function Cipher(input, w) { var Nb = 4; var Nr = w.length / Nb - 1; var state = [[], [], [], []]; for (var i = 0; i < 4 * Nb; i++) state[i % 4][Math.floor(i / 4)] = input[i]; state = AddRoundKey(state, w, 0, Nb); for (var round = 1; round < Nr; round++) { state = SubBytes(state, Nb); state = ShiftRows(state, Nb); state = MixColumns(state, Nb); state = AddRoundKey(state, w, round, Nb); } state = SubBytes(state, Nb); state = ShiftRows(state, Nb); state = AddRoundKey(state, w, Nr, Nb); var output = new Array(4 * Nb); for (var i = 0; i < 4 * Nb; i++) output[i] = state[i % 4][Math.floor(i / 4)]; return output; } function SubBytes(s, Nb) { for (var r = 0; r < 4; r++) { for (var c = 0; c < Nb; c++) s[r][c] = Sbox[s[r][c]]; } return s; } function ShiftRows(s, Nb) { var t = new Array(4); for (var r = 1; r < 4; r++) { for (var c = 0; c < 4; c++) t[c] = s[r][(c + r) % Nb]; for (var c = 0; c < 4; c++) s[r][c] = t[c]; } return s; } function MixColumns(s, Nb) { for (var c = 0; c < 4; c++) { var a = new Array(4); var b = new Array(4); for (var i = 0; i < 4; i++) { a[i] = s[i][c]; b[i] = s[i][c] & 0x80 ? s[i][c] << 1 ^ 0x011b : s[i][c] << 1; } s[0][c] = b[0] ^ a[1] ^ b[1] ^ a[2] ^ a[3]; s[1][c] = a[0] ^ b[1] ^ a[2] ^ b[2] ^ a[3]; s[2][c] = a[0] ^ a[1] ^ b[2] ^ a[3] ^ b[3]; s[3][c] = a[0] ^ b[0] ^ a[1] ^ a[2] ^ b[3]; } return s; } function AddRoundKey(state, w, rnd, Nb) { for (var r = 0; r < 4; r++) { for (var c = 0; c < Nb; c++) state[r][c] ^= w[rnd * 4 + c][r]; } return state; } function KeyExpansion(key) { var Nb = 4; var Nk = key.length / 4; var Nr = Nk + 6; var w = new Array(Nb * (Nr + 1)); var temp = new Array(4); for (var i = 0; i < Nk; i++) { var r = [key[4 * i], key[4 * i + 1], key[4 * i + 2], key[4 * i + 3]]; w[i] = r; } for (var i = Nk; i < (Nb * (Nr + 1)); i++) { w[i] = new Array(4); for (var t = 0; t < 4; t++) temp[t] = w[i - 1][t]; if (i % Nk == 0) { temp = SubWord(RotWord(temp)); for (var t = 0; t < 4; t++) temp[t] ^= Rcon[i / Nk][t]; } else if (Nk > 6 && i % Nk == 4) { temp = SubWord(temp); } for (var t = 0; t < 4; t++) w[i][t] = w[i - Nk][t] ^ temp[t]; } return w; } function SubWord(w) { for (var i = 0; i < 4; i++) w[i] = Sbox[w[i]]; return w; } function RotWord(w) { var tmp = w[0]; for (var i = 0; i < 3; i++) w[i] = w[i + 1]; w[3] = tmp; return w; } var Sbox = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16]; var Rcon = [[0x00, 0x00, 0x00, 0x00], [0x01, 0x00, 0x00, 0x00], [0x02, 0x00, 0x00, 0x00], [0x04, 0x00, 0x00, 0x00], [0x08, 0x00, 0x00, 0x00], [0x10, 0x00, 0x00, 0x00], [0x20, 0x00, 0x00, 0x00], [0x40, 0x00, 0x00, 0x00], [0x80, 0x00, 0x00, 0x00], [0x1b, 0x00, 0x00, 0x00], [0x36, 0x00, 0x00, 0x00]]; function AESEncryptCtr(plaintext, password, nBits) { var blockSize = 16; if (!(nBits == 128 || nBits == 192 || nBits == 256)) return ''; plaintext = plaintext.encodeUTF8(); password = password.encodeUTF8(); var nBytes = nBits / 8; var pwBytes = new Array(nBytes); for (var i = 0; i < nBytes; i++) pwBytes[i] = password.charCodeAt(i); var key = Cipher(pwBytes, KeyExpansion(pwBytes)); key = key.concat(key.slice(0, nBytes - 16)); var counterBlock = new Array(blockSize); var nonce = (new Date()).getTime(); var nonceSec = Math.floor(nonce / 1000); var nonceMs = nonce % 1000; for (var i = 0; i < 4; i++) counterBlock[i] = (nonceSec >>> i * 8) & 0xff; for (var i = 0; i < 4; i++) counterBlock[i + 4] = nonceMs & 0xff; var ctrTxt = ''; for (var i = 0; i < 8; i++) ctrTxt += String.fromCharCode(counterBlock[i]); var keySchedule = KeyExpansion(key); var blockCount = Math.ceil(plaintext.length / blockSize); var ciphertxt = new Array(blockCount); for (var b = 0; b < blockCount; b++) { for (var c = 0; c < 4; c++) counterBlock[15 - c] = (b >>> c * 8) & 0xff; for (var c = 0; c < 4; c++) counterBlock[15 - c - 4] = (b / 0x100000000 >>> c * 8); var cipherCntr = Cipher(counterBlock, keySchedule); var blockLength = b < blockCount - 1 ? blockSize : (plaintext.length - 1) % blockSize + 1; var cipherChar = new Array(blockLength); for (var i = 0; i < blockLength; i++) { cipherChar[i] = cipherCntr[i] ^ plaintext.charCodeAt(b * blockSize + i); cipherChar[i] = String.fromCharCode(cipherChar[i]); } ciphertxt[b] = cipherChar.join(''); } var ciphertext = ctrTxt + ciphertxt.join(''); ciphertext = ciphertext.encodeBase64(); return ciphertext; } function AESDecryptCtr(ciphertext, password, nBits) { var blockSize = 16; if (!(nBits == 128 || nBits == 192 || nBits == 256)) return ''; ciphertext = ciphertext.decodeBase64(); password = password.encodeUTF8(); var nBytes = nBits / 8; var pwBytes = new Array(nBytes); for (var i = 0; i < nBytes; i++) pwBytes[i] = password.charCodeAt(i); var key = Cipher(pwBytes, KeyExpansion(pwBytes)); key = key.concat(key.slice(0, nBytes - 16)); var counterBlock = new Array(8); ctrTxt = ciphertext.slice(0, 8); for (var i = 0; i < 8; i++) counterBlock[i] = ctrTxt.charCodeAt(i); var keySchedule = KeyExpansion(key); var nBlocks = Math.ceil((ciphertext.length - 8) / blockSize); var ct = new Array(nBlocks); for (var b = 0; b < nBlocks; b++) ct[b] = ciphertext.slice(8 + b * blockSize, 8 + b * blockSize + blockSize); ciphertext = ct; var plaintxt = new Array(ciphertext.length); for (var b = 0; b < nBlocks; b++) { for (var c = 0; c < 4; c++) counterBlock[15 - c] = ((b) >>> c * 8) & 0xff; for (var c = 0; c < 4; c++) counterBlock[15 - c - 4] = (((b + 1) / 0x100000000 - 1) >>> c * 8) & 0xff; var cipherCntr = Cipher(counterBlock, keySchedule); var plaintxtByte = new Array(ciphertext[b].length); for (var i = 0; i < ciphertext[b].length; i++) { plaintxtByte[i] = cipherCntr[i] ^ ciphertext[b].charCodeAt(i); plaintxtByte[i] = String.fromCharCode(plaintxtByte[i]); } plaintxt[b] = plaintxtByte.join(''); } var plaintext = plaintxt.join(''); plaintext = plaintext.decodeUTF8(); return plaintext; } var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; String.prototype.encodeBase64 = function(utf8encode) { utf8encode = (typeof utf8encode == 'undefined') ? false : utf8encode; var o1, o2, o3, bits, h1, h2, h3, h4, e = [], pad = '', c, plain, coded; plain = utf8encode ? this.encodeUTF8() : this; c = plain.length % 3; if (c > 0) { while (c++ < 3) { pad += '='; plain += '\0'; } } for (c = 0; c < plain.length; c += 3) { o1 = plain.charCodeAt(c); o2 = plain.charCodeAt(c + 1); o3 = plain.charCodeAt(c + 2); bits = o1 << 16 | o2 << 8 | o3; h1 = bits >> 18 & 0x3f; h2 = bits >> 12 & 0x3f; h3 = bits >> 6 & 0x3f; h4 = bits & 0x3f; e[c / 3] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4); } coded = e.join(''); coded = coded.slice(0, coded.length - pad.length) + pad; return coded; }; String.prototype.decodeBase64 = function(utf8decode) { utf8decode = (typeof utf8decode == 'undefined') ? false : utf8decode; var o1, o2, o3, h1, h2, h3, h4, bits, d = [], plain, coded; coded = utf8decode ? this.decodeUTF8() : this; for (var c = 0; c < coded.length; c += 4) { h1 = b64.indexOf(coded.charAt(c)); h2 = b64.indexOf(coded.charAt(c + 1)); h3 = b64.indexOf(coded.charAt(c + 2)); h4 = b64.indexOf(coded.charAt(c + 3)); bits = h1 << 18 | h2 << 12 | h3 << 6 | h4; o1 = bits >>> 16 & 0xff; o2 = bits >>> 8 & 0xff; o3 = bits & 0xff; d[c / 4] = String.fromCharCode(o1, o2, o3); if (h4 == 0x40) d[c / 4] = String.fromCharCode(o1, o2); if (h3 == 0x40) d[c / 4] = String.fromCharCode(o1); } plain = d.join(''); return utf8decode ? plain.decodeUTF8() : plain; }; String.prototype.encodeUTF8 = function() { var str = this.replace(/[\u0080-\u07ff]/g, function(c) { var cc = c.charCodeAt(0); return String.fromCharCode(0xc0 | cc >> 6, 0x80 | cc & 0x3f); }); str = str.replace(/[\u0800-\uffff]/g, function(c) { var cc = c.charCodeAt(0); return String.fromCharCode(0xe0 | cc >> 12, 0x80 | cc >> 6 & 0x3F, 0x80 | cc & 0x3f); }); return str; }; String.prototype.decodeUTF8 = function() { var str = this.replace(/[\u00c0-\u00df][\u0080-\u00bf]/g, function(c) { var cc = (c.charCodeAt(0) & 0x1f) << 6 | c.charCodeAt(1) & 0x3f; return String.fromCharCode(cc); }); str = str.replace(/[\u00e0-\u00ef][\u0080-\u00bf][\u0080-\u00bf]/g, function(c) { var cc = ((c.charCodeAt(0) & 0x0f) << 12) | ((c.charCodeAt(1) & 0x3f) << 6) | (c.charCodeAt(2) & 0x3f); return String.fromCharCode(cc); }); return str; };