201 lines
12 KiB
HTML
201 lines
12 KiB
HTML
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<title>JSDoc: Source: cleartext.js</title>
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<h1 class="page-title">Source: cleartext.js</h1>
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<pre class="prettyprint source"><code>// GPG4Browsers - An OpenPGP implementation in javascript
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// Copyright (C) 2011 Recurity Labs GmbH
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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/**
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* @requires config
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* @requires encoding/armor
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* @requires enums
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* @requires packet
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* @module cleartext
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*/
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var config = require('./config'),
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packet = require('./packet'),
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enums = require('./enums.js'),
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armor = require('./encoding/armor.js');
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/**
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* @class
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* @classdesc Class that represents an OpenPGP cleartext signed message.
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* See {@link http://tools.ietf.org/html/rfc4880#section-7}
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* @param {String} text The cleartext of the signed message
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* @param {module:packet/packetlist} packetlist The packetlist with signature packets or undefined
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* if message not yet signed
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*/
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function CleartextMessage(text, packetlist) {
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if (!(this instanceof CleartextMessage)) {
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return new CleartextMessage(packetlist);
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}
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// normalize EOL to canonical form <CR><LF>
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this.text = text.replace(/\r/g, '').replace(/[\t ]+\n/g, "\n").replace(/\n/g,"\r\n");
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this.packets = packetlist || new packet.List();
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}
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/**
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* Returns the key IDs of the keys that signed the cleartext message
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* @return {Array<module:type/keyid>} array of keyid objects
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*/
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CleartextMessage.prototype.getSigningKeyIds = function() {
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var keyIds = [];
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var signatureList = this.packets.filterByTag(enums.packet.signature);
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signatureList.forEach(function(packet) {
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keyIds.push(packet.issuerKeyId);
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});
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return keyIds;
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};
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/**
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* Sign the cleartext message
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* @param {Array<module:key~Key>} privateKeys private keys with decrypted secret key data for signing
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*/
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CleartextMessage.prototype.sign = function(privateKeys) {
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var packetlist = new packet.List();
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var literalDataPacket = new packet.Literal();
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literalDataPacket.setText(this.text);
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for (var i = 0; i < privateKeys.length; i++) {
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var signaturePacket = new packet.Signature();
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signaturePacket.signatureType = enums.signature.text;
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signaturePacket.hashAlgorithm = config.prefer_hash_algorithm;
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var signingKeyPacket = privateKeys[i].getSigningKeyPacket();
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signaturePacket.publicKeyAlgorithm = signingKeyPacket.algorithm;
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if (!signingKeyPacket.isDecrypted) throw new Error('Private key is not decrypted.');
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signaturePacket.sign(signingKeyPacket, literalDataPacket);
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packetlist.push(signaturePacket);
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}
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this.packets = packetlist;
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};
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/**
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* Verify signatures of cleartext signed message
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* @param {Array<module:key~Key>} publicKeys public keys to verify signatures
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* @return {Array<{keyid: module:type/keyid, valid: Boolean}>} list of signer's keyid and validity of signature
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*/
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CleartextMessage.prototype.verify = function(publicKeys) {
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var result = [];
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var signatureList = this.packets.filterByTag(enums.packet.signature);
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var literalDataPacket = new packet.Literal();
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// we assume that cleartext signature is generated based on UTF8 cleartext
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literalDataPacket.setText(this.text);
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publicKeys.forEach(function(pubKey) {
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for (var i = 0; i < signatureList.length; i++) {
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var publicKeyPacket = pubKey.getPublicKeyPacket([signatureList[i].issuerKeyId]);
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if (publicKeyPacket) {
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var verifiedSig = {};
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verifiedSig.keyid = signatureList[i].issuerKeyId;
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verifiedSig.valid = signatureList[i].verify(publicKeyPacket, literalDataPacket);
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result.push(verifiedSig);
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break;
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}
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}
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});
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return result;
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};
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/**
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* Get cleartext
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* @return {String} cleartext of message
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*/
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CleartextMessage.prototype.getText = function() {
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// normalize end of line to \n
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return this.text.replace(/\r\n/g,"\n");
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};
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/**
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* Returns ASCII armored text of cleartext signed message
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* @return {String} ASCII armor
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*/
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CleartextMessage.prototype.armor = function() {
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var body = {
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hash: enums.read(enums.hash, config.prefer_hash_algorithm).toUpperCase(),
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text: this.text,
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data: this.packets.write()
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};
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return armor.encode(enums.armor.signed, body);
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};
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/**
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* reads an OpenPGP cleartext signed message and returns a CleartextMessage object
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* @param {String} armoredText text to be parsed
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* @return {module:cleartext~CleartextMessage} new cleartext message object
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* @static
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*/
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function readArmored(armoredText) {
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var input = armor.decode(armoredText);
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if (input.type !== enums.armor.signed) {
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throw new Error('No cleartext signed message.');
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}
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var packetlist = new packet.List();
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packetlist.read(input.data);
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var newMessage = new CleartextMessage(input.text, packetlist);
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return newMessage;
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}
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exports.CleartextMessage = CleartextMessage;
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exports.readArmored = readArmored;
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</code></pre>
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</article>
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</section>
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<h2><a href="index.html">Index</a></h2><h3>Modules</h3><ul><li><a href="module-cleartext.html">cleartext</a></li><li><a href="module-config.html">config</a></li><li><a href="config.html">config/config</a></li><li><a href="localStorage.html">config/localStorage</a></li><li><a href="module-crypto.html">crypto</a></li><li><a href="cfb.html">crypto/cfb</a></li><li><a href="cipher.html">crypto/cipher</a></li><li><a href="aes.html">crypto/cipher/aes</a></li><li><a href="blowfish.html">crypto/cipher/blowfish</a></li><li><a href="cast5.html">crypto/cipher/cast5</a></li><li><a href="des.html">crypto/cipher/des</a></li><li><a href="twofish.html">crypto/cipher/twofish</a></li><li><a href="crypto.html">crypto/crypto</a></li><li><a href="hash.html">crypto/hash</a></li><li><a href="md5.html">crypto/hash/md5</a></li><li><a href="ripe-md.html">crypto/hash/ripe-md</a></li><li><a href="sha.html">crypto/hash/sha</a></li><li><a href="pkcs1.html">crypto/pkcs1</a></li><li><a href="public_key.html">crypto/public_key</a></li><li><a href="dsa.html">crypto/public_key/dsa</a></li><li><a href="elgamal.html">crypto/public_key/elgamal</a></li><li><a href="jsbn.html">crypto/public_key/jsbn</a></li><li><a href="rsa.html">crypto/public_key/rsa</a></li><li><a href="random.html">crypto/random</a></li><li><a href="signature.html">crypto/signature</a></li><li><a href="armor.html">encoding/armor</a></li><li><a href="base64.html">encoding/base64</a></li><li><a href="module-enums.html">enums</a></li><li><a href="module-key.html">key</a></li><li><a href="module-keyring.html">keyring</a></li><li><a href="keyring.html">keyring/keyring</a></li><li><a href="localstore.html">keyring/localstore</a></li><li><a href="module-message.html">message</a></li><li><a href="module-openpgp.html">openpgp</a></li><li><a href="module-packet.html">packet</a></li><li><a href="compressed.html">packet/compressed</a></li><li><a href="literal.html">packet/literal</a></li><li><a href="marker.html">packet/marker</a></li><li><a href="one_pass_signature.html">packet/one_pass_signature</a></li><li><a href="packet.html">packet/packet</a></li><li><a href="packetlist.html">packet/packetlist</a></li><li><a href="public_key_.html">packet/public_key</a></li><li><a href="public_key_encrypted_session_key.html">packet/public_key_encrypted_session_key</a></li><li><a href="public_subkey.html">packet/public_subkey</a></li><li><a href="secret_key.html">packet/secret_key</a></li><li><a href="secret_subkey.html">packet/secret_subkey</a></li><li><a href="signature_.html">packet/signature</a></li><li><a href="sym_encrypted_integrity_protected.html">packet/sym_encrypted_integrity_protected</a></li><li><a href="sym_encrypted_session_key.html">packet/sym_encrypted_session_key</a></li><li><a href="symmetrically_encrypted.html">packet/symmetrically_encrypted</a></li><li><a href="trust.html">packet/trust</a></li><li><a href="user_attribute.html">packet/user_attribute</a></li><li><a href="userid.html">packet/userid</a></li><li><a href="keyid.html">type/keyid</a></li><li><a href="mpi.html">type/mpi</a></li><li><a href="s2k.html">type/s2k</a></li><li><a href="module-util.html">util</a></li></ul><h3>Classes</h3><ul><li><a href="JXG.Util.html">JXG.Util</a></li><li><a href="module-cleartext-CleartextMessage.html">cleartext~CleartextMessage</a></li><li><a href="localStorage-LocalStorage.html">config/localStorage~LocalStorage</a></li><li><a href="keyring-Keyring.html">keyring/keyring~Keyring</a></li><li><a href="module-key-Key.html">key~Key</a></li><li><a href="module-key-SubKey.html">key~SubKey</a></li><li><a href="module-key-User.html">key~User</a></li><li><a href="module-message-Message.html">message~Message</a></li><li><a href="compressed-Compressed.html">packet/compressed~Compressed</a></li><li><a href="literal-Literal.html">packet/literal~Literal</a></li><li><a href="marker-Marker.html">packet/marker~Marker</a></li><li><a href="one_pass_signature-OnePassSignature.html">packet/one_pass_signature~OnePassSignature</a></li><li><a href="packetlist-Packetlist.html">packet/packetlist~Packetlist</a></li><li><a href="public_key_encrypted_session_key-PublicKeyEncryptedSessionKey.html">packet/public_key_encrypted_session_key~PublicKeyEncryptedSessionKey</a></li><li><a href="public_key-PublicKey.html">packet/public_key~PublicKey</a></li><li><a href="public_subkey-PublicSubkey.html">packet/public_subkey~PublicSubkey</a></li><li><a href="secret_key-SecretKey.html">packet/secret_key~SecretKey</a></li><li><a href="secret_subkey-SecretSubkey.html">packet/secret_subkey~SecretSubkey</a></li><li><a href="signature-Signature.html">packet/signature~Signature</a></li><li><a href="sym_encrypted_integrity_protected-SymEncryptedIntegrityProtected.html">packet/sym_encrypted_integrity_protected~SymEncryptedIntegrityProtected</a></li><li><a href="sym_encrypted_session_key-SymEncryptedSessionKey.html">packet/sym_encrypted_session_key~SymEncryptedSessionKey</a></li><li><a href="symmetrically_encrypted-SymmetricallyEncrypted.html">packet/symmetrically_encrypted~SymmetricallyEncrypted</a></li><li><a href="trust-Trust.html">packet/trust~Trust</a></li><li><a href="user_attribute-UserAttribute.html">packet/user_attribute~UserAttribute</a></li><li><a href="userid-Userid.html">packet/userid~Userid</a></li><li><a href="keyid-Keyid.html">type/keyid~Keyid</a></li><li><a href="mpi-MPI.html">type/mpi~MPI</a></li><li><a href="s2k-S2K.html">type/s2k~S2K</a></li></ul>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.2.2</a> on Fri Jan 10 2014 09:39:09 GMT-0800 (PST)
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