2 files changed, 67 insertions, 0 deletions

diff --git a/source3/librpc/ndr/ndr_sec_helper.c b/source3/librpc/ndr/ndr_sec_helper.c
index f8bad6ca61..18d343799e 100644
--- a/source3/librpc/ndr/ndr_sec_helper.c
+++ b/source3/librpc/ndr/ndr_sec_helper.c
@@ -31,6 +31,26 @@ size_t ndr_size_dom_sid(const struct dom_sid *sid, int flags)
 	return 8 + 4*sid->num_auths;
 }
 
+size_t ndr_size_dom_sid28(const struct dom_sid *sid, int flags)
+{
+	struct dom_sid zero_sid;
+
+	if (!sid) return 0;
+
+	ZERO_STRUCT(zero_sid);
+
+	if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
+		return 0;
+	}
+
+	return 8 + 4*sid->num_auths;
+}
+
+size_t ndr_size_dom_sid0(const struct dom_sid *sid, int flags)
+{
+	return ndr_size_dom_sid28(sid, flags);
+}
+
 /*
   return the wire size of a security_ace
 */
@@ -89,3 +109,9 @@ void ndr_print_dom_sid28(struct ndr_print *ndr, const char *name, const struct d
 {
 	ndr_print_dom_sid(ndr, name, sid);
 }
+
+void ndr_print_dom_sid0(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
+{
+	ndr_print_dom_sid(ndr, name, sid);
+}
+
diff --git a/source3/librpc/ndr/sid.c b/source3/librpc/ndr/sid.c
index b6ec045806..ed27375de1 100644
--- a/source3/librpc/ndr/sid.c
+++ b/source3/librpc/ndr/sid.c
@@ -187,3 +187,44 @@ enum ndr_err_code ndr_push_dom_sid28(struct ndr_push *ndr, int ndr_flags, const
 
 	return NDR_ERR_SUCCESS;
 }
+
+/*
+  parse a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
+*/
+enum ndr_err_code ndr_pull_dom_sid0(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
+{
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	if (ndr->data_size == ndr->offset) {
+		ZERO_STRUCTP(sid);
+		return NDR_ERR_SUCCESS;
+	}
+
+	return ndr_pull_dom_sid(ndr, ndr_flags, sid);
+}
+
+/*
+  push a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
+*/
+enum ndr_err_code ndr_push_dom_sid0(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
+{
+	struct dom_sid zero_sid;
+
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	if (!sid) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	ZERO_STRUCT(zero_sid);
+
+	if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	return ndr_push_dom_sid(ndr, ndr_flags, sid);
+}