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Force JSON request for getting paste data

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rugk 2017-04-11 16:34:13 +02:00
parent ab2e789aee
commit 183ebe518b
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8 changed files with 159 additions and 80 deletions
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208
js/privatebin.js
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@ -42,11 +42,22 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
var Helper = (function () {
var me = {};
/**
* list of UserAgents (parts) known to belong to a bot
*
* @private
* @enum {Object}
* @readonly
*/
var BadBotUA = [
'Bot',
'bot'
];
/**
* character to HTML entity lookup table
*
* @see {@link https://github.com/janl/mustache.js/blob/master/mustache.js#L60}
* @name Helper.entityMap
* @private
* @enum {Object}
* @readonly
@ -160,7 +171,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
* URLs to handle:
* <pre>
* magnet:?xt.1=urn:sha1:YNCKHTQCWBTRNJIV4WNAE52SJUQCZO5C&xt.2=urn:sha1:TXGCZQTH26NL6OUQAJJPFALHG2LTGBC7
* http://example.com:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* https://example.com:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* http://user:example.com@localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* </pre>
*
@ -251,7 +262,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
/**
* get the current location (without search or hash part of the URL),
* eg. http://example.com/path/?aaaa#bbbb --> http://example.com/path/
* eg. https://example.com/path/?aaaa#bbbb --> https://example.com/path/
*
* @name Helper.baseUri
* @function
@ -295,6 +306,32 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
baseUri = null;
}
/**
* checks whether this is a bot we dislike
*
* @name Helper.isBadBot
* @function
* @return {bool}
*/
me.isBadBot = function() {
/*
if ($.inArray(navigator.userAgent, BadBotUA) >= 0) {
return true;
}
*/
// check whether a bot user agent part can be found in the current
// user agent
var arrayLength = BadBotUA.length;
for (var i = 0; i < arrayLength; i++) {
if (navigator.userAgent.indexOf(BadBotUA) >= 0) {
return true;
}
}
return false;
}
return me;
})();
@ -689,7 +726,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
var Model = (function () {
var me = {};
var $cipherData,
var pasteData = null,
$templates;
var id = null, symmetricKey = null;
@ -721,32 +758,53 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
}
/**
* check if cipher data was supplied
* returns the paste data (inlduing the cipher data)
*
* @name Model.getCipherData
* @function
* @return boolean
*/
me.hasCipherData = function()
{
return (me.getCipherData().length > 0);
}
/**
* returns the cipher data
*
* @name Model.getCipherData
* @name Model.getPasteData
* @function
* @param {function} callback (optional) Called when data is available
* @param {function} useCache (optional) Whether to use the cache or
* force a data reload. Default: true
* @return string
*/
me.getCipherData = function()
me.getPasteData = function(callback, useCache)
{
return $cipherData.text();
// use cache if possible/allowed
if (useCache !== false && pasteData !== null) {
//execute callback
if (typeof callback === 'function') {
return callback(pasteData);
}
// alternatively just using inline
return pasteData;
}
// reload data
Uploader.prepare();
Uploader.setUrl(Helper.baseUri() + '?' + me.getPasteId());
Uploader.setFailure(function (status, data) {
// revert loading status…
Alert.hideLoading();
TopNav.showViewButtons();
// show error message
Alert.showError(Uploader.parseUploadError(status, data, 'getting paste data'));
})
Uploader.setSuccess(function (status, data) {
pasteData = data;
if (typeof callback === 'function') {
return callback(data);
}
})
Uploader.run();
}
/**
* get the pastes unique identifier from the URL,
* eg. http://example.com/path/?c05354954c49a487#dfdsdgdgdfgdf returns c05354954c49a487
* eg. https://example.com/path/?c05354954c49a487#dfdsdgdgdfgdf returns c05354954c49a487
*
* @name Model.getPasteId
* @function
@ -819,7 +877,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
*/
me.reset = function()
{
$cipherData = $templates = id = symmetricKey = null;
pasteData = $templates = id = symmetricKey = null;
}
/**
@ -832,7 +890,6 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
*/
me.init = function()
{
$cipherData = $('#cipherdata');
$templates = $('#templates');
}
@ -1333,8 +1390,8 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
if (pasteMetaData.burnafterreading) {
// display paste "for your eyes only" if it is deleted
// actually remove paste, before we claim it is deleted
Controller.removePaste(Model.getPasteId(), 'burnafterreading');
// the paste has been deleted when the JSOn with the ciohertext
// has been downloaded
Alert.showRemaining("FOR YOUR EYES ONLY. Don't close this window, this message can't be displayed again.");
$remainingTime.addClass('foryoureyesonly');
@ -1462,7 +1519,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
}
/**
* getthe cached password
* get the cached password
*
* If you do not get a password with this function
* (returns an empty string), use requestPassword.
@ -3572,7 +3629,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
var me = {};
/**
* decrypt data or prompts for password in cvase of failure
* decrypt data or prompts for password in case of failure
*
* @name PasteDecrypter.decryptOrPromptPassword
* @private
@ -3590,18 +3647,23 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
// if it fails, request password
if (plaindata.length === 0 && password.length === 0) {
// try to get cached password first
password = Prompt.getPassword();
// show prompt
Prompt.requestPassword();
// if password is there, re-try
if (password.length === 0) {
password = Prompt.requestPassword();
// if password is there instantly (legacy method), re-try encryption
if (Prompt.getPassword().length !== 0) {
// recursive
// note: an infinite loop is prevented as the previous if
// clause checks whether a password is already set and ignores
// errors when a password has been passed
return decryptOrPromptPassword(key, password, cipherdata);
}
// recursive
// note: an infinite loop is prevented as the previous if
// clause checks whether a password is already set and ignores
// errors when a password has been passed
return decryptOrPromptPassword.apply(key, password, cipherdata);
// if password could not be received yet, the new modal is used,
// which uses asyncronous event-driven methods to get the password.
// Thus, we cannot do anything yet, we need to wait for the user
// input.
return false;
}
// if all tries failed, we can only return an error
@ -3615,7 +3677,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
/**
* decrypt the actual paste text
*
* @name PasteDecrypter.decryptOrPromptPassword
* @name PasteDecrypter.decryptPaste
* @private
* @function
* @param {object} paste - paste data in object form
@ -3627,7 +3689,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
*/
function decryptPaste(paste, key, password, ignoreError)
{
var plaintext
var plaintext;
if (ignoreError === true) {
plaintext = CryptTool.decipher(key, password, paste.data);
} else {
@ -3738,7 +3800,9 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
Alert.showLoading('Decrypting paste…', 0, 'cloud-download'); // @TODO icon maybe rotation-lock, but needs full Glyphicons
if (typeof paste === 'undefined') {
paste = $.parseJSON(Model.getCipherData());
// get cipher data and wait until it is available
Model.getPasteData(me.run);
return;
}
var key = Model.getPasteKey(),
@ -3761,10 +3825,11 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
// ignore empty paste, as this is allowed when pasting attachments
decryptPaste(paste, key, password, true);
} else {
decryptPaste(paste, key, password);
if (decryptPaste(paste, key, password) === false) {
return false;
}
}
// shows the remaining time (until) deletion
PasteStatus.showRemainingTime(paste.meta);
@ -3844,6 +3909,18 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
Alert.hideLoading();
}
/**
* shows how we much we love bots that execute JS ;)
*
* @name Controller.showBadBotMessage
* @function
*/
me.showBadBotMessage = function()
{
TopNav.hideAllButtons();
Alert.showError('I love you too, bot…');
}
/**
* shows the loaded paste
*
@ -3853,7 +3930,6 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
me.showPaste = function()
{
try {
Model.getPasteId();
Model.getPasteKey();
} catch (err) {
console.error(err);
@ -3882,26 +3958,17 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
// save window position to restore it later
var orgPosition = $(window).scrollTop();
Uploader.prepare();
Uploader.setUrl(Helper.baseUri() + '?' + Model.getPasteId());
Uploader.setFailure(function (status, data) {
// revert loading status…
Alert.hideLoading();
TopNav.showViewButtons();
// show error message
Alert.showError(Uploader.parseUploadError(status, data, 'refresh display'));
})
Uploader.setSuccess(function (status, data) {
PasteDecrypter.run(data);
Model.getPasteData(function (data) {
// restore position
window.scrollTo(0, orgPosition);
PasteDecrypter.run(data);
// NOTE: could create problems as callback may be called
// asyncronously if PasteDecrypter e.g. needs to wait for a
// password being entered
callback();
})
Uploader.run();
}, false); // this false is important as it circumvents the cache
}
/**
@ -3959,6 +4026,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
* @function
* @param {string} pasteId
* @param {string} deleteToken
* @deprecated not used anymore, de we still need it?
*/
me.removePaste = function(pasteId, deleteToken) {
// unfortunately many web servers don't support DELETE (and PUT) out of the box
@ -3968,7 +4036,7 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
Uploader.setUnencryptedData('deletetoken', deleteToken);
Uploader.setFailure(function () {
Controller.showError(I18n._('Could not delete the paste, it was not stored in burn after reading mode.'));
Alert.showError(I18n._('Could not delete the paste, it was not stored in burn after reading mode.'));
})
Uploader.run();
}
@ -4000,13 +4068,23 @@ jQuery.PrivateBin = function($, sjcl, Base64, RawDeflate) {
UiHelper.init();
Uploader.init();
// display an existing paste
if (Model.hasCipherData()) {
return me.showPaste();
// check whether existing paste needs to be shown
try {
Model.getPasteId();
} catch (e) {
// otherwise create a new paste
return me.newPaste();
}
// otherwise create a new paste
me.newPaste();
// prevent bots from viewing a paste and potentially deleting data
// when burn-after-reading is set
// see https://github.com/elrido/ZeroBin/issues/11
if (Helper.isBadBot()) {
return me.showBadBotMessage();
}
//display an existing paste
return me.showPaste();
}
return me;