Move most of the remaining libstate code to pk_engine.cpp, move engines

back to the toplevel since most othe dependencies have been removed now
(except get_cipher which still needs changes)

1 files changed, 194 insertions, 0 deletions

diff --git a/src/engine/def_engine/def_mode.cpp b/src/engine/def_engine/def_mode.cpp
new file mode 100644
index 000000000..7933fbb84
--- /dev/null
+++ b/src/engine/def_engine/def_mode.cpp
@@ -0,0 +1,194 @@
+/*************************************************
+* Default Engine Source File                     *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/def_eng.h>
+#include <botan/parsing.h>
+#include <botan/filters.h>
+#include <botan/libstate.h>
+#include <botan/mode_pad.h>
+#include <memory>
+
+#if defined(BOTAN_HAS_ECB)
+  #include <botan/ecb.h>
+#endif
+
+#if defined(BOTAN_HAS_CBC)
+  #include <botan/cbc.h>
+#endif
+
+#if defined(BOTAN_HAS_CTS)
+  #include <botan/cts.h>
+#endif
+
+#if defined(BOTAN_HAS_CFB)
+  #include <botan/cfb.h>
+#endif
+
+#if defined(BOTAN_HAS_OFB)
+  #include <botan/ofb.h>
+#endif
+
+#if defined(BOTAN_HAS_CTR)
+  #include <botan/ctr.h>
+#endif
+
+#if defined(BOTAN_HAS_EAX)
+  #include <botan/eax.h>
+#endif
+
+namespace Botan {
+
+namespace {
+
+/**
+* Get a block cipher padding method by name
+*/
+BlockCipherModePaddingMethod* get_bc_pad(const std::string& algo_spec)
+   {
+   SCAN_Name request(algo_spec);
+
+#if defined(BOTAN_HAS_CIPHER_MODE_PADDING)
+   if(request.algo_name() == "PKCS7")
+      return new PKCS7_Padding;
+
+   if(request.algo_name() == "OneAndZeros")
+      return new OneAndZeros_Padding;
+
+   if(request.algo_name() == "X9.23")
+      return new ANSI_X923_Padding;
+
+   if(request.algo_name() == "NoPadding")
+      return new Null_Padding;
+#endif
+
+   throw Algorithm_Not_Found(algo_spec);
+   }
+
+}
+
+/*************************************************
+* Get a cipher object                            *
+*************************************************/
+Keyed_Filter* Default_Engine::get_cipher(const std::string& algo_spec,
+                                         Cipher_Dir direction)
+   {
+   std::vector<std::string> algo_parts = split_on(algo_spec, '/');
+   if(algo_parts.empty())
+      throw Invalid_Algorithm_Name(algo_spec);
+
+   const std::string cipher_name = algo_parts[0];
+
+   Algorithm_Factory& af = global_state().algo_factory();
+
+   // check if it is a stream cipher first (easy case)
+   const StreamCipher* stream_cipher = af.prototype_stream_cipher(cipher_name);
+   if(stream_cipher)
+      return new StreamCipher_Filter(stream_cipher->clone());
+
+   const BlockCipher* block_cipher = af.prototype_block_cipher(cipher_name);
+   if(!block_cipher)
+      return 0;
+
+   if(algo_parts.size() != 2 && algo_parts.size() != 3)
+      return 0;
+
+   std::string mode = algo_parts[1];
+   u32bit bits = 0;
+
+   if(mode.find("CFB") != std::string::npos ||
+      mode.find("EAX") != std::string::npos)
+      {
+      std::vector<std::string> algo_info = parse_algorithm_name(mode);
+      mode = algo_info[0];
+      if(algo_info.size() == 1)
+         bits = 8*block_cipher->BLOCK_SIZE;
+      else if(algo_info.size() == 2)
+         bits = to_u32bit(algo_info[1]);
+      else
+         throw Invalid_Algorithm_Name(algo_spec);
+      }
+
+   std::string padding;
+   if(algo_parts.size() == 3)
+      padding = algo_parts[2];
+   else
+      padding = (mode == "CBC") ? "PKCS7" : "NoPadding";
+
+   if(mode == "ECB" && padding == "CTS")
+      return 0;
+   else if((mode != "CBC" && mode != "ECB") && padding != "NoPadding")
+      throw Invalid_Algorithm_Name(algo_spec);
+
+#if defined(BOTAN_HAS_OFB)
+   if(mode == "OFB")
+      return new OFB(block_cipher->clone());
+#endif
+
+#if defined(BOTAN_HAS_CTR)
+   if(mode == "CTR-BE")
+      return new CTR_BE(block_cipher->clone());
+#endif
+
+#if defined(BOTAN_HAS_ECB)
+   if(mode == "ECB")
+      {
+      if(direction == ENCRYPTION)
+         return new ECB_Encryption(block_cipher->clone(), get_bc_pad(padding));
+      else
+         return new ECB_Decryption(block_cipher->clone(), get_bc_pad(padding));
+      }
+#endif
+
+#if defined(BOTAN_HAS_CFB)
+   if(mode == "CFB")
+      {
+      if(direction == ENCRYPTION)
+         return new CFB_Encryption(block_cipher->clone(), bits);
+      else
+         return new CFB_Decryption(block_cipher->clone(), bits);
+      }
+#endif
+
+   if(mode == "CBC")
+      {
+      if(padding == "CTS")
+         {
+#if defined(BOTAN_HAS_CTS)
+         if(direction == ENCRYPTION)
+            return new CTS_Encryption(block_cipher->clone());
+         else
+            return new CTS_Decryption(block_cipher->clone());
+#else
+         return 0;
+#endif
+         }
+
+#if defined(BOTAN_HAS_CBC)
+      if(direction == ENCRYPTION)
+         return new CBC_Encryption(block_cipher->clone(),
+                                   get_bc_pad(padding));
+      else
+         return new CBC_Decryption(block_cipher->clone(),
+                                   get_bc_pad(padding));
+#else
+      return 0;
+#endif
+      }
+
+#if defined(BOTAN_HAS_EAX)
+   if(mode == "EAX")
+      {
+      if(direction == ENCRYPTION)
+         return new EAX_Encryption(block_cipher->clone(), bits);
+      else
+         return new EAX_Decryption(block_cipher->clone(), bits);
+      }
+#endif
+
+   throw Algorithm_Not_Found("get_mode: " + cipher_name + "/" +
+                             mode + "/" + padding);
+   }
+
+}