1 files changed, 0 insertions, 65 deletions
diff --git a/src/lib/entropy/p9_darn/p9_darn.cpp b/src/lib/entropy/p9_darn/p9_darn.cpp
deleted file mode 100644
index 8731b94e1..000000000
--- a/src/lib/entropy/p9_darn/p9_darn.cpp
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
-* (C) 2019 Jack Lloyd
-*
-* Botan is released under the Simplified BSD License (see license.txt)
-*/
-
-#include <botan/internal/p9_darn.h>
-#include <botan/cpuid.h>
-
-namespace Botan {
-
-namespace {
-
-bool read_darn(secure_vector<uint64_t>& seed)
-   {
-   const size_t DARN_RETRIES = 512;
-
-   for(size_t i = 0; i != DARN_RETRIES; ++i)
-      {
-      uint64_t r = 0;
-
-      // DARN 0: 32-bit conditioned, 1: 64-bit condition, 2: 64-bit raw (ala RDSEED)
-      asm volatile("darn %0, 2" : "=r" (r));
-
-      // DARN indicates error by 0xFF..FF, ie is biased (!?!?)
-      if((~r) != 0)
-         {
-         seed.push_back(r);
-         return true;
-         }
-      }
-
-   return false; // failed to produce an output after many attempts
-   }
-
-}
-
-size_t POWER9_DARN::poll(RandomNumberGenerator& rng)
-   {
-   const size_t DARN_BYTES = 1024;
-   static_assert(DARN_BYTES % 8 == 0, "Bad DARN configuration");
-
-   if(CPUID::has_darn_rng())
-      {
-      secure_vector<uint64_t> seed;
-      seed.reserve(DARN_BYTES / 8);
-
-      for(size_t p = 0; p != DARN_BYTES / 8; ++p)
-         {
-         if(!read_darn(seed))
-            break;
-         }
-
-      if(seed.size() > 0)
-         {
-         rng.add_entropy(reinterpret_cast<const uint8_t*>(seed.data()),
-                         seed.size() * sizeof(uint32_t));
-         }
-      }
-
-   // DARN is used but not trusted
-   return 0;
-   }
-
-}