1 files changed, 66 insertions, 0 deletions
diff --git a/lib/fuzzing/fuzz_ldap_decode.c b/lib/fuzzing/fuzz_ldap_decode.c
new file mode 100644
index 0000000..be286ea
--- /dev/null
+++ b/lib/fuzzing/fuzz_ldap_decode.c
@@ -0,0 +1,66 @@
+/*
+   Fuzzing for ldap_decode.
+   Copyright (C) Michael Hanselmann 2019
+
+   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 "fuzzing/fuzzing.h"
+#include "lib/util/asn1.h"
+#include "libcli/ldap/ldap_message.h"
+#include "libcli/ldap/ldap_proto.h"
+
+int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+	return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
+{
+	TALLOC_CTX *mem_ctx = talloc_init(__FUNCTION__);
+	struct asn1_data *asn1;
+	struct ldap_message *ldap_msg;
+	struct ldap_request_limits limits = {
+		/*
+		 * The default size is currently 256000 bytes
+		 */
+		.max_search_size = 256000
+	};
+	NTSTATUS status;
+
+	/*
+	 * Need to limit the max parse tree depth to 250 to prevent
+	 * ASAN detecting stack overflows.
+	 */
+	asn1 = asn1_init(mem_ctx, 250);
+	if (!asn1) {
+		goto out;
+	}
+
+	asn1_load_nocopy(asn1, buf, len);
+
+	ldap_msg = talloc(mem_ctx, struct ldap_message);
+	if (!ldap_msg) {
+		goto out;
+	}
+
+	status = ldap_decode(
+		asn1, &limits, samba_ldap_control_handlers(), ldap_msg);
+
+out:
+	talloc_free(mem_ctx);
+
+	return 0;
+}