internal static bool TryParse(KERB_EXTERNAL_TICKET ticket, out KerberosExternalTicket result)
{
result = null;
try {
var ret = new KerberosExternalTicket();
ret.ServiceName = ParseName(ticket.ServiceName);
ret.TargetName = ParseName(ticket.TargetName);
ret.ClientName = ParseName(ticket.ClientName);
ret.DomainName = ticket.DomainName.ToString();
ret.TargetDomainName = ticket.TargetDomainName.ToString();
ret.AltTargetDomainName = ticket.AltTargetDomainName.ToString();
ret.SessionKey = ParseKey(ret.ServiceName, ret.DomainName, ticket.SessionKey);
ret.TicketFlags = (KerberosTicketFlags)ticket.TicketFlags.SwapEndian();
ret.Flags = ticket.Flags;
ret.KeyExpirationTime = ticket.KeyExpirationTime.ToDateTime();
ret.StartTime = ticket.StartTime.ToDateTime();
ret.EndTime = ticket.EndTime.ToDateTime();
ret.RenewUntil = ticket.RenewUntil.ToDateTime();
ret.TimeSkew = new TimeSpan(ticket.TimeSkew.QuadPart);
byte[] ticket_data = ticket.ReadTicket();
DERValue[] values = DERParser.ParseData(ticket_data, 0);
if (values.Length != 1)
{
return(false);
}
ret.Ticket = KerberosTicket.Parse(values[0], ticket_data);
result = ret;
return(true);
} catch (InvalidDataException) {
return(false);
}
}
private static NtResult <KerberosExternalTicket> QueryCachedTicket(SafeLsaLogonHandle handle, string target_name, KERB_RETRIEVE_TICKET_FLAGS flags,
Luid logon_id, SecHandle sec_handle, bool throw_on_error)
{
var package = handle.LookupAuthPackage(AuthenticationPackage.KERBEROS_NAME, throw_on_error);
if (!package.IsSuccess)
{
return(package.Cast <KerberosExternalTicket>());
}
using (var buffer = QueryCachedTicket(handle, package.Result, target_name, flags, logon_id, sec_handle, throw_on_error))
{
if (!buffer.IsSuccess)
{
return(buffer.Cast <KerberosExternalTicket>());
}
KERB_EXTERNAL_TICKET ticket = buffer.Result.Read <KERB_EXTERNAL_TICKET>(0);
if (!KerberosExternalTicket.TryParse(ticket, out KerberosExternalTicket ret))
{
return(NtStatus.STATUS_INVALID_PARAMETER.CreateResultFromError <KerberosExternalTicket>(throw_on_error));
}
return(ret.CreateResult());
}
}