New reseed_with_sources call on RNGs

Provides an easier way for an application to configure a list of
entropy sources they'd like to use, or add a custom entropy source to
their seeding.

Exposes some toggles for the global/default entropy sources to build.h

Adds basic entropy tests which runs the polls and does sanity checking
on the results, including compression tests if available. These are
less useful for the CSPRNG outputs but a good check for the ones
producing plain ASCII like the /proc reader.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/entropy/proc_walk/proc_walk.cpp b/src/lib/entropy/proc_walk/proc_walk.cpp
index 3d63e5d5a..817aa80a5 100644
--- a/src/lib/entropy/proc_walk/proc_walk.cpp
+++ b/src/lib/entropy/proc_walk/proc_walk.cpp
@@ -113,7 +113,7 @@ int Directory_Walker::next_fd()
 void ProcWalking_EntropySource::poll(Entropy_Accumulator& accum)
    {
    const size_t MAX_FILES_READ_PER_POLL = 2048;
-   const double ENTROPY_ESTIMATE = 1.0 / (8*1024);
+   const double ENTROPY_ESTIMATE = 1.0 / 128;
 
    std::lock_guard<std::mutex> lock(m_mutex);