Add a simple but functioning implementation of Keccak. Only the

proposed SHA-3 parameter sets are supported.

1 files changed, 44 insertions, 0 deletions

diff --git a/src/hash/keccak/keccak.h b/src/hash/keccak/keccak.h
new file mode 100644
index 000000000..62269c9a1
--- /dev/null
+++ b/src/hash/keccak/keccak.h
@@ -0,0 +1,44 @@
+/*
+* Keccak
+* (C) 2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_KECCAK_H__
+#define BOTAN_KECCAK_H__
+
+#include <botan/hash.h>
+#include <botan/secmem.h>
+#include <string>
+
+namespace Botan {
+
+/**
+* Keccak[1600], a SHA-3 candidate
+*/
+class BOTAN_DLL Keccak_1600 : public HashFunction
+   {
+   public:
+      Keccak_1600(size_t output_bits = 512);
+
+      size_t hash_block_size() const { return bitrate / 8; }
+      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[]);
+
+      size_t output_bits, bitrate;
+      byte diversifier;
+      SecureVector<u64bit> S;
+      SecureVector<byte> buffer;
+      size_t buf_pos;
+   };
+
+}
+
+#endif