📄 offline.js.uncompressed.js
字号:
* * 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; } /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ /* * 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)); }); } /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ function encrypt(plaintext, password){ return AESEncryptCtr(plaintext, password, 256); } function decrypt(ciphertext, password){ return AESDecryptCtr(ciphertext, password, 256); } /* End AES Implementation */ var cmd = msg.substr(0,4); var arg = msg.substr(5); if(cmd == "encr"){ arg = eval("(" + arg + ")"); var plaintext = arg.plaintext; var password = arg.password; var results = encrypt(plaintext, password); gearsWorkerPool.sendMessage(String(results), sender); }else if(cmd == "decr"){ arg = eval("(" + arg + ")"); var ciphertext = arg.ciphertext; var password = arg.password; var results = decrypt(ciphertext, password); gearsWorkerPool.sendMessage(String(results), sender); } }});}if(!dojo._hasResource["dojox._sql.common"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.dojo._hasResource["dojox._sql.common"] = true;dojo.provide("dojox._sql.common");// summary:// Executes a SQL expression.// description:// There are four ways to call this:// 1) Straight SQL: dojox.sql("SELECT * FROM FOOBAR");// 2) SQL with parameters: dojox.sql("INSERT INTO FOOBAR VALUES (?)", someParam)// 3) Encrypting particular values: // dojox.sql("INSERT INTO FOOBAR VALUES (ENCRYPT(?))", someParam, "somePassword", callback)// 4) Decrypting particular values:// dojox.sql("SELECT DECRYPT(SOMECOL1), DECRYPT(SOMECOL2) FROM// FOOBAR WHERE SOMECOL3 = ?", someParam,// "somePassword", callback)//// For encryption and decryption the last two values should be the the password for// encryption/decryption, and the callback function that gets the result set.//// Note: We only support ENCRYPT(?) statements, and// and DECRYPT(*) statements for now -- you can not have a literal string// inside of these, such as ENCRYPT('foobar')//// Note: If you have multiple columns to encrypt and decrypt, you can use the following// convenience form to not have to type ENCRYPT(?)/DECRYPT(*) many times://// dojox.sql("INSERT INTO FOOBAR VALUES (ENCRYPT(?, ?, ?))", // someParam1, someParam2, someParam3, // "somePassword", callback)//// dojox.sql("SELECT DECRYPT(SOMECOL1, SOMECOL2) FROM// FOOBAR WHERE SOMECOL3 = ?", someParam,// "somePassword", callback)dojox.sql = new Function("return dojox.sql._exec(arguments);");dojo.mixin(dojox.sql, { dbName: null, // summary: // If true, then we print out any SQL that is executed // to the debug window debug: (dojo.exists("dojox.sql.debug")?dojox.sql.debug:false), open: function(dbName){ if(this._dbOpen && (!dbName || dbName == this.dbName)){ return; } if(!this.dbName){ this.dbName = "dot_store_" + window.location.href.replace(/[^0-9A-Za-z_]/g, "_"); // database names in Gears are limited to 64 characters long if(this.dbName.length > 63){ this.dbName = this.dbName.substring(0, 63); } } if(!dbName){ dbName = this.dbName; } try{ this._initDb(); this.db.open(dbName); this._dbOpen = true; }catch(exp){ throw exp.message||exp; } }, close: function(dbName){ // on Internet Explorer, Google Gears throws an exception // "Object not a collection", when we try to close the // database -- just don't close it on this platform // since we are running into a Gears bug; the Gears team // said it's ok to not close a database connection if(dojo.isIE){ return; } if(!this._dbOpen && (!dbName || dbName == this.dbName)){ return; } if(!dbName){ dbName = this.dbName; } try{ this.db.close(dbName); this._dbOpen = false; }catch(exp){ throw exp.message||exp; } }, _exec: function(params){ try{ // get the Gears Database object this._initDb(); // see if we need to open the db; if programmer // manually called dojox.sql.open() let them handle // it; otherwise we open and close automatically on // each SQL execution if(!this._dbOpen){ this.open(); this._autoClose = true; }
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -