1 files changed, 74 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/rng/rng.cpp b/src/libs/3rdparty/botan/src/lib/rng/rng.cpp
new file mode 100644
index 0000000000..2cf3b7b81e
--- /dev/null
+++ b/src/libs/3rdparty/botan/src/lib/rng/rng.cpp
@@ -0,0 +1,74 @@
+/*
+* (C) 2016 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/rng.h>
+#include <botan/entropy_src.h>
+#include <botan/loadstor.h>
+#include <botan/internal/os_utils.h>
+
+#if defined(BOTAN_HAS_AUTO_SEEDING_RNG)
+  #include <botan/auto_rng.h>
+#endif
+
+namespace Botan {
+
+void RandomNumberGenerator::randomize_with_ts_input(uint8_t output[], size_t output_len)
+   {
+   /*
+   Form additional input which is provided to the PRNG implementation
+   to paramaterize the KDF output.
+   */
+   uint8_t additional_input[16] = { 0 };
+   store_le(OS::get_system_timestamp_ns(), additional_input);
+   store_le(OS::get_high_resolution_clock(), additional_input + 8);
+
+   randomize_with_input(output, output_len, additional_input, sizeof(additional_input));
+   }
+
+void RandomNumberGenerator::randomize_with_input(uint8_t output[], size_t output_len,
+                                                 const uint8_t input[], size_t input_len)
+   {
+   this->add_entropy(input, input_len);
+   this->randomize(output, output_len);
+   }
+
+size_t RandomNumberGenerator::reseed(Entropy_Sources& srcs,
+                                     size_t poll_bits,
+                                     std::chrono::milliseconds poll_timeout)
+   {
+   return srcs.poll(*this, poll_bits, poll_timeout);
+   }
+
+void RandomNumberGenerator::reseed_from_rng(RandomNumberGenerator& rng, size_t poll_bits)
+   {
+   secure_vector<uint8_t> buf(poll_bits / 8);
+   rng.randomize(buf.data(), buf.size());
+   this->add_entropy(buf.data(), buf.size());
+   }
+
+RandomNumberGenerator* RandomNumberGenerator::make_rng()
+   {
+#if defined(BOTAN_HAS_AUTO_SEEDING_RNG)
+   return new AutoSeeded_RNG;
+#else
+   throw Exception("make_rng failed, no AutoSeeded_RNG in this build");
+#endif
+   }
+
+#if defined(BOTAN_TARGET_OS_HAS_THREADS)
+
+#if defined(BOTAN_HAS_AUTO_SEEDING_RNG)
+Serialized_RNG::Serialized_RNG() : m_rng(new AutoSeeded_RNG) {}
+#else
+Serialized_RNG::Serialized_RNG()
+   {
+   throw Exception("Serialized_RNG default constructor failed: AutoSeeded_RNG disabled in build");
+   }
+#endif
+
+#endif
+
+}