Add fuzz test for v3name

v3name_fuzzer build modifications

create 99-test_fuzz_v3name_fuzzer.t

test corpus for cve-2023-0286

Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20274)

1 files changed, 44 insertions, 0 deletions

diff --git a/fuzz/v3name.c b/fuzz/v3name.c
new file mode 100644
index 0000000000..2c7f94e17f
--- /dev/null
+++ b/fuzz/v3name.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2012-2023 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <string.h>
+#include <openssl/e_os2.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include "internal/nelem.h"
+#include "fuzzer.h"
+
+int FuzzerInitialize(int *argc, char ***argv)
+{
+    return 1;
+}
+
+int FuzzerTestOneInput(const uint8_t* data, size_t size){
+    GENERAL_NAME *namesa;
+    GENERAL_NAME *namesb;
+
+    const unsigned char *derp = data;
+    /*
+     * We create two versions of each GENERAL_NAME so that we ensure when
+     * we compare them they are always different pointers.
+     */
+    namesa = d2i_GENERAL_NAME(NULL, &derp, size);
+    derp = data;
+    namesb = d2i_GENERAL_NAME(NULL, &derp, size);
+    GENERAL_NAME_cmp(namesa, namesb);
+    if (namesa != NULL)
+        GENERAL_NAME_free(namesa);
+    if (namesb != NULL)
+        GENERAL_NAME_free(namesb);
+    return 0;
+}
+
+void FuzzerCleanup(void)
+{
+}