Add SipHash

1 files changed, 45 insertions, 0 deletions

diff --git a/src/lib/mac/siphash/siphash.h b/src/lib/mac/siphash/siphash.h
new file mode 100644
index 000000000..ec57864eb
--- /dev/null
+++ b/src/lib/mac/siphash/siphash.h
@@ -0,0 +1,45 @@
+/*
+* SipHash
+* (C) 2014,2015 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_SIPHASH_H__
+#define BOTAN_SIPHASH_H__
+
+#include <botan/mac.h>
+
+namespace Botan {
+
+class BOTAN_DLL SipHash : public MessageAuthenticationCode
+   {
+   public:
+      SipHash(size_t c = 2, size_t d = 4) : m_C(c), m_D(d) {}
+
+      void clear();
+      std::string name() const;
+
+      MessageAuthenticationCode* clone() const;
+
+      size_t output_length() const { return 8; }
+
+      Key_Length_Specification key_spec() const
+         {
+         return Key_Length_Specification(16);
+         }
+   private:
+      void add_data(const byte[], size_t);
+      void final_result(byte[]);
+      void key_schedule(const byte[], size_t);
+
+      const size_t m_C, m_D;
+      secure_vector<u64bit> m_V;
+      u64bit m_mbuf = 0;
+      size_t m_mbuf_pos = 0;
+      byte m_words = 0;
+   };
+
+}
+
+#endif