Firman Ramdhani
a1db9b93e1
- Implement DateUtils for handling date operations with timezone support. - Add unit tests for DateUtils to ensure functionality and edge cases. - Create StringUtils for string manipulation with a fluent API. - Include unit tests for StringUtils covering various string operations. - Introduce EncryptionUtils for secure data encryption and decryption. - Add tests for EncryptionUtils to validate encryption and decryption processes. - Update index.ts to export new utility modules. - Introduce encryption key management with a dedicated key file.
77 lines
1.9 KiB
TypeScript
77 lines
1.9 KiB
TypeScript
import { AES, enc } from 'crypto-js';
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import { ENC_STORAGE_KEY } from './encryption-key';
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/**
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* Interface defining encryption service methods.
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*/
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interface IEncryptionUtils {
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encrypt(data: string): string;
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decrypt(encryptedData: string): string;
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}
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export class EncryptionUtils implements IEncryptionUtils {
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private readonly _key: string;
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/**
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* @param key - Encryption key used for encrypting and decrypting data.
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* If not provided, defaults to ENC_STORAGE_KEY.
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*/
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constructor(key: string = ENC_STORAGE_KEY) {
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if (!key) {
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throw new Error('[EncryptionUtils] Encryption key is missing/empty.');
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}
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this._key = key;
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}
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/**
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* Encrypts the given data string.
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* Returns an empty string '' if input data is empty.
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*/
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public encrypt(data: string): string {
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if (!data) {
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return '';
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}
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return AES.encrypt(data, this._key).toString();
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}
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/**
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* Decrypts the given encrypted data string.
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* Returns an empty string '' if input is empty or decryption fails.
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*/
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public decrypt(encryptedData: string): string {
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if (!encryptedData) {
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return '';
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}
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try {
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const bytes = AES.decrypt(encryptedData, this._key);
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const originalText = bytes.toString(enc.Utf8);
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// If decryption yields an empty string, consider it a failure
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if (!originalText) {
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return '';
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}
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return originalText;
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} catch (error) {
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console.error('[EncryptionUtils] Decryption failed:', error);
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return '';
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}
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}
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/**
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* Get the singleton instance of EncryptionUtils.
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* Uses the default ENC_STORAGE_KEY.
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* @return EncryptionUtils instance
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*/
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private static instance: EncryptionUtils;
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public static getInstance(): EncryptionUtils {
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if (!EncryptionUtils.instance) {
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EncryptionUtils.instance = new EncryptionUtils();
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}
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return EncryptionUtils.instance;
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}
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}
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