TPM (FreeBSD): add support

src/detection/tpm/tpm_bsd.c

@@ -0,0 +1,17 @@
+#include "tpm.h"
+#include "common/sysctl.h"
+
+const char* ffDetectTPM(FFTPMResult* result)
+{
+    if (ffSysctlGetString("dev.tpmcrb.0.%desc", &result->description) != NULL)
+        return "TPM device is not found or TPM kernel module is not loaded";
+
+    if (ffStrbufContainS(&result->description, "2.0"))
+        ffStrbufSetStatic(&result->version, "2.0");
+    else if (ffStrbufContainS(&result->description, "1.2"))
+        ffStrbufSetStatic(&result->version, "1.2");
+    else
+        ffStrbufSetStatic(&result->version, "unknown");
+
+    return "Not supported on this platform";
+}