PrivateBin/js/zerobin.js

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/**
* ZeroBin 0.15
*
* @link http://sebsauvage.net/wiki/doku.php?id=php:zerobin
* @author sebsauvage
*/
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// Immediately start random number generator collector.
sjcl.random.startCollectors();
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/**
* Converts a duration (in seconds) into human readable format.
*
* @param int seconds
* @return string
*/
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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':'');
}
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/**
* 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) ) );
}
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/**
* 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) {
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return sjcl.encrypt(key,compress(message));
}
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/**
* Decrypt message with key, then decompress.
*
* @param key
* @param encrypted string data
* @return string readable message
*/
function zeroDecipher(key, data) {
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return decompress(sjcl.decrypt(key,data));
}
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/**
* @return the current script location (without search or hash part of the URL).
* eg. http://server.com/zero/?aaaa#bbbb --> http://server.com/zero/
*/
function scriptLocation() {
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return window.location.href.substring(0,window.location.href.length
-window.location.search.length -window.location.hash.length);
}
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/**
* @return the paste unique identifier from the URL
* eg. 'c05354954c49a487'
*/
function pasteID() {
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return window.location.search.substring(1);
}
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/**
* 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 ($('div#oldienotice').is(":visible")) {
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// IE<10 do not support white-space:pre-wrap; so we have to do this BIG UGLY STINKING THING.
element.text(text.replace(/\n/ig,'{BIG_UGLY_STINKING_THING__OH_GOD_I_HATE_IE}'));
element.html(element.text().replace(/{BIG_UGLY_STINKING_THING__OH_GOD_I_HATE_IE}/ig,"\r\n<br>"));
}
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// for other (sane) browsers:
else {
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element.text(text);
}
}
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/**
* 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) {
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try { // Try to decrypt the paste.
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var cleartext = zeroDecipher(key, comments[0].data);
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} catch(err) {
$('div#cleartext').hide();
$('button#clonebutton').hide();
showError('Could not decrypt data (Wrong key ?)');
return;
}
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setElementText($('div#cleartext'), cleartext);
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urls2links($('div#cleartext')); // Convert URLs to clickable links.
// Display paste expiration.
if (comments[0].meta.expire_date) $('div#remainingtime').removeClass('foryoureyesonly').text('This document will expire in '+secondsToHuman(comments[0].meta.remaining_time)+'.').show();
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if (comments[0].meta.burnafterreading) {
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$('div#remainingtime').addClass('foryoureyesonly').text('FOR YOUR EYES ONLY. Don\'t close this window, this message can\'t be displayed again.').show();
$('button#clonebutton').hide(); // Discourage cloning (as it can't really be prevented).
}
// If the discussion is opened on this paste, display it.
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if (comments[0].meta.opendiscussion) {
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$('div#comments').html('');
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// For each comment.
for (var i = 1; i < comments.length; i++) {
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var comment=comments[i];
var cleartext="[Could not decrypt comment ; Wrong key ?]";
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try {
cleartext = zeroDecipher(key, comment.data);
} catch(err) { }
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var place = $('div#comments');
// If parent comment exists, display below (CSS will automatically shift it right.)
var cname = 'div#comment_'+comment.meta.parentid
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// If the element exists in page
if ($(cname).length) {
place = $(cname);
}
var divComment = $('<div class="comment" id="comment_' + comment.meta.commentid+'">'
+ '<div class="commentmeta"><span class="nickname"></span><span class="commentdate"></span></div><div class="commentdata"></div>'
+ '<button onclick="open_reply($(this),\'' + comment.meta.commentid + '\');return false;">Reply</button>'
+ '</div>');
setElementText(divComment.find('div.commentdata'), cleartext);
// Convert URLs to clickable links in comment.
urls2links(divComment.find('div.commentdata'));
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divComment.find('span.nickname').html('<i>(Anonymous)</i>');
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// Try to get optional nickname:
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try {
divComment.find('span.nickname').text(zeroDecipher(key, comment.meta.nickname));
} catch(err) { }
divComment.find('span.commentdate').text(' ('+(new Date(comment.meta.postdate*1000).toUTCString())+')').attr('title','CommentID: ' + comment.meta.commentid);
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// If an avatar is available, display it.
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if (comment.meta.vizhash) {
divComment.find('span.nickname').before('<img src="' + comment.meta.vizhash + '" class="vizhash" title="Anonymous avatar (Vizhash of the IP address)" />');
}
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place.append(divComment);
}
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$('div#comments').append('<div class="comment"><button onclick="open_reply($(this),\'' + pasteID() + '\');return false;">Add comment</button></div>');
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$('div#discussion').show();
}
}
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/**
* Open the comment entry when clicking the "Reply" button of a comment.
* @param object source : element which emitted the event.
* @param string commentid = identifier of the comment we want to reply to.
*/
function open_reply(source, commentid) {
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$('div.reply').remove(); // Remove any other reply area.
source.after('<div class="reply">'
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+ '<input type="text" id="nickname" title="Optional nickname..." value="Optional nickname..." />'
+ '<textarea id="replymessage" class="replymessage" cols="80" rows="7"></textarea>'
+ '<br><button id="replybutton" onclick="send_comment(\'' + commentid + '\');return false;">Post comment</button>'
+ '<div id="replystatus">&nbsp;</div>'
+ '</div>');
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$('input#nickname').focus(function() {
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$(this).css('color', '#000');
if ($(this).val() == $(this).attr('title')) {
$(this).val('');
}
});
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$('textarea#replymessage').focus();
}
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/**
* 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 ($('textarea#replymessage').val().length==0) {
return;
}
showStatus('Sending comment...', spin=true);
var cipherdata = zeroCipher(pageKey(), $('textarea#replymessage').val());
var ciphernickname = '';
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var nick=$('input#nickname').val();
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if (nick != '' && nick != 'Optional nickname...') {
ciphernickname = zeroCipher(pageKey(), nick);
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}
var data_to_send = { data:cipherdata,
parentid: parentid,
pasteid: pasteID(),
nickname: ciphernickname
};
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$.post(scriptLocation(), data_to_send, 'json')
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.error(function() {
showError('Comment could not be sent (serveur error or not responding).');
})
.success(function(data) {
if (data.status == 0) {
showStatus('Comment posted.');
location.reload();
}
else if (data.status==1) {
showError('Could not post comment: '+data.message);
}
else {
showError('Could not post comment.');
}
});
}
/**
* Send a new paste to server
*/
function send_data() {
// Do not send if no data.
if ($('textarea#message').val().length == 0) {
return;
}
showStatus('Sending paste...', spin=true);
var randomkey = sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0);
var cipherdata = zeroCipher(randomkey, $('textarea#message').val());
var data_to_send = { data: cipherdata,
expire: $('select#pasteExpiration').val(),
opendiscussion: $('input#opendiscussion').is(':checked') ? 1 : 0
};
$.post(scriptLocation(), data_to_send, 'json')
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.error(function() {
showError('Data could not be sent (serveur error or not responding).');
})
.success(function(data) {
if (data.status == 0) {
stateExistingPaste();
var url = scriptLocation() + "?" + data.id + '#' + randomkey;
showStatus('');
$('div#pastelink').html('Your paste is <a href="' + url + '">' + url + '</a>');
$('div#pastelink')
.append('&nbsp;&nbsp;<button id="shortenbutton" onclick="document.location=\'' + shortenUrl(url) + '\'"><img src="lib/icon_shorten.png" width="13" height="15" />Shorten URL</button>')
.show();
setElementText($('div#cleartext'), $('textarea#message').val());
urls2links($('div#cleartext'));
showStatus('');
}
else if (data.status==1) {
showError('Could not create paste: '+data.message);
}
else {
showError('Could not create paste.');
}
});
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}
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/**
* Put the screen in "New paste" mode.
*/
function stateNewPaste() {
$('button#sendbutton').show();
$('button#clonebutton').hide();
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$('div#expiration').show();
$('div#remainingtime').hide();
$('div#language').hide(); // $('#language').show();
$('input#password').hide(); //$('#password').show();
$('div#opendisc').show();
$('button#newbutton').show();
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$('div#pastelink').hide();
$('textarea#message').text('');
$('textarea#message').show();
$('div#cleartext').hide();
$('div#message').focus();
$('div#discussion').hide();
}
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/**
* Put the screen in "Existing paste" mode.
*/
function stateExistingPaste() {
$('button#sendbutton').hide();
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// No "clone" for IE<10.
if ($('div#oldienotice').is(":visible")) {
$('button#clonebutton').hide();
}
else {
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$('button#clonebutton').show();
}
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$('div#expiration').hide();
$('div#language').hide();
$('input#password').hide();
$('div#opendisc').hide();
$('button#newbutton').show();
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$('div#pastelink').hide();
$('textarea#message').hide();
$('div#cleartext').show();
}
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/**
* Clone the current paste.
*/
function clonePaste() {
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stateNewPaste();
showStatus('');
$('textarea#message').text($('div#cleartext').text());
}
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/**
* Create a new paste.
*/
function newPaste() {
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stateNewPaste();
showStatus('');
$('textarea#message').text('');
}
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/**
* Display an error message
* (We use the same function for paste and reply to comments)
*/
function showError(message) {
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$('div#status').addClass('errorMessage').text(message);
$('div#replystatus').addClass('errorMessage').text(message);
}
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/**
* Display status
* (We use the same function for paste and reply to comments)
*
* @param string message : text to display
* @param boolean spin (optional) : tell if the "spinning" animation should be displayed.
*/
function showStatus(message, spin) {
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$('div#replystatus').removeClass('errorMessage');
$('div#replystatus').text(message);
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if (!message) {
$('div#status').html('&nbsp');
return;
}
if (message == '') {
$('div#status').html('&nbsp');
return;
}
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$('div#status').removeClass('errorMessage');
$('div#status').text(message);
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if (spin) {
var img = '<img src="img/busy.gif" style="width:16px;height:9px;margin:0px 4px 0px 0px;" />';
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$('div#status').prepend(img);
$('div#replystatus').prepend(img);
}
}
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/**
* Generate link to URL shortener.
*/
function shortenUrl(url) {
return 'http://snipurl.com/site/snip?link=' + encodeURIComponent(url);
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}
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/**
* 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.
* @FIXME: add ppa & apt links.
*/
function urls2links(element) {
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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">$1</a>'));
}
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/**
* Return the deciphering key stored in anchor part of the URL
*/
function pageKey() {
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var key = window.location.hash.substring(1); // Get key
// Some stupid web 2.0 services and redirectors add data AFTER the anchor
// (such as &utm_source=...).
// We will strip any additional data.
// First, strip everything after the equal sign (=) which signals end of base64 string.
i = key.indexOf('='); if (i>-1) { key = key.substring(0,i+1); }
// If the equal sign was not present, some parameters may remain:
i = key.indexOf('&'); if (i>-1) { key = key.substring(0,i); }
// Then add trailing equal sign if it's missing
if (key.charAt(key.length-1)!=='=') key+='=';
return key;
}
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$(function() {
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$('select#pasteExpiration').change(function() {
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if ($(this).val() == 'burn') {
$('div#opendisc').addClass('buttondisabled');
$('input#opendiscussion').attr('disabled',true);
}
else {
$('div#opendisc').removeClass('buttondisabled');
$('input#opendiscussion').removeAttr('disabled');
}
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});
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// Display an existing paste
if ($('div#cipherdata').text().length > 1) {
// Missing decryption key in URL ?
if (window.location.hash.length == 0) {
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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;
}
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// List of messages to display
var messages = jQuery.parseJSON($('div#cipherdata').text());
// Show proper elements on screen.
stateExistingPaste();
displayMessages(pageKey(), messages);
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}
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// Display error message from php code.
else if ($('div#errormessage').text().length>1) {
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showError($('div#errormessage').text());
}
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// Create a new paste.
else {
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newPaste();
}
});