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@codewithshehraz
Created November 12, 2020 19:11
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Encrypt in java and Decrypt in Node or vice versa
import React from "react";
import "./styles.css";
import CryptoJS from "crypto-js";
export default function App() {
const [encryptedBase64Key, setEncryptedBase64Key] = React.useState("");
const [encryptedCipherText, setEncryptedCipherText] = React.useState("");
const [decryptedCipherText, setDecryptedCipherText] = React.useState("");
const decrypt = () => {
//var encryptedBase64Key = "aXRzaG91bGRiZTE2Y2hhcg==";
var parsedBase64Key = CryptoJS.enc.Base64.parse(encryptedBase64Key);
//var encryptedCipherText = "wbsl6Tegfc7mexCHUYPS+dON3BWfgU+tD1nkiHiZ4LyrHlUXlWsfeInWMDaZO39z"; // or encryptedData;
var decryptedData = CryptoJS.AES.decrypt(
encryptedCipherText,
parsedBase64Key,
{
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
}
);
// console.log( “DecryptedData = “ + decryptedData );
// this is the decrypted data as a string
var decryptedText = decryptedData.toString(CryptoJS.enc.Utf8);
setDecryptedCipherText(decryptedText);
console.log("DecryptedText = " + decryptedText);
};
const input = {
color: "red",
minHeight: "300px",
width: "100%"
};
return (
<div className="App">
<h1>Decypher Text</h1>
<h2>
Please Enter Encrypted Base 64 Key and Cipher Text to Decrypt Text
</h2>
<input
className={input}
placeholder="Key"
onChange={(event) => {
setEncryptedBase64Key(event.target.value);
}}
value={encryptedBase64Key}
type="text"
/>
<br />
<input
className={input}
placeholder="Cypher Text"
onChange={(event) => {
setEncryptedCipherText(event.target.value);
}}
value={encryptedCipherText}
type="text"
/>
<br />
<input type="button" value="submit" onClick={decrypt} />
<br />
{decryptedCipherText === "" ? (
""
) : (
<span className="result">{decryptedCipherText}</span>
)}
</div>
);
}
import java.security.Key;
import java.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
public class Main {
private static final String ALGO = "AES"; // Default uses ECB PKCS5Padding
public static String encrypt(String Data, String secret) throws Exception {
Key key = generateKey(secret);
Cipher c = Cipher.getInstance(ALGO);
c.init(Cipher.ENCRYPT_MODE, key);
byte[] encVal = c.doFinal(Data.getBytes());
String encryptedValue = Base64.getEncoder().encodeToString(encVal);
return encryptedValue;
}
public static String decrypt(String strToDecrypt, String secret) {
try {
Key key = generateKey(secret);
Cipher cipher = Cipher.getInstance(ALGO);
cipher.init(Cipher.DECRYPT_MODE, key);
return new String(cipher.doFinal(Base64.getDecoder().decode(strToDecrypt)));
} catch (Exception e) {
System.out.println("Error while decrypting: " + e.toString());
}
return null;
}
private static Key generateKey(String secret) throws Exception {
byte[] decoded = Base64.getDecoder().decode(secret.getBytes());
Key key = new SecretKeySpec(decoded, ALGO);
return key;
}
public static String decodeKey(String str) {
byte[] decoded = Base64.getDecoder().decode(str.getBytes());
return new String(decoded);
}
public static String encodeKey(String str) {
byte[] encoded = Base64.getEncoder().encode(str.getBytes());
return new String(encoded);
}
public static void main(String a[]) throws Exception {
/*
* Secret Key must be in the form of 16 byte like,
*
* private static final byte[] secretKey = new byte[] { ‘m’, ‘u’, ‘s’, ‘t’, ‘b’,
* ‘e’, ‘1’, ‘6’, ‘b’, ‘y’, ‘t’,’e’, ‘s’, ‘k’, ‘e’, ‘y’};
*
* below is the direct 16byte string we can use
*/
String secretKey = "itshouldbe16char";
String encodedBase64Key = encodeKey(secretKey);
System.out.println("EncodedBase64Key = " + encodedBase64Key); // This need to be share between client and server
// To check actual key from encoded base 64 secretKey
// String toDecodeBase64Key = decodeKey(encodedBase64Key);
// System.out.println("toDecodeBase64Key = "+toDecodeBase64Key);
String toEncrypt = "MY DATA TO ENCRYPT 111-111-111 abc@dev.com";
System.out.println("Plain text = " + toEncrypt);
// AES Encryption based on above secretKey
String encrStr = Main.encrypt(toEncrypt, encodedBase64Key);
System.out.println("Cipher Text: Encryption of str = " + encrStr);
// AES Decryption based on above secretKey
String decrStr = Main.decrypt(encrStr, encodedBase64Key);
System.out.println("Decryption of str = " + decrStr);
}
}