我想制作一个程序,使用AES加密数据,然后使用RSA加密AES密钥,然后解密。但是,一旦我对AES密钥进行加密,就会出现128字节。 RSA只允许我解密117个字节或更少,所以当我去解密AES密钥时,它会引发错误。加密的AES密钥太大,无法用RSA解密(Java)
Relavent代码:
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
kpg.initialize(1024);
KeyPair kpa = kpg.genKeyPair();
pubKey = kpa.getPublic();
privKey = kpa.getPrivate();
updateText("Private Key: " +privKey +"\n\nPublic Key: " +pubKey);
updateText("Encrypting " +infile);
//Genereate aes key
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128); // 192/256
SecretKey aeskey = kgen.generateKey();
byte[] raw = aeskey.getEncoded();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
updateText("Encrypting data with AES");
//encrypt data with AES key
Cipher aesCipher = Cipher.getInstance("AES");
aesCipher.init(Cipher.ENCRYPT_MODE, skeySpec);
SealedObject aesEncryptedData = new SealedObject(infile, aesCipher);
updateText("Encrypting AES key with RSA");
//encrypt AES key with RSA
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, pubKey);
byte[] encryptedAesKey = cipher.doFinal(raw);
updateText("Decrypting AES key with RSA. Encrypted AES key length: " +encryptedAesKey.length);
//decrypt AES key with RSA
Cipher decipher = Cipher.getInstance("RSA");
decipher.init(Cipher.DECRYPT_MODE, privKey);
byte[] decryptedRaw = decipher.doFinal(encryptedAesKey); //error thrown here because encryptedAesKey is 128 bytes
SecretKeySpec decryptedSecKey = new SecretKeySpec(decryptedRaw, "AES");
updateText("Decrypting data with AES");
//decrypt data with AES key
Cipher decipherAES = Cipher.getInstance("AES");
decipherAES.init(Cipher.DECRYPT_MODE, decryptedSecKey);
String decryptedText = (String) aesEncryptedData.getObject(decipherAES);
updateText("Decrypted Text: " +decryptedText);
如何解决这个问题的任何想法?
您对错误的描述没有意义。您应该发布完整的堆栈跟踪。就目前而言,代码中的RSA部分应该可以正常工作。我测试了它,它对我来说工作得很好。 – 2010-05-03 23:55:10
啊,现在我明白了,你是一个懒惰的混蛋。我看到你在一个月前在太阳论坛*上发布了相同的代码,并且*你被告知你的bug是什么。然后,您只需转发相同的代码就可以浪费所有人的时间。如果我跑这个网站,我会删除您的帐户。 – 2010-05-04 01:19:25