Botan::Entropy_Sources Class Reference

#include <entropy_src.h>

Public Member Functions
void	add_source (std::unique_ptr< Entropy_Source > src)
std::vector< std::string >	enabled_sources () const
	Entropy_Sources ()
	Entropy_Sources (const std::vector< std::string > &sources)
size_t	poll (RandomNumberGenerator &rng, size_t bits, std::chrono::milliseconds timeout)
size_t	poll_just (RandomNumberGenerator &rng, const std::string &src)
	~Entropy_Sources ()

Static Public Member Functions
static Entropy_Sources &	global_sources ()

Detailed Description

Definition at line 51 of file entropy_src.h.

Constructor & Destructor Documentation

Botan::Entropy_Sources::Entropy_Sources ( )

inline

Definition at line 69 of file entropy_src.h.

{}

Botan::Entropy_Sources::Entropy_Sources ( const std::vector< std::string > &  sources )

explicit

Definition at line 160 of file entropy_srcs.cpp.

References add_source(), and Botan::Entropy_Source::create().

   {
   for(auto&& src_name : sources)
      {
      add_source(Entropy_Source::create(src_name));
      }
   }

Botan::Entropy_Sources::~Entropy_Sources

(

)

Definition at line 168 of file entropy_srcs.cpp.

   {
   for(size_t i = 0; i != m_srcs.size(); ++i)
      {
      delete m_srcs[i];
      m_srcs[i] = nullptr;
      }
   m_srcs.clear();
   }

Member Function Documentation

void Botan::Entropy_Sources::add_source

(

std::unique_ptr< Entropy_Source >

src

)

Definition at line 108 of file entropy_srcs.cpp.

Referenced by Entropy_Sources().

   {
   if(src.get())
      {
      m_srcs.push_back(src.release());
      }
   }

std::vector< std::string > Botan::Entropy_Sources::enabled_sources

(

)

const

Definition at line 116 of file entropy_srcs.cpp.

   {
   std::vector<std::string> sources;
   for(size_t i = 0; i != m_srcs.size(); ++i)
      {
      sources.push_back(m_srcs[i]->name());
      }
   return sources;
   }

Entropy_Sources & Botan::Entropy_Sources::global_sources ( )

static

Definition at line 178 of file entropy_srcs.cpp.

   {
   static Entropy_Sources global_entropy_sources(BOTAN_ENTROPY_DEFAULT_SOURCES);

   return global_entropy_sources;
   }

size_t Botan::Entropy_Sources::poll	(	RandomNumberGenerator &	rng,
		size_t	bits,
		std::chrono::milliseconds	timeout
	)

Definition at line 126 of file entropy_srcs.cpp.

Referenced by Botan::RandomNumberGenerator::reseed().

   {
   typedef std::chrono::system_clock clock;

   auto deadline = clock::now() + timeout;

   size_t bits_collected = 0;

   for(Entropy_Source* src : m_srcs)
      {
      bits_collected += src->poll(rng);

      if (bits_collected >= poll_bits || clock::now() > deadline)
         break;
      }

   return bits_collected;
   }

size_t Botan::Entropy_Sources::poll_just	(	RandomNumberGenerator &	rng,
		const std::string &	src
	)

Poll just a single named source. Ordinally only used for testing

Definition at line 147 of file entropy_srcs.cpp.

   {
   for(size_t i = 0; i != m_srcs.size(); ++i)
      {
      if(m_srcs[i]->name() == the_src)
         {
         return m_srcs[i]->poll(rng);
         }
      }

   return 0;
   }

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The documentation for this class was generated from the following files:

• src/lib/entropy/entropy_src.h
• src/lib/entropy/entropy_srcs.cpp