Botan  1.10.9
Public Member Functions | List of all members
Botan::Win32_CAPI_EntropySource Class Reference

#include <es_capi.h>

Inheritance diagram for Botan::Win32_CAPI_EntropySource:
Botan::EntropySource

Public Member Functions

std::string name () const
 
void poll (Entropy_Accumulator &accum)
 
 Win32_CAPI_EntropySource (const std::string &provs="")
 

Detailed Description

Win32 CAPI Entropy Source

Definition at line 19 of file es_capi.h.

Constructor & Destructor Documentation

Botan::Win32_CAPI_EntropySource::Win32_CAPI_EntropySource ( const std::string &  provs = "")

Win32_Capi_Entropysource Constructor

Parameters
provslist of providers, separated by ':'

Definition at line 77 of file es_capi.cpp.

References Botan::split_on().

78  {
79  std::vector<std::string> capi_provs = split_on(provs, ':');
80 
81  for(size_t i = 0; i != capi_provs.size(); ++i)
82  {
83  if(capi_provs[i] == "RSA_FULL") prov_types.push_back(PROV_RSA_FULL);
84  if(capi_provs[i] == "INTEL_SEC") prov_types.push_back(PROV_INTEL_SEC);
85  if(capi_provs[i] == "FORTEZZA") prov_types.push_back(PROV_FORTEZZA);
86  if(capi_provs[i] == "RNG") prov_types.push_back(PROV_RNG);
87  }
88 
89  if(prov_types.size() == 0)
90  prov_types.push_back(PROV_RSA_FULL);
91  }
std::vector< std::string > split_on(const std::string &str, char delim)
Definition: parsing.cpp:152

Member Function Documentation

std::string Botan::Win32_CAPI_EntropySource::name ( ) const
inlinevirtual
Returns
name identifying this entropy source

Implements Botan::EntropySource.

Definition at line 22 of file es_capi.h.

22 { return "Win32 CryptoGenRandom"; }
void Botan::Win32_CAPI_EntropySource::poll ( Entropy_Accumulator accum)
virtual

Perform an entropy gathering poll

Parameters
accumis an accumulator object that will be given entropy

Implements Botan::EntropySource.

Definition at line 56 of file es_capi.cpp.

References Botan::Entropy_Accumulator::add(), Botan::Entropy_Accumulator::get_io_buffer(), and Botan::MemoryRegion< T >::size().

57  {
58  MemoryRegion<byte>& io_buffer = accum.get_io_buffer(32);
59 
60  for(size_t i = 0; i != prov_types.size(); ++i)
61  {
62  CSP_Handle csp(prov_types[i]);
63 
64  size_t got = csp.gen_random(&io_buffer[0], io_buffer.size());
65 
66  if(got)
67  {
68  accum.add(&io_buffer[0], io_buffer.size(), 6);
69  break;
70  }
71  }
72  }

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