Expose device model in C API

The C++ API already provides access to the model of the connected device
in NitrokeyManager::get_connected_device_model().  This patch also
exposes this information in the C API by adding NK_get_device_model.  As
there might be no device connected, the function returns a boolean
indicating the connection status and writes the model of the connected
device to a pointer passed as an argument.

1 files changed, 18 insertions, 1 deletions

diff --git a/unittest/test_C_API.cpp b/unittest/test_C_API.cpp
index acfadd2..f38d0b6 100644
--- a/unittest/test_C_API.cpp
+++ b/unittest/test_C_API.cpp
@@ -84,4 +84,21 @@ TEST_CASE("multiple devices with ID", "[BASIC]") {
   }
 
   free (string);
-}
\ No newline at end of file
+}
+
+TEST_CASE("Get device model", "[BASIC]") {
+    auto success = NK_get_device_model(nullptr);
+    REQUIRE(!success);
+
+    NK_logout();
+    NK_device_model model = static_cast<NK_device_model>(3);
+    success = NK_get_device_model(&model);
+    REQUIRE(!success);
+
+    auto result = NK_login_auto();
+    REQUIRE(result != 0);
+    success = NK_get_device_model(&model);
+    REQUIRE(success);
+    REQUIRE((model == NK_PRO || model == NK_STORAGE));
+    NK_logout();
+}