FreeRADIUS releases before 1.1.4 did not send MS-CHAP2-Success in
EAP-TTLS/MSCHAPv2. A wpa_supplicant workaround for that was added in
2005 and it has been enabled by default to avoid interoperability
issues. This could be disabled with all other EAP workarounds
(eap_workaround=0). However, that will disable some workarounds that are
still needed with number of authentication servers.
Old FreeRADIUS versions should not be in use anymore, so it makes sense
to remove this EAP-TTLS/MSCHAPv2 workaround completely to get more
complete validation of server behavior. This allows MSCHAPv2 to verify
that the server knows the password instead of relying only on the TLS
certificate validation.
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
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 adds a new getSessionId() callback for EAP peer methods to allow
EAP Session-Id to be derived. This commits implements this for EAP-FAST,
EAP-GPSK, EAP-IKEv2, EAP-PEAP, EAP-TLS, and EAP-TTLS.
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
Some deployed authentication servers seem to be unable to handle the TLS
Session Ticket extension (they are supposed to ignore unrecognized TLS
extensions, but end up rejecting the ClientHello instead). As a
workaround, disable use of TLS Sesson Ticket extension for EAP-TLS,
EAP-PEAP, and EAP-TTLS (EAP-FAST uses session ticket, so any server that
supports EAP-FAST does not need this workaround).
Signed-hostap: Jouni Malinen <j@w1.fi>
Previously, CONFIG_EAP_MSCHAPV2=y was assumed to be set for
CONFIG_EAP_TTLS=y. Avoid this dependency by making including the
MSCHAPv2 parts in EAP-TTLS conditionally.
Signed-hostap: Jouni Malinen <j@w1.fi>
Commit 30680e9332 changed the length
of the implicit challenge result to match with the exact length used
in TTLS. However, it failed to update the peer_challenge generation
to use a separate random value. Previously, this was generated as
part of the implicit challenge, but more correct way would have been
to generate a random value for it separately. Do this now to fix the
read after the allocated buffer (16 bytes after the implicit
challenge).
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
intended-for: hostap-1
Special processing is needed to handle EAP user request for
identity or password at the beginning of Phase 2 when the implicit
identity request is used. data->pending_phase2_req needs to be set
to an empty buffer in that case to avoid re-processing the previous
part of TLS negotiation when the user enters the needed information.
Signed-hostap: Jouni Malinen <j@w1.fi>
These protocols seem to be abandoned: latest IETF drafts have expired
years ago and it does not seem likely that EAP-TTLSv1 would be
deployed. The implementation in hostapd/wpa_supplicant was not complete
and not fully tested. In addition, the TLS/IA functionality was only
available when GnuTLS was used. Since GnuTLS removed this functionality
in 3.0.0, there is no available TLS/IA implementation in the latest
version of any supported TLS library.
Remove the EAP-TTLSv1 and TLS/IA implementation to clean up unwanted
complexity from hostapd and wpa_supplicant. In addition, this removes
any potential use of the GnuTLS extra library.
The size_t value here can be 64-bit and result in implicit sign
extension. In this particular case, that gets masked out by
host_to_be32(), so there is no practical difference, but it is better
to get rid of the 64-bit variable explicitly.
The password in User-Password AVP is padded to a multiple of 16 bytes
on EAP-TTLS/PAP. But when the password length is zero, no padding is
added. It doesn't cause connectivity issue. In fact, I could connect
with hostapd RADIUS server with zero length password.
I think it's better for obfuscation to pad the 16 bytes data when the
password length is zero with this patch.
In addition, start ordering header file includes to be in more
consistent order: system header files, src/utils, src/*, same
directory as the *.c file.
Changed peer to derive the full key (both MS-MPPE-Recv-Key and
MS-MPPE-Send-Key for total of 32 octets) to match with server
implementation.
Swapped the order of MPPE keys in MSK derivation since server
MS-MPPE-Recv-Key | MS-MPPE-Send-Key matches with the order specified for
EAP-TLS MSK derivation. This means that PEAPv0 cryptobinding is now
using EAP-MSCHAPv2 MSK as-is for ISK while EAP-FAST will need to swap
the order of the MPPE keys to get ISK in a way that interoperates with
Cisco EAP-FAST implementation.
The previous version was deriving unnecessarily large amount of output data
for the implicit challenge. With the TLS PRF, this was not causing any
problems because the output length is not explicitly bound into the
derivation. Anyway, it is better to use the correct output length should
the PRF be ever changed to a one that uses the output length to change the
beginning of the output data.
Need to process EAP AVP after the non-EAP Phase 2 method. In addition,
EAP-TTLS/MSCHAPv2 needs special code for handling the starting of TNC after
extra roundtrip of MSCHAPv2 success message.
