Add WinSSP SSP for implicit authentication

doc/scapy/layers/gssapi.rst

@@ -21,6 +21,7 @@ The following SSPs are currently provided:
     - :class:`~scapy.layers.kerberos.KerberosSSP`
     - :class:`~scapy.layers.spnego.SPNEGOSSP`
     - :class:`~scapy.layers.msrpce.msnrpc.NetlogonSSP`
+    - :class:`~scapy.arch.windows.sspi.WinSSP` (Windows only)
 
 Basically those are classes that implement two functions, trying to micmic the RFCs:
 
@@ -134,4 +135,24 @@ Let's use :class:`~scapy.layers.ntlm.NTLMSSP` as an example of server-side SSP.
         }
     )
 
-You'll find other examples of how to instantiate a SSP in the docstrings of each SSP. See `the list <#ssplist>`_
+You'll find other examples of how to instantiate a SSP in the docstrings of each SSP. See `the list <#ssplist>`_
+
+WinSSP
+~~~~~~
+
+WinSSP is a special SSP that is only available on Windows, which calls the actual Windows SSPs local to the machine it's running on.
+It allows to use the implicit authentication of the logged-in user with Scapy and its various clients, and is also improves support of loopback connections.
+
+For instance using SPNEGO:
+
+.. code:: python
+
+    from scapy.arch.windows.sspi import *
+    clissp = WinSSP(Package="Negotiate")
+
+For instance using NTLM:
+
+.. code:: python
+
+    from scapy.arch.windows.sspi import *
+    clissp = WinSSP(Package="NTLM")

scapy/arch/__init__.py

@@ -143,6 +143,7 @@ def get_if_raw_addr6(iff):
 elif WINDOWS:
     from scapy.arch.windows import *  # noqa F403
     from scapy.arch.windows.native import *  # noqa F403
+    from scapy.arch.windows.sspi import *  # noqa F403
     SIOCGIFHWADDR = 0  # mypy compat
 else:
     log_loading.critical(