1 files changed, 47 insertions, 0 deletions
diff --git a/projects/pycryptodome/pcd_aes_fuzzer.cc b/projects/pycryptodome/pcd_aes_fuzzer.cc
new file mode 100644
index 00000000..0586aa49
--- /dev/null
+++ b/projects/pycryptodome/pcd_aes_fuzzer.cc
@@ -0,0 +1,47 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "AES.c"
+#include "common.h"
+#include <fuzzer/FuzzedDataProvider.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+
+  if (!size)
+    return 0;
+
+  enum KeySize { AES128 = 16, AES192 = 24, AES256 = 32, kMaxValue = AES256 };
+
+  FuzzedDataProvider stream(data, size);
+  const KeySize keySize = stream.ConsumeEnum<KeySize>();
+  if (stream.remaining_bytes() < keySize)
+    return 0;
+
+  std::vector<uint8_t> keyBuf = stream.ConsumeBytes<uint8_t>(keySize);
+  const uint8_t *key = keyBuf.data();
+
+  BlockBase *state;
+  if (AES_start_operation(key, keySize, reinterpret_cast<AES_State **>(&state)))
+    return 0;
+
+  uint8_t outEnc[size];
+  uint8_t outDec[size];
+
+  AES_encrypt(reinterpret_cast<BlockBase *>(state), data, outEnc, size);
+  AES_decrypt(reinterpret_cast<BlockBase *>(state), data, outDec, size);
+
+  AES_stop_operation(reinterpret_cast<BlockBase *>(state));
+
+  return 0;
+}