Initial checkin1.5.6

1 files changed, 133 insertions, 0 deletions

diff --git a/src/get_enc.cpp b/src/get_enc.cpp
new file mode 100644
index 000000000..8d1369328
--- /dev/null
+++ b/src/get_enc.cpp
@@ -0,0 +1,133 @@
+/*************************************************
+* EMSA/EME/KDF/MGF Retrieval Source File         *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/lookup.h>
+#include <botan/parsing.h>
+#include <botan/emsa.h>
+#include <botan/eme.h>
+#include <botan/kdf.h>
+#include <botan/mgf1.h>
+#include <botan/util.h>
+
+namespace Botan {
+
+/*************************************************
+* Get an EMSA by name                            *
+*************************************************/
+EMSA* get_emsa(const std::string& algo_spec)
+   {
+   std::vector<std::string> name = parse_algorithm_name(algo_spec);
+   const std::string emsa_name = deref_alias(name[0]);
+
+   if(emsa_name == "Raw")
+      {
+      if(name.size() == 1)
+         return new EMSA_Raw;
+      }
+   else if(emsa_name == "EMSA1")
+      {
+      if(name.size() == 2)
+         return new EMSA1(name[1]);
+      }
+   else if(emsa_name == "EMSA2")
+      {
+      if(name.size() == 2)
+         return new EMSA2(name[1]);
+      }
+   else if(emsa_name == "EMSA3")
+      {
+      if(name.size() == 2)
+         return new EMSA3(name[1]);
+      }
+   else if(emsa_name == "EMSA4")
+      {
+      if(name.size() == 2)
+         return new EMSA4(name[1], "MGF1");
+      if(name.size() == 3)
+         return new EMSA4(name[1], name[2]);
+      if(name.size() == 4)
+         return new EMSA4(name[1], name[2], to_u32bit(name[3]));
+      }
+   else
+      throw Algorithm_Not_Found(algo_spec);
+
+   throw Invalid_Algorithm_Name(algo_spec);
+   }
+
+/*************************************************
+* Get an EME by name                             *
+*************************************************/
+EME* get_eme(const std::string& algo_spec)
+   {
+   std::vector<std::string> name = parse_algorithm_name(algo_spec);
+   const std::string eme_name = deref_alias(name[0]);
+
+   if(eme_name == "PKCS1v15")
+      {
+      if(name.size() == 1)
+         return new EME_PKCS1v15;
+      }
+   else if(eme_name == "EME1")
+      {
+      if(name.size() == 2)
+         return new EME1(name[1], "MGF1");
+      if(name.size() == 3)
+         return new EME1(name[1], name[2]);
+      }
+   else
+      throw Algorithm_Not_Found(algo_spec);
+
+   throw Invalid_Algorithm_Name(algo_spec);
+   }
+
+/*************************************************
+* Get an KDF by name                             *
+*************************************************/
+KDF* get_kdf(const std::string& algo_spec)
+   {
+   std::vector<std::string> name = parse_algorithm_name(algo_spec);
+   const std::string kdf_name = deref_alias(name[0]);
+
+   if(kdf_name == "KDF1")
+      {
+      if(name.size() == 2)
+         return new KDF1(name[1]);
+      }
+   else if(kdf_name == "KDF2")
+      {
+      if(name.size() == 2)
+         return new KDF2(name[1]);
+      }
+   else if(kdf_name == "X9.42-PRF")
+      {
+      if(name.size() == 2)
+         return new X942_PRF(name[1]);
+      }
+   else
+      throw Algorithm_Not_Found(algo_spec);
+
+   throw Invalid_Algorithm_Name(algo_spec);
+   }
+
+/*************************************************
+* Get a MGF by name                              *
+*************************************************/
+MGF* get_mgf(const std::string& algo_spec)
+   {
+   std::vector<std::string> name = parse_algorithm_name(algo_spec);
+   const std::string mgf_name = deref_alias(name[0]);
+
+   if(mgf_name == "MGF1")
+      {
+      if(name.size() == 2)
+         return new MGF1(name[1]);
+      }
+   else
+      throw Algorithm_Not_Found(algo_spec);
+
+   throw Invalid_Algorithm_Name(algo_spec);
+   }
+
+}