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Also fix style, clarify, and simplify some logic.
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- allow different protocol versions for PAM and NSS
- support more than one protocol version in the responder
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- allow unspecified value in struct pam_data to be NULL
- check if domain structure is initialized in pam_reply
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This fixes a bug with legacy backends where the cached password would be cleared
on a user update.
Using a different attribute we make sure a userPassword coming from the remote
backend does not interfere with a cachedPassword (and vice versa).
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If the data provider is not yet available when NSS and PAM start,
they will generate a segmentation fault when trying to configure
their automatic reconnection to the Data Provider. I've now added
code in sss_dp_init() to detect whether the dp_ctx is NULL and
return EIO.
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When a user from a domain served by the proxy backend changes his
password with passwd the passwd command asks for the old password,
but it is not validated by the pam_chauthtok call in the proxy
backend, because it is running as root.
If the request is coming the unpriviledged socket we now call
pam_authenticate explicitly before pam_chauthtok.
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The domain name is no longer send as an element on its own, but
if set as a member of the response array. If the user was not found
pd->domain is NULL and strlen will seg-fault.
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see https://fedorahosted.org/sssd/ticket/25
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Force a user lookup against the users domain provider.
If a user domain is not specified search though all non fully qualifying
domains.
Perform authentication against the corrent domain auth backend, based on the
user's domain found in the lookup if one was not
specified.
Also move the NSS-DP functions in COMMON-DP as they are reused by the PAM
responder too now.
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We need to stop parsing domains as soon as a caaandidate is found and let the
callback search additional domains if the id is not found.
Should fix ticket #21
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Also convert all places where we were using custom code to parse
config arguments.
And fix a copy&paste error in nss_get_config
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Previously, every DP client was allowed to set its own "retries"
option. This option was ambiguous, and useless. All DP clients
will now use a global option set in the services config called
"reconnection_retries"
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Also setting dctx->domain to NULL is a recipe for segfaults :-)
Assign dctx->domain only when dom actually holds a domain pointer.
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Implement credentials caching in pam responder.
Currently works only for the proxy backend.
Also cleanup pam responder code and mode common code in data provider.
(the data provider should never include responder private headers)
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Change sysdb to always passwd sss_domain_info, not just the domain name.
This way domain specific options can always be honored at the db level.
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This way we do not waste resources starting searching for users/groups in
multiple backends when the first one has the answer.
Also prevents possible race conditions where a user named the same way is found
in multiple backends and the wrong one is returned.
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To be able to correctly filter out duplicate names when multiple non-fully
qualified domains are in use we need to be able to specify the domains order.
This is now accomplished by the configuration paramets 'domains' in the
config/domains entry. 'domains' is a comma separated list of domain names.
This paramter allows also to have disbaled domains in the configuration without
requiring to completely delete them.
The domains list is now kept in a linked list of sss_domain_info objects.
The first domain is also the "default" domain.
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Use common sss_parse_name function in all responders
Simplify responder headers by combining common,cmd,dp in one header and
add name parse structure as part of the common responder context.
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This way LOCAL domains backed by files works as expected too.
Tested with nss_files + pam_unix
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Makes LOCAL a normal backend removing some special handling.
Fix/Add id range filtering and name filtering
Filters uid=0 and gid=0 in the proxy backend as 0 is invalid within
sysdb and was causing getxxent calls to fail completely.
Fix nss_ncache_check_xxx calls to avoid dirtying the 'ret' variable and
causing some unwanted failures.
Change sysdb to always return the uid number when searching member entries so
that id range filtering can be perfomed also in group searhes (does not work
with legacy backends)
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A new nss_parse_name function uses pcre to parse names, this makes
it possible, in future, to make the filter user configurable.
Add a new filter mechanism to filter out users that uses the negative cache by
setting a permanet negative entry.
Rework the entry points where the negative cache is checked for.
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May happen at startup if, for some reason dp is very slow to start and we
receive a request before a reconnection is rescheduled in the responder dp
reconnection code.
This shouldn't happen normally so make it clear with a debug statement.
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Make nss_ctx a private pointer of the common resp_ctx
Use sss_process_init and remove all duplicate functions from nsssrv.c
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The structure we copy the domain pointerr on is not zero when allocated.
We need to zero it ourselves or we get segfaults later on.
A cut&paste error caused us to call the wrong getpw function.
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forgot to commit a few changes
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This fixes some old 'Fixme's :)
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Now it can load from scratch default configuration that is valid for all
daemons.
First thing, make it possible for each daemon/provider to set its own debug
level in its configuration entry.
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When I converted from using just the domain name to passing down the info
structure I goofed how to test if we were willing to attach the local domain to
the user/group names or not.
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As for positive caches, negative caches are implement for all queries
except enumerations.
Also set the correct requires in sssd.spec as we now depend directly on tdb as
well.
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Gecos, homedir and shell are optional, fix the responder not to refuse to return
the user completely if they are missing, replace an empty homedir with "/".
Also fix fullname vs gecos, and always return gecos for NSS data.
On user creation set gecos to the same value as the user Full Name, to help
populate the gecos field with data that makes sense.
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In the nss communication protocol we were treating uids and gids as 64 bit
values, but uids and gids are really u32 values, change the protocol to reflect
the real size.
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Also shorten names oh other user attributes.
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