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Fix UPNs handling in lookup_name*() calls 

resolves: rhbz#2078838
This commit is contained in:
Pavel Filipenský 2022-04-27 09:36:53 +02:00
parent f2a9933a49
commit 7ca7d93e6f
2 changed files with 278 additions and 1 deletions
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273
samba-4-15-smbd-upn.patch Normal file
View File

@ -0,0 +1,273 @@
From 25465d0bc77dd712b3d94e488f2cf0583fd7ac04 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Tue, 26 Apr 2022 07:10:56 +0200
Subject: [PATCH 1/5] s3:passdb: Remove trailing spaces in lookup_sid.c
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15054
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 756cd0eed30322ae6dbd5402ec11441387475884)
---
source3/passdb/lookup_sid.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/source3/passdb/lookup_sid.c b/source3/passdb/lookup_sid.c
index a551bcfd24a..3a28cdc68a6 100644
--- a/source3/passdb/lookup_sid.c
+++ b/source3/passdb/lookup_sid.c
@@ -1,4 +1,4 @@
-/*
+/*
Unix SMB/CIFS implementation.
uid/user handling
Copyright (C) Andrew Tridgell 1992-1998
@@ -72,7 +72,7 @@ static bool lookup_unix_group_name(const char *name, struct dom_sid *sid)
If an explicit domain name was given in the form domain\user, it
has to try that. If no explicit domain name was given, we have
to do guesswork.
-*****************************************************************/
+*****************************************************************/
bool lookup_name(TALLOC_CTX *mem_ctx,
const char *full_name, int flags,
@@ -300,7 +300,7 @@ bool lookup_name(TALLOC_CTX *mem_ctx,
goto ok;
}
- /* 6. Builtin aliases */
+ /* 6. Builtin aliases */
if ((flags & LOOKUP_NAME_BUILTIN) &&
lookup_builtin_name(name, &rid))
@@ -882,7 +882,7 @@ NTSTATUS lookup_sids(TALLOC_CTX *mem_ctx, int num_sids,
}
/* First build up the data structures:
- *
+ *
* dom_infos is a list of domains referenced in the list of
* SIDs. Later we will walk the list of domains and look up the RIDs
* in bulk.
@@ -1070,7 +1070,7 @@ NTSTATUS lookup_sids(TALLOC_CTX *mem_ctx, int num_sids,
/*****************************************************************
*THE CANONICAL* convert SID to name function.
-*****************************************************************/
+*****************************************************************/
bool lookup_sid(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
const char **ret_domain, const char **ret_name,
@@ -1104,7 +1104,7 @@ bool lookup_sid(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
goto done;
}
- if ((ret_name != NULL) &&
+ if ((ret_name != NULL) &&
!(*ret_name = talloc_strdup(mem_ctx, name->name))) {
goto done;
}
@@ -1130,7 +1130,7 @@ bool lookup_sid(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
/*****************************************************************
*THE LEGACY* convert SID to id function.
-*****************************************************************/
+*****************************************************************/
static bool legacy_sid_to_unixid(const struct dom_sid *psid, struct unixid *id)
{
@@ -1465,7 +1465,7 @@ fail:
/*****************************************************************
*THE CANONICAL* convert SID to uid function.
-*****************************************************************/
+*****************************************************************/
bool sid_to_uid(const struct dom_sid *psid, uid_t *puid)
{
@@ -1527,7 +1527,7 @@ bool sid_to_uid(const struct dom_sid *psid, uid_t *puid)
/*****************************************************************
*THE CANONICAL* convert SID to gid function.
Group mapping is used for gids that maps to Wellknown SIDs
-*****************************************************************/
+*****************************************************************/
bool sid_to_gid(const struct dom_sid *psid, gid_t *pgid)
{
--
2.36.0
From e884efce61290ad6f4125ab4e3adb08bcc1a800d Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Tue, 26 Apr 2022 07:12:02 +0200
Subject: [PATCH 2/5] s3:passdb: Add support to handle UPNs in lookup_name()
This address an issue if sssd is running and handling nsswitch. If we look up
a user with getpwnam("DOMAIN\user") it will return user@REALM in the passwd
structure. We need to be able to deal with that.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15054
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 2a03fb91c1120718ada9d4b8421044cb7eae7b83)
---
source3/passdb/lookup_sid.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/source3/passdb/lookup_sid.c b/source3/passdb/lookup_sid.c
index 3a28cdc68a6..c14d7a7b123 100644
--- a/source3/passdb/lookup_sid.c
+++ b/source3/passdb/lookup_sid.c
@@ -100,8 +100,18 @@ bool lookup_name(TALLOC_CTX *mem_ctx,
PTR_DIFF(p, full_name));
name = talloc_strdup(tmp_ctx, p+1);
} else {
- domain = talloc_strdup(tmp_ctx, "");
- name = talloc_strdup(tmp_ctx, full_name);
+ char *q = strchr_m(full_name, '@');
+
+ /* Set the domain for UPNs */
+ if (q != NULL) {
+ name = talloc_strndup(tmp_ctx,
+ full_name,
+ PTR_DIFF(q, full_name));
+ domain = talloc_strdup(tmp_ctx, q + 1);
+ } else {
+ domain = talloc_strdup(tmp_ctx, "");
+ name = talloc_strdup(tmp_ctx, full_name);
+ }
}
if ((domain == NULL) || (name == NULL)) {
--
2.36.0
From cc548efd5fa1783e8412e7ac695c8d6be3323d67 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Tue, 26 Apr 2022 12:26:25 +0200
Subject: [PATCH 3/5] s3:passdb: Use already defined pointer in
lookup_name_smbconf()
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit ed8e466854d6d8d6120388716a7b604df7a4db27)
---
source3/passdb/lookup_sid.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/source3/passdb/lookup_sid.c b/source3/passdb/lookup_sid.c
index c14d7a7b123..dbea5578f92 100644
--- a/source3/passdb/lookup_sid.c
+++ b/source3/passdb/lookup_sid.c
@@ -464,7 +464,7 @@ bool lookup_name_smbconf(TALLOC_CTX *mem_ctx,
const char **ret_domain, const char **ret_name,
struct dom_sid *ret_sid, enum lsa_SidType *ret_type)
{
- char *qualified_name;
+ char *qualified_name = NULL;
const char *p;
if ((p = strchr_m(full_name, *lp_winbind_separator())) != NULL) {
@@ -472,16 +472,14 @@ bool lookup_name_smbconf(TALLOC_CTX *mem_ctx,
/* The name is already qualified with a domain. */
if (*lp_winbind_separator() != '\\') {
- char *tmp;
-
/* lookup_name() needs '\\' as a separator */
- tmp = talloc_strdup(mem_ctx, full_name);
- if (!tmp) {
+ qualified_name = talloc_strdup(mem_ctx, full_name);
+ if (qualified_name == NULL) {
return false;
}
- tmp[p - full_name] = '\\';
- full_name = tmp;
+ qualified_name[p - full_name] = '\\';
+ full_name = qualified_name;
}
return lookup_name(mem_ctx, full_name, flags,
--
2.36.0
From 3ee3336f4a3fbb80ccabe6c1494a68286af55437 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Tue, 26 Apr 2022 07:24:10 +0200
Subject: [PATCH 4/5] s3:passdb: Refactor lookup_name_smbconf()
This will be changed to support UPNs too in the next patch.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15054
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 2690310743920dfe20ac235c1e3617e0f421eddc)
---
source3/passdb/lookup_sid.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/source3/passdb/lookup_sid.c b/source3/passdb/lookup_sid.c
index dbea5578f92..de9dd123239 100644
--- a/source3/passdb/lookup_sid.c
+++ b/source3/passdb/lookup_sid.c
@@ -465,13 +465,14 @@ bool lookup_name_smbconf(TALLOC_CTX *mem_ctx,
struct dom_sid *ret_sid, enum lsa_SidType *ret_type)
{
char *qualified_name = NULL;
- const char *p;
+ const char *p = strchr_m(full_name, *lp_winbind_separator());
+ bool is_qualified = p != NULL;
- if ((p = strchr_m(full_name, *lp_winbind_separator())) != NULL) {
+ if (is_qualified) {
/* The name is already qualified with a domain. */
- if (*lp_winbind_separator() != '\\') {
+ if (p != NULL && *lp_winbind_separator() != '\\') {
/* lookup_name() needs '\\' as a separator */
qualified_name = talloc_strdup(mem_ctx, full_name);
--
2.36.0
From 1baa5b170c36854eaa0a5f2c9aba29d50194f750 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Tue, 26 Apr 2022 07:39:12 +0200
Subject: [PATCH 5/5] s3:passdb: Also allow to handle UPNs in
lookup_name_smbconf()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15054
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 28fc44f2852046d03cada161ed1001d04d9e1554)
---
source3/passdb/lookup_sid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/source3/passdb/lookup_sid.c b/source3/passdb/lookup_sid.c
index de9dd123239..426ea3f81bd 100644
--- a/source3/passdb/lookup_sid.c
+++ b/source3/passdb/lookup_sid.c
@@ -466,8 +466,9 @@ bool lookup_name_smbconf(TALLOC_CTX *mem_ctx,
{
char *qualified_name = NULL;
const char *p = strchr_m(full_name, *lp_winbind_separator());
- bool is_qualified = p != NULL;
+ bool is_qualified = p != NULL || strchr_m(full_name, '@') != NULL;
+ /* For DOMAIN\user or user@REALM directly call lookup_name(). */
if (is_qualified) {
/* The name is already qualified with a domain. */
--
2.36.0

6
samba.spec
View File

@ -132,7 +132,7 @@
%define samba_requires_eq() %(LC_ALL="C" echo '%*' | xargs -r rpm -q --qf 'Requires: %%{name} = %%{epoch}:%%{version}\\n' | sed -e 's/ (none):/ /' -e 's/ 0:/ /' | grep -v "is not")
%global baserelease 107
%global baserelease 108
%global samba_version 4.15.5
%global talloc_version 2.3.3
@ -214,6 +214,7 @@ Patch9: samba-4-15-fix-winbind-refresh-tickets.patch
Patch10: samba-4-15-fix-create-local-krb5-conf.patch
Patch11: samba-4-15-username-map.patch
Patch12: samba-4-15-kerberos-clock-skew.patch
Patch13: samba-4-15-smbd-upn.patch
Requires(pre): /usr/sbin/groupadd
Requires(post): systemd
@ -4112,6 +4113,9 @@ fi
%endif
%changelog
* Wed Apr 27 2022 Pavel Filipenský <pfilipen@redhat.com> - 4.15.5-108
- resolves: rhbz#2078838 - Fix UPNs handling in lookup_name*() calls
* Wed Apr 20 2022 Pavel Filipenský <pfilipen@redhat.com> - 4.15.5-106
- resolves: rhbz#2065376 - Fix 'create krb5 conf = yes` when a KDC has a single IP address.
- resolves: rhbz#2076504 - PAM Kerberos authentication fails with a clock skew error