23295342fc
work correctly with utf8 strings. Fixeda visibility issue with the testing suite and added relevant unit tests.
276 lines
15 KiB
HTML
276 lines
15 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<title>JSDoc: Source: packet/openpgp.packet.encryptedsessionkey.js</title>
|
|
|
|
<script src="scripts/prettify/prettify.js"> </script>
|
|
<script src="scripts/prettify/lang-css.js"> </script>
|
|
<!--[if lt IE 9]>
|
|
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
|
|
<![endif]-->
|
|
<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
|
|
<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
|
|
</head>
|
|
|
|
<body>
|
|
|
|
<div id="main">
|
|
|
|
<h1 class="page-title">Source: packet/openpgp.packet.encryptedsessionkey.js</h1>
|
|
|
|
|
|
|
|
|
|
|
|
<section>
|
|
<article>
|
|
<pre class="prettyprint source"><code>// GPG4Browsers - An OpenPGP implementation in javascript
|
|
// Copyright (C) 2011 Recurity Labs GmbH
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2.1 of the License, or (at your option) any later version.
|
|
//
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
/**
|
|
* @class
|
|
* @classdesc Public-Key Encrypted Session Key Packets (Tag 1)
|
|
*
|
|
* RFC4880 5.1: A Public-Key Encrypted Session Key packet holds the session key
|
|
* used to encrypt a message. Zero or more Public-Key Encrypted Session Key
|
|
* packets and/or Symmetric-Key Encrypted Session Key packets may precede a
|
|
* Symmetrically Encrypted Data Packet, which holds an encrypted message. The
|
|
* message is encrypted with the session key, and the session key is itself
|
|
* encrypted and stored in the Encrypted Session Key packet(s). The
|
|
* Symmetrically Encrypted Data Packet is preceded by one Public-Key Encrypted
|
|
* Session Key packet for each OpenPGP key to which the message is encrypted.
|
|
* The recipient of the message finds a session key that is encrypted to their
|
|
* public key, decrypts the session key, and then uses the session key to
|
|
* decrypt the message.
|
|
*/
|
|
function openpgp_packet_encryptedsessionkey() {
|
|
|
|
/**
|
|
* Parsing function for a publickey encrypted session key packet (tag 1).
|
|
*
|
|
* @param {String} input Payload of a tag 1 packet
|
|
* @param {Integer} position Position to start reading from the input string
|
|
* @param {Integer} len Length of the packet or the remaining length of
|
|
* input at position
|
|
* @return {openpgp_packet_encrypteddata} Object representation
|
|
*/
|
|
function read_pub_key_packet(input, position, len) {
|
|
this.tagType = 1;
|
|
this.packetLength = len;
|
|
var mypos = position;
|
|
if (len < 10) {
|
|
util
|
|
.print_error("openpgp.packet.encryptedsessionkey.js\n" + 'invalid length');
|
|
return null;
|
|
}
|
|
|
|
this.version = input[mypos++].charCodeAt();
|
|
this.keyId = new openpgp_type_keyid();
|
|
this.keyId.read_packet(input, mypos);
|
|
mypos += 8;
|
|
this.publicKeyAlgorithmUsed = input[mypos++].charCodeAt();
|
|
|
|
switch (this.publicKeyAlgorithmUsed) {
|
|
case 1:
|
|
case 2: // RSA
|
|
this.MPIs = new Array();
|
|
this.MPIs[0] = new openpgp_type_mpi();
|
|
this.MPIs[0].read(input, mypos, mypos - position);
|
|
break;
|
|
case 16: // Elgamal
|
|
this.MPIs = new Array();
|
|
this.MPIs[0] = new openpgp_type_mpi();
|
|
this.MPIs[0].read(input, mypos, mypos - position);
|
|
mypos += this.MPIs[0].packetLength;
|
|
this.MPIs[1] = new openpgp_type_mpi();
|
|
this.MPIs[1].read(input, mypos, mypos - position);
|
|
break;
|
|
default:
|
|
util.print_error("openpgp.packet.encryptedsessionkey.js\n"
|
|
+ "unknown public key packet algorithm type "
|
|
+ this.publicKeyAlgorithmType);
|
|
break;
|
|
}
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Create a string representation of a tag 1 packet
|
|
*
|
|
* @param {String} publicKeyId
|
|
* The public key id corresponding to publicMPIs key as string
|
|
* @param {openpgp_type_mpi[]} publicMPIs
|
|
* Multiprecision integer objects describing the public key
|
|
* @param {Integer} pubalgo
|
|
* The corresponding public key algorithm // See RFC4880 9.1
|
|
* @param {Integer} symmalgo
|
|
* The symmetric cipher algorithm used to encrypt the data
|
|
* within an encrypteddatapacket or encryptedintegrity-
|
|
* protecteddatapacket
|
|
* following this packet //See RFC4880 9.2
|
|
* @param {String} sessionkey
|
|
* A string of randombytes representing the session key
|
|
* @return {String} The string representation
|
|
*/
|
|
function write_pub_key_packet(publicKeyId, publicMPIs, pubalgo, symmalgo,
|
|
sessionkey) {
|
|
var result = String.fromCharCode(3);
|
|
var data = String.fromCharCode(symmalgo);
|
|
data += sessionkey;
|
|
var checksum = util.calc_checksum(sessionkey);
|
|
data += String.fromCharCode((checksum >> 8) & 0xFF);
|
|
data += String.fromCharCode((checksum) & 0xFF);
|
|
result += publicKeyId;
|
|
result += String.fromCharCode(pubalgo);
|
|
var mpi = new openpgp_type_mpi();
|
|
var mpiresult = openpgp_crypto_asymetricEncrypt(pubalgo, publicMPIs,
|
|
mpi.create(openpgp_encoding_eme_pkcs1_encode(data,
|
|
publicMPIs[0].mpiByteLength)));
|
|
for ( var i = 0; i < mpiresult.length; i++) {
|
|
result += mpiresult[i];
|
|
}
|
|
result = openpgp_packet.write_packet_header(1, result.length) + result;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Parsing function for a symmetric encrypted session key packet (tag 3).
|
|
*
|
|
* @param {String} input Payload of a tag 1 packet
|
|
* @param {Integer} position Position to start reading from the input string
|
|
* @param {Integer} len
|
|
* Length of the packet or the remaining length of
|
|
* input at position
|
|
* @return {openpgp_packet_encrypteddata} Object representation
|
|
*/
|
|
function read_symmetric_key_packet(input, position, len) {
|
|
this.tagType = 3;
|
|
var mypos = position;
|
|
// A one-octet version number. The only currently defined version is 4.
|
|
this.version = input[mypos++];
|
|
|
|
// A one-octet number describing the symmetric algorithm used.
|
|
this.symmetricKeyAlgorithmUsed = input[mypos++];
|
|
// A string-to-key (S2K) specifier, length as defined above.
|
|
this.s2k = new openpgp_type_s2k();
|
|
this.s2k.read(input, mypos);
|
|
|
|
// Optionally, the encrypted session key itself, which is decrypted
|
|
// with the string-to-key object.
|
|
if ((s2k.s2kLength + mypos) < len) {
|
|
this.encryptedSessionKey = new Array();
|
|
for ( var i = (mypos - position); i < len; i++) {
|
|
this.encryptedSessionKey[i] = input[mypos++];
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
/**
|
|
* Decrypts the session key (only for public key encrypted session key
|
|
* packets (tag 1)
|
|
*
|
|
* @param {openpgp_msg_message} msg
|
|
* The message object (with member encryptedData
|
|
* @param {openpgp_msg_privatekey} key
|
|
* Private key with secMPIs unlocked
|
|
* @return {String} The unencrypted session key
|
|
*/
|
|
function decrypt(msg, key) {
|
|
if (this.tagType == 1) {
|
|
var result = openpgp_crypto_asymetricDecrypt(
|
|
this.publicKeyAlgorithmUsed, key.publicKey.MPIs,
|
|
key.secMPIs, this.MPIs).toMPI();
|
|
var checksum = ((result.charCodeAt(result.length - 2) << 8) + result
|
|
.charCodeAt(result.length - 1));
|
|
var decoded = openpgp_encoding_eme_pkcs1_decode(result.substring(2, result.length - 2), key.publicKey.MPIs[0].getByteLength());
|
|
var sesskey = decoded.substring(1);
|
|
var algo = decoded.charCodeAt(0);
|
|
if (msg.encryptedData.tagType == 18)
|
|
return msg.encryptedData.decrypt(algo, sesskey);
|
|
else
|
|
return msg.encryptedData.decrypt_sym(algo, sesskey);
|
|
} else if (this.tagType == 3) {
|
|
util
|
|
.print_error("Symmetric encrypted sessionkey is not supported!");
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates a string representation of this object (useful for debug
|
|
* purposes)
|
|
*
|
|
* @return {String} The string containing a openpgp description
|
|
*/
|
|
function toString() {
|
|
if (this.tagType == 1) {
|
|
var result = '5.1. Public-Key Encrypted Session Key Packets (Tag 1)\n'
|
|
+ ' KeyId: '
|
|
+ this.keyId.toString()
|
|
+ '\n'
|
|
+ ' length: '
|
|
+ this.packetLength
|
|
+ '\n'
|
|
+ ' version:'
|
|
+ this.version
|
|
+ '\n'
|
|
+ ' pubAlgUs:'
|
|
+ this.publicKeyAlgorithmUsed + '\n';
|
|
for ( var i = 0; i < this.MPIs.length; i++) {
|
|
result += this.MPIs[i].toString();
|
|
}
|
|
return result;
|
|
} else
|
|
return '5.3 Symmetric-Key Encrypted Session Key Packets (Tag 3)\n'
|
|
+ ' KeyId: ' + this.keyId.toString() + '\n'
|
|
+ ' length: ' + this.packetLength + '\n'
|
|
+ ' version:' + this.version + '\n' + ' symKeyA:'
|
|
+ this.symmetricKeyAlgorithmUsed + '\n' + ' s2k: '
|
|
+ this.s2k + '\n';
|
|
}
|
|
|
|
this.read_pub_key_packet = read_pub_key_packet;
|
|
this.read_symmetric_key_packet = read_symmetric_key_packet;
|
|
this.write_pub_key_packet = write_pub_key_packet;
|
|
this.toString = toString;
|
|
this.decrypt = decrypt;
|
|
};
|
|
|
|
</code></pre>
|
|
</article>
|
|
</section>
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
<nav>
|
|
<h2><a href="index.html">Index</a></h2><h3>Classes</h3><ul><li><a href="_openpgp_packet.html">_openpgp_packet</a></li><li><a href="JXG.Util.html">Util</a></li><li><a href="openpgp.html">openpgp</a></li><li><a href="openpgp_config.html">openpgp_config</a></li><li><a href="openpgp_keyring.html">openpgp_keyring</a></li><li><a href="openpgp_msg_message.html">openpgp_msg_message</a></li><li><a href="openpgp_msg_privatekey.html">openpgp_msg_privatekey</a></li><li><a href="openpgp_msg_publickey.html">openpgp_msg_publickey</a></li><li><a href="openpgp_packet_compressed.html">openpgp_packet_compressed</a></li><li><a href="openpgp_packet_encrypteddata.html">openpgp_packet_encrypteddata</a></li><li><a href="openpgp_packet_encryptedintegrityprotecteddata.html">openpgp_packet_encryptedintegrityprotecteddata</a></li><li><a href="openpgp_packet_encryptedsessionkey.html">openpgp_packet_encryptedsessionkey</a></li><li><a href="openpgp_packet_keymaterial.html">openpgp_packet_keymaterial</a></li><li><a href="openpgp_packet_literaldata.html">openpgp_packet_literaldata</a></li><li><a href="openpgp_packet_marker.html">openpgp_packet_marker</a></li><li><a href="openpgp_packet_modificationdetectioncode.html">openpgp_packet_modificationdetectioncode</a></li><li><a href="openpgp_packet_onepasssignature.html">openpgp_packet_onepasssignature</a></li><li><a href="openpgp_packet_signature.html">openpgp_packet_signature</a></li><li><a href="openpgp_packet_userattribute.html">openpgp_packet_userattribute</a></li><li><a href="openpgp_packet_userid.html">openpgp_packet_userid</a></li><li><a href="openpgp_type_keyid.html">openpgp_type_keyid</a></li><li><a href="openpgp_type_mpi.html">openpgp_type_mpi</a></li><li><a href="openpgp_type_s2k.html">openpgp_type_s2k</a></li></ul><h3>Global</h3><ul><li><a href="global.html#bin2str">bin2str</a></li><li><a href="global.html#calc_checksum">calc_checksum</a></li><li><a href="global.html#crc_table">crc_table</a></li><li><a href="global.html#decode_utf8">decode_utf8</a></li><li><a href="global.html#encode_utf8">encode_utf8</a></li><li><a href="global.html#get_hashAlgorithmString">get_hashAlgorithmString</a></li><li><a href="global.html#getCheckSum">getCheckSum</a></li><li><a href="global.html#getPGPMessageType">getPGPMessageType</a></li><li><a href="global.html#hash_headers">hash_headers</a></li><li><a href="global.html#hex2bin">hex2bin</a></li><li><a href="global.html#hexidump">hexidump</a></li><li><a href="global.html#hexstrdump">hexstrdump</a></li><li><a href="global.html#MD5">MD5</a></li><li><a href="global.html#openpgp_cfb_decrypt">openpgp_cfb_decrypt</a></li><li><a href="global.html#openpgp_cfb_encrypt">openpgp_cfb_encrypt</a></li><li><a href="global.html#openpgp_cfb_mdc">openpgp_cfb_mdc</a></li><li><a href="global.html#openpgp_crypto_asymetricDecrypt">openpgp_crypto_asymetricDecrypt</a></li><li><a href="global.html#openpgp_crypto_asymetricEncrypt">openpgp_crypto_asymetricEncrypt</a></li><li><a href="global.html#openpgp_crypto_generateKeyPair">openpgp_crypto_generateKeyPair</a></li><li><a href="global.html#openpgp_crypto_generateSessionKey">openpgp_crypto_generateSessionKey</a></li><li><a href="global.html#openpgp_crypto_getHashByteLength">openpgp_crypto_getHashByteLength</a></li><li><a href="global.html#openpgp_crypto_getPrefixRandom">openpgp_crypto_getPrefixRandom</a></li><li><a href="global.html#openpgp_crypto_getPseudoRandom">openpgp_crypto_getPseudoRandom</a></li><li><a href="global.html#openpgp_crypto_getRandomBigInteger">openpgp_crypto_getRandomBigInteger</a></li><li><a href="global.html#openpgp_crypto_getRandomBytes">openpgp_crypto_getRandomBytes</a></li><li><a href="global.html#openpgp_crypto_getSecureRandom">openpgp_crypto_getSecureRandom</a></li><li><a href="global.html#openpgp_crypto_hashData">openpgp_crypto_hashData</a></li><li><a href="global.html#openpgp_crypto_MDCSystemBytes">openpgp_crypto_MDCSystemBytes</a></li><li><a href="global.html#openpgp_crypto_signData">openpgp_crypto_signData</a></li><li><a href="global.html#openpgp_crypto_symmetricDecrypt">openpgp_crypto_symmetricDecrypt</a></li><li><a href="global.html#openpgp_crypto_symmetricEncrypt">openpgp_crypto_symmetricEncrypt</a></li><li><a href="global.html#openpgp_crypto_verifySignature">openpgp_crypto_verifySignature</a></li><li><a href="global.html#openpgp_encoding_armor">openpgp_encoding_armor</a></li><li><a href="global.html#openpgp_encoding_armor_addheader">openpgp_encoding_armor_addheader</a></li><li><a href="global.html#openpgp_encoding_base64_decode">openpgp_encoding_base64_decode</a></li><li><a href="global.html#openpgp_encoding_base64_encode">openpgp_encoding_base64_encode</a></li><li><a href="global.html#openpgp_encoding_deArmor">openpgp_encoding_deArmor</a></li><li><a href="global.html#openpgp_encoding_eme_pkcs1_decode">openpgp_encoding_eme_pkcs1_decode</a></li><li><a href="global.html#openpgp_encoding_eme_pkcs1_encode">openpgp_encoding_eme_pkcs1_encode</a></li><li><a href="global.html#openpgp_encoding_emsa_pkcs1_decode">openpgp_encoding_emsa_pkcs1_decode</a></li><li><a href="global.html#openpgp_encoding_emsa_pkcs1_encode">openpgp_encoding_emsa_pkcs1_encode</a></li><li><a href="global.html#openpgp_encoding_html_encode">openpgp_encoding_html_encode</a></li><li><a href="global.html#print_debug">print_debug</a></li><li><a href="global.html#print_debug_hexstr_dump">print_debug_hexstr_dump</a></li><li><a href="global.html#print_error">print_error</a></li><li><a href="global.html#print_info">print_info</a></li><li><a href="global.html#shiftRight">shiftRight</a></li><li><a href="global.html#str2bin">str2bin</a></li><li><a href="global.html#str2Uint8Array">str2Uint8Array</a></li><li><a href="global.html#Uint8Array2str">Uint8Array2str</a></li><li><a href="global.html#util">util</a></li><li><a href="global.html#verifyCheckSum">verifyCheckSum</a></li></ul>
|
|
</nav>
|
|
|
|
<br clear="both">
|
|
|
|
<footer>
|
|
Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.2.0-dev</a> on Tue Apr 16 2013 10:42:39 GMT+0200 (CEST)
|
|
</footer>
|
|
|
|
<script> prettyPrint(); </script>
|
|
</body>
|
|
</html>
|