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Modern Kerberos implementations have either defines or enums for these
key types, which makes doing #ifdef difficult. This shows up in files
such as libnet_samsync_keytab.c, the bulk of which is not compiled on
current Fedora 12, for example.
The downside is that this makes Samba unconditionally depend on the
arcfour-hmac-md5 encryption type at build time. We will no longer
support libraries that only support the DES based encryption types.
However, the single-DES types that are supported in common with AD are
already painfully weak - so much so that they are disabled by default
in modern Kerberos libraries.
If not found, ADS support will not be compiled in.
This means that our 'net ads join' will no longer set the
ACB_USE_DES_KEY_ONLY flag, and we will always try to use
arcfour-hmac-md5.
A future improvement would be to remove the use of the DES encryption
types totally, but this would require that any ACB_USE_DES_KEY_ONLY
flag be removed from existing joins.
Andrew Bartlett
Signed-off-by: Simo Sorce <idra@samba.org>
This patch is to fix bug 7099. It stores the current password in the
previous password key when the password is changed. It also check the
user ticket against previous password.
Signed-off-by: Günther Deschner <gd@samba.org>
All the callers just want the PAC_LOGON_INFO, so search for that in
ads_verify_ticket(), and don't bother the callers with the rest of the
PAC.
This change makes sense on it's own (removing boilerplate wrappers
that just confuse the code), but it also makes it much easier to
implement a matching ads_verify_ticket() function in Samba4 for the
s3compat proposal.
Andrew Bartlett
Signed-off-by: Günther Deschner <gd@samba.org>
The first is "kerberos method" and replaces the "use kerberos keytab"
with an enum. Valid options are:
secrets only - use only the secrets for ticket verification (default)
system keytab - use only the system keytab for ticket verification
dedicated keytab - use a dedicated keytab for ticket verification.
secrets and keytab - use the secrets.tdb first, then the system keytab
For existing installs:
"use kerberos keytab = yes" corresponds to secrets and keytab
"use kerberos keytab = no" corresponds to secrets only
The major difference between "system keytab" and "dedicated keytab" is
that the latter method relies on kerberos to find the correct keytab
entry instead of filtering based on expected principals.
The second parameter is "dedicated keytab file", which is the keytab
to use when in "dedicated keytab" mode. This keytab is only used in
ads_verify_ticket.
Another preparation to convert secrets.c to dbwrap: The dbwrap API does not
provide a sane tdb_lock_with_timeout abstraction. In the clustered case the DC
mutex is needed per-node anyway, so it is perfectly fine to use a local mutex
only.
(This used to be commit f94a63cd8f)
bugs in various places whilst doing this (places that assumed
BOOL == int). I also need to fix the Samba4 pidl generation
(next checkin).
Jeremy.
(This used to be commit f35a266b3c)
when verifying a ticket from winbindd_pam.c.
I've found during multiple, fast, automated SSH logins (such
as from a cron script) that the replay cache in MIT's krb5
lib will occasionally fail the krb5_rd_req() as a replay attack.
There seems to be a small window during which the MIT krb5
libs could reproduce identical time stamps for ctime and cusec
in the authenticator since Unix systems only give back
milli-seconds rather than the micro-seconds needed by the
authenticator. Checked against MIT 1.5.1. Have not
researched how Heimdal does it.
My thinking is that if someone can spoof the KDC and TDS
services we are pretty hopeless anyways.
(This used to be commit cbd33da9f7)
to return a NT_STATUS_TIME_DIFFERENCE_AT_DC error to
a client when there's clock skew. Will help people
debug this. Prepare us for being able to return the
correct sessionsetupX "NT_STATUS_MORE_PROCESSING_REQUIRED"
error with associated krb5 clock skew error to allow
clients to re-sync time with us when we're eventually
able to be a KDC.
Jeremy.
(This used to be commit c426340fc7)
Major points of interest:
* Figure the DES salt based on the domain functional level
and UPN (if present and applicable)
* Only deal with the DES-CBC-MD5, DES-CBC-CRC, and RC4-HMAC
keys
* Remove all the case permutations in the keytab entry
generation (to be partially re-added only if necessary).
* Generate keytab entries based on the existing SPN values
in AD
The resulting keytab looks like:
ktutil: list -e
slot KVNO Principal
---- ---- ---------------------------------------------------------------------
1 6 host/suse10.plainjoe.org@COLOR.PLAINJOE.ORG (DES cbc mode with CRC-32)
2 6 host/suse10.plainjoe.org@COLOR.PLAINJOE.ORG (DES cbc mode with RSA-MD5)
3 6 host/suse10.plainjoe.org@COLOR.PLAINJOE.ORG (ArcFour with HMAC/md5)
4 6 host/suse10@COLOR.PLAINJOE.ORG (DES cbc mode with CRC-32)
5 6 host/suse10@COLOR.PLAINJOE.ORG (DES cbc mode with RSA-MD5)
6 6 host/suse10@COLOR.PLAINJOE.ORG (ArcFour with HMAC/md5)
7 6 suse10$@COLOR.PLAINJOE.ORG (DES cbc mode with CRC-32)
8 6 suse10$@COLOR.PLAINJOE.ORG (DES cbc mode with RSA-MD5)
9 6 suse10$@COLOR.PLAINJOE.ORG (ArcFour with HMAC/md5)
The list entries are the two basic SPN values (host/NetBIOSName & host/dNSHostName)
and the sAMAccountName value. The UPN will be added as well if the machine has
one. This fixes 'kinit -k'.
Tested keytab using mod_auth_krb and MIT's telnet. ads_verify_ticket()
continues to work with RC4-HMAC and DES keys.
(This used to be commit 6261dd3c67)
prevents a nasty failure condition in winbindd's pam_auth where a tgt
and a service ticket could have been succefully retrieved, but just not
validated.
Guenther
(This used to be commit a75dd80c62)
smb_krb5_parse_name_norealm_conv that pull/push from unix charset
to utf8 (which krb5 uses on the wire). This should fix issues when
the unix charset is not compatible with or set to utf8.
Jeremy.
(This used to be commit 37ab42afbc)
krb5_rd_req could decrypt the ticket but that ticket is just not valid
at the moment (either not yet valid or already expired). (This also
prevents an MIT kerberos related crash)
Guenther
(This used to be commit 8a0c1933d3)
ticket was encrypted using a DES key (and the Windows KDC still puts
CKSUMTYPE_HMAC_MD5_ARCFOUR in the PAC).
In that case, return to old behaviour and ignore the PAC.
Thanks to Chengjie Liu <chengjie.liu@datadomain.com>.
Guenther
(This used to be commit 48d8a9dd9f)
* \PIPE\unixinfo
* winbindd's {group,alias}membership new functions
* winbindd's lookupsids() functionality
* swat (trunk changes to be reverted as per discussion with Deryck)
(This used to be commit 939c3cb5d7)
