Move rng.{cpp,h} from core to rng/ topdir

Add a new class AutoSeeded_RNG that is a RandomNumberGenerator that wraps
up the logic formerly in RandomNumberGenerator::make_rng. make_rng in
fact now just returns a new AutoSeeded_RNG object.

AutoSeeded_RNG is a bit more convenient because

- No need to use auto_ptr
- No need to dereference (same syntax everywhere - it's an underestimated
advantage imo)

Also move the code from timer/timer_base to timer/

1 files changed, 2 insertions, 3 deletions

diff --git a/doc/examples/encrypt.cpp b/doc/examples/encrypt.cpp
index 959461b63..8f61306be 100644
--- a/doc/examples/encrypt.cpp
+++ b/doc/examples/encrypt.cpp
@@ -119,12 +119,11 @@ int main(int argc, char* argv[])
       const u32bit key_len = max_keylength_of(algo);
       const u32bit iv_len = block_size_of(algo);
 
-      std::auto_ptr<RandomNumberGenerator> rng(
-         RandomNumberGenerator::make_rng());
+      AutoSeeded_RNG rng;
 
       std::auto_ptr<S2K> s2k(get_s2k("PBKDF2(SHA-1)"));
       s2k->set_iterations(8192);
-      s2k->new_random_salt(*rng, 8);
+      s2k->new_random_salt(rng, 8);
 
       SymmetricKey bc_key = s2k->derive_key(key_len, "BLK" + passphrase);
       InitializationVector iv = s2k->derive_key(iv_len, "IVL" + passphrase);