1 files changed, 57 insertions, 0 deletions
diff --git a/libs/openssl-3.6.0-beta1/projects/examples/src/cmac.cpp b/libs/openssl-3.6.0-beta1/projects/examples/src/cmac.cpp
new file mode 100644
index 0000000..9e8397c
--- /dev/null
+++ b/libs/openssl-3.6.0-beta1/projects/examples/src/cmac.cpp
@@ -0,0 +1,57 @@
+/* Simple test program for libcrypto (OpenSSL) CMAC ([found on](https://gist.github.com/enkore/56c756d32197f65ae7769e7f9e0a5d35))
+ */
+
+import std;
+#include <stdlib.h>
+
+#include <openssl/cmac.h>
+#include <openssl/core_names.h>
+#include <openssl/evp.h>
+
+template<auto fn>
+using fn_constant = std::integral_constant<decltype(fn), fn>;
+using cmac_ptr = std::unique_ptr<EVP_MAC, fn_constant<EVP_MAC_free>>;
+using cmac_ctx_ptr = std::unique_ptr<EVP_MAC_CTX, fn_constant<EVP_MAC_CTX_free>>;
+
+int wmain()
+{
+    cmac_ptr cmac{EVP_MAC_fetch(nullptr, "CMAC", nullptr)};
+    if (!cmac) {
+        return EXIT_FAILURE;
+    }
+    cmac_ctx_ptr ctx{EVP_MAC_CTX_new(cmac.get())};
+    if (!cmac) {
+        return EXIT_FAILURE;
+    }
+
+    /* The underlying cipher to be used */
+    const EVP_CIPHER* cipher = EVP_aes_256_cbc();
+    const char* cypherName = EVP_CIPHER_get0_name(cipher);
+    const int keyLength = EVP_CIPHER_get_key_length(cipher);
+    const OSSL_PARAM params[2] = {OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_CIPHER, const_cast<char*>(cypherName), 0),
+                                  OSSL_PARAM_construct_end()};
+
+    std::vector<unsigned char> key(keyLength, '\0');
+    unsigned int msgLength = 1024 * 1024 * 1024;
+    std::vector<unsigned char> msg(msgLength, '\0');
+
+    auto t0 = std::chrono::steady_clock::now();
+    if (!EVP_MAC_init(ctx.get(), key.data(), key.size(), params)) {
+        return EXIT_FAILURE;
+    }
+    if (!EVP_MAC_update(ctx.get(), msg.data(), msgLength)) {
+        return EXIT_FAILURE;
+    }
+    size_t resultLength = 0;
+    EVP_MAC_final(ctx.get(), nullptr, &resultLength, 0);
+    std::vector<unsigned char> result(resultLength, '\0');
+    if (!EVP_MAC_final(ctx.get(), result.data(), &resultLength, resultLength)) {
+        return EXIT_FAILURE;
+    }
+    auto t1 = std::chrono::steady_clock::now();
+    std::chrono::duration<double> tdelta = t1 - t0;
+
+    std::wcout << std::format(L"CMAC-AES-256'd {} bytes in {} ({:.1f} MiB/s)", msgLength, tdelta, msgLength / tdelta.count() / 1024 / 1024);
+
+    return 0;
+}