--- /dev/null
+<?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 {}
projects / friendica-addons.git / blobdiff