[JS]js版encrypt.js源代码
[JS]js版encrypt.js源代码
[JS]js版encrypt.js源代码
- /*
- * jCryption JavaScript data encryption v1.1
- * http://www.jcryption.org/
- *
- * Copyright (c) 2010 Daniel Griesser
- * Dual licensed under the MIT and GPL licenses.
- * http://www.opensource.org/licenses/mit-license.php
- * http://www.opensource.org/licenses/gpl-2.0.php
- *
- * If you need any further information about this plugin please
- * visit my homepage or contact me under daniel.griesser@jcryption.org
- */
- (function($) {
- $.jCryption = function(el, options) {
- var base = this;
- base.$el = $(el);
- base.el = el;
- base.$el.data("jCryption", base);
- base.init = function() {
- base.options = $.extend({},$.jCryption.defaultOptions, options);
- $encryptedElement = $("<input />",{
- type:'hidden',
- name:base.options.postVariable
- });
- if (base.options.submitElement !== false) {
- var $submitElement = base.options.submitElement;
- } else {
- var $submitElement = base.$el.find(":input:submit");
- }
- $submitElement.bind(base.options.submitEvent,function() {
- $(this).attr("disabled",true);
- if(base.options.beforeEncryption()) {
- $.jCryption.getKeys(base.options.getKeysURL,function(keys) {
- $.jCryption.encrypt(base.$el.serialize(),keys,function(encrypted) {
- $encryptedElement.val(encrypted);
- $(base.$el).find(":input").attr("disabled",true).end().append($encryptedElement).submit();
- });
- });
- }
- return false;
- });
- };
- base.init();
- };
- $.jCryption.getKeys = function(url,callback) {
- var base = this;
- base.getKeys = function() {
- //$.getJSON(url,function(data){
- data = url;
- keys = new base.jCryptionKeyPair(data.e,data.n,data.maxdigits);
- if($.isFunction(callback)) {
- callback.call(this, keys);
- }
- //});
- };
- base.jCryptionKeyPair = function(encryptionExponent, modulus, maxdigits) {
- setMaxDigits(parseInt(maxdigits,10));
- this.e = biFromHex(encryptionExponent);
- this.m = biFromHex(modulus);
- this.chunkSize = 2 * biHighIndex(this.m);
- this.radix = 16;
- this.barrett = new BarrettMu(this.m);
- };
- base.getKeys();
- };
- $.jCryption.encrypt = function(string,keyPair,callback) {
- var charSum = 0;
- for(var i = 0; i < string.length; i++){
- charSum += string.charCodeAt(i);
- }
- var tag = '0123456789abcdef';
- var hex = '';
- hex += tag.charAt((charSum & 0xF0) >> 4) + tag.charAt(charSum & 0x0F);
- var taggedString = hex + string;
- var encrypt = [];
- var j = 0;
- while (j < taggedString.length) {
- encrypt[j] = taggedString.charCodeAt(j);
- j++;
- }
- while (encrypt.length % keyPair.chunkSize !== 0) {
- encrypt[j++] = 0;
- }
- function encryption(encryptObject) {
- var charCounter = 0;
- var j, block;
- var encrypted = "";
- function encryptChar() {
- block = new BigInt();
- j = 0;
- for (var k = charCounter; k < charCounter+keyPair.chunkSize; ++j) {
- block.digits[j] = encryptObject[k++];
- block.digits[j] += encryptObject[k++] << 8;
- }
- var crypt = keyPair.barrett.powMod(block, keyPair.e);
- var text = keyPair.radix == 16 ? biToHex(crypt) : biToString(crypt, keyPair.radix);
- encrypted += text + " ";
- charCounter += keyPair.chunkSize;
- if (charCounter < encryptObject.length) {
- setTimeout(encryptChar, 1)
- } else {
- var encryptedencryptedString = encrypted.substring(0, encrypted.length - 1);
- if($.isFunction(callback)) {
- callback(encryptedString);
- } else {
- return encryptedString;
- }
- }
- }
- setTimeout(encryptChar, 1);
- }
- encryption(encrypt);
- };
- $.jCryption.defaultOptions = {
- submitElement:false,
- submitEvent:"click",
- getKeysURL:"main.php?generateKeypair=true",
- beforeEncryption:function(){return true},
- postVariable:"mywebsql_auth"
- };
- $.fn.jCryption = function(options) {
- return this.each(function(){
- (new $.jCryption(this, options));
- });
- };
- })(jQuery);
- /*
- * BigInt, a suite of routines for performing multiple-precision arithmetic in
- * JavaScript.
- * BarrettMu, a class for performing Barrett modular reduction computations in
- * JavaScript.
- *
- *
- * Copyright 1998-2005 David Shapiro.
- * dave@ohdave.com
- *
- * changed and improved by Daniel Griesser
- * http://www.jcryption.org/
- * Daniel Griesser <daniel.griesser@jcryption.org>
- */
- var biRadixBase = 2;
- var biRadixBits = 16;
- var bitsPerDigit = biRadixBits;
- var biRadix = 1 << 16;
- var biHalfRadix = biRadix >>> 1;
- var biRadixbiRadixSquared = biRadix * biRadix;
- var maxDigitVal = biRadix - 1;
- var maxInteger = 9999999999999998;
- var maxDigits;
- var ZERO_ARRAY;
- var bigZero, bigOne;
- var dpl10 = 15;
- var highBitMasks = new Array(0x0000, 0x8000, 0xC000, 0xE000, 0xF000, 0xF800,
- 0xFC00, 0xFE00, 0xFF00, 0xFF80, 0xFFC0, 0xFFE0,
- 0xFFF0, 0xFFF8, 0xFFFC, 0xFFFE, 0xFFFF);
- var hexatrigesimalToChar = new Array(
- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
- 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
- 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
- 'u', 'v', 'w', 'x', 'y', 'z'
- );
- var hexToChar = new Array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
- 'a', 'b', 'c', 'd', 'e', 'f');
- var lowBitMasks = new Array(0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F,
- 0x003F, 0x007F, 0x00FF, 0x01FF, 0x03FF, 0x07FF,
- 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF);
- function setMaxDigits(value) {
- maxDigits = value;
- ZERO_ARRAY = new Array(maxDigits);
- for (var iza = 0; iza < ZERO_ARRAY.length; iza++) ZERO_ARRAY[iza] = 0;
- bigZero = new BigInt();
- bigOne = new BigInt();
- bigOne.digits[0] = 1;
- }
- function BigInt(flag) {
- if (typeof flag == "boolean" && flag == true) {
- this.digits = null;
- }
- else {
- this.digits = ZERO_ARRAY.slice(0);
- }
- this.isNeg = false;
- }
- function biFromDecimal(s) {
- var isNeg = s.charAt(0) == '-';
- var i = isNeg ? 1 : 0;
- var result;
- while (i < s.length && s.charAt(i) == '0') ++i;
- if (i == s.length) {
- result = new BigInt();
- }
- else {
- var digitCount = s.length - i;
- var fgl = digitCount % dpl10;
- if (fgl == 0) fgl = dpl10;
- result = biFromNumber(Number(s.substr(i, fgl)));
- i += fgl;
- while (i < s.length) {
- result = biAdd(biMultiply(result, biFromNumber(1000000000000000)),
- biFromNumber(Number(s.substr(i, dpl10))));
- i += dpl10;
- }
- result.isNeg = isNeg;
- }
- return result;
- }
- function biCopy(bi) {
- var result = new BigInt(true);
- result.digits = bi.digits.slice(0);
- result.isNeg = bi.isNeg;
- return result;
- }
- function biFromNumber(i) {
- var result = new BigInt();
- result.isNeg = i < 0;
- i = Math.abs(i);
- var j = 0;
- while (i > 0) {
- result.digits[j++] = i & maxDigitVal;
- i >>= biRadixBits;
- }
- return result;
- }
- function reverseStr(s) {
- var result = "";
- for (var i = s.length - 1; i > -1; --i) {
- result += s.charAt(i);
- }
- return result;
- }
- function biToString(x, radix) {
- var b = new BigInt();
- b.digits[0] = radix;
- var qr = biDivideModulo(x, b);
- var result = hexatrigesimalToChar[qr[1].digits[0]];
- while (biCompare(qr[0], bigZero) == 1) {
- qr = biDivideModulo(qr[0], b);
- digit = qr[1].digits[0];
- result += hexatrigesimalToChar[qr[1].digits[0]];
- }
- return (x.isNeg ? "-" : "") + reverseStr(result);
- }
- function biToDecimal(x) {
- var b = new BigInt();
- b.digits[0] = 10;
- var qr = biDivideModulo(x, b);
- var result = String(qr[1].digits[0]);
- while (biCompare(qr[0], bigZero) == 1) {
- qr = biDivideModulo(qr[0], b);
- result += String(qr[1].digits[0]);
- }
- return (x.isNeg ? "-" : "") + reverseStr(result);
- }
- function digitToHex(n) {
- var mask = 0xf;
- var result = "";
- for (i = 0; i < 4; ++i) {
- result += hexToChar[n & mask];
- n >>>= 4;
- }
- return reverseStr(result);
- }
- function biToHex(x) {
- var result = "";
- var n = biHighIndex(x);
- for (var i = biHighIndex(x); i > -1; --i) {
- result += digitToHex(x.digits[i]);
- }
- return result;
- }
- function charToHex(c) {
- var ZERO = 48;
- var NINE = ZERO + 9;
- var littleA = 97;
- var littleZ = littleA + 25;
- var bigA = 65;
- var bigZ = 65 + 25;
- var result;
- if (c >= ZERO && c <= NINE) {
- result = c - ZERO;
- } else if (c >= bigA && c <= bigZ) {
- result = 10 + c - bigA;
- } else if (c >= littleA && c <= littleZ) {
- result = 10 + c - littleA;
- } else {
- result = 0;
- }
- return result;
- }
- function hexToDigit(s) {
- var result = 0;
- var sl = Math.min(s.length, 4);
- for (var i = 0; i < sl; ++i) {
- result <<= 4;
- result |= charToHex(s.charCodeAt(i))
- }
- return result;
- }
- function biFromHex(s) {
- var result = new BigInt();
- var ssl = s.length;
- for (var i = sl, j = 0; i > 0; i -= 4, ++j) {
- result.digits[j] = hexToDigit(s.substr(Math.max(i - 4, 0), Math.min(i, 4)));
- }
- return result;
- }
- function biFromString(s, radix) {
- var isNeg = s.charAt(0) == '-';
- var istop = isNeg ? 1 : 0;
- var result = new BigInt();
- var place = new BigInt();
- place.digits[0] = 1; // radix^0
- for (var i = s.length - 1; i >= istop; i--) {
- var c = s.charCodeAt(i);
- var digit = charToHex(c);
- var biDigit = biMultiplyDigit(place, digit);
- result = biAdd(result, biDigit);
- place = biMultiplyDigit(place, radix);
- }
- result.isNeg = isNeg;
- return result;
- }
- function biDump(b) {
- return (b.isNeg ? "-" : "") + b.digits.join(" ");
- }
- function biAdd(x, y) {
- var result;
- if (x.isNeg != y.isNeg) {
- y.isNeg = !y.isNeg;
- result = biSubtract(x, y);
- y.isNeg = !y.isNeg;
- }
- else {
- result = new BigInt();
- var c = 0;
- var n;
- for (var i = 0; i < x.digits.length; ++i) {
- n = x.digits[i] + y.digits[i] + c;
- result.digits[i] = n & 0xffff;
- c = Number(n >= biRadix);
- }
- result.isNeg = x.isNeg;
- }
- return result;
- }
- function biSubtract(x, y) {
- var result;
- if (x.isNeg != y.isNeg) {
- y.isNeg = !y.isNeg;
- result = biAdd(x, y);
- y.isNeg = !y.isNeg;
- } else {
- result = new BigInt();
- var n, c;
- c = 0;
- for (var i = 0; i < x.digits.length; ++i) {
- n = x.digits[i] - y.digits[i] + c;
- result.digits[i] = n & 0xffff;
- if (result.digits[i] < 0) result.digits[i] += biRadix;
- c = 0 - Number(n < 0);
- }
- if (c == -1) {
- c = 0;
- for (var i = 0; i < x.digits.length; ++i) {
- n = 0 - result.digits[i] + c;
- result.digits[i] = n & 0xffff;
- if (result.digits[i] < 0) result.digits[i] += biRadix;
- c = 0 - Number(n < 0);
- }
- result.isNeg = !x.isNeg;
- } else {
- result.isNeg = x.isNeg;
- }
- }
- return result;
- }
- function biHighIndex(x) {
- var result = x.digits.length - 1;
- while (result > 0 && x.digits[result] == 0) --result;
- return result;
- }
- function biNumBits(x) {
- var n = biHighIndex(x);
- var d = x.digits[n];
- var m = (n + 1) * bitsPerDigit;
- var result;
- for (result = m; result > m - bitsPerDigit; --result) {
- if ((d & 0x8000) != 0) break;
- d <<= 1;
- }
- return result;
- }
- function biMultiply(x, y) {
- var result = new BigInt();
- var c;
- var n = biHighIndex(x);
- var t = biHighIndex(y);
- var u, uv, k;
- for (var i = 0; i <= t; ++i) {
- c = 0;
- k = i;
- for (j = 0; j <= n; ++j, ++k) {
- uv = result.digits[k] + x.digits[j] * y.digits[i] + c;
- result.digits[k] = uv & maxDigitVal;
- c = uv >>> biRadixBits;
- }
- result.digits[i + n + 1] = c;
- }
- result.isNeg = x.isNeg != y.isNeg;
- return result;
- }
- function biMultiplyDigit(x, y) {
- var n, c, uv;
- result = new BigInt();
- n = biHighIndex(x);
- c = 0;
- for (var j = 0; j <= n; ++j) {
- uv = result.digits[j] + x.digits[j] * y + c;
- result.digits[j] = uv & maxDigitVal;
- c = uv >>> biRadixBits;
- }
- result.digits[1 + n] = c;
- return result;
- }
- function arrayCopy(src, srcStart, dest, destStart, n) {
- var m = Math.min(srcStart + n, src.length);
- for (var i = srcStart, j = destStart; i < m; ++i, ++j) {
- dest[j] = src[i];
- }
- }
- function biShiftLeft(x, n) {
- var digitCount = Math.floor(n / bitsPerDigit);
- var result = new BigInt();
- arrayCopy(x.digits, 0, result.digits, digitCount,result.digits.length - digitCount);
- var bits = n % bitsPerDigit;
- var rightBits = bitsPerDigit - bits;
- for (var i = result.digits.length - 1, ii1 = i - 1; i > 0; --i, --i1) {
- result.digits[i] = ((result.digits[i] << bits) & maxDigitVal) |
- ((result.digits[i1] & highBitMasks[bits]) >>>
- (rightBits));
- }
- result.digits[0] = ((result.digits[i] << bits) & maxDigitVal);
- result.isNeg = x.isNeg;
- return result;
- }
- function biShiftRight(x, n) {
- var digitCount = Math.floor(n / bitsPerDigit);
- var result = new BigInt();
- arrayCopy(x.digits, digitCount, result.digits, 0,x.digits.length - digitCount);
- var bits = n % bitsPerDigit;
- var leftBits = bitsPerDigit - bits;
- for (var i = 0, ii1 = i + 1; i < result.digits.length - 1; ++i, ++i1) {
- result.digits[i] = (result.digits[i] >>> bits) |
- ((result.digits[i1] & lowBitMasks[bits]) << leftBits);
- }
- result.digits[result.digits.length - 1] >>>= bits;
- result.isNeg = x.isNeg;
- return result;
- }
- function biMultiplyByRadixPower(x, n) {
- var result = new BigInt();
- arrayCopy(x.digits, 0, result.digits, n, result.digits.length - n);
- return result;
- }
- function biDivideByRadixPower(x, n)
- {
- var result = new BigInt();
- arrayCopy(x.digits, n, result.digits, 0, result.digits.length - n);
- return result;
- }
- function biModuloByRadixPower(x, n)
- {
- var result = new BigInt();
- arrayCopy(x.digits, 0, result.digits, 0, n);
- return result;
- }
- function biCompare(x, y) {
- if (x.isNeg != y.isNeg) {
- return 1 - 2 * Number(x.isNeg);
- }
- for (var i = x.digits.length - 1; i >= 0; --i) {
- if (x.digits[i] != y.digits[i]) {
- if (x.isNeg) {
- return 1 - 2 * Number(x.digits[i] > y.digits[i]);
- } else {
- return 1 - 2 * Number(x.digits[i] < y.digits[i]);
- }
- }
- }
- return 0;
- }
- function biDivideModulo(x, y) {
- var nb = biNumBits(x);
- var tb = biNumBits(y);
- var origYIsNeg = y.isNeg;
- var q, r;
- if (nb < tb) {
- if (x.isNeg) {
- q = biCopy(bigOne);
- q.isNeg = !y.isNeg;
- x.isNeg = false;
- y.isNeg = false;
- r = biSubtract(y, x);
- x.isNeg = true;
- y.isNeg = origYIsNeg;
- } else {
- q = new BigInt();
- r = biCopy(x);
- }
- return new Array(q, r);
- }
- q = new BigInt();
- r = x;
- var t = Math.ceil(tb / bitsPerDigit) - 1;
- var lambda = 0;
- while (y.digits[t] < biHalfRadix) {
- y = biShiftLeft(y, 1);
- ++lambda;
- ++tb;
- t = Math.ceil(tb / bitsPerDigit) - 1;
- }
- r = biShiftLeft(r, lambda);
- nb += lambda;
- var n = Math.ceil(nb / bitsPerDigit) - 1;
- var b = biMultiplyByRadixPower(y, n - t);
- while (biCompare(r, b) != -1) {
- ++q.digits[n - t];
- r = biSubtract(r, b);
- }
- for (var i = n; i > t; --i) {
- var ri = (i >= r.digits.length) ? 0 : r.digits[i];
- var ri1 = (i - 1 >= r.digits.length) ? 0 : r.digits[i - 1];
- var ri2 = (i - 2 >= r.digits.length) ? 0 : r.digits[i - 2];
- var yt = (t >= y.digits.length) ? 0 : y.digits[t];
- var yt1 = (t - 1 >= y.digits.length) ? 0 : y.digits[t - 1];
- if (ri == yt) {
- q.digits[i - t - 1] = maxDigitVal;
- } else {
- q.digits[i - t - 1] = Math.floor((ri * biRadix + ri1) / yt);
- }
- var c1 = q.digits[i - t - 1] * ((yt * biRadix) + yt1);
- var c2 = (ri * biRadixSquared) + ((ri1 * biRadix) + ri2);
- while (c1 > c2) {
- --q.digits[i - t - 1];
- c1 = q.digits[i - t - 1] * ((yt * biRadix) | yt1);
- c2 = (ri * biRadix * biRadix) + ((ri1 * biRadix) + ri2);
- }
- b = biMultiplyByRadixPower(y, i - t - 1);
- r = biSubtract(r, biMultiplyDigit(b, q.digits[i - t - 1]));
- if (r.isNeg) {
- r = biAdd(r, b);
- --q.digits[i - t - 1];
- }
- }
- r = biShiftRight(r, lambda);
- q.isNeg = x.isNeg != origYIsNeg;
- if (x.isNeg) {
- if (origYIsNeg) {
- q = biAdd(q, bigOne);
- } else {
- q = biSubtract(q, bigOne);
- }
- y = biShiftRight(y, lambda);
- r = biSubtract(y, r);
- }
- if (r.digits[0] == 0 && biHighIndex(r) == 0) r.isNeg = false;
- return new Array(q, r);
- }
- function biDivide(x, y) {
- return biDivideModulo(x, y)[0];
- }
- function biModulo(x, y) {
- return biDivideModulo(x, y)[1];
- }
- function biMultiplyMod(x, y, m) {
- return biModulo(biMultiply(x, y), m);
- }
- function biPow(x, y) {
- var result = bigOne;
- var a = x;
- while (true) {
- if ((y & 1) != 0) result = biMultiply(result, a);
- y >>= 1;
- if (y == 0) break;
- a = biMultiply(a, a);
- }
- return result;
- }
- function biPowMod(x, y, m) {
- var result = bigOne;
- var a = x;
- var k = y;
- while (true) {
- if ((k.digits[0] & 1) != 0) result = biMultiplyMod(result, a, m);
- k = biShiftRight(k, 1);
- if (k.digits[0] == 0 && biHighIndex(k) == 0) break;
- a = biMultiplyMod(a, a, m);
- }
- return result;
- }
- function BarrettMu(m) {
- this.modulus = biCopy(m);
- this.k = biHighIndex(this.modulus) + 1;
- var b2k = new BigInt();
- b2k.digits[2 * this.k] = 1;
- this.mu = biDivide(b2k, this.modulus);
- this.bkplus1 = new BigInt();
- this.bkplus1.digits[this.k + 1] = 1;
- this.modulo = BarrettMu_modulo;
- this.multiplyMod = BarrettMu_multiplyMod;
- this.powMod = BarrettMu_powMod;
- }
- function BarrettMu_modulo(x) {
- var q1 = biDivideByRadixPower(x, this.k - 1);
- var q2 = biMultiply(q1, this.mu);
- var q3 = biDivideByRadixPower(q2, this.k + 1);
- var r1 = biModuloByRadixPower(x, this.k + 1);
- var r2term = biMultiply(q3, this.modulus);
- var r2 = biModuloByRadixPower(r2term, this.k + 1);
- var r = biSubtract(r1, r2);
- if (r.isNeg) {
- r = biAdd(r, this.bkplus1);
- }
- var rgtem = biCompare(r, this.modulus) >= 0;
- while (rgtem) {
- r = biSubtract(r, this.modulus);
- rgtem = biCompare(r, this.modulus) >= 0;
- }
- return r;
- }
- function BarrettMu_multiplyMod(x, y) {
- var xy = biMultiply(x, y);
- return this.modulo(xy);
- }
- function BarrettMu_powMod(x, y) {
- var result = new BigInt();
- result.digits[0] = 1;
- while (true) {
- if ((y.digits[0] & 1) != 0) result = this.multiplyMod(result, x);
- y = biShiftRight(y, 1);
- if (y.digits[0] == 0 && biHighIndex(y) == 0) break;
- x = this.multiplyMod(x, x);
- }
- return result;
- }
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