1 files changed, 124 insertions, 0 deletions
diff --git a/old/botan/src/filters/algo_filt.cpp b/old/botan/src/filters/algo_filt.cpp
new file mode 100644
index 0000000..23f7a20
--- /dev/null
+++ b/old/botan/src/filters/algo_filt.cpp
@@ -0,0 +1,124 @@
+/*
+* Filters
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/filters.h>
+#include <botan/libstate.h>
+#include <algorithm>
+
+namespace Botan {
+
+/*
+* StreamCipher_Filter Constructor
+*/
+StreamCipher_Filter::StreamCipher_Filter(const std::string& sc_name) :
+   buffer(DEFAULT_BUFFERSIZE)
+   {
+   Algorithm_Factory& af = global_state().algorithm_factory();
+   base_ptr = cipher = af.make_stream_cipher(sc_name);
+   }
+
+/*
+* StreamCipher_Filter Constructor
+*/
+StreamCipher_Filter::StreamCipher_Filter(StreamCipher* stream_cipher) :
+   buffer(DEFAULT_BUFFERSIZE)
+   {
+   base_ptr = cipher = stream_cipher;
+   }
+
+/*
+* StreamCipher_Filter Constructor
+*/
+StreamCipher_Filter::StreamCipher_Filter(const std::string& sc_name,
+                                         const SymmetricKey& key) :
+   buffer(DEFAULT_BUFFERSIZE)
+   {
+   Algorithm_Factory& af = global_state().algorithm_factory();
+   base_ptr = cipher = af.make_stream_cipher(sc_name);
+   cipher->set_key(key);
+   }
+
+/*
+* Set the IV of a stream cipher
+*/
+void StreamCipher_Filter::set_iv(const InitializationVector& iv)
+   {
+   cipher->resync(iv.begin(), iv.length());
+   }
+
+/*
+* Write data into a StreamCipher_Filter
+*/
+void StreamCipher_Filter::write(const byte input[], u32bit length)
+   {
+   while(length)
+      {
+      u32bit copied = std::min(length, buffer.size());
+      cipher->encrypt(input, buffer, copied);
+      send(buffer, copied);
+      input += copied;
+      length -= copied;
+      }
+   }
+
+/*
+* Hash_Filter Constructor
+*/
+Hash_Filter::Hash_Filter(const std::string& algo_spec,
+                         u32bit len) :
+   OUTPUT_LENGTH(len)
+   {
+   Algorithm_Factory& af = global_state().algorithm_factory();
+   hash = af.make_hash_function(algo_spec);
+   }
+
+/*
+* Complete a calculation by a Hash_Filter
+*/
+void Hash_Filter::end_msg()
+   {
+   SecureVector<byte> output = hash->final();
+   if(OUTPUT_LENGTH)
+      send(output, std::min(OUTPUT_LENGTH, output.size()));
+   else
+      send(output);
+   }
+
+/*
+* MAC_Filter Constructor
+*/
+MAC_Filter::MAC_Filter(const std::string& mac_name, u32bit len) :
+   OUTPUT_LENGTH(len)
+   {
+   Algorithm_Factory& af = global_state().algorithm_factory();
+   base_ptr = mac = af.make_mac(mac_name);
+   }
+
+/*
+* MAC_Filter Constructor
+*/
+MAC_Filter::MAC_Filter(const std::string& mac_name, const SymmetricKey& key,
+                       u32bit len) : OUTPUT_LENGTH(len)
+   {
+   Algorithm_Factory& af = global_state().algorithm_factory();
+   base_ptr = mac = af.make_mac(mac_name);
+   mac->set_key(key);
+   }
+
+/*
+* Complete a calculation by a MAC_Filter
+*/
+void MAC_Filter::end_msg()
+   {
+   SecureVector<byte> output = mac->final();
+   if(OUTPUT_LENGTH)
+      send(output, std::min(OUTPUT_LENGTH, output.size()));
+   else
+      send(output);
+   }
+
+}