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mirror of https://github.com/Jermolene/TiddlyWiki5 synced 2024-12-24 17:10:29 +00:00
TiddlyWiki5/core/modules/utils/crypto.js
Jermolene e40a0c07b8 Fix support for upgrading encrypted wikis
Importing an encrypted wiki ordinarily doesn’t place the password in
the password vault on the basis that one ought to be able to import
from a file without automatically inheriting its password.

Now there’s a configuration option that can be used by the upgrade
plugin to cause the password vault to be updated with any password
entered by the user. The end result is that the user only needs to
enter their password once.
2014-07-16 10:06:24 +01:00

95 lines
2.8 KiB
JavaScript

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