1 files changed, 74 insertions, 0 deletions
diff --git a/botan/src/filters/basefilt.cpp b/botan/src/filters/basefilt.cpp
new file mode 100644
index 0000000..02dbd8a
--- /dev/null
+++ b/botan/src/filters/basefilt.cpp
@@ -0,0 +1,74 @@
+/*
+* Basic Filters
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/basefilt.h>
+
+namespace Botan {
+
+/*
+* Chain Constructor
+*/
+Chain::Chain(Filter* f1, Filter* f2, Filter* f3, Filter* f4)
+   {
+   if(f1) { attach(f1); incr_owns(); }
+   if(f2) { attach(f2); incr_owns(); }
+   if(f3) { attach(f3); incr_owns(); }
+   if(f4) { attach(f4); incr_owns(); }
+   }
+
+/*
+* Chain Constructor
+*/
+Chain::Chain(Filter* filters[], u32bit count)
+   {
+   for(u32bit j = 0; j != count; ++j)
+      if(filters[j])
+         {
+         attach(filters[j]);
+         incr_owns();
+         }
+   }
+
+/*
+* Fork Constructor
+*/
+Fork::Fork(Filter* f1, Filter* f2, Filter* f3, Filter* f4)
+   {
+   Filter* filters[4] = { f1, f2, f3, f4 };
+   set_next(filters, 4);
+   }
+
+/*
+* Fork Constructor
+*/
+Fork::Fork(Filter* filters[], u32bit count)
+   {
+   set_next(filters, count);
+   }
+
+/*
+* Set the algorithm key
+*/
+void Keyed_Filter::set_key(const SymmetricKey& key)
+   {
+   if(base_ptr)
+      base_ptr->set_key(key);
+   else
+      throw Invalid_State("Keyed_Filter::set_key: No base algorithm set");
+   }
+
+/*
+* Check if a keylength is valid
+*/
+bool Keyed_Filter::valid_keylength(u32bit n) const
+   {
+   if(base_ptr)
+      return base_ptr->valid_keylength(n);
+   throw Invalid_State("Keyed_Filter::valid_keylength: No base algorithm set");
+   }
+
+}