Explicitly register kernel netlink net implementation and avoid loading
the whole kernel-netlink plugin since the kernel netlink ipsec part is
unwanted.
Instead of storing the acquired context ids in a linked list, use an
array of booleans for the job. A boolean value of true in the array
designates an available context id.
The tkm_diffie_hellman_t plugin acquires a DH context from the Trusted
Key Manager and uses it to get a DH public value and the calculated
shared secret. Proper context handling is still missing though, the
plugin currently uses context ID 1.
The get_shared_secret function will be removed as soon as the TKM
specific keymat is ready.
Analogous to charon-nm the charon-tkm daemon is a specialized charon
instance used in combination with the trusted key manager (TKM) written
in Ada.
The charon-tkm is basically a copy of the charon-nm code which will
register it's own TKM specific plugins.
The daemon binary is built using the gprbuild utility. This is needed
because it uses the tkm-rpc Ada library and consequently the Ada
runtime. gprbuild takes care of the complete binding and linker steps
required to properly initialize the Ada runtime.
Adrian-Ken Rueegsegger