Remove algo factory, engines, global RNG, global state, etc.

Convert all uses of Algorithm_Factory and the engines to using Algo_Registry

The shared pool of entropy sources remains but is moved to EntropySource.
With that and few remaining initializations (default OIDs and aliases)
moved elsewhere, the global state is empty and init and shutdown are no-ops.
Remove almost all of the headers and code for handling the global
state, except LibraryInitializer which remains as a compatability stub.

Update seeding for blinding so only one hacky almost-global RNG
instance needs to be setup instead of across all pubkey uses (it uses
either the system RNG or an AutoSeeded_RNG if the system RNG is not
available).

1 files changed, 7 insertions, 2 deletions

diff --git a/src/lib/stream/stream_cipher.h b/src/lib/stream/stream_cipher.h
index 2ca92e467..9768aea70 100644
--- a/src/lib/stream/stream_cipher.h
+++ b/src/lib/stream/stream_cipher.h
@@ -8,6 +8,7 @@
 #ifndef BOTAN_STREAM_CIPHER_H__
 #define BOTAN_STREAM_CIPHER_H__
 
+#include <botan/transform.h>
 #include <botan/sym_algo.h>
 #include <botan/scan_name.h>
 
@@ -52,13 +53,17 @@ class BOTAN_DLL StreamCipher : public SymmetricAlgorithm
       * @param iv the initialization vector
       * @param iv_len the length of the IV in bytes
       */
-      virtual void set_iv(const byte iv[], size_t iv_len);
+      virtual void set_iv(const byte[], size_t iv_len)
+         {
+         if(iv_len)
+            throw Invalid_IV_Length(name(), iv_len);
+         }
 
       /**
       * @param iv_len the length of the IV in bytes
       * @return if the length is valid for this algorithm
       */
-      virtual bool valid_iv_length(size_t iv_len) const;
+      virtual bool valid_iv_length(size_t iv_len) const { return (iv_len == 0); }
 
       /**
       * Get a new object representing the same algorithm as *this