RSA public key?

[ravingcoder]

Hi, trying to encrypt something using RSAServiceProvide. I have two problems. 1. Bad data when decrypting. (1) In prototype, RSA_Server instance in decrypting side and encrypting side is the same instance. Of course, this will change later. RSAServiceProvider RSA_Server; (2) On encrypting side: RSA_Server = new RSACryptoServiceProvider(); encryptedbuffer = RSA_Server.Encrypt( databuffer, false); NOTE: At first I was suspecting that databuffer is than 5 bytes. But I get same problem after I trimmed databuffer down to one bytes. Anyway, here's quote from MSDN: "The length of the rgb parameter is greater than the maximum allowed length. If the fOAEP parameter is false and the encryption is performed on a computer with the high encryption pack installed, the maximum length of the rgb parameter is 16 bytes. If the high encryption pack is not installed, the maximum length of the rgb parameter is 5 bytes." (3) On decrypting side: plaintext = RSA_Server.Decrypt(encryptedbuffer, false); 2. How can I retrieve private key from RSAParameters instance? I need to "publish" my public key - not the entire RSAParameters. Here's code from MSDN: //Good. PublicKey and "Exponent" are both byte array. byte[] PublicKey = {214,46,220,83,160,73,40,39,201,155,19,202,3,11,191,178,56, 74,90,36,248,103,18,144,170,163,145,87,54,61,34,220,222, 207,137,149,173,14,92,120,206,222,158,28,40,24,30,16,175, 108,128,35,230,118,40,121,113,125,216,130,11,24,90,48,194, 240,105,44,76,34,57,249,228,125,80,38,9,136,29,117,207,139, 168,181,85,137,126,10,126,242,120,247,121,8,100,12,201,171, 38,226,193,180,190,117,177,87,143,242,213,11,44,180,113,93, 106,99,179,68,175,211,164,116,64,148,226,254,172,147}; byte[] Exponent = {1,0,1}; //Create a new instance of RSACryptoServiceProvider. RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); //Create a new instance of RSAParameters. RSAParameters RSAKeyInfo = new RSAParameters(); //Set RSAKeyInfo to the public key values. RSAKeyInfo.Modulus = PublicKey; <--- OKAY, that's your public key. RSAKeyInfo.Exponent = Exponent; <--- what da? Is this your private key? //Import key parameters into RSA. RSA.ImportParameters(RSAKeyInfo); I need to pass encrypted data + RSA public key to decrypting side. Thanks.

[ravingcoder]

hope someone is reading the thread. QUESTION 3: Is RSAParameters serializable? can I send it via tcp channel as byte array? Thanks.