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Viewing changes to src/es_file.cpp

  • Committer: Package Import Robot
  • Author(s): Laszlo Boszormenyi (GCS)
  • Date: 2018-03-01 22:23:25 UTC
  • mfrom: (1.2.2)
  • Revision ID: package-import@ubuntu.com-20180301222325-7p7vc45gu3hta34d
Tags: 2.4.0-2
* Don't remove .doctrees from the manual if it doesn't exist.
* Don't specify parallel to debhelper.

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src/es_file.cpp
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/*************************************************
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* File EntropySource Source File                 *
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* (C) 1999-2007 The Botan Project                *
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*************************************************/
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#include <botan/es_file.h>
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#include <botan/config.h>
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#include <fstream>
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namespace Botan {
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/*************************************************
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* Gather Entropy from Randomness Source          *
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*************************************************/
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u32bit File_EntropySource::slow_poll(byte output[], u32bit length)
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   {
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   std::vector<std::string> sources =
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      global_config().option_as_list("rng/es_files");
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   u32bit read = 0;
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   for(u32bit j = 0; j != sources.size(); ++j)
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      {
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      std::ifstream random_source(sources[j].c_str(), std::ios::binary);
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      if(!random_source) continue;
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      random_source.read((char*)output + read, length);
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      read += random_source.gcount();
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      length -= random_source.gcount();
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      if(length == 0)
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         break;
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      }
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   return read;
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   }
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}