Get public key from certificate, and Convert the key to the RSAParameter

 byte[] pk = cer.GetPublicKey();
   byte[] m = new byte[pk.Length - 3];
   Buffer.BlockCopy(pk, 0, m, 0, m.Length);
   byte[] e = new byte[3];
   Buffer.BlockCopy(pk, m.Length, e, 0, 3);
   String key = "<RSAKeyValue><Modulus>" + Convert.ToBase64String(m)+"</Modulus><Exponent>"+Convert.ToBase64String(e)+"</Exponent></RSAKeyValue>";
   Console.WriteLine(key);
   RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
   rsa.FromXmlString(key);
   Console.WriteLine(rsa.ToXmlString(false));

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Posted Apr 08 2004, 12:28 PM by Montaque