Skip to main content

Encryption Decryption a String in Angular 7 or 8 or 9 - CryptoJS, TypeScript

How to use CryptoJS for data secure using Encryption Decryption in Angular?
Follow the below steps to achieve this Encryption/Decryption Angular 7, 8 or 9
1.      Install CryptoJS using below commands in your project directory
2.      Add script ../node_modules/crypto-js/crypto-js.js” in your “angular.json” file’s scripts array.
3.      Create a service class “EncrDecrService” for encrypts and decrypts get/set methods and import “CryptoJS” in the service for using encrypt and decrypt get/set methods.
4.      Import this service class “EncrDecrService” in the angular module class “NgModule” and then add this service in the providers.
5.      Finally, use your encrypted and decrypted service methods in your component class.
6.      Result in your application browser console.

Example: See the example in detail step-to-step.

Steps 1 – Install CryptoJS using below NPM commands in your project directory

npm install crypto-js --save
npm install @types/crypto-js –save

After installing both above commands it looks like

NPM Command 1 -> npm install crypto-js --save

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
+ crypto-js@3.1.9-1
added 1 package from 1 contributor and audited 40178 packages in 9.958s
found 0 vulnerabilities

NPM Command 2 -> npm install @types/crypto-js --save

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
+ @types/crypto-js@3.1.43
added 1 package from 1 contributor and audited 40179 packages in 11.549s
found 0 vulnerabilities

Steps 2 - Add the script path in “angular.json” file.

"scripts": [
              "../node_modules/crypto-js/crypto-js.js"
            ]

Steps 3 – Create a service class “EncrDecrService” for encrypts and decrypts get/set methods.
Import “CryptoJS” in the service for using encrypt and decrypt get/set methods.

import { Injectable } from '@angular/core';
import * as CryptoJS from 'crypto-js';

@Injectable({
  providedIn: 'root'
})

export class EncrDecrService {
  constructor() { }
 
  //The set method is use for encrypt the value.
  set(keys, value){
    var key = CryptoJS.enc.Utf8.parse(keys);
    var iv = CryptoJS.enc.Utf8.parse(keys);
    var encrypted = CryptoJS.AES.encrypt(CryptoJS.enc.Utf8.parse(value.toString()), key,
    {
        keySize: 128 / 8,
        iv: iv,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
    });

    return encrypted.toString();
  }

  //The get method is use for decrypt the value.
  get(keys, value){
    var key = CryptoJS.enc.Utf8.parse(keys);
    var iv = CryptoJS.enc.Utf8.parse(keys);
    var decrypted = CryptoJS.AES.decrypt(value, key, {
        keySize: 128 / 8,
        iv: iv,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
    });

    return decrypted.toString(CryptoJS.enc.Utf8);
  }
}

Steps 4 - Import this service class “EncrDecrService” in the angular module class “NgModule” and then add this service in the providers.


import {EncrDecrService} from '../app/EncrDecr/encr-decr.service';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule
  ],
  providers: [EncrDecrService],
  bootstrap: [AppComponent]
})
export class AppModule { }


Steps 5 - Finally, use your encrypted and decrypted service methods in your component class.

import { Component, OnInit } from '@angular/core';
import {EncrDecrService} from '../EncrDecr/encr-decr.service';

@Component({
  selector: 'app_user',
  templateUrl: './user.component.html',
  styleUrls: ['./user.component.css']
})
export class UserComponent implements OnInit {

  constructor(private EncrDecr: EncrDecrService) {   }

  ngOnInit() {
    var encrypted = this.EncrDecr.set('123456$#@$^@1ERF', 'password@123456');
    var decrypted = this.EncrDecr.get('123456$#@$^@1ERF', encrypted);
   
    console.log('Encrypted :' + encrypted);
    console.log('Encrypted :' + decrypted);
  }
}

Steps 6 - See the output in your application browser's console


By Anil Singh | Rating of this article (*****)

Popular posts from this blog

39 Best Object Oriented JavaScript Interview Questions and Answers

Most Popular 37 Key Questions for JavaScript Interviews. What is Object in JavaScript? What is the Prototype object in JavaScript and how it is used? What is "this"? What is its value? Explain why "self" is needed instead of "this". What is a Closure and why are they so useful to us? Explain how to write class methods vs. instance methods. Can you explain the difference between == and ===? Can you explain the difference between call and apply? Explain why Asynchronous code is important in JavaScript? Can you please tell me a story about JavaScript performance problems? Tell me your JavaScript Naming Convention? How do you define a class and its constructor? What is Hoisted in JavaScript? What is function overloadin

List of Countries, Nationalities and their Code In Excel File

Download JSON file for this List - Click on JSON file    Countries List, Nationalities and Code Excel ID Country Country Code Nationality Person 1 UNITED KINGDOM GB British a Briton 2 ARGENTINA AR Argentinian an Argentinian 3 AUSTRALIA AU Australian an Australian 4 BAHAMAS BS Bahamian a Bahamian 5 BELGIUM BE Belgian a Belgian 6 BRAZIL BR Brazilian a Brazilian 7 CANADA CA Canadian a Canadian 8 CHINA CN Chinese a Chinese 9 COLOMBIA CO Colombian a Colombian 10 CUBA CU Cuban a Cuban 11 DOMINICAN REPUBLIC DO Dominican a Dominican 12 ECUADOR EC Ecuadorean an Ecuadorean 13 EL SALVADOR

25 Best Vue.js 2 Interview Questions and Answers

What Is Vue.js? The Vue.js is a progressive JavaScript framework and used to building the interactive user interfaces and also it’s focused on the view layer only (front end). The Vue.js is easy to integrate with other libraries and others existing projects. Vue.js is very popular for Single Page Applications developments. The Vue.js is lighter, smaller in size and so faster. It also supports the MVVM ( Model-View-ViewModel ) pattern. The Vue.js is supporting to multiple Components and libraries like - ü   Tables and data grids ü   Notifications ü   Loader ü   Calendar ü   Display time, date and age ü   Progress Bar ü   Tooltip ü   Overlay ü   Icons ü   Menu ü   Charts ü   Map ü   Pdf viewer ü   And so on The Vue.js was developed by “ Evan You ”, an Ex Google software engineer. The latest version is Vue.js 2. The Vue.js 2 is very similar to Angular because Evan You was inspired by Angular and the Vue.js 2 components looks like -

React | Encryption and Decryption Data/Text using CryptoJs

To encrypt and decrypt data, simply use encrypt () and decrypt () function from an instance of crypto-js. Node.js (Install) Requirements: 1.       Node.js 2.       npm (Node.js package manager) 3.       npm install crypto-js npm   install   crypto - js Usage - Step 1 - Import var   CryptoJS  =  require ( "crypto-js" ); Step 2 - Encrypt    // Encrypt    var   ciphertext  =  CryptoJS . AES . encrypt ( JSON . stringify ( data ),  'my-secret-key@123' ). toString (); Step 3 -Decrypt    // Decrypt    var   bytes  =  CryptoJS . AES . decrypt ( ciphertext ,  'my-secret-key@123' );    var   decryptedData  =  JSON . parse ( bytes . toString ( CryptoJS . enc . Utf8 )); As an Example,   import   React   from   'react' ; import   './App.css' ; //Including all libraries, for access to extra methods. var   CryptoJS  =  require ( "crypto-js" ); function   App () {    var   data

.NET Core MVC Interview Questions and Answers

» OOPs Interview Questions Object Oriented Programming (OOP) is a technique to think a real-world in terms of objects. This is essentially a design philosophy that uses a different set of programming languages such as C#... Posted In .NET » .Net Constructor Interview Questions A class constructor is a special member function of a class that is executed whenever we create new objects of that class. When a class or struct is created, its constructor is called. A constructor has exactly the same name as that of class and it does not have any return type… Posted In .NET » .NET Delegates Interview Questions Delegates are used to define callback methods and implement event handling, and they are declared using the "delegate" keyword. A delegate in C# is similar to function pointers of C++, but C# delegates are type safe… Posted In .NET » ASP.Net C# Interview Questions C# was developed by Microsoft and is used in essentially all of their products. It is mainly used for