/** * PrivateBin * * a zero-knowledge paste bin * * @see {@link https://github.com/PrivateBin/PrivateBin} * @copyright 2012 Sébastien SAUVAGE ({@link http://sebsauvage.net}) * @license {@link https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License} * @version 1.7.1 * @name PrivateBin * @namespace */ // global Base64, DOMPurify, FileReader, RawDeflate, history, navigator, prettyPrint, prettyPrintOne, showdown, kjua jQuery.fn.draghover = function() { 'use strict'; return this.each(function() { let collection = $(), self = $(this); self.on('dragenter', function(e) { if (collection.length === 0) { self.trigger('draghoverstart'); } collection = collection.add(e.target); }); self.on('dragleave drop', function(e) { collection = collection.not(e.target); if (collection.length === 0) { self.trigger('draghoverend'); } }); }); }; // main application start, called when DOM is fully loaded jQuery(document).ready(function() { 'use strict'; // run main controller $.PrivateBin.Controller.init(); }); jQuery.PrivateBin = (function($, RawDeflate) { 'use strict'; /** * zlib library interface * * @private */ let z; /** * DOMpurify settings for HTML content * * @private */ const purifyHtmlConfig = { ALLOWED_URI_REGEXP: /^(?:(?:(?:f|ht)tps?|mailto|magnet):)/i, SAFE_FOR_JQUERY: true, USE_PROFILES: { html: true } }; /** * DOMpurify settings for SVG content * * @private */ const purifySvgConfig = { USE_PROFILES: { svg: true, svgFilters: true } }; /** * URL fragment prefix requiring load confirmation * * @private */ const loadConfirmPrefix = '#-'; /** * CryptoData class * * bundles helper functions used in both paste and comment formats * * @name CryptoData * @class */ function CryptoData(data) { this.v = 1; // store all keys in the default locations for drop-in replacement for (let key in data) { this[key] = data[key]; } /** * gets the cipher data (cipher text + adata) * * @name CryptoData.getCipherData * @function * @return {Array}|{string} */ this.getCipherData = function() { return this.v === 1 ? this.data : [this.ct, this.adata]; } } /** * Paste class * * bundles helper functions around the paste formats * * @name Paste * @class */ function Paste(data) { // inherit constructor and methods of CryptoData CryptoData.call(this, data); /** * gets the used formatter * * @name Paste.getFormat * @function * @return {string} */ this.getFormat = function() { return this.v === 1 ? this.meta.formatter : this.adata[1]; } /** * gets the remaining seconds before the paste expires * * returns 0 if there is no expiration * * @name Paste.getTimeToLive * @function * @return {string} */ this.getTimeToLive = function() { return (this.v === 1 ? this.meta.remaining_time : this.meta.time_to_live) || 0; } /** * is burn-after-reading enabled * * @name Paste.isBurnAfterReadingEnabled * @function * @return {bool} */ this.isBurnAfterReadingEnabled = function() { return (this.v === 1 ? this.meta.burnafterreading : this.adata[3]); } /** * are discussions enabled * * @name Paste.isDiscussionEnabled * @function * @return {bool} */ this.isDiscussionEnabled = function() { return (this.v === 1 ? this.meta.opendiscussion : this.adata[2]); } } /** * Comment class * * bundles helper functions around the comment formats * * @name Comment * @class */ function Comment(data) { // inherit constructor and methods of CryptoData CryptoData.call(this, data); /** * gets the UNIX timestamp of the comment creation * * @name Comment.getCreated * @function * @return {int} */ this.getCreated = function() { return this.meta[this.v === 1 ? 'postdate' : 'created']; } /** * gets the icon of the comment submitter * * @name Comment.getIcon * @function * @return {string} */ this.getIcon = function() { return this.meta[this.v === 1 ? 'vizhash' : 'icon'] || ''; } } /** * static Helper methods * * @name Helper * @class */ const Helper = (function () { const me = {}; /** * 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 */ const entityMap = { '&': '&', '<': '<', '>': '>', '"': '"', '\'': ''', '/': '/', '`': '`', '=': '=' }; /** * number of seconds in a minute * * @name Helper.minute * @private * @enum {number} * @readonly */ const minute = 60; /** * number of seconds in an hour * * = 60 * 60 seconds * * @name Helper.minute * @private * @enum {number} * @readonly */ const hour = 3600; /** * number of seconds in a day * * = 60 * 60 * 24 seconds * * @name Helper.day * @private * @enum {number} * @readonly */ const day = 86400; /** * number of seconds in a week * * = 60 * 60 * 24 * 7 seconds * * @name Helper.week * @private * @enum {number} * @readonly */ const week = 604800; /** * number of seconds in a month (30 days, an approximation) * * = 60 * 60 * 24 * 30 seconds * * @name Helper.month * @private * @enum {number} * @readonly */ const month = 2592000; /** * number of seconds in a non-leap year * * = 60 * 60 * 24 * 365 seconds * * @name Helper.year * @private * @enum {number} * @readonly */ const year = 31536000; /** * cache for script location * * @name Helper.baseUri * @private * @enum {string|null} */ let baseUri = null; /** * converts a duration (in seconds) into human friendly approximation * * @name Helper.secondsToHuman * @function * @param {number} seconds * @return {Array} */ me.secondsToHuman = function(seconds) { let v; if (seconds < minute) { v = Math.floor(seconds); return [v, 'second']; } if (seconds < hour) { v = Math.floor(seconds / minute); return [v, 'minute']; } if (seconds < day) { v = Math.floor(seconds / hour); return [v, 'hour']; } // If less than 2 months, display in days: if (seconds < (2 * month)) { v = Math.floor(seconds / day); return [v, 'day']; } v = Math.floor(seconds / month); return [v, 'month']; }; /** * converts a duration string into seconds * * The string is expected to be optional digits, followed by a time. * Supported times are: min, hour, day, month, year, never * Examples: 5min, 13hour, never * * @name Helper.durationToSeconds * @function * @param {String} duration * @return {number} */ me.durationToSeconds = function(duration) { let pieces = duration.split(/(\D+)/), factor = pieces[0] || 0, timespan = pieces[1] || pieces[0]; switch (timespan) { case 'min': return factor * minute; case 'hour': return factor * hour; case 'day': return factor * day; case 'week': return factor * week; case 'month': return factor * month; case 'year': return factor * year; case 'never': return 0; default: return factor; } }; /** * text range selection * * @see {@link https://stackoverflow.com/questions/985272/jquery-selecting-text-in-an-element-akin-to-highlighting-with-your-mouse} * @name Helper.selectText * @function * @param {HTMLElement} element */ me.selectText = function(element) { let range, selection; // MS if (document.body.createTextRange) { range = document.body.createTextRange(); range.moveToElementText(element); range.select(); } else if (window.getSelection) { selection = window.getSelection(); range = document.createRange(); range.selectNodeContents(element); selection.removeAllRanges(); selection.addRange(range); } }; /** * convert URLs to clickable links in the provided element. * * URLs to handle: *
         *     magnet:?xt.1=urn:sha1:YNCKHTQCWBTRNJIV4WNAE52SJUQCZO5C&xt.2=urn:sha1:TXGCZQTH26NL6OUQAJJPFALHG2LTGBC7
         *     https://example.com:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
         *     http://user:example.com@localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
         * 
* * @name Helper.urls2links * @function * @param {HTMLElement} element */ me.urls2links = function(element) { element.html( DOMPurify.sanitize( element.html().replace( /(((https?|ftp):\/\/[\w?!=&.\/-;#@~%+*-]+(?![\w\s?!&.\/;#~%"=-]>))|((magnet):[\w?=&.\/-;#@~%+*-]+))/ig, '$1' ), purifyHtmlConfig ) ); }; /** * minimal sprintf emulation for %s and %d formats * * Note that this function needs the parameters in the same order as the * format strings appear in the string, contrary to the original. * * @see {@link https://stackoverflow.com/questions/610406/javascript-equivalent-to-printf-string-format#4795914} * @name Helper.sprintf * @function * @param {string} format * @param {...*} args - one or multiple parameters injected into format string * @return {string} */ me.sprintf = function() { const args = Array.prototype.slice.call(arguments); let format = args[0], i = 1; return format.replace(/%(s|d)/g, function (m) { let val = args[i]; if (m === '%d') { val = parseFloat(val); if (isNaN(val)) { val = 0; } } ++i; return val; }); }; /** * get value of cookie, if it was set, empty string otherwise * * @see {@link http://www.w3schools.com/js/js_cookies.asp} * @name Helper.getCookie * @function * @param {string} cname - may not be empty * @return {string} */ me.getCookie = function(cname) { const name = cname + '=', ca = document.cookie.split(';'); for (let i = 0; i < ca.length; ++i) { let c = ca[i]; while (c.charAt(0) === ' ') { c = c.substring(1); } if (c.indexOf(name) === 0) { return c.substring(name.length, c.length); } } return ''; }; /** * get the current location (without search or hash part of the URL), * eg. https://example.com/path/?aaaa#bbbb --> https://example.com/path/ * * @name Helper.baseUri * @function * @return {string} */ me.baseUri = function() { // check for cached version if (baseUri !== null) { return baseUri; } baseUri = window.location.origin + window.location.pathname; return baseUri; }; /** * wrap an object into a Paste, used for mocking in the unit tests * * @name Helper.PasteFactory * @function * @param {object} data * @return {Paste} */ me.PasteFactory = function(data) { return new Paste(data); }; /** * wrap an object into a Comment, used for mocking in the unit tests * * @name Helper.CommentFactory * @function * @param {object} data * @return {Comment} */ me.CommentFactory = function(data) { return new Comment(data); }; /** * convert all applicable characters to HTML entities * * @see {@link https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html} * @name Helper.htmlEntities * @function * @param {string} str * @return {string} escaped HTML */ me.htmlEntities = function(str) { return String(str).replace( /[&<>"'`=\/]/g, function(s) { return entityMap[s]; } ); } /** * calculate expiration date given initial date and expiration period * * @name Helper.calculateExpirationDate * @function * @param {Date} initialDate - may not be empty * @param {string|number} expirationDisplayStringOrSecondsToExpire - may not be empty * @return {Date} */ me.calculateExpirationDate = function(initialDate, expirationDisplayStringOrSecondsToExpire) { let expirationDate = new Date(initialDate), secondsToExpiration = expirationDisplayStringOrSecondsToExpire; if (typeof expirationDisplayStringOrSecondsToExpire === 'string') { secondsToExpiration = me.durationToSeconds(expirationDisplayStringOrSecondsToExpire); } if (typeof secondsToExpiration !== 'number') { throw new Error('Cannot calculate expiration date.'); } if (secondsToExpiration === 0) { return null; } expirationDate = expirationDate.setUTCSeconds(expirationDate.getUTCSeconds() + secondsToExpiration); return expirationDate; }; /** * resets state, used for unit testing * * @name Helper.reset * @function */ me.reset = function() { baseUri = null; }; return me; })(); /** * internationalization module * * @name I18n * @class */ const I18n = (function () { const me = {}; /** * const for string of loaded language * * @name I18n.languageLoadedEvent * @private * @prop {string} * @readonly */ const languageLoadedEvent = 'languageLoaded'; /** * supported languages, minus the built in 'en' * * @name I18n.supportedLanguages * @private * @prop {string[]} * @readonly */ const supportedLanguages = ['ar', 'bg', 'ca', 'co', 'cs', 'de', 'el', 'es', 'et', 'fi', 'fr', 'he', 'hu', 'id', 'it', 'ja', 'jbo', 'lt', 'no', 'nl', 'pl', 'pt', 'oc', 'ro', 'ru', 'sk', 'sl', 'th', 'tr', 'uk', 'zh']; /** * built in language * * @name I18n.language * @private * @prop {string|null} */ let language = null; /** * translation cache * * @name I18n.translations * @private * @enum {Object} */ let translations = {}; /** * translate a string, alias for I18n.translate * * @name I18n._ * @function * @param {jQuery} $element - optional * @param {string} messageId * @param {...*} args - one or multiple parameters injected into placeholders * @return {string} */ me._ = function() { return me.translate.apply(this, arguments); }; /** * translate a string * * Optionally pass a jQuery element as the first parameter, to automatically * let the text of this element be replaced. In case the (asynchronously * loaded) language is not downloaded yet, this will make sure the string * is replaced when it eventually gets loaded. Using this is both simpler * and more secure, as it avoids potential XSS when inserting text. * The next parameter is the message ID, matching the ones found in * the translation files under the i18n directory. * Any additional parameters will get inserted into the message ID in * place of %s (strings) or %d (digits), applying the appropriate plural * in case of digits. See also Helper.sprintf(). * * @name I18n.translate * @function * @param {jQuery} $element - optional * @param {string} messageId * @param {...*} args - one or multiple parameters injected into placeholders * @return {string} */ me.translate = function() { // convert parameters to array let args = Array.prototype.slice.call(arguments), messageId, $element = null; // parse arguments if (args[0] instanceof jQuery) { // optional jQuery element as first parameter $element = args[0]; args.shift(); } // extract messageId from arguments let usesPlurals = $.isArray(args[0]); if (usesPlurals) { // 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 no translation string cannot be found (in translations object) if (!translations.hasOwnProperty(messageId) || language === null) { // if language is still loading and we have an elemt assigned if (language === null && $element !== null) { // handle the error by attaching the language loaded event let orgArguments = arguments; $(document).on(languageLoadedEvent, function () { // re-execute this function me.translate.apply(this, orgArguments); }); // and fall back to English for now until the real language // file is loaded } // for all other languages than English for which this behaviour // is expected as it is built-in, log error if (language !== null && language !== 'en') { console.error('Missing translation for: \'' + messageId + '\' in language ' + language); // fallback to English } // save English translation (should be the same on both sides) translations[messageId] = args[0]; } // lookup plural translation if (usesPlurals && $.isArray(translations[messageId])) { let n = parseInt(args[1] || 1, 10), key = me.getPluralForm(n), maxKey = translations[messageId].length - 1; if (key > maxKey) { key = maxKey; } args[0] = translations[messageId][key]; args[1] = n; } else { // lookup singular translation args[0] = translations[messageId]; } // messageID may contain links, but should be from a trusted source (code or translation JSON files) let containsLinks = args[0].indexOf(' 0) may never contain HTML as they may come from untrusted parties if ((containsLinks ? i > 1 : i > 0) || !containsLinks) { args[i] = Helper.htmlEntities(args[i]); } } } // format string let output = Helper.sprintf.apply(this, args); if (containsLinks) { // only allow tags/attributes we actually use in translations output = DOMPurify.sanitize( output, { ALLOWED_TAGS: ['a', 'i', 'span'], ALLOWED_ATTR: ['href', 'id'] } ); } // if $element is given, insert translation if ($element !== null) { if (containsLinks) { $element.html(output); } else { // text node takes care of entity encoding $element.text(output); } return ''; } return output; }; /** * get currently loaded language * * @name I18n.getLanguage * @function * @return {string} */ me.getLanguage = function() { return language; }; /** * per language functions to use to determine the plural form * * @see {@link https://docs.translatehouse.org/projects/localization-guide/en/latest/l10n/pluralforms.html} * @name I18n.getPluralForm * @function * @param {int} n * @return {int} array key */ me.getPluralForm = function(n) { switch (language) { case 'ar': return n === 0 ? 0 : (n === 1 ? 1 : (n === 2 ? 2 : (n % 100 >= 3 && n % 100 <= 10 ? 3 : (n % 100 >= 11 ? 4 : 5)))); case 'cs': case 'sk': return n === 1 ? 0 : (n >= 2 && n <= 4 ? 1 : 2); case 'co': case 'fr': case 'oc': case 'tr': case 'zh': return n > 1 ? 1 : 0; case 'he': return n === 1 ? 0 : (n === 2 ? 1 : ((n < 0 || n > 10) && (n % 10 === 0) ? 2 : 3)); case 'id': case 'ja': case 'jbo': case 'th': return 0; case 'lt': return n % 10 === 1 && n % 100 !== 11 ? 0 : ((n % 10 >= 2 && n % 100 < 10 || n % 100 >= 20) ? 1 : 2); case 'pl': return n === 1 ? 0 : (n % 10 >= 2 && n %10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2); case 'ro': return n === 1 ? 0 : ((n === 0 || (n % 100 > 0 && n % 100 < 20)) ? 1 : 2); case 'ru': case 'uk': return n % 10 === 1 && n % 100 !== 11 ? 0 : (n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2); case 'sl': return n % 100 === 1 ? 1 : (n % 100 === 2 ? 2 : (n % 100 === 3 || n % 100 === 4 ? 3 : 0)); // bg, ca, de, el, en, es, et, fi, hu, it, nl, no, pt default: return n !== 1 ? 1 : 0; } }; /** * load translations into cache * * @name I18n.loadTranslations * @function */ me.loadTranslations = function() { let newLanguage = Helper.getCookie('lang'); // auto-select language based on browser settings if (newLanguage.length === 0) { newLanguage = (navigator.language || navigator.userLanguage || 'en'); if (newLanguage.indexOf('-') > 0) { newLanguage = newLanguage.split('-')[0]; } } // if language is already used skip update if (newLanguage === language) { return; } // if language is built-in (English) skip update if (newLanguage === 'en') { language = 'en'; return; } // if language is not supported, show error if (supportedLanguages.indexOf(newLanguage) === -1) { console.error('Language \'%s\' is not supported. Translation failed, fallback to English.', newLanguage); language = 'en'; return; } // load strings from JSON $.getJSON('i18n/' + newLanguage + '.json', function(data) { language = newLanguage; translations = data; $(document).triggerHandler(languageLoadedEvent); }).fail(function (data, textStatus, errorMsg) { console.error('Language \'%s\' could not be loaded (%s: %s). Translation failed, fallback to English.', newLanguage, textStatus, errorMsg); language = 'en'; }); }; /** * resets state, used for unit testing * * @name I18n.reset * @function */ me.reset = function(mockLanguage, mockTranslations) { language = mockLanguage || null; translations = mockTranslations || {}; }; return me; })(); /** * handles everything related to en/decryption * * @name CryptTool * @class */ const CryptTool = (function () { const me = {}; /** * base58 encoder & decoder * * @private */ let base58 = new baseX('123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'); /** * convert UTF-8 string stored in a DOMString to a standard UTF-16 DOMString * * Iterates over the bytes of the message, converting them all hexadecimal * percent encoded representations, then URI decodes them all * * @name CryptTool.utf8To16 * @function * @private * @param {string} message UTF-8 string * @return {string} UTF-16 string */ function utf8To16(message) { return decodeURIComponent( message.split('').map( function(character) { return '%' + ('00' + character.charCodeAt(0).toString(16)).slice(-2); } ).join('') ); } /** * convert DOMString (UTF-16) to a UTF-8 string stored in a DOMString * * URI encodes the message, then finds the percent encoded characters * and transforms these hexadecimal representation back into bytes * * @name CryptTool.utf16To8 * @function * @private * @param {string} message UTF-16 string * @return {string} UTF-8 string */ function utf16To8(message) { return encodeURIComponent(message).replace( /%([0-9A-F]{2})/g, function (match, hexCharacter) { return String.fromCharCode('0x' + hexCharacter); } ); } /** * convert ArrayBuffer into a UTF-8 string * * Iterates over the bytes of the array, catenating them into a string * * @name CryptTool.arraybufferToString * @function * @private * @param {ArrayBuffer} messageArray * @return {string} message */ function arraybufferToString(messageArray) { const array = new Uint8Array(messageArray); let message = '', i = 0; while(i < array.length) { message += String.fromCharCode(array[i++]); } return message; } /** * convert UTF-8 string into a Uint8Array * * Iterates over the bytes of the message, writing them to the array * * @name CryptTool.stringToArraybuffer * @function * @private * @param {string} message UTF-8 string * @return {Uint8Array} array */ function stringToArraybuffer(message) { const messageArray = new Uint8Array(message.length); for (let i = 0; i < message.length; ++i) { messageArray[i] = message.charCodeAt(i); } return messageArray; } /** * compress a string (deflate compression), returns buffer * * @name CryptTool.compress * @async * @function * @private * @param {string} message * @param {string} mode * @param {object} zlib * @throws {string} * @return {ArrayBuffer} data */ async function compress(message, mode, zlib) { message = stringToArraybuffer( utf16To8(message) ); if (mode === 'zlib') { if (typeof zlib === 'undefined') { throw 'Error compressing paste, due to missing WebAssembly support.' } return zlib.deflate(message).buffer; } return message; } /** * decompress potentially base64 encoded, deflate compressed buffer, returns string * * @name CryptTool.decompress * @async * @function * @private * @param {ArrayBuffer} data * @param {string} mode * @param {object} zlib * @throws {string} * @return {string} message */ async function decompress(data, mode, zlib) { if (mode === 'zlib' || mode === 'none') { if (mode === 'zlib') { if (typeof zlib === 'undefined') { throw 'Error decompressing paste, due to missing WebAssembly support.' } data = zlib.inflate( new Uint8Array(data) ).buffer; } return utf8To16( arraybufferToString(data) ); } // detect presence of Base64.js, indicating legacy ZeroBin paste if (typeof Base64 === 'undefined') { return utf8To16( RawDeflate.inflate( utf8To16( atob( arraybufferToString(data) ) ) ) ); } else { return Base64.btou( RawDeflate.inflate( Base64.fromBase64( arraybufferToString(data) ) ) ); } } /** * returns specified number of random bytes * * @name CryptTool.getRandomBytes * @function * @private * @param {int} length number of random bytes to fetch * @throws {string} * @return {string} random bytes */ function getRandomBytes(length) { let bytes = ''; const byteArray = new Uint8Array(length); window.crypto.getRandomValues(byteArray); for (let i = 0; i < length; ++i) { bytes += String.fromCharCode(byteArray[i]); } return bytes; } /** * derive cryptographic key from key string and password * * @name CryptTool.deriveKey * @async * @function * @private * @param {string} key * @param {string} password * @param {array} spec cryptographic specification * @return {CryptoKey} derived key */ async function deriveKey(key, password, spec) { let keyArray = stringToArraybuffer(key); if (password.length > 0) { // version 1 pastes did append the passwords SHA-256 hash in hex if (spec[7] === 'rawdeflate') { let passwordBuffer = await window.crypto.subtle.digest( {name: 'SHA-256'}, stringToArraybuffer( utf16To8(password) ) ).catch(Alert.showError); password = Array.prototype.map.call( new Uint8Array(passwordBuffer), x => ('00' + x.toString(16)).slice(-2) ).join(''); } let passwordArray = stringToArraybuffer(password), newKeyArray = new Uint8Array(keyArray.length + passwordArray.length); newKeyArray.set(keyArray, 0); newKeyArray.set(passwordArray, keyArray.length); keyArray = newKeyArray; } // import raw key const importedKey = await window.crypto.subtle.importKey( 'raw', // only 'raw' is allowed keyArray, {name: 'PBKDF2'}, // we use PBKDF2 for key derivation false, // the key may not be exported ['deriveKey'] // we may only use it for key derivation ).catch(Alert.showError); // derive a stronger key for use with AES return window.crypto.subtle.deriveKey( { name: 'PBKDF2', // we use PBKDF2 for key derivation salt: stringToArraybuffer(spec[1]), // salt used in HMAC iterations: spec[2], // amount of iterations to apply hash: {name: 'SHA-256'} // can be "SHA-1", "SHA-256", "SHA-384" or "SHA-512" }, importedKey, { name: 'AES-' + spec[6].toUpperCase(), // can be any supported AES algorithm ("AES-CTR", "AES-CBC", "AES-CMAC", "AES-GCM", "AES-CFB", "AES-KW", "ECDH", "DH" or "HMAC") length: spec[3] // can be 128, 192 or 256 }, false, // the key may not be exported ['encrypt', 'decrypt'] // we may only use it for en- and decryption ).catch(Alert.showError); } /** * gets crypto settings from specification and authenticated data * * @name CryptTool.cryptoSettings * @function * @private * @param {string} adata authenticated data * @param {array} spec cryptographic specification * @return {object} crypto settings */ function cryptoSettings(adata, spec) { return { name: 'AES-' + spec[6].toUpperCase(), // can be any supported AES algorithm ("AES-CTR", "AES-CBC", "AES-CMAC", "AES-GCM", "AES-CFB", "AES-KW", "ECDH", "DH" or "HMAC") iv: stringToArraybuffer(spec[0]), // the initialization vector you used to encrypt additionalData: stringToArraybuffer(adata), // the addtional data you used during encryption (if any) tagLength: spec[4] // the length of the tag you used to encrypt (if any) }; } /** * compress, then encrypt message with given key and password * * @name CryptTool.cipher * @async * @function * @param {string} key * @param {string} password * @param {string} message * @param {array} adata * @return {array} encrypted message in base64 encoding & adata containing encryption spec */ me.cipher = async function(key, password, message, adata) { let zlib = (await z); // AES in Galois Counter Mode, keysize 256 bit, // authentication tag 128 bit, 10000 iterations in key derivation const compression = ( typeof zlib === 'undefined' ? 'none' : // client lacks support for WASM ($('body').data('compression') || 'zlib') ), spec = [ getRandomBytes(16), // initialization vector getRandomBytes(8), // salt 100000, // iterations 256, // key size 128, // tag size 'aes', // algorithm 'gcm', // algorithm mode compression // compression ], encodedSpec = []; for (let i = 0; i < spec.length; ++i) { encodedSpec[i] = i < 2 ? btoa(spec[i]) : spec[i]; } if (adata.length === 0) { // comment adata = encodedSpec; } else if (adata[0] === null) { // paste adata[0] = encodedSpec; } // finally, encrypt message return [ btoa( arraybufferToString( await window.crypto.subtle.encrypt( cryptoSettings(JSON.stringify(adata), spec), await deriveKey(key, password, spec), await compress(message, compression, zlib) ).catch(Alert.showError) ) ), adata ]; }; /** * decrypt message with key, then decompress * * @name CryptTool.decipher * @async * @function * @param {string} key * @param {string} password * @param {string|object} data encrypted message * @return {string} decrypted message, empty if decryption failed */ me.decipher = async function(key, password, data) { let adataString, spec, cipherMessage, plaintext; let zlib = (await z); if (data instanceof Array) { // version 2 adataString = JSON.stringify(data[1]); // clone the array instead of passing the reference spec = (data[1][0] instanceof Array ? data[1][0] : data[1]).slice(); cipherMessage = data[0]; } else if (typeof data === 'string') { // version 1 let object = JSON.parse(data); adataString = atob(object.adata); spec = [ object.iv, object.salt, object.iter, object.ks, object.ts, object.cipher, object.mode, 'rawdeflate' ]; cipherMessage = object.ct; } else { throw 'unsupported message format'; } spec[0] = atob(spec[0]); spec[1] = atob(spec[1]); if (spec[7] === 'zlib') { if (typeof zlib === 'undefined') { throw 'Error decompressing paste, due to missing WebAssembly support.' } } try { plaintext = await window.crypto.subtle.decrypt( cryptoSettings(adataString, spec), await deriveKey(key, password, spec), stringToArraybuffer( atob(cipherMessage) ) ); } catch(err) { console.error(err); return ''; } try { return await decompress(plaintext, spec[7], zlib); } catch(err) { Alert.showError(err); return err; } }; /** * returns a random symmetric key * * generates 256 bit long keys (8 Bits * 32) for AES with 256 bit long blocks * * @name CryptTool.getSymmetricKey * @function * @throws {string} * @return {string} raw bytes */ me.getSymmetricKey = function() { return getRandomBytes(32); }; /** * base58 encode a DOMString (UTF-16) * * @name CryptTool.base58encode * @function * @param {string} input * @return {string} output */ me.base58encode = function(input) { return base58.encode( stringToArraybuffer(input) ); } /** * base58 decode a DOMString (UTF-16) * * @name CryptTool.base58decode * @function * @param {string} input * @return {string} output */ me.base58decode = function(input) { return arraybufferToString( base58.decode(input) ); } return me; })(); /** * (Model) Data source (aka MVC) * * @name Model * @class */ const Model = (function () { const me = {}; let id = null, pasteData = null, symmetricKey = null, $templates; /** * returns the expiration set in the HTML * * @name Model.getExpirationDefault * @function * @return string */ me.getExpirationDefault = function() { return $('#pasteExpiration').val(); }; /** * returns the format set in the HTML * * @name Model.getFormatDefault * @function * @return string */ me.getFormatDefault = function() { return $('#pasteFormatter').val(); }; /** * returns the paste data (including the cipher data) * * @name Model.getPasteData * @function * @param {function} callback (optional) Called when data is available * @param {function} useCache (optional) Whether to use the cache or * force a data reload. Default: true * @return string */ me.getPasteData = function(callback, useCache) { // use cache if possible/allowed if (useCache !== false && pasteData !== null) { //execute callback if (typeof callback === 'function') { return callback(pasteData); } // alternatively just using inline return pasteData; } // reload data ServerInteraction.prepare(); ServerInteraction.setUrl(Helper.baseUri() + '?pasteid=' + me.getPasteId()); ServerInteraction.setFailure(function (status, data) { // revert loading status… Alert.hideLoading(); TopNav.showViewButtons(); // show error message Alert.showError(ServerInteraction.parseUploadError(status, data, 'get paste data')); }); ServerInteraction.setSuccess(function (status, data) { pasteData = new Paste(data); if (typeof callback === 'function') { return callback(pasteData); } }); ServerInteraction.run(); }; /** * get the pastes unique identifier from the URL, * eg. https://example.com/path/?c05354954c49a487#dfdsdgdgdfgdf returns c05354954c49a487 * * @name Model.getPasteId * @function * @return {string} unique identifier * @throws {string} */ me.getPasteId = function() { const idRegEx = /^[a-z0-9]{16}$/; // return cached value if (id !== null) { return id; } // do use URL interface, if possible const url = new URL(window.location); for (const param of url.searchParams) { const key = param[0]; const value = param[1]; if (value === '' && idRegEx.test(key)) { // safe, as the whole regex is matched id = key; return key; } } if (id === null) { throw 'no paste id given'; } return id; } /** * returns true, when the URL has a delete token and the current call was used for deleting a paste. * * @name Model.hasDeleteToken * @function * @return {bool} */ me.hasDeleteToken = function() { return window.location.search.indexOf('deletetoken') !== -1; } /** * return the deciphering key stored in anchor part of the URL * * @name Model.getPasteKey * @function * @return {string|null} key * @throws {string} */ me.getPasteKey = function() { if (symmetricKey === null) { let startPos = 1; if(window.location.hash.startsWith(loadConfirmPrefix)) { startPos = loadConfirmPrefix.length; } let newKey = window.location.hash.substring(startPos); // Some web 2.0 services and redirectors add data AFTER the anchor // (such as &utm_source=...). We will strip any additional data. let ampersandPos = newKey.indexOf('&'); if (ampersandPos > -1) { newKey = newKey.substring(0, ampersandPos); } if (newKey === '') { throw 'no encryption key given'; } // version 2 uses base58, version 1 uses base64 without decoding try { // base58 encode strips NULL bytes at the beginning of the // string, so we re-add them if necessary symmetricKey = CryptTool.base58decode(newKey).padStart(32, '\u0000'); } catch(e) { symmetricKey = newKey; } } return symmetricKey; }; /** * returns a jQuery copy of the HTML template * * @name Model.getTemplate * @function * @param {string} name - the name of the template * @return {jQuery} */ me.getTemplate = function(name) { // find template let $element = $templates.find('#' + name + 'template').clone(true); // change ID to avoid collisions (one ID should really be unique) return $element.prop('id', name); }; /** * resets state, used for unit testing * * @name Model.reset * @function */ me.reset = function() { pasteData = $templates = id = symmetricKey = null; }; /** * init navigation manager * * preloads jQuery elements * * @name Model.init * @function */ me.init = function() { $templates = $('#templates'); }; return me; })(); /** * Helper functions for user interface * * everything directly UI-related, which fits nowhere else * * @name UiHelper * @class */ const UiHelper = (function () { const me = {}; /** * handle history (pop) state changes * * currently this does only handle redirects to the home page. * * @name UiHelper.historyChange * @private * @function * @param {Event} event */ function historyChange(event) { let currentLocation = Helper.baseUri(); if (event.originalEvent.state === null && // no state object passed event.target.location.href === currentLocation && // target location is home page window.location.href === currentLocation // and we are not already on the home page ) { // redirect to home page window.location.href = currentLocation; } } /** * reload the page * * This takes the user to the PrivateBin homepage. * * @name UiHelper.reloadHome * @function */ me.reloadHome = function() { window.location.href = Helper.baseUri(); }; /** * checks whether the element is currently visible in the viewport (so * the user can actually see it) * * @see {@link https://stackoverflow.com/a/40658647} * @name UiHelper.isVisible * @function * @param {jQuery} $element The link hash to move to. */ me.isVisible = function($element) { let elementTop = $element.offset().top, viewportTop = $(window).scrollTop(), viewportBottom = viewportTop + $(window).height(); return elementTop > viewportTop && elementTop < viewportBottom; }; /** * scrolls to a specific element * * @see {@link https://stackoverflow.com/questions/4198041/jquery-smooth-scroll-to-an-anchor#answer-12714767} * @name UiHelper.scrollTo * @function * @param {jQuery} $element The link hash to move to. * @param {(number|string)} animationDuration passed to jQuery .animate, when set to 0 the animation is skipped * @param {string} animationEffect passed to jQuery .animate * @param {function} finishedCallback function to call after animation finished */ me.scrollTo = function($element, animationDuration, animationEffect, finishedCallback) { let $body = $('html, body'), margin = 50, callbackCalled = false, dest = 0; // calculate destination place // if it would scroll out of the screen at the bottom only scroll it as // far as the screen can go if ($element.offset().top > $(document).height() - $(window).height()) { dest = $(document).height() - $(window).height(); } else { dest = $element.offset().top - margin; } // skip animation if duration is set to 0 if (animationDuration === 0) { window.scrollTo(0, dest); } else { // stop previous animation $body.stop(); // scroll to destination $body.animate({ scrollTop: dest }, animationDuration, animationEffect); } // as we have finished we can enable scrolling again $body.queue(function (next) { if (!callbackCalled) { // call user function if needed if (typeof finishedCallback !== 'undefined') { finishedCallback(); } // prevent calling this function twice callbackCalled = true; } next(); }); }; /** * trigger a history (pop) state change * * used to test the UiHelper.historyChange private function * * @name UiHelper.mockHistoryChange * @function * @param {string} state (optional) state to mock */ me.mockHistoryChange = function(state) { if (typeof state === 'undefined') { state = null; } historyChange($.Event('popstate', {originalEvent: new PopStateEvent('popstate', {state: state}), target: window})); }; /** * initialize * * @name UiHelper.init * @function */ me.init = function() { // update link to home page $('.reloadlink').prop('href', Helper.baseUri()); $(window).on('popstate', historyChange); }; return me; })(); /** * Alert/error manager * * @name Alert * @class */ const Alert = (function () { const me = {}; let $errorMessage, $loadingIndicator, $statusMessage, $remainingTime, currentIcon, customHandler; const alertType = [ 'loading', // not in bootstrap CSS, but using a plausible value here 'info', // status icon 'warning', // warning icon 'danger' // error icon ]; /** * forwards a request to the i18n module and shows the element * * @name Alert.handleNotification * @private * @function * @param {int} id - id of notification * @param {jQuery} $element - jQuery object * @param {string|array} args * @param {string|null} icon - optional, icon */ function handleNotification(id, $element, args, icon) { // basic parsing/conversion of parameters if (typeof icon === 'undefined') { icon = null; } if (typeof args === 'undefined') { args = null; } else if (typeof args === 'string') { // convert string to array if needed args = [args]; } else if (args instanceof Error) { // extract message into array if needed args = [args.message]; } // pass to custom handler if defined if (typeof customHandler === 'function') { let handlerResult = customHandler(alertType[id], $element, args, icon); if (handlerResult === true) { // if it returns true, skip own handler return; } if (handlerResult instanceof jQuery) { // continue processing with new element $element = handlerResult; icon = null; // icons not supported in this case } } let $translationTarget = $element; // handle icon, if template uses one const $glyphIcon = $element.find(':first'); if ($glyphIcon.length) { // if there is an icon, we need to provide an inner element // to translate the message into, instead of the parent $translationTarget = $(''); $element.html(' ').prepend($glyphIcon).append($translationTarget); if (icon !== null && // icon was passed icon !== currentIcon[id] // and it differs from current icon ) { // remove (previous) icon $glyphIcon.removeClass(currentIcon[id]); // any other thing as a string (e.g. 'null') (only) removes the icon if (typeof icon === 'string') { // set new icon currentIcon[id] = 'glyphicon-' + icon; $glyphIcon.addClass(currentIcon[id]); } } } // show text if (args !== null) { // add jQuery object to it as first parameter args.unshift($translationTarget); // pass it to I18n I18n._.apply(this, args); } // show notification $element.removeClass('hidden'); } /** * display a status message * * This automatically passes the text to I18n for translation. * * @name Alert.showStatus * @function * @param {string|array} message string, use an array for %s/%d options * @param {string|null} icon optional, the icon to show, * default: leave previous icon */ me.showStatus = function(message, icon) { handleNotification(1, $statusMessage, message, icon); }; /** * display a warning message * * This automatically passes the text to I18n for translation. * * @name Alert.showWarning * @function * @param {string|array} message string, use an array for %s/%d options * @param {string|null} icon optional, the icon to show, default: * leave previous icon */ me.showWarning = function(message, icon) { $errorMessage.find(':first') .removeClass(currentIcon[3]) .addClass(currentIcon[2]); handleNotification(2, $errorMessage, message, icon); }; /** * display an error message * * This automatically passes the text to I18n for translation. * * @name Alert.showError * @function * @param {string|array} message string, use an array for %s/%d options * @param {string|null} icon optional, the icon to show, default: * leave previous icon */ me.showError = function(message, icon) { handleNotification(3, $errorMessage, message, icon); }; /** * display remaining message * * This automatically passes the text to I18n for translation. * * @name Alert.showRemaining * @function * @param {string|array} message string, use an array for %s/%d options */ me.showRemaining = function(message) { handleNotification(1, $remainingTime, message); }; /** * shows a loading message, optionally with a percentage * * This automatically passes all texts to the i10s module. * * @name Alert.showLoading * @function * @param {string|array|null} message optional, use an array for %s/%d options, default: 'Loading…' * @param {string|null} icon optional, the icon to show, default: leave previous icon */ me.showLoading = function(message, icon) { // default message text if (typeof message === 'undefined') { message = 'Loading…'; } handleNotification(0, $loadingIndicator, message, icon); // show loading status (cursor) $('body').addClass('loading'); }; /** * hides the loading message * * @name Alert.hideLoading * @function */ me.hideLoading = function() { $loadingIndicator.addClass('hidden'); // hide loading cursor $('body').removeClass('loading'); }; /** * hides any status/error messages * * This does not include the loading message. * * @name Alert.hideMessages * @function */ me.hideMessages = function() { $statusMessage.addClass('hidden'); $errorMessage.addClass('hidden'); }; /** * set a custom handler, which gets all notifications. * * This handler gets the following arguments: * alertType (see array), $element, args, icon * If it returns true, the own processing will be stopped so the message * will not be displayed. Otherwise it will continue. * As an aditional feature it can return q jQuery element, which will * then be used to add the message there. Icons are not supported in * that case and will be ignored. * Pass 'null' to reset/delete the custom handler. * Note that there is no notification when a message is supposed to get * hidden. * * @name Alert.setCustomHandler * @function * @param {function|null} newHandler */ me.setCustomHandler = function(newHandler) { customHandler = newHandler; }; /** * init status manager * * preloads jQuery elements * * @name Alert.init * @function */ me.init = function() { // hide "no javascript" error message $('#noscript').hide(); // not a reset, but first set of the elements $errorMessage = $('#errormessage'); $loadingIndicator = $('#loadingindicator'); $statusMessage = $('#status'); $remainingTime = $('#remainingtime'); currentIcon = [ 'glyphicon-time', // loading icon 'glyphicon-info-sign', // status icon 'glyphicon-warning-sign', // warning icon 'glyphicon-alert' // error icon ]; }; return me; })(); /** * handles paste status/result * * @name PasteStatus * @class */ const PasteStatus = (function () { const me = {}; let $pasteSuccess, $pasteUrl, $remainingTime, $shortenButton; /** * forward to URL shortener * * @name PasteStatus.sendToShortener * @private * @function */ function sendToShortener() { if ($shortenButton.hasClass('buttondisabled')) { return; } $.ajax({ type: 'GET', url: `${$shortenButton.data('shortener')}${encodeURIComponent($pasteUrl.attr('href'))}`, headers: {'Accept': 'text/html, application/xhtml+xml, application/xml, application/json'}, processData: false, timeout: 10000, xhrFields: { withCredentials: false }, success: PasteStatus.extractUrl }) .fail(function(data, textStatus, errorThrown) { console.error(textStatus, errorThrown); // we don't know why it failed, could be CORS of the external // server not setup properly, in which case we follow old // behavior to open it in new tab window.open( `${$shortenButton.data('shortener')}${encodeURIComponent($pasteUrl.attr('href'))}`, '_blank', 'noopener, noreferrer' ); }); } /** * Forces opening the paste if the link does not do this automatically. * * This is necessary as browsers will not reload the page when it is * already loaded (which is fake as it is set via history.pushState()). * * @name PasteStatus.pasteLinkClick * @function */ function pasteLinkClick() { // check if location is (already) shown in URL bar if (window.location.href === $pasteUrl.attr('href')) { // if so we need to load link by reloading the current site window.location.reload(true); } } /** * creates a notification after a successfull paste upload * * @name PasteStatus.createPasteNotification * @function * @param {string} url * @param {string} deleteUrl */ me.createPasteNotification = function(url, deleteUrl) { I18n._( $('#pastelink'), 'Your paste is %s (Hit [Ctrl]+[c] to copy)', url, url ); // save newly created element $pasteUrl = $('#pasteurl'); // and add click event $pasteUrl.click(pasteLinkClick); // delete link $('#deletelink').html(''); I18n._($('#deletelink a').first(), 'Delete data'); // enable shortener button $shortenButton.removeClass('buttondisabled'); // show result $pasteSuccess.removeClass('hidden'); // we pre-select the link so that the user only has to [Ctrl]+[c] the link Helper.selectText($pasteUrl[0]); }; /** * extracts URLs from given string * * if at least one is found, it disables the shortener button and * replaces the paste URL * * @name PasteStatus.extractUrl * @function * @param {string} response */ me.extractUrl = function(response) { if (typeof response === 'object') { response = JSON.stringify(response); } if (typeof response === 'string' && response.length > 0) { const shortUrlMatcher = /https?:\/\/[^\s"<]+/g; // JSON API will have URL in quotes, XML in tags const shortUrl = (response.match(shortUrlMatcher) || []).filter(function(urlRegExMatch) { if (typeof URL.canParse === 'function') { return URL.canParse(urlRegExMatch); } // polyfill for older browsers (< 120) & node (< 19.9 & < 18.17) try { return !!new URL(urlRegExMatch); } catch (error) { return false; } }).sort(function(a, b) { return a.length - b.length; // shortest first })[0]; if (typeof shortUrl === 'string' && shortUrl.length > 0) { // we disable the button to avoid calling shortener again $shortenButton.addClass('buttondisabled'); // update link $pasteUrl.text(shortUrl); $pasteUrl.prop('href', shortUrl); // we pre-select the link so that the user only has to [Ctrl]+[c] the link Helper.selectText($pasteUrl[0]); return; } } Alert.showError('Cannot parse response from URL shortener.'); }; /** * shows the remaining time * * @name PasteStatus.showRemainingTime * @function * @param {Paste} paste */ me.showRemainingTime = function(paste) { if (paste.isBurnAfterReadingEnabled()) { // display paste "for your eyes only" if it is deleted // the paste has been deleted when the JSON with the ciphertext // has been downloaded Alert.showRemaining('FOR YOUR EYES ONLY. Don\'t close this window, this message can\'t be displayed again.'); $remainingTime.addClass('foryoureyesonly'); } else if (paste.getTimeToLive() > 0) { // display paste expiration let expiration = Helper.secondsToHuman(paste.getTimeToLive()), expirationLabel = [ 'This document will expire in %d ' + expiration[1] + '.', 'This document will expire in %d ' + expiration[1] + 's.' ]; Alert.showRemaining([expirationLabel, expiration[0]]); $remainingTime.removeClass('foryoureyesonly'); } else { // never expires return; } // in the end, display notification $remainingTime.removeClass('hidden'); }; /** * hides the remaining time and successful upload notification * * @name PasteStatus.hideMessages * @function */ me.hideMessages = function() { $remainingTime.addClass('hidden'); $pasteSuccess.addClass('hidden'); }; /** * init status manager * * preloads jQuery elements * * @name PasteStatus.init * @function */ me.init = function() { $pasteSuccess = $('#pastesuccess'); // $pasteUrl is saved in me.createPasteNotification() after creation $remainingTime = $('#remainingtime'); $shortenButton = $('#shortenbutton'); // bind elements $shortenButton.click(sendToShortener); }; return me; })(); /** * password prompt * * @name Prompt * @class */ const Prompt = (function () { const me = {}; let $passwordDecrypt, $passwordForm, $passwordModal, password = ''; /** * submit a password in the modal dialog * * @name Prompt.submitPasswordModal * @private * @function * @param {Event} event */ function submitPasswordModal(event) { event.preventDefault(); // get input password = $passwordDecrypt.val(); // hide modal $passwordModal.modal('hide'); PasteDecrypter.run(); } /** * Request users confirmation to load possibly burn after reading paste * * @name Prompt.requestLoadConfirmation * @function */ me.requestLoadConfirmation = function() { const $loadconfirmmodal = $('#loadconfirmmodal'); if ($loadconfirmmodal.length > 0) { const $loadconfirmOpenNow = $loadconfirmmodal.find('#loadconfirm-open-now'); $loadconfirmOpenNow.off('click.loadPaste'); $loadconfirmOpenNow.on('click.loadPaste', PasteDecrypter.run); const $loadconfirmClose = $loadconfirmmodal.find('.close'); $loadconfirmClose.off('click.close'); $loadconfirmClose.on('click.close', Controller.newPaste); $loadconfirmmodal.modal('show'); } else { if (window.confirm( I18n._('Burn after reading pastes can only be displayed once upon loading it. Do you want to open it now?') )) { PasteDecrypter.run(); } else { Controller.newPaste(); } } } /** * ask the user for the password and set it * * @name Prompt.requestPassword * @function */ me.requestPassword = function() { // show new bootstrap method (if available) if ($passwordModal.length !== 0) { $passwordModal.modal({ backdrop: 'static', keyboard: false }); // focus password input $passwordDecrypt.focus(); // then re-focus it, when modal causes it to loose focus again setTimeout(function () { $passwordDecrypt.focus(); }, 500); return; } // fallback to old method for page template password = prompt(I18n._('Please enter the password for this paste:'), ''); if (password === null) { throw 'password prompt canceled'; } if (password.length === 0) { // recurse… return me.requestPassword(); } PasteDecrypter.run(); }; /** * get the cached password * * If you do not get a password with this function * (returns an empty string), use requestPassword. * * @name Prompt.getPassword * @function * @return {string} */ me.getPassword = function() { return password; }; /** * resets the password to an empty string * * @name Prompt.reset * @function */ me.reset = function() { // reset internal password = ''; // and also reset UI $passwordDecrypt.val(''); } /** * init status manager * * preloads jQuery elements * * @name Prompt.init * @function */ me.init = function() { $passwordDecrypt = $('#passworddecrypt'); $passwordForm = $('#passwordform'); $passwordModal = $('#passwordmodal'); // bind events - handle Model password submission $passwordForm.submit(submitPasswordModal); }; return me; })(); /** * Manage paste/message input, and preview tab * * Note that the actual preview is handled by PasteViewer. * * @name Editor * @class */ const Editor = (function () { const me = {}; let $editorTabs, $messageEdit, $messagePreview, $message, isPreview = false; /** * support input of tab character * * @name Editor.supportTabs * @function * @param {Event} event * @this $message (but not used, so it is jQuery-free, possibly faster) */ function supportTabs(event) { const keyCode = event.keyCode || event.which; // tab was pressed if (keyCode === 9) { // get caret position & selection const 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; // prevent the textarea to lose focus event.preventDefault(); } } /** * view the Editor tab * * @name Editor.viewEditor * @function * @param {Event} event - optional */ function viewEditor(event) { // toggle buttons $messageEdit.addClass('active'); $messagePreview.removeClass('active'); $('#messageedit').attr('aria-selected','true'); $('#messagepreview').attr('aria-selected','false'); PasteViewer.hide(); // reshow input $message.removeClass('hidden'); me.focusInput(); // finish isPreview = false; // prevent jumping of page to top if (typeof event !== 'undefined') { event.preventDefault(); } } /** * view the preview tab * * @name Editor.viewPreview * @function * @param {Event} event */ function viewPreview(event) { // toggle buttons $messageEdit.removeClass('active'); $messagePreview.addClass('active'); $('#messageedit').attr('aria-selected','false'); $('#messagepreview').attr('aria-selected','true'); // hide input as now preview is shown $message.addClass('hidden'); // show preview PasteViewer.setText($message.val()); if (AttachmentViewer.hasAttachmentData()) { const attachment = AttachmentViewer.getAttachment(); AttachmentViewer.handleBlobAttachmentPreview( AttachmentViewer.getAttachmentPreview(), attachment[0], attachment[1] ); } PasteViewer.run(); // finish isPreview = true; // prevent jumping of page to top if (typeof event !== 'undefined') { event.preventDefault(); } } /** * get the state of the preview * * @name Editor.isPreview * @function */ me.isPreview = function() { return isPreview; }; /** * reset the Editor view * * @name Editor.resetInput * @function */ me.resetInput = function() { // go back to input if (isPreview) { viewEditor(); } // clear content $message.val(''); }; /** * shows the Editor * * @name Editor.show * @function */ me.show = function() { $message.removeClass('hidden'); $editorTabs.removeClass('hidden'); }; /** * hides the Editor * * @name Editor.hide * @function */ me.hide = function() { $message.addClass('hidden'); $editorTabs.addClass('hidden'); }; /** * focuses the message input * * @name Editor.focusInput * @function */ me.focusInput = function() { $message.focus(); }; /** * sets a new text * * @name Editor.setText * @function * @param {string} newText */ me.setText = function(newText) { $message.val(newText); }; /** * returns the current text * * @name Editor.getText * @function * @return {string} */ me.getText = function() { return $message.val(); }; /** * init status manager * * preloads jQuery elements * * @name Editor.init * @function */ me.init = function() { $editorTabs = $('#editorTabs'); $message = $('#message'); // bind events $message.keydown(supportTabs); // bind click events to tab switchers (a), but save parent of them // (li) $messageEdit = $('#messageedit').click(viewEditor).parent(); $messagePreview = $('#messagepreview').click(viewPreview).parent(); }; return me; })(); /** * (view) Parse and show paste. * * @name PasteViewer * @class */ const PasteViewer = (function () { const me = {}; let $placeholder, $prettyMessage, $prettyPrint, $plainText, text, format = 'plaintext', isDisplayed = false, isChanged = true; // by default true as nothing was parsed yet /** * apply the set format on paste and displays it * * @name PasteViewer.parsePaste * @private * @function */ function parsePaste() { // skip parsing if no text is given if (text === '') { return; } if (format === 'markdown') { const converter = new showdown.Converter({ strikethrough: true, tables: true, tablesHeaderId: true, simplifiedAutoLink: true, excludeTrailingPunctuationFromURLs: true }); // let showdown convert the HTML and sanitize HTML *afterwards*! $plainText.html( DOMPurify.sanitize( converter.makeHtml(text), purifyHtmlConfig ) ); // add table classes from bootstrap css $plainText.find('table').addClass('table-condensed table-bordered'); } else { if (format === 'syntaxhighlighting') { // yes, this is really needed to initialize the environment if (typeof prettyPrint === 'function') { prettyPrint(); } $prettyPrint.html( prettyPrintOne( Helper.htmlEntities(text), null, true ) ); } else { // = 'plaintext' $prettyPrint.text(text); } Helper.urls2links($prettyPrint); $prettyPrint.css('white-space', 'pre-wrap'); $prettyPrint.css('word-break', 'normal'); $prettyPrint.removeClass('prettyprint'); } } /** * displays the paste * * @name PasteViewer.showPaste * @private * @function */ function showPaste() { // instead of "nothing" better display a placeholder if (text === '') { $placeholder.removeClass('hidden'); return; } // otherwise hide the placeholder $placeholder.addClass('hidden'); switch (format) { case 'markdown': $plainText.removeClass('hidden'); $prettyMessage.addClass('hidden'); break; default: $plainText.addClass('hidden'); $prettyMessage.removeClass('hidden'); break; } } /** * sets the format in which the text is shown * * @name PasteViewer.setFormat * @function * @param {string} newFormat the new format */ me.setFormat = function(newFormat) { // skip if there is no update if (format === newFormat) { return; } // needs to update display too, if we switch from or to Markdown if (format === 'markdown' || newFormat === 'markdown') { isDisplayed = false; } format = newFormat; isChanged = true; }; /** * returns the current format * * @name PasteViewer.getFormat * @function * @return {string} */ me.getFormat = function() { return format; }; /** * returns whether the current view is pretty printed * * @name PasteViewer.isPrettyPrinted * @function * @return {bool} */ me.isPrettyPrinted = function() { return $prettyPrint.hasClass('prettyprinted'); }; /** * sets the text to show * * @name PasteViewer.setText * @function * @param {string} newText the text to show */ me.setText = function(newText) { if (text !== newText) { text = newText; isChanged = true; } }; /** * gets the current cached text * * @name PasteViewer.getText * @function * @return {string} */ me.getText = function() { return text; }; /** * show/update the parsed text (preview) * * @name PasteViewer.run * @function */ me.run = function() { if (isChanged) { parsePaste(); isChanged = false; } if (!isDisplayed) { showPaste(); isDisplayed = true; } }; /** * hide parsed text (preview) * * @name PasteViewer.hide * @function */ me.hide = function() { if (!isDisplayed) { return; } $plainText.addClass('hidden'); $prettyMessage.addClass('hidden'); $placeholder.addClass('hidden'); AttachmentViewer.hideAttachmentPreview(); isDisplayed = false; }; /** * init status manager * * preloads jQuery elements * * @name PasteViewer.init * @function */ me.init = function() { $placeholder = $('#placeholder'); $plainText = $('#plaintext'); $prettyMessage = $('#prettymessage'); $prettyPrint = $('#prettyprint'); // get default option from template/HTML or fall back to set value format = Model.getFormatDefault() || format; text = ''; isDisplayed = false; isChanged = true; }; return me; })(); /** * (view) Show attachment and preview if possible * * @name AttachmentViewer * @class */ const AttachmentViewer = (function () { const me = {}; let $attachmentLink, $attachmentPreview, $attachment, attachmentData, file, $fileInput, $dragAndDropFileName, attachmentHasPreview = false, $dropzone; /** * get blob URL from string data and mime type * * @name AttachmentViewer.getBlobUrl * @private * @function * @param {string} data - raw data of attachment * @param {string} data - mime type of attachment * @return {string} objectURL */ function getBlobUrl(data, mimeType) { // Transform into a Blob const buf = new Uint8Array(data.length); for (let i = 0; i < data.length; ++i) { buf[i] = data.charCodeAt(i); } const blob = new window.Blob( [buf], { type: mimeType } ); // Get blob URL return window.URL.createObjectURL(blob); } /** * sets the attachment but does not yet show it * * @name AttachmentViewer.setAttachment * @function * @param {string} attachmentData - base64-encoded data of file * @param {string} fileName - optional, file name */ me.setAttachment = function(attachmentData, fileName) { // skip, if attachments got disabled if (!$attachmentLink || !$attachmentPreview) return; // data URI format: data:[][;base64], // position in data URI string of where data begins const base64Start = attachmentData.indexOf(',') + 1; // position in data URI string of where mimeType ends const mimeTypeEnd = attachmentData.indexOf(';'); // extract mimeType const mimeType = attachmentData.substring(5, mimeTypeEnd); // extract data and convert to binary const rawData = attachmentData.substring(base64Start); const decodedData = rawData.length > 0 ? atob(rawData) : ''; let blobUrl = getBlobUrl(decodedData, mimeType); $attachmentLink.attr('href', blobUrl); if (typeof fileName !== 'undefined') { $attachmentLink.attr('download', fileName); } // sanitize SVG preview // prevents executing embedded scripts when CSP is not set and user // right-clicks/long-taps and opens the SVG in a new tab - prevented // in the preview by use of an img tag, which disables scripts, too if (mimeType.match(/^image\/.*svg/i)) { const sanitizedData = DOMPurify.sanitize( decodedData, purifySvgConfig ); blobUrl = getBlobUrl(sanitizedData, mimeType); } me.handleBlobAttachmentPreview($attachmentPreview, blobUrl, mimeType); }; /** * displays the attachment * * @name AttachmentViewer.showAttachment * @function */ me.showAttachment = function() { // skip, if attachments got disabled if (!$attachment || !$attachmentPreview) return; $attachment.removeClass('hidden'); if (attachmentHasPreview) { $attachmentPreview.removeClass('hidden'); } }; /** * removes the attachment * * This automatically hides the attachment containers too, to * prevent an inconsistent display. * * @name AttachmentViewer.removeAttachment * @function */ me.removeAttachment = function() { if (!$attachment.length) { return; } me.hideAttachment(); me.hideAttachmentPreview(); $attachmentLink.removeAttr('href'); $attachmentLink.removeAttr('download'); $attachmentLink.off('click'); $attachmentPreview.html(''); $dragAndDropFileName.text(''); AttachmentViewer.removeAttachmentData(); }; /** * removes the attachment data * * This removes the data, which would be uploaded otherwise. * * @name AttachmentViewer.removeAttachmentData * @function */ me.removeAttachmentData = function() { file = undefined; attachmentData = undefined; }; /** * Cleares the drag & drop data. * * @name AttachmentViewer.clearDragAndDrop * @function */ me.clearDragAndDrop = function() { $dragAndDropFileName.text(''); }; /** * hides the attachment * * This will not hide the preview (see AttachmentViewer.hideAttachmentPreview * for that) nor will it hide the attachment link if it was moved somewhere * else (see AttachmentViewer.moveAttachmentTo). * * @name AttachmentViewer.hideAttachment * @function */ me.hideAttachment = function() { $attachment.addClass('hidden'); }; /** * hides the attachment preview * * @name AttachmentViewer.hideAttachmentPreview * @function */ me.hideAttachmentPreview = function() { if ($attachmentPreview) { $attachmentPreview.addClass('hidden'); } }; /** * checks if there is an attachment displayed * * @name AttachmentViewer.hasAttachment * @function */ me.hasAttachment = function() { if (!$attachment.length) { return false; } const link = $attachmentLink.prop('href'); return (typeof link !== 'undefined' && link !== ''); }; /** * checks if there is attachment data (for preview!) available * * It returns true, when there is data that needs to be encrypted. * * @name AttachmentViewer.hasAttachmentData * @function */ me.hasAttachmentData = function() { if ($attachment.length) { return true; } return false; }; /** * return the attachment * * @name AttachmentViewer.getAttachment * @function * @returns {array} */ me.getAttachment = function() { return [ $attachmentLink.prop('href'), $attachmentLink.prop('download') ]; }; /** * moves the attachment link to another element * * It is advisable to hide the attachment afterwards (AttachmentViewer.hideAttachment) * * @name AttachmentViewer.moveAttachmentTo * @function * @param {jQuery} $element - the wrapper/container element where this should be moved to * @param {string} label - the text to show (%s will be replaced with the file name), will automatically be translated */ me.moveAttachmentTo = function($element, label) { // move elemement to new place $attachmentLink.appendTo($element); // update text - ensuring no HTML is inserted into the text node I18n._($attachmentLink, label, $attachmentLink.attr('download')); }; /** * read file data as data URL using the FileReader API * * @name AttachmentViewer.readFileData * @private * @function * @param {object} loadedFile (optional) loaded file object * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/FileReader#readAsDataURL()} */ function readFileData(loadedFile) { if (typeof FileReader === 'undefined') { // revert loading status… me.hideAttachment(); me.hideAttachmentPreview(); Alert.showWarning('Your browser does not support uploading encrypted files. Please use a newer browser.'); return; } const fileReader = new FileReader(); if (loadedFile === undefined) { loadedFile = $fileInput[0].files[0]; $dragAndDropFileName.text(''); } else { $dragAndDropFileName.text(loadedFile.name); } if (typeof loadedFile !== 'undefined') { file = loadedFile; fileReader.onload = function (event) { const dataURL = event.target.result; attachmentData = dataURL; if (Editor.isPreview()) { me.handleAttachmentPreview($attachmentPreview, dataURL); $attachmentPreview.removeClass('hidden'); } TopNav.highlightFileupload(); }; fileReader.readAsDataURL(loadedFile); } else { me.removeAttachmentData(); } } /** * handle the preview of files decoded to blob that can either be an image, video, audio or pdf element * * @name AttachmentViewer.handleBlobAttachmentPreview * @function * @argument {jQuery} $targetElement element where the preview should be appended * @argument {string} file as a blob URL * @argument {string} mime type */ me.handleBlobAttachmentPreview = function ($targetElement, blobUrl, mimeType) { if (blobUrl) { attachmentHasPreview = true; if (mimeType.match(/^image\//i)) { $targetElement.html( $(document.createElement('img')) .attr('src', blobUrl) .attr('class', 'img-thumbnail') ); } else if (mimeType.match(/^video\//i)) { $targetElement.html( $(document.createElement('video')) .attr('controls', 'true') .attr('autoplay', 'true') .attr('class', 'img-thumbnail') .append($(document.createElement('source')) .attr('type', mimeType) .attr('src', blobUrl)) ); } else if (mimeType.match(/^audio\//i)) { $targetElement.html( $(document.createElement('audio')) .attr('controls', 'true') .attr('autoplay', 'true') .append($(document.createElement('source')) .attr('type', mimeType) .attr('src', blobUrl)) ); } else if (mimeType.match(/\/pdf/i)) { // Fallback for browsers, that don't support the vh unit const clientHeight = $(window).height(); $targetElement.html( $(document.createElement('embed')) .attr('src', blobUrl) .attr('type', 'application/pdf') .attr('class', 'pdfPreview') .css('height', clientHeight) ); } else { attachmentHasPreview = false; } } }; /** * attaches the file attachment drag & drop handler to the page * * @name AttachmentViewer.addDragDropHandler * @private * @function */ function addDragDropHandler() { if (typeof $fileInput === 'undefined' || $fileInput.length === 0) { return; } const handleDragEnterOrOver = function(event) { event.stopPropagation(); event.preventDefault(); return false; }; const handleDrop = function(event) { const evt = event.originalEvent; evt.stopPropagation(); evt.preventDefault(); if (TopNav.isAttachmentReadonly()) { return false; } if ($fileInput) { const file = evt.dataTransfer.files[0]; //Clear the file input: $fileInput.wrap('
').closest('form').get(0).reset(); $fileInput.unwrap(); //Only works in Chrome: //fileInput[0].files = e.dataTransfer.files; readFileData(file); } }; $(document).draghover().on({ 'draghoverstart': function(e) { if (TopNav.isAttachmentReadonly()) { e.stopPropagation(); e.preventDefault(); return false; } // show dropzone to indicate drop support $dropzone.removeClass('hidden'); }, 'draghoverend': function() { $dropzone.addClass('hidden'); } }); $(document).on('drop', handleDrop); $(document).on('dragenter dragover', handleDragEnterOrOver); $fileInput.on('change', function () { readFileData(); }); } /** * attaches the clipboard attachment handler to the page * * @name AttachmentViewer.addClipboardEventHandler * @private * @function */ function addClipboardEventHandler() { $(document).on('paste', function (event) { const items = (event.clipboardData || event.originalEvent.clipboardData).items; const lastItem = items[items.length - 1]; if (lastItem.kind === 'file') { if (TopNav.isAttachmentReadonly()) { event.stopPropagation(); event.preventDefault(); return false; } else { readFileData(lastItem.getAsFile()); } } }); } /** * getter for attachment data * * @name AttachmentViewer.getAttachmentData * @function * @return {jQuery} */ me.getAttachmentData = function () { return attachmentData; }; /** * getter for attachment link * * @name AttachmentViewer.getAttachmentLink * @function * @return {jQuery} */ me.getAttachmentLink = function () { return $attachmentLink; }; /** * getter for attachment preview * * @name AttachmentViewer.getAttachmentPreview * @function * @return {jQuery} */ me.getAttachmentPreview = function () { return $attachmentPreview; }; /** * getter for file data, returns the file contents * * @name AttachmentViewer.getFile * @function * @return {string} */ me.getFile = function () { return file; }; /** * initiate * * preloads jQuery elements * * @name AttachmentViewer.init * @function */ me.init = function() { $attachment = $('#attachment'); $dragAndDropFileName = $('#dragAndDropFileName'); $dropzone = $('#dropzone'); $attachmentLink = $('#attachment a') || $(''); if($attachment.length) { $attachmentPreview = $('#attachmentPreview'); $fileInput = $('#file'); addDragDropHandler(); addClipboardEventHandler(); } } return me; })(); /** * (view) Shows discussion thread and handles replies * * @name DiscussionViewer * @class */ const DiscussionViewer = (function () { const me = {}; let $commentTail, $discussion, $reply, $replyMessage, $replyNickname, $replyStatus, $commentContainer, replyCommentId; /** * initializes the templates * * @name DiscussionViewer.initTemplates * @private * @function */ function initTemplates() { $reply = Model.getTemplate('reply'); $replyMessage = $reply.find('#replymessage'); $replyNickname = $reply.find('#nickname'); $replyStatus = $reply.find('#replystatus'); // cache jQuery elements $commentTail = Model.getTemplate('commenttail'); } /** * open the comment entry when clicking the "Reply" button of a comment * * @name DiscussionViewer.openReply * @private * @function * @param {Event} event */ function openReply(event) { const $source = $(event.target); // clear input $replyMessage.val(''); $replyNickname.val(''); // get comment id from source element replyCommentId = $source.parent().prop('id').split('_')[1]; // move to correct position $source.after($reply); // show $reply.removeClass('hidden'); $replyMessage.focus(); event.preventDefault(); } /** * custom handler for displaying notifications in own status message area * * @name DiscussionViewer.handleNotification * @function * @param {string} alertType * @return {bool|jQuery} */ me.handleNotification = function(alertType) { // ignore loading messages if (alertType === 'loading') { return false; } if (alertType === 'danger') { $replyStatus.removeClass('alert-info'); $replyStatus.addClass('alert-danger'); $replyStatus.find(':first').removeClass('glyphicon-alert'); $replyStatus.find(':first').addClass('glyphicon-info-sign'); } else { $replyStatus.removeClass('alert-danger'); $replyStatus.addClass('alert-info'); $replyStatus.find(':first').removeClass('glyphicon-info-sign'); $replyStatus.find(':first').addClass('glyphicon-alert'); } return $replyStatus; }; /** * adds another comment * * @name DiscussionViewer.addComment * @function * @param {Comment} comment * @param {string} commentText * @param {string} nickname */ me.addComment = function(comment, commentText, nickname) { if (commentText === '') { commentText = 'comment decryption failed'; } // create new comment based on template const $commentEntry = Model.getTemplate('comment'); $commentEntry.prop('id', 'comment_' + comment.id); const $commentEntryData = $commentEntry.find('div.commentdata'); // set & parse text $commentEntryData.text(commentText); Helper.urls2links($commentEntryData); // set nickname if (nickname.length > 0) { $commentEntry.find('span.nickname').text(nickname); } else { $commentEntry.find('span.nickname').html(''); I18n._($commentEntry.find('span.nickname i'), 'Anonymous'); } // set date $commentEntry.find('span.commentdate') .text(' (' + (new Date(comment.getCreated() * 1000).toLocaleString()) + ')') .attr('title', 'CommentID: ' + comment.id); // if an avatar is available, display it const icon = comment.getIcon(); if (icon) { $commentEntry.find('span.nickname') .before( ' ' ); $(document).on('languageLoaded', function () { $commentEntry.find('img.vizhash') .prop('title', I18n._('Avatar generated from IP address')); }); } // starting point (default value/fallback) let $place = $commentContainer; // if parent comment exists const $parentComment = $('#comment_' + comment.parentid); if ($parentComment.length) { // use parent as position for new comment, so it is shifted // to the right $place = $parentComment; } // finally append comment $place.append($commentEntry); }; /** * finishes the discussion area after last comment * * @name DiscussionViewer.finishDiscussion * @function */ me.finishDiscussion = function() { // add 'add new comment' area $commentContainer.append($commentTail); // show discussions $discussion.removeClass('hidden'); }; /** * removes the old discussion and prepares everything for creating a new * one. * * @name DiscussionViewer.prepareNewDiscussion * @function */ me.prepareNewDiscussion = function() { $commentContainer.html(''); $discussion.addClass('hidden'); // (re-)init templates initTemplates(); }; /** * returns the users message from the reply form * * @name DiscussionViewer.getReplyMessage * @function * @return {String} */ me.getReplyMessage = function() { return $replyMessage.val(); }; /** * returns the users nickname (if any) from the reply form * * @name DiscussionViewer.getReplyNickname * @function * @return {String} */ me.getReplyNickname = function() { return $replyNickname.val(); }; /** * returns the id of the parent comment the user is replying to * * @name DiscussionViewer.getReplyCommentId * @function * @return {int|undefined} */ me.getReplyCommentId = function() { return replyCommentId; }; /** * highlights a specific comment and scrolls to it if necessary * * @name DiscussionViewer.highlightComment * @function * @param {string} commentId * @param {bool} fadeOut - whether to fade out the comment */ me.highlightComment = function(commentId, fadeOut) { const $comment = $('#comment_' + commentId); // in case comment does not exist, cancel if ($comment.length === 0) { return; } $comment.addClass('highlight'); const highlightComment = function () { if (fadeOut === true) { setTimeout(function () { $comment.removeClass('highlight'); }, 300); } }; if (UiHelper.isVisible($comment)) { return highlightComment(); } UiHelper.scrollTo($comment, 100, 'swing', highlightComment); }; /** * initiate * * preloads jQuery elements * * @name DiscussionViewer.init * @function */ me.init = function() { // bind events to templates (so they are later cloned) $('#commenttailtemplate, #commenttemplate').find('button').on('click', openReply); $('#replytemplate').find('button').on('click', PasteEncrypter.sendComment); $commentContainer = $('#commentcontainer'); $discussion = $('#discussion'); }; return me; })(); /** * Manage top (navigation) bar * * @name TopNav * @param {object} window * @param {object} document * @class */ const TopNav = (function (window, document) { const me = {}; let createButtonsDisplayed = false, viewButtonsDisplayed = false, burnAfterReadingDefault = false, openDiscussionDefault = false, $attach, $burnAfterReading, $burnAfterReadingOption, $cloneButton, $customAttachment, $expiration, $fileRemoveButton, $fileWrap, $formatter, $newButton, $openDiscussion, $openDiscussionOption, $password, $passwordInput, $rawTextButton, $downloadTextButton, $qrCodeLink, $emailLink, $sendButton, $retryButton, pasteExpiration = null, retryButtonCallback; /** * set the expiration on bootstrap templates in dropdown * * @name TopNav.updateExpiration * @private * @function * @param {Event} event */ function updateExpiration(event) { // get selected option const target = $(event.target); // update dropdown display and save new expiration time $('#pasteExpirationDisplay').text(target.text()); pasteExpiration = target.data('expiration'); event.preventDefault(); } /** * set the format on bootstrap templates in dropdown from user interaction * * @name TopNav.updateFormat * @private * @function * @param {Event} event */ function updateFormat(event) { // get selected option const $target = $(event.target); // update dropdown display and save new format const newFormat = $target.data('format'); $('#pasteFormatterDisplay').text($target.text()); PasteViewer.setFormat(newFormat); // update preview if (Editor.isPreview()) { PasteViewer.run(); } event.preventDefault(); } /** * when "burn after reading" is checked, disable discussion * * @name TopNav.changeBurnAfterReading * @private * @function */ function changeBurnAfterReading() { if (me.getBurnAfterReading()) { $openDiscussionOption.addClass('buttondisabled'); $openDiscussion.prop('checked', false); // if button is actually disabled, force-enable it and uncheck other button $burnAfterReadingOption.removeClass('buttondisabled'); } else { $openDiscussionOption.removeClass('buttondisabled'); } } /** * when discussion is checked, disable "burn after reading" * * @name TopNav.changeOpenDiscussion * @private * @function */ function changeOpenDiscussion() { if (me.getOpenDiscussion()) { $burnAfterReadingOption.addClass('buttondisabled'); $burnAfterReading.prop('checked', false); // if button is actually disabled, force-enable it and uncheck other button $openDiscussionOption.removeClass('buttondisabled'); } else { $burnAfterReadingOption.removeClass('buttondisabled'); } } /** * Clear the attachment input in the top navigation. * * @name TopNav.clearAttachmentInput * @function */ function clearAttachmentInput() { // hide UI for selected files // our up-to-date jQuery can handle it :) $fileWrap.find('input').val(''); } /** * return raw text * * @name TopNav.rawText * @private * @function */ function rawText() { TopNav.hideAllButtons(); Alert.showLoading('Showing raw text…', 'time'); let paste = PasteViewer.getText(); // push a new state to allow back navigation with browser back button history.pushState( {type: 'raw'}, document.title, // recreate paste URL Helper.baseUri() + '?' + Model.getPasteId() + '#' + CryptTool.base58encode(Model.getPasteKey()) ); // we use text/html instead of text/plain to avoid a bug when // reloading the raw text view (it reverts to type text/html) const $head = $('head').children().not('noscript, script, link[type="text/css"]'), newDoc = document.open('text/html', 'replace'); newDoc.write(''); for (let i = 0; i < $head.length; ++i) { newDoc.write($head[i].outerHTML); } newDoc.write( '
' +
                DOMPurify.sanitize(
                    Helper.htmlEntities(paste),
                    purifyHtmlConfig
                ) +
                '
' ); newDoc.close(); } /** * download text * * @name TopNav.downloadText * @private * @function */ function downloadText() { var filename='paste-' + Model.getPasteId() + '.txt'; var text = PasteViewer.getText(); var element = document.createElement('a'); element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text)); element.setAttribute('download', filename); element.style.display = 'none'; document.body.appendChild(element); element.click(); document.body.removeChild(element); } /** * saves the language in a cookie and reloads the page * * @name TopNav.setLanguage * @private * @function * @param {Event} event */ function setLanguage(event) { document.cookie = 'lang=' + $(event.target).data('lang') + ';secure'; UiHelper.reloadHome(); event.preventDefault(); } /** * hides all messages and creates a new paste * * @name TopNav.clickNewPaste * @private * @function */ function clickNewPaste() { Controller.hideStatusMessages(); Controller.newPaste(); } /** * retrys some callback registered before * * @name TopNav.clickRetryButton * @private * @function * @param {Event} event */ function clickRetryButton(event) { retryButtonCallback(event); } /** * removes the existing attachment * * @name TopNav.removeAttachment * @private * @function * @param {Event} event */ function removeAttachment(event) { // if custom attachment is used, remove it first if (!$customAttachment.hasClass('hidden')) { AttachmentViewer.removeAttachment(); $customAttachment.addClass('hidden'); $fileWrap.removeClass('hidden'); } // in any case, remove saved attachment data AttachmentViewer.removeAttachmentData(); clearAttachmentInput(); AttachmentViewer.clearDragAndDrop(); // pevent '#' from appearing in the URL event.preventDefault(); } /** * Shows the QR code of the current paste (URL). * * @name TopNav.displayQrCode * @private * @function */ function displayQrCode() { const qrCanvas = kjua({ render: 'canvas', text: window.location.href }); $('#qrcode-display').html(qrCanvas); } /** * Template Email body. * * @name TopNav.templateEmailBody * @private * @param {string} expirationDateString * @param {bool} isBurnafterreading */ function templateEmailBody(expirationDateString, isBurnafterreading) { const EOL = '\n'; const BULLET = ' - '; let emailBody = ''; if (expirationDateString !== null || isBurnafterreading) { emailBody += I18n._('Notice:'); emailBody += EOL; if (expirationDateString !== null) { emailBody += EOL; emailBody += BULLET; // avoid DOMPurify mess with forward slash in expirationDateString emailBody += Helper.sprintf( I18n._( 'This link will expire after %s.', '%s' ), expirationDateString ); } if (isBurnafterreading) { emailBody += EOL; emailBody += BULLET; emailBody += I18n._( 'This link can only be accessed once, do not use back or refresh button in your browser.' ); } emailBody += EOL; emailBody += EOL; } emailBody += I18n._('Link:'); emailBody += EOL; emailBody += `${window.location.href}`; return emailBody; } /** * Trigger Email send. * * @name TopNav.triggerEmailSend * @private * @param {string} emailBody */ function triggerEmailSend(emailBody) { window.open( `mailto:?body=${encodeURIComponent(emailBody)}`, '_self', 'noopener, noreferrer' ); } /** * Send Email with current paste (URL). * * @name TopNav.sendEmail * @private * @function * @param {Date|null} expirationDate date of expiration * @param {bool} isBurnafterreading whether it is burn after reading */ function sendEmail(expirationDate, isBurnafterreading) { const expirationDateRoundedToSecond = new Date(expirationDate); // round down at least 30 seconds to make up for the delay of request expirationDateRoundedToSecond.setUTCSeconds( expirationDateRoundedToSecond.getUTCSeconds() - 30 ); expirationDateRoundedToSecond.setUTCSeconds(0); const $emailconfirmmodal = $('#emailconfirmmodal'); if ($emailconfirmmodal.length > 0) { if (expirationDate !== null) { const $emailconfirmTimezoneCurrent = $emailconfirmmodal.find('#emailconfirm-timezone-current'); const $emailconfirmTimezoneUtc = $emailconfirmmodal.find('#emailconfirm-timezone-utc'); $emailconfirmTimezoneCurrent.off('click.sendEmailCurrentTimezone'); $emailconfirmTimezoneCurrent.on('click.sendEmailCurrentTimezone', () => { const emailBody = templateEmailBody(expirationDateRoundedToSecond.toLocaleString(), isBurnafterreading); $emailconfirmmodal.modal('hide'); triggerEmailSend(emailBody); }); $emailconfirmTimezoneUtc.off('click.sendEmailUtcTimezone'); $emailconfirmTimezoneUtc.on('click.sendEmailUtcTimezone', () => { const emailBody = templateEmailBody(expirationDateRoundedToSecond.toLocaleString( undefined, // we don't use Date.prototype.toUTCString() because we would like to avoid GMT { timeZone: 'UTC', dateStyle: 'long', timeStyle: 'long' } ), isBurnafterreading); $emailconfirmmodal.modal('hide'); triggerEmailSend(emailBody); }); $emailconfirmmodal.modal('show'); } else { triggerEmailSend(templateEmailBody(null, isBurnafterreading)); } } else { let emailBody = ''; if (expirationDate !== null) { const expirationDateString = window.confirm( I18n._('Recipient may become aware of your timezone, convert time to UTC?') ) ? expirationDateRoundedToSecond.toLocaleString( undefined, // we don't use Date.prototype.toUTCString() because we would like to avoid GMT { timeZone: 'UTC', dateStyle: 'long', timeStyle: 'long' } ) : expirationDateRoundedToSecond.toLocaleString(); emailBody = templateEmailBody(expirationDateString, isBurnafterreading); } else { emailBody = templateEmailBody(null, isBurnafterreading); } triggerEmailSend(emailBody); } } /** * Shows all navigation elements for viewing an existing paste * * @name TopNav.showViewButtons * @function */ me.showViewButtons = function() { if (viewButtonsDisplayed) { return; } $newButton.removeClass('hidden'); $cloneButton.removeClass('hidden'); $rawTextButton.removeClass('hidden'); $downloadTextButton.removeClass('hidden'); $qrCodeLink.removeClass('hidden'); viewButtonsDisplayed = true; }; /** * Hides all navigation elements for viewing an existing paste * * @name TopNav.hideViewButtons * @function */ me.hideViewButtons = function() { if (!viewButtonsDisplayed) { return; } $cloneButton.addClass('hidden'); $newButton.addClass('hidden'); $rawTextButton.addClass('hidden'); $downloadTextButton.addClass('hidden'); $qrCodeLink.addClass('hidden'); me.hideEmailButton(); viewButtonsDisplayed = false; }; /** * Hides all elements belonging to existing pastes * * @name TopNav.hideAllButtons * @function */ me.hideAllButtons = function() { me.hideViewButtons(); me.hideCreateButtons(); }; /** * shows all elements needed when creating a new paste * * @name TopNav.showCreateButtons * @function */ me.showCreateButtons = function() { if (createButtonsDisplayed) { return; } $attach.removeClass('hidden'); $burnAfterReadingOption.removeClass('hidden'); $expiration.removeClass('hidden'); $formatter.removeClass('hidden'); $newButton.removeClass('hidden'); $openDiscussionOption.removeClass('hidden'); $password.removeClass('hidden'); $sendButton.removeClass('hidden'); createButtonsDisplayed = true; }; /** * shows all elements needed when creating a new paste * * @name TopNav.hideCreateButtons * @function */ me.hideCreateButtons = function() { if (!createButtonsDisplayed) { return; } $newButton.addClass('hidden'); $sendButton.addClass('hidden'); $expiration.addClass('hidden'); $formatter.addClass('hidden'); $burnAfterReadingOption.addClass('hidden'); $openDiscussionOption.addClass('hidden'); $password.addClass('hidden'); $attach.addClass('hidden'); createButtonsDisplayed = false; }; /** * only shows the "new paste" button * * @name TopNav.showNewPasteButton * @function */ me.showNewPasteButton = function() { $newButton.removeClass('hidden'); }; /** * only shows the "retry" button * * @name TopNav.showRetryButton * @function */ me.showRetryButton = function() { $retryButton.removeClass('hidden'); } /** * hides the "retry" button * * @name TopNav.hideRetryButton * @function */ me.hideRetryButton = function() { $retryButton.addClass('hidden'); } /** * show the "email" button * * @name TopNav.showEmailbutton * @function * @param {int|undefined} optionalRemainingTimeInSeconds */ me.showEmailButton = function(optionalRemainingTimeInSeconds) { try { // we cache expiration date in closure to avoid inaccurate expiration datetime const expirationDate = Helper.calculateExpirationDate( new Date(), typeof optionalRemainingTimeInSeconds === 'number' ? optionalRemainingTimeInSeconds : TopNav.getExpiration() ); const isBurnafterreading = TopNav.getBurnAfterReading(); $emailLink.removeClass('hidden'); $emailLink.off('click.sendEmail'); $emailLink.on('click.sendEmail', () => { sendEmail(expirationDate, isBurnafterreading); }); } catch (error) { console.error(error); Alert.showError('Cannot calculate expiration date.'); } } /** * hide the "email" button * * @name TopNav.hideEmailButton * @function */ me.hideEmailButton = function() { $emailLink.addClass('hidden'); $emailLink.off('click.sendEmail'); } /** * only hides the clone button * * @name TopNav.hideCloneButton * @function */ me.hideCloneButton = function() { $cloneButton.addClass('hidden'); }; /** * only hides the raw text button * * @name TopNav.hideRawButton * @function */ me.hideRawButton = function() { $rawTextButton.addClass('hidden'); }; /** * only hides the download text button * * @name TopNav.hideRawButton * @function */ me.hideDownloadButton = function() { $downloadTextButton.addClass('hidden'); }; /** * only hides the qr code button * * @name TopNav.hideQrCodeButton * @function */ me.hideQrCodeButton = function() { $qrCodeLink.addClass('hidden'); } /** * hide all irrelevant buttons when viewing burn after reading paste * * @name TopNav.hideBurnAfterReadingButtons * @function */ me.hideBurnAfterReadingButtons = function() { me.hideCloneButton(); me.hideQrCodeButton(); me.hideEmailButton(); } /** * hides the file selector in attachment * * @name TopNav.hideFileSelector * @function */ me.hideFileSelector = function() { $fileWrap.addClass('hidden'); }; /** * shows the custom attachment * * @name TopNav.showCustomAttachment * @function */ me.showCustomAttachment = function() { $customAttachment.removeClass('hidden'); }; /** * hides the custom attachment * * @name TopNav.hideCustomAttachment * @function */ me.hideCustomAttachment = function() { $customAttachment.addClass('hidden'); $fileWrap.removeClass('hidden'); }; /** * collapses the navigation bar, only if expanded * * @name TopNav.collapseBar * @function */ me.collapseBar = function() { if ($('#navbar').attr('aria-expanded') === 'true') { $('.navbar-toggle').click(); } }; /** * Reset the top navigation back to it's default values. * * @name TopNav.resetInput * @function */ me.resetInput = function() { clearAttachmentInput(); $burnAfterReading.prop('checked', burnAfterReadingDefault); $openDiscussion.prop('checked', openDiscussionDefault); if (openDiscussionDefault || !burnAfterReadingDefault) $openDiscussionOption.removeClass('buttondisabled'); if (burnAfterReadingDefault || !openDiscussionDefault) $burnAfterReadingOption.removeClass('buttondisabled'); pasteExpiration = Model.getExpirationDefault() || pasteExpiration; $('#pasteExpiration>option').each(function() { const $this = $(this); if ($this.val() === pasteExpiration) { $('#pasteExpirationDisplay').text($this.text()); } }); }; /** * returns the currently set expiration time * * @name TopNav.getExpiration * @function * @return {int} */ me.getExpiration = function() { return pasteExpiration; }; /** * returns the currently selected file(s) * * @name TopNav.getFileList * @function * @return {FileList|null} */ me.getFileList = function() { const $file = $('#file'); // if no file given, return null if (!$file.length || !$file[0].files.length) { return null; } // ensure the selected file is still accessible if (!($file[0].files && $file[0].files[0])) { return null; } return $file[0].files; }; /** * returns the state of the burn after reading checkbox * * @name TopNav.getBurnAfterReading * @function * @return {bool} */ me.getBurnAfterReading = function() { return $burnAfterReading.prop('checked'); }; /** * returns the state of the discussion checkbox * * @name TopNav.getOpenDiscussion * @function * @return {bool} */ me.getOpenDiscussion = function() { return $openDiscussion.prop('checked'); }; /** * returns the entered password * * @name TopNav.getPassword * @function * @return {string} */ me.getPassword = function() { // when password is disabled $passwordInput.val() will return undefined return $passwordInput.val() || ''; }; /** * returns the element where custom attachments can be placed * * Used by AttachmentViewer when an attachment is cloned here. * * @name TopNav.getCustomAttachment * @function * @return {jQuery} */ me.getCustomAttachment = function() { return $customAttachment; }; /** * Set a function to call when the retry button is clicked. * * @name TopNav.setRetryCallback * @function * @param {function} callback */ me.setRetryCallback = function(callback) { retryButtonCallback = callback; } /** * Highlight file upload * * @name TopNav.highlightFileupload * @function */ me.highlightFileupload = function() { // visually indicate file uploaded const $attachDropdownToggle = $attach.children('.dropdown-toggle'); if ($attachDropdownToggle.attr('aria-expanded') === 'false') { $attachDropdownToggle.click(); } $fileWrap.addClass('highlight'); setTimeout(function () { $fileWrap.removeClass('highlight'); }, 300); } /** * set the format on bootstrap templates in dropdown programmatically * * @name TopNav.setFormat * @function */ me.setFormat = function(format) { $formatter.parent().find(`a[data-format="${format}"]`).click(); } /** * returns if attachment dropdown is readonly, not editable * * @name TopNav.isAttachmentReadonly * @function * @return {bool} */ me.isAttachmentReadonly = function() { return !createButtonsDisplayed || $attach.hasClass('hidden'); } /** * init navigation manager * * preloads jQuery elements * * @name TopNav.init * @function */ me.init = function() { $attach = $('#attach'); $burnAfterReading = $('#burnafterreading'); $burnAfterReadingOption = $('#burnafterreadingoption'); $cloneButton = $('#clonebutton'); $customAttachment = $('#customattachment'); $expiration = $('#expiration'); $fileRemoveButton = $('#fileremovebutton'); $fileWrap = $('#filewrap'); $formatter = $('#formatter'); $newButton = $('#newbutton'); $openDiscussion = $('#opendiscussion'); $openDiscussionOption = $('#opendiscussionoption'); $password = $('#password'); $passwordInput = $('#passwordinput'); $rawTextButton = $('#rawtextbutton'); $downloadTextButton = $('#downloadtextbutton'); $retryButton = $('#retrybutton'); $sendButton = $('#sendbutton'); $qrCodeLink = $('#qrcodelink'); $emailLink = $('#emaillink'); // bootstrap template drop down $('#language ul.dropdown-menu li a').click(setLanguage); // page template drop down $('#language select option').click(setLanguage); // bind events $burnAfterReading.change(changeBurnAfterReading); $openDiscussionOption.change(changeOpenDiscussion); $newButton.click(clickNewPaste); $sendButton.click(PasteEncrypter.sendPaste); $cloneButton.click(Controller.clonePaste); $rawTextButton.click(rawText); $downloadTextButton.click(downloadText); $retryButton.click(clickRetryButton); $fileRemoveButton.click(removeAttachment); $qrCodeLink.click(displayQrCode); // bootstrap template drop downs $('ul.dropdown-menu li a', $('#expiration').parent()).click(updateExpiration); $('ul.dropdown-menu li a', $('#formatter').parent()).click(updateFormat); // initiate default state of checkboxes changeBurnAfterReading(); changeOpenDiscussion(); // get default values from template or fall back to set value burnAfterReadingDefault = me.getBurnAfterReading(); openDiscussionDefault = me.getOpenDiscussion(); pasteExpiration = Model.getExpirationDefault() || pasteExpiration; createButtonsDisplayed = false; viewButtonsDisplayed = false; }; return me; })(window, document); /** * Responsible for AJAX requests, transparently handles encryption… * * @name ServerInteraction * @class */ const ServerInteraction = (function () { const me = {}; let successFunc = null, failureFunc = null, symmetricKey = null, url, data, password; /** * public variable ('constant') for errors to prevent magic numbers * * @name ServerInteraction.error * @readonly * @enum {Object} */ me.error = { okay: 0, custom: 1, unknown: 2, serverError: 3 }; /** * ajaxHeaders to send in AJAX requests * * @name ServerInteraction.ajaxHeaders * @private * @readonly * @enum {Object} */ const ajaxHeaders = {'X-Requested-With': 'JSONHttpRequest'}; /** * called after successful upload * * @name ServerInteraction.success * @private * @function * @param {int} status * @param {int} result - optional */ function success(status, result) { if (successFunc !== null) { // add useful data to result result.encryptionKey = symmetricKey; successFunc(status, result); } } /** * called after a upload failure * * @name ServerInteraction.fail * @private * @function * @param {int} status - internal code * @param {int} result - original error code */ function fail(status, result) { if (failureFunc !== null) { failureFunc(status, result); } } /** * actually uploads the data * * @name ServerInteraction.run * @function */ me.run = function() { let isPost = Object.keys(data).length > 0, ajaxParams = { type: isPost ? 'POST' : 'GET', url: url, headers: ajaxHeaders, dataType: 'json', success: function(result) { if (result.status === 0) { success(0, result); } else if (result.status === 1) { fail(1, result); } else { fail(2, result); } } }; if (isPost) { ajaxParams.data = JSON.stringify(data); } $.ajax(ajaxParams).fail(function(jqXHR, textStatus, errorThrown) { console.error(textStatus, errorThrown); fail(3, jqXHR); }); }; /** * return currently set data, used in unit testing * * @name ServerInteraction.getData * @function */ me.getData = function() { return data; }; /** * set success function * * @name ServerInteraction.setUrl * @function * @param {function} newUrl */ me.setUrl = function(newUrl) { url = newUrl; }; /** * sets the password to use (first value) and optionally also the * encryption key (not recommended, it is automatically generated). * * Note: Call this after prepare() as prepare() resets these values. * * @name ServerInteraction.setCryptValues * @function * @param {string} newPassword * @param {string} newKey - optional */ me.setCryptParameters = function(newPassword, newKey) { password = newPassword; if (typeof newKey !== 'undefined') { symmetricKey = newKey; } }; /** * set success function * * @name ServerInteraction.setSuccess * @function * @param {function} func */ me.setSuccess = function(func) { successFunc = func; }; /** * set failure function * * @name ServerInteraction.setFailure * @function * @param {function} func */ me.setFailure = function(func) { failureFunc = func; }; /** * prepares a new upload * * Call this when doing a new upload to reset any data from potential * previous uploads. Must be called before any other method of this * module. * * @name ServerInteraction.prepare * @function * @return {object} */ me.prepare = function() { // entropy should already be checked! // reset password password = ''; // reset key, so it a new one is generated when it is used symmetricKey = null; // reset data successFunc = null; failureFunc = null; url = Helper.baseUri(); data = {}; }; /** * encrypts and sets the data * * @name ServerInteraction.setCipherMessage * @async * @function * @param {object} cipherMessage */ me.setCipherMessage = async function(cipherMessage) { if ( symmetricKey === null || (typeof symmetricKey === 'string' && symmetricKey === '') ) { symmetricKey = CryptTool.getSymmetricKey(); } if (!data.hasOwnProperty('adata')) { data['adata'] = []; } let cipherResult = await CryptTool.cipher(symmetricKey, password, JSON.stringify(cipherMessage), data['adata']); data['v'] = 2; data['ct'] = cipherResult[0]; data['adata'] = cipherResult[1]; }; /** * set the additional metadata to send unencrypted * * @name ServerInteraction.setUnencryptedData * @function * @param {string} index * @param {mixed} element */ me.setUnencryptedData = function(index, element) { data[index] = element; }; /** * Helper, which parses shows a general error message based on the result of the ServerInteraction * * @name ServerInteraction.parseUploadError * @function * @param {int} status * @param {object} data * @param {string} doThisThing - a human description of the action, which was tried * @return {array} */ me.parseUploadError = function(status, data, doThisThing) { let errorArray; switch (status) { case me.error.custom: errorArray = ['Could not ' + doThisThing + ': %s', data.message]; break; case me.error.unknown: errorArray = ['Could not ' + doThisThing + ': %s', I18n._('unknown status')]; break; case me.error.serverError: errorArray = ['Could not ' + doThisThing + ': %s', I18n._('server error or not responding')]; break; default: errorArray = ['Could not ' + doThisThing + ': %s', I18n._('unknown error')]; break; } return errorArray; }; return me; })(); /** * (controller) Responsible for encrypting paste and sending it to server. * * Does upload, encryption is done transparently by ServerInteraction. * * @name PasteEncrypter * @class */ const PasteEncrypter = (function () { const me = {}; /** * called after successful paste upload * * @name PasteEncrypter.showCreatedPaste * @private * @function * @param {int} status * @param {object} data */ function showCreatedPaste(status, data) { Alert.hideLoading(); Alert.hideMessages(); // show notification const baseUri = Helper.baseUri() + '?', url = baseUri + data.id + (TopNav.getBurnAfterReading() ? loadConfirmPrefix : '#') + CryptTool.base58encode(data.encryptionKey), deleteUrl = baseUri + 'pasteid=' + data.id + '&deletetoken=' + data.deletetoken; PasteStatus.createPasteNotification(url, deleteUrl); // show new URL in browser bar history.pushState({type: 'newpaste'}, document.title, url); TopNav.showViewButtons(); // this cannot be grouped with showViewButtons due to remaining time calculation TopNav.showEmailButton(); TopNav.hideRawButton(); TopNav.hideDownloadButton(); Editor.hide(); // parse and show text // (preparation already done in me.sendPaste()) PasteViewer.run(); } /** * called after successful comment upload * * @name PasteEncrypter.showUploadedComment * @private * @function * @param {int} status * @param {object} data */ function showUploadedComment(status, data) { // show success message Alert.showStatus('Comment posted.'); // reload paste Controller.refreshPaste(function () { // highlight sent comment DiscussionViewer.highlightComment(data.id, true); // reset error handler Alert.setCustomHandler(null); }); } /** * send a reply in a discussion * * @name PasteEncrypter.sendComment * @async * @function */ me.sendComment = async function() { Alert.hideMessages(); Alert.setCustomHandler(DiscussionViewer.handleNotification); // UI loading state TopNav.hideAllButtons(); Alert.showLoading('Sending comment…', 'cloud-upload'); // get data const plainText = DiscussionViewer.getReplyMessage(), nickname = DiscussionViewer.getReplyNickname(), parentid = DiscussionViewer.getReplyCommentId(); // do not send if there is no data if (plainText.length === 0) { // revert loading status… Alert.hideLoading(); Alert.setCustomHandler(null); TopNav.showViewButtons(); return; } // prepare server interaction ServerInteraction.prepare(); ServerInteraction.setCryptParameters(Prompt.getPassword(), Model.getPasteKey()); // set success/fail functions ServerInteraction.setSuccess(showUploadedComment); ServerInteraction.setFailure(function (status, data) { // revert loading status… Alert.hideLoading(); TopNav.showViewButtons(); // …show error message… Alert.showError( ServerInteraction.parseUploadError(status, data, 'post comment') ); // …and reset error handler Alert.setCustomHandler(null); }); // fill it with unencrypted params ServerInteraction.setUnencryptedData('pasteid', Model.getPasteId()); if (typeof parentid === 'undefined') { // if parent id is not set, this is the top-most comment, so use // paste id as parent, as the root element of the discussion tree ServerInteraction.setUnencryptedData('parentid', Model.getPasteId()); } else { ServerInteraction.setUnencryptedData('parentid', parentid); } // prepare cypher message let cipherMessage = { 'comment': plainText }; if (nickname.length > 0) { cipherMessage['nickname'] = nickname; } await ServerInteraction.setCipherMessage(cipherMessage).catch(Alert.showError); ServerInteraction.run(); }; /** * sends a new paste to server * * @name PasteEncrypter.sendPaste * @async * @function */ me.sendPaste = async function() { // hide previous (error) messages Controller.hideStatusMessages(); // UI loading state TopNav.hideAllButtons(); Alert.showLoading('Sending paste…', 'cloud-upload'); TopNav.collapseBar(); // get data const plainText = Editor.getText(), format = PasteViewer.getFormat(), // the methods may return different values if no files are attached (null, undefined or false) files = TopNav.getFileList() || AttachmentViewer.getFile() || AttachmentViewer.hasAttachment(); // do not send if there is no data if (plainText.length === 0 && !files) { // revert loading status… Alert.hideLoading(); TopNav.showCreateButtons(); return; } // prepare server interaction ServerInteraction.prepare(); ServerInteraction.setCryptParameters(TopNav.getPassword()); // set success/fail functions ServerInteraction.setSuccess(showCreatedPaste); ServerInteraction.setFailure(function (status, data) { // revert loading status… Alert.hideLoading(); TopNav.showCreateButtons(); // show error message Alert.showError( ServerInteraction.parseUploadError(status, data, 'create paste') ); }); // fill it with unencrypted submitted options ServerInteraction.setUnencryptedData('adata', [ null, format, TopNav.getOpenDiscussion() ? 1 : 0, TopNav.getBurnAfterReading() ? 1 : 0 ]); ServerInteraction.setUnencryptedData('meta', {'expire': TopNav.getExpiration()}); // prepare PasteViewer for later preview PasteViewer.setText(plainText); PasteViewer.setFormat(format); // prepare cypher message let file = AttachmentViewer.getAttachmentData(), cipherMessage = { 'paste': plainText }; if (typeof file !== 'undefined' && file !== null) { cipherMessage['attachment'] = file; cipherMessage['attachment_name'] = AttachmentViewer.getFile().name; } else if (AttachmentViewer.hasAttachment()) { // fall back to cloned part let attachment = AttachmentViewer.getAttachment(); cipherMessage['attachment'] = attachment[0]; cipherMessage['attachment_name'] = attachment[1]; // we need to retrieve data from blob if browser already parsed it in memory if (typeof attachment[0] === 'string' && attachment[0].startsWith('blob:')) { Alert.showStatus( [ 'Retrieving cloned file \'%s\' from memory...', attachment[1] ], 'copy' ); try { const blobData = await $.ajax({ type: 'GET', url: `${attachment[0]}`, processData: false, timeout: 10000, xhrFields: { withCredentials: false, responseType: 'blob' } }); if (blobData instanceof window.Blob) { const fileReading = new Promise(function(resolve, reject) { const fileReader = new FileReader(); fileReader.onload = function (event) { resolve(event.target.result); }; fileReader.onerror = function (error) { reject(error); } fileReader.readAsDataURL(blobData); }); cipherMessage['attachment'] = await fileReading; } else { const error = 'Cannot process attachment data.'; Alert.showError(error); throw new TypeError(error); } } catch (error) { console.error(error); Alert.showError('Cannot retrieve attachment.'); throw error; } } } // encrypt message await ServerInteraction.setCipherMessage(cipherMessage).catch(Alert.showError); // send data ServerInteraction.run(); }; return me; })(); /** * (controller) Responsible for decrypting cipherdata and passing data to view. * * Only decryption, no download. * * @name PasteDecrypter * @class */ const PasteDecrypter = (function () { const me = {}; /** * decrypt data or prompts for password in case of failure * * @name PasteDecrypter.decryptOrPromptPassword * @private * @async * @function * @param {string} key * @param {string} password - optional, may be an empty string * @param {string} cipherdata * @throws {string} * @return {false|string} false, when unsuccessful or string (decrypted data) */ async function decryptOrPromptPassword(key, password, cipherdata) { // try decryption without password const plaindata = await CryptTool.decipher(key, password, cipherdata); // if it fails, request password if (plaindata.length === 0 && password.length === 0) { // show prompt Prompt.requestPassword(); // 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 if (plaindata.length === 0) { return false; } return plaindata; } /** * decrypt the actual paste text * * @name PasteDecrypter.decryptPaste * @private * @async * @function * @param {Paste} paste - paste data in object form * @param {string} key * @param {string} password * @throws {string} * @return {Promise} */ async function decryptPaste(paste, key, password) { let pastePlain = await decryptOrPromptPassword( key, password, paste.getCipherData() ); if (pastePlain === false) { if (password.length === 0) { throw 'waiting on user to provide a password'; } else { Alert.hideLoading(); // reset password, so it can be re-entered Prompt.reset(); TopNav.showRetryButton(); throw 'Could not decrypt data. Did you enter a wrong password? Retry with the button at the top.'; } } if (paste.v > 1) { // version 2 paste const pasteMessage = JSON.parse(pastePlain); if (pasteMessage.hasOwnProperty('attachment') && pasteMessage.hasOwnProperty('attachment_name')) { AttachmentViewer.setAttachment(pasteMessage.attachment, pasteMessage.attachment_name); AttachmentViewer.showAttachment(); } pastePlain = pasteMessage.paste; } else { // version 1 paste if (paste.hasOwnProperty('attachment') && paste.hasOwnProperty('attachmentname')) { Promise.all([ CryptTool.decipher(key, password, paste.attachment), CryptTool.decipher(key, password, paste.attachmentname) ]).then((attachment) => { AttachmentViewer.setAttachment(attachment[0], attachment[1]); AttachmentViewer.showAttachment(); }); } } PasteViewer.setFormat(paste.getFormat()); PasteViewer.setText(pastePlain); PasteViewer.run(); } /** * decrypts all comments and shows them * * @name PasteDecrypter.decryptComments * @private * @async * @function * @param {Paste} paste - paste data in object form * @param {string} key * @param {string} password * @return {Promise} */ async function decryptComments(paste, key, password) { // remove potential previous discussion DiscussionViewer.prepareNewDiscussion(); const commentDecryptionPromises = []; // iterate over comments for (let i = 0; i < paste.comments.length; ++i) { const comment = new Comment(paste.comments[i]), commentPromise = CryptTool.decipher(key, password, comment.getCipherData()); paste.comments[i] = comment; if (comment.v > 1) { // version 2 comment commentDecryptionPromises.push( commentPromise.then(function (commentJson) { const commentMessage = JSON.parse(commentJson); return [ commentMessage.comment || '', commentMessage.nickname || '' ]; }) ); } else { // version 1 comment commentDecryptionPromises.push( Promise.all([ commentPromise, paste.comments[i].meta.hasOwnProperty('nickname') ? CryptTool.decipher(key, password, paste.comments[i].meta.nickname) : Promise.resolve('') ]) ); } } return Promise.all(commentDecryptionPromises).then(function (plaintexts) { for (let i = 0; i < paste.comments.length; ++i) { if (plaintexts[i][0].length === 0) { continue; } DiscussionViewer.addComment( paste.comments[i], plaintexts[i][0], plaintexts[i][1] ); } }); } /** * show decrypted text in the display area, including discussion (if open) * * @name PasteDecrypter.run * @function * @param {Paste} [paste] - (optional) object including comments to display (items = array with keys ('data','meta')) */ me.run = function(paste) { Alert.hideMessages(); Alert.showLoading('Decrypting paste…', 'cloud-download'); if (typeof paste === 'undefined' || paste.type === 'click') { // get cipher data and wait until it is available Model.getPasteData(me.run); return; } let key = Model.getPasteKey(), password = Prompt.getPassword(), decryptionPromises = []; TopNav.setRetryCallback(function () { TopNav.hideRetryButton(); me.run(paste); }); // decrypt paste & attachments decryptionPromises.push(decryptPaste(paste, key, password)); // if the discussion is opened on this paste, display it if (paste.isDiscussionEnabled()) { decryptionPromises.push(decryptComments(paste, key, password)); } // shows the remaining time (until) deletion PasteStatus.showRemainingTime(paste); Promise.all(decryptionPromises) .then(() => { Alert.hideLoading(); TopNav.showViewButtons(); // discourage cloning (it cannot really be prevented) if (paste.isBurnAfterReadingEnabled()) { TopNav.hideBurnAfterReadingButtons(); } else { // we have to pass in remaining_time here TopNav.showEmailButton(paste.getTimeToLive()); } // only offer adding comments, after paste was successfully decrypted if (paste.isDiscussionEnabled()) { DiscussionViewer.finishDiscussion(); } }) .catch((err) => { // wait for the user to type in the password, // then PasteDecrypter.run will be called again Alert.showError(err); }); }; return me; })(); /** * (controller) main PrivateBin logic * * @name Controller * @param {object} window * @param {object} document * @class */ const Controller = (function (window, document) { const me = {}; /** * hides all status messages no matter which module showed them * * @name Controller.hideStatusMessages * @function */ me.hideStatusMessages = function() { PasteStatus.hideMessages(); Alert.hideMessages(); }; /** * creates a new paste * * @name Controller.newPaste * @function */ me.newPaste = function() { // Important: This *must not* run Alert.hideMessages() as previous // errors from viewing a paste should be shown. TopNav.hideAllButtons(); Alert.showLoading('Preparing new paste…', 'time'); PasteStatus.hideMessages(); PasteViewer.hide(); Editor.resetInput(); Editor.show(); Editor.focusInput(); AttachmentViewer.removeAttachment(); TopNav.resetInput(); TopNav.showCreateButtons(); // newPaste could be called when user is on paste clone editing view TopNav.hideCustomAttachment(); AttachmentViewer.clearDragAndDrop(); AttachmentViewer.removeAttachmentData(); Alert.hideLoading(); // only push new state if we are coming from a different one if (Helper.baseUri() != window.location) { history.pushState({type: 'create'}, document.title, Helper.baseUri()); } // clear discussion DiscussionViewer.prepareNewDiscussion(); }; /** * shows the loaded paste * * @name Controller.showPaste * @function */ me.showPaste = function() { try { Model.getPasteKey(); } catch (err) { console.error(err); // missing decryption key (or paste ID) in URL? if (window.location.hash.length === 0) { Alert.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; } } // check if we should request loading confirmation if(window.location.hash.startsWith(loadConfirmPrefix)) { Prompt.requestLoadConfirmation(); return; } // show proper elements on screen PasteDecrypter.run(); }; /** * refreshes the loaded paste to show potential new data * * @name Controller.refreshPaste * @function * @param {function} callback */ me.refreshPaste = function(callback) { // save window position to restore it later const orgPosition = $(window).scrollTop(); Model.getPasteData(function (data) { ServerInteraction.prepare(); ServerInteraction.setUrl(Helper.baseUri() + '?pasteid=' + Model.getPasteId()); ServerInteraction.setFailure(function (status, data) { // revert loading status… Alert.hideLoading(); TopNav.showViewButtons(); // show error message Alert.showError( ServerInteraction.parseUploadError(status, data, 'refresh display') ); }); ServerInteraction.setSuccess(function (status, data) { PasteDecrypter.run(new Paste(data)); // restore position window.scrollTo(0, orgPosition); // NOTE: could create problems as callback may be called // asyncronously if PasteDecrypter e.g. needs to wait for a // password being entered callback(); }); ServerInteraction.run(); }, false); // this false is important as it circumvents the cache } /** * clone the current paste * * @name Controller.clonePaste * @function */ me.clonePaste = function() { TopNav.collapseBar(); TopNav.hideAllButtons(); // hide messages from previous paste me.hideStatusMessages(); // erase the id and the key in url history.pushState({type: 'clone'}, document.title, Helper.baseUri()); if (AttachmentViewer.hasAttachment()) { AttachmentViewer.moveAttachmentTo( TopNav.getCustomAttachment(), 'Cloned: \'%s\'' ); TopNav.hideFileSelector(); AttachmentViewer.hideAttachment(); // NOTE: it also looks nice without removing the attachment // but for a consistent display we remove it… AttachmentViewer.hideAttachmentPreview(); TopNav.showCustomAttachment(); // show another status message to make the user aware that the // file was cloned too! Alert.showStatus( [ 'The cloned file \'%s\' was attached to this paste.', AttachmentViewer.getAttachment()[1] ], 'copy' ); } Editor.setText(PasteViewer.getText()); // also clone the format TopNav.setFormat(PasteViewer.getFormat()); PasteViewer.hide(); Editor.show(); TopNav.showCreateButtons(); // clear discussion DiscussionViewer.prepareNewDiscussion(); }; /** * try initializing zlib or display a warning if it fails, * extracted from main init to allow unit testing * * @name Controller.initZ * @function */ me.initZ = function() { z = zlib.catch(function () { if ($('body').data('compression') !== 'none') { Alert.showWarning('Your browser doesn\'t support WebAssembly, used for zlib compression. You can create uncompressed documents, but can\'t read compressed ones.'); } }); } /** * application start * * @name Controller.init * @function */ me.init = function() { // first load translations I18n.loadTranslations(); // Add a hook to make all links open a new window DOMPurify.addHook('afterSanitizeAttributes', function(node) { // set all elements owning target to target=_blank if ('target' in node && node.id !== 'pasteurl') { node.setAttribute('target', '_blank'); } // set non-HTML/MathML links to xlink:show=new if (!node.hasAttribute('target') && (node.hasAttribute('xlink:href') || node.hasAttribute('href'))) { node.setAttribute('xlink:show', 'new'); } if ('rel' in node) { node.setAttribute('rel', 'nofollow noopener noreferrer'); } }); // center all modals $('.modal').on('show.bs.modal', function(e) { $(e.target).css({ display: 'flex' }); }); // initialize other modules/"classes" Alert.init(); Model.init(); AttachmentViewer.init(); DiscussionViewer.init(); Editor.init(); PasteStatus.init(); PasteViewer.init(); Prompt.init(); TopNav.init(); UiHelper.init(); // check for legacy browsers before going any further if (!Legacy.Check.getInit()) { // Legacy check didn't complete, wait and try again setTimeout(init, 500); return; } if (!Legacy.Check.getStatus()) { // something major is wrong, stop right away return; } me.initZ(); // if delete token is passed (i.e. paste has been deleted by this // access), there is nothing more to do if (Model.hasDeleteToken()) { return; } // check whether existing paste needs to be shown try { Model.getPasteId(); } catch (e) { // otherwise create a new paste return me.newPaste(); } // always reload on back button to invalidate cache(protect burn after read paste) window.addEventListener('popstate', () => { window.location.reload(); }); // display an existing paste return me.showPaste(); } return me; })(window, document); return { Helper: Helper, I18n: I18n, CryptTool: CryptTool, Model: Model, UiHelper: UiHelper, Alert: Alert, PasteStatus: PasteStatus, Prompt: Prompt, Editor: Editor, PasteViewer: PasteViewer, AttachmentViewer: AttachmentViewer, DiscussionViewer: DiscussionViewer, TopNav: TopNav, ServerInteraction: ServerInteraction, PasteEncrypter: PasteEncrypter, PasteDecrypter: PasteDecrypter, Controller: Controller }; })(jQuery, RawDeflate);