s3-smbd: Added a become_user_by_session() function.

This uses the provided session_info instead of searching the user via
the vuid. This is useful to work with fake connnection you need to
create if someone connects directly to a rpc service.

Signed-off-by: Jeremy Allison <jra@samba.org>

2 files changed, 19 insertions, 0 deletions

diff --git a/source3/smbd/proto.h b/source3/smbd/proto.h
index 75fc5f8341..a0c94b46c6 100644
--- a/source3/smbd/proto.h
+++ b/source3/smbd/proto.h
@@ -1058,6 +1058,8 @@ bool unbecome_authenticated_pipe_user(void);
 void become_root(void);
 void unbecome_root(void);
 bool become_user(connection_struct *conn, uint16 vuid);
+bool become_user_by_session(connection_struct *conn,
+			    const struct auth_serversupplied_info *session_info);
 bool unbecome_user(void);
 uid_t get_current_uid(connection_struct *conn);
 gid_t get_current_gid(connection_struct *conn);
diff --git a/source3/smbd/uid.c b/source3/smbd/uid.c
index 96c4574827..b554b36054 100644
--- a/source3/smbd/uid.c
+++ b/source3/smbd/uid.c
@@ -528,6 +528,23 @@ bool become_user(connection_struct *conn, uint16 vuid)
 	return True;
 }
 
+bool become_user_by_session(connection_struct *conn,
+			    const struct auth_serversupplied_info *session_info)
+{
+	if (!push_sec_ctx())
+		return false;
+
+	push_conn_ctx();
+
+	if (!change_to_user_by_session(conn, session_info)) {
+		pop_sec_ctx();
+		pop_conn_ctx();
+		return false;
+	}
+
+	return true;
+}
+
 bool unbecome_user(void)
 {
 	pop_sec_ctx();