MbauS9jF

1import java.util.Base64;
2import javax.crypto.Cipher;
3import javax.crypto.KeyGenerator;
4import javax.crypto.SecretKey;
5
6public class MyClass {
7	static Cipher cipher;
8
9	public static void main(String[] args) throws Exception {
10		KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
11		keyGenerator.init(128);
12		SecretKey secretKey = keyGenerator.generateKey();
13		cipher = Cipher.getInstance("AES");
14
15		String plainText = "AES CRIPTARE SI DECRIPTARE";
16		System.out.println("Textul inaintea criptarii: " + plainText);
17
18		String encryptedText = encrypt(plainText, secretKey);
19		System.out.println("Textul dupa criptare: " + encryptedText);
20
21		String decryptedText = decrypt(encryptedText, secretKey);
22		System.out.println("Textul dupa decriptare: " + decryptedText);
23	}
24
25	public static String encrypt(String plainText, SecretKey secretKey)
26			throws Exception {
27		byte[] plainTextByte = plainText.getBytes();
28		cipher.init(Cipher.ENCRYPT_MODE, secretKey);
29		byte[] encryptedByte = cipher.doFinal(plainTextByte);
30		Base64.Encoder encoder = Base64.getEncoder();
31		String encryptedText = encoder.encodeToString(encryptedByte);
32		return encryptedText;
33	}
34
35	public static String decrypt(String encryptedText, SecretKey secretKey)
36			throws Exception {
37		Base64.Decoder decoder = Base64.getDecoder();
38		byte[] encryptedTextByte = decoder.decode(encryptedText);
39		cipher.init(Cipher.DECRYPT_MODE, secretKey);
40		byte[] decryptedByte = cipher.doFinal(encryptedTextByte);
41		String decryptedText = new String(decryptedByte);
42		return decryptedText;
43	}
44}