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 ()=default
	Entropy_Sources (const Entropy_Sources &other)=delete
	Entropy_Sources (const std::vector< std::string > &sources)
	Entropy_Sources (Entropy_Sources &&other)=delete
Entropy_Sources &	operator= (const Entropy_Sources &other)=delete
size_t	poll (RandomNumberGenerator &rng, size_t bits, std::chrono::milliseconds timeout)
size_t	poll_just (RandomNumberGenerator &rng, std::string_view src)

Static Public Member Functions
static Entropy_Sources &	global_sources ()

Detailed Description

Definition at line 55 of file entropy_src.h.

Constructor & Destructor Documentation

Entropy_Sources() [1/4]

Botan::Entropy_Sources::Entropy_Sources ( )

default

Entropy_Sources() [2/4]

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

explicit

Definition at line 196 of file entropy_srcs.cpp.

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

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

Entropy_Sources() [3/4]

Botan::Entropy_Sources::Entropy_Sources ( const Entropy_Sources & other )

delete

Entropy_Sources() [4/4]

Botan::Entropy_Sources::Entropy_Sources ( Entropy_Sources && other )

delete

Member Function Documentation

add_source()

void Botan::Entropy_Sources::add_source

(

std::unique_ptr< Entropy_Source >

src

)

Definition at line 153 of file entropy_srcs.cpp.

                                                                  {
   if(src) {
      m_srcs.push_back(std::move(src));
   }
}

Referenced by Entropy_Sources().

enabled_sources()

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

(

)

const

Definition at line 159 of file entropy_srcs.cpp.

                                                            {
   std::vector<std::string> sources;
   sources.reserve(m_srcs.size());
   for(const auto& src : m_srcs) {
      sources.push_back(src->name());
   }
   return sources;
}

global_sources()

Entropy_Sources & Botan::Entropy_Sources::global_sources ( )

static

Definition at line 202 of file entropy_srcs.cpp.

                                                 {
   static Entropy_Sources global_entropy_sources(BOTAN_ENTROPY_DEFAULT_SOURCES);
 
   return global_entropy_sources;
}

References BOTAN_ENTROPY_DEFAULT_SOURCES.

operator=()

Entropy_Sources & Botan::Entropy_Sources::operator= ( const Entropy_Sources & other )

delete

poll()

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

Definition at line 168 of file entropy_srcs.cpp.

                                                                                                        {
   typedef std::chrono::system_clock clock;
 
   auto deadline = clock::now() + timeout;
 
   size_t bits_collected = 0;
 
   for(auto& src : m_srcs) {
      bits_collected += src->poll(rng);
 
      if(bits_collected >= poll_bits || clock::now() > deadline) {
         break;
      }
   }
 
   return bits_collected;
}

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

poll_just()

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

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

Definition at line 186 of file entropy_srcs.cpp.

                                                                                    {
   for(auto& src : m_srcs) {
      if(src->name() == the_src) {
         return src->poll(rng);
      }
   }
 
   return 0;
}

---

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

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