lss-mqtt/dist/lib/coder.js

LSS-MQTT framework in NodeJS implementation"

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const crypto_1 = require("crypto");
class Coder {
    constructor(password, textCoding = 'ascii', cipherCoding = 'hex') {
        this.password = password;
        this.textCoding = textCoding;
        this.cipherCoding = cipherCoding;
        this.algorithm = 'chacha20-poly1305';
        this.iv = Buffer.alloc(12, 0);
        this.cipher = crypto_1.createCipheriv(this.algorithm, this.password, this.iv, { authTagLength: 16 });
        this.decipher = crypto_1.createDecipheriv(this.algorithm, this.password, this.iv, { authTagLength: 16 });
    }
    encode(data) {
        this.cipher = crypto_1.createCipheriv(this.algorithm, this.password, this.iv, { authTagLength: 16 });
        return this.cipher.update(data, this.textCoding, this.cipherCoding);
    }
    decode(cipher) {
        this.decipher = crypto_1.createDecipheriv(this.algorithm, this.password, this.iv, { authTagLength: 16 });
        return this.decipher.update(cipher, this.cipherCoding, this.textCoding);
    }
}
exports.Coder = Coder;
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