/// <summary>
/// Kerberos Client Initialize without server token
/// </summary>
private void ClientInitialize()
{
this.ApRequestAuthenticator = null;
// Create and send AS request for pre-authentication
KdcOptions options = KdcOptions.FORWARDABLE | KdcOptions.CANONICALIZE | KdcOptions.RENEWABLE;
KerberosTicket ticket = this.GetTGTCachedToken(this.credential, this.serverName);
if (ticket == null)
{
this.SendAsRequest(options, null);
// Expect recieve preauthentication required error
METHOD_DATA methodData;
this.ExpectPreauthRequiredError(out methodData);
// Create sequence of PA data
string timeStamp = KerberosUtility.CurrentKerberosTime.Value;
PaEncTimeStamp paEncTimeStamp = new PaEncTimeStamp(timeStamp,
0,
this.Context.SelectedEType,
this.Context.CName.Password,
this.Context.CName.Salt);
PaPacRequest paPacRequest = new PaPacRequest(true);
PaPacOptions paPacOptions = new PaPacOptions(PacOptions.Claims | PacOptions.ForwardToFullDc);
Asn1SequenceOf <PA_DATA> seqOfPaData_AS = new Asn1SequenceOf <PA_DATA>(new PA_DATA[] { paEncTimeStamp.Data, paPacRequest.Data, paPacOptions.Data });
// Create and send AS request for TGT
KerberosAsRequest asRequest = this.SendAsRequest(options, seqOfPaData_AS);
// Expect TGT(AS) Response from KDC
KerberosAsResponse asResponse = this.ExpectAsResponse();
// Create and send TGS request
Asn1SequenceOf <PA_DATA> seqOfPaData_TGS = new Asn1SequenceOf <PA_DATA>(new PA_DATA[] { paPacRequest.Data, paPacOptions.Data });
this.SendTgsRequest(this.serverName, options, seqOfPaData_TGS);
// Expect TGS Response from KDC
KerberosTgsResponse tgsResponse = this.ExpectTgsResponse();
this.UpdateTGTCachedToken(this.Context.Ticket);
}
else
{
// Restore SessionKey and Ticket from cache
this.Context.SessionKey = ticket.SessionKey;
this.Context.ApSessionKey = ticket.SessionKey;
this.Context.Ticket = ticket;
this.Context.SelectedEType = (EncryptionType)Context.Ticket.Ticket.enc_part.etype.Value;
}
// cache this.Context.Ticket;
ApOptions apOption;
GetFlagsByContextAttribute(out apOption);
AuthorizationData data = null;
EncryptionKey subkey = KerberosUtility.GenerateKey(this.client.Context.ContextKey);
this.token = this.CreateGssApiToken(apOption,
data,
subkey,
this.Context.ChecksumFlag,
KerberosConstValue.GSSToken.GSSAPI);
bool isMutualAuth = (contextAttribute & ClientSecurityContextAttribute.MutualAuth)
== ClientSecurityContextAttribute.MutualAuth;
bool isDceStyle = (contextAttribute & ClientSecurityContextAttribute.DceStyle)
== ClientSecurityContextAttribute.DceStyle;
if (isMutualAuth || isDceStyle)
{
this.needContinueProcessing = true;
}
else
{
this.needContinueProcessing = false;
}
}
