Commit graph

134 commits

Author SHA1 Message Date
Jouni Malinen
0f3d578efc Remove the GPL notification from files contributed by Jouni Malinen
Remove the GPL notification text from the files that were
initially contributed by myself.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-02-11 19:39:36 +02:00
Jouni Malinen
cd52acec85 Rename tls_prf() to tls_prf_sha1_md5()
Prepare for multiple TLS PRF functions by renaming the SHA1+MD5 based
TLS PRF function to more specific name and add tls_prf() within the
internal TLS implementation as a wrapper for this for now.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-27 21:27:01 +02:00
Jouni Malinen
8307489840 Add implementation of TLS v1.2 PRF (P_SHA256)
Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-27 21:10:06 +02:00
Jouni Malinen
dcff088df7 Add SHA256-hash functions to generic crypto_hash_* functions
Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-27 21:10:06 +02:00
Maciej Szmigiero
6589774746 OpenSSL: Read certificate chain from server_cert file
Currently OpenSSL implementation of TLS in hostapd loads only top
certificate in server certificate file. Change this to try to the
whole chain first and only if that fails, revert to old behavior.

Signed-off-by: Maciej Szmigiero <mhej@o2.pl>
2011-11-19 12:06:59 +02:00
Jouni Malinen
e159cc5e9b Use NULL instead of 0 for pointers
Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-18 22:07:30 +02:00
Jouni Malinen
19df9b0761 Mark local functions static
These functions are not used outside the file in which they are defined.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-18 21:53:36 +02:00
Jouni Malinen
8f2e2e369b Make crypto_hash_init() easier for static analyzers
Avoid zero-length memset at the end of the buffer. This is not really
needed, but it makes the code a bit easier for static analyzers.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-13 23:24:08 +02:00
Jouni Malinen
911e10eac6 Make crypto_hash_init() easier for static analyzers
Avoid zero-length memset at the end of the buffer. This is not really
needed, but it makes the code a bit easier for static analyzers.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-13 23:19:19 +02:00
Jouni Malinen
a9ea17491a Make fips186_2_prf() easier for static analyzers
Explicitly validate seed_len to skip memset call with zero length
of copied data at the end of the buffer. This is not really needed,
but it makes the code a bit easier for static analyzers.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-13 22:59:33 +02:00
Jouni Malinen
a17539ebcd Remove unnecessary include file inclusion
Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-13 22:13:04 +02:00
Jouni Malinen
6ec64015f5 Use shared SHA-256 define for the block size
Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-13 21:43:31 +02:00
Jouni Malinen
7f6400ed19 Make sha256_process() easier for static analyzers
md->curlen cannot indicate full buffer size here since the buffered
data is processed whenever the full block size of data is available.
Avoid invalid warnings from static analyzers on memcpy() outside the
buffer length by verifying that curlen is smaller than block size.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-13 21:36:23 +02:00
Jouni Malinen
dbdcfa3979 TLS: Add preliminary support for partial message processing
Reassemble partial TLS records to make the internal TLS client
implementation more convenient for stream sockets.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-13 10:47:04 +02:00
Jouni Malinen
edc95487aa Add random.c into libcrypto.a
Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-05 13:02:31 +02:00
Pavel Roskin
9339bd5cd2 random: Improve error messages about writing to entropy file 2011-10-30 21:50:22 +02:00
Evan Broder
c48183fca2 For MS-CHAP, convert the password from UTF-8 to UCS-2
The MS-CHAPv1 and MS-CHAPv2 RFCs specify that the password is a string
of "Unicode characters", which for Windows means UCS-2; thus the
password could be any even-length string of up to 512 bytes.

Instead of making the incompatible change of requiring the incoming
password to be UCS-2 encoded, assume the password is UTF-8 encoded and
convert it before using it in NtPasswordHash and
EncryptPwBlockWithPasswordHash.

Signed-off-by: Evan Broder <ebroder@mokafive.com>
2011-10-29 00:23:54 +03:00
Jouni Malinen
fd2f2d0489 Remove EAP-TTLSv1 and TLS/IA
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.
2011-09-25 21:28:32 +03:00
Jouni Malinen
e655e1f512 GnuTLS: Fix build bit various GnuTLS versions
This fixes some build issues in GnuTLS wrapper to be compatible with
at least following GnuTLS versions: 2.2.5, 2.4.3, 2.6.6, 2.8.6,
2.10.5, 2.12.11, 3.0.3.
2011-09-25 19:32:28 +03:00
Pavel Roskin
ffbf1eaa26 Fix typos found by codespell
Signed-off-by: Pavel Roskin <proski@gnu.org>
2011-09-22 00:43:59 +03:00
Jouni Malinen
1b414f59fc eapol_test: Add option for writing server certificate chain to a file
eapol_test command line argument -o<file> can now be used to request
the received server certificate chain to be written to the specified
file. The certificates will be written in PEM format. [Bug 391]
2011-09-17 22:42:54 +03:00
Jouni Malinen
2e92310217 random: Check fwrite return value to avoid warnings
Some compilers complain about fwrite calls if the return value is
not checked, so check the value even if it does not really make
much of a difference in this particular case.
2011-08-06 21:16:31 +03:00
Jouni Malinen
15f0961447 Check random_get_bytes() result before writing entropy file 2011-07-15 17:17:48 +03:00
Jouni Malinen
40eebf2353 MD5: Fix clearing of temporary stack memory to use correct length
sizeof of the structure instead of the pointer was supposed to be used
here. Fix this to clear the full structure at the end of MD5Final().
2011-07-15 13:42:06 +03:00
Jouni Malinen
235279e777 TLS: Add support for tls_disable_time_checks=1 in client mode
This phase1 parameter for TLS-based EAP methods was already supported
with GnuTLS and this commit extends that support for OpenSSL and the
internal TLS implementation.
2011-07-05 11:29:42 +03:00
Jouni Malinen
38e24575c1 random: Add support for maintaining internal entropy store over restarts
This can be used to avoid rejection of first two 4-way handshakes every
time hostapd (or wpa_supplicant in AP/IBSS mode) is restarted. A new
command line parameter, -e, can now be used to specify an entropy file
that will be used to maintain the needed state.
2011-05-31 20:07:11 +03:00
Jouni Malinen
0bdaa741cd OpenSSL: Use consistent SSL_get_app_data validation in tls_verify_cb
The returned value cannot really be NULL, but better keep this
function consistent on whether the returned value is checked or not.
2011-04-14 02:50:52 +03:00
Adam Kent
4bb3377bc5 Fix #ifdef check for older openssl versions
Small compile fix for older versions of openssl that do not have SHA256
support and hence do not define OPENSSL_NO_SHA256.
2011-04-11 18:37:12 +03:00
Jouni Malinen
d47fa330b8 random: Read /dev/random in the background with eloop read socket
This makes it more likely to be able to fetch the 20 octet seed from
/dev/random in cases where other programs may also be competing for
this.
2011-03-22 23:15:00 +02:00
Dmitry Shmidt
2a0cd0670b OpenSSL: Add access to Android certificates
This allows keystore:// prefix to be used with client_cert and
private_key configuration parameters.

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
2011-02-26 12:08:20 +02:00
Jouni Malinen
effab86ff2 Remove unneeded OpenSSL error messages from key/cert parsing
If parsing of the certificate or private key succeeds using any of
the tried encoding types, clear the OpenSSL error queue without
showing the pending errors in debug log since they do not really
provide any useful output and can be confusing.
2011-02-22 22:19:55 +02:00
Jouni Malinen
b993e77b5b Removed unused variable from non-Linux builds 2010-12-14 17:10:39 +02:00
Jouni Malinen
805253d820 random: Fix a compiler warning about unused variable
In CONFIG_NO_STDOUT_DEBUG=y case, the error variable was not used.
2010-11-25 23:32:17 +02:00
Jouni Malinen
08704cd885 hostapd: Verify availability of random data when using WPA/WPA2
On Linux, verify that the kernel entropy pool is capable of providing
strong random data before allowing WPA/WPA2 connection to be
established. If 20 bytes of data cannot be read from /dev/random,
force first two 4-way handshakes to fail while collecting entropy
into the internal pool in hostapd. After that, give up on /dev/random
and allow the AP to function based on the combination of /dev/urandom
and whatever data has been collected into the internal entropy pool.
2010-11-24 13:08:03 +02:00
Jouni Malinen
bbb921daaa Maintain internal entropy pool for augmenting random number generation
By default, make hostapd and wpa_supplicant maintain an internal
entropy pool that is fed with following information:

hostapd:
- Probe Request frames (timing, RSSI)
- Association events (timing)
- SNonce from Supplicants

wpa_supplicant:
- Scan results (timing, signal/noise)
- Association events (timing)

The internal pool is used to augment the random numbers generated
with the OS mechanism (os_get_random()). While the internal
implementation is not expected to be very strong due to limited
amount of generic (non-platform specific) information to feed the
pool, this may strengthen key derivation on some devices that are
not configured to provide strong random numbers through
os_get_random() (e.g., /dev/urandom on Linux/BSD).

This new mechanism is not supposed to replace proper OS provided
random number generation mechanism. The OS mechanism needs to be
initialized properly (e.g., hw random number generator,
maintaining entropy pool over reboots, etc.) for any of the
security assumptions to hold.

If the os_get_random() is known to provide strong ramdom data (e.g., on
Linux/BSD, the board in question is known to have reliable source of
random data from /dev/urandom), the internal hostapd random pool can be
disabled. This will save some in binary size and CPU use. However, this
should only be considered for builds that are known to be used on
devices that meet the requirements described above. The internal pool
is disabled by adding CONFIG_NO_RANDOM_POOL=y to the .config file.
2010-11-24 01:29:40 +02:00
Jouni Malinen
3642c4313a Annotate places depending on strong random numbers
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.
2010-11-24 01:05:20 +02:00
Jouni Malinen
cc91e07e57 OpenSSL: Fix public key length in DH group 5 operations
The length of the prime was used incorrectly and this resulted
in WPS DH operation failing whenever the public key ended up having
leading zeros (i.e., about every 1/256th time).
2010-06-26 21:03:25 -07:00
Jouni Malinen
7992b07f6a Remove unnecessary SUBDIRS loops from src/*/Makefile
There are no subdirectories in any of these directories or plans
for adding ones. As such, there is no point in running the loop
that does not do anything and can cause problems with some shells.
2010-04-17 17:10:31 +03:00
Jouni Malinen
0cb445a472 Fix internal DH implementation not to pad shared key
The returned buffer length was hardcoded to be the prime length
which resulted in shorter results being padded in the end. However,
the results from DH code are supposed to be unpadded (and when used
with WPS, the padding is done in WPS code and it is added to the
beginning of the buffer). This fixes WPS key derivation errors
in about 1/256 of runs ("WPS: Incorrect Authenticator") when using
the internal crypto code.
2010-04-12 12:25:21 +03:00
Jouni Malinen
8d6399e455 Use unsigned bitfield for 1-bit values 2010-04-11 12:27:13 +03:00
Jouni Malinen
00468b4650 Add TLS client events, server probing, and srv cert matching
This allows external programs (e.g., UI) to get more information
about server certificate chain used during TLS handshake. This can
be used both to automatically probe the authentication server to
figure out most likely network configuration and to get information
about reasons for failed authentications.

The follow new control interface events are used for this:
CTRL-EVENT-EAP-PEER-CERT
CTRL-EVENT-EAP-TLS-CERT-ERROR

In addition, there is now an option for matching the server certificate
instead of the full certificate chain for cases where a trusted CA is
not configured or even known. This can be used, e.g., by first probing
the network and learning the server certificate hash based on the new
events and then adding a network configuration with the server
certificate hash after user have accepted it. Future connections will
then be allowed as long as the same server certificate is used.

Authentication server probing can be done, e.g., with following
configuration options:
    eap=TTLS PEAP TLS
    identity=""
    ca_cert="probe://"

Example set of control events for this:
CTRL-EVENT-EAP-STARTED EAP authentication started
CTRL-EVENT-EAP-PROPOSED-METHOD vendor=0 method=21
CTRL-EVENT-EAP-METHOD EAP vendor 0 method 21 (TTLS) selected
CTRL-EVENT-EAP-PEER-CERT depth=0 subject='/C=US/ST=California/L=San Francisco/CN=Server/emailAddress=server@kir.nu' hash=5a1bc1296205e6fdbe3979728efe3920798885c1c4590b5f90f43222d239ca6a
CTRL-EVENT-EAP-TLS-CERT-ERROR reason=8 depth=0 subject='/C=US/ST=California/L=San Francisco/CN=Server/emailAddress=server@kir.nu' err='Server certificate chain probe'
CTRL-EVENT-EAP-FAILURE EAP authentication failed

Server certificate matching is configured with ca_cert, e.g.:
    ca_cert="hash://server/sha256/5a1bc1296205e6fdbe3979728efe3920798885c1c4590b5f90f43222d239ca6a"

This functionality is currently available only with OpenSSL. Other
TLS libraries (including internal implementation) may be added in
the future.
2010-02-13 11:14:23 +02:00
Jouni Malinen
cf123d7f4c OpenSSL: Fix tls_init(NULL) with FIPS-enabled build
The conf argument to tls_init() may be NULL (as it is when using
hostapd), so we must check that here before dereferencing the
pointer.
2010-02-12 20:51:10 +02:00
Jouni Malinen
1056dad796 Fix PKCS#12 use with OpenSSL 1.0.0
Add 40-bit RC2 CBC explicitly since OpenSSL 1.0.0 does not seem to that
anymore with PKCS12_PBE_add(). Furthermore, at least 1.0.0-beta4 crashes
if the needed cipher is not registered when parsing the PKCS#12 data
(this crashing part should be fixed in newer 1.0.0 versions)

Following bug reports are related to the issue:
https://bugzilla.redhat.com/show_bug.cgi?id=541924
https://bugzilla.redhat.com/show_bug.cgi?id=538851
http://rt.openssl.org/Ticket/Display.html?id=2127
http://rt.openssl.org/Ticket/Display.html?id=2128
2010-01-09 00:38:09 +02:00
Jouni Malinen
d2b8812921 Include header file to verify prototypes 2009-12-28 16:01:21 +02:00
Jouni Malinen
b763863d97 GnuTLS: Implement tls_connection_enable_workaround() 2009-12-20 22:08:54 +02:00
Jouni Malinen
9dd37a224b GnuTLS: Add support for piggybacked Application Data 2009-12-20 22:07:59 +02:00
Jouni Malinen
c9a7bbe5a8 GnuTLS: Define empty tls_connection_set_session_ticket_cb()
This allows EAP-FAST build to be completed even if it does not actually
work yet with GnuTLS.
2009-12-20 21:37:36 +02:00
Jouni Malinen
496c5d981e Use wpabuf with tls_connection_ia_send_phase_finished() 2009-12-20 21:33:32 +02:00
Jouni Malinen
2944656925 Allow TLS flags to be configured (allow MD5, disable time checks)
Undocumented (at least for the time being) TLS parameters can now
be provided in wpa_supplicant configuration to enable some workarounds
for being able to connect insecurely to some networks. phase1 and
phase2 network parameters can use following options:
tls_allow_md5=1
- allow MD5 signature to be used (disabled by default with GnuTLS)
tls_disable_time_checks=1
- ignore certificate expiration time

For now, only the GnuTLS TLS wrapper implements support for these.
2009-12-20 19:28:47 +02:00
Jouni Malinen
4a1e97790d GnuTLS: Report certificate validation failures with TLS alert
In addition, show more detailed reason for the failure in debug log.
2009-12-20 19:14:17 +02:00