AuthClientStart

Parameters:
- Nn, the nonce length.

State:
- state, a ClientAkeState structure.

Input:
- credential_request, a CredentialRequest structure.

Output:
- ke1, a KE1 structure.

def AuthClientStart(credential_request):
  client_nonce = random(Nn)
  client_keyshare_seed = random(Nseed)
  (client_secret, client_public_keyshare) =
    DeriveDiffieHellmanKeyPair(client_keyshare_seed)

  auth_request = AuthRequest {
    client_nonce,
    client_public_keyshare
  }

  ke1 = KE1 {
    credential_request,
    auth_request
  }

  state.client_secret = client_secret
  state.ke1 = ke1
  return ke1