It doesn't matter for crypto_derive_pairwise_ptk in non-SHA256 mode
but in the FT PTK derivation function, as well as in SHA256 mode all
bytes of the output do actually change with the PTK size.
Fix autoconnect trying to connect to networks never used before as found
by Tim Kourt. Update the comments to be consistent with the use of the
is_known field and the docs, in that a Known Network is any network that
has a config file in the iwd storage, and an autoconnect candidate is a
network that has been connected to before.
If the handshake fails, we trigger a deauthentication prior to reporting
NETDEV_RESULT_HANDSHAKE_FAILED. If a netdev_disconnect is invoked in
the meantime, then the caller will receive -ENOTCONN. This is
incorrect, since we are in fact logically connected until the connect_cb
is notified.
Tweak the behavior to keep the connected variable as true, but check
whether disconnect_cmd_id has been issued in the netdev_disconnect_event
callback.
If the device is currently connected, we will initiate a disconnection
(or wait for the disconnection to complete) prior to starting the
WSC-EAP association.
Use the org.freedesktop.DBus.Properties interfaces on objects with
properties and drop the old style GetProperty/SetProperty methods on
individual interfaces. Agent and KnownNetworks have no properties at
this time so don't add org.freedesktop.DBus.Properties interfaces.
We send the scan results where we obtained a PushButton target over to
device object. If EAP-WSC transaction is successful, then the scan
results are searched to find a network/bss combination found in the
credentials obtained. If found, the network is connected to
automatically.
This also fixes a potential buffer overflow since the ssid was cast to a
string inside network_create. However, ssid is a buffer of 32 bytes,
and would not be null-terminated in the case of a 32-byte SSID.
==5362== Conditional jump or move depends on uninitialised value(s)
==5362== at 0x419B62: wsc_wfa_ext_iter_next (wscutil.c:52)
==5362== by 0x41B869: wsc_parse_probe_response (wscutil.c:1016)
==5362== by 0x41FD77: scan_results (wsc.c:218)
==5362== by 0x415669: get_scan_done (scan.c:892)
==5362== by 0x432932: destroy_request (genl.c:134)
==5362== by 0x433245: process_unicast (genl.c:394)
==5362== by 0x43361A: received_data (genl.c:506)
==5362== by 0x42FDC2: io_callback (io.c:120)
==5362== by 0x42EABE: l_main_run (main.c:381)
==5362== by 0x402F90: main (main.c:234)
This is used to get arbitrary information out of the EAP method. Needed
for EAP-WSC to signal credential information obtained from the peer.
Other uses include signaling why EAP-WSC failed (e.g. invalid PIN, etc)
and processing of M2D discovery messages. The information in M2Ds might
be useful to external clients.
We used to open a socket for each wireless interface. This patch uses a
single socket with an attached BPF to handle all EAPoL traffic via a
single file descriptor.
When parsing the EAPoL-Key key data field we don't strip the 0xdd /
0x00 padding from the decrypted data so there may be trailing padding
after the IE sequence and valgrind will report an invalid read of the
length byte. Same thing may happen if we're sent garbage.
When we send M5 & M7, we need to generate a random IV. For testing
purposes, the IV can be provided in settings, otherwise it will be
generated randomly.
We need quite a bit of attributes of M2 for the duration of the WSC
handshake. Most importantly, we need to use the peer's public key when
processing M4 and M6. RegistrarNonce is also needed for generating any
ACK/NACK messages as needed.
Also, peer's device attributes such as Model, Manufacturer, etc might be
useful to report upon successful handshake.
AuthKey is already uploaded into auth_key_hmac. KeyWrapKey is now
uploaded into the AES-CBC(128) cipher. We currently have no use for
EMSK.
So we no longer need to keep the wsc_session_key structure around.
Encrypted Settings TLVs are structured similarly to the various WSC
messages. However, they lack a version2 extension field and use a Key
Wrap Authenticator element instead of Authenticator.
DevicePassword is the PIN, either static, dynamically generated or
entered by the user. For PushButton mode, DevicePassword is set to
'00000000'. It can also be provided via external means, such as NFC.
This patch allows DevicePassword to be externally configured into the
EAP-WSC layer. Optionally, the secret nonce values can also be
provided for testing purposes. If omitted, they will be generated using
l_getrandom.
We use the load_settings method to bootstrap the internal state of the
EAP WSC state machine. We require certain information to be provided by
the higher layers, namely:
Global Device parameters
- Manufacturer
- Model Name
- Model Number
- Serial Number
- Device Name
- Primary Device Type
- OS Version
Session specific parameters
- MAC Address
- Configuration Methods
- RF Bands
The following parameters are auto-generated for each new session, but
can be over-ridden if desired
- Private Key
- Enrollee Nonce
Expanded EAP methods should get their packets for handling starting at
the op-code field. They're not really interested in
type/vendor-id/vendor-type fields.
Andrew Zaborowski