186 lines
12 KiB
HTML
186 lines
12 KiB
HTML
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<title>JSDoc: Source: openpgp.msg.message.js</title>
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<h1 class="page-title">Source: openpgp.msg.message.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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* @protected
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* @class
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* @classdesc Top-level message object. Contains information from one or more packets
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*/
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function openpgp_msg_message() {
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// -1 = no valid passphrase submitted
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// -2 = no private key found
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// -3 = decryption error
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// text = valid decryption
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this.text = "";
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this.messagePacket = null;
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this.type = null;
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/**
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* Decrypts a message and generates user interface message out of the found.
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* MDC will be verified as well as message signatures
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* @param {openpgp_msg_privatekey} private_key the private the message is encrypted with (corresponding to the session key)
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* @param {openpgp_packet_encryptedsessionkey} sessionkey the session key to be used to decrypt the message
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* @return {String} plaintext of the message or null on error
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*/
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function decrypt(private_key, sessionkey) {
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return this.decryptAndVerifySignature(private_key, sessionkey).text;
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}
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/**
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* Decrypts a message and generates user interface message out of the found.
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* MDC will be verified as well as message signatures
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* @param {openpgp_msg_privatekey} private_key the private the message is encrypted with (corresponding to the session key)
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* @param {openpgp_packet_encryptedsessionkey} sessionkey the session key to be used to decrypt the message
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* @param {openpgp_msg_publickey} pubkey Array of public keys to check signature against. If not provided, checks local keystore.
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* @return {String} plaintext of the message or null on error
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*/
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function decryptAndVerifySignature(private_key, sessionkey, pubkey) {
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if (private_key == null || sessionkey == null || sessionkey == "")
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return null;
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var decrypted = sessionkey.decrypt(this, private_key.keymaterial);
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if (decrypted == null)
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return null;
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var packet;
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var position = 0;
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var len = decrypted.length;
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var validSignatures = new Array();
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util.print_debug_hexstr_dump("openpgp.msg.messge decrypt:\n",decrypted);
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var messages = openpgp.read_messages_dearmored({text: decrypted, openpgp: decrypted});
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for(var m in messages){
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if(messages[m].data){
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this.text = messages[m].data;
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}
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if(messages[m].signature){
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validSignatures.push(messages[m].verifySignature(pubkey));
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}
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}
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return {text:this.text, validSignatures:validSignatures};
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}
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/**
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* Verifies a message signature. This function can be called after read_message if the message was signed only.
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* @param {openpgp_msg_publickey} pubkey Array of public keys to check signature against. If not provided, checks local keystore.
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* @return {boolean} true if the signature was correct; otherwise false
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*/
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function verifySignature(pubkey) {
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var result = false;
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if (this.signature.tagType == 2) {
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if(!pubkey || pubkey.length == 0){
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var pubkey;
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if (this.signature.version == 4) {
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pubkey = openpgp.keyring.getPublicKeysForKeyId(this.signature.issuerKeyId);
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} else if (this.signature.version == 3) {
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pubkey = openpgp.keyring.getPublicKeysForKeyId(this.signature.keyId);
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} else {
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util.print_error("unknown signature type on message!");
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return false;
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}
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}
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if (pubkey.length == 0)
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util.print_warning("Unable to verify signature of issuer: "+util.hexstrdump(this.signature.issuerKeyId)+". Public key not found in keyring.");
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else {
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for (var i = 0 ; i < pubkey.length; i++) {
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var tohash = this.text.replace(/\r\n/g,"\n").replace(/\n/g,"\r\n");
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if (this.signature.verify(tohash, pubkey[i])) {
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util.print_info("Found Good Signature from "+pubkey[i].obj.userIds[0].text+" (0x"+util.hexstrdump(pubkey[i].obj.getKeyId()).substring(8)+")");
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result = true;
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} else {
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util.print_error("Signature verification failed: Bad Signature from "+pubkey[i].obj.userIds[0].text+" (0x"+util.hexstrdump(pubkey[0].obj.getKeyId()).substring(8)+")");
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}
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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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function toString() {
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var result = "Session Keys:\n";
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if (this.sessionKeys !=null)
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for (var i = 0; i < this.sessionKeys.length; i++) {
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result += this.sessionKeys[i].toString();
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}
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result += "\n\n EncryptedData:\n";
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if(this.encryptedData != null)
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result += this.encryptedData.toString();
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result += "\n\n Signature:\n";
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if(this.signature != null)
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result += this.signature.toString();
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result += "\n\n Text:\n"
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if(this.signature != null)
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result += this.text;
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return result;
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}
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this.decrypt = decrypt;
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this.decryptAndVerifySignature = decryptAndVerifySignature;
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this.verifySignature = verifySignature;
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this.toString = toString;
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}
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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>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 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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>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.2.0-dev</a> on Fri Apr 12 2013 14:20:33 GMT+0200 (CEST)
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