EncryptionService.ts

// encryptionService
import * as config from '../config/EncryptionConfig'
import * as sodium from 'sodium-native';
import * as md5 from 'md5';
import * as crypto from 'crypto';
export class EncryptionService {
    public nonce: number = 0;
    public timeout: number;
    public lastRequest: number;
    private sodium: any;
    private publicKey: any;
    private privateKey: any;
constructor() {
        // this.nonce = Math.random() * 256 * 256 * 256 | 0;
        this.nonce = Math.random() * (1 << 30) | 0;
    }
public signMessage(message: Buffer): Buffer {
        let signedMessage = Buffer.alloc(sodium.crypto_sign_BYTES + message.length);
        sodium.crypto_sign(signedMessage, message, Buffer.from(config.encryptionConfig.ChaChaSigPrivateKey, 'base64'));
        return signedMessage;
    }
public signOpenMessage(signedMessage: Buffer) {
        let message = Buffer.alloc(signedMessage.length - sodium.crypto_sign_BYTES);
        sodium.crypto_sign_open(message, signedMessage, this.publicKey);
        return message;
    }
}