Lagom/Fuzzers: Add RSA key parser fuzzer

First issue: #5317

2 files changed, 37 insertions, 0 deletions

diff --git a/Meta/Lagom/Fuzzers/CMakeLists.txt b/Meta/Lagom/Fuzzers/CMakeLists.txt
index 9fe96e001d..1309581e4b 100644
--- a/Meta/Lagom/Fuzzers/CMakeLists.txt
+++ b/Meta/Lagom/Fuzzers/CMakeLists.txt
@@ -33,6 +33,7 @@ add_simple_fuzzer(FuzzRegexPosixExtended)
 add_simple_fuzzer(FuzzShell)
 add_simple_fuzzer(FuzzTTF)
 add_simple_fuzzer(FuzzURL)
+add_simple_fuzzer(FuzzRSAKeyParsing)
 
 if (NOT ENABLE_OSS_FUZZ)
 set(CMAKE_EXE_LINKER_FLAGS "${ORIGINAL_CMAKE_EXE_LINKER_FLAGS} -fsanitize=address")
diff --git a/Meta/Lagom/Fuzzers/FuzzRSAKeyParsing.cpp b/Meta/Lagom/Fuzzers/FuzzRSAKeyParsing.cpp
new file mode 100644
index 0000000000..fd50ac7d3b
--- /dev/null
+++ b/Meta/Lagom/Fuzzers/FuzzRSAKeyParsing.cpp
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibCrypto/PK/RSA.h>
+#include <stddef.h>
+#include <stdint.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+{
+    ByteBuffer rsa_data = ByteBuffer::copy(data, size);
+    Crypto::PK::RSA::parse_rsa_key(rsa_data);
+    return 0;
+}