse(gzinflate($this->data));
|
||
|
break;
|
||
|
case 2:
|
||
|
$this->data = OpenPGP_Message::parse(gzuncompress($this->data));
|
||
|
break;
|
||
|
case 3:
|
||
|
$this->data = OpenPGP_Message::parse(bzdecompress($this->data));
|
||
|
break;
|
||
|
default:
|
||
|
/* TODO error? */
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
$body = chr($this->algorithm);
|
||
|
switch($this->algorithm) {
|
||
|
case 0:
|
||
|
$body .= $this->data->to_bytes();
|
||
|
break;
|
||
|
case 1:
|
||
|
$body .= gzdeflate($this->data->to_bytes());
|
||
|
break;
|
||
|
case 2:
|
||
|
$body .= gzcompress($this->data->to_bytes());
|
||
|
break;
|
||
|
case 3:
|
||
|
$body .= bzcompress($this->data->to_bytes());
|
||
|
break;
|
||
|
default:
|
||
|
/* TODO error? */
|
||
|
}
|
||
|
return $body;
|
||
|
}
|
||
|
|
||
|
// IteratorAggregate interface
|
||
|
|
||
|
function getIterator() {
|
||
|
return new ArrayIterator($this->data->packets);
|
||
|
}
|
||
|
|
||
|
// ArrayAccess interface
|
||
|
|
||
|
function offsetExists($offset) {
|
||
|
return isset($this->data[$offset]);
|
||
|
}
|
||
|
|
||
|
function offsetGet($offset) {
|
||
|
return $this->data[$offset];
|
||
|
}
|
||
|
|
||
|
function offsetSet($offset, $value) {
|
||
|
return is_null($offset) ? $this->data[] = $value : $this->data[$offset] = $value;
|
||
|
}
|
||
|
|
||
|
function offsetUnset($offset) {
|
||
|
unset($this->data[$offset]);
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Symmetrically Encrypted Data packet (tag 9).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.7
|
||
|
*/
|
||
|
class OpenPGP_EncryptedDataPacket extends OpenPGP_Packet {
|
||
|
function read() {
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Marker packet (tag 10).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.8
|
||
|
*/
|
||
|
class OpenPGP_MarkerPacket extends OpenPGP_Packet {
|
||
|
// TODO
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Literal Data packet (tag 11).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.9
|
||
|
*/
|
||
|
class OpenPGP_LiteralDataPacket extends OpenPGP_Packet {
|
||
|
public $format, $filename, $timestamp;
|
||
|
|
||
|
function __construct($data=NULL, $opt=array()) {
|
||
|
parent::__construct();
|
||
|
$this->data = $data;
|
||
|
$this->format = isset($opt['format']) ? $opt['format'] : 'b';
|
||
|
$this->filename = isset($opt['filename']) ? $opt['filename'] : 'data';
|
||
|
$this->timestamp = isset($opt['timestamp']) ? $opt['timestamp'] : time();
|
||
|
}
|
||
|
|
||
|
function normalize() {
|
||
|
if($this->format == 'u' || $this->format == 't') { // Normalize line endings
|
||
|
$this->data = str_replace("\n", "\r\n", str_replace("\r", "\n", str_replace("\r\n", "\n", $this->data)));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function read() {
|
||
|
$this->size = $this->length - 1 - 4;
|
||
|
$this->format = $this->read_byte();
|
||
|
$filename_length = ord($this->read_byte());
|
||
|
$this->size -= $filename_length;
|
||
|
$this->filename = $this->read_bytes($filename_length);
|
||
|
$this->timestamp = $this->read_timestamp();
|
||
|
$this->data = $this->read_bytes($this->size);
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->format.chr(strlen($this->filename)).$this->filename.pack('N', $this->timestamp).$this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Trust packet (tag 12).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.10
|
||
|
*/
|
||
|
class OpenPGP_TrustPacket extends OpenPGP_Packet {
|
||
|
function read() {
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP User ID packet (tag 13).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.11
|
||
|
* @see http://tools.ietf.org/html/rfc2822
|
||
|
*/
|
||
|
class OpenPGP_UserIDPacket extends OpenPGP_Packet {
|
||
|
public $name, $comment, $email;
|
||
|
|
||
|
function __construct($name='', $comment='', $email='') {
|
||
|
parent::__construct();
|
||
|
if(!$comment && !$email) {
|
||
|
$this->input = $name;
|
||
|
$this->read();
|
||
|
} else {
|
||
|
$this->name = $name;
|
||
|
$this->comment = $comment;
|
||
|
$this->email = $email;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function read() {
|
||
|
$this->data = $this->input;
|
||
|
// User IDs of the form: "name (comment) <email>"
|
||
|
if (preg_match('/^([^\(]+)\(([^\)]+)\)\s+<([^>]+)>$/', $this->data, $matches)) {
|
||
|
$this->name = trim($matches[1]);
|
||
|
$this->comment = trim($matches[2]);
|
||
|
$this->email = trim($matches[3]);
|
||
|
}
|
||
|
// User IDs of the form: "name <email>"
|
||
|
else if (preg_match('/^([^<]+)\s+<([^>]+)>$/', $this->data, $matches)) {
|
||
|
$this->name = trim($matches[1]);
|
||
|
$this->comment = NULL;
|
||
|
$this->email = trim($matches[2]);
|
||
|
}
|
||
|
// User IDs of the form: "name"
|
||
|
else if (preg_match('/^([^<]+)$/', $this->data, $matches)) {
|
||
|
$this->name = trim($matches[1]);
|
||
|
$this->comment = NULL;
|
||
|
$this->email = NULL;
|
||
|
}
|
||
|
// User IDs of the form: "<email>"
|
||
|
else if (preg_match('/^<([^>]+)>$/', $this->data, $matches)) {
|
||
|
$this->name = NULL;
|
||
|
$this->comment = NULL;
|
||
|
$this->email = trim($matches[2]);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
function __toString() {
|
||
|
$text = array();
|
||
|
if ($this->name) { $text[] = $this->name; }
|
||
|
if ($this->comment) { $text[] = "({$this->comment})"; }
|
||
|
if ($this->email) { $text[] = "<{$this->email}>"; }
|
||
|
return implode(' ', $text);
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return ''.$this; // Convert to string is the body
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP User Attribute packet (tag 17).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.12
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-11.1
|
||
|
*/
|
||
|
class OpenPGP_UserAttributePacket extends OpenPGP_Packet {
|
||
|
public $packets;
|
||
|
|
||
|
// TODO
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Sym. Encrypted Integrity Protected Data packet (tag 18).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.13
|
||
|
*/
|
||
|
class OpenPGP_IntegrityProtectedDataPacket extends OpenPGP_EncryptedDataPacket {
|
||
|
public $version;
|
||
|
|
||
|
function __construct($data='', $version=1) {
|
||
|
parent::__construct();
|
||
|
$this->version = $version;
|
||
|
$this->data = $data;
|
||
|
}
|
||
|
|
||
|
function read() {
|
||
|
$this->version = ord($this->read_byte());
|
||
|
$this->data = $this->input;
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return chr($this->version) . $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Modification Detection Code packet (tag 19).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-5.14
|
||
|
*/
|
||
|
class OpenPGP_ModificationDetectionCodePacket extends OpenPGP_Packet {
|
||
|
function __construct($sha1='') {
|
||
|
parent::__construct();
|
||
|
$this->data = $sha1;
|
||
|
}
|
||
|
|
||
|
function read() {
|
||
|
$this->data = $this->input;
|
||
|
if(strlen($this->input) != 20) throw new Exception("Bad ModificationDetectionCodePacket");
|
||
|
}
|
||
|
|
||
|
function header_and_body() {
|
||
|
$body = $this->body(); // Get body first, we will need it's length
|
||
|
if(strlen($body) != 20) throw new Exception("Bad ModificationDetectionCodePacket");
|
||
|
return array('header' => "\xD3\x14", 'body' => $body);
|
||
|
}
|
||
|
|
||
|
function body() {
|
||
|
return $this->data;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* OpenPGP Private or Experimental packet (tags 60..63).
|
||
|
*
|
||
|
* @see http://tools.ietf.org/html/rfc4880#section-4.3
|
||
|
*/
|
||
|
class OpenPGP_ExperimentalPacket extends OpenPGP_Packet {}
|