I'm using Bouncy Castle (c#/vb.net version) and generating a 4096-byte RSA Keypair to use in my certificate with this routine:
Public Shared Function GenerateRSAKeypair(keylength As Integer) As AsymmetricCipherKeyPair
Dim r As New RsaKeyPairGenerator()
r.Init(New KeyGenerationParameters(New SecureRandom(), keylength))
Dim keys As AsymmetricCipherKeyPair = r.GenerateKeyPair()
Return keys
End Function
The procedure works ok, however it takes a very long time, up to one minute (I'm on a 2.4ghz pentium DualCore).
Since I don't have much experience (almost none really) with RSA and all these things, I just wanted to ask if it's normal that it takes so long to generate the key, or if I'm doing something wrong.
Thanks in advance!
After reading some theory about RSA, I can confirm there's nothing wrong with the code, it simply takes that long to generate such a big key.