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).

5 files changed, 49 insertions, 15 deletions

diff --git a/src/lib/filters/aead_filt/aead_filt.h b/src/lib/filters/aead_filt.h
index a97b580bd..a97b580bd 100644
--- a/src/lib/filters/aead_filt/aead_filt.h
+++ b/src/lib/filters/aead_filt.h
diff --git a/src/lib/filters/aead_filt/info.txt b/src/lib/filters/aead_filt/info.txt
deleted file mode 100644
index 891f2c167..000000000
--- a/src/lib/filters/aead_filt/info.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-define AEAD_FILTER 20131128
-
-<requires>
-aead
-</requires>
diff --git a/src/lib/filters/algo_filt.cpp b/src/lib/filters/algo_filt.cpp
index 828f15155..c1f7b00e2 100644
--- a/src/lib/filters/algo_filt.cpp
+++ b/src/lib/filters/algo_filt.cpp
@@ -6,7 +6,7 @@
 */
 
 #include <botan/filters.h>
-#include <botan/algo_registry.h>
+#include <botan/internal/algo_registry.h>
 #include <algorithm>
 
 namespace Botan {
diff --git a/src/lib/filters/info.txt b/src/lib/filters/info.txt
index 7bb98a516..da6827833 100644
--- a/src/lib/filters/info.txt
+++ b/src/lib/filters/info.txt
@@ -8,6 +8,7 @@ comp_filter.cpp
 data_snk.cpp
 data_src.cpp
 filter.cpp
+key_filt.cpp
 out_buf.cpp
 pipe.cpp
 pipe_io.cpp
@@ -36,14 +37,6 @@ out_buf.h
 </header:internal>
 
 <requires>
-alloc
-asn1
-block
 compression
-hash
-libstate
-mac
-rng
-stream
-algo_base
+modes
 </requires>
diff --git a/src/lib/filters/key_filt.h b/src/lib/filters/key_filt.h
index c2a1fd92b..96b472b7e 100644
--- a/src/lib/filters/key_filt.h
+++ b/src/lib/filters/key_filt.h
@@ -57,6 +57,52 @@ class BOTAN_DLL Keyed_Filter : public Filter
          { return (length == 0); }
    };
 
+
+
+/*
+* Get a cipher object
+*/
+
+/**
+* Factory method for general symmetric cipher filters.
+* @param algo_spec the name of the desired cipher
+* @param key the key to be used for encryption/decryption performed by
+* the filter
+* @param iv the initialization vector to be used
+* @param direction determines whether the filter will be an encrypting
+* or decrypting filter
+* @return pointer to newly allocated encryption or decryption filter
+*/
+BOTAN_DLL Keyed_Filter* get_cipher(const std::string& algo_spec,
+                                   const SymmetricKey& key,
+                                   const InitializationVector& iv,
+                                   Cipher_Dir direction);
+
+/**
+* Factory method for general symmetric cipher filters.
+* @param algo_spec the name of the desired cipher
+* @param key the key to be used for encryption/decryption performed by
+* the filter
+* @param direction determines whether the filter will be an encrypting
+* or decrypting filter
+* @return pointer to the encryption or decryption filter
+*/
+BOTAN_DLL Keyed_Filter* get_cipher(const std::string& algo_spec,
+                                   const SymmetricKey& key,
+                                   Cipher_Dir direction);
+
+/**
+* Factory method for general symmetric cipher filters. No key will be
+* set in the filter.
+*
+* @param algo_spec the name of the desired cipher
+* @param direction determines whether the filter will be an encrypting or
+* decrypting filter
+* @return pointer to the encryption or decryption filter
+*/
+BOTAN_DLL Keyed_Filter* get_cipher(const std::string& algo_spec,
+                                   Cipher_Dir direction);
+
 }
 
 #endif