tests: New style fuzzing tool for X.509 certificate parsing

This is a newer version of tests/test-x509 tool.

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/fuzzing/x509/Makefile

@@ -0,0 +1,20 @@
+all: x509
+include ../rules.include
+
+LIBS += $(SRC)/common/libcommon.a
+LIBS += $(SRC)/crypto/libcrypto.a
+LIBS += $(SRC)/tls/libtls.a
+LIBS += $(SRC)/utils/libutils.a
+
+ELIBS += $(SRC)/crypto/libcrypto.a
+ELIBS += $(SRC)/tls/libtls.a
+
+x509: x509.o $(OBJS) $(LIBS)
+	$(LDO) $(LDFLAGS) -o $@ $^ $(LIBS) $(ELIBS)
+
+clean:
+	$(MAKE) -C $(SRC) clean
+	$(MAKE) -C $(WPAS_SRC) clean
+	rm -f x509 *~ *.o *.d ../*~ ../*.o ../*.d
+
+-include $(OBJS:%.o=%.d)

tests/fuzzing/x509/x509.c

@@ -0,0 +1,25 @@
+/*
+ * Testing tool for X.509v3 routines
+ * Copyright (c) 2006-2019, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "tls/x509v3.h"
+#include "../fuzzer-common.h"
+
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+	struct x509_certificate *cert;
+
+	wpa_fuzzer_set_debug_level();
+
+	cert = x509_certificate_parse(data, size);
+	x509_certificate_free(cert);
+	return 0;
+}