102 lines
1.8 KiB
PHP
102 lines
1.8 KiB
PHP
<?php
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namespace Leenooks\OpenPGP;
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/**
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* OpenPGP Compressed Data packet (tag 8).
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*
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* @see http://tools.ietf.org/html/rfc4880#section-5.6
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*/
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class CompressedDataPacket extends Packet implements \IteratorAggregate, \ArrayAccess
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{
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protected $tag = 8;
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public $algorithm;
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/* see http://tools.ietf.org/html/rfc4880#section-9.3 */
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static $algorithms = [
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0 => 'Uncompressed',
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1 => 'ZIP',
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2 => 'ZLIB',
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3 => 'BZip2',
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];
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// IteratorAggregate interface
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function getIterator()
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{
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return new \ArrayIterator($this->data->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->data[$offset]);
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}
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function offsetGet($offset) {
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return $this->data[$offset];
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}
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function offsetSet($offset, $value) {
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return is_null($offset) ? $this->data[] = $value : $this->data[$offset] = $value;
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}
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function offsetUnset($offset) {
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unset($this->data[$offset]);
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}
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function body()
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{
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$body = chr($this->algorithm);
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switch($this->algorithm) {
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case 0:
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$body .= $this->data->to_bytes();
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break;
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case 1:
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$body .= gzdeflate($this->data->to_bytes());
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break;
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case 2:
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$body .= gzcompress($this->data->to_bytes());
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break;
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case 3:
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$body .= bzcompress($this->data->to_bytes());
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break;
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default:
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/* @todo error? */
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}
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return $body;
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}
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function read()
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{
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$this->algorithm = ord($this->read_byte());
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$this->data = $this->read_bytes($this->length);
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switch($this->algorithm) {
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case 0:
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$this->data = Message::parse($this->data);
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break;
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case 1:
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$this->data = Message::parse(gzinflate($this->data));
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break;
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case 2:
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$this->data = Message::parse(gzuncompress($this->data));
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break;
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case 3:
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$this->data = Message::parse(bzdecompress($this->data));
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break;
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default:
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/* TODO error? */
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}
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}
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} |