. NET docking Java uses modulus,exponent RSA encryption

There is a recent job that requires data to be sent to Java in RSA

Although some of the algorithms for the initial standard public key net and Java RSA population are different, the pit is almost finished.

For details, refer to

Http://www.cnblogs.com/dudu/p/csharp-openssl-encrypt-decrypt.html

But someone gave me a straight string of 10 digits.

And then I checked some. NET has a RSAParameters class, I try to turn modulus into Base64 and then generate RSAParameters objects and then

Use Rsacryptoserviceprovider.importparameters Although can be encrypted successfully but encrypted ciphertext reached more than 400 (normal can be parsed by the server ciphertext is 172 bits).

Then I want to write a RSA encryption class out of the Internet to find a bit of encryption formula

New BigInteger ("65537");      New Ten );        New BigInteger (Encoding.Default.GetBytes ("123456"));        var str = M.MODPOW (e, N). ToString ();

This time, the length of the encryption is 172, but the server or decryption failed.

When I tried a lot of different ways, I began to doubt my programmer's life, because in addition to my other departments docking, the Android department docking was successful.

Be forced to helpless I went to find the Java code to see if the encryption is successful

Finally, it was encrypted in Java. Java uses a class

Cipher Ciphe

Then through Baidu to search. NET there is no such class. No related documents found

Finally tried Google. Sure enough, I found it.

Original address
Http://stackoverflow.com/questions/22825663/cipher-selection-for-sslstream-in-net-4-5
I'll post my revised code below.

                byte[] Publickeybyte =Encoding.Default.GetBytes (modulus); byte[] Exponentbyte =Encoding.Default.GetBytes (Exponent); UTF8Encoding Byteconverter=Newutf8encoding (); stringPublickeystring =System.Text.Encoding.Default.GetString (Publickeybyte); stringExponentstring =System.Text.Encoding.Default.GetString (Exponentbyte); BigInteger Publickeybi=Biginteger.parse (publickeystring); BigInteger Exponentbi=Biginteger.parse (exponentstring); byte[] PublicKeyByte2 =Publickeybi.tobytearray (); byte[] ExponentByte2 =Exponentbi.tobytearray (); if(Publickeybyte2.length = =129) Array.resize (refPublicKeyByte2, -); RSACryptoServiceProvider RSA=NewRSACryptoServiceProvider (); RSAParameters Rsakeyinfo=NewRSAParameters (); Rsakeyinfo.modulus=Publickeybyte2.reverse ().                ToArray (); Rsakeyinfo.exponent=Exponentbyte2.reverse ().                ToArray (); Rsa.                ImportParameters (Rsakeyinfo); byte[] Passwordbyte =byteconverter.getbytes (encryptstring); varciphertext = convert.tobase64string (RSA. Encrypt (Passwordbyte,false));

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. NET docking Java uses modulus,exponent RSA encryption