1 files changed, 52 insertions, 0 deletions
diff --git a/lib/hash/skein/skein_512.h b/lib/hash/skein/skein_512.h
new file mode 100644
index 000000000..e0abc06ae
--- /dev/null
+++ b/lib/hash/skein/skein_512.h
@@ -0,0 +1,52 @@
+/*
+* The Skein-512 hash function
+* (C) 2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_SKEIN_512_H__
+#define BOTAN_SKEIN_512_H__
+
+#include <botan/secmem.h>
+#include <botan/hash.h>
+#include <string>
+
+namespace Botan {
+
+/**
+* Skein-512, a SHA-3 candidate
+*/
+class BOTAN_DLL Skein_512 : public HashFunction
+   {
+   public:
+      /**
+      * @param output_bits the output size of Skein in bits
+      * @param personalization is a string that will paramaterize the
+      * hash output
+      */
+      Skein_512(size_t output_bits = 512,
+                const std::string& personalization = "");
+
+      size_t hash_block_size() const { return 64; }
+      size_t output_length() const { return output_bits / 8; }
+
+      HashFunction* clone() const;
+      std::string name() const;
+      void clear();
+   private:
+      void add_data(const byte input[], size_t length);
+      void final_result(byte out[]);
+
+      std::string personalization;
+      size_t output_bits;
+
+      secure_vector<u64bit> H;
+      secure_vector<u64bit> T;
+      secure_vector<byte> buffer;
+      size_t buf_pos;
+   };
+
+}
+
+#endif