1 files changed, 51 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/hash/keccak/keccak.h b/comm/third_party/botan/src/lib/hash/keccak/keccak.h
new file mode 100644
index 0000000000..083d7fc5a6
--- /dev/null
+++ b/comm/third_party/botan/src/lib/hash/keccak/keccak.h
@@ -0,0 +1,51 @@
+/*
+* Keccak
+* (C) 2010 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_KECCAK_H_
+#define BOTAN_KECCAK_H_
+
+#include <botan/hash.h>
+#include <botan/secmem.h>
+#include <string>
+
+namespace Botan {
+
+BOTAN_FUTURE_INTERNAL_HEADER(keccak.h)
+
+/**
+* Keccak[1600], a SHA-3 candidate
+*/
+class BOTAN_PUBLIC_API(2,0) Keccak_1600 final : public HashFunction
+   {
+   public:
+
+      /**
+      * @param output_bits the size of the hash output; must be one of
+      *                    224, 256, 384, or 512
+      */
+      explicit Keccak_1600(size_t output_bits = 512);
+
+      size_t hash_block_size() const override { return m_bitrate / 8; }
+      size_t output_length() const override { return m_output_bits / 8; }
+
+      HashFunction* clone() const override;
+      std::unique_ptr<HashFunction> copy_state() const override;
+      std::string name() const override;
+      void clear() override;
+
+   private:
+      void add_data(const uint8_t input[], size_t length) override;
+      void final_result(uint8_t out[]) override;
+
+      size_t m_output_bits, m_bitrate;
+      secure_vector<uint64_t> m_S;
+      size_t m_S_pos;
+   };
+
+}
+
+#endif