#include <es_capi.h>
Inheritance diagram for Botan::Win32_CAPI_EntropySource:
Public Member Functions | |
| std::string | name () const |
| void | poll (Entropy_Accumulator &accum) |
| Win32_CAPI_EntropySource (const std::string &provs="") | |
Static Public Member Functions | |
| static void | poll_available_sources (class Entropy_Accumulator &accum) |
Detailed Description
Constructor & Destructor Documentation
| Botan::Win32_CAPI_EntropySource::Win32_CAPI_EntropySource | ( | const std::string & | provs = "" | ) |
Win32_Capi_Entropysource Constructor
- Parameters:
-
provs list of providers, separated by ':'
Definition at line 79 of file es_capi.cpp.
References Botan::split_on().
{
std::vector<std::string> capi_provs = split_on(provs, ':');
for(size_t i = 0; i != capi_provs.size(); ++i)
{
if(capi_provs[i] == "RSA_FULL") prov_types.push_back(PROV_RSA_FULL);
if(capi_provs[i] == "INTEL_SEC") prov_types.push_back(PROV_INTEL_SEC);
if(capi_provs[i] == "FORTEZZA") prov_types.push_back(PROV_FORTEZZA);
if(capi_provs[i] == "RNG") prov_types.push_back(PROV_RNG);
}
if(prov_types.size() == 0)
prov_types.push_back(PROV_RSA_FULL);
}
Member Function Documentation
| std::string Botan::Win32_CAPI_EntropySource::name | ( | ) | const [inline, virtual] |
- Returns:
- name identifying this entropy source
Implements Botan::EntropySource.
Definition at line 22 of file es_capi.h.
{ return "Win32 CryptoGenRandom"; }
| void Botan::Win32_CAPI_EntropySource::poll | ( | Entropy_Accumulator & | accum | ) | [virtual] |
Perform an entropy gathering poll
- Parameters:
-
accum is an accumulator object that will be given entropy
Implements Botan::EntropySource.
Definition at line 58 of file es_capi.cpp.
References Botan::Entropy_Accumulator::add(), and Botan::Entropy_Accumulator::get_io_buffer().
{
secure_vector<byte>& io_buffer = accum.get_io_buffer(32);
for(size_t i = 0; i != prov_types.size(); ++i)
{
CSP_Handle csp(prov_types[i]);
size_t got = csp.gen_random(&io_buffer[0], io_buffer.size());
if(got)
{
accum.add(&io_buffer[0], io_buffer.size(), 6);
break;
}
}
}
| void Botan::EntropySource::poll_available_sources | ( | class Entropy_Accumulator & | accum | ) | [static, inherited] |
Definition at line 108 of file entropy_srcs.cpp.
References Botan::Entropy_Accumulator::polling_goal_achieved().
Referenced by Botan::HMAC_RNG::reseed().
{
static std::vector<std::unique_ptr<EntropySource>> g_sources(get_default_entropy_sources());
if(g_sources.empty())
throw std::runtime_error("No entropy sources enabled at build time, poll failed");
size_t poll_attempt = 0;
while(!accum.polling_goal_achieved() && poll_attempt < 16)
{
const size_t src_idx = poll_attempt % g_sources.size();
g_sources[src_idx]->poll(accum);
++poll_attempt;
}
}
The documentation for this class was generated from the following files:
- src/lib/entropy/cryptoapi_rng/es_capi.h
- src/lib/entropy/cryptoapi_rng/es_capi.cpp
