xiot-core-xcp-ts

Version:
XCP Protocol
27 lines (26 loc) • 1.01 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.WebSocketBinaryFrameCodecImpl = void 0;
const chacha20poly1305_1 = require("@stablelib/chacha20poly1305");
const buffer_1 = require("buffer");
class WebSocketBinaryFrameCodecImpl {
    constructor(deviceToServer, serverToDevice) {
        this.deviceToServer = deviceToServer;
        this.serverToDevice = serverToDevice;
        this.inCount = 0;
        this.outCount = 0;
    }
    encrypt(data) {
        const cc = new chacha20poly1305_1.ChaCha20Poly1305(this.deviceToServer);
        const nonce = new buffer_1.Buffer(8);
        nonce.writeInt32LE(this.inCount++, 0);
        return cc.seal(nonce, data);
    }
    decrypt(data) {
        const cc = new chacha20poly1305_1.ChaCha20Poly1305(this.serverToDevice);
        const nonce = new buffer_1.Buffer(8);
        nonce.writeInt32LE(this.outCount++, 0);
        return cc.open(nonce, data);
    }
}
exports.WebSocketBinaryFrameCodecImpl = WebSocketBinaryFrameCodecImpl;