1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/devtools/jint/sunspider/crypto-aes.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,494 @@
1.4 +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
1.5 +
1.6 +/*
1.7 + * AES Cipher function: encrypt 'input' with Rijndael algorithm
1.8 + *
1.9 + * takes byte-array 'input' (16 bytes)
1.10 + * 2D byte-array key schedule 'w' (Nr+1 x Nb bytes)
1.11 + *
1.12 + * applies Nr rounds (10/12/14) using key schedule w for 'add round key' stage
1.13 + *
1.14 + * returns byte-array encrypted value (16 bytes)
1.15 + */
1.16 +function Cipher(input, w) { // main Cipher function [§5.1]
1.17 + var Nb = 4; // block size (in words): no of columns in state (fixed at 4 for AES)
1.18 + var Nr = w.length/Nb - 1; // no of rounds: 10/12/14 for 128/192/256-bit keys
1.19 +
1.20 + var state = [[],[],[],[]]; // initialise 4xNb byte-array 'state' with input [§3.4]
1.21 + /* BEGIN LOOP */
1.22 + for (var i=0; i<4*Nb; i++) state[i%4][Math.floor(i/4)] = input[i];
1.23 + /* END LOOP */
1.24 +
1.25 + state = AddRoundKey(state, w, 0, Nb);
1.26 +
1.27 + /* BEGIN LOOP */
1.28 + for (var round=1; round<Nr; round++) {
1.29 + state = SubBytes(state, Nb);
1.30 + state = ShiftRows(state, Nb);
1.31 + state = MixColumns(state, Nb);
1.32 + state = AddRoundKey(state, w, round, Nb);
1.33 + }
1.34 + /* END LOOP */
1.35 +
1.36 + state = SubBytes(state, Nb);
1.37 + state = ShiftRows(state, Nb);
1.38 + state = AddRoundKey(state, w, Nr, Nb);
1.39 +
1.40 + var output = new Array(4*Nb); // convert state to 1-d array before returning [§3.4]
1.41 + /* BEGIN LOOP */
1.42 + for (var i=0; i<4*Nb; i++) output[i] = state[i%4][Math.floor(i/4)];
1.43 + /* END LOOP */
1.44 + return output;
1.45 +}
1.46 +
1.47 +
1.48 +function SubBytes(s, Nb) { // apply SBox to state S [§5.1.1]
1.49 + /* BEGIN LOOP */
1.50 + for (var r=0; r<4; r++) {
1.51 + /* BEGIN LOOP */
1.52 + for (var c=0; c<Nb; c++) s[r][c] = Sbox[s[r][c]];
1.53 + /* END LOOP */
1.54 + }
1.55 + /* END LOOP */
1.56 + return s;
1.57 +}
1.58 +
1.59 +
1.60 +function ShiftRows(s, Nb) { // shift row r of state S left by r bytes [§5.1.2]
1.61 + var t = new Array(4);
1.62 + /* BEGIN LOOP */
1.63 + for (var r=1; r<4; r++) {
1.64 + /* BEGIN LOOP */
1.65 + for (var c=0; c<4; c++) t[c] = s[r][(c+r)%Nb]; // shift into temp copy
1.66 + /* END LOOP */
1.67 + /* BEGIN LOOP */
1.68 + for (var c=0; c<4; c++) s[r][c] = t[c]; // and copy back
1.69 + /* END LOOP */
1.70 + } // note that this will work for Nb=4,5,6, but not 7,8 (always 4 for AES):
1.71 + /* END LOOP */
1.72 + return s; // see fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.311.pdf
1.73 +}
1.74 +
1.75 +
1.76 +function MixColumns(s, Nb) { // combine bytes of each col of state S [§5.1.3]
1.77 + /* BEGIN LOOP */
1.78 + for (var c=0; c<4; c++) {
1.79 + var a = new Array(4); // 'a' is a copy of the current column from 's'
1.80 + var b = new Array(4); // 'b' is a•{02} in GF(2^8)
1.81 + /* BEGIN LOOP */
1.82 + for (var i=0; i<4; i++) {
1.83 + a[i] = s[i][c];
1.84 + b[i] = s[i][c]&0x80 ? s[i][c]<<1 ^ 0x011b : s[i][c]<<1;
1.85 + }
1.86 + /* END LOOP */
1.87 + // a[n] ^ b[n] is a•{03} in GF(2^8)
1.88 + s[0][c] = b[0] ^ a[1] ^ b[1] ^ a[2] ^ a[3]; // 2*a0 + 3*a1 + a2 + a3
1.89 + s[1][c] = a[0] ^ b[1] ^ a[2] ^ b[2] ^ a[3]; // a0 * 2*a1 + 3*a2 + a3
1.90 + s[2][c] = a[0] ^ a[1] ^ b[2] ^ a[3] ^ b[3]; // a0 + a1 + 2*a2 + 3*a3
1.91 + s[3][c] = a[0] ^ b[0] ^ a[1] ^ a[2] ^ b[3]; // 3*a0 + a1 + a2 + 2*a3
1.92 + }
1.93 + /* END LOOP */
1.94 + return s;
1.95 +}
1.96 +
1.97 +
1.98 +function AddRoundKey(state, w, rnd, Nb) { // xor Round Key into state S [§5.1.4]
1.99 + /* BEGIN LOOP */
1.100 + for (var r=0; r<4; r++) {
1.101 + /* BEGIN LOOP */
1.102 + for (var c=0; c<Nb; c++) state[r][c] ^= w[rnd*4+c][r];
1.103 + /* END LOOP */
1.104 + }
1.105 + /* END LOOP */
1.106 + return state;
1.107 +}
1.108 +
1.109 +
1.110 +function KeyExpansion(key) { // generate Key Schedule (byte-array Nr+1 x Nb) from Key [§5.2]
1.111 + var Nb = 4; // block size (in words): no of columns in state (fixed at 4 for AES)
1.112 + var Nk = key.length/4 // key length (in words): 4/6/8 for 128/192/256-bit keys
1.113 + var Nr = Nk + 6; // no of rounds: 10/12/14 for 128/192/256-bit keys
1.114 +
1.115 + var w = new Array(Nb*(Nr+1));
1.116 + var temp = new Array(4);
1.117 +
1.118 + /* BEGIN LOOP */
1.119 + for (var i=0; i<Nk; i++) {
1.120 + var r = [key[4*i], key[4*i+1], key[4*i+2], key[4*i+3]];
1.121 + w[i] = r;
1.122 + }
1.123 + /* END LOOP */
1.124 +
1.125 + /* BEGIN LOOP */
1.126 + for (var i=Nk; i<(Nb*(Nr+1)); i++) {
1.127 + w[i] = new Array(4);
1.128 + /* BEGIN LOOP */
1.129 + for (var t=0; t<4; t++) temp[t] = w[i-1][t];
1.130 + /* END LOOP */
1.131 + if (i % Nk == 0) {
1.132 + temp = SubWord(RotWord(temp));
1.133 + /* BEGIN LOOP */
1.134 + for (var t=0; t<4; t++) temp[t] ^= Rcon[i/Nk][t];
1.135 + /* END LOOP */
1.136 + } else if (Nk > 6 && i%Nk == 4) {
1.137 + temp = SubWord(temp);
1.138 + }
1.139 + /* BEGIN LOOP */
1.140 + for (var t=0; t<4; t++) w[i][t] = w[i-Nk][t] ^ temp[t];
1.141 + /* END LOOP */
1.142 + }
1.143 + /* END LOOP */
1.144 +
1.145 + return w;
1.146 +}
1.147 +
1.148 +function SubWord(w) { // apply SBox to 4-byte word w
1.149 + /* BEGIN LOOP */
1.150 + for (var i=0; i<4; i++) w[i] = Sbox[w[i]];
1.151 + /* END LOOP */
1.152 + return w;
1.153 +}
1.154 +
1.155 +function RotWord(w) { // rotate 4-byte word w left by one byte
1.156 + w[4] = w[0];
1.157 + /* BEGIN LOOP */
1.158 + for (var i=0; i<4; i++) w[i] = w[i+1];
1.159 + /* END LOOP */
1.160 + return w;
1.161 +}
1.162 +
1.163 +
1.164 +// Sbox is pre-computed multiplicative inverse in GF(2^8) used in SubBytes and KeyExpansion [§5.1.1]
1.165 +var Sbox = [0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76,
1.166 + 0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0,
1.167 + 0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15,
1.168 + 0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75,
1.169 + 0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84,
1.170 + 0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf,
1.171 + 0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8,
1.172 + 0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2,
1.173 + 0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73,
1.174 + 0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb,
1.175 + 0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79,
1.176 + 0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08,
1.177 + 0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a,
1.178 + 0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e,
1.179 + 0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf,
1.180 + 0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16];
1.181 +
1.182 +// Rcon is Round Constant used for the Key Expansion [1st col is 2^(r-1) in GF(2^8)] [§5.2]
1.183 +var Rcon = [ [0x00, 0x00, 0x00, 0x00],
1.184 + [0x01, 0x00, 0x00, 0x00],
1.185 + [0x02, 0x00, 0x00, 0x00],
1.186 + [0x04, 0x00, 0x00, 0x00],
1.187 + [0x08, 0x00, 0x00, 0x00],
1.188 + [0x10, 0x00, 0x00, 0x00],
1.189 + [0x20, 0x00, 0x00, 0x00],
1.190 + [0x40, 0x00, 0x00, 0x00],
1.191 + [0x80, 0x00, 0x00, 0x00],
1.192 + [0x1b, 0x00, 0x00, 0x00],
1.193 + [0x36, 0x00, 0x00, 0x00] ];
1.194 +
1.195 +
1.196 +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
1.197 +
1.198 +/*
1.199 + * Use AES to encrypt 'plaintext' with 'password' using 'nBits' key, in 'Counter' mode of operation
1.200 + * - see http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
1.201 + * for each block
1.202 + * - outputblock = cipher(counter, key)
1.203 + * - cipherblock = plaintext xor outputblock
1.204 + */
1.205 +function AESEncryptCtr(plaintext, password, nBits) {
1.206 + if (!(nBits==128 || nBits==192 || nBits==256)) return ''; // standard allows 128/192/256 bit keys
1.207 +
1.208 + // for this example script, generate the key by applying Cipher to 1st 16/24/32 chars of password;
1.209 + // for real-world applications, a more secure approach would be to hash the password e.g. with SHA-1
1.210 + var nBytes = nBits/8; // no bytes in key
1.211 + var pwBytes = new Array(nBytes);
1.212 + /* BEGIN LOOP */
1.213 + for (var i=0; i<nBytes; i++) pwBytes[i] = password.charCodeAt(i) & 0xff;
1.214 + /* END LOOP */
1.215 + var key = Cipher(pwBytes, KeyExpansion(pwBytes));
1.216 + key = key.concat(key.slice(0, nBytes-16)); // key is now 16/24/32 bytes long
1.217 +
1.218 + // initialise counter block (NIST SP800-38A §B.2): millisecond time-stamp for nonce in 1st 8 bytes,
1.219 + // block counter in 2nd 8 bytes
1.220 + var blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
1.221 + var counterBlock = new Array(blockSize); // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
1.222 + var nonce = (new Date()).getTime(); // milliseconds since 1-Jan-1970
1.223 +
1.224 + // encode nonce in two stages to cater for JavaScript 32-bit limit on bitwise ops
1.225 + /* BEGIN LOOP */
1.226 + for (var i=0; i<4; i++) counterBlock[i] = (nonce >>> i*8) & 0xff;
1.227 + /* END LOOP */
1.228 + /* BEGIN LOOP */
1.229 + for (var i=0; i<4; i++) counterBlock[i+4] = (nonce/0x100000000 >>> i*8) & 0xff;
1.230 + /* END LOOP */
1.231 +
1.232 + // generate key schedule - an expansion of the key into distinct Key Rounds for each round
1.233 + var keySchedule = KeyExpansion(key);
1.234 +
1.235 + var blockCount = Math.ceil(plaintext.length/blockSize);
1.236 + var ciphertext = new Array(blockCount); // ciphertext as array of strings
1.237 +
1.238 + /* BEGIN LOOP */
1.239 + for (var b=0; b<blockCount; b++) {
1.240 + // set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes)
1.241 + // again done in two stages for 32-bit ops
1.242 + /* BEGIN LOOP */
1.243 + for (var c=0; c<4; c++) counterBlock[15-c] = (b >>> c*8) & 0xff;
1.244 + /* END LOOP */
1.245 + /* BEGIN LOOP */
1.246 + for (var c=0; c<4; c++) counterBlock[15-c-4] = (b/0x100000000 >>> c*8)
1.247 + /* END LOOP */
1.248 +
1.249 + var cipherCntr = Cipher(counterBlock, keySchedule); // -- encrypt counter block --
1.250 +
1.251 + // calculate length of final block:
1.252 + var blockLength = b<blockCount-1 ? blockSize : (plaintext.length-1)%blockSize+1;
1.253 +
1.254 + var ct = '';
1.255 + /* BEGIN LOOP */
1.256 + for (var i=0; i<blockLength; i++) { // -- xor plaintext with ciphered counter byte-by-byte --
1.257 + var plaintextByte = plaintext.charCodeAt(b*blockSize+i);
1.258 + var cipherByte = plaintextByte ^ cipherCntr[i];
1.259 + ct += String.fromCharCode(cipherByte);
1.260 + }
1.261 + /* END LOOP */
1.262 + // ct is now ciphertext for this block
1.263 +
1.264 + ciphertext[b] = escCtrlChars(ct); // escape troublesome characters in ciphertext
1.265 + }
1.266 + /* END LOOP */
1.267 +
1.268 + // convert the nonce to a string to go on the front of the ciphertext
1.269 + var ctrTxt = '';
1.270 + /* BEGIN LOOP */
1.271 + for (var i=0; i<8; i++) ctrTxt += String.fromCharCode(counterBlock[i]);
1.272 + /* END LOOP */
1.273 + ctrTxt = escCtrlChars(ctrTxt);
1.274 +
1.275 + // use '-' to separate blocks, use Array.join to concatenate arrays of strings for efficiency
1.276 + return ctrTxt + '-' + ciphertext.join('-');
1.277 +}
1.278 +
1.279 +
1.280 +/*
1.281 + * Use AES to decrypt 'ciphertext' with 'password' using 'nBits' key, in Counter mode of operation
1.282 + *
1.283 + * for each block
1.284 + * - outputblock = cipher(counter, key)
1.285 + * - cipherblock = plaintext xor outputblock
1.286 + */
1.287 +function AESDecryptCtr(ciphertext, password, nBits) {
1.288 + if (!(nBits==128 || nBits==192 || nBits==256)) return ''; // standard allows 128/192/256 bit keys
1.289 +
1.290 + var nBytes = nBits/8; // no bytes in key
1.291 + var pwBytes = new Array(nBytes);
1.292 + /* BEGIN LOOP */
1.293 + for (var i=0; i<nBytes; i++) pwBytes[i] = password.charCodeAt(i) & 0xff;
1.294 + /* END LOOP */
1.295 + var pwKeySchedule = KeyExpansion(pwBytes);
1.296 + var key = Cipher(pwBytes, pwKeySchedule);
1.297 + key = key.concat(key.slice(0, nBytes-16)); // key is now 16/24/32 bytes long
1.298 +
1.299 + var keySchedule = KeyExpansion(key);
1.300 +
1.301 + ciphertext = ciphertext.split('-'); // split ciphertext into array of block-length strings
1.302 +
1.303 + // recover nonce from 1st element of ciphertext
1.304 + var blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
1.305 + var counterBlock = new Array(blockSize);
1.306 + var ctrTxt = unescCtrlChars(ciphertext[0]);
1.307 + /* BEGIN LOOP */
1.308 + for (var i=0; i<8; i++) counterBlock[i] = ctrTxt.charCodeAt(i);
1.309 + /* END LOOP */
1.310 +
1.311 + var plaintext = new Array(ciphertext.length-1);
1.312 +
1.313 + /* BEGIN LOOP */
1.314 + for (var b=1; b<ciphertext.length; b++) {
1.315 + // set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes)
1.316 + /* BEGIN LOOP */
1.317 + for (var c=0; c<4; c++) counterBlock[15-c] = ((b-1) >>> c*8) & 0xff;
1.318 + /* END LOOP */
1.319 + /* BEGIN LOOP */
1.320 + for (var c=0; c<4; c++) counterBlock[15-c-4] = ((b/0x100000000-1) >>> c*8) & 0xff;
1.321 + /* END LOOP */
1.322 +
1.323 + var cipherCntr = Cipher(counterBlock, keySchedule); // encrypt counter block
1.324 +
1.325 + ciphertext[b] = unescCtrlChars(ciphertext[b]);
1.326 +
1.327 + var pt = '';
1.328 + /* BEGIN LOOP */
1.329 + for (var i=0; i<ciphertext[b].length; i++) {
1.330 + // -- xor plaintext with ciphered counter byte-by-byte --
1.331 + var ciphertextByte = ciphertext[b].charCodeAt(i);
1.332 + var plaintextByte = ciphertextByte ^ cipherCntr[i];
1.333 + pt += String.fromCharCode(plaintextByte);
1.334 + }
1.335 + /* END LOOP */
1.336 + // pt is now plaintext for this block
1.337 +
1.338 + plaintext[b-1] = pt; // b-1 'cos no initial nonce block in plaintext
1.339 + }
1.340 + /* END LOOP */
1.341 +
1.342 + return plaintext.join('');
1.343 +}
1.344 +
1.345 +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
1.346 +
1.347 +function escCtrlChars(str) { // escape control chars which might cause problems handling ciphertext
1.348 + return str.replace(/[\0\t\n\v\f\r\xa0'"!-]/g, function(c) { return '!' + c.charCodeAt(0) + '!'; });
1.349 +} // \xa0 to cater for bug in Firefox; include '-' to leave it free for use as a block marker
1.350 +
1.351 +function unescCtrlChars(str) { // unescape potentially problematic control characters
1.352 + return str.replace(/!\d\d?\d?!/g, function(c) { return String.fromCharCode(c.slice(1,-1)); });
1.353 +}
1.354 +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
1.355 +
1.356 +/*
1.357 + * if escCtrlChars()/unescCtrlChars() still gives problems, use encodeBase64()/decodeBase64() instead
1.358 + */
1.359 +var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
1.360 +
1.361 +function encodeBase64(str) { // http://tools.ietf.org/html/rfc4648
1.362 + var o1, o2, o3, h1, h2, h3, h4, bits, i=0, enc='';
1.363 +
1.364 + str = encodeUTF8(str); // encode multi-byte chars into UTF-8 for byte-array
1.365 +
1.366 + /* BEGIN LOOP */
1.367 + do { // pack three octets into four hexets
1.368 + o1 = str.charCodeAt(i++);
1.369 + o2 = str.charCodeAt(i++);
1.370 + o3 = str.charCodeAt(i++);
1.371 +
1.372 + bits = o1<<16 | o2<<8 | o3;
1.373 +
1.374 + h1 = bits>>18 & 0x3f;
1.375 + h2 = bits>>12 & 0x3f;
1.376 + h3 = bits>>6 & 0x3f;
1.377 + h4 = bits & 0x3f;
1.378 +
1.379 + // end of string? index to '=' in b64
1.380 + if (isNaN(o3)) h4 = 64;
1.381 + if (isNaN(o2)) h3 = 64;
1.382 +
1.383 + // use hexets to index into b64, and append result to encoded string
1.384 + enc += b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
1.385 + } while (i < str.length);
1.386 + /* END LOOP */
1.387 +
1.388 + return enc;
1.389 +}
1.390 +
1.391 +function decodeBase64(str) {
1.392 + var o1, o2, o3, h1, h2, h3, h4, bits, i=0, enc='';
1.393 +
1.394 + /* BEGIN LOOP */
1.395 + do { // unpack four hexets into three octets using index points in b64
1.396 + h1 = b64.indexOf(str.charAt(i++));
1.397 + h2 = b64.indexOf(str.charAt(i++));
1.398 + h3 = b64.indexOf(str.charAt(i++));
1.399 + h4 = b64.indexOf(str.charAt(i++));
1.400 +
1.401 + bits = h1<<18 | h2<<12 | h3<<6 | h4;
1.402 +
1.403 + o1 = bits>>16 & 0xff;
1.404 + o2 = bits>>8 & 0xff;
1.405 + o3 = bits & 0xff;
1.406 +
1.407 + if (h3 == 64) enc += String.fromCharCode(o1);
1.408 + else if (h4 == 64) enc += String.fromCharCode(o1, o2);
1.409 + else enc += String.fromCharCode(o1, o2, o3);
1.410 + } while (i < str.length);
1.411 + /* END LOOP */
1.412 +
1.413 + return decodeUTF8(enc); // decode UTF-8 byte-array back to Unicode
1.414 +}
1.415 +
1.416 +function encodeUTF8(str) { // encode multi-byte string into utf-8 multiple single-byte characters
1.417 + str = str.replace(
1.418 + /[\u0080-\u07ff]/g, // U+0080 - U+07FF = 2-byte chars
1.419 + function(c) {
1.420 + var cc = c.charCodeAt(0);
1.421 + return String.fromCharCode(0xc0 | cc>>6, 0x80 | cc&0x3f); }
1.422 + );
1.423 + str = str.replace(
1.424 + /[\u0800-\uffff]/g, // U+0800 - U+FFFF = 3-byte chars
1.425 + function(c) {
1.426 + var cc = c.charCodeAt(0);
1.427 + return String.fromCharCode(0xe0 | cc>>12, 0x80 | cc>>6&0x3F, 0x80 | cc&0x3f); }
1.428 + );
1.429 + return str;
1.430 +}
1.431 +
1.432 +function decodeUTF8(str) { // decode utf-8 encoded string back into multi-byte characters
1.433 + str = str.replace(
1.434 + /[\u00c0-\u00df][\u0080-\u00bf]/g, // 2-byte chars
1.435 + function(c) {
1.436 + var cc = (c.charCodeAt(0)&0x1f)<<6 | c.charCodeAt(1)&0x3f;
1.437 + return String.fromCharCode(cc); }
1.438 + );
1.439 + str = str.replace(
1.440 + /[\u00e0-\u00ef][\u0080-\u00bf][\u0080-\u00bf]/g, // 3-byte chars
1.441 + function(c) {
1.442 + var cc = (c.charCodeAt(0)&0x0f)<<12 | (c.charCodeAt(1)&0x3f<<6) | c.charCodeAt(2)&0x3f;
1.443 + return String.fromCharCode(cc); }
1.444 + );
1.445 + return str;
1.446 +}
1.447 +
1.448 +
1.449 +function byteArrayToHexStr(b) { // convert byte array to hex string for displaying test vectors
1.450 + var s = '';
1.451 + /* BEGIN LOOP */
1.452 + for (var i=0; i<b.length; i++) s += b[i].toString(16) + ' ';
1.453 + /* END LOOP */
1.454 + return s;
1.455 +}
1.456 +
1.457 +/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
1.458 +
1.459 +
1.460 +var plainText = "ROMEO: But, soft! what light through yonder window breaks?\n\
1.461 +It is the east, and Juliet is the sun.\n\
1.462 +Arise, fair sun, and kill the envious moon,\n\
1.463 +Who is already sick and pale with grief,\n\
1.464 +That thou her maid art far more fair than she:\n\
1.465 +Be not her maid, since she is envious;\n\
1.466 +Her vestal livery is but sick and green\n\
1.467 +And none but fools do wear it; cast it off.\n\
1.468 +It is my lady, O, it is my love!\n\
1.469 +O, that she knew she were!\n\
1.470 +She speaks yet she says nothing: what of that?\n\
1.471 +Her eye discourses; I will answer it.\n\
1.472 +I am too bold, 'tis not to me she speaks:\n\
1.473 +Two of the fairest stars in all the heaven,\n\
1.474 +Having some business, do entreat her eyes\n\
1.475 +To twinkle in their spheres till they return.\n\
1.476 +What if her eyes were there, they in her head?\n\
1.477 +The brightness of her cheek would shame those stars,\n\
1.478 +As daylight doth a lamp; her eyes in heaven\n\
1.479 +Would through the airy region stream so bright\n\
1.480 +That birds would sing and think it were not night.\n\
1.481 +See, how she leans her cheek upon her hand!\n\
1.482 +O, that I were a glove upon that hand,\n\
1.483 +That I might touch that cheek!\n\
1.484 +JULIET: Ay me!\n\
1.485 +ROMEO: She speaks:\n\
1.486 +O, speak again, bright angel! for thou art\n\
1.487 +As glorious to this night, being o'er my head\n\
1.488 +As is a winged messenger of heaven\n\
1.489 +Unto the white-upturned wondering eyes\n\
1.490 +Of mortals that fall back to gaze on him\n\
1.491 +When he bestrides the lazy-pacing clouds\n\
1.492 +And sails upon the bosom of the air.";
1.493 +
1.494 +var password = "O Romeo, Romeo! wherefore art thou Romeo?";
1.495 +
1.496 +var cipherText = AESEncryptCtr(plainText, password, 256);
1.497 +var decryptedText = AESDecryptCtr(cipherText, password, 256);
