While they usually are not included in a normal strongSwan build, the XPC
header indirectly defines these Mach types. To build charon-xpc, which uses
both XPC and strongSwan includes, we have to redefine these types.
Since 42e0a317c6 ("ike: Only parse payloads valid for the current IKE
version") payload types are checked before creating objects. This check
failed for internally used payload types (e.g. proposal substructures),
which have a type >= 256, i.e. outside the IKE payload type range.
The transform identifier used in AH transforms is not the same as the
authentication algorithm identifier used in the transform attributes in
AH (and ESP) transforms.
iOS and Mac OS X clients establish individual IPsec SAs for the traffic
selectors received in Split-Include attributes (might have been different
in earlier releases). If we return 0.0.0.0/0 as TSr that either results
in a bunch of Quick Mode exchanges (for each TS), or with the latest
client releases an error notify (ATTRIBUTES_NOT_SUPPORTED).
We also can't install the IPsec SA with all configured subnets as that
would cause conflicts if the client later negotiates SAs for other subnets,
which iOS 8 does based on traffic to such subnets.
For Shrew and the Cisco client, which propose 0.0.0.0/0, we still need to
override the narrowed TS with 0.0.0.0/0, as they otherwise won't accept
the Quick Mode response. Likewise, we also have to narrow the TS before
installing the IPsec SAs and policies.
So we basically have to follow the client's proposal and only modify TSr
if we received 0.0.0.0/0. Since we don't get the original TS in the
narrow hook we handle the inbound QM messages and make note of IKE_SAs on
which we received a TSr of 0.0.0.0/0.
Fixes#737.
Similar to the inbound rules, the ALE filter processes IP-in-IP packets for
outbound tunnel mode traffic. When using an outbound default-drop policy,
Windows does not allow connection initiation without these explicit rules.
When processing inbound tunnel mode packets, Windows decrypts packets and
filters them as IP-in-IP packets. We therefore require an ALE filter that
calls the FWPM_CALLOUT_IPSEC_INBOUND_TUNNEL_ALE_ACCEPT callout to allow them
when using a default-drop policy.
Without these rules, any outbound packet created an ALE state that allows
inbound packets as well. Processing inbound packets without any outbound
traffic fails without these rules.
As the underlying C functions, send/recv on ruby sockets are not guaranteed
to send/recv all requested bytes. Use wrapper functions to make sure we get
all bytes needed.
If multiple sockets are ready, we previously preferred the IPv4 non-NAT socket
over others. To handle all with equal priority, use a round-robin selection.
We currently send the notify in Main Mode only, as it is explicitly not allowed
by RFC 2407 to send (unprotected) notifications in Aggressive Mode. To make
that work, we'd need to handle that notify in Aggressive Mode, which could
allow a MitM to inject such notifies and do some harm.
Signed-off-by: Thomas Egerer <[email protected]>
Otherwise fragmented CREATE_CHILD_SA exchanges won't get accepted
because they don't contain an SA payload.
It also prevents a warning when ordering payloads.
Fixes#752.
When invoking /bin/sh, its default PATH is used. On some systems, that does
not include the PATH where the ipsec script is installed, as charon is invoked
with a custom PATH. Explicitly setting the PATH of charon should fix this
case, properly invoking the (default) updown script.
Fixes#745.
We assume that a responder is behind a static NAT (e.g. port forwarding)
and allow remote address updates in such situations.
The problem described in RFC 5996 is only an issue if the NAT mapping
can expire.
As we want to avoid the libstrongswan include dependencies for libvici, avoid
the use of the bool type. Unfortunately this change may break the ABI for
vici_dump(). As this function is mostly for debugging purposes, we do it
nonetheless; my apologies if somebody already relies on the ABI stability of
that function.
Martin Willi