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, 3 insertions, 4 deletions

diff --git a/doc/examples/rsa_enc.cpp b/doc/examples/rsa_enc.cpp
index aebe42e72..4f37af6d6 100644
--- a/doc/examples/rsa_enc.cpp
+++ b/doc/examples/rsa_enc.cpp
@@ -73,8 +73,7 @@ int main(int argc, char* argv[])
          return 1;
          }
 
-      std::auto_ptr<RandomNumberGenerator> rng(
-         RandomNumberGenerator::make_rng());
+      AutoSeeded_RNG rng;
 
       std::auto_ptr<PK_Encryptor> encryptor(get_pk_encryptor(*rsakey,
                                                              "EME1(SHA-1)"));
@@ -90,7 +89,7 @@ int main(int argc, char* argv[])
          statistically indepedent. Practically speaking I don't think this is
          a problem.
       */
-      SymmetricKey masterkey(*rng,
+      SymmetricKey masterkey(rng,
                              std::min(32U, encryptor->maximum_input_size()));
 
       SymmetricKey cast_key = derive_key("CAST", masterkey, 16);
@@ -98,7 +97,7 @@ int main(int argc, char* argv[])
       SymmetricKey iv       = derive_key("IV",   masterkey, 8);
 
       SecureVector<byte> encrypted_key =
-         encryptor->encrypt(masterkey.bits_of(), *rng);
+         encryptor->encrypt(masterkey.bits_of(), rng);
 
       ciphertext << b64_encode(encrypted_key) << std::endl;