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If an authentication policy enforces a maximum TGT lifetime for a
Protected User, that limit should stand in place of the four-hour limit
usually applied to Protected Users; we should nevertheless continue to
ensure that forwardable or proxiable tickets are not issued to such
users.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
We should not have two unrelated classes both named SimpleKerberosTests.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
To run these tests standalone, you will need the certificate and private
key of the Certificate Authority. These can be specified together in the
same file with the environment variable CA_CERT, or the private key may
be specified in its own file with CA_PRIVATE_KEY.
If either of these files are encrypted, you can specify the password in
the environment variable CA_PASS.
These tests create a new certificate for the user account, signed with
the private key of the Certificate Authority. We negotiate the reply key
with either of the public-key and Diffie-Hellman PK-INIT variants, and
use the reply key to decrypt the enc-part in the response. We also check
that the KDC’s signatures are valid.
Most of the failures with the Heimdal KDC are due to the wrong nonce
being returned in the reply compared to Windows, which issue is simple
enough to correct.
An example command line for manual testing against Windows:
SMB_CONF_PATH=ad_dc.conf KRB5_CONFIG=krb5.conf SERVICE_USERNAME=win2k19-dc.example.com ADMIN_USERNAME=Administrator ADMIN_PASSWORD=locDCpass ADMIN_KVNO=1 FOR_USER=Administrator USERNAME=Administrator PASSWORD=locDCpass DC_SERVER=win2k19-dc.example.com SERVER=win2k19-dc.example.com DOMAIN=example REALM=example.com PYTHONPATH=bin/python STRICT_CHECKING=1 FAST_SUPPORT=1 CLAIMS_SUPPORT=1 COMPOUND_ID_SUPPORT=1 TKT_SIG_SUPPORT=1 FULL_SIG_SUPPORT=1 GNUTLS_PBKDF2_SUPPORT=1 EXPECT_PAC=1 EXPECT_EXTRA_PAC_BUFFERS=1 CHECK_CNAME=1 CHECK_PADATA=1 KADMIN_IS_TGS=0 FORCED_RC4=1 DEFAULT_ETYPES=36 CA_CERT=./win2k19-ca.pfx CA_PASS=1234 python3 python/samba/tests/krb5/pkinit_tests.py
To set up windows for this I first installed an Certificate Authority with an Enterprise CA.
Then I exported the private key and certificate of the CA:
1. go into the Certification Authority snap-in for the relevant computer,
2. right-clicking the CA
3. clicking ‘All Tasks’ → ‘Back up CA...’
4. and exporting the private key and CA certificate.
(I downloaded the resulting file via smbclient).
After setting up an Enterprise CA, I also needed to edit the domain
controller GPO to enable auto-enrollment, otherwise Windows would
refuse to accept as legitimate any certificates provided by the client.
That can be done by first enabling the policy:
‘Computer Configuration/Policies/Windows Settings/Security Settings/Public Key Policies/Certificate Services Client — Auto-Enrollment’,
and then ticking both ‘Renew expired certificates…’ and ‘Update certificates…’)
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
For each test, we check the authentication logs and ensure the messages
are as we expect.
We only test AS-REQs and TGS-REQs with the Heimdal KDC at the moment,
assuming that MIT doesn’t support logging for those cases.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
We now create a client claims blob and add it to the PAC.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The 'etype' field in a Kerberos request is ordered. Make this fact
clearer by using a tuple or an array to represent etypes rather than a
set.
get_default_enctypes() now returns encryption types in order of
strength. As a consequence, the encryption type chosen by the MIT KDC
matches up with that chosen by Windows, and more tests begin to pass.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Based on tests originally written by Stefan Metzmacher <metze@samba.org>
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri Sep 9 01:11:05 UTC 2022 on sn-devel-184
Since this principal goes through the samba_kdc_fetch_server() path,
setting the canonicalisation flag would cause the principal to be
replaced with the sAMAccountName; this meant requests to
kadmin/changepw@REALM would result in a ticket to krbtgt@REALM. Now we
properly handle canonicalisation for the kadmin/changepw principal.
View with 'git show -b'.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
Pair-Programmed-With: Andreas Schneider <asn@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
The error_data we create already has an explicit length, and should not
be zero-terminated, so we omit the trailing null byte. Previously,
Heimdal builds would leave a superfluous trailing null byte on error
strings, while MIT builds would omit the final character.
The two bytes added to the string's length are for the prepended error
code.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
This also addresses CVE-2020-17049.
MIT Kerberos 1.20 is in pre-release state at the time writing this commit. It
will be released in autumn 2022. We need to support MIT Kerberos 1.19 till
enough distributions have been released with MIT Kerberos 1.20.
Pair-Programmed-With: Robbie Harwood <rharwood@redhat.com>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
