private static PrincipalName ReadPrincipal(NdrBuffer buffer)
{
var type = (PrincipalNameType)buffer.ReadInt32BigEndian();
var count = buffer.ReadInt32BigEndian();
var realmData = ReadData(buffer);
string realm = string.Empty;
if (realmData.length > 0)
{
realm = Encoding.UTF8.GetString(realmData.value.ToArray());
}
var components = new List <string>();
for (var i = 0; i < count; i++)
{
var component = ReadData(buffer);
components.Add(Encoding.UTF8.GetString(component.value.ToArray()));
}
return(new PrincipalName(type, realm, components));
}
private void ReadCredentials(NdrBuffer buffer)
{
while (buffer.BytesAvailable > 0)
{
var cred = new Krb5Credential
{
Client = ReadPrincipal(buffer),
Server = ReadPrincipal(buffer),
KeyBlock = ReadKeyBlock(buffer),
AuthTime = ReadDateTimeOffset(buffer),
StartTime = ReadDateTimeOffset(buffer),
EndTime = ReadDateTimeOffset(buffer),
RenewTill = ReadDateTimeOffset(buffer),
IsKey = buffer.ReadByteLittleEndian() != 0,
Flags = (TicketFlags)buffer.ReadInt32BigEndian(),
Addresses = ReadAddresses(buffer),
AuthData = ReadAuthData(buffer),
Ticket = ReadData(buffer).value,
SecondTicket = ReadData(buffer).value
};
if ("X-CACHECONF:".Equals(cred.Server.Realm, StringComparison.OrdinalIgnoreCase))
{
this.ParseConfiguration(cred);
}
else
{
this.Credentials.Add(cred);
}
}
}
private static (int length, ReadOnlyMemory <byte> value) ReadData(NdrBuffer buffer)
{
/*
* data ::=
* length (32 bits)
* value (length bytes)
*/
var length = buffer.ReadInt32BigEndian();
var value = buffer.ReadMemory(length);
return(length, value);
}
private static IEnumerable <KrbHostAddress> ReadAddresses(NdrBuffer buffer)
{
var count = buffer.ReadInt32BigEndian();
var list = new List <KrbHostAddress>();
for (var i = 0; i < count; i++)
{
var addrType = (AddressType)buffer.ReadInt16BigEndian();
var data = ReadData(buffer);
list.Add(new KrbHostAddress {
AddressType = addrType, Address = data.value
});
}
return(list);
}
private static IEnumerable <KrbAuthorizationData> ReadAuthData(NdrBuffer buffer)
{
var count = buffer.ReadInt32BigEndian();
var list = new List <KrbAuthorizationData>();
for (var i = 0; i < count; i++)
{
var adType = (AuthorizationDataType)buffer.ReadInt16BigEndian();
var data = ReadData(buffer);
list.Add(new KrbAuthorizationData {
Type = adType, Data = data.value
});
}
return(list);
}
private static DateTimeOffset ReadDateTimeOffset(NdrBuffer buffer)
{
var time = buffer.ReadInt32BigEndian();
return(DateTimeOffset.FromUnixTimeSeconds(time));
}
