paste.chapril.org-privatebin/js/zerobin.js
2015-09-03 22:22:59 +02:00

663 lines
22 KiB
JavaScript

/**
* 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 0.20
*/
// Immediately start random number generator collector.
sjcl.random.startCollectors();
/**
* Converts a duration (in seconds) into human readable format.
*
* @param int seconds
* @return string
*/
function secondsToHuman(seconds)
{
if (seconds<60) { var v=Math.floor(seconds); return v+' second'+((v>1)?'s':''); }
if (seconds<60*60) { var v=Math.floor(seconds/60); return v+' minute'+((v>1)?'s':''); }
if (seconds<60*60*24) { var v=Math.floor(seconds/(60*60)); return v+' hour'+((v>1)?'s':''); }
// 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'+((v>1)?'s':''); }
var v=Math.floor(seconds/(60*60*24*30)); return v+' month'+((v>1)?'s':'');
}
/**
* Converts an associative array to an encoded string
* for appending to the anchor.
*
* @param object associative_array Object to be serialized
* @return string
*/
function hashToParameterString(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
*/
function parameterStringToHash(parameterString)
{
var parameterHash = {};
var parameterArray = parameterString.split("&");
for (var i = 0; i < parameterArray.length; i++) {
//var currentParamterString = decodeURIComponent(parameterArray[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
*/
function getParameterHash()
{
var hashIndex = window.location.href.indexOf("#");
if (hashIndex >= 0) {
return parameterStringToHash(window.location.href.substring(hashIndex + 1));
} else {
return {};
}
}
/**
* Compress a message (deflate compression). Returns base64 encoded data.
*
* @param string message
* @return base64 string data
*/
function compress(message) {
return Base64.toBase64( RawDeflate.deflate( Base64.utob(message) ) );
}
/**
* Decompress a message compressed with compress().
*/
function decompress(data) {
return Base64.btou( RawDeflate.inflate( Base64.fromBase64(data) ) );
}
/**
* Compress, then encrypt message with key.
*
* @param string key
* @param string message
* @return encrypted string data
*/
function zeroCipher(key, message) {
if ($('#passwordinput').val().length == 0) {
return sjcl.encrypt(key, compress(message));
}
return sjcl.encrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash($("#passwordinput").val())), compress(message));
}
/**
* Decrypt message with key, then decompress.
*
* @param string key
* @param encrypted string data
* @return string readable message
*/
function zeroDecipher(key, data) {
if (data != undefined) {
try {
return decompress(sjcl.decrypt(key, data));
} catch (err) {
try {
if ($('#passwordinput').val().length > 0) {
password = $('#passwordinput').val();
} else {
password = prompt("Please enter the password for this paste:", "");
if (password == null) return null;
}
data = decompress(sjcl.decrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), data));
$('#passwordinput').val(password);
return data;
} catch (err) {
return zeroDecipher(key, data);
}
}
}
}
/**
* Get the current script location (without search or hash part of the URL).
* eg. http://server.com/zero/?aaaa#bbbb --> http://server.com/zero/
*
* @return string current script location
*/
function scriptLocation() {
var scriptLocation = window.location.href.substring(0,window.location.href.length
- window.location.search.length - window.location.hash.length);
var hashIndex = scriptLocation.indexOf("#");
if (hashIndex !== -1) {
scriptLocation = scriptLocation.substring(0, hashIndex);
}
return scriptLocation;
}
/**
* Get the pastes unique identifier from the URL
* eg. http://server.com/zero/?c05354954c49a487#xxx --> c05354954c49a487
*
* @return string unique identifier
*/
function pasteID() {
return window.location.search.substring(1);
}
/**
* Convert all applicable characters to HTML entities
*
* @param string str
* @returns string encoded string
*/
function htmlEntities(str) {
return String(str).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
}
/**
* Set text of a DOM element (required for IE)
* This is equivalent to element.text(text)
*
* @param object element : a DOM element.
* @param string text : the text to enter.
*/
function setElementText(element, text) {
// For IE<10.
if ($('#oldienotice').is(":visible")) {
// IE<10 does not support white-space:pre-wrap; so we have to do this BIG UGLY STINKING THING.
var html = htmlEntities(text).replace(/\n/ig,"\r\n<br>");
element.html('<pre>'+html+'</pre>');
}
// for other (sane) browsers:
else {
element.text(text);
}
}
/**
* Show decrypted text in the display area, including discussion (if open)
*
* @param string key : decryption key
* @param array comments : Array of messages to display (items = array with keys ('data','meta')
*/
function displayMessages(key, comments) {
try { // Try to decrypt the paste.
var cleartext = zeroDecipher(key, comments[0].data);
if (cleartext == null) throw "password prompt canceled";
} catch(err) {
$('#cleartext').addClass('hidden');
$('#prettymessage').addClass('hidden');
$('#clonebutton').addClass('hidden');
showError('Could not decrypt data (Wrong key ?)');
return;
}
setElementText($('#cleartext'), cleartext);
setElementText($('#prettyprint'), cleartext);
// Convert URLs to clickable links.
urls2links($('#cleartext'));
urls2links($('#prettyprint'));
if (typeof prettyPrint == 'function') prettyPrint();
// Display paste expiration.
if (comments[0].meta.expire_date) $('#remainingtime').removeClass('foryoureyesonly').text('This document will expire in '+secondsToHuman(comments[0].meta.remaining_time)+'.').removeClass('hidden');
if (comments[0].meta.burnafterreading) {
$.get(scriptLocation() + "?pasteid=" + pasteID() + '&deletetoken=burnafterreading', 'json')
.fail(function() {
showError('Could not delete the paste, it was not stored in burn after reading mode.');
});
$('#remainingtime').addClass('foryoureyesonly').text('FOR YOUR EYES ONLY. Don\'t close this window, this message can\'t be displayed again.').removeClass('hidden');
$('#clonebutton').addClass('hidden'); // Discourage cloning (as it can't really be prevented).
}
// If the discussion is opened on this paste, display it.
if (comments[0].meta.opendiscussion) {
$('#comments').html('');
// iterate over comments
for (var i = 1; i < comments.length; i++) {
var comment=comments[i];
var cleartext="[Could not decrypt comment ; Wrong key ?]";
try {
cleartext = zeroDecipher(key, comment.data);
} catch(err) { }
var place = $('#comments');
// If parent comment exists, display below (CSS will automatically shift it right.)
var cname = '#comment_'+comment.meta.parentid;
// If the element exists in page
if ($(cname).length) {
place = $(cname);
}
var divComment = $('<article><div class="comment" id="comment_' + comment.meta.commentid+'">'
+ '<div class="commentmeta"><span class="nickname"></span><span class="commentdate"></span></div><div class="commentdata"></div>'
+ '<button onclick="open_reply($(this),\'' + comment.meta.commentid + '\');return false;" class="btn btn-default">Reply</button>'
+ '</div></article>');
setElementText(divComment.find('div.commentdata'), cleartext);
// Convert URLs to clickable links in comment.
urls2links(divComment.find('div.commentdata'));
divComment.find('span.nickname').html('<i>(Anonymous)</i>');
// Try to get optional nickname:
try {
divComment.find('span.nickname').text(zeroDecipher(key, comment.meta.nickname));
} catch(err) { }
divComment.find('span.commentdate').text(' ('+(new Date(comment.meta.postdate*1000).toString())+')').attr('title','CommentID: ' + comment.meta.commentid);
// If an avatar is available, display it.
if (comment.meta.vizhash) {
divComment.find('span.nickname').before('<img src="' + comment.meta.vizhash + '" class="vizhash" title="Anonymous avatar (Vizhash of the IP address)" /> ');
}
place.append(divComment);
}
$('#comments').append('<div class="comment"><button onclick="open_reply($(this),\'' + pasteID() + '\');return false;" class="btn btn-default">Add comment</button></div>');
$('#discussion').removeClass('hidden');
}
}
/**
* Open the comment entry when clicking the "Reply" button of a comment.
*
* @param object source : element which emitted the event.
* @param string commentid = identifier of the comment we want to reply to.
*/
function open_reply(source, commentid) {
$('div.reply').remove(); // Remove any other reply area.
source.after('<div class="reply">'
+ '<input type="text" id="nickname" class="form-control" title="Optional nickname..." value="Optional nickname..." />'
+ '<textarea id="replymessage" class="replymessage form-control" cols="80" rows="7"></textarea>'
+ '<br /><button id="replybutton" onclick="send_comment(\'' + commentid + '\');return false;" class="btn btn-default">Post comment</button>'
+ '<div id="replystatus"> </div>'
+ '</div>');
$('#nickname').focus(function() {
if ($(this).val() == $(this).attr('title')) {
$(this).val('');
}
});
$('#replymessage').focus();
}
/**
* Send a reply in a discussion.
*
* @param string parentid : the comment identifier we want to send a reply to.
*/
function send_comment(parentid) {
// Do not send if no data.
if ($('#replymessage').val().length==0) {
return;
}
showStatus('Sending comment...', spin=true);
var cipherdata = zeroCipher(pageKey(), $('#replymessage').val());
var ciphernickname = '';
var nick = $('#nickname').val();
if (nick != '' && nick != 'Optional nickname...') {
ciphernickname = zeroCipher(pageKey(), nick);
}
var data_to_send = { data:cipherdata,
parentid: parentid,
pasteid: pasteID(),
nickname: ciphernickname
};
$.post(scriptLocation(), data_to_send, function(data) {
if (data.status == 0) {
showStatus('Comment posted.');
$.get(scriptLocation() + "?" + pasteID() + "&json", function(data) {
if (data.status == 0) {
displayMessages(pageKey(), data.messages);
}
else if (data.status == 1) {
showError('Could not refresh display: ' + data.message);
}
else
{
showError('Could not refresh display: unknown status');
}
}, 'json')
.fail(function() {
showError('Could not refresh display (server error or not responding).');
});
}
else if (data.status == 1) {
showError('Could not post comment: ' + data.message);
}
else
{
showError('Could not post comment: unknown status');
}
}, 'json')
.fail(function() {
showError('Comment could not be sent (server error or not responding).');
});
}
/**
* Send a new paste to server
*/
function send_data() {
// Do not send if no data.
if ($('#message').val().length == 0) {
return;
}
// If sjcl has not collected enough entropy yet, display a message.
if (!sjcl.random.isReady())
{
showStatus('Sending paste (Please move your mouse for more entropy)...', spin=true);
sjcl.random.addEventListener('seeded', function(){ send_data(); });
return;
}
showStatus('Sending paste...', spin=true);
var randomkey = sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0);
var cipherdata = zeroCipher(randomkey, $('#message').val());
var data_to_send = { data: cipherdata,
expire: $('#pasteExpiration').val(),
burnafterreading: $('#burnafterreading').is(':checked') ? 1 : 0,
opendiscussion: $('#opendiscussion').is(':checked') ? 1 : 0
};
$.post(scriptLocation(), data_to_send, function(data) {
if (data.status == 0) {
stateExistingPaste();
var url = scriptLocation() + "?" + data.id + '#' + randomkey;
var deleteUrl = scriptLocation() + "?pasteid=" + data.id + '&deletetoken=' + data.deletetoken;
showStatus('');
$('#pastelink').html('Your paste is <a id="pasteurl" href="' + url + '">' + url + '</a> <span id="copyhint">(Hit CTRL+C to copy)</span>');
$('#deletelink').html('<a href="' + deleteUrl + '">Delete data</a>');
$('#pasteresult').removeClass('hidden');
selectText('pasteurl'); // We pre-select the link so that the user only has to CTRL+C the link.
setElementText($('#cleartext'), $('#message').val());
setElementText($('#prettyprint'), $('#message').val());
// Convert URLs to clickable links.
urls2links($('#cleartext'));
urls2links($('#prettyprint'));
showStatus('');
if (typeof prettyPrint == 'function') prettyPrint();
}
else if (data.status==1) {
showError('Could not create paste: ' + data.message);
}
else {
showError('Could not create paste.');
}
}, 'json')
.fail(function() {
showError('Data could not be sent (server error or not responding).');
});
}
/**
* 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="").
*/
function selectText(element) {
var doc = document
, text = doc.getElementById(element)
, range, selection
;
if (doc.body.createTextRange) { // MS
range = doc.body.createTextRange();
range.moveToElementText(text);
range.select();
} else if (window.getSelection) { // all others
selection = window.getSelection();
range = doc.createRange();
range.selectNodeContents(text);
selection.removeAllRanges();
selection.addRange(range);
}
}
/**
* Put the screen in "New paste" mode.
*/
function stateNewPaste() {
$('#sendbutton').removeClass('hidden');
$('#clonebutton').addClass('hidden');
$('#rawtextbutton').addClass('hidden');
$('#expiration').removeClass('hidden');
$('#remainingtime').addClass('hidden');
$('#burnafterreadingoption').removeClass('hidden');
$('#opendisc').removeClass('hidden');
$('#newbutton').removeClass('hidden');
$('#pasteresult').addClass('hidden');
$('#message').text('');
$('#message').removeClass('hidden');
$('#cleartext').addClass('hidden');
$('#message').focus();
$('#discussion').addClass('hidden');
$('#prettymessage').addClass('hidden');
// Show password field
$('#password').removeClass('hidden');
}
/**
* Put the screen in "Existing paste" mode.
*/
function stateExistingPaste() {
$('#sendbutton').addClass('hidden');
// No "clone" for IE<10.
if ($('#oldienotice').is(":visible")) {
$('#clonebutton').addClass('hidden');
}
else {
$('#clonebutton').removeClass('hidden');
}
$('#rawtextbutton').removeClass('hidden');
$('#expiration').addClass('hidden');
$('#burnafterreadingoption').addClass('hidden');
$('#opendisc').addClass('hidden');
$('#newbutton').removeClass('hidden');
$('#pasteresult').addClass('hidden');
$('#message').addClass('hidden');
$('#cleartext').addClass('hidden');
$('#prettymessage').removeClass('hidden');
}
/**
* Return raw text
*/
function rawText()
{
var paste = $('#cleartext').html();
var newDoc = document.open('text/html', 'replace');
newDoc.write('<pre>'+paste+'</pre>');
newDoc.close();
}
/**
* Clone the current paste.
*/
function clonePaste() {
stateNewPaste();
//Erase the id and the key in url
history.replaceState(document.title, document.title, scriptLocation());
showStatus('');
$('#message').text($('#cleartext').text());
}
/**
* Create a new paste.
*/
function newPaste() {
stateNewPaste();
showStatus('');
$('#message').text('');
}
/**
* Display an error message
* (We use the same function for paste and reply to comments)
*/
function showError(message) {
if ($('#status').length) {
$('#status').addClass('errorMessage').text(message);
} else {
$('#errormessage').removeClass('hidden').append(message);
}
$('#replystatus').addClass('errorMessage').text(message);
}
/**
* Display status
* (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.
*/
function showStatus(message, spin) {
$('#replystatus').removeClass('errorMessage');
$('#replystatus').text(message);
if (!message) {
$('#status').html(' ');
return;
}
if (message == '') {
$('#status').html(' ');
return;
}
$('#status').removeClass('errorMessage');
$('#status').text(message);
if (spin) {
var img = '<img src="img/busy.gif" style="width:16px;height:9px;margin:0px 4px 0px 0px;" />';
$('#status').prepend(img);
$('#replystatus').prepend(img);
}
}
/**
* Convert URLs to clickable links.
* URLs to handle:
* <code>
* 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=
* </code>
*
* @param object element : a jQuery DOM element.
*/
function urls2links(element) {
var re = /((http|https|ftp):\/\/[\w?=&.\/-;#@~%+-]+(?![\w\s?&.\/;#~%"=-]*>))/ig;
element.html(element.html().replace(re,'<a href="$1" rel="nofollow">$1</a>'));
var re = /((magnet):[\w?=&.\/-;#@~%+-]+)/ig;
element.html(element.html().replace(re,'<a href="$1">$1</a>'));
}
/**
* Return the deciphering key stored in anchor part of the URL
*/
function pageKey() {
var key = window.location.hash.substring(1); // Get key
// Some stupid web 2.0 services and redirectors add data AFTER the anchor
// (such as &utm_source=...).
// We will strip any additional data.
// First, strip everything after the equal sign (=) which signals end of base64 string.
i = key.indexOf('='); 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;
}
/**
* main application start, called when DOM is fully loaded
*/
$(function() {
// hide "no javascript" message
$('#noscript').hide();
// If "burn after reading" is checked, disable discussion.
$('#burnafterreading').change(function() {
if ($(this).is(':checked') ) {
$('#opendisc').addClass('buttondisabled');
$('#opendiscussion').attr({checked: false});
$('#opendiscussion').attr('disabled',true);
}
else {
$('#opendisc').removeClass('buttondisabled');
$('#opendiscussion').removeAttr('disabled');
}
});
// Display status returned by php code if any (eg. Paste was properly deleted.)
if ($('#status').text().length > 0) {
showStatus($('#status').text(),false);
return;
}
$('#status').html(' '); // Keep line height even if content empty.
// Display an existing paste
if ($('#cipherdata').text().length > 1) {
// Missing decryption key in URL ?
if (window.location.hash.length == 0) {
showError('Cannot decrypt paste: Decryption key missing in URL (Did you use a redirector or an URL shortener which strips part of the URL ?)');
return;
}
// List of messages to display
var messages = jQuery.parseJSON($('#cipherdata').text());
// Show proper elements on screen.
stateExistingPaste();
displayMessages(pageKey(), messages);
}
// Display error message from php code.
else if ($('#errormessage').text().length>1) {
showError($('#errormessage').text());
}
// Create a new paste.
else {
newPaste();
}
});