From 4f5d71b4e8582f031ae66dc392035f4f69491b8f Mon Sep 17 00:00:00 2001
From: Brian Gianforcaro <bgianf@serenityos.org>
Date: Sat, 18 Sep 2021 00:35:28 -0700
Subject: [PATCH] Lagom/Fuzzers: Add fuzzer for the LibTLS ASN1 parser

---
 Meta/Lagom/Fuzzers/CMakeLists.txt |  1 +
 Meta/Lagom/Fuzzers/FuzzASN1.cpp   | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 Meta/Lagom/Fuzzers/FuzzASN1.cpp

diff --git a/Meta/Lagom/Fuzzers/CMakeLists.txt b/Meta/Lagom/Fuzzers/CMakeLists.txt
index 19e3a70d22..d84f741529 100644
--- a/Meta/Lagom/Fuzzers/CMakeLists.txt
+++ b/Meta/Lagom/Fuzzers/CMakeLists.txt
@@ -43,6 +43,7 @@ add_simple_fuzzer(FuzzMarkdown LagomMarkdown)
 add_simple_fuzzer(FuzzRegexECMA262 LagomRegex)
 add_simple_fuzzer(FuzzRegexPosixBasic LagomRegex)
 add_simple_fuzzer(FuzzRegexPosixExtended LagomRegex)
+add_simple_fuzzer(FuzzASN1 LagomCrypto LagomTLS)
 add_simple_fuzzer(FuzzSHA1 LagomCrypto)
 add_simple_fuzzer(FuzzSHA256 LagomCrypto)
 add_simple_fuzzer(FuzzSHA384 LagomCrypto)
diff --git a/Meta/Lagom/Fuzzers/FuzzASN1.cpp b/Meta/Lagom/Fuzzers/FuzzASN1.cpp
new file mode 100644
index 0000000000..e1dddca082
--- /dev/null
+++ b/Meta/Lagom/Fuzzers/FuzzASN1.cpp
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2021, Brian Gianforcaro <bgianf@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTLS/Certificate.h>
+#include <stddef.h>
+#include <stdint.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+{
+    (void)TLS::Certificate::parse_asn1({ data, size });
+
+    return 0;
+}