95 lines
2.8 KiB
JavaScript
95 lines
2.8 KiB
JavaScript
/*\
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title: $:/core/modules/utils/crypto.js
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type: application/javascript
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module-type: utils
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Utility functions related to crypto.
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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Look for an encrypted store area in the text of a TiddlyWiki file
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*/
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exports.extractEncryptedStoreArea = function(text) {
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var encryptedStoreAreaStartMarker = "<pre id=\"encryptedStoreArea\" type=\"text/plain\" style=\"display:none;\">",
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encryptedStoreAreaStart = text.indexOf(encryptedStoreAreaStartMarker);
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if(encryptedStoreAreaStart !== -1) {
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var encryptedStoreAreaEnd = text.indexOf("</pre>",encryptedStoreAreaStart);
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if(encryptedStoreAreaEnd !== -1) {
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return $tw.utils.htmlDecode(text.substring(encryptedStoreAreaStart + encryptedStoreAreaStartMarker.length,encryptedStoreAreaEnd));
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}
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}
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return null;
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};
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/*
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Attempt to extract the tiddlers from an encrypted store area using the current password. If the password is not provided then the password in the password store will be used
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*/
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exports.decryptStoreArea = function(encryptedStoreArea,password) {
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var decryptedText = $tw.crypto.decrypt(encryptedStoreArea,password);
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if(decryptedText) {
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var json = $tw.utils.parseJSONSafe(decryptedText),
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tiddlers = [];
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for(var title in json) {
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if(title !== "$:/isEncrypted") {
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tiddlers.push(json[title]);
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}
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}
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return tiddlers;
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} else {
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return null;
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}
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};
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/*
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Attempt to extract the tiddlers from an encrypted store area using the current password. If that fails, the user is prompted for a password.
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encryptedStoreArea: text of the TiddlyWiki encrypted store area
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callback: function(tiddlers) called with the array of decrypted tiddlers
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The following configuration settings are supported:
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$tw.config.usePasswordVault: causes any password entered by the user to also be put into the system password vault
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*/
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exports.decryptStoreAreaInteractive = function(encryptedStoreArea,callback,options) {
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// Try to decrypt with the current password
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var tiddlers = $tw.utils.decryptStoreArea(encryptedStoreArea);
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if(tiddlers) {
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callback(tiddlers);
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} else {
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// Prompt for a new password and keep trying
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$tw.passwordPrompt.createPrompt({
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serviceName: "Enter a password to decrypt the imported TiddlyWiki",
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noUserName: true,
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canCancel: true,
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submitText: "Decrypt",
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callback: function(data) {
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// Exit if the user cancelled
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if(!data) {
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return false;
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}
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// Attempt to decrypt the tiddlers
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var tiddlers = $tw.utils.decryptStoreArea(encryptedStoreArea,data.password);
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if(tiddlers) {
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if($tw.config.usePasswordVault) {
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$tw.crypto.setPassword(data.password);
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}
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callback(tiddlers);
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// Exit and remove the password prompt
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return true;
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} else {
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// We didn't decrypt everything, so continue to prompt for password
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return false;
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}
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}
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});
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}
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};
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})();
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