Переход от JCE к надувному замку (Blowfish) ⇐ JAVA

[Гость]

I need to convert a JCE based code to a Bouncy Castle based code. I'm completely new to Bouncy Castle and couldn't find a easy-to-understand introduction to this topic in general or my issue specifically. This is the JCE based class:

Код: Выделить всё

import java.security.NoSuchAlgorithmException; import java.security.Security; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; import com.sun.crypto.provider.SunJCE; public class JCEBlowfishEncrypterDecrypter {          private static final String ALGORITHM = "Blowfish";     public static SecretKeySpec key;     public static String crypt(String msg, String k) throws Exception {         SecretKeySpec key = init(k);         return Hex.byte2hex(intCrypt(msg, key));     }     public static String decrypt(String msg, String k) throws Exception {         SecretKeySpec key = init(k);         return new String(intDecrypt(Hex.hex2byte(msg), key));     }     private static byte[] intCrypt(String msg, SecretKeySpec key) throws Exception {         Cipher cipher = Cipher.getInstance(ALGORITHM);         cipher.init(1, key);         return cipher.doFinal(msg.getBytes());     }     private static byte[] intDecrypt(byte encrypted[], SecretKeySpec key) throws Exception {         Cipher cipher = Cipher.getInstance(ALGORITHM);         cipher.init(2, key);         return cipher.doFinal(encrypted);     }     private static SecretKeySpec init(String myKey) throws NoSuchAlgorithmException {         SunJCE sunJce = new SunJCE();         Security.addProvider(sunJce);         byte raw[] = myKey.getBytes();         return new SecretKeySpec(raw, ALGORITHM);     } } 

... And this is the Bouncy Castle based class:

Код: Выделить всё

import org.bouncycastle.crypto.BufferedBlockCipher; import org.bouncycastle.crypto.engines.BlowfishEngine; import org.bouncycastle.crypto.paddings.PKCS7Padding; import org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher; import org.bouncycastle.crypto.params.KeyParameter; public class BouncyCastleBlowfishEncrypterDecrypter {     public static String crypt(String msg, String key) throws Exception {         PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new BlowfishEngine(), new PKCS7Padding());         cipher.init(true, new KeyParameter(key.getBytes()));         byte[] inputAsBytes = msg.getBytes();         byte[] encryptedAsBytes = new byte[cipher.getOutputSize(inputAsBytes.length)];         int numberOfBytesCopiedOnEncryptedAsBytes = cipher.processBytes(inputAsBytes, 0, inputAsBytes.length,                 encryptedAsBytes, 0);         cipher.doFinal(encryptedAsBytes, numberOfBytesCopiedOnEncryptedAsBytes);         return Hex.byte2hex(encryptedAsBytes);     }     public static String decrypt(String msg, String key) throws Exception {         PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new BlowfishEngine(), new PKCS7Padding());         cipher.init(false, new KeyParameter(key.getBytes()));         byte[] outputConvertedAsBytes = Hex.hex2byte(msg);         byte[] decryptedAsBytes = new byte[cipher.getOutputSize(outputConvertedAsBytes.length)];         int numberOfBytesCopiedOnDecryptedAsBytes = cipher.processBytes(outputConvertedAsBytes, 0,                 outputConvertedAsBytes.length, decryptedAsBytes, 0);         cipher.doFinal(decryptedAsBytes, numberOfBytesCopiedOnDecryptedAsBytes);         return new String(decryptedAsBytes);     } } 

... And this is the main method:

Код: Выделить всё

     public static void main(String[] args) throws Exception {         String encrypted = JCEBlowfishEncrypterDecrypter.crypt("Test", "mmTSQOFzSL9xAwXGLMEe1Q==");         String decrypted = JCEBlowfishEncrypterDecrypter.decrypt(encrypted, "mmTSQOFzSL9xAwXGLMEe1Q==");         System.out.println("--------------");         System.out.println("encrypted   -> " + encrypted);         System.out.println("decrypted -> " + decrypted);                  encrypted = BouncyCastleBlowfishEncrypterDecrypter.crypt("Test",                 "mmTSQOFzSL9xAwXGLMEe1Q==");         decrypted = BouncyCastleBlowfishEncrypterDecrypter.decrypt(encrypted,                 "mmTSQOFzSL9xAwXGLMEe1Q==");         System.out.println("--------------");         System.out.println("encrypted   -> " + encrypted);         System.out.println("decrypted -> " + decrypted);     } 

... But I get some strange additional characters when decrypting: What's wrong?






Источник: https://stackoverflow.com/questions/781 ... e-blowfish