1 files changed, 102 insertions, 0 deletions
diff --git a/src/par_hash.cpp b/src/par_hash.cpp
new file mode 100644
index 000000000..18a7b3a0e
--- /dev/null
+++ b/src/par_hash.cpp
@@ -0,0 +1,102 @@
+/*************************************************
+* Parallel Source File                           *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/par_hash.h>
+#include <botan/lookup.h>
+
+namespace Botan {
+
+namespace {
+
+/*************************************************
+* Return the sum of the hash sizes               *
+*************************************************/
+u32bit sum_of_hash_lengths(const std::vector<std::string>& names)
+   {
+   u32bit sum = 0;
+   for(u32bit j = 0; j != names.size(); ++j)
+      sum += output_length_of(names[j]);
+   return sum;
+   }
+
+}
+
+/*************************************************
+* Update the hash                                *
+*************************************************/
+void Parallel::add_data(const byte input[], u32bit length)
+   {
+   for(u32bit j = 0; j != hashes.size(); ++j)
+      hashes[j]->update(input, length);
+   }
+
+/*************************************************
+* Finalize the hash                              *
+*************************************************/
+void Parallel::final_result(byte hash[])
+   {
+   u32bit offset = 0;
+   for(u32bit j = 0; j != hashes.size(); ++j)
+      {
+      hashes[j]->final(hash + offset);
+      offset += hashes[j]->OUTPUT_LENGTH;
+      }
+   }
+
+/*************************************************
+* Return the name of this type                   *
+*************************************************/
+std::string Parallel::name() const
+   {
+   std::string hash_names;
+   for(u32bit j = 0; j != hashes.size(); ++j)
+      {
+      if(j)
+         hash_names += ',';
+      hash_names += hashes[j]->name();
+      }
+   return "Parallel(" + hash_names + ")";
+   }
+
+/*************************************************
+* Return a clone of this object                  *
+*************************************************/
+HashFunction* Parallel::clone() const
+   {
+   std::vector<std::string> names;
+   for(u32bit j = 0; j != hashes.size(); ++j)
+      names.push_back(hashes[j]->name());
+   return new Parallel(names);
+   }
+
+/*************************************************
+* Clear memory of sensitive data                 *
+*************************************************/
+void Parallel::clear() throw()
+   {
+   for(u32bit j = 0; j != hashes.size(); ++j)
+      hashes[j]->clear();
+   }
+
+/*************************************************
+* Parallel Constructor                           *
+*************************************************/
+Parallel::Parallel(const std::vector<std::string>& names) :
+   HashFunction(sum_of_hash_lengths(names))
+   {
+   for(u32bit j = 0; j != names.size(); ++j)
+      hashes.push_back(get_hash(names[j]));
+   }
+
+/*************************************************
+* Parallel Destructor                            *
+*************************************************/
+Parallel::~Parallel()
+   {
+   for(u32bit j = 0; j != hashes.size(); ++j)
+      delete hashes[j];
+   }
+
+}