Initial checkin1.5.6

1 files changed, 33 insertions, 0 deletions

diff --git a/src/es_file.cpp b/src/es_file.cpp
new file mode 100644
index 000000000..8d2ea80fc
--- /dev/null
+++ b/src/es_file.cpp
@@ -0,0 +1,33 @@
+/*************************************************
+* File EntropySource Source File                 *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/es_file.h>
+#include <botan/conf.h>
+#include <fstream>
+
+namespace Botan {
+
+/*************************************************
+* Gather Entropy from Randomness Source          *
+*************************************************/
+u32bit File_EntropySource::slow_poll(byte output[], u32bit length)
+   {
+   std::vector<std::string> sources = Config::get_list("rng/es_files");
+
+   u32bit read = 0;
+   for(u32bit j = 0; j != sources.size(); ++j)
+      {
+      std::ifstream random_source(sources[j].c_str(), std::ios::binary);
+      if(!random_source) continue;
+      random_source.read((char*)output + read, length);
+      read += random_source.gcount();
+      length -= random_source.gcount();
+      if(length == 0)
+         break;
+      }
+   return read;
+   }
+
+}