12732895979

Committed 12 Jan 2025 11:00AM UTC coverage: 91.237% (-0.003%) from 91.24%

Build # 12732895979

Build Type

push

github

Committed by

web-flow

Commit Message

Merge pull request #4525 from randombit/jack/entropy-is-optional

Let the entropy module be optional

Run Details

93458 of 102434 relevant lines covered (91.24%)

11406941.45 hits per line

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90.48

/src/lib/rng/rng.cpp

/*
* (C) 2016 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/rng.h>

#include <botan/internal/loadstor.h>

#if defined(BOTAN_HAS_ENTROPY_SOURCE)
   #include <botan/entropy_src.h>
#endif

#if defined(BOTAN_HAS_SYSTEM_RNG)
   #include <botan/system_rng.h>
#endif

#if defined(BOTAN_HAS_OS_UTILS)
   #include <botan/internal/os_utils.h>
#endif

#include <array>

namespace Botan {

void RandomNumberGenerator::randomize_with_ts_input(std::span<uint8_t> output) {
   if(this->accepts_input()) {
      std::array<uint8_t, 32> additional_input = {0};

#if defined(BOTAN_HAS_OS_UTILS)
      store_le(std::span{additional_input}.subspan<0, 8>(), OS::get_high_resolution_clock());
      store_le(std::span{additional_input}.subspan<8, 4>(), OS::get_process_id());
      constexpr size_t offset = 12;
#else
      constexpr size_t offset = 0;
#endif

#if defined(BOTAN_HAS_SYSTEM_RNG)
      system_rng().randomize(std::span{additional_input}.subspan<offset>());
#else
      BOTAN_UNUSED(offset);
#endif

      this->fill_bytes_with_input(output, additional_input);
   } else {
      this->fill_bytes_with_input(output, {});
   }
}

size_t RandomNumberGenerator::reseed(Entropy_Sources& srcs, size_t poll_bits, std::chrono::milliseconds poll_timeout) {
   if(this->accepts_input()) {
#if defined(BOTAN_HAS_ENTROPY_SOURCE)
      return srcs.poll(*this, poll_bits, poll_timeout);
#else
      BOTAN_UNUSED(srcs, poll_bits, poll_timeout);
#endif
   }

   return 0;
}

void RandomNumberGenerator::reseed_from_rng(RandomNumberGenerator& rng, size_t poll_bits) {
   if(this->accepts_input()) {
      this->add_entropy(rng.random_vec(poll_bits / 8));
   }
}

void Null_RNG::fill_bytes_with_input(std::span<uint8_t> output, std::span<const uint8_t> /* ignored */) {
   // throw if caller tries to obtain random bytes
   if(!output.empty()) {
      throw PRNG_Unseeded("Null_RNG called");
   }
}

}  // namespace Botan

1	/*
2	* (C) 2016 Jack Lloyd
3	*
4	* Botan is released under the Simplified BSD License (see license.txt)
5	*/
6
7	#include <botan/rng.h>
8
9	#include <botan/internal/loadstor.h>
10
11	#if defined(BOTAN_HAS_ENTROPY_SOURCE)
12	#include <botan/entropy_src.h>
13	#endif
14
15	#if defined(BOTAN_HAS_SYSTEM_RNG)
16	#include <botan/system_rng.h>
17	#endif
18
19	#if defined(BOTAN_HAS_OS_UTILS)
20	#include <botan/internal/os_utils.h>
21	#endif
22
23	#include <array>
24
25	namespace Botan {
26
27	void RandomNumberGenerator::randomize_with_ts_input(std::span<uint8_t> output) {	4,647✔
28	if(this->accepts_input()) {	4,647✔
29	std::array<uint8_t, 32> additional_input = {0};	4,647✔
30
31	#if defined(BOTAN_HAS_OS_UTILS)
32	store_le(std::span{additional_input}.subspan<0, 8>(), OS::get_high_resolution_clock());	4,647✔
33	store_le(std::span{additional_input}.subspan<8, 4>(), OS::get_process_id());	4,647✔
34	constexpr size_t offset = 12;	4,647✔
35	#else
36	constexpr size_t offset = 0;
37	#endif
38
39	#if defined(BOTAN_HAS_SYSTEM_RNG)
40	system_rng().randomize(std::span{additional_input}.subspan<offset>());	4,647✔
41	#else
42	BOTAN_UNUSED(offset);
43	#endif
44
45	this->fill_bytes_with_input(output, additional_input);	4,647✔
46	} else {
47	this->fill_bytes_with_input(output, {});	×
48	}
49	}	13,941✔
50
51	size_t RandomNumberGenerator::reseed(Entropy_Sources& srcs, size_t poll_bits, std::chrono::milliseconds poll_timeout) {	11✔
52	if(this->accepts_input()) {	11✔
53	#if defined(BOTAN_HAS_ENTROPY_SOURCE)
54	return srcs.poll(*this, poll_bits, poll_timeout);	10✔
55	#else
56	BOTAN_UNUSED(srcs, poll_bits, poll_timeout);
57	#endif
58	}
59
60	return 0;
61	}
62
63	void RandomNumberGenerator::reseed_from_rng(RandomNumberGenerator& rng, size_t poll_bits) {	195✔
64	if(this->accepts_input()) {	195✔
65	this->add_entropy(rng.random_vec(poll_bits / 8));	377✔
66	}
67	}	186✔
68
69	void Null_RNG::fill_bytes_with_input(std::span<uint8_t> output, std::span<const uint8_t> /* ignored */) {	10✔
70	// throw if caller tries to obtain random bytes
71	if(!output.empty()) {	10✔
72	throw PRNG_Unseeded("Null_RNG called");	10✔
73	}
74	}	×
75
76	} // namespace Botan

randombit / botan / 12732895979

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