Java RSA加密

Question

我已經在C＃程序中使用了RSA密鑰加密算法（我在下面提到了），並且必須通過Java程序對數據進行加密。 我希望我的Java程序生成與C＃程序相同的加密密鑰。

公鑰：

<RSAKeyValue>
<Modulus>zgfXY1oUe4nyndX4qtobP1BMxtJ1/rfKU5csdAcWrSVu6ZaEAX3rL3cWnaSLzX4E1BNjSP9pjge6TH7UoaWqOQ==</Modulus>
<Exponent>AQAB</Exponent>
</RSAKeyValue>

C＃加密程序：

RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();

 rsa.FromXmlString(PublicKey); // read public key XML defined above

byte[] buffer = rsa.Encrypt(Encoding.UTF8.GetBytes(strToEncrypt), false);

string encryptedStr = HttpUtility.UrlEncode(buffer);// byteConverterGetString;

Java加密程序：

byte[] modulusBytes = Base64.decode("zgfXY1oUe4nyndX4qtobP1BMxtJ1/rfKU5csdAcWrSVu6ZaEAX3rL3cWnaSLzX4E1BNjSP9pjge6TH7UoaWqOQ==");
byte[] exponentBytes = Base64.decode("AQAB");

BigInteger modulus = new BigInteger(1, modulusBytes );               
BigInteger exponent = new BigInteger(1, exponentBytes);

RSAPublicKeySpec rsaPubKey = new RSAPublicKeySpec(modulus, exponent);

KeyFactory fact = KeyFactory.getInstance("RSA");

PublicKey pubKey = fact.generatePublic(rsaPubKey);

Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");

cipher.init(Cipher.ENCRYPT_MODE, pubKey);

byte[] plainBytes = new String("Admin123").getBytes("UTF-8");

byte[] cipherData = cipher.doFinal( plainBytes );

String encryptedString = Base64.encodeBytes(cipherData);

System.out.println(URLEncoder.encode(encryptedString));

我嘗試了上面的Java程序，但它給了我這樣的結果：

0％2Bgw7％2BXhYxA9ltDV5zERsF4DyXgMTc％2Fgx82wRtT1xfR3suY0XBJLadp7bXjmSX7CplDVdoQyH05Jpqgkd％2B1G4A％3D％3D

和C＃程序生成像

％23E％03％C2％10）％40E％BF％7B％F9％11％87c0％12Q％b9w％BA％2C％98％B4％B1％96％BC％ee的％c5_％c9t％1E'％E71 ％85％b68t％00％3A％B7％D9％FB％A1％18％BA％10％B4％C3C％E1' *％3B％F6D％E2％CC6％82％80％F2％A6

所以任何人都可以幫助我更正我的Java程序..謝謝

Answer 1

在我看來，您正在對兩種不同的內容進行URL編碼：

• 在Java中，您正在編碼Base64編碼的字符串，而
• 在C＃中，您正在字節數組上進行操作

這兩種不同方法的結果將不同。 也許您應該在Java部分中對new String( cipherData )進行編碼-或者只是在編碼之前比較兩個byte[]數組？

干杯，

Answer 2

您正在URLencoding不同的對象，只需嘗試以下代碼：

byte[] modulusBytes = Base64.decode("zgfXY1oUe4nyndX4qtobP1BMxtJ1/rfKU5csdAcWrSVu6ZaEAX3rL3cWnaSLzX4E1BNjSP9pjge6TH7UoaWqOQ==");
byte[] exponentBytes = Base64.decode("AQAB");

BigInteger modulus = new BigInteger(1, modulusBytes );               
BigInteger exponent = new BigInteger(1, exponentBytes);

RSAPublicKeySpec rsaPubKey = new RSAPublicKeySpec(modulus, exponent);

KeyFactory fact = KeyFactory.getInstance("RSA");

PublicKey pubKey = fact.generatePublic(rsaPubKey);

Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");

cipher.init(Cipher.ENCRYPT_MODE, pubKey);

byte[] plainBytes = new String("Admin123").getBytes("UTF-8");

byte[] cipherData = cipher.doFinal( plainBytes );

String string = new String(cipherData);

System.out.println(URLEncoder.encode(string,"UTF-8"));