Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/source3/auth/server_info_sam.c b/source3/auth/server_info_sam.c
new file mode 100644
index 0000000..71a52f8
--- /dev/null
+++ b/source3/auth/server_info_sam.c
@@ -0,0 +1,124 @@
+/*
+   Unix SMB/CIFS implementation.
+   Authentication utility functions
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Andrew Bartlett 2001
+   Copyright (C) Jeremy Allison 2000-2001
+   Copyright (C) Rafal Szczesniak 2002
+   Copyright (C) Volker Lendecke 2006
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "auth.h"
+#include "nsswitch/winbind_client.h"
+#include "passdb.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+
+/***************************************************************************
+ Is the incoming username our own machine account ?
+ If so, the connection is almost certainly from winbindd.
+***************************************************************************/
+
+static bool is_our_machine_account(const char *username)
+{
+	bool ret;
+	size_t ulen = strlen(username);
+	const char *nb_name = lp_netbios_name();
+	size_t nb_namelen = strlen(nb_name);
+
+	if (ulen == 0 || username[ulen-1] != '$') {
+		return false;
+	}
+	if (nb_namelen != ulen-1) {
+		return false;
+	}
+	ret = strnequal(username, nb_name, ulen-1);
+	return ret;
+}
+
+/***************************************************************************
+ Make (and fill) a user_info struct from a struct samu
+***************************************************************************/
+
+NTSTATUS make_server_info_sam(TALLOC_CTX *mem_ctx,
+			      struct samu *sampass,
+			      struct auth_serversupplied_info **pserver_info)
+{
+	struct passwd *pwd;
+	struct auth_serversupplied_info *server_info;
+	const char *username = pdb_get_username(sampass);
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+	NTSTATUS status;
+
+	server_info = make_server_info(tmp_ctx);
+	if (server_info == NULL) {
+		status = NT_STATUS_NO_MEMORY;
+		goto out;
+	}
+
+	pwd = Get_Pwnam_alloc(tmp_ctx, username);
+	if (pwd == NULL) {
+		DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
+			  pdb_get_username(sampass)));
+		status = NT_STATUS_NO_SUCH_USER;
+		goto out;
+	}
+
+	status = samu_to_SamInfo3(server_info,
+				  sampass,
+				  lp_netbios_name(),
+				  &server_info->info3,
+				  &server_info->extra);
+	if (!NT_STATUS_IS_OK(status)) {
+		goto out;
+	}
+
+	server_info->unix_name = talloc_move(server_info, &pwd->pw_name);
+
+	server_info->utok.gid = pwd->pw_gid;
+	server_info->utok.uid = pwd->pw_uid;
+
+	if (IS_DC && is_our_machine_account(username)) {
+		/*
+		 * This is a hack of monstrous proportions.
+		 * If we know it's winbindd talking to us,
+		 * we know we must never recurse into it,
+		 * so turn off contacting winbindd for this
+		 * entire process. This will get fixed when
+		 * winbindd doesn't need to talk to smbd on
+		 * a PDC. JRA.
+		 */
+
+		(void)winbind_off();
+
+		DEBUG(10, ("make_server_info_sam: our machine account %s "
+			   "turning off winbindd requests.\n", username));
+	}
+
+	DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
+		 pdb_get_username(sampass), server_info->unix_name));
+
+	*pserver_info = talloc_move(mem_ctx, &server_info);
+
+	status = NT_STATUS_OK;
+out:
+	talloc_free(tmp_ctx);
+
+	return status;
+}