libcli/security: add stub of conditional ACE code.

This is just the outline of what will come, but first we'll add
conditional ACE SDDL decoding in sddl_conditional_ace.c

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

libcli/security/conditional_ace.c

@@ -0,0 +1,74 @@
+/*
+ *  Unix SMB implementation.
+ *  Functions for understanding conditional ACEs
+ *
+ *  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 "replace.h"
+#include "librpc/gen_ndr/ndr_security.h"
+#include "librpc/gen_ndr/conditional_ace.h"
+#include "libcli/security/security.h"
+#include "libcli/security/conditional_ace.h"
+
+
+struct ace_condition_script *parse_conditional_ace(TALLOC_CTX *mem_ctx,
+						   DATA_BLOB data)
+{
+	return NULL;
+}
+
+
+
+int run_conditional_ace(TALLOC_CTX *mem_ctx,
+			const struct security_token *token,
+			struct ace_condition_script *program,
+			const struct security_descriptor *sd)
+{
+	return ACE_CONDITION_UNKNOWN;
+}
+
+
+/** access_check_conditional_ace()
+ *
+ * Run the conditional ACE from the blob form. Return false if it is
+ * not a valid conditional ACE, true if it is, even if there is some
+ * other error in running it. The *result parameter is set to
+ * ACE_CONDITION_FALSE, ACE_CONDITION_TRUE, or ACE_CONDITION_UNKNOWN.
+ *
+ * ACE_CONDITION_UNKNOWN should be treated pessimistically, as if were
+ * TRUE for deny ACEs, and FALSE for allow ACEs.
+ *
+ * @param[in] ace - the ACE being processed.
+ * @param[in] token - the security token the ACE is processing.
+ * @param[out] result - a ternary result value.
+ *
+ * @return true if it is a valid conditional ACE.
+ */
+
+bool access_check_conditional_ace(const struct security_ace *ace,
+				  const struct security_token *token,
+				  const struct security_descriptor *sd,
+				  int *result)
+{
+	return false;
+}
+
+
+bool conditional_ace_encode_binary(TALLOC_CTX *mem_ctx,
+				   struct ace_condition_script *program,
+				   DATA_BLOB *dest)
+{
+	return false;
+}

libcli/security/conditional_ace.h

@@ -0,0 +1,43 @@
+/*
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+
+   Copyright © Catalyst
+
+   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/>.
+*/
+
+#ifndef _CONDITIONAL_ACE_H_
+#define _CONDITIONAL_ACE_H_
+
+
+struct ace_condition_script *parse_conditional_ace(TALLOC_CTX *mem_ctx,
+						   DATA_BLOB data);
+
+int run_conditional_ace(TALLOC_CTX *mem_ctx,
+			const struct security_token *token,
+			struct ace_condition_script *program,
+			const struct security_descriptor *sd);
+
+
+bool access_check_conditional_ace(const struct security_ace *ace,
+				  const struct security_token *token,
+				  const struct security_descriptor *sd,
+				  int *result);
+
+bool conditional_ace_encode_binary(TALLOC_CTX *mem_ctx,
+				   struct ace_condition_script *program,
+				   DATA_BLOB *dest);
+
+#endif /*_CONDITIONAL_ACE_H_*/