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assumption that we have one socket everywhere
while doing so I discovered a few bugs!
1) the clientgen session retarget code if used from smbd or nmbd would
cause a crash as it called close_sockets() which closed our main
socket! fixed by removing close_sockets() completely - it is unnecessary
2) the caching in client_addr() and client_name() was bogus - it could
easily get fooled and give the wrong result. fixed.
3) the retarget could could recurse, allowing an easy denial of
service attack on nmbd. fixed.
on the glibc source code and are safer than the traditional popen as
they don't use a shell to exec the requested command. Now we have
these functions they can be tightened up (environment etc.) as required
to make a safe popen. It should now be safe to add the environement
variable loading code to loadparm.c
Jeremy.
This fixes our netbios scope handling. We now have a 'netbios scope' option
in smb.conf and the scope option is removed from make_nmb_name()
this was prompted by a bug in our PDC finding code where it didn't append
the scope to the query of the '*' name.
I also fixed up the lookup_pdc_name() code so that it now works, even
with a NT server that insists on replying to udp/138.
The method I used to match packets was to use the mailslot string as a
datagram ID. The true dgm_id doesn't work as NT doesn't set it
correctly. uggh.
PS: Jeremy, I had to change your code quite a bit, are you sure this
worked with a Samba PDC?? The code looked broken, it got the offsets
wrong in the SMB portion of the packet and filled in the IP
incorrectly.
done a minimal amout of clean-up in the Makefile, removing unnecessary
modules from the link stage. this is not complete, yet, and will
involve some changes, for example to smbd, to remove dependencies on
the password database API that shouldn't be there. for example,
smbd should not ever call getsmbpwXXX() it should call the Samr or Lsa
API.
this first implementation has minor problems with not reinstantiating
the same services as the caller. the "homes" service is a good example.
pdus, and then feeds them over either a "local" function call or a "remote"
function call to an msrpc service. the "remote" msrpc daemon, on the
other side of a unix socket, then calls the same "local" function that
smbd would, if the msrpc service were being run from inside smbd.
this allows a transition from local msrpc services (inside the same smbd
process) to remote (over a unix socket).
removed reference to pipes_struct in msrpc services. all msrpc processing
functions take rpcsrv_struct which is a structure containing state info
for the msrpc functions to decode and create pdus.
created become_vuser() which does everything not related to connection_struct
that become_user() does.
removed, as best i could, connection_struct dependencies from the nt spoolss
printing code.
todo: remove dcinfo from rpcsrv_struct because this stores NETLOGON-specific
info on a per-connection basis, and if the connection dies then so does
the info, and that's a fairly serious problem.
had to put pretty much everything that is in user_struct into parse_creds.c
to feed unix user info over to the msrpc daemons. why? because it's
expensive to do unix password/group database lookups, and it's definitely
expensive to do nt user profile lookups, not to mention pretty difficult
and if you did either of these it would introduce a complication /
unnecessary interdependency. so, send uid/gid/num_groups/gid_t* +
SID+num_rids+domain_group_rids* + unix username + nt username + nt domain
+ user session key etc. this is the MINIMUM info identified so far that's
actually implemented. missing bits include the called and calling
netbios names etc. (basically, anything that can be loaded into
standard_sub() and standard_sub_basic()...)
one horrible cut / paste job from smbd, plus a code split of shared
components between the two.
the job is not _yet_ complete, as i need to be able to do a become_user()
call for security reasons. i picked lsarpcd first because you don't
_need_ security on it (microsoft botched so badly on this one, it's not
real. at least they fixed this in nt5 with restrictanonymous=0x2).
fixing this involves sending the current smb and unix credentials down
the unix pipe so that the daemon it eventually goes to can pick them
up at the other end.
i can't believe this all worked!!!
is to pass DOMAIN_NAME$ and SEC_CHAN_DOMAIN instead of WKSTA_NAME$ and
SEC_CHAN_WKSTA.
modified check_domain_security to determine if domain name is own domain,
and to use wksta trust account if so, otherwise check "trusting domains"
parameter and use inter-domain trust account if so, otherwise return
False.
samr_lookup_rids() moved to a dynamic memory structure not a
static one limited to 32 RIDs. cli_pipe.c reading wasn't checking
ERRmoredata when DOS error codes negotiated (this terminates
MSRPC code with prejudice).
weird unixware stuff) into _Get_Pwnam() to fix a memory allocation bug.
Note that the Get_Pwnam() function now returns a const struct passwd *
as a hint to other developers not to change entries in the struct
passwd.
----------------------------
- removed DOM_RID4
- removed SAMR_UNKNOWN_32
- added SAMR_SET_USERINFO (opcode 0x32)
- added level 0x1 to SAMR_QUERY_DOM_INFO (needed for create user)
- fixed pwdb_gethexpwd() it was failing on XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
- added mod_sam21pwd_entry()
- preparing to call mod_sam21pwd_entry()
- added "user session key" to user_struct.dc. this is md4(nt#) and is
needed to decode user's clear-text passwords in SAMR_SET_USERINFO.
- split code out in chgpasswd.c to decode 516 byte password buffers.
LsaLookupSids etc from within SamrQueryAliasMembers, for example.
fnum is now a parameter to client functions. thanks to mike black
for starting the ball rolling.
- split sam_passwd and smb_passwd into separate higher-order function tables
- renamed struct smb_passwd's "smb_user" to "unix_user". added "nt_user"
plus user_rid, and added a "wrap" function in both sam_passwd and smb_passwd
password databases to fill in the blank entries that are not obtained
from whatever password database API instance is being used.
NOTE: whenever a struct smb_passwd or struct sam_passwd is used, it MUST
be initialised with pwdb_sam_init() or pwd_smb_init(), see chgpasswd.c
for the only example outside of the password database APIs i could find.
- added query_useraliases code to rpcclient.
- dealt with some nasty interdependencies involving non-smbd programs
and the password database API. this is still not satisfactorily
resolved completelely, but it's the best i can do for now.
- #ifdef'd out some password database options so that people don't
mistakenly set them unless they recompile to _use_ those options.
lots of debugging done, it's still not finished. the unix/NT uid/gid
and user-rid/group-rid issues are better, but not perfect. the "BUILTIN"
domain is still missing: users cannot be added to "BUILTIN" groups yet,
as we only have an "alias" db API and a "group" db API but not "builtin-alias"
db API...
Tidied up some of the mess (no other word for it). Still doesn't
compile cleanly. There are calls with incorrect parameters that
don't seem to be doing the right thing.
This code still needs surgery :-(.
Jeremy.
the pre-alpha "domain group" etc parameters have disappeared.
- interactive debug detection
- re-added mem_man (andrew's memory management, detects memory corruption)
- american spellings of "initialise" replaced with english spelling of
"initialise".
- started on "lookup_name()" and "lookup_sid()" functions. proper ones.
- moved lots of functions around. created some modules of commonly used
code. e.g the password file locking code, which is used in groupfile.c
and aliasfile.c and smbpass.c
- moved RID_TYPE_MASK up another bit. this is really unfortunate, but
there is no other "fast" way to identify users from groups from aliases.
i do not believe that this code saves us anything (the multipliers)
and puts us at a disadvantage (reduces the useable rid space).
the designers of NT aren't silly: if they can get away with a user-
interface-speed LsaLookupNames / LsaLookupSids, then so can we. i
spoke with isaac at the cifs conference, the only time for example that
they do a security context check is on file create. certainly not on
individual file reads / writes, which would drastically hit their
performance and ours, too.
- renamed myworkgroup to global_sam_name, amongst other things, when used
in the rpc code. there is also a global_member_name, as we are always
responsible for a SAM database, the scope of which is limited by the role
of the machine (e.g if a member of a workgroup, your SAM is for _local_
logins only, and its name is the name of your server. you even still
have a SID. see LsaQueryInfoPolicy, levels 3 and 5).
- updated functionality of groupname.c to be able to cope with names
like DOMAIN\group and SERVER\alias. used this code to be able to
do aliases as well as groups. this code may actually be better
off being used in username mapping, too.
- created a connect to serverlist function in clientgen.c and used it
in password.c
- initialisation in server.c depends on the role of the server. well,
it does now.
- rpctorture. smbtorture. EXERCISE EXTREME CAUTION.
I did this when I saw yet another bug report complaining about
smbclient intermittently missing files. Rather than applying more
patches to smbclient it was better to move to the more robust
clientgen.c code.
The conversion wasn't perfect, I probably lost some features of
smbclient while doing it, but at least smbclient should be consistent
now. It if fails it should _always_ fail rather than giving people the
false impression of a reliable utility.
the tar stuff seems to work, but hasn't had much testing as I never
use it myself. I'm sure someone will find bugs in my conversion of
smbtar.c. It was quite tricky as it did a lot of its own SMB calls. It
now uses clientgen.c exclusively.
smbclient is still quite messy, but at least it doesn't build its own
SMB packets.
I haven't touched smbmount as I never use it. Mike, do you want to
convert smbmount to use clientgen.c?
param/loadparm.c: Removed "networkstation user login", "domain controller", and "domain sid" parameters.
passdb/passdb.c: Removed "networkstation user login" code and changed bug test code
to only check once for a bad password server. This will stop the
complaints of many "bad login" audit records in NT PDC logs.
utils/smbpasswd.c: Removed check for "domain controller".
Jeremy.
smbd/chgpasswd.c: Fixed (my) stupid bug where I was returning stack based variables. Doh !
smbd/trans2.c: Allows SETFILEINFO as well as QFILEINFO on directory handles.
Jeremy.
- removed debug info in struni2 and unistr2 (security risk)
- rpc_pipe function was getting pointer to data then calling realloc *dur*
- password check function, the start of "credential checking",
user, wks, domain, pass as the credentials (not just user,pass which
is incorrect in a domain context)
- cli_write needs to return ssize_t not size_t, because total can be -1
if the write fails.
- fixed signed / unsigned warnings (how come i don't get those any more
when i compile with gcc???)
- nt password change added in smbd. yes, jeremy, i verified that the
SMBtrans2 version still works.
