[dev-crypto-csharp] How to generate private key in java and load in C# with BouncyCastle.

[Lingfeng Zhuang]

I generate private key in java, but failed load in C# with BouncyCastle.

C#
            PemReader pemReader = new PemReader(new StringReader(

@"MIICdgIBADANBgkqhkiG9w0BAQEFAASCAmAwggJcAgEAAoGBAJx5AYmcTmkHIH3qUFmLw7pmPoTS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"));
            object obj = pemReader.ReadObject();

*obj is null.*

JAVA Source Code:

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;

public class RSAEncrypt {
public static void createKeyPairs() throws Exception {
// create the keys
KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
generator.initialize(1024, new SecureRandom());
KeyPair pair = generator.generateKeyPair();
PublicKey pubKey = pair.getPublic();
PrivateKey privKey = pair.getPrivate();
byte[] pk = pubKey.getEncoded();
byte[] privk = privKey.getEncoded();
String strpk = new String(getASE64FromBytes(pk));
String strprivk = new String(getASE64FromBytes(privk));

System.out.println("PublicKey Base64:\r\n" + strpk);
System.out.println();
System.out.println("PrivateKey Base64:\r\n" + strprivk);
}

public static void main(String[] args) throws Exception {
createKeyPairs();
}

public static String getASE64FromBytes(byte[] s) {
if (s == null)
return null;
return (new sun.misc.BASE64Encoder()).encode(s);
}
}

JAVA console output:

PublicKey Base64:
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCceQGJnE5pByB96lBZi8O6Zj6E0qQEv9UZ6GyD
Ep45OS93YM7weO0PtuF2dRuKPx/yvGaAgTq0OtXBVii84PI6++ep9eXPzvS/eWEpJToYxr395CMP
t3aYYX5Frlqx9YiMWeUPc8YbvB9M31kwe1z2FbsKD89RkQ6/QqPfrCYuBwIDAQAB

PrivateKey Base64: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Thanks!