1 files changed, 278 insertions, 0 deletions
diff --git a/source4/librpc/ndr/ndr_sec_helper.c b/source4/librpc/ndr/ndr_sec_helper.c
new file mode 100644
index 0000000000..1256d7dd2d
--- /dev/null
+++ b/source4/librpc/ndr/ndr_sec_helper.c
@@ -0,0 +1,278 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   fast routines for getting the wire size of security objects
+
+   Copyright (C) Andrew Tridgell 2003
+   
+   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 "librpc/gen_ndr/ndr_security.h"
+#include "libcli/security/security.h"
+
+/*
+  return the wire size of a dom_sid
+*/
+size_t ndr_size_dom_sid(const struct dom_sid *sid, int flags)
+{
+	if (!sid) return 0;
+	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
+*/
+size_t ndr_size_security_ace(const struct security_ace *ace, int flags)
+{
+	size_t ret;
+
+	if (!ace) return 0;
+
+	ret = 8 + ndr_size_dom_sid(&ace->trustee, flags);
+
+	switch (ace->type) {
+	case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
+	case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
+	case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
+	case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
+		ret += 4; /* uint32 bitmap ace->object.object.flags */
+		if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
+			ret += 16; /* GUID ace->object.object.type.type */
+		}
+		if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
+			ret += 16; /* GUID ace->object.object.inherited_typeinherited_type */
+		}
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+/*
+  return the wire size of a security_acl
+*/
+size_t ndr_size_security_acl(const struct security_acl *acl, int flags)
+{
+	size_t ret;
+	int i;
+	if (!acl) return 0;
+	ret = 8;
+	for (i=0;i<acl->num_aces;i++) {
+		ret += ndr_size_security_ace(&acl->aces[i], flags);
+	}
+	return ret;
+}
+
+/*
+  return the wire size of a security descriptor
+*/
+size_t ndr_size_security_descriptor(const struct security_descriptor *sd, int flags)
+{
+	size_t ret;
+	if (!sd) return 0;
+	
+	ret = 20;
+	ret += ndr_size_dom_sid(sd->owner_sid, flags);
+	ret += ndr_size_dom_sid(sd->group_sid, flags);
+	ret += ndr_size_security_acl(sd->dacl, flags);
+	ret += ndr_size_security_acl(sd->sacl, flags);
+	return ret;
+}
+
+/*
+  print a dom_sid
+*/
+void ndr_print_dom_sid(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
+{
+	ndr->print(ndr, "%-25s: %s", name, dom_sid_string(ndr, sid));
+}
+
+void ndr_print_dom_sid2(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
+{
+	ndr_print_dom_sid(ndr, name, sid);
+}
+
+void ndr_print_dom_sid28(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
+{
+	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);
+}
+
+
+/*
+  parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
+*/
+enum ndr_err_code ndr_pull_dom_sid2(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
+{
+	uint32_t num_auths;
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+	NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &num_auths));
+	NDR_CHECK(ndr_pull_dom_sid(ndr, ndr_flags, sid));
+	if (sid->num_auths != num_auths) {
+		return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, 
+				      "Bad array size %u should exceed %u", 
+				      num_auths, sid->num_auths);
+	}
+	return NDR_ERR_SUCCESS;
+}
+
+/*
+  parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
+*/
+enum ndr_err_code ndr_push_dom_sid2(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
+{
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+	NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, sid->num_auths));
+	return ndr_push_dom_sid(ndr, ndr_flags, sid);
+}
+
+/*
+  parse a dom_sid28 - this is a dom_sid in a fixed 28 byte buffer, so we need to ensure there are only upto 5 sub_auth
+*/
+enum ndr_err_code ndr_pull_dom_sid28(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
+{
+	enum ndr_err_code status;
+	struct ndr_pull *subndr;
+
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	subndr = talloc_zero(ndr, struct ndr_pull);
+	NDR_ERR_HAVE_NO_MEMORY(subndr);
+	subndr->flags		= ndr->flags;
+	subndr->current_mem_ctx	= ndr->current_mem_ctx;
+
+	subndr->data		= ndr->data + ndr->offset;
+	subndr->data_size	= 28;
+	subndr->offset		= 0;
+
+	NDR_CHECK(ndr_pull_advance(ndr, 28));
+
+	status = ndr_pull_dom_sid(subndr, ndr_flags, sid);
+	if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
+		/* handle a w2k bug which send random data in the buffer */
+		ZERO_STRUCTP(sid);
+	} else if (sid->num_auths == 0 && sid->sub_auths) {
+		talloc_free(sid->sub_auths);
+		sid->sub_auths = NULL;
+	}
+
+	return NDR_ERR_SUCCESS;
+}
+
+/*
+  push a dom_sid28 - this is a dom_sid in a 28 byte fixed buffer
+*/
+enum ndr_err_code ndr_push_dom_sid28(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
+{
+	uint32_t old_offset;
+	uint32_t padding;
+
+	if (!(ndr_flags & NDR_SCALARS)) {
+		return NDR_ERR_SUCCESS;
+	}
+
+	if (sid->num_auths > 5) {
+		return ndr_push_error(ndr, NDR_ERR_RANGE, 
+				      "dom_sid28 allows only upto 5 sub auth [%u]", 
+				      sid->num_auths);
+	}
+
+	old_offset = ndr->offset;
+	NDR_CHECK(ndr_push_dom_sid(ndr, ndr_flags, sid));
+
+	padding = 28 - (ndr->offset - old_offset);
+
+	if (padding > 0) {
+		NDR_CHECK(ndr_push_zero(ndr, padding));
+	}
+
+	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);
+}
+