enigmailCommon.js
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enigmailCommon.js
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	/* *** BEGIN LICENSE BLOCK ***
	* Version: MPL 1.1/GPL 2.0/LGPL 2.1
	*
	* The contents of this file are subject to the Mozilla Public
	* License Version 1.1 (the "MPL"); you may not use this file
	* except in compliance with the MPL. You may obtain a copy of
	* the MPL at http://www.mozilla.org/MPL/
	*
	* Software distributed under the MPL is distributed on an "AS
	* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
	* implied. See the MPL for the specific language governing
	* rights and limitations under the MPL.
	*
	* The Original Code is Enigmail.
	*
	* The Initial Developer of the Original Code is Ramalingam Saravanan.
	* Portions created by Ramalingam Saravanan <svn@xmlterm.org> are
	* Copyright (C) 2001 Ramalingam Saravanan. All Rights Reserved.
	*
	* Contributor(s):
	* Patrick Brunschwig <patrick@enigmail.net>
	* Marius Stübs <marius.stuebs@riseup.net>
	*
	* Alternatively, the contents of this file may be used under the terms of
	* either the GNU General Public License Version 2 or later (the "GPL"), or
	* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
	* in which case the provisions of the GPL or the LGPL are applicable instead
	* of those above. If you wish to allow use of your version of this file only
	* under the terms of either the GPL or the LGPL, and not to allow others to
	* use your version of this file under the terms of the MPL, indicate your
	* decision by deleting the provisions above and replace them with the notice
	* and other provisions required by the GPL or the LGPL. If you do not delete
	* the provisions above, a recipient may use your version of this file under
	* the terms of any one of the MPL, the GPL or the LGPL.
	* *** END LICENSE BLOCK *** */

	// enigmailCommon.js: shared JS functions for Enigmail

	// WARNING: This module functions must not be loaded in overlays to standard
	// functionality!

	Components.utils.import("resource://enigmail/enigmailCommon.jsm");
	Components.utils.import("resource://enigmail/commonFuncs.jsm");
	Components.utils.import("resource://enigmail/keyManagement.jsm");


	// The compatible Enigmime version
	var gEnigmimeVersion = "1.4";
	var gEnigmailSvc;
	var gEnigPromptSvc;


	// Maximum size of message directly processed by Enigmail
	const ENIG_MSG_BUFFER_SIZE = 96000;
	const ENIG_MSG_HEADER_SIZE = 16000;
	const ENIG_UNLIMITED_BUFFER_SIZE = -1;

	const ENIG_KEY_BUFFER_SIZE = 64000;

	const ENIG_PROCESSINFO_CONTRACTID = "@mozilla.org/xpcom/process-info;1";
	const ENIG_ENIGMAIL_CONTRACTID = "@mozdev.org/enigmail/enigmail;1";
	const ENIG_STRINGBUNDLE_CONTRACTID = "@mozilla.org/intl/stringbundle;1";
	const ENIG_LOCAL_FILE_CONTRACTID = "@mozilla.org/file/local;1";
	const ENIG_DIRSERVICE_CONTRACTID = "@mozilla.org/file/directory_service;1";
	const ENIG_MIME_CONTRACTID = "@mozilla.org/mime;1";
	const ENIG_WMEDIATOR_CONTRACTID = "@mozilla.org/rdf/datasource;1?name=window-mediator";
	const ENIG_ASS_CONTRACTID = "@mozilla.org/appshell/appShellService;1";
	const ENIG_CLIPBOARD_CONTRACTID = "@mozilla.org/widget/clipboard;1";
	const ENIG_CLIPBOARD_HELPER_CONTRACTID = "@mozilla.org/widget/clipboardhelper;1";
	const ENIG_TRANSFERABLE_CONTRACTID = "@mozilla.org/widget/transferable;1";
	const ENIG_LOCALE_SVC_CONTRACTID = "@mozilla.org/intl/nslocaleservice;1";
	const ENIG_DATE_FORMAT_CONTRACTID = "@mozilla.org/intl/scriptabledateformat;1";
	const ENIG_ACCOUNT_MANAGER_CONTRACTID = "@mozilla.org/messenger/account-manager;1";
	const ENIG_THREAD_MANAGER_CID = "@mozilla.org/thread-manager;1";
	const ENIG_SIMPLEURI_CONTRACTID = "@mozilla.org/network/simple-uri;1";
	const ENIG_SEAMONKEY_ID = "{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}";


	const ENIG_STANDARD_URL_CONTRACTID = "@mozilla.org/network/standard-url;1";
	const ENIG_SCRIPTABLEINPUTSTREAM_CONTRACTID = "@mozilla.org/scriptableinputstream;1";
	const ENIG_BINARYINPUTSTREAM_CONTRACTID = "@mozilla.org/binaryinputstream;1";
	const ENIG_SAVEASCHARSET_CONTRACTID = "@mozilla.org/intl/saveascharset;1";

	const ENIG_STREAMCONVERTERSERVICE_CID_STR =
	"{892FFEB0-3F80-11d3-A16C-0050041CAF44}";


	const ENIG_ISCRIPTABLEUNICODECONVERTER_CONTRACTID = "@mozilla.org/intl/scriptableunicodeconverter";

	const ENIG_IOSERVICE_CONTRACTID = "@mozilla.org/network/io-service;1";

	const ENIG_C = Components.classes;
	const ENIG_I = Components.interfaces;

	// Key algorithms
	const ENIG_KEYTYPE_DSA = 1;
	const ENIG_KEYTYPE_RSA = 2;


	// field ID's of key list (as described in the doc/DETAILS file in the GnuPG distribution)
	const ENIG_KEY_TRUST=1;
	const ENIG_KEY_ID = 4;
	const ENIG_CREATED = 5;
	const ENIG_EXPIRY = 6;
	const ENIG_UID_ID = 7;
	const ENIG_OWNERTRUST = 8;
	const ENIG_USER_ID = 9;
	const ENIG_SIG_TYPE = 10;
	const ENIG_KEY_USE_FOR = 11;

	const ENIG_KEY_EXPIRED="e";
	const ENIG_KEY_REVOKED="r";
	const ENIG_KEY_INVALID="i";
	const ENIG_KEY_DISABLED="d";
	const ENIG_KEY_NOT_VALID=ENIG_KEY_EXPIRED+ENIG_KEY_REVOKED+ENIG_KEY_INVALID+ENIG_KEY_DISABLED;


	// GUI List: The corresponding image to set the "active" flag / checkbox
	const ENIG_IMG_NOT_SELECTED = "chrome://enigmail/content/check0.png";
	const ENIG_IMG_SELECTED = "chrome://enigmail/content/check1.png";
	const ENIG_IMG_DISABLED = "chrome://enigmail/content/check2.png";


	// Interfaces
	const nsIEnigmail = ENIG_I.nsIEnigmail;

	// Encryption flags
	if (nsIEnigmail) {
	const ENIG_SIGN = nsIEnigmail.SEND_SIGNED;
	const ENIG_ENCRYPT = nsIEnigmail.SEND_ENCRYPTED;
	const ENIG_ENCRYPT_OR_SIGN = ENIG_ENCRYPT \| ENIG_SIGN;
	}

	// UsePGPMimeOption values
	const PGP_MIME_NEVER = 0;
	const PGP_MIME_POSSIBLE = 1;
	const PGP_MIME_ALWAYS = 2;

	const ENIG_POSSIBLE_PGPMIME = -2081;
	const ENIG_PGP_DESKTOP_ATT = -2082;

	var gUsePGPMimeOptionList = ["usePGPMimeNever",
	"usePGPMimePossible",
	"usePGPMimeAlways"];

	var gEnigRecipientsSelection = ["-",
	"perRecipientRules",
	"perRecipientRulesAndEmail",
	"perEmailAddress",
	"askRecipientsAlways"];

	var gEnigAutoSendEncrypted = ["autoSendEncryptedNever",
	"autoSendEncryptedIfValid"];

	var gEnigConfirmBeforeSending = ["confirmBeforeSendingNever",
	"confirmBeforeSendingAlways",
	"confirmBeforeSendingIfEncrypted",
	"confirmBeforeSendingIfNotEncrypted",
	"confirmBeforeSendingIfRules"];

	const ENIG_BUTTON_POS_0 = 1;
	const ENIG_BUTTON_POS_1 = 1 << 8;
	const ENIG_BUTTON_POS_2 = 1 << 16;
	const ENIG_BUTTON_TITLE_IS_STRING = 127;

	const ENIG_HEADERMODE_KEYID = 0x01;
	const ENIG_HEADERMODE_URL = 0x10;



	function EnigGetFrame(win, frameName) {
	return EnigmailCommon.getFrame(win, frameName);
	}

	// Initializes enigmailCommon
	function EnigInitCommon(id) {
	DEBUG_LOG("enigmailCommon.js: EnigInitCommon: id="+id+"\n");

	gEnigPromptSvc = enigGetService("@mozilla.org/embedcomp/prompt-service;1", "nsIPromptService");
	}


	function GetEnigmailSvc() {
	if (! gEnigmailSvc)
	gEnigmailSvc = EnigmailCommon.getService(window);
	return gEnigmailSvc;
	}

	// maxBytes == -1 => read everything
	function EnigReadURLContents(url, maxBytes) {
	DEBUG_LOG("enigmailCommon.js: EnigReadURLContents: url="+url+
	", "+maxBytes+"\n");

	var ioServ = enigGetService(ENIG_IOSERVICE_CONTRACTID, "nsIIOService");
	if (!ioServ)
	throw Components.results.NS_ERROR_FAILURE;

	var fileChannel = ioServ.newChannel(url, null, null);

	var rawInStream = fileChannel.open();

	var inStream = ENIG_C[ENIG_BINARYINPUTSTREAM_CONTRACTID].createInstance(ENIG_I.nsIBinaryInputStream);
	inStream.setInputStream(rawInStream);

	var available = inStream.available();
	if ((maxBytes < 0) \|\| (maxBytes > available))
	maxBytes = available;

	var data = inStream.readBytes(maxBytes);

	inStream.close();

	return data;
	}

	// maxBytes == -1 => read whole file
	function EnigReadFileContents(localFile, maxBytes) {

	DEBUG_LOG("enigmailCommon.js: EnigReadFileContents: file="+localFile.leafName+
	", "+maxBytes+"\n");

	if (!localFile.exists() \|\| !localFile.isReadable())
	throw Components.results.NS_ERROR_FAILURE;

	var ioServ = enigGetService(ENIG_IOSERVICE_CONTRACTID, "nsIIOService");
	if (!ioServ)
	throw Components.results.NS_ERROR_FAILURE;

	var fileURI = ioServ.newFileURI(localFile);
	return EnigReadURLContents(fileURI.asciiSpec, maxBytes);

	}

	///////////////////////////////////////////////////////////////////////////////

	function WRITE_LOG(str) {
	EnigmailCommon.WRITE_LOG(str);
	}

	function DEBUG_LOG(str) {
	EnigmailCommon.DEBUG_LOG(str);
	}

	function WARNING_LOG(str) {
	EnigmailCommon.WARNING_LOG(str);
	}

	function ERROR_LOG(str) {
	EnigmailCommon.ERROR_LOG(str);
	}

	function CONSOLE_LOG(str) {
	EnigmailCommon.CONSOLE_LOG(str);
	}


	// write exception information
	function EnigWriteException(referenceInfo, ex) {
	EnigmailCommon.writeException(referenceInfo, ex);
	}

	///////////////////////////////////////////////////////////////////////////////

	function EnigAlert(mesg) {
	return EnigmailCommon.alert(window, mesg);
	}

	/**
	* Displays an alert dialog with 3-4 optional buttons.
	* checkBoxLabel: if not null, display checkbox with text; the checkbox state is returned in checkedObj
	* button-Labels: use "&" to indicate access key
	* use "buttonType:label" or ":buttonType" to indicate special button types
	* (buttonType is one of cancel, help, extra1, extra2)
	* return: 0-2: button Number pressed
	* -1: ESC or close window button pressed
	*
	*/
	function EnigLongAlert(mesg, checkBoxLabel, okLabel, labelButton2, labelButton3, checkedObj) {
	return EnigmailCommon.longAlert(window, mesg, checkBoxLabel, okLabel, labelButton2, labelButton3, checkedObj);
	}

	function EnigAlertPref(mesg, prefText) {
	return EnigmailCommon.alertPref(window, mesg, prefText);
	}

	// Confirmation dialog with OK / Cancel buttons (both customizable)
	function EnigConfirm(mesg, okLabel, cancelLabel) {
	return EnigmailCommon.confirmDlg(window, mesg, okLabel, cancelLabel);
	}


	function EnigConfirmPref(mesg, prefText, okLabel, cancelLabel) {
	return EnigmailCommon.confirmPref(window, mesg, prefText, okLabel, cancelLabel);
	}

	function EnigError(mesg) {
	return gEnigPromptSvc.alert(window, EnigGetString("enigError"), mesg);
	}

	function EnigPrefWindow(showBasic, clientType, selectTab) {
	DEBUG_LOG("enigmailCommon.js: EnigPrefWindow\n");
	EnigmailFuncs.openPrefWindow(window, showBasic, selectTab);
	}


	function EnigHelpWindow(source) {
	EnigmailFuncs.openHelpWindow(source);
	}


	function EnigDisplayRadioPref(prefName, prefValue, optionElementIds) {
	DEBUG_LOG("enigmailCommon.js: EnigDisplayRadioPref: "+prefName+", "+prefValue+"\n");

	if (prefValue >= optionElementIds.length)
	return;

	var groupElement = document.getElementById("enigmail_"+prefName);
	var optionElement = document.getElementById(optionElementIds[prefValue]);

	if (groupElement && optionElement) {
	groupElement.selectedItem = optionElement;
	groupElement.value = prefValue;
	}
	}

	function EnigSetRadioPref(prefName, optionElementIds) {
	DEBUG_LOG("enigmailCommon.js: EnigSetRadioPref: "+prefName+"\n");

	try {
	var groupElement = document.getElementById("enigmail_"+prefName);
	if (groupElement) {
	var optionElement = groupElement.selectedItem;
	var prefValue = optionElement.value;
	if (prefValue < optionElementIds.length) {
	EnigSetPref(prefName, prefValue);
	groupElement.value = prefValue;
	}
	}
	}
	catch (ex) {}
	}

	function EnigSavePrefs() {
	return EnigmailCommon.savePrefs();
	}

	function EnigGetPref(prefName) {
	return EnigmailCommon.getPref(prefName);
	}

	function EnigGetDefaultPref(prefName) {
	DEBUG_LOG("enigmailCommon.js: EnigGetDefaultPref: prefName="+prefName+"\n");
	var prefValue=null;
	try {
	EnigmailCommon.prefBranch.lockPref(prefName);
	prefValue = EnigGetPref(prefName);
	EnigmailCommon.prefBranch.unlockPref(prefName);
	}
	catch (ex) {}

	return prefValue;
	}

	function EnigSetPref(prefName, value) {
	return EnigmailCommon.setPref(prefName, value);
	}

	function EnigGetSignMsg(identity) {
	EnigmailFuncs.getSignMsg(identity);
	}


	function EnigConvertFromUnicode(text, charset) {
	DEBUG_LOG("enigmailCommon.js: EnigConvertFromUnicode: "+charset+"\n");

	if (!text)
	return "";

	if (! charset) charset="utf-8";

	// Encode plaintext
	try {
	var unicodeConv = ENIG_C[ENIG_ISCRIPTABLEUNICODECONVERTER_CONTRACTID].getService(ENIG_I.nsIScriptableUnicodeConverter);

	unicodeConv.charset = charset;
	return unicodeConv.ConvertFromUnicode(text);

	} catch (ex) {
	DEBUG_LOG("enigmailCommon.js: EnigConvertFromUnicode: caught an exception\n");

	return text;
	}
	}


	function EnigConvertToUnicode(text, charset) {
	// DEBUG_LOG("enigmailCommon.js: EnigConvertToUnicode: "+charset+"\n");

	if (!text \|\| !charset /\|\| (charset.toLowerCase() == "iso-8859-1")/)
	return text;

	// Encode plaintext
	try {
	var unicodeConv = ENIG_C[ENIG_ISCRIPTABLEUNICODECONVERTER_CONTRACTID].getService(ENIG_I.nsIScriptableUnicodeConverter);

	unicodeConv.charset = charset;
	return unicodeConv.ConvertToUnicode(text);

	} catch (ex) {
	DEBUG_LOG("enigmailCommon.js: EnigConvertToUnicode: caught an exception while converting'"+text+"' to "+charset+"\n");
	return text;
	}
	}

	function EnigConvertGpgToUnicode(text) {
	return EnigmailCommon.convertGpgToUnicode(text);
	}

	function EnigFormatFpr(fingerprint) {
	return EnigmailFuncs.formatFpr(fingerprint);
	}

	/////////////////////////
	// Console stuff
	/////////////////////////


	// return the options passed to a window
	function EnigGetWindowOptions() {
	var winOptions=[];
	if (window.location.search) {
	var optList=window.location.search.substr(1).split(/\&/);
	for (var i=0; i<optList.length; i++) {
	var anOption=optList[i].split(/\=/);
	winOptions[anOption[0]] = unescape(anOption[1]);
	}
	}
	return winOptions;
	}

	function EnigRulesEditor() {
	EnigmailFuncs.openRulesEditor();
	}

	function EngmailCardDetails() {
	EnigmailFuncs.openCardDetails();
	}

	function EnigKeygen() {
	EnigmailFuncs.openKeyGen();

	}

	// retrieves a localized string from the enigmail.properties stringbundle
	function EnigGetString(aStr) {
	var argList = new Array();
	// unfortunately arguments.shift() doesn't work, so we use a workaround

	if (arguments.length > 1)
	for (let i=1; i<arguments.length; i++)
	argList.push(arguments[i]);
	return EnigmailCommon.getString(aStr, (arguments.length > 1 ? argList : null));
	}

	// Remove all quoted strings (and angle brackets) from a list of email
	// addresses, returning a list of pure email addresses
	function EnigStripEmail(mailAddrs) {
	return EnigmailFuncs.stripEmail(mailAddrs);
	}


	//get path for temporary directory (e.g. /tmp, C:\TEMP)
	function EnigGetTempDir() {
	return EnigmailCommon.getTempDir();
	}

	// get the OS platform
	function EnigGetOS () {
	return EnigmailCommon.getOS();
	}

	function EnigGetVersion() {
	return EnigmailCommon.getVersion();
	}

	function EnigFilePicker(title, displayDir, save, defaultExtension, defaultName, filterPairs) {
	return EnigmailCommon.filePicker(window, title, displayDir, save, defaultExtension,
	defaultName, filterPairs);
	}

	// get keys from keyserver
	function EnigDownloadKeys(inputObj, resultObj) {
	return EnigmailFuncs.downloadKeys(window, inputObj, resultObj);
	}

	// create new PGP Rule
	function EnigNewRule(emailAddress) {
	return EnigmailFuncs.createNewRule(window, emailAddress);
	}

	function EnigGetTrustCode(keyObj) {
	return EnigmailFuncs.getTrustCode(keyObj);
	}

	// Load the key list into memory
	// sortDirection: 1 = ascending / -1 = descending

	function EnigLoadKeyList(refresh, keyListObj, sortColumn, sortDirection) {
	return EnigmailFuncs.loadKeyList(window, refresh, keyListObj, sortColumn, sortDirection);
	}

	function EnigEditKeyTrust(userIdArr, keyIdArr) {
	return EnigmailFuncs.editKeyTrust(window, userIdArr, keyIdArr);
	}


	function EnigEditKeyExpiry(userIdArr, keyIdArr) {
	return EnigmailFuncs.editKeyExpiry(window, userIdArr, keyIdArr);
	}

	function EnigDisplayKeyDetails(keyId, refresh) {
	return EnigmailFuncs.openKeyDetails(window, keyId, refresh);
	}

	function EnigSignKey(userId, keyId) {
	return EnigmailFuncs.signKey(window, userId, keyId);
	}


	function EnigChangeKeyPwd(keyId, userId) {

	var enigmailSvc = GetEnigmailSvc();
	if (!enigmailSvc)
	return;

	if (! enigmailSvc.useGpgAgent()) {
	// no gpg-agent: open dialog to enter new passphrase
	var inputObj = {
	keyId: keyId,
	userId: userId
	};

	window.openDialog("chrome://enigmail/content/enigmailChangePasswd.xul",
	"", "dialog,modal,centerscreen", inputObj);
	}
	else {
	// gpg-agent used: gpg-agent will handle everything
	EnigmailKeyMgmt.changePassphrase(window, "0x"+keyId, "", "",
	function _changePwdCb(exitCode, errorMsg) {
	if (exitCode != 0) {
	EnigAlert(EnigGetString("changePassFailed")+"\n\n"+errorMsg);
	}
	});
	}
	}


	function EnigRevokeKey(keyId, userId, callbackFunc) {
	var enigmailSvc = GetEnigmailSvc();
	if (!enigmailSvc)
	return false;

	var userDesc="0x"+keyId.substr(-8,8)+" - "+userId;
	if (!EnigConfirm(EnigGetString("revokeKeyAsk", userDesc), EnigGetString("keyMan.button.revokeKey")))
	return false;

	var tmpDir=EnigGetTempDir();

	try {
	var revFile = ENIG_C[ENIG_LOCAL_FILE_CONTRACTID].createInstance(EnigGetLocalFileApi());
	revFile.initWithPath(tmpDir);
	if (!(revFile.isDirectory() && revFile.isWritable())) {
	EnigAlert(EnigGetString("noTempDir"));
	return false;
	}
	}
	catch (ex) {}
	revFile.append("revkey.asc");

	EnigmailKeyMgmt.genRevokeCert(window, "0x"+keyId, revFile, "0", "",
	function _revokeCertCb(exitCode, errorMsg) {
	if (exitCode != 0) {
	revFile.remove(false);
	EnigAlert(EnigGetString("revokeKeyFailed")+"\n\n"+errorMsg);
	return;
	}
	var errorMsgObj = {};
	var keyList = {};
	var r = enigmailSvc.importKeyFromFile(window, revFile, errorMsgObj, keyList);
	revFile.remove(false);
	if (r != 0) {
	EnigAlert(EnigGetString("revokeKeyFailed")+"\n\n"+EnigConvertGpgToUnicode(errorMsgObj.value));
	}
	else {
	EnigAlert(EnigGetString("revokeKeyOk"));
	}
	if (callbackFunc) {
	callbackFunc(r == 0);
	}
	});
	return true;
	}

	function EnigGetLocalFileApi() {
	return EnigmailCommon.getLocalFileApi();
	}

	function EnigShowPhoto (keyId, userId, photoNumber) {
	EnigmailFuncs.showPhoto(window, keyId, userId, photoNumber);
	}

	function EnigGetFilePath (nsFileObj) {
	return EnigmailCommon.getFilePath(nsFileObj);
	}

	function EnigCreateRevokeCert(keyId, userId, callbackFunc) {
	var defaultFileName = userId.replace(/[\<\>]/g, "");
	defaultFileName += " (0x"+keyId.substr(-8,8)+") rev.asc";
	var outFile = EnigFilePicker(EnigGetString("saveRevokeCertAs"),
	"", true, "*.asc",
	defaultFileName,
	[EnigGetString("asciiArmorFile"), "*.asc"]);
	if (! outFile) return -1;

	var enigmailSvc = GetEnigmailSvc();
	if (!enigmailSvc)
	return -1;

	var errorMsgObj = {};
	EnigmailKeyMgmt.genRevokeCert(window, "0x"+keyId, outFile, "1", "",
	function _revokeCertCb(exitCode, errorMsg) {
	if (exitCode != 0) {
	EnigAlert(EnigGetString("revokeCertFailed")+"\n\n"+errorMsg);
	}
	else {
	EnigAlert(EnigGetString("revokeCertOK"));
	}

	if (callbackFunc) callbackFunc(exitCode == 0);
	});
	return 0;
	}


	// return the label of trust for a given trust code
	function EnigGetTrustLabel(trustCode) {
	var keyTrust;
	switch (trustCode) {
	case 'q':
	keyTrust=EnigGetString("keyValid.unknown");
	break;
	case 'i':
	keyTrust=EnigGetString("keyValid.invalid");
	break;
	case 'd':
	case 'D':
	keyTrust=EnigGetString("keyValid.disabled");
	break;
	case 'r':
	keyTrust=EnigGetString("keyValid.revoked");
	break;
	case 'e':
	keyTrust=EnigGetString("keyValid.expired");
	break;
	case 'n':
	keyTrust=EnigGetString("keyTrust.untrusted");
	break;
	case 'm':
	keyTrust=EnigGetString("keyTrust.marginal");
	break;
	case 'f':
	keyTrust=EnigGetString("keyTrust.full");
	break;
	case 'u':
	keyTrust=EnigGetString("keyTrust.ultimate");
	break;
	case 'g':
	keyTrust=EnigGetString("keyTrust.group");
	break;
	case '-':
	keyTrust="-";
	break;
	default:
	keyTrust="";
	}
	return keyTrust;
	}

	function EnigGetDateTime(dateNum, withDate, withTime) {
	return EnigmailCommon.getDateTime(dateNum, withDate, withTime);
	}

	function enigCreateInstance (aURL, aInterface)
	{
	return ENIG_C[aURL].createInstance(ENIG_I[aInterface]);
	}

	function enigGetService (aURL, aInterface)
	{
	// determine how 'aInterface' is passed and handle accordingly
	switch (typeof(aInterface))
	{
	case "object":
	return ENIG_C[aURL].getService(aInterface);
	break;

	case "string":
	return ENIG_C[aURL].getService(ENIG_I[aInterface]);
	break;

	default:
	return ENIG_C[aURL].getService();
	}

	return null;
	}

	function EnigCollapseAdvanced(obj, attribute, dummy) {
	return EnigmailFuncs.collapseAdvanced(obj, attribute, dummy);
	}

	/**
	* EnigOpenUrlExternally
	*
	* forces a uri to be loaded in an external browser
	*
	* @uri nsIUri object
	*/
	function EnigOpenUrlExternally(uri) {
	let eps = ENIG_C["@mozilla.org/uriloader/external-protocol-service;1"].
	getService(ENIG_I.nsIExternalProtocolService);

	eps.loadUrl(uri, null);
	}

	function EnigOpenURL(event, hrefObj) {
	var xulAppinfo = ENIG_C["@mozilla.org/xre/app-info;1"].getService(ENIG_I.nsIXULAppInfo);
	if (xulAppinfo.ID == ENIG_SEAMONKEY_ID) return;



	try {
	var ioservice = ENIG_C["@mozilla.org/network/io-service;1"].
	getService(ENIG_I.nsIIOService);
	var iUri = ioservice.newURI(hrefObj.href, null, null);

	EnigOpenUrlExternally(iUri);
	event.preventDefault();
	event.stopPropagation();
	}
	catch (ex) {}
	}

	function EnigGetHttpUri (aEvent) {

	function hRefForClickEvent(aEvent, aDontCheckInputElement)
	{
	var href;
	var isKeyCommand = (aEvent.type == "command");
	var target =
	isKeyCommand ? document.commandDispatcher.focusedElement : aEvent.target;

	if (target instanceof HTMLAnchorElement \|\|
	target instanceof HTMLAreaElement \|\|
	target instanceof HTMLLinkElement)
	{
	if (target.hasAttribute("href"))
	href = target.href;
	}
	else if (!aDontCheckInputElement && target instanceof HTMLInputElement)
	{
	if (target.form && target.form.action)
	href = target.form.action;
	}
	else
	{
	// we may be nested inside of a link node
	var linkNode = aEvent.originalTarget;
	while (linkNode && !(linkNode instanceof HTMLAnchorElement))
	linkNode = linkNode.parentNode;

	if (linkNode)
	href = linkNode.href;
	}

	return href;
	}

	// getHttpUri main function

	let href = hRefForClickEvent(aEvent);

	EnigmailCommon.DEBUG_LOG("enigmailAbout.js: interpretHtmlClick: href='"+href+"'\n");

	var ioServ = EnigmailCommon.getIoService();
	var uri = ioServ.newURI(href, null, null);

	if (Components.classes["@mozilla.org/uriloader/external-protocol-service;1"]
	.getService(Components.interfaces.nsIExternalProtocolService)
	.isExposedProtocol(uri.scheme) &&
	(uri.schemeIs("http") \|\| uri.schemeIs("https")))
	return uri;

	return null;
	}


	/**
	* GUI List: Set the "active" flag and the corresponding image
	*/
	function EnigSetActive(element, status) {
	if (status >= 0) {
	element.setAttribute("active", status.toString());
	}

	switch (status)
	{
	case 0:
	element.setAttribute("src", ENIG_IMG_NOT_SELECTED);
	break;
	case 1:
	element.setAttribute("src", ENIG_IMG_SELECTED);
	break;
	case 2:
	element.setAttribute("src", ENIG_IMG_DISABLED);
	break;
	default:
	element.setAttribute("active", -1);
	}
	}


	/**
	* Add each subkey to the GUI list. Use this function if there is a preceeding column with checkboxes.
	*
	* @param XML-DOM GUI element, where the keys will be listed.
	* @param Array Informations of the current key
	* @param Integer Count of all keys (primary + subkeys)
	*
	* The internal logic of this function works so, that the main key is always selected.
	* Also all valid (not expired, not revoked) subkeys are selected. If there is only
	* one subkey, it is also always pre-selected.
	*
	*/
	function EnigAddSubkeyWithSelectboxes(treeChildren, aLine, keyCount) {
	DEBUG_LOG("enigmailCommon.js: EnigAddSubkeyWithSelectboxes("+aLine+")\n");

	var preSelected;
	// Pre-Selection logic:
	if (aLine[1] === "r") {
	// Revoked keys can not be changed.
	preSelected = -1;
	} else {
	if (aLine[0]==="pub") {
	// The primary key is ALWAYS selected.
	preSelected = 1;
	} else if (keyCount === 2) {
	// If only 2 keys are here (primary + 1 subkey) then preSelect them anyway.
	preSelected = 1;
	} else if (aLine[1]==="e") {
	// Expired keys are normally un-selected.
	preSelected = 0;
	} else {
	// A valid subkey is pre-selected.
	preSelected = 1;
	}
	}
	var selectCol=document.createElement("treecell");
	selectCol.setAttribute("id", "indicator");
	EnigSetActive(selectCol, preSelected);


	EnigAddSubkey(treeChildren, aLine, selectCol);
	}

	/**
	* Add each subkey to the GUI list.
	*
	* @param XML-DOM GUI element, where the keys will be listed.
	* @param Array Informations of the current key
	* @param Optional Object If set, it defines if the row is pre-selected
	* (assumed, there is a preceeding select column)
	*/
	function EnigAddSubkey(treeChildren, aLine, selectCol=false) {
	DEBUG_LOG("enigmailCommon.js: EnigAddSubkey("+aLine+")\n");

	// Get expiry state of this subkey
	var expire;
	if (aLine[1]==="r") {
	expire = EnigGetString("keyValid.revoked");
	} else if (aLine[6].length==0) {
	expire = EnigGetString("keyExpiryNever");
	} else {
	expire = EnigGetDateTime(aLine[6], true, false);
	}

	var aRow=document.createElement("treerow");
	var treeItem=document.createElement("treeitem");
	var subkey=EnigGetString(aLine[0]==="sub" ? "keyTypeSubkey" : "keyTypePrimary");
	if (selectCol !== false) {
	aRow.appendChild(selectCol);
	}
	aRow.appendChild(createCell(subkey)); // subkey type
	aRow.appendChild(createCell("0x"+aLine[4].substr(-8,8))); // key id
	aRow.appendChild(createCell(EnigGetString("keyAlgorithm_"+aLine[3]))); // algorithm
	aRow.appendChild(createCell(aLine[2])); // size
	aRow.appendChild(createCell(EnigGetDateTime(aLine[5], true, false))); // created
	aRow.appendChild(createCell(expire)); // expiry

	var usagecodes=aLine[11];
	var usagetext = "";
	var i;
	// e = encrypt
	// s = sign
	// c = certify
	// a = authentication
	// Capital Letters are ignored, as these reflect summary properties of a key

	var singlecode = "";
	for (i=0; i < aLine[11].length; i++) {
	singlecode = aLine[11].substr(i, 1);
	switch (singlecode) {
	case "e":
	if (usagetext.length>0) {
	usagetext = usagetext + ", ";
	}
	usagetext = usagetext + EnigGetString("keyUsageEncrypt");
	break;
	case "s":
	if (usagetext.length>0) {
	usagetext = usagetext + ", ";
	}
	usagetext = usagetext + EnigGetString("keyUsageSign");
	break;
	case "c":
	if (usagetext.length>0) {
	usagetext = usagetext + ", ";
	}
	usagetext = usagetext + EnigGetString("keyUsageCertify");
	break;
	case "a":
	if (usagetext.length>0) {
	usagetext = usagetext + ", ";
	}
	usagetext = usagetext + EnigGetString("keyUsageAuthentication");
	break;
	} // * case *
	} // * for *

	aRow.appendChild(createCell(usagetext)); // usage
	treeItem.appendChild(aRow);
	treeChildren.appendChild(treeItem);
	}

	/**
	* Receive a GUI List and remove all entries
	*
	* @param XML-DOM (it will be changed!)
	*/
	function EnigCleanGuiList(guiList) {
	while (guiList.firstChild) {
	guiList.removeChild(guiList.firstChild);
	}
	}



	/**
	* Process the output of GPG and return the key details
	*
	* @param String Values separated by colons and linebreaks
	*
	* @return Object with the following keys:
	* gUserId: Main user ID
	* calcTrust,
	* ownerTrust,
	* fingerprint,
	* showPhoto,
	* uidList: List of Pseudonyms and E-Mail-Addresses,
	* subkeyList: List of Subkeys
	*/
	function EnigGetKeyDetails(sigListStr) {
	var gUserId;
	var calcTrust;
	var ownerTrust;
	var fingerprint;
	var uidList = [];
	var subkeyList = [];
	var showPhoto = false;

	var sigList = sigListStr.split(/[\n\r]+/);
	for (var i=0; i < sigList.length; i++) {
	var aLine=sigList[i].split(/:/);
	switch (aLine[0]) {
	case "pub":
	gUserId=EnigConvertGpgToUnicode(aLine[9]);
	var calcTrust=aLine[1];
	if (aLine[11].indexOf("D")>=0) {
	calcTrust="d";
	}
	var ownerTrust=aLine[8];
	subkeyList.push(aLine);
	case "uid":
	if (! gUserId) {
	gUserId=EnigConvertGpgToUnicode(aLine[9]);
	}
	else if (uidList !== false) {
	uidList.push(aLine);
	}
	break;
	case "uat":
	// @TODO document what that means
	if (aLine[9].search("1 ") == 0) {
	showPhoto = true;
	}
	break;
	case "sub":
	subkeyList.push(aLine);
	break;
	case "fpr":
	if (fingerprint == null) {
	fingerprint = aLine[9];
	}
	break;
	}
	}

	var keyDetails = {
	gUserId: gUserId,
	calcTrust: calcTrust,
	ownerTrust: ownerTrust,
	fingerprint: fingerprint,
	showPhoto: showPhoto,
	uidList: uidList,
	subkeyList: subkeyList
	};
	return keyDetails;
	}

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