diff options
Diffstat (limited to 'src/lib/rng/rng.cpp')
| -rw-r--r-- | src/lib/rng/rng.cpp | 41 |
1 files changed, 29 insertions, 12 deletions
diff --git a/src/lib/rng/rng.cpp b/src/lib/rng/rng.cpp index 2cf3b7b81..2947ac629 100644 --- a/src/lib/rng/rng.cpp +++ b/src/lib/rng/rng.cpp @@ -17,15 +17,22 @@ namespace Botan { void RandomNumberGenerator::randomize_with_ts_input(uint8_t output[], size_t output_len) { - /* - Form additional input which is provided to the PRNG implementation - to paramaterize the KDF output. - */ - uint8_t additional_input[16] = { 0 }; - store_le(OS::get_system_timestamp_ns(), additional_input); - store_le(OS::get_high_resolution_clock(), additional_input + 8); + if(this->accepts_input()) + { + /* + Form additional input which is provided to the PRNG implementation + to paramaterize the KDF output. + */ + uint8_t additional_input[16] = { 0 }; + store_le(OS::get_system_timestamp_ns(), additional_input); + store_le(OS::get_high_resolution_clock(), additional_input + 8); - randomize_with_input(output, output_len, additional_input, sizeof(additional_input)); + this->randomize_with_input(output, output_len, additional_input, sizeof(additional_input)); + } + else + { + this->randomize(output, output_len); + } } void RandomNumberGenerator::randomize_with_input(uint8_t output[], size_t output_len, @@ -39,14 +46,24 @@ size_t RandomNumberGenerator::reseed(Entropy_Sources& srcs, size_t poll_bits, std::chrono::milliseconds poll_timeout) { - return srcs.poll(*this, poll_bits, poll_timeout); + if(this->accepts_input()) + { + return srcs.poll(*this, poll_bits, poll_timeout); + } + else + { + return 0; + } } void RandomNumberGenerator::reseed_from_rng(RandomNumberGenerator& rng, size_t poll_bits) { - secure_vector<uint8_t> buf(poll_bits / 8); - rng.randomize(buf.data(), buf.size()); - this->add_entropy(buf.data(), buf.size()); + if(this->accepts_input()) + { + secure_vector<uint8_t> buf(poll_bits / 8); + rng.randomize(buf.data(), buf.size()); + this->add_entropy(buf.data(), buf.size()); + } } RandomNumberGenerator* RandomNumberGenerator::make_rng() |