@mahdi.golzar/encripttool/index.js

EncryptionTool is a simple utility for encrypting and decrypting data using symmetric encryption algorithms. It provides an easy interface to securely encrypt sensitive data and later decrypt it.

import crypto from 'crypto';

class EncryptionTool {
    constructor(algorithm = 'aes-256-cbc', key) {
        if (!key) {
            throw new Error('A key is required');
        }
        this.algorithm = algorithm;
        this.key = crypto.scryptSync(key, 'salt', 32)
        this.ivLength = 16
    }

    encrypt(text) {
        const InitializationVector = crypto.randomBytes(this.ivLength)
        const cipher = crypto.createCipheriv(this.algorithm, this.key, InitializationVector)
        let encrypted = cipher.update(text, 'utf8', 'hex')
        encrypted += cipher.final('hex')
        return `${InitializationVector.toString('hex')}:${encrypted}`;
    }

    decrypt(encryptedText) {
        const [iv, encrypted] = encryptedText.split(':');
        const decipher = crypto.createDecipheriv(this.algorithm, this.key, Buffer.from(iv, 'hex'));
        let decrypted = decipher.update(encrypted, 'hex', 'utf8');
        decrypted += decipher.final('utf8');
        return decrypted;
    }
}