Add an easy way to directly use the system PRNG.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/cmd/rng.cpp b/src/cmd/rng.cpp
index 187fbad1e..0fdec2019 100644
--- a/src/cmd/rng.cpp
+++ b/src/cmd/rng.cpp
@@ -7,6 +7,10 @@
 #include "apps.h"
 #include <botan/libstate.h>
 
+#if defined(BOTAN_HAS_SYSTEM_RNG)
+  #include <botan/system_rng.h>
+#endif
+
 namespace {
 
 int rng(int argc, char* argv[])
@@ -22,6 +26,10 @@ int rng(int argc, char* argv[])
       const size_t amt = to_u32bit(argv[argc-1]);
       const bool raw = (argc == 3 && std::string(argv[1]) == "--raw-entropy");
 
+#if defined(BOTAN_HAS_SYSTEM_RNG)
+      std::cout << "System " << hex_encode(system_rng().random_vec(amt)) << "\n";
+#endif
+
       if(!raw)
          {
          AutoSeeded_RNG rng;