問題描述

我正在嘗試使用 RSA 算法加密 .NET 中的字符串并在 Java 中解密結果.目前，我已經能夠做相反的事情(在 Java 中加密，在 .NET 中解密).在這里，我的代碼實際上可以工作(JAVA 加密):

和(.NET解密)

const int PROVIDER_RSA_FULL = 1;常量字符串 CONTAINER_NAME = "跟蹤器";CspParameters cspParams;cspParams = 新的 CspParameters(PROVIDER_RSA_FULL);cspParams.KeyContainerName = CONTAINER_NAME;RSACryptoServiceProvider rsa1 = 新的 RSACryptoServiceProvider(cspParams);rsa1.FromXmlString(< RSAKeyValue><模量> 2rRVVVFJRbH/wAPDtnwZwu + NXU + AZ6uXxh/SW + AMCBogg7vndZsnRiHoLttYYPqOyOhfgaBOQogrIfrKL4lipK4m52SBzw/FfcM9DsKs/rYR83tBLiIAfgdnVjF27tZID + HJMFTiI30mALjr7 + TFP + 2lIACXA1RIKTk7S9pDmX8 = LT;/模量><指數> AQAB</指數>< 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取代; g1WAWI4pEK9TA7CA2Yyy/2FzzNiu0uQCuE2TZYRNiomo96KQXpxwqAzZLw +VDXfJMypwDMAVZe/SqzSJnFEtZxjdxaEo3VLcZ1mnbIL0vS7D6iFeYutF9kF231165qGd3k2tgymNMMpY7oYKjS11Y6JqWDU0WE5hjS2X35iG6mE=</D></RSAKeyValue>");字符串 data2Decrypt = "BaB21vY+RD/jiY3AAsb269fIWTEH38s0xLUfJ7CoVUgaQ6vYzB0tiJ1Ag9HNEdCcuZdGchhqnms8jpsqsHC1iKrz6QCLsgUU7VNWDfQqZYR6Rl/GwR0biK2STnOL+g06f/JUdixHOHOgROVMqmqmqREMYK5Mpl8;byte[] encyrptedBytes = Convert.FromBase64String(data2Decrypt);byte[] plain = rsa1.Decrypt(encyrptedBytes, false);string decryptedString = System.Text.Encoding.UTF8.GetString(plain);Console.WriteLine("SALIDA:" + decryptedString);

現在我想做相反的事情......但是我遇到了一些錯誤，比如(密鑰的大小應該是 128 字節......等等)我應該怎么做?

這里我添加當前的不工作代碼:

.NET

public string Encrypt(string text){常量 int PROVIDER_RSA_FULL = 1;常量字符串 CONTAINER_NAME = "跟蹤器";CspParameters cspParams;cspParams = 新的 CspParameters(PROVIDER_RSA_FULL);cspParams.KeyContainerName = CONTAINER_NAME;RSACryptoServiceProvider rsa1 = 新的 RSACryptoServiceProvider(cspParams);rsa1.FromXmlString(< RSAKeyValue><模量> 2rRVVVFJRbH/wAPDtnwZwu + NXU + AZ6uXxh/SW + AMCBogg7vndZsnRiHoLttYYPqOyOhfgaBOQogrIfrKL4lipK4m52SBzw/FfcM9DsKs/rYR83tBLiIAfgdnVjF27tZID + HJMFTiI30mALjr7 + TFP + 2lIACXA1RIKTk7S9pDmX8 = LT;/模量><指數> AQAB</指數>< 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取代; MM/c18zroJ2Iqi9s5/asvUBF3pjO3NSEbFjFpP/NT6WdKimvECWPz2xT6NlV0Vc6tQaAAmtn7Bt + HPhfVdrA4/ysYVe3/6TWkPjW + bvAhMWu/ZqISx11/jPYSGD9g3ZXgUiqcQM8UbOjlswoq4fpheEXTB0xdVutDLpO3qgHN6k=</D></RSAKeyValue>");System.Text.UTF8Encoding 編碼 = new System.Text.UTF8Encoding();byte[] textBytes = encoding.GetBytes(text);byte[] encryptedOutput = rsa1.Encrypt(textBytes, false);字符串 outputB64 = Convert.ToBase64String(encryptedOutput);Console.WriteLine(outputB64);返回輸出B64；}

Java

public static String Decrypt(String encryptedString) throws IllegalBlockSizeException, UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, BadPaddingException{字節[] modulusBytes = Base64.decode( 2rRVVVFJRbH/wAPDtnwZwu + NXU + AZ6uXxh/SW + AMCBogg7vndZsnRiHoLttYYPqOyOhfgaBOQogrIfrKL4lipK4m52SBzw/FfcM9DsKs/rYR83tBLiIAfgdnVjF27tZID + HJMFTiI30mALjr7 + TFP + 2lIACXA1RIKTk7S9pDmX8 =");byte[] exponentBytes = Base64.decode("AQAB");BigInteger 模數 = 新 BigInteger(1，模數字節)；BigInteger 指數 = new BigInteger(1, exponentBytes);RSAPrivateKeySpec rsaPrivKey = new RSAPrivateKeySpec(模數，指數)；KeyFactory 事實 = KeyFactory.getInstance("RSA");PrivateKey privKey = fact.generatePrivate(rsaPrivKey);密碼密碼 = 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);返回 cipherData.toString();}

Java 解密代碼的最后幾行沒有意義.這些行是:

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

您必須顛倒在 .NET 中用于加密的步驟順序.首先，您應該對編碼字符串進行 Base64 解碼以獲取密碼字節.您這樣做了，但是您將結果錯誤地標記為 base64String.您可能應該將此結果稱為 cipherData.其次，您需要解密 cipherData 以獲得純文本.第三，您應該使用帶有第二個參數的 Charset 的雙參數 String 構造函數從純字節創建一個字符串.下面是代碼的樣子，或者接近它的樣子.

byte[] cipherData = Base64.decode(encodedString);byte[] plainBytes = cipher.doFinal(cipherData);返回新字符串(plainBytes，UTF-8")；

最后，在 Java 中，每個對象都有一個 toString() 方法，但它并不總是按照你的意愿去做.對于數組，toString() 方法只返回該數組的對象 id 的表示形式，類似于 JVM 中內存地址的等價物.

我錯過了您在解密代碼中也使用了錯誤的密鑰.您正在使用 RSA 公鑰，但您必須改用 RSA 私鑰.

I am trying to encrypt strings in .NET by using a RSA algorithm and decrypt the result in Java. At the moment, I have been able to do the opposite (Encrypt in Java, Decrypt in .NET). Here I have my code that actually works (JAVA encryption):

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;

And (.NET decryption)

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);

Now I want to do the opposite... But I get some errors like (the size of the key should be 128 bytes... etc) How should I do it?

Here I add the current non working code:

.NET

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

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();
}

The last few lines of your Java decrypt code do not make sense. These lines are:

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();

You have to reverse the order of the steps you used to encrypt in .NET. First, you should Base64 decode the encoded string to get the cipher bytes. You did that, but you mislabeled the result as base64String. You probably should call this result cipherData. Second, you need to decrypt cipherData to get plain text. Third, you should create a string from plainbytes using the two-arg String constructor with the Charset for the second argument. Here is what the code should look like, or close to it.

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

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

Finally, in Java every object has a toString() method but it doesn't always do what you want. For arrays the toString() method simply returns a representation of object id for that array, sort of the JVM equivalent of a memory address.

EDIT:

I missed that you are also using the wrong key in your decrypt code. Your are using the RSA public key, but you must instead use the RSA private key.

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