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- Upgrading phpseclib/phpseclib (2.0.4 => 2.0.34) - Upgrading singpolyma/openpgp-php (0.3.0 => 0.5.0)
1898 lines
55 KiB
PHP
1898 lines
55 KiB
PHP
<?php
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// This is free and unencumbered software released into the public domain.
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/**
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* OpenPGP.php is a pure-PHP implementation of the OpenPGP Message Format
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* (RFC 4880).
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*
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* @package OpenPGP
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* @version 0.5.0
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* @author Arto Bendiken <arto.bendiken@gmail.com>
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* @author Stephen Paul Weber <singpolyma@singpolyma.net>
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* @see http://github.com/bendiken/openpgp-php
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*/
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//////////////////////////////////////////////////////////////////////////////
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// OpenPGP utilities
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/**
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* @see http://tools.ietf.org/html/rfc4880
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*/
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class OpenPGP {
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const VERSION = array(0, 5, 0);
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/**
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* @see http://tools.ietf.org/html/rfc4880#section-6
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* @see http://tools.ietf.org/html/rfc4880#section-6.2
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* @see http://tools.ietf.org/html/rfc2045
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*/
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static function enarmor($data, $marker = 'MESSAGE', array $headers = array()) {
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$text = self::header($marker) . "\n";
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foreach ($headers as $key => $value) {
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$text .= $key . ': ' . (string)$value . "\n";
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}
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$text .= "\n" . wordwrap(base64_encode($data), 76, "\n", true);
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$text .= "\n".'=' . base64_encode(substr(pack('N', self::crc24($data)), 1)) . "\n";
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$text .= self::footer($marker) . "\n";
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return $text;
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}
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/**
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* @see http://tools.ietf.org/html/rfc4880#section-6
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* @see http://tools.ietf.org/html/rfc2045
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*/
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static function unarmor($text, $header = 'PGP PUBLIC KEY BLOCK') {
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$header = self::header($header);
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$text = str_replace(array("\r\n", "\r"), array("\n", ''), $text);
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if (($pos1 = strpos($text, $header)) !== FALSE &&
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($pos1 = strpos($text, "\n\n", $pos1 += strlen($header))) !== FALSE) {
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$pos2 = strpos($text, "\n=", $pos1 += 2);
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if ($pos2 === FALSE) {
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trigger_error("Invalid ASCII armor, missing CRC");
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$pos2 = strpos($text, "-----END");
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if ($pos2 === FALSE) return NULL;
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}
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return base64_decode($text = substr($text, $pos1, $pos2 - $pos1));
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}
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}
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/**
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* @see http://tools.ietf.org/html/rfc4880#section-6.2
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*/
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static function header($marker) {
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return '-----BEGIN ' . strtoupper((string)$marker) . '-----';
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}
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/**
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* @see http://tools.ietf.org/html/rfc4880#section-6.2
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*/
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static function footer($marker) {
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return '-----END ' . strtoupper((string)$marker) . '-----';
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}
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/**
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* @see http://tools.ietf.org/html/rfc4880#section-6
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* @see http://tools.ietf.org/html/rfc4880#section-6.1
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*/
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static function crc24($data) {
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$crc = 0x00b704ce;
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for ($i = 0; $i < strlen($data); $i++) {
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$crc ^= (ord($data[$i]) & 255) << 16;
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for ($j = 0; $j < 8; $j++) {
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$crc <<= 1;
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if ($crc & 0x01000000) {
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$crc ^= 0x01864cfb;
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}
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}
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}
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return $crc & 0x00ffffff;
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}
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/**
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* @see http://tools.ietf.org/html/rfc4880#section-12.2
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*/
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static function bitlength($data) {
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return (strlen($data) - 1) * 8 + (int)floor(log(ord($data[0]), 2)) + 1;
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}
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static function decode_s2k_count($c) {
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return ((int)16 + ($c & 15)) << (($c >> 4) + 6);
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}
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static function encode_s2k_count($iterations) {
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if($iterations >= 65011712) return 255;
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$count = $iterations >> 6;
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$c = 0;
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while($count >= 32) {
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$count = $count >> 1;
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$c++;
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}
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$result = ($c << 4) | ($count - 16);
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if(OpenPGP::decode_s2k_count($result) < $iterations) {
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return $result + 1;
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}
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return $result;
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}
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}
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class OpenPGP_S2K {
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public $type, $hash_algorithm, $salt, $count;
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function __construct($salt='BADSALT', $hash_algorithm=10, $count=65536, $type=3) {
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$this->type = $type;
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$this->hash_algorithm = $hash_algorithm;
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$this->salt = $salt;
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$this->count = $count;
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}
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static function parse(&$input) {
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$s2k = new OpenPGP_S2k();
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switch($s2k->type = ord($input[0])) {
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case 0:
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$s2k->hash_algorithm = ord($input[1]);
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$input = substr($input, 2);
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break;
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case 1:
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$s2k->hash_algorithm = ord($input[1]);
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$s2k->salt = substr($input, 2, 8);
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$input = substr($input, 10);
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break;
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case 3:
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$s2k->hash_algorithm = ord($input[1]);
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$s2k->salt = substr($input, 2, 8);
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$s2k->count = OpenPGP::decode_s2k_count(ord($input[10]));
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$input = substr($input, 11);
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break;
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}
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return $s2k;
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}
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function to_bytes() {
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$bytes = chr($this->type);
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switch($this->type) {
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case 0:
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$bytes .= chr($this->hash_algorithm);
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break;
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case 1:
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if(strlen($this->salt) != 8) throw new Exception("Invalid salt length");
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$bytes .= chr($this->hash_algorithm);
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$bytes .= $this->salt;
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break;
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case 3:
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if(strlen($this->salt) != 8) throw new Exception("Invalid salt length");
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$bytes .= chr($this->hash_algorithm);
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$bytes .= $this->salt;
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$bytes .= chr(OpenPGP::encode_s2k_count($this->count));
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break;
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}
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return $bytes;
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}
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function raw_hash($s) {
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return hash(strtolower(OpenPGP_SignaturePacket::$hash_algorithms[$this->hash_algorithm]), $s, true);
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}
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function sized_hash($s, $size) {
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$hash = $this->raw_hash($s);
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while(strlen($hash) < $size) {
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$s = "\0" . $s;
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$hash .= $this->raw_hash($s);
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}
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return substr($hash, 0, $size);
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}
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function iterate($s) {
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if(strlen($s) >= $this->count) return $s;
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$s = str_repeat($s, ceil($this->count / strlen($s)));
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return substr($s, 0, $this->count);
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}
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function make_key($pass, $size) {
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switch($this->type) {
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case 0:
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return $this->sized_hash($pass, $size);
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case 1:
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return $this->sized_hash($this->salt . $pass, $size);
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case 3:
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return $this->sized_hash($this->iterate($this->salt . $pass), $size);
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}
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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// OpenPGP messages
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/**
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* @see http://tools.ietf.org/html/rfc4880#section-4.1
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* @see http://tools.ietf.org/html/rfc4880#section-11
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* @see http://tools.ietf.org/html/rfc4880#section-11.3
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*/
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class OpenPGP_Message implements IteratorAggregate, ArrayAccess {
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public $uri = NULL;
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public $packets = array();
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static function parse_file($path) {
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if (($msg = self::parse(file_get_contents($path)))) {
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$msg->uri = preg_match('!^[\w\d]+://!', $path) ? $path : 'file://' . realpath($path);
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return $msg;
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}
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}
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/**
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* @see http://tools.ietf.org/html/rfc4880#section-4.1
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* @see http://tools.ietf.org/html/rfc4880#section-4.2
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*/
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static function parse($input) {
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if (is_resource($input)) {
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return self::parse_stream($input);
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}
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if (is_string($input)) {
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return self::parse_string($input);
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}
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}
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static function parse_stream($input) {
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return self::parse_string(stream_get_contents($input));
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}
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static function parse_string($input) {
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$msg = new self;
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while (($length = strlen($input)) > 0) {
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if (($packet = OpenPGP_Packet::parse($input))) {
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$msg[] = $packet;
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}
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if ($length == strlen($input)) { // is parsing stuck?
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break;
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}
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}
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return $msg;
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}
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function __construct(array $packets = array()) {
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$this->packets = $packets;
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}
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function to_bytes() {
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$bytes = '';
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foreach($this as $p) {
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$bytes .= $p->to_bytes();
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}
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return $bytes;
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}
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/**
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* Extract signed objects from a well-formatted message
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*
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* Recurses into CompressedDataPacket
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*
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* @see http://tools.ietf.org/html/rfc4880#section-11
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*/
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function signatures() {
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$msg = $this;
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while($msg[0] instanceof OpenPGP_CompressedDataPacket) $msg = $msg[0]->data;
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$key = NULL;
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$userid = NULL;
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$subkey = NULL;
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$sigs = array();
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$final_sigs = array();
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foreach($msg as $idx => $p) {
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if($p instanceof OpenPGP_LiteralDataPacket) {
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return array(array($p, array_values(array_filter($msg->packets, function($p) {
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return $p instanceof OpenPGP_SignaturePacket;
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}))));
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} else if($p instanceof OpenPGP_PublicSubkeyPacket || $p instanceof OpenPGP_SecretSubkeyPacket) {
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if($userid) {
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array_push($final_sigs, array($key, $userid, $sigs));
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$userid = NULL;
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} else if($subkey) {
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array_push($final_sigs, array($key, $subkey, $sigs));
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$key = NULL;
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}
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$sigs = array();
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$subkey = $p;
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} else if($p instanceof OpenPGP_PublicKeyPacket) {
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if($userid) {
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array_push($final_sigs, array($key, $userid, $sigs));
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$userid = NULL;
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} else if($subkey) {
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array_push($final_sigs, array($key, $subkey, $sigs));
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$subkey = NULL;
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} else if($key) {
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array_push($final_sigs, array($key, $sigs));
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$key = NULL;
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}
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$sigs = array();
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$key = $p;
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} else if($p instanceof OpenPGP_UserIDPacket) {
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if($userid) {
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array_push($final_sigs, array($key, $userid, $sigs));
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$userid = NULL;
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} else if($key) {
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array_push($final_sigs, array($key, $sigs));
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}
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$sigs = array();
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$userid = $p;
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} else if($p instanceof OpenPGP_SignaturePacket) {
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$sigs[] = $p;
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}
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}
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if($userid) {
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array_push($final_sigs, array($key, $userid, $sigs));
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} else if($subkey) {
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array_push($final_sigs, array($key, $subkey, $sigs));
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} else if($key) {
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array_push($final_sigs, array($key, $sigs));
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}
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return $final_sigs;
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}
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/**
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* Function to extract verified signatures
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* $verifiers is an array of callbacks formatted like array('RSA' => array('SHA256' => CALLBACK)) that take two parameters: raw message and signature packet
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*/
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function verified_signatures($verifiers) {
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$signed = $this->signatures();
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$vsigned = array();
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foreach($signed as $sign) {
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$signatures = array_pop($sign);
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$vsigs = array();
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foreach($signatures as $sig) {
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$verifier = $verifiers[$sig->key_algorithm_name()][$sig->hash_algorithm_name()];
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if($verifier && $this->verify_one($verifier, $sign, $sig)) {
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$vsigs[] = $sig;
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}
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}
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array_push($sign, $vsigs);
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$vsigned[] = $sign;
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}
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return $vsigned;
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}
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function verify_one($verifier, $sign, $sig) {
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if($sign[0] instanceof OpenPGP_LiteralDataPacket) {
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$sign[0]->normalize();
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$raw = $sign[0]->data;
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} else if(isset($sign[1]) && $sign[1] instanceof OpenPGP_UserIDPacket) {
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$raw = implode('', array_merge($sign[0]->fingerprint_material(), array(chr(0xB4),
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pack('N', strlen($sign[1]->body())), $sign[1]->body())));
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} else if(isset($sign[1]) && ($sign[1] instanceof OpenPGP_PublicSubkeyPacket || $sign[1] instanceof OpenPGP_SecretSubkeyPacket)) {
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$raw = implode('', array_merge($sign[0]->fingerprint_material(), $sign[1]->fingerprint_material()));
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} else if($sign[0] instanceof OpenPGP_PublicKeyPacket) {
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$raw = implode('', $sign[0]->fingerprint_material());
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} else {
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return NULL;
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}
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return call_user_func($verifier, $raw.$sig->trailer, $sig);
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}
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// IteratorAggregate interface
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function getIterator() {
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return new ArrayIterator($this->packets);
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}
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// ArrayAccess interface
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function offsetExists($offset) {
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return isset($this->packets[$offset]);
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}
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function offsetGet($offset) {
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return $this->packets[$offset];
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}
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function offsetSet($offset, $value) {
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return is_null($offset) ? $this->packets[] = $value : $this->packets[$offset] = $value;
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}
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function offsetUnset($offset) {
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unset($this->packets[$offset]);
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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// OpenPGP packets
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/**
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* OpenPGP packet.
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*
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* @see http://tools.ietf.org/html/rfc4880#section-4.1
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* @see http://tools.ietf.org/html/rfc4880#section-4.3
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*/
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class OpenPGP_Packet {
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public $tag, $size, $data;
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static function class_for($tag) {
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return isset(self::$tags[$tag]) && class_exists(
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$class = 'OpenPGP_' . self::$tags[$tag] . 'Packet') ? $class : __CLASS__;
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}
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/**
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* Parses an OpenPGP packet.
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*
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* Partial body lengths based on https://github.com/toofishes/python-pgpdump/blob/master/pgpdump/packet.py
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*
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* @see http://tools.ietf.org/html/rfc4880#section-4.2
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*/
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static function parse(&$input) {
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$packet = NULL;
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if (strlen($input) > 0) {
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$parser = ord($input[0]) & 64 ? 'parse_new_format' : 'parse_old_format';
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$header_start0 = 0;
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$consumed = 0;
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$packet_data = "";
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do {
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list($tag, $data_offset, $data_length, $partial) = self::$parser($input, $header_start0);
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$data_start0 = $header_start0 + $data_offset;
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$header_start0 = $data_start0 + $data_length - 1;
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$packet_data .= substr($input, $data_start0, $data_length);
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$consumed += $data_offset + $data_length;
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if ($partial) {
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$consumed -= 1;
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}
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} while ($partial === true && $parser === 'parse_new_format');
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if ($tag && ($class = self::class_for($tag))) {
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$packet = new $class();
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$packet->tag = $tag;
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$packet->input = $packet_data;
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$packet->length = strlen($packet_data);
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$packet->read();
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unset($packet->input);
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unset($packet->length);
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}
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$input = substr($input, $consumed);
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}
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return $packet;
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}
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/**
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* Parses a new-format (RFC 4880) OpenPGP packet.
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*
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* @see http://tools.ietf.org/html/rfc4880#section-4.2.2
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*/
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static function parse_new_format($input, $header_start = 0) {
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$tag = ord($input[0]) & 63;
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$len = ord($input[$header_start + 1]);
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if($len < 192) { // One octet length
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return array($tag, 2, $len, false);
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}
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if($len > 191 && $len < 224) { // Two octet length
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return array($tag, 3, (($len - 192) << 8) + ord($input[$header_start + 2]) + 192, false);
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}
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if($len == 255) { // Five octet length
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$unpacked = unpack('N', substr($input, $header_start + 2, 4));
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return array($tag, 6, reset($unpacked), false);
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}
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// Partial body lengths
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return array($tag, 2, 1 << ($len & 0x1f), true);
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}
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/**
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* Parses an old-format (PGP 2.6.x) OpenPGP packet.
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*
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* @see http://tools.ietf.org/html/rfc4880#section-4.2.1
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*/
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static function parse_old_format($input) {
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$len = ($tag = ord($input[0])) & 3;
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$tag = ($tag >> 2) & 15;
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switch ($len) {
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case 0: // The packet has a one-octet length. The header is 2 octets long.
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$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($unpacked);
|
|
}
|
|
|
|
function read_byte() {
|
|
return !is_null($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:
|
|
if(ord($this->read_byte()) != 5) {
|
|
throw new Exception("Invalid version 2 or 3 SignaturePacket");
|
|
}
|
|
$this->signature_type = ord($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, $version=4) {
|
|
parent::__construct();
|
|
|
|
if($key instanceof OpenPGP_PublicKeyPacket) {
|
|
$this->algorithm = $key->algorithm;
|
|
$this->key = array();
|
|
|
|
// Restrict to only the fields we need
|
|
foreach (self::$key_fields[$this->algorithm] as $field) {
|
|
$this->key[$field] = $key->key[$field];
|
|
}
|
|
|
|
$this->key_id = $key->key_id;
|
|
$this->fingerprint = $key->fingerprint;
|
|
$this->timestamp = $key->timestamp;
|
|
$this->version = $key->version;
|
|
$this->v3_days_of_validity = $key->v3_days_of_validity;
|
|
} else {
|
|
$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 $algorithms = array(0 => 'Uncompressed', 1 => 'ZIP', 2 => 'ZLIB', 3 => 'BZip2');
|
|
|
|
function __construct($m=NULL, $algorithm=1) {
|
|
parent::__construct();
|
|
$this->algorithm = $algorithm;
|
|
$this->data = $m ? $m : new OpenPGP_Message();
|
|
}
|
|
|
|
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']) ? $opt['timestamp'] : time();
|
|
}
|
|
|
|
function normalize($clearsign=false) {
|
|
if($clearsign && ($this->format != 'u' && $this->format != 't')) {
|
|
$this->format = 'u'; // Clearsign must be text
|
|
}
|
|
|
|
if($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", $this->data)));
|
|
}
|
|
|
|
if($clearsign) {
|
|
// When clearsigning, do not sign over trailing whitespace
|
|
$this->data = preg_replace('/\s+\r/', "\r", $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 {}
|