├── README.md ├── greatidea.txt ├── webserver.js ├── screen.css ├── index.html ├── steg-of-the-dump.js └── jquery-1.11.0.min.js /README.md: -------------------------------------------------------------------------------- 1 | Steg Of The Dump 2 | ================ 3 | 4 | A way of hiding messages in messages, typically for use on Twitter. 5 | 6 | Text steganography in JavaScript. 7 | 8 | Demo 9 | -------------------------------------------------------------------------------- /greatidea.txt: -------------------------------------------------------------------------------- 1 | Great ⅰdea Mark, Matt &I should totally haνe anοther kid right now 2 | Great ⅰdea Mark, Matt &I should totally haνe anοther kid right now 3 | Great ⅰdea Mark, Matt &I should totally haνe anοther kid right now 4 | Great ⅰdea Mark, Matt &I should totally haνe anοther kid right now 5 | Great ⅰdea Mark, Matt &Ishоuldtotallyhaveanother kid right now 6 | Great ⅰdea Mark, Matt &I should totally haνe anοther kid right now 7 | -------------------------------------------------------------------------------- /webserver.js: -------------------------------------------------------------------------------- 1 | // Note: Useful only for debug purposes when using desktop browsers. 2 | var http = require("http"), 3 | url = require("url"), 4 | path = require("path"), 5 | fs = require("fs"), 6 | port = process.argv[2] || 8888; 7 | 8 | http.createServer(function(request, response) { 9 | var uri = url.parse(request.url).pathname, 10 | filename = path.join(process.cwd(), uri).replace(/%20/g, ' '); 11 | 12 | path.exists(filename, function(exists) { 13 | if(!exists) { 14 | response.writeHead(404, {"Content-Type": "text/plain"}); 15 | response.write("404 Not Found\n"); 16 | response.end(); 17 | return; 18 | } 19 | if (fs.statSync(filename).isDirectory()) filename += '/index.html'; 20 | fs.readFile(filename, "binary", function(err, file) { 21 | if(err) { 22 | response.writeHead(500, { 23 | "Content-Type": "text/plain" 24 | }); 25 | response.write(err + "\n"); 26 | response.end(); 27 | return; 28 | } 29 | response.writeHead(200); 30 | response.write(file, "binary"); 31 | response.end(); 32 | }); 33 | }); 34 | }).listen(parseInt(port, 10)); 35 | 36 | console.log("Static file server running at\n => http://localhost:" + port + "/\nCTRL + C to shutdown"); -------------------------------------------------------------------------------- /screen.css: -------------------------------------------------------------------------------- 1 | html { 2 | font-family: 'Raleway', Ubuntu,sans-serif; 3 | } 4 | 5 | body { 6 | background: #eeeeee; 7 | } 8 | 9 | h1 { 10 | padding-top:1em; 11 | margin-top:0em; 12 | padding-left:0.4em; 13 | } 14 | 15 | h2 { 16 | padding-top:1em; 17 | margin-top:1em; 18 | padding-left:0.7em; 19 | clear:left; 20 | } 21 | 22 | h3 { 23 | margin-left:1em; 24 | } 25 | 26 | p { 27 | padding-left: 1em; 28 | } 29 | 30 | #encode fieldset { 31 | width:30%; 32 | display:inline-block; 33 | } 34 | 35 | #decode fieldset { 36 | width:47%; 37 | display:inline-block; 38 | } 39 | 40 | 41 | #encode_result_status { 42 | display:none; 43 | background: #ffeeee; 44 | font-size:small; 45 | font-weight:bold; 46 | width:31%; 47 | float:right; 48 | margin-right:5%; 49 | } 50 | 51 | 52 | fieldset { 53 | border: solid 1px #cccccc; 54 | background: white; 55 | } 56 | 57 | fieldset.unable-to-cover-text, 58 | fieldset.unable-to-cover-text textarea { 59 | background: #ffeeee; 60 | } 61 | 62 | 63 | textarea { 64 | width: 100%; 65 | height:4em; 66 | resize: none; 67 | border: none; 68 | } 69 | 70 | footer { 71 | margin-top:100px; 72 | border-top: solid 1px #ddd; 73 | padding:0.5em 0px 1em 0px; 74 | color: #666; 75 | } 76 | 77 | 78 | footer p { 79 | font-size:small; 80 | padding-left:1em; 81 | } 82 | 83 | footer a { 84 | color: #666; 85 | } 86 | -------------------------------------------------------------------------------- /index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 |
4 |Hide secret messages in your tweets (or any text) with steg-of-the-dump.js.
24 | 25 |Warning: Not all of Hidden Message stored in tweet. Add more text (e.g. spaces) to Tweet, or reduce text in Hidden Message.
41 |The letters of your tweet are replaced with similar looking letters (Unicode homoglyphs) that are used to hide your hidden message.
57 |I know, groundbreaking stuff.
59 |Not really, because anyone who knows to look for your message can find it. It's more like writing <!-- hidden comments -->.
61 |Sort of. If nothing corrupts the text it will work, and it should work on Twitter and in emails. Facebook will probably corrupt the text however.
63 |Your hidden message may only contain these characters: (-bit charset). This is done so that we can store more hidden messages.
65 |If you want more text then perhaps include a lowercase url (e.g. from tinyurl.com)
66 |If you can't decode your message check that you copied it correctly from the start to the end, and that you didn't copy any extra characters.
68 |Next, if entire tweet is still corrupt then you can try manually recovering it. I know this is annoying but there are technical reasons why this is the case (for techy reasoning - click here).
69 | 70 |To attempt to recover the tweet first try adding spaces at the beginning of the tweet. This will help realign the -bit boundary. If the tweet is only corrupt in the middle then try adding spaces to that area of the tweet. Good luck!
71 | 72 | 76 | 77 | -------------------------------------------------------------------------------- /steg-of-the-dump.js: -------------------------------------------------------------------------------- 1 | (function($){ 2 | "use strict"; 3 | 4 | var $encode_tweet, $encode_secret, $encode_result, $tweet_length, $encode_result_status, $hidden_length, $hidden_message_length, 5 | $decode_tweet, $decode_secret, 6 | maxlength = 140, 7 | 8 | init = function(){ 9 | $encode_tweet = $("#encode_tweet") .keyup(encode_update).keypress(encode_update).change(encode_update); 10 | $encode_secret = $("#encode_secret").keyup(encode_secret_update).keypress(encode_update).change(encode_update).blur(set_to_lowercase); 11 | $encode_result = $("#encode_result").focus(only_allow_selection); 12 | $decode_tweet = $("#decode_tweet") .keyup(decode_update).change(decode_update); 13 | $decode_secret = $("#decode_secret").focus(only_allow_selection); 14 | $tweet_length = $("#tweet_length"); 15 | $hidden_length = $("#hidden_length"); 16 | $hidden_message_length = $("#hidden_message_length"); 17 | $encode_result_status = $("#encode_result_status"); 18 | secret_alphabet_bitlength = secret_alphabet.length.toString(2).length; 19 | update_homoglyph_lookup(); 20 | encode_update(); 21 | $decode_tweet.val($encode_result.val()); 22 | decode_update(); 23 | 24 | $("#valid_hidden_message_characters").text(secret_alphabet_string); 25 | $(".secret_alphabet_bitlength").text(secret_alphabet_bitlength); 26 | }, 27 | encode_tweet_update = function(){ 28 | encode_update(); 29 | }, 30 | encode_secret_update = function(event){ 31 | var character_code = event.which, 32 | character = String.fromCharCode(character_code).toLowerCase(); 33 | 34 | if(secret_alphabet.indexOf(character) === -1 && editing_keys.indexOf(character_code) === -1) { 35 | event.preventDefault(); 36 | return; 37 | } 38 | encode_update(); 39 | }, 40 | encode_update = function(){ 41 | var tweet = $encode_tweet.val(), 42 | secret = $encode_secret.val().toLowerCase() + " ", 43 | secret_binary = "", 44 | character, 45 | character_code_in_decimal, 46 | character_code_in_hexadecimal, 47 | secret_alphabet_index, 48 | secret_character_binary, 49 | result = "", 50 | homoglyph, 51 | homoglyph_options, 52 | homoglyph_options_bitlength, 53 | secret_binary_to_encode, 54 | secret_binary_to_encode_in_decimal, 55 | tweet_covertext_chars = 0, 56 | i; 57 | 58 | //if(tweet.length < maxlength && maxlength - tweet.length > 0) { 59 | // tweet += new Array(maxlength - tweet.length).join(" "); 60 | //} 61 | 62 | for(i = 0; i < secret.length; i++){ 63 | character = secret[i]; 64 | secret_alphabet_index = secret_alphabet.indexOf(character); 65 | if(secret_alphabet_index >= 0) { 66 | secret_character_binary = zeropad(secret_alphabet_index.toString(2), secret_alphabet_bitlength); 67 | if(secret_character_binary.length !== secret_alphabet_bitlength) { 68 | console.log("ERROR: binary representation of character too big!", secret_alphabet_index.toString(2), " zeropadded to ", zeropad(secret_alphabet_index.toString(2), secret_alphabet_bitlength)); 69 | } 70 | secret_binary += secret_character_binary; 71 | } else { 72 | console.log("ERROR: secret contains invalid character '" + character + "' Ignored."); 73 | } 74 | } 75 | 76 | secret_binary = ensure_secret_binary_divisible_by_alphabet_bitlength(secret_binary); 77 | 78 | for(i = 0; i < tweet.length; i++){ 79 | character = tweet[i]; 80 | homoglyph = homoglyphs[character]; 81 | if(homoglyph !== undefined){ 82 | homoglyph_options = homoglyph.slice(0); 83 | homoglyph_options_bitlength = (homoglyph_options.length + 1).toString(2).length - 1; 84 | tweet_covertext_chars += homoglyph_options_bitlength; 85 | if(secret_binary.length > 0){ 86 | secret_binary_to_encode = secret_binary.substr(0, homoglyph_options_bitlength); 87 | //if(secret_binary_to_encode.length < secret_alphabet_bitlength) { 88 | // secret_binary_to_encode = zeropad(secret_binary_to_encode, secret_alphabet_bitlength); 89 | //} 90 | secret_binary = secret_binary.substr(homoglyph_options_bitlength); 91 | secret_binary_to_encode_in_decimal = parseInt(secret_binary_to_encode, 2); 92 | if(secret_binary_to_encode_in_decimal > 0) { 93 | character_code_in_hexadecimal = homoglyph_options[secret_binary_to_encode_in_decimal - 1]; 94 | character_code_in_decimal = parseInt(character_code_in_hexadecimal, 16); 95 | character = String.fromCharCode(character_code_in_decimal); 96 | } 97 | //console.log("Encoding ", secret_binary_to_encode, " by making ", tweet[i], "(" + tweet.charCodeAt(i) + ") into ", character + " (" + character.charCodeAt(0) + ").", homoglyph_options); 98 | } 99 | } 100 | result += character; 101 | } 102 | 103 | if(secret_binary.length > 0) { 104 | $encode_result.parent().addClass("unable-to-cover-text"); 105 | $encode_result_status.show(); 106 | } else { 107 | $encode_result.parent().removeClass("unable-to-cover-text"); 108 | $encode_result_status.hide(); 109 | } 110 | $encode_result.val(result); 111 | $decode_tweet.val(result); 112 | $tweet_length.text(" (length: " + result.length + ")"); 113 | $hidden_message_length.text(" (length: " + secret.length + ")") 114 | $hidden_length.text(" (allows Hidden Message length " + Math.ceil(tweet_covertext_chars / secret_alphabet_bitlength) + ")"); 115 | decode_update(); 116 | }, 117 | ensure_secret_binary_divisible_by_alphabet_bitlength = function(secret_binary){ 118 | if(secret_binary % secret_alphabet_bitlength > 0) { 119 | secret_binary += zeropad("0", secret_alphabet_bitlength - (secret_binary % secret_alphabet_bitlength)); 120 | } 121 | return secret_binary; 122 | }, 123 | set_to_lowercase = function(){ 124 | $(this).val($(this).val().toLowerCase()); 125 | }, 126 | only_allow_selection = function(){ 127 | var $this = $(this); 128 | 129 | $this.select(); 130 | $this.mouseup(function() { 131 | $this.unbind("mouseup"); 132 | return false; 133 | }); 134 | }, 135 | decode_update = function(){ 136 | var tweet = $decode_tweet.val(), 137 | character, 138 | character_code, 139 | secret_binary = "", 140 | secret_character_in_binary, 141 | secret_character_in_decimal, 142 | secret_character, 143 | result = "", 144 | i; 145 | 146 | //console.log(homoglyphs_lookup); 147 | for(i = 0; i < tweet.length; i++){ 148 | character = tweet.substr(i, 1); 149 | if(homoglyphs_lookup[character]) { 150 | secret_binary += homoglyphs_lookup[character]; 151 | } 152 | } 153 | 154 | secret_binary = ensure_secret_binary_divisible_by_alphabet_bitlength(secret_binary); 155 | 156 | 157 | //console.log(secret_binary); 158 | 159 | while(secret_binary.length > 0){ 160 | secret_character_in_binary = secret_binary.substr(0, secret_alphabet_bitlength); 161 | if(secret_character_in_binary.length > 0) { 162 | secret_character_in_binary = zeropad(secret_character_in_binary, secret_alphabet_bitlength); 163 | if(secret_character_in_binary.length !== secret_alphabet_bitlength) { 164 | console.log("ERROR: Unable to extract 5 characters (zeropadded) from string. ", secret_binary.substr(i, secret_alphabet_bitlength), zeropad(secret_binary.substr(i, secret_alphabet_bitlength), secret_alphabet_bitlength)); 165 | } 166 | secret_character_in_decimal = parseInt(secret_character_in_binary, 2); 167 | if(secret_alphabet[secret_character_in_decimal]) { 168 | result += secret_alphabet[secret_character_in_decimal]; 169 | } else { 170 | //console.log("ERROR: Unable to find secret alphabet character at position", secret_character_in_decimal); 171 | } 172 | } 173 | secret_binary = secret_binary.substr(secret_alphabet_bitlength); 174 | } 175 | 176 | $decode_secret.val(result); 177 | }, 178 | zeropad = function(value, length){ 179 | return (new Array(length).join("0") + value).substr(-length, length); 180 | }, 181 | editing_keys = [8, 46], // backspace, delete etc 182 | secret_alphabet_string = " abcdefghijklmnopqrstuvwxyz123456789'0.:/\\%-_?&;", 183 | secret_alphabet = secret_alphabet_string.split(""), 184 | secret_alphabet_bitlength, 185 | homoglyphs_lookup, 186 | update_homoglyph_lookup = function(){ 187 | homoglyphs_lookup = {}; 188 | 189 | $.each(homoglyphs, function(character, homoglyph_options){ 190 | var i, 191 | homoglyph_option, 192 | homoglyph_option_character, 193 | homoglyph_options_bitlength; 194 | 195 | homoglyph_options_bitlength = (homoglyph_options.length + 1).toString(2).length - 1; 196 | 197 | homoglyphs_lookup[character] = zeropad("0", homoglyph_options_bitlength); 198 | 199 | for(i = 0; i < homoglyph_options.length; i++){ 200 | homoglyph_option = homoglyph_options[i]; 201 | homoglyph_option_character = String.fromCharCode(parseInt(homoglyph_option, 16)); 202 | homoglyphs_lookup[homoglyph_option_character] = zeropad((i + 1).toString(2), homoglyph_options_bitlength); 203 | } 204 | }); 205 | }, 206 | homoglyphs = { 207 | "!":["FF01"], 208 | '"':["FF02"], 209 | "$":["FF04"], 210 | "%":["FF05"], 211 | "&":["FF06"], 212 | "'":["FF07"], 213 | "(":["FF08"], 214 | ")":["FF09"], 215 | "*":["FF0A"], 216 | "+":["FF0B"], 217 | ",":["FF0C"], 218 | "-":["FF0D"], 219 | ".":["FF0E"], 220 | "/":["FF0F"], 221 | "0":["FF10"], 222 | "1":["FF11"], 223 | "2":["FF12"], 224 | "3":["FF13"], 225 | "4":["FF14"], 226 | "5":["FF15"], 227 | "6":["FF16"], 228 | "7":["FF17"], 229 | "8":["FF18"], 230 | "9":["FF19"], 231 | ":":["FF1A"], 232 | ";":["FF1B"], 233 | "<":["FF1C"], 234 | "=":["FF1D"], 235 | ">":["FF1E"], 236 | "?":["FF1F"], 237 | "@":["FF20"], 238 | "A":["FF21","0391","0410"], 239 | "B":["FF22","0392","0412"], 240 | "C":["FF23","03F9","216D"], 241 | "D":["FF24"], 242 | "E":["FF25","0395","0415"], 243 | "F":["FF26"], 244 | "G":["FF27"], 245 | "H":["FF28","0397","041D"], 246 | "I":["FF29","0399","0406"], 247 | "J":["FF2A"], 248 | "K":["FF2B","039A","212A"], 249 | "L":["FF2C"], 250 | "M":["FF2D","039C","041C"], 251 | "N":["FF2E"], 252 | "O":["FF2F","039F","041E"], 253 | "P":["FF30","03A1","0420"], 254 | "Q":["FF31"], 255 | "R":["FF32"], 256 | "S":["FF33"], 257 | "T":["FF34","03A4","0422"], 258 | "U":["FF35"], 259 | "V":["FF36","0474","2164"], 260 | "W":["FF37"], 261 | "X":["FF38","03A7","2169"], 262 | "Y":["FF39","03A5","04AE"], 263 | "Z":["FF3A"], 264 | "[":["FF3B"], 265 | "\\":["FF3C"], 266 | "]":["FF3D"], 267 | "^":["FF3E"], 268 | "_":["FF3F"], 269 | "`":["FF40"], 270 | "a":["FF41"], 271 | "b":["FF42"], 272 | "c":["FF43","03F2","0441"], 273 | "d":["FF44"], 274 | "e":["FF45"], 275 | "f":["FF46"], 276 | "g":["FF47"], 277 | "h":["FF48"], 278 | "i":["FF49","0456","2170"], 279 | "j":["FF4A"], 280 | "k":["FF4B"], 281 | "l":["FF4C"], 282 | "m":["FF4D"], 283 | "n":["FF4E"], 284 | "o":["FF4F","03BF","043E"], 285 | "p":["FF50"], 286 | "q":["FF51"], 287 | "r":["FF52"], 288 | "s":["FF53"], 289 | "t":["FF54"], 290 | "u":["FF55"], 291 | "v":["FF56","03BD","2174"], 292 | "w":["FF57"], 293 | "x":["FF58","0445","2179"], 294 | "y":["FF59"], 295 | "z":["FF5A"], 296 | "{":["FF5B"], 297 | "|":["FF5C"], 298 | "}":["FF5D"], 299 | "~":["FF5E"], 300 | " 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