Reduce the amount of time keying material (MSK, EMSK, temporary private
data) remains in memory in EAP methods. This provides additional
protection should there be any issues that could expose process memory
to external observers.
Signed-off-by: Jouni Malinen <j@w1.fi>
This makes it easier for static analyzers to figure out which code paths
are possible within eap_sim_msg_finish() for EAP-SIM. This will
hopefully avoid some false warnings (CID 68110, CID 68113, CID 68114).
Signed-off-by: Jouni Malinen <j@w1.fi>
If identity round limit is reached, EAP-SIM/AKA session is terminated.
This needs to free the allocated message.
Signed-hostap: Jouni Malinen <j@w1.fi>
RFC 4186, chapter 6.3.3 mandates that EAP-Failure is used only after
Client-Error and Notification messages. Convert the direct jumps to the
FAILURE state with a notification round before sending out EAP-Failure.
Signed-hostap: Jouni Malinen <j@w1.fi>
If the peer rejects re-authentication with AT_COUNTER_TOO_SMALL, fall
back to full authentication to allow the authentication session to be
completed.
Signed-hostap: Jouni Malinen <j@w1.fi>
Since the EAP-SIM/AKA identities are ASCII strings, there is no need to
use more complex way for storing and passing them. In addition, be more
strict about enforcing username (i.e., no realm part) to be used in the
EAP-SIM DB API. Similarly, require specific username type instead of any
of the types to be used as the key in the pseudonym and reauth
operations. This allows simpler lookup operations to be used.
Signed-hostap: Jouni Malinen <j@w1.fi>
Since we always request an identity in the request, the response
has to include AT_IDENTITY. This allows the SIM/Start response
processing to be simplified a bit.
Signed-hostap: Jouni Malinen <j@w1.fi>
There is no need to use eap_sim_db_identity_known() here since a new
SIM/Start message is built only if the identity in the previous response
was not recognized. The first round will always request AT_ANY_ID_REQ to
meet the RFC 4186 recommendation on EAP method specific identity request
being used.
Signed-hostap: Jouni Malinen <j@w1.fi>
If the peer uses an unknown reauth id, it would still be possible to use
pseudonym instead of permanent id. Allow this by changing the
AT_PERMANENT_ID_REQ to AT_FULLAUTH_ID_REQ in case unknown reauth id is
used in EAP-Response/Identity.
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
There was a technical change between the last IETF draft version
(draft-arkko-eap-aka-kdf-10) and RFC 5448 in the leading characters
used in the username (i.e., use unique characters for EAP-AKA' instead
of reusing the EAP-AKA ones). This commit updates EAP-AKA' server and
peer implementations to use the leading characters based on the final
RFC.
Note: This will make EAP-AKA' not interoperate between the earlier
draft version and the new version.
Signed-hostap: Jouni Malinen <j@w1.fi>
intended-for: hostap-1
AT_NEXT_PSEUDONYM is supposed to be included only in the Challenge
messages, not in the Re-authentication messages. This attribute was
incorrectly included in the Re-authentication messages and could have
been used to update the pseudonym state on the server without the peer
updating its state.
Signed-hostap: Jouni Malinen <j@w1.fi>
intended-for: hostap-1
This commit adds a new wrapper, random_get_bytes(), that is currently
defined to use os_get_random() as is. The places using
random_get_bytes() depend on the returned value being strong random
number, i.e., something that is infeasible for external device to
figure out. These values are used either directly as a key or as
nonces/challenges that are used as input for key derivation or
authentication.
The remaining direct uses of os_get_random() do not need as strong
random numbers to function correctly.
