RSA .NET加密Java解密

Question

我试图通过使用RSA算法加密.NET中的字符串并在Java中解密结果.目前,我已经能够做相反的事情(Java中的加密,.NET中的Decrypt).在这里,我有我的代码实际工作(JAVA加密):

byte[] modulusBytes = Base64.decode("2rRVVVFJRbH/wAPDtnwZwu+nxU+AZ6uXxh/sW+AMCBogg7vndZsnRiHoLttYYPqOyOhfgaBOQogrIfrKL4lipK4m52SBzw/FfcM9DsKs/rYR83tBLiIAfgdnVjF27tZID+HJMFTiI30mALjr7+tfp+2lIACXA1RIKTk7S9pDmX8=");
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("big kitty dancing").getBytes("UTF-8");
byte[] cipherData = cipher.doFinal( plainBytes );
String encryptedString = Base64.encode(cipherData);
return encryptedString;

和(.NET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("<RSAKeyValue><Modulus>2rRVVVFJRbH/wAPDtnwZwu+nxU+AZ6uXxh/sW+AMCBogg7vndZsnRiHoLttYYPqOyOhfgaBOQogrIfrKL4lipK4m52SBzw/FfcM9DsKs/rYR83tBLiIAfgdnVjF27tZID+HJMFTiI30mALjr7+tfp+2lIACXA1RIKTk7S9pDmX8=</Modulus><Exponent>AQAB</Exponent><P>+lXMCEwIN/7+eMpBrq87kQppxu3jJBTwztGTfXNaPUTx+A6uqRwug5oHBbSpYXKNDNCBzVm/0VxB3bo4FJx+ZQ==</P><Q>yasOGaJaE9xlF9T2xRuKeG9ZxCiyjhYaYB/mbtL+SIbtkRLi/AxaU4g2Il/UxhxhSXArKxIzV28zktispPJx1Q==</Q><DP>ueRgQIEFUV+fY979a1RgrVHIPpqEI1URhOMH3Q59oiXCcOumM5njyIHmWQxRAzXnG+7xlKXi1PrnRll0L4oOKQ==</DP><DQ>dfEMNgG1HJhwpxdtmqkYuoakwQvsIRzcIAuIAJh1DoWaupWJGk8/JEstHb1d+t7uJrzrAi2KyT/HscH2diE0YQ==</DQ><InverseQ>YoYF9PF6FiC0YngVeaC/eqt/ea8wMYNN3YO1LuzWpcy2exPRj2U0ZbWMvHXMUb4ea2qmhZGx1QlK4ULAuWKpXQ==</InverseQ><D>g1WAWI4pEK9TA7CA2Yyy/2FzzNiu0uQCuE2TZYRNiomo96KQXpxwqAzZLw+VDXfJMypwDMAVZe/SqzSJnFEtZxjdxaEo3VLcZ1mnbIL0vS7D6iFeYutF9kF231165qGd3k2tgymNMMpY7oYKjS11Y6JqWDU0WE5hjS2X35iG6mE=</D></RSAKeyValue>");

string data2Decrypt = "BaB21vY+RD/jiY3AAsb269fIWTEH38s0xLUfJ7CoVUgaQ6vYzB0tiJ1Ag9HNEdCcuZdGchhqnms8jpsqsHC1iKrz6QCLsgUU7VNWDfQqZYR6Rl/GwR0biK2STnOL+g06f/JUdixHOHOgROify1m8qppYo5plpOVMqYFzEMREMkM=";

byte[] encyrptedBytes = Convert.FromBase64String(data2Decrypt);

byte[] plain = rsa1.Decrypt(encyrptedBytes, false);
string decryptedString = System.Text.Encoding.UTF8.GetString(plain);
Console.WriteLine("SALIDA: " + decryptedString);

现在我想做相反的事情...但我得到一些错误(密钥的大小应该是128字节......等)我应该怎么做？

这里我添加了当前的非工作代码:

.净

public string Encrypt(string text)
{
    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("<RSAKeyValue><Modulus>2rRVVVFJRbH/wAPDtnwZwu+nxU+AZ6uXxh/sW+AMCBogg7vndZsnRiHoLttYYPqOyOhfgaBOQogrIfrKL4lipK4m52SBzw/FfcM9DsKs/rYR83tBLiIAfgdnVjF27tZID+HJMFTiI30mALjr7+tfp+2lIACXA1RIKTk7S9pDmX8=</Modulus><Exponent>AQAB</Exponent><P>92jJJyzFBSx6gL4Y1YpALmc5CNjoE/wETjqb3ci2v0+3rZWvJKmKy1ZEdlXpyuvXVksJ6cMdUpNAkMknUk9pTQ==</P><Q>4kxkABZOXyDLryYGCGY0b8N0FIdu5BTCFDYEdcatxl/f7ZGDS1NgHJpUWxkVXFfHy2Y/GuDOIbpcwlsO739H+w==</Q><DP>5bNFvrdUHF+VRN45VFjNCcgQLeSkY5mBrdfASoNFGA29LM5iE5nNIMfxPCS7sQiRnq6Af6YFHVtVgJchiMvtqQ==</DP><DQ>j+ng1qVY5epnXlWiFIla45C7K6sNfIMvAcdwgq39KWEjeWPGyYqWXtpOtzh2eylf6Bx4GVHKBW0NPJTIJMsfLQ==</DQ><InverseQ>8uu0dfPVDqB2qFM1Vdi8hl+2uZtN7gjT2co1cEWy29HVYBZD0k9KKCf2PbkeuSfpgFpE70wW5Hrp8V7l/SwSOw==</InverseQ><D>MM/c18zroJ2Iqi9s5/asvUBF3pjO3NSEbFjFpP/NT6WdKimvECWPz2xT6NlV0Vc6tQaAAmtn7Bt+HPhfVdrA4/ysYVe3/6TWkPjW+bvAhMWu/ZqISx11/jPYSGD9g3ZXgUiqcQM8UbOjlswoq4fpheEXTB0xdVutDLpO3qgHN6k=</D></RSAKeyValue>");

    System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
    byte[] textBytes = encoding.GetBytes(text);
    byte[] encryptedOutput = rsa1.Encrypt(textBytes, false);
    string outputB64 = Convert.ToBase64String(encryptedOutput);
    Console.WriteLine(outputB64);
    return outputB64;
}

Java的

public static String Decrypt(String encodedString) throws IllegalBlockSizeException, UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, BadPaddingException
{
    byte[] modulusBytes = Base64.decode("2rRVVVFJRbH/wAPDtnwZwu+nxU+AZ6uXxh/sW+AMCBogg7vndZsnRiHoLttYYPqOyOhfgaBOQogrIfrKL4lipK4m52SBzw/FfcM9DsKs/rYR83tBLiIAfgdnVjF27tZID+HJMFTiI30mALjr7+tfp+2lIACXA1RIKTk7S9pDmX8=");
    byte[] exponentBytes = Base64.decode("AQAB");
    BigInteger modulus = new BigInteger(1, modulusBytes );
    BigInteger exponent = new BigInteger(1, exponentBytes);

    RSAPrivateKeySpec rsaPrivKey = new RSAPrivateKeySpec(modulus, exponent);
    KeyFactory fact = KeyFactory.getInstance("RSA");
    PrivateKey privKey = fact.generatePrivate(rsaPrivKey);

    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    cipher.init(Cipher.DECRYPT_MODE, privKey);

    byte[] base64String = Base64.decode(encodedString);
    byte[] plainBytes = new String(base64String).getBytes("UTF-8");
    byte[] cipherData = cipher.doFinal(plainBytes);

    System.out.println(cipherData);
    return cipherData.toString();
}

Answer 1

Java解密代码的最后几行没有意义.这些行是:

byte[] base64String = Base64.decode(encodedString);
byte[] plainBytes = new String(base64String).getBytes("UTF-8");
byte[] cipherData = cipher.doFinal(plainBytes);

System.out.println(cipherData);
return cipherData.toString();

您必须颠倒用于在.NET中加密的步骤的顺序.首先,您应该对编码的字符串进行Base64解码以获取密码字节.你做到了,但是你把结果贴错了标签base64String.你可能应该调用这个结果cipherData.其次,您需要解密cipherData以获取纯文本.第三,你应该使用带有Charset的two-arg String构造函数为第二个参数从plainbytes创建一个字符串.这是代码应该是什么样的,或接近它.

byte[] cipherData = Base64.decode(encodedString);
byte[] plainBytes = cipher.doFinal(cipherData);

return new String(plainBytes, "UTF-8");

最后,在Java中,每个对象都有一个toString()方法,但它并不总能做到你想要的.对于数组,toString()方法只返回该数组的对象id的表示,类似于内存地址的JVM.

编辑:

我错过了你在解密代码中也使用了错误的密钥.您正在使用RSA公钥,但您必须使用RSA私钥.