Botan  2.4.0
Crypto and TLS for C++11
Public Member Functions | Static Public Member Functions | List of all members
Botan::Entropy_Sources Class Referencefinal

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

Static Public Member Functions

static Entropy_Sourcesglobal_sources ()
 

Detailed Description

Definition at line 56 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 182 of file entropy_srcs.cpp.

References Botan::Entropy_Source::create().

183  {
184  for(auto&& src_name : sources)
185  {
187  }
188  }
void add_source(std::unique_ptr< Entropy_Source > src)
static std::unique_ptr< Entropy_Source > create(const std::string &type)

◆ 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 130 of file entropy_srcs.cpp.

131  {
132  if(src.get())
133  {
134  m_srcs.push_back(std::move(src));
135  }
136  }

◆ enabled_sources()

std::vector< std::string > Botan::Entropy_Sources::enabled_sources ( ) const

Definition at line 138 of file entropy_srcs.cpp.

139  {
140  std::vector<std::string> sources;
141  for(size_t i = 0; i != m_srcs.size(); ++i)
142  {
143  sources.push_back(m_srcs[i]->name());
144  }
145  return sources;
146  }

◆ global_sources()

Entropy_Sources & Botan::Entropy_Sources::global_sources ( )
static

Definition at line 190 of file entropy_srcs.cpp.

191  {
192  static Entropy_Sources global_entropy_sources(BOTAN_ENTROPY_DEFAULT_SOURCES);
193 
194  return global_entropy_sources;
195  }

◆ 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 148 of file entropy_srcs.cpp.

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

151  {
152  typedef std::chrono::system_clock clock;
153 
154  auto deadline = clock::now() + timeout;
155 
156  size_t bits_collected = 0;
157 
158  for(size_t i = 0; i != m_srcs.size(); ++i)
159  {
160  bits_collected += m_srcs[i]->poll(rng);
161 
162  if (bits_collected >= poll_bits || clock::now() > deadline)
163  break;
164  }
165 
166  return bits_collected;
167  }

◆ poll_just()

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 169 of file entropy_srcs.cpp.

170  {
171  for(size_t i = 0; i != m_srcs.size(); ++i)
172  {
173  if(m_srcs[i]->name() == the_src)
174  {
175  return m_srcs[i]->poll(rng);
176  }
177  }
178 
179  return 0;
180  }

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