Viewing File: /home/ubuntu/efiexchange-node-base/src/utils/decrypt.ts

import crypto from 'crypto';
import { Request, Response } from 'express';

export const decrypt = async (encrypted: string, key: string, iv: string) => {
    try {
        const encryptedBuffer = Buffer.from(encrypted, 'hex');
        const keyBuffer = Buffer.from(key, 'hex');
        const ivBuffer = Buffer.from(iv, 'hex');

        if (keyBuffer.length !== 32) throw new Error('Key must be 32 bytes');
        if (ivBuffer.length !== 16) throw new Error('IV must be 16 bytes');

        const decipher = crypto.createDecipheriv('aes-256-cbc', keyBuffer, ivBuffer);
        let decrypted = decipher.update(encryptedBuffer, undefined, 'utf8');
        decrypted += decipher.final('utf8');

        return decrypted;
    } catch (err) {
        console.error('Decryption failed:', err.message);
        return null;
    }
};

export const encrypt = async (req: Request, res: Response) => {
    try {
        const algorithm = 'aes-256-cbc';
        const key = crypto.randomBytes(32); // 256-bit key
        const iv = crypto.randomBytes(16);  // 128-bit IV
        const cipher = crypto.createCipheriv(algorithm, key, iv);
        let encrypted = cipher.update(req.body.text, 'utf-8', 'hex');
        encrypted += cipher.final('hex');
        return res.sendResponse({ encrypted, key: key.toString('hex'), iv: iv.toString('hex') }, '200');
    } catch (error: any) {
        return res.sendError(error.message);
    }
}