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我會嘗試使用RC6算法,但我有一個錯誤:RC6密鑰生成器不可用
RC6的KeyGenerator不可
我怎樣才能獲得RC6的的KeyGenerator?
異常線程 「main」 java.security.NoSuchAlgorithmException:RC6的KeyGenerator在javax.crypto.KeyGenerator不可 (KeyGenerator.java:169) 在javax.crypto.KeyGenerator.getInstance(KeyGenerator.java:223 ) 在RC6.encrypt(RC6.java:27) 在RC6.main(RC6.java:16)
import javax.crypto.spec.*;
import java.security.*;
import javax.crypto.*;
public class Main
{
private static String algorithm = "RC6";
public static void main(String []args) throws Exception {
String toEncrypt = "The shorter you live, the longer you're dead!";
System.out.println("Encrypting...");
byte[] encrypted = encrypt(toEncrypt, "password");
System.out.println("Decrypting...");
String decrypted = decrypt(encrypted, "password");
System.out.println("Decrypted text: " + decrypted);
}
public static byte[] encrypt(String toEncrypt, String key) throws Exception {
// create a binary key from the argument key (seed)
SecureRandom sr = new SecureRandom(key.getBytes());
KeyGenerator kg = KeyGenerator.getInstance(algorithm);
kg.init(sr);
SecretKey sk = kg.generateKey();
// create an instance of cipher
Cipher cipher = Cipher.getInstance(algorithm);
// initialize the cipher with the key
cipher.init(Cipher.ENCRYPT_MODE, sk);
// enctypt!
byte[] encrypted = cipher.doFinal(toEncrypt.getBytes());
return encrypted;
}
public static String decrypt(byte[] toDecrypt, String key) throws Exception {
// create a binary key from the argument key (seed)
SecureRandom sr = new SecureRandom(key.getBytes());
KeyGenerator kg = KeyGenerator.getInstance(algorithm);
kg.init(sr);
SecretKey sk = kg.generateKey();
// do the decryption with that key
Cipher cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.DECRYPT_MODE, sk);
byte[] decrypted = cipher.doFinal(toDecrypt);
return new String(decrypted);
}
}
嗨馬丁,謝謝你的回答。是的,我已經安裝了無限加密技術。我已經下載並從這裏https://www.bouncycastle.org/latest_releases.html把Bouncy Castle的罐子,然後我把行Security.addProvider(新的BouncyCastleProvider())在主。但現在我有這個錯誤(在解密行):**墊塊損壞**爲什麼?有問題? – narraccino
我不知道什麼是錯的。這可能是使用錯誤的密鑰或密文的更改。在我的系統上,您的代碼正常工作。請注意,RC6是一個分組密碼。您需要確保您使用正確的操作模式*和IV,因爲Java和BC提供商傾向於支持ECB模式,這是不安全的。但是,在你開始工作後,這是一件值得擔心的事情。 –
我分心了,對不起,在解密中還有另一個keyGenerator。非常感謝你! – narraccino