Java RSA加密 – 解密.NET

我正在使用RSA加密JAVA并尝试使用.NET进行解密。 我包含了我的JAVA代码和.NET代码，希望有人有这方面的经验。

JAVA代码：

byte[] modulusBytes = Base64.decode("xTSiS4+I/x9awUXcF66Ffw7tracsQfGCn6g6k/hGkLquHYMFTCYk4mOB5NwLwqczwvl8HkQfDShGcvrm47XHKUzA8iadWdA5n4toBECzRxiCWCHm1KEg59LUD3fxTG5ogGiNxDj9wSguCIzFdUxBYq5ot2J4iLgGu0qShml5vwk="); 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"); cipher.init(Cipher.ENCRYPT_MODE, pubKey); byte[] plainBytes = new String("big kitty dancing").getBytes("UTF-8"); byte[] cipherData = cipher.doFinal( plainBytes ); String encryptedString = Base64.encodeBytes(cipherData); 

从这个JAVA代码我得到encryptedString的结果恰好是：

FoP4 + AAIH6hcabXnrvNG5YUk / nBv9n9HU0CAgZjkIWQIDjbOpSwoPVBFERrZ6641x2QaoJw5yv18XAay + 0WrCaSw4sveRX + hmPm5qeVUPcjoR4slsVZ / hBFJtAHj9tva4hOugWDZa9s3RVJlxkNfE + U +的Kt / YKLOi2EYbH05HjeM =

并尝试使用以下.NET代码进行解密

 const int PROVIDER_RSA_FULL = 1; const string CONTAINER_NAME = "Tracker"; CspParameters cspParams; cspParams = new CspParameters(PROVIDER_RSA_FULL); cspParams.KeyContainerName = CONTAINER_NAME; RSACryptoServiceProvider rsa1 = new RSACryptoServiceProvider(cspParams); rsa1.FromXmlString("xTSiS4+I/x9awUXcF66Ffw7tracsQfGCn6g6k/hGkLquHYMFTCYk4mOB5NwLwqczwvl8HkQfDShGcvrm47XHKUzA8iadWdA5n4toBECzRxiCWCHm1KEg59LUD3fxTG5ogGiNxDj9wSguCIzFdUxBYq5ot2J4iLgGu0qShml5vwk=AQAB
+lXMCEwIN/7+eMpBrq87kQppxu3jJBTwztGTfXNaPUTx+A6uqRwug5oHBbSpYXKNDNCBzVm/0VxB3bo4FJx+ZQ==
yasOGaJaE9xlF9T2xRuKeG9ZxCiyjhYaYB/mbtL+SIbtkRLi/AxaU4g2Il/UxhxhSXArKxIzV28zktispPJx1Q==ueRgQIEFUV+fY979a1RgrVHIPpqEI1URhOMH3Q59oiXCcOumM5njyIHmWQxRAzXnG+7xlKXi1PrnRll0L4oOKQ==dfEMNgG1HJhwpxdtmqkYuoakwQvsIRzcIAuIAJh1DoWaupWJGk8/JEstHb1d+t7uJrzrAi2KyT/HscH2diE0YQ==YoYF9PF6FiC0YngVeaC/eqt/ea8wMYNN3YO1LuzWpcy2exPRj2U0ZbWMvHXMUb4ea2qmhZGx1QlK4ULAuWKpXQ==g1WAWI4pEK9TA7CA2Yyy/2FzzNiu0uQCuE2TZYRNiomo96KQXpxwqAzZLw+VDXfJMypwDMAVZe/SqzSJnFEtZxjdxaEo3VLcZ1mnbIL0vS7D6iFeYutF9kF231165qGd3k2tgymNMMpY7oYKjS11Y6JqWDU0WE5hjS2X35iG6mE="); string data2Decrypt = "FoP4+AAIH6hcabXnrvNG5YUk/nBv9n9HU0CAgZjkIWQIDjbOpSwoPVBFERrZ6641x2QaoJw5yv18XAay+0WrCaSw4sveRX+hmPm5qeVUPcjoR4slsVZ/hBFJtAHj9tva4hOugWDZa9s3RVJlxkNfE+u+Kt/YKLOi2EYbH05HjeM="; byte[] encyrptedBytes = Convert.FromBase64String(data2Decrypt); byte[] plain = rsa1.Decrypt(encyrptedBytes, false); string decryptedString = System.Text.Encoding.UTF8.GetString(plain); 

Answer 1

在Java端，您需要使用"RSA/ECB/PKCS1Padding"作为算法名称。 使用简单的"RSA"名称，Java不会添加C＃实现所期望的PKCS＃1填充，因此是“错误数据”。

填充是将输入数据（您的编码字符串）转换为稍大的字符串，其长度与RSA模数相同（此处为128字节）。 它对于安全性和注入一些随机性很重要（相同的输入字符串不会每次产生相同的加密字符串;但解密过程会删除该随机性并恢复正确的字符串）。