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, 8 insertions, 1 deletions

diff --git a/src/tests/tests.h b/src/tests/tests.h
index 9f511c4fb..1af278cce 100644
--- a/src/tests/tests.h
+++ b/src/tests/tests.h
@@ -99,7 +99,7 @@ class Test
                else
                   {
                   Result r(result.who());
-                  r.test_note("Got expected failure " + result.result_string());
+                  r.test_note("Got expected failure");
                   return r;
                   }
                }
@@ -108,6 +108,13 @@ class Test
 
             void test_note(const std::string& note, const char* extra = nullptr);
 
+            template<typename Alloc>
+            void test_note(const std::string& who, const std::vector<uint8_t, Alloc>& vec)
+               {
+               const std::string hex = Botan::hex_encode(vec);
+               return test_note(who, hex.c_str());
+               }
+
             void note_missing(const std::string& thing);
 
             bool test_success(const std::string& note = "");