Added an AES test from SunSpider.

tests/MANIFEST.json

@@ -175,6 +175,14 @@
 	category: "SunSpider JavaScript Tests",
 	tags: ["functions"]
 },
+"sunspider-crypto-aes": {
+	file: "sunspider-crypto-aes.js",
+	name: "AES Encryption/Decryption",
+	origin: ["SunSpider", "http://www2.webkit.org/perf/sunspider-0.9/sunspider.html"],
+	desc: "Encrypt a string and then decrypt it again using AES.",
+	category: "SunSpider JavaScript Tests",
+	tags: ["looping","string","bitops"]
+},
 "sunspider-math-partial-sums": {
 	file: "sunspider-math-partial-sums.js",
 	name: "Partial Sum Calculation",

tests/sunspider-crypto-aes.js

@@ -0,0 +1,439 @@
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */
+
+/*
+ * AES Cipher function: encrypt 'input' with Rijndael algorithm
+ *
+ *   takes   byte-array 'input' (16 bytes)
+ *           2D byte-array key schedule 'w' (Nr+1 x Nb bytes)
+ *
+ *   applies Nr rounds (10/12/14) using key schedule w for 'add round key' stage
+ *
+ *   returns byte-array encrypted value (16 bytes)
+ */
+function Cipher(input, w) {    // main Cipher function [§5.1]
+  var Nb = 4;               // block size (in words): no of columns in state (fixed at 4 for AES)
+  var Nr = w.length/Nb - 1; // no of rounds: 10/12/14 for 128/192/256-bit keys
+
+  var state = [[],[],[],[]];  // initialise 4xNb byte-array 'state' with input [§3.4]
+  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);  // convert state to 1-d array before returning [§3.4]
+  for (var i=0; i<4*Nb; i++) output[i] = state[i%4][Math.floor(i/4)];
+  return output;
+}
+
+
+function SubBytes(s, Nb) {    // apply SBox to state S [§5.1.1]
+  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) {    // shift row r of state S left by r bytes [§5.1.2]
+  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];  // shift into temp copy
+    for (var c=0; c<4; c++) s[r][c] = t[c];         // and copy back
+  }          // note that this will work for Nb=4,5,6, but not 7,8 (always 4 for AES):
+  return s;  // see fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.311.pdf 
+}
+
+
+function MixColumns(s, Nb) {   // combine bytes of each col of state S [§5.1.3]
+  for (var c=0; c<4; c++) {
+    var a = new Array(4);  // 'a' is a copy of the current column from 's'
+    var b = new Array(4);  // 'b' is a•{02} in GF(2^8)
+    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;
+    }
+    // a[n] ^ b[n] is a•{03} in GF(2^8)
+    s[0][c] = b[0] ^ a[1] ^ b[1] ^ a[2] ^ a[3]; // 2*a0 + 3*a1 + a2 + a3
+    s[1][c] = a[0] ^ b[1] ^ a[2] ^ b[2] ^ a[3]; // a0 * 2*a1 + 3*a2 + a3
+    s[2][c] = a[0] ^ a[1] ^ b[2] ^ a[3] ^ b[3]; // a0 + a1 + 2*a2 + 3*a3
+    s[3][c] = a[0] ^ b[0] ^ a[1] ^ a[2] ^ b[3]; // 3*a0 + a1 + a2 + 2*a3
+  }
+  return s;
+}
+
+
+function AddRoundKey(state, w, rnd, Nb) {  // xor Round Key into state S [§5.1.4]
+  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) {  // generate Key Schedule (byte-array Nr+1 x Nb) from Key [§5.2]
+  var Nb = 4;            // block size (in words): no of columns in state (fixed at 4 for AES)
+  var Nk = key.length/4  // key length (in words): 4/6/8 for 128/192/256-bit keys
+  var Nr = Nk + 6;       // no of rounds: 10/12/14 for 128/192/256-bit keys
+
+  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) {    // apply SBox to 4-byte word w
+  for (var i=0; i<4; i++) w[i] = Sbox[w[i]];
+  return w;
+}
+
+function RotWord(w) {    // rotate 4-byte word w left by one byte
+  w[4] = w[0];
+  for (var i=0; i<4; i++) w[i] = w[i+1];
+  return w;
+}
+
+
+// Sbox is pre-computed multiplicative inverse in GF(2^8) used in SubBytes and KeyExpansion [§5.1.1]
+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];
+
+// Rcon is Round Constant used for the Key Expansion [1st col is 2^(r-1) in GF(2^8)] [§5.2]
+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] ]; 
+
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */
+
+/* 
+ * Use AES to encrypt 'plaintext' with 'password' using 'nBits' key, in 'Counter' mode of operation
+ *                           - see http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
+ *   for each block
+ *   - outputblock = cipher(counter, key)
+ *   - cipherblock = plaintext xor outputblock
+ */
+function AESEncryptCtr(plaintext, password, nBits) {
+  if (!(nBits==128 || nBits==192 || nBits==256)) return '';  // standard allows 128/192/256 bit keys
+
+  // for this example script, generate the key by applying Cipher to 1st 16/24/32 chars of password; 
+  // for real-world applications, a more secure approach would be to hash the password e.g. with SHA-1
+  var nBytes = nBits/8;  // no bytes in key
+  var pwBytes = new Array(nBytes);
+  for (var i=0; i<nBytes; i++) pwBytes[i] = password.charCodeAt(i) & 0xff;
+  var key = Cipher(pwBytes, KeyExpansion(pwBytes));
+  key = key.concat(key.slice(0, nBytes-16));  // key is now 16/24/32 bytes long
+
+  // initialise counter block (NIST SP800-38A §B.2): millisecond time-stamp for nonce in 1st 8 bytes,
+  // block counter in 2nd 8 bytes
+  var blockSize = 16;  // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
+  var counterBlock = new Array(blockSize);  // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
+  var nonce = (new Date()).getTime();  // milliseconds since 1-Jan-1970
+
+  // encode nonce in two stages to cater for JavaScript 32-bit limit on bitwise ops
+  for (var i=0; i<4; i++) counterBlock[i] = (nonce >>> i*8) & 0xff;
+  for (var i=0; i<4; i++) counterBlock[i+4] = (nonce/0x100000000 >>> i*8) & 0xff; 
+
+  // generate key schedule - an expansion of the key into distinct Key Rounds for each round
+  var keySchedule = KeyExpansion(key);
+
+  var blockCount = Math.ceil(plaintext.length/blockSize);
+  var ciphertext = new Array(blockCount);  // ciphertext as array of strings
+  
+  for (var b=0; b<blockCount; b++) {
+    // set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes)
+    // again done in two stages for 32-bit ops
+    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);  // -- encrypt counter block --
+    
+    // calculate length of final block:
+    var blockLength = b<blockCount-1 ? blockSize : (plaintext.length-1)%blockSize+1;
+
+    var ct = '';
+    for (var i=0; i<blockLength; i++) {  // -- xor plaintext with ciphered counter byte-by-byte --
+      var plaintextByte = plaintext.charCodeAt(b*blockSize+i);
+      var cipherByte = plaintextByte ^ cipherCntr[i];
+      ct += String.fromCharCode(cipherByte);
+    }
+    // ct is now ciphertext for this block
+
+    ciphertext[b] = escCtrlChars(ct);  // escape troublesome characters in ciphertext
+  }
+
+  // convert the nonce to a string to go on the front of the ciphertext
+  var ctrTxt = '';
+  for (var i=0; i<8; i++) ctrTxt += String.fromCharCode(counterBlock[i]);
+  ctrTxt = escCtrlChars(ctrTxt);
+
+  // use '-' to separate blocks, use Array.join to concatenate arrays of strings for efficiency
+  return ctrTxt + '-' + ciphertext.join('-');
+}
+
+
+/* 
+ * Use AES to decrypt 'ciphertext' with 'password' using 'nBits' key, in Counter mode of operation
+ *
+ *   for each block
+ *   - outputblock = cipher(counter, key)
+ *   - cipherblock = plaintext xor outputblock
+ */
+function AESDecryptCtr(ciphertext, password, nBits) {
+  if (!(nBits==128 || nBits==192 || nBits==256)) return '';  // standard allows 128/192/256 bit keys
+
+  var nBytes = nBits/8;  // no bytes in key
+  var pwBytes = new Array(nBytes);
+  for (var i=0; i<nBytes; i++) pwBytes[i] = password.charCodeAt(i) & 0xff;
+  var pwKeySchedule = KeyExpansion(pwBytes);
+  var key = Cipher(pwBytes, pwKeySchedule);
+  key = key.concat(key.slice(0, nBytes-16));  // key is now 16/24/32 bytes long
+
+  var keySchedule = KeyExpansion(key);
+
+  ciphertext = ciphertext.split('-');  // split ciphertext into array of block-length strings 
+
+  // recover nonce from 1st element of ciphertext
+  var blockSize = 16;  // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
+  var counterBlock = new Array(blockSize);
+  var ctrTxt = unescCtrlChars(ciphertext[0]);
+  for (var i=0; i<8; i++) counterBlock[i] = ctrTxt.charCodeAt(i);
+
+  var plaintext = new Array(ciphertext.length-1);
+
+  for (var b=1; b<ciphertext.length; b++) {
+    // set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes)
+    for (var c=0; c<4; c++) counterBlock[15-c] = ((b-1) >>> c*8) & 0xff;
+    for (var c=0; c<4; c++) counterBlock[15-c-4] = ((b/0x100000000-1) >>> c*8) & 0xff;
+
+    var cipherCntr = Cipher(counterBlock, keySchedule);  // encrypt counter block
+
+    ciphertext[b] = unescCtrlChars(ciphertext[b]);
+
+    var pt = '';
+    for (var i=0; i<ciphertext[b].length; i++) {
+      // -- xor plaintext with ciphered counter byte-by-byte --
+      var ciphertextByte = ciphertext[b].charCodeAt(i);
+      var plaintextByte = ciphertextByte ^ cipherCntr[i];
+      pt += String.fromCharCode(plaintextByte);
+    }
+    // pt is now plaintext for this block
+
+    plaintext[b-1] = pt;  // b-1 'cos no initial nonce block in plaintext
+  }
+
+  return plaintext.join('');
+}
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */
+
+function escCtrlChars(str) {  // escape control chars which might cause problems handling ciphertext
+  return str.replace(/[\0\t\n\v\f\r\xa0'"!-]/g, function(c) { return '!' + c.charCodeAt(0) + '!'; });
+}  // \xa0 to cater for bug in Firefox; include '-' to leave it free for use as a block marker
+
+function unescCtrlChars(str) {  // unescape potentially problematic control characters
+  return str.replace(/!\d\d?\d?!/g, function(c) { return String.fromCharCode(c.slice(1,-1)); });
+}
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */
+
+/*
+ * if escCtrlChars()/unescCtrlChars() still gives problems, use encodeBase64()/decodeBase64() instead
+ */
+var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+
+function encodeBase64(str) {  // http://tools.ietf.org/html/rfc4648
+   var o1, o2, o3, h1, h2, h3, h4, bits, i=0, enc='';
+   
+   str = encodeUTF8(str);  // encode multi-byte chars into UTF-8 for byte-array
+
+   do {  // pack three octets into four hexets
+      o1 = str.charCodeAt(i++);
+      o2 = str.charCodeAt(i++);
+      o3 = str.charCodeAt(i++);
+      
+      bits = o1<<16 | o2<<8 | o3;
+      
+      h1 = bits>>18 & 0x3f;
+      h2 = bits>>12 & 0x3f;
+      h3 = bits>>6 & 0x3f;
+      h4 = bits & 0x3f;
+      
+      // end of string? index to '=' in b64
+      if (isNaN(o3)) h4 = 64;
+      if (isNaN(o2)) h3 = 64;
+      
+      // use hexets to index into b64, and append result to encoded string
+      enc += b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
+   } while (i < str.length);
+   
+   return enc;
+}
+
+function decodeBase64(str) {
+   var o1, o2, o3, h1, h2, h3, h4, bits, i=0, enc='';
+
+   do {  // unpack four hexets into three octets using index points in b64
+      h1 = b64.indexOf(str.charAt(i++));
+      h2 = b64.indexOf(str.charAt(i++));
+      h3 = b64.indexOf(str.charAt(i++));
+      h4 = b64.indexOf(str.charAt(i++));
+      
+      bits = h1<<18 | h2<<12 | h3<<6 | h4;
+      
+      o1 = bits>>16 & 0xff;
+      o2 = bits>>8 & 0xff;
+      o3 = bits & 0xff;
+      
+      if (h3 == 64)      enc += String.fromCharCode(o1);
+      else if (h4 == 64) enc += String.fromCharCode(o1, o2);
+      else               enc += String.fromCharCode(o1, o2, o3);
+   } while (i < str.length);
+
+   return decodeUTF8(enc);  // decode UTF-8 byte-array back to Unicode
+}
+
+function encodeUTF8(str) {  // encode multi-byte string into utf-8 multiple single-byte characters 
+  str = str.replace(
+      /[\u0080-\u07ff]/g,  // U+0080 - U+07FF = 2-byte chars
+      function(c) { 
+        var cc = c.charCodeAt(0);
+        return String.fromCharCode(0xc0 | cc>>6, 0x80 | cc&0x3f); }
+    );
+  str = str.replace(
+      /[\u0800-\uffff]/g,  // U+0800 - U+FFFF = 3-byte chars
+      function(c) { 
+        var cc = c.charCodeAt(0); 
+        return String.fromCharCode(0xe0 | cc>>12, 0x80 | cc>>6&0x3F, 0x80 | cc&0x3f); }
+    );
+  return str;
+}
+
+function decodeUTF8(str) {  // decode utf-8 encoded string back into multi-byte characters
+  str = str.replace(
+      /[\u00c0-\u00df][\u0080-\u00bf]/g,                 // 2-byte chars
+      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,  // 3-byte chars
+      function(c) { 
+        var cc = (c.charCodeAt(0)&0x0f)<<12 | (c.charCodeAt(1)&0x3f<<6) | c.charCodeAt(2)&0x3f; 
+        return String.fromCharCode(cc); }
+    );
+  return str;
+}
+
+
+function byteArrayToHexStr(b) {  // convert byte array to hex string for displaying test vectors
+  var s = '';
+  for (var i=0; i<b.length; i++) s += b[i].toString(16) + ' ';
+  return s;
+}
+
+/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */
+
+
+var plainText = "ROMEO: But, soft! what light through yonder window breaks?\n\
+It is the east, and Juliet is the sun.\n\
+Arise, fair sun, and kill the envious moon,\n\
+Who is already sick and pale with grief,\n\
+That thou her maid art far more fair than she:\n\
+Be not her maid, since she is envious;\n\
+Her vestal livery is but sick and green\n\
+And none but fools do wear it; cast it off.\n\
+It is my lady, O, it is my love!\n\
+O, that she knew she were!\n\
+She speaks yet she says nothing: what of that?\n\
+Her eye discourses; I will answer it.\n\
+I am too bold, 'tis not to me she speaks:\n\
+Two of the fairest stars in all the heaven,\n\
+Having some business, do entreat her eyes\n\
+To twinkle in their spheres till they return.\n\
+What if her eyes were there, they in her head?\n\
+The brightness of her cheek would shame those stars,\n\
+As daylight doth a lamp; her eyes in heaven\n\
+Would through the airy region stream so bright\n\
+That birds would sing and think it were not night.\n\
+See, how she leans her cheek upon her hand!\n\
+O, that I were a glove upon that hand,\n\
+That I might touch that cheek!\n\
+JULIET: Ay me!\n\
+ROMEO: She speaks:\n\
+O, speak again, bright angel! for thou art\n\
+As glorious to this night, being o'er my head\n\
+As is a winged messenger of heaven\n\
+Unto the white-upturned wondering eyes\n\
+Of mortals that fall back to gaze on him\n\
+When he bestrides the lazy-pacing clouds\n\
+And sails upon the bosom of the air.";
+
+var password = "O Romeo, Romeo! wherefore art thou Romeo?";
+var cipherText, decryptedText;
+
+startTest("sunspider-crypto-aes");
+
+for ( var i = 0; i < 4; i++ ) {
+
+test("AES Encrypt", i, function(){
+	cipherText = AESEncryptCtr(plainText, password, 256);
+});
+
+test("AES Decrypt", i, function(){
+	decryptedText = AESDecryptCtr(cipherText, password, 256);
+
+	if ( decryptedText !== plainText )
+		throw "Decryption failed.";
+});
+
+}
+
+endTest();