/**
* ZeroBin
*
* a zero-knowledge paste bin
*
* @link http://sebsauvage.net/wiki/doku.php?id=php:zerobin
* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
* @license http://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
* @version 0.22
*/
'use strict';
// Immediately start random number generator collector.
sjcl.random.startCollectors();
$(function() {
/**
* static helper methods
*/
var helper = {
/**
* Converts a duration (in seconds) into human friendly approximation.
*
* @param int seconds
* @return array
*/
secondsToHuman: function(seconds)
{
if (seconds < 60)
{
var v = Math.floor(seconds);
return [v, 'second'];
}
if (seconds < 60 * 60)
{
var v = Math.floor(seconds / 60);
return [v, 'minute'];
}
if (seconds < 60 * 60 * 24)
{
var v = Math.floor(seconds / (60 * 60));
return [v, 'hour'];
}
// If less than 2 months, display in days:
if (seconds < 60 * 60 * 24 * 60)
{
var v = Math.floor(seconds / (60 * 60 * 24));
return [v, 'day'];
}
var v = Math.floor(seconds / (60 * 60 * 24 * 30));
return [v, 'month'];
},
/**
* Converts an associative array to an encoded string
* for appending to the anchor.
*
* @param object associative_array Object to be serialized
* @return string
*/
hashToParameterString: function(associativeArray)
{
var parameterString = '';
for (key in associativeArray)
{
if(parameterString === '')
{
parameterString = encodeURIComponent(key);
parameterString += '=' + encodeURIComponent(associativeArray[key]);
}
else
{
parameterString += '&' + encodeURIComponent(key);
parameterString += '=' + encodeURIComponent(associativeArray[key]);
}
}
// padding for URL shorteners
parameterString += '&p=p';
return parameterString;
},
/**
* Converts a string to an associative array.
*
* @param string parameter_string String containing parameters
* @return object
*/
parameterStringToHash: function(parameterString)
{
var parameterHash = {};
var parameterArray = parameterString.split('&');
for (var i = 0; i < parameterArray.length; i++)
{
var pair = parameterArray[i].split('=');
var key = decodeURIComponent(pair[0]);
var value = decodeURIComponent(pair[1]);
parameterHash[key] = value;
}
return parameterHash;
},
/**
* Get an associative array of the parameters found in the anchor
*
* @return object
*/
getParameterHash: function()
{
var hashIndex = window.location.href.indexOf('#');
if (hashIndex >= 0)
{
return this.parameterStringToHash(window.location.href.substring(hashIndex + 1));
}
else
{
return {};
}
},
/**
* Convert all applicable characters to HTML entities
*
* @param string str
* @return string encoded string
*/
htmlEntities: function(str)
{
return String(str).replace(/&/g, '&').replace(//g, '>').replace(/"/g, '"');
},
/**
* Text range selection.
* From: http://stackoverflow.com/questions/985272/jquery-selecting-text-in-an-element-akin-to-highlighting-with-your-mouse
*
* @param string element : Indentifier of the element to select (id="").
*/
selectText: function(element)
{
var doc = document,
text = doc.getElementById(element),
range,
selection;
// MS
if (doc.body.createTextRange)
{
range = doc.body.createTextRange();
range.moveToElementText(text);
range.select();
}
// all others
else if (window.getSelection)
{
selection = window.getSelection();
range = doc.createRange();
range.selectNodeContents(text);
selection.removeAllRanges();
selection.addRange(range);
}
},
/**
* Set text of a DOM element (required for IE)
* This is equivalent to element.text(text)
*
* @param object element : a DOM element.
* @param string text : the text to enter.
*/
setElementText: function(element, text)
{
// For IE<10: Doesn't support white-space:pre-wrap; so we have to do this...
if ($('#oldienotice').is(':visible')) {
var html = this.htmlEntities(text).replace(/\n/ig,'\r\n
');
element.html('
'+html+''); } // for other (sane) browsers: else { element.text(text); } }, /** * replace last child of element with message * * @param object element : a jQuery wrapped DOM element. * @param string message : the message to append. */ setMessage: function(element, message) { var content = element.contents(); if (content.length > 0) { content[content.length - 1].nodeValue = ' ' + message; } else { this.setElementText(element, message); } }, /** * Convert URLs to clickable links. * URLs to handle: *
* magnet:?xt.1=urn:sha1:YNCKHTQCWBTRNJIV4WNAE52SJUQCZO5C&xt.2=urn:sha1:TXGCZQTH26NL6OUQAJJPFALHG2LTGBC7
* http://localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* http://user:password@localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
*
*
* @param object element : a jQuery DOM element.
*/
urls2links: function(element)
{
var markup = '$1';
element.html(
element.html().replace(
/((http|https|ftp):\/\/[\w?=&.\/-;#@~%+-]+(?![\w\s?&.\/;#~%"=-]*>))/ig,
markup
)
);
element.html(
element.html().replace(
/((magnet):[\w?=&.\/-;#@~%+-]+)/ig,
markup
)
);
},
/**
* minimal sprintf emulation for %s and %d formats
* From: http://stackoverflow.com/questions/610406/javascript-equivalent-to-printf-string-format#4795914
*
* @param string format
* @param mixed args one or multiple parameters injected into format string
* @return string
*/
sprintf: function()
{
var args = arguments;
if (typeof arguments[0] == 'object') args = arguments[0];
var string = args[0],
i = 1;
return string.replace(/%((%)|s|d)/g, function (m) {
// m is the matched format, e.g. %s, %d
var val = null;
if (m[2]) {
val = m[2];
} else {
val = args[i];
// A switch statement so that the formatter can be extended.
switch (m)
{
case '%d':
val = parseFloat(val);
if (isNaN(val)) {
val = 0;
}
break;
// Default is %s
}
++i;
}
return val;
});
},
/**
* get value of cookie, if it was set, empty string otherwise
* From: http://www.w3schools.com/js/js_cookies.asp
*
* @param string cname
* @return string
*/
getCookie: function(cname) {
var name = cname + '=';
var ca = document.cookie.split(';');
for(var i = 0; i < ca.length; ++i) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1);
if (c.indexOf(name) == 0) return c.substring(name.length, c.length);
}
return '';
}
};
/**
* internationalization methods
*/
var i18n = {
/**
* supported languages, minus the built in 'en'
*/
supportedLanguages: ['de', 'fr', 'pl', 'sl'],
/**
* translate a string, alias for translate()
*
* @param string $messageId
* @param mixed args one or multiple parameters injected into placeholders
* @return string
*/
_: function()
{
return this.translate(arguments);
},
/**
* translate a string
*
* @param string $messageId
* @param mixed args one or multiple parameters injected into placeholders
* @return string
*/
translate: function()
{
var args = arguments, messageId, usesPlurals;
if (typeof arguments[0] == 'object') args = arguments[0];
if (usesPlurals = $.isArray(args[0]))
{
// use the first plural form as messageId, otherwise the singular
messageId = (args[0].length > 1 ? args[0][1] : args[0][0]);
}
else
{
messageId = args[0];
}
if (messageId.length == 0) return messageId;
if (!this.translations.hasOwnProperty(messageId))
{
if (this.language != 'en') console.debug(
'Missing translation for: ' + messageId
);
this.translations[messageId] = args[0];
}
if (usesPlurals && $.isArray(this.translations[messageId]))
{
var n = parseInt(args[1] || 1),
key = this.getPluralForm(n),
maxKey = this.translations[messageId].length - 1;
if (key > maxKey) key = maxKey;
args[0] = this.translations[messageId][key];
args[1] = n;
}
else
{
args[0] = this.translations[messageId];
}
return helper.sprintf(args);
},
/**
* per language functions to use to determine the plural form
* From: http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html
*
* @param int number
* @return int array key
*/
getPluralForm: function(n) {
switch (this.language)
{
case 'fr':
return (n > 1 ? 1 : 0);
case 'pl':
return (n == 1 ? 0 : n%10 >= 2 && n %10 <=4 && (n%100 < 10 || n%100 >= 20) ? 1 : 2);
// en, de
default:
return (n != 1 ? 1 : 0);
}
},
/**
* load translations into cache, then execute callback function
*
* @param function callback
*/
loadTranslations: function(callback)
{
var selectedLang = helper.getCookie('lang');
var language = selectedLang.length > 0 ? selectedLang : (navigator.language || navigator.userLanguage).substring(0, 2);
// note that 'en' is built in, so no translation is necessary
if (this.supportedLanguages.indexOf(language) == -1)
{
callback();
}
else
{
$.getJSON('i18n/' + language + '.json', function(data) {
i18n.language = language;
i18n.translations = data;
callback();
});
}
},
/**
* built in language
*/
language: 'en',
/**
* translation cache
*/
translations: {}
}
/**
* filter methods
*/
var filter = {
/**
* Compress a message (deflate compression). Returns base64 encoded data.
*
* @param string message
* @return base64 string data
*/
compress: function(message)
{
return Base64.toBase64( RawDeflate.deflate( Base64.utob(message) ) );
},
/**
* Decompress a message compressed with compress().
*
* @param base64 string data
* @return string message
*/
decompress: function(data)
{
return Base64.btou( RawDeflate.inflate( Base64.fromBase64(data) ) );
},
/**
* Compress, then encrypt message with key.
*
* @param string key
* @param string password
* @param string message
* @return encrypted string data
*/
cipher: function(key, password, message)
{
password = (password || '').trim();
if (password.length == 0)
{
return sjcl.encrypt(key, this.compress(message));
}
return sjcl.encrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), this.compress(message));
},
/**
* Decrypt message with key, then decompress.
*
* @param string key
* @param string password
* @param encrypted string data
* @return string readable message
*/
decipher: function(key, password, data)
{
if (data != undefined)
{
try
{
return this.decompress(sjcl.decrypt(key, data));
}
catch(err)
{
try
{
return this.decompress(sjcl.decrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), data));
}
catch(err)
{}
}
}
return '';
}
};
var zerobin = {
/**
* headers to send in AJAX requests
*/
headers: {'X-Requested-With': 'JSONHttpRequest'},
/**
* Get the current script location (without search or hash part of the URL).
* eg. http://server.com/zero/?aaaa#bbbb --> http://server.com/zero/
*
* @return string current script location
*/
scriptLocation: function()
{
var scriptLocation = window.location.href.substring(0,window.location.href.length
- window.location.search.length - window.location.hash.length),
hashIndex = scriptLocation.indexOf('#');
if (hashIndex !== -1)
{
scriptLocation = scriptLocation.substring(0, hashIndex);
}
return scriptLocation;
},
/**
* Get the pastes unique identifier from the URL
* eg. http://server.com/zero/?c05354954c49a487#xxx --> c05354954c49a487
*
* @return string unique identifier
*/
pasteID: function()
{
return window.location.search.substring(1);
},
/**
* Return the deciphering key stored in anchor part of the URL
*
* @return string key
*/
pageKey: function()
{
// Some web 2.0 services and redirectors add data AFTER the anchor
// (such as &utm_source=...). We will strip any additional data.
var key = window.location.hash.substring(1), // Get key
i = key.indexOf('=');
// First, strip everything after the equal sign (=) which signals end of base64 string.
if (i > -1) key = key.substring(0, i + 1);
// If the equal sign was not present, some parameters may remain:
i = key.indexOf('&');
if (i > -1) key = key.substring(0, i);
// Then add trailing equal sign if it's missing
if (key.charAt(key.length - 1) !== '=') key += '=';
return key;
},
/**
* ask the user for the password and return it
*
* @throws error when dialog canceled
* @return string password
*/
requestPassword: function()
{
var password = prompt(i18n._('Please enter the password for this paste:'), '');
if (password == null) throw 'password prompt canceled';
if (password.length == 0) return this.requestPassword();
return password;
},
/**
* use given format on paste, defaults to plain text
*
* @param string format
*/
formatPaste: function(format)
{
switch (format || 'plaintext')
{
case 'markdown':
if (typeof Showdown == 'object')
{
var converter = new Showdown.converter();
this.clearText.html(
converter.makeHtml(this.clearText.html())
);
this.clearText.removeClass('hidden');
}
this.prettyMessage.addClass('hidden');
break;
case 'syntaxhighlighting':
if (typeof prettyPrint == 'function') prettyPrint();
default:
// Convert URLs to clickable links.
helper.urls2links(this.clearText);
helper.urls2links(this.prettyPrint);
this.clearText.addClass('hidden');
if (format == 'plaintext')
{
this.prettyPrint.css('white-space', 'pre-wrap');
this.prettyPrint.css('word-break', 'normal');
this.prettyPrint.removeClass('prettyprint');
}
this.prettyMessage.removeClass('hidden');
}
},
/**
* Show decrypted text in the display area, including discussion (if open)
*
* @param string key : decryption key
* @param object paste : paste object including comments to display (items = array with keys ('data','meta')
*/
displayMessages: function(key, paste)
{
// Try to decrypt the paste.
var password = this.passwordInput.val();
if (!this.prettyPrint.hasClass('prettyprinted')) {
try
{
if (paste.attachment)
{
var attachment = filter.decipher(key, password, paste.attachment);
if (attachment.length == 0)
{
if (password.length == 0) password = this.requestPassword();
attachment = filter.decipher(key, password, paste.attachment);
}
if (attachment.length == 0) throw 'failed to decipher attachment';
if (paste.attachmentname)
{
var attachmentname = filter.decipher(key, password, paste.attachmentname);
if (attachmentname.length > 0) this.attachmentLink.attr('download', attachmentname);
}
this.attachmentLink.attr('href', attachment);
this.attachment.removeClass('hidden');
// if the attachment is an image, display it
var imagePrefix = 'data:image/';
if (attachment.substring(0, imagePrefix.length) == imagePrefix)
{
this.image.html(
$(document.createElement('img'))
.attr('src', attachment)
.attr('class', 'img-thumbnail')
);
this.image.removeClass('hidden');
}
}
var cleartext = filter.decipher(key, password, paste.data);
if (cleartext.length == 0 && password.length == 0 && !paste.attachment)
{
password = this.requestPassword();
cleartext = filter.decipher(key, password, paste.data);
}
if (cleartext.length == 0 && !paste.attachment) throw 'failed to decipher message';
this.passwordInput.val(password);
if (cleartext.length > 0)
{
helper.setElementText(this.clearText, cleartext);
helper.setElementText(this.prettyPrint, cleartext);
this.formatPaste(paste.meta.formatter);
}
}
catch(err)
{
this.clearText.addClass('hidden');
this.prettyMessage.addClass('hidden');
this.cloneButton.addClass('hidden');
this.showError(i18n._('Could not decrypt data (Wrong key?)'));
return;
}
}
// Display paste expiration / for your eyes only.
if (paste.meta.expire_date)
{
var expiration = helper.secondsToHuman(paste.meta.remaining_time),
expirationLabel = [
'This document will expire in %d ' + expiration[1] + '.',
'This document will expire in %d ' + expiration[1] + 's.'
];
helper.setMessage(this.remainingTime, i18n._(expirationLabel, expiration[0]));
this.remainingTime.removeClass('foryoureyesonly')
.removeClass('hidden');
}
if (paste.meta.burnafterreading)
{
// unfortunately many web servers don't support DELETE (and PUT) out of the box
$.ajax({
type: 'POST',
url: this.scriptLocation() + '?' + this.pasteID(),
data: {deletetoken: 'burnafterreading'},
dataType: 'json',
headers: this.headers
})
.fail(function() {
zerobin.showError(i18n._('Could not delete the paste, it was not stored in burn after reading mode.'));
});
helper.setMessage(this.remainingTime, i18n._(
'FOR YOUR EYES ONLY. Don\'t close this window, this message can\'t be displayed again.'
));
this.remainingTime.addClass('foryoureyesonly')
.removeClass('hidden');
// Discourage cloning (as it can't really be prevented).
this.cloneButton.addClass('hidden');
}
// If the discussion is opened on this paste, display it.
if (paste.meta.opendiscussion)
{
this.comments.html('');
// iterate over comments
for (var i = 0; i < paste.comments.length; ++i)
{
var place = this.comments;
var comment = paste.comments[i];
var cleartext = '[' + i18n._('Could not decrypt comment; Wrong key?') + ']';
try
{
cleartext = filter.decipher(key, password, comment.data);
}
catch(err)
{}
// If parent comment exists, display below (CSS will automatically shift it right.)
var cname = '#comment_' + comment.parentid;
// If the element exists in page
if ($(cname).length)
{
place = $(cname);
}
var divComment = $('' + paste + ''); newDoc.close(); }, /** * Clone the current paste. * * @param Event event */ clonePaste: function(event) { event.preventDefault(); this.stateNewPaste(); // Erase the id and the key in url history.replaceState(document.title, document.title, this.scriptLocation()); this.showStatus('', false); if (this.attachmentLink.attr('href')) { this.clonedFile.removeClass('hidden'); this.fileWrap.addClass('hidden'); } this.message.text(this.clearText.text()); $('.navbar-toggle').click(); }, /** * Support input of tab character. * * @param Event event */ supportTabs: function(event) { var keyCode = event.keyCode || event.which; // tab was pressed if (keyCode === 9) { // prevent the textarea to lose focus event.preventDefault(); // get caret position & selection var val = this.value, start = this.selectionStart, end = this.selectionEnd; // set textarea value to: text before caret + tab + text after caret this.value = val.substring(0, start) + '\t' + val.substring(end); // put caret at right position again this.selectionStart = this.selectionEnd = start + 1; } }, /** * Create a new paste. */ newPaste: function() { this.stateNewPaste(); this.showStatus('', false); this.message.text(''); }, /** * Removes an attachment. */ removeAttachment: function() { this.clonedFile.addClass('hidden'); // removes the saved decrypted file data this.attachmentLink.attr('href', ''); // the only way to deselect the file is to recreate the input this.fileWrap.html(this.fileWrap.html()); this.fileWrap.removeClass('hidden'); }, /** * Display an error message * (We use the same function for paste and reply to comments) * * @param string message : text to display */ showError: function(message) { if (this.status.length) { this.status.addClass('errorMessage').text(message); } else { this.errorMessage.removeClass('hidden'); helper.setMessage(this.errorMessage, message); } this.replyStatus.addClass('errorMessage').text(message); }, /** * Display a status message * (We use the same function for paste and reply to comments) * * @param string message : text to display * @param boolean spin (optional) : tell if the "spinning" animation should be displayed. */ showStatus: function(message, spin) { this.replyStatus.removeClass('errorMessage').text(message); if (!message) { this.status.html(' '); return; } if (message == '') { this.status.html(' '); return; } this.status.removeClass('errorMessage').text(message); if (spin) { var img = '