Coverage Report

Created: 2020-05-23 13:54

/src/botan/src/lib/rng/auto_rng/auto_rng.cpp
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/*
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* (C) 2016 Jack Lloyd
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*
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* Botan is released under the Simplified BSD License (see license.txt)
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*/
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#include <botan/auto_rng.h>
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#include <botan/entropy_src.h>
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#include <botan/hmac_drbg.h>
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#if defined(BOTAN_HAS_SYSTEM_RNG)
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  #include <botan/system_rng.h>
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#endif
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#if !defined(BOTAN_AUTO_RNG_HMAC)
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#error "No hash function defined for AutoSeeded_RNG in build.h (try enabling sha2_32)"
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#endif
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namespace Botan {
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AutoSeeded_RNG::~AutoSeeded_RNG()
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   {
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   // for unique_ptr
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   }
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AutoSeeded_RNG::AutoSeeded_RNG(RandomNumberGenerator& underlying_rng,
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                               size_t reseed_interval)
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   {
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   m_rng.reset(new HMAC_DRBG(MessageAuthenticationCode::create_or_throw(BOTAN_AUTO_RNG_HMAC),
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                             underlying_rng,
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                             reseed_interval));
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   force_reseed();
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   }
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AutoSeeded_RNG::AutoSeeded_RNG(Entropy_Sources& entropy_sources,
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                               size_t reseed_interval)
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   {
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   m_rng.reset(new HMAC_DRBG(MessageAuthenticationCode::create_or_throw(BOTAN_AUTO_RNG_HMAC),
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                             entropy_sources,
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                             reseed_interval));
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   force_reseed();
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   }
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AutoSeeded_RNG::AutoSeeded_RNG(RandomNumberGenerator& underlying_rng,
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                               Entropy_Sources& entropy_sources,
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                               size_t reseed_interval)
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   {
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   m_rng.reset(new HMAC_DRBG(
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                  MessageAuthenticationCode::create_or_throw(BOTAN_AUTO_RNG_HMAC),
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                  underlying_rng, entropy_sources, reseed_interval));
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   force_reseed();
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   }
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AutoSeeded_RNG::AutoSeeded_RNG(size_t reseed_interval) :
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#if defined(BOTAN_HAS_SYSTEM_RNG)
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   AutoSeeded_RNG(system_rng(), reseed_interval)
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#else
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   AutoSeeded_RNG(Entropy_Sources::global_sources(), reseed_interval)
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#endif
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   {
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   }
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void AutoSeeded_RNG::force_reseed()
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   {
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   m_rng->force_reseed();
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   m_rng->next_byte();
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   if(!m_rng->is_seeded())
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      {
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      throw Internal_Error("AutoSeeded_RNG reseeding failed");
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      }
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   }
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bool AutoSeeded_RNG::is_seeded() const
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   {
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   return m_rng->is_seeded();
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   }
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void AutoSeeded_RNG::clear()
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   {
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   m_rng->clear();
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   }
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std::string AutoSeeded_RNG::name() const
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   {
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   return m_rng->name();
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   }
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void AutoSeeded_RNG::add_entropy(const uint8_t in[], size_t len)
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   {
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   m_rng->add_entropy(in, len);
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   }
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size_t AutoSeeded_RNG::reseed(Entropy_Sources& srcs,
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                              size_t poll_bits,
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                              std::chrono::milliseconds poll_timeout)
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   {
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   return m_rng->reseed(srcs, poll_bits, poll_timeout);
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   }
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void AutoSeeded_RNG::randomize(uint8_t output[], size_t output_len)
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   {
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   m_rng->randomize_with_ts_input(output, output_len);
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   }
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void AutoSeeded_RNG::randomize_with_input(uint8_t output[], size_t output_len,
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                                          const uint8_t ad[], size_t ad_len)
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   {
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   m_rng->randomize_with_input(output, output_len, ad, ad_len);
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   }
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}