initial commit

fuzz/fuzz_ctr.cpp

@@ -0,0 +1,29 @@
+// Copyright (c) 2025-2026, Brandon Lehmann
+// BSD 3-Clause License (see LICENSE)
+
+#include "tinyaes/ctr.h"
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    if (size < 33)
+        return 0;
+
+    // First 16 bytes = key, next 16 bytes = IV, rest = plaintext
+    std::vector<uint8_t> key(data, data + 16);
+    std::vector<uint8_t> iv(data + 16, data + 32);
+    std::vector<uint8_t> plaintext(data + 32, data + size);
+    std::vector<uint8_t> ct, pt;
+
+    auto result = tinyaes::ctr_crypt(key, iv, plaintext, ct);
+    if (result != tinyaes::Result::Success)
+        return 0;
+
+    result = tinyaes::ctr_crypt(key, iv, ct, pt);
+    assert(result == tinyaes::Result::Success);
+    assert(pt == plaintext);
+
+    return 0;
+}