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Now we've fixed srvstr_pull_req_talloc() this isn't
strictly needed, but ensuring pointers are initialized
is best practice to avoid future bugs.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15420
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Mon Aug 14 15:55:43 UTC 2023 on atb-devel-224
Rather than restore to uninitialized, set to NULL as per
modern coding practices.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15420
Reviewed-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Robert Morris <rtm@lcs.mit.edu> noticed that in the case
where srvstr_pull_req_talloc() is being called with
buffer remaining == 0, we don't NULL out the destination
pointed which is *always* done in the codepaths inside
pull_string_talloc(). This prevents a crash in the caller.
Remove knownfail.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15420
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Shows that we indirect through an uninitialized pointer and the client crashes
it's own smbd.
Add knownfail.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15420
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
We will need this to show smbd crashing in the test code.
This will be removed once we're passing the test.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15420
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Add a new function, get_claims_set_for_principal(), that returns the
claims as a CLAIMS_SET structure rather than as a blob. To accommodate
this, move the call to encode_claims_set() out of get_all_claims() and
into get_claims_blob_for_principal().
Being able to get the unencoded claims will save us from having to
decode claims that we just needlessly encoded.
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): Mon Aug 14 05:51:45 UTC 2023 on atb-devel-224
Just to make perfectly clear that it is an out parameter.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This change will simplify things later. Probably.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Overflow is unlikely ever to occur, but you never know.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This matches the use of uint32_t for security_token::num_sids.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Also check whether the message is NULL. Passing NULL to vasprintf() is
undefined behaviour.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Wrapping a function this simple doesn’t gain us very much.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
As the server authentication policy will be non-NULL only for entries
looked up as servers, the krbtgt shouldn’t have an authentication policy
anyway. But we might as well be explicit.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This function doesn’t require a heap allocation.
We also check the result of the function, which we weren’t doing before.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This change ultimately won’t make much difference to responses, as
unrecognized codes are mapped to ERR_GENERIC in any case. But it might
provide some help for debugging.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If we’re going to zero the keys before freeing them, we might as well do
it properly.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If we exited this function early due to an error, h->len would contain
the number of elements that *ought* to be in h->val, but not all of
those elements must have been initialized. Subsequently trying to free
this partially-uninitialized structure with free_Keys() could have bad
results.
Avoid this by ensuring that h->len accurately reports the actual number
of initialized elements.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
To these conversion functions we sometimes pass malloc-allocated HDB
structures, which we free afterwards if conversion fails. If parts of
these structures are still uninitialized when we try to free them, all
sorts of fun things can result.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If the data was received over TCP, it would have had four bytes
subtracted from its length already, in kdc_tcp_call_loop().
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This condition was written backwards — if samba_kdc_fetch() returned
zero, we would ignore any error code returned by
sdb_entry_to_hdb_entry().
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Use a temporary context to allocate these variables. Each variable that
needs to be transferred to the caller is stolen onto an appropriate
talloc context just prior to the function’s returning.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This simplifies the ‘out’ paths.
Every code path that reaches ‘out’ via a goto ensures that ‘ret’ is set
to a nonzero value.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
We should take the common ‘out’ path to ensure that we call
sdb_entry_free() on the entry.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The value of entry->etypes->len ought to be equal to that of
entry->keys.len, and so should be nonzero. But it’s safer not to rely on
that assumption.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
We must not pass a NULL pointer into dom_sid_split_rid().
While we’re at it, switch to using samdb_result_dom_sid_buf(), which
doesn’t require a heap allocation.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If smb_krb5_make_principal() fails without setting the principal,
sdb_entry_free() will try to free whatever memory the uninitialized
member points to.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
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>
