1 files changed, 57 insertions, 0 deletions
diff --git a/src/rng.cpp b/src/rng.cpp
new file mode 100644
index 000000000..59d4e576d
--- /dev/null
+++ b/src/rng.cpp
@@ -0,0 +1,57 @@
+/*************************************************
+* Random Number Generator Base Source File       *
+* (C) 1999-2008 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/rng.h>
+#include <botan/secmem.h>
+#include <botan/util.h>
+
+namespace Botan {
+
+/*************************************************
+* Default fast poll for EntropySources           *
+*************************************************/
+u32bit EntropySource::fast_poll(byte buf[], u32bit len)
+   {
+   return this->slow_poll(buf, len);
+   }
+
+/*************************************************
+* Get a single random byte                       *
+*************************************************/
+byte RandomNumberGenerator::next_byte()
+   {
+   byte out;
+   this->randomize(&out, 1);
+   return out;
+   }
+
+/*************************************************
+* Add entropy to internal state                  *
+*************************************************/
+void RandomNumberGenerator::add_entropy(const byte random[], u32bit length)
+   {
+   this->add_randomness(random, length);
+   }
+
+/*************************************************
+* Add entropy to internal state                  *
+*************************************************/
+u32bit RandomNumberGenerator::add_entropy(EntropySource& source,
+                                          bool slow_poll)
+   {
+   SecureVector<byte> buffer(1024);
+   u32bit bytes_gathered = 0;
+
+   if(slow_poll)
+      bytes_gathered = source.slow_poll(buffer, buffer.size());
+   else
+      bytes_gathered = source.fast_poll(buffer, buffer.size());
+
+   this->add_entropy(buffer, bytes_gathered);
+
+   return entropy_estimate(buffer, bytes_gathered);
+   }
+
+}