string SRPIdentifyToServer(KPRPCMessage srpem)
{
SRPParams srp = srpem.srp;
Error error;
KPRPCMessage data2client = new KPRPCMessage();
data2client.protocol = "setup";
data2client.srp = new SRPParams();
data2client.srp.stage = "identifyToClient";
data2client.version = ProtocolVersion;
// Generate a new random password
// SRP isn't very susceptible to brute force attacks but we get 32 bits worth of randomness just in case
byte[] password = Utils.GetRandomBytes(4);
string plainTextPassword = Utils.GetTypeablePassword(password);
// caclulate the hash of our randomly generated password
_srp.CalculatePasswordHash(plainTextPassword);
if (string.IsNullOrEmpty(srp.I))
{
data2client.error = new Error(ErrorCode.AUTH_MISSING_PARAM, new string[] { "I" });
}
else if (string.IsNullOrEmpty(srp.A))
{
data2client.error = new Error(ErrorCode.AUTH_MISSING_PARAM, new string[] { "A" });
}
else
{
// Init relevant SRP protocol variables
_srp.Setup();
// Begin the SRP handshake
error = _srp.Handshake(srp.I, srp.A);
if (error.code > 0)
{
data2client.error = error;
}
else
{
// store the username and client name for future reference
userName = _srp.I;
clientName = srpem.clientDisplayName;
data2client.srp.s = _srp.s;
data2client.srp.B = _srp.Bstr;
data2client.srp.securityLevel = securityLevel;
//pass the params through to the main kprpcext thread via begininvoke - that function will then create and show the form as a modal dialog
string secLevel = "low";
if (srp.securityLevel == 2)
{
secLevel = "medium";
}
else if (srp.securityLevel == 3)
{
secLevel = "high";
}
KPRPC.InvokeMainThread(new ShowAuthDialogDelegate(ShowAuthDialog), secLevel, srpem.clientDisplayName, srpem.clientDisplayDescription, plainTextPassword);
}
}
return(Jayrock.Json.Conversion.JsonConvert.ExportToString(data2client));
}