Encryption and Decryption

Question

How to Encrypt value in Typescript and Decrypt in c#

Amit Mohanty · Answer

You'll need to install CryptoJS in your TypeScript project. You can do this via npm: npm install crypto-js //Inside imports of your TS file include import * as CryptoJS from 'crypto-js'; // Declare this key and iv values in declaration private key = CryptoJS.enc.Utf8.parse('4512631236589784'); private iv = CryptoJS.enc.Utf8.parse('4512631236589784'); // Methods for the encrypt and decrypt Using AES encryptUsingAES256() { var encrypted = CryptoJS.AES.encrypt(CryptoJS.enc.Utf8.parse(JSON.stringify("Your Json Object data or string")), this.key, { keySize: 128 / 8, iv: this.iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 }); console.log('Encrypted :' + encrypted); this.decryptUsingAES256(encrypted); return encrypted; } decryptUsingAES256(decString) { var decrypted = CryptoJS.AES.decrypt(decString, this.key, { keySize: 128 / 8, iv: this.iv, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 }); console.log('Decrypted : ' + decrypted); console.log('utf8 = ' + decrypted.toString(CryptoJS.enc.Utf8)); } The C# code to encode or decode is here. public class encryption { public static string DecryptStringAES(string cipherText) { var keybytes = Encoding.UTF8.GetBytes("4512631236589784"); var iv = Encoding.UTF8.GetBytes("4512631236589784"); var encrypted = Convert.FromBase64String(cipherText); var decriptedFromJavascript = DecryptStringFromBytes(encrypted, keybytes, iv); return decriptedFromJavascript; } private static string DecryptStringFromBytes(byte[] cipherText, byte[] key, byte[] iv) { if (cipherText == null || cipherText.Length

Dhiraj Poojary · Answer

You can find assistance on encrypting a string in TypeScript and decrypting it in C# using advanced encryption in the following Stack Overflow thread: https://stackoverflow.com/questions/41671267/encrypt-the-string-in-typescript-and-decrypt-in-c-sharp-using-advanced-encryptio#:~:text=npm%20instal%20crypto%2Djs

Tuhin Paul · Answer

Encrypting a value in TypeScript and decrypting it in C# involves using a common encryption algorithm that is supported in both environments. One such algorithm is AES (Advanced Encryption Standard). I'll provide a basic example using AES encryption with CryptoJS in TypeScript and decryption with C#. import * as CryptoJS from 'crypto-js'; // Encrypt function function encryptValue(value: string, secretKey: string): string { const ciphertext = CryptoJS.AES.encrypt(value, secretKey).toString(); return ciphertext; } // Example usage const valueToEncrypt = 'Hello, World!'; const secretKey = 'YourSecretKey'; const encryptedValue = encryptValue(valueToEncrypt, secretKey); console.log('Encrypted Value:', encryptedValue); using System; using System.Security.Cryptography; using System.Text; class Program { static void Main() { string encryptedValue = "YourEncryptedValue"; string secretKey = "YourSecretKey"; string decryptedValue = Decrypt(encryptedValue, secretKey); Console.WriteLine("Decrypted Value: " + decryptedValue); } // Decrypt function static string Decrypt(string encryptedText, string key) { using (Aes aesAlg = Aes.Create()) { aesAlg.Key = Encoding.UTF8.GetBytes(key); aesAlg.IV = new byte[16]; // Initialization Vector, you may need to handle this more securely in production. ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV); using (MemoryStream msDecrypt = new MemoryStream(Convert.FromBase64String(encryptedText))) { using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)) { using (StreamReader srDecrypt = new StreamReader(csDecrypt)) { return srDecrypt.ReadToEnd(); } } } } } } In C#, the Aes class from System.Security.Cryptography is used for decryption. Ensure you handle the secret key securely in your application. The Initialization Vector ( IV ) should also be handled securely in production but is kept simple in this example.

Rajanikant Hawaldar · Answer

Please check below article https://www.c-sharpcorner.com/UploadFile/4d9083/encrypt-in-javascript-and-decrypt-in-C-Sharp-with-aes-algorithm-i/

Jaimin Shethiya · Answer

Hello Piyush, You need to install the cryptojs in your typescript side and do the encryption when you required to encrypt your confidentials data. When the request is send to the server side then you need to decrypt that value in server side and use in the application side. For how to implement this mechanisum so you need to refer Amit or Tauhin Reply comments. Thanks