image-encryption.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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};
var __generator = (this && this.__generator) || function (thisArg, body) {
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};
var ImageEncryption = /** @class */ (function () {
    function ImageEncryption(password) {
        this.hashKey = [];
        this.totalHash = 0;
        this.sha512 = sha512;
        this.MersenneTwister = MersenneTwister;
        this.createHashByPassword(password);
        this.sbox = this.createSBox();
        this.mixSBoxByHashKey();
        for (var i = 0; i < 255; i++) {
            var coordinations = this.getCoordinationByDecimal(i);
            var newNumber = this.generateRandomNumberForSBox(i, i + 1, 255);
            var newCoordinations = this.getCoordinationByDecimal(newNumber);
            var tempVal = this.sbox[coordinations[0]][coordinations[1]];
            this.sbox[coordinations[0]][coordinations[1]] = this.sbox[newCoordinations[0]][newCoordinations[1]];
            this.sbox[newCoordinations[0]][newCoordinations[1]] = tempVal;
        }
    }
    ImageEncryption.prototype.createHashByPassword = function (password) {
        this.totalHash = 1;
        this.hashKey = this.sha512.sha512(password).split("");
        for (var i = 0; i < this.hashKey.length; i++) {
            this.totalHash *= parseInt(this.hashKey[i], 16);
        }
    };
    ImageEncryption.prototype.createSBox = function () {
        var counter = 0;
        var a = [];
        for (var i = 0; i < 16; i++) {
            var b = [];
            for (var k = 0; k < 16; k++) {
                b.push(counter);
                counter++;
            }
            a.push(b);
        }
        return a;
    };
    ImageEncryption.prototype.getSBox = function () {
        return this.sbox;
    };
    ImageEncryption.prototype.reverseSBox = function () {
        var newSBox = this.createSBox();
        for (var i = 0; i < 16; i++) {
            for (var k = 0; k < 16; k++) {
                var hexX = this.decToHex(i, false);
                var hexY = this.decToHex(k, false);
                var decimalXY = this.hexToDec(hexX[0] + hexY[0]);
                var coordination = this.getCoordinationByDecimal(this.sbox[i][k]);
                newSBox[coordination[0]][coordination[1]] = decimalXY;
            }
        }
        return newSBox;
    };
    ImageEncryption.prototype.decryptionImage = function (imageData) {
        return __awaiter(this, void 0, void 0, function () {
            var _this = this;
            return __generator(this, function (_a) {
                return [2 /*return*/, new Promise(function (resolve, reject) {
                        try {
                            var reverseSBox = _this.reverseSBox();
                            var data = imageData.data;
                            for (var i = 0; i < data.length; i += 4) {
                                var ranNumberForX = _this.generateRandomNumberForSBox(i, 0, 15);
                                var ranNumberForY = _this.generateRandomNumberForSBox(i + 2, 0, 15);
                                var red = _this.sbox[ranNumberForX][ranNumberForY] ^ data[i];
                                var green = _this.sbox[ranNumberForX][ranNumberForY] ^ data[i + 1];
                                var blue = _this.sbox[ranNumberForX][ranNumberForY] ^ data[i + 2];
                                var coordinationRed = _this.getCoordinationByDecimal(red);
                                var coordinationGreen = _this.getCoordinationByDecimal(green);
                                var coordinationBlue = _this.getCoordinationByDecimal(blue);
                                data[i] = reverseSBox[coordinationRed[0]][coordinationRed[1]];
                                data[i + 1] = reverseSBox[coordinationGreen[0]][coordinationGreen[1]];
                                data[i + 2] = reverseSBox[coordinationBlue[0]][coordinationBlue[1]];
                            }
                            resolve(imageData);
                        }
                        catch (e) {
                            reject(e);
                        }
                    })];
            });
        });
    };
    ImageEncryption.prototype.encryptionImage = function (imageData) {
        return __awaiter(this, void 0, void 0, function () {
            var _this = this;
            return __generator(this, function (_a) {
                return [2 /*return*/, new Promise(function (resolve, reject) {
                        try {
                            var data = imageData.data;
                            for (var i = 0; i < data.length; i += 4) {
                                var ranNumberForX = _this.generateRandomNumberForSBox(i, 0, 15);
                                var ranNumberForY = _this.generateRandomNumberForSBox(i + 2, 0, 15);
                                var coordinationRed = _this.getCoordinationByDecimal(data[i]);
                                var coordinationGreen = _this.getCoordinationByDecimal(data[i + 1]);
                                var coordinationBlue = _this.getCoordinationByDecimal(data[i + 2]);
                                data[i] = _this.sbox[ranNumberForX][ranNumberForY] ^ _this.sbox[coordinationRed[0]][coordinationRed[1]];
                                data[i + 1] = _this.sbox[ranNumberForX][ranNumberForY] ^ _this.sbox[coordinationGreen[0]][coordinationGreen[1]];
                                data[i + 2] = _this.sbox[ranNumberForX][ranNumberForY] ^ _this.sbox[coordinationBlue[0]][coordinationBlue[1]];
                            }
                            resolve(imageData);
                        }
                        catch (e) {
                            reject(e);
                        }
                    })];
            });
        });
    };
    ImageEncryption.prototype.changeSBoxRow = function (x, y) {
        for (var i = 0; i < 16; i++) {
            var tempX = this.sbox[x][i];
            var tempY = this.sbox[y][i];
            this.sbox[x][i] = tempY;
            this.sbox[y][i] = tempX;
        }
    };
    ImageEncryption.prototype.changeSBoxColumn = function (x, y) {
        for (var i = 0; i < 16; i++) {
            var tempX = this.sbox[i][x];
            var tempY = this.sbox[i][y];
            this.sbox[i][x] = tempY;
            this.sbox[i][y] = tempX;
        }
    };
    ImageEncryption.prototype.mixSBoxByHashKey = function () {
        var counter = 1;
        for (var i = 0; i < 128; i += 2) {
            var x = parseInt(this.hashKey[i], 16);
            var y = parseInt(this.hashKey[i + 1], 16);
            if (counter % 2 === 0) {
                this.changeSBoxRow(x, y);
            }
            else {
                this.changeSBoxColumn(x, y);
            }
            counter++;
        }
    };
    ImageEncryption.prototype.hexToDec = function (value) {
        return parseInt(value, 16);
    };
    ImageEncryption.prototype.decToHex = function (value, isDouble) {
        if (isDouble === void 0) { isDouble = true; }
        var hex = value.toString(16).split('');
        if (isDouble && hex.length <= 1) {
            return [
                "0",
                hex[0]
            ];
        }
        return hex;
    };
    ImageEncryption.prototype.getCoordinationByDecimal = function (value) {
        var coordinations = [];
        var hex = this.decToHex(value);
        coordinations.push(this.hexToDec(hex[0]), this.hexToDec(hex[1]));
        return coordinations;
    };
    ImageEncryption.prototype.generateRandomNumberForSBox = function (index, min, max) {
        var generator = new this.MersenneTwister(index + this.totalHash);
        return Math.floor(generator.random() * (max - min + 1)) + min;
    };
    return ImageEncryption;
}());