1 files changed, 136 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/hash/sha3/sha3.h b/comm/third_party/botan/src/lib/hash/sha3/sha3.h
new file mode 100644
index 0000000000..e290e60a20
--- /dev/null
+++ b/comm/third_party/botan/src/lib/hash/sha3/sha3.h
@@ -0,0 +1,136 @@
+/*
+* SHA-3
+* (C) 2010,2016 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_SHA3_H_
+#define BOTAN_SHA3_H_
+
+#include <botan/hash.h>
+#include <botan/secmem.h>
+#include <string>
+
+BOTAN_FUTURE_INTERNAL_HEADER(sha3.h)
+
+namespace Botan {
+
+/**
+* SHA-3
+*/
+class BOTAN_PUBLIC_API(2,0) SHA_3 : public HashFunction
+   {
+   public:
+
+      /**
+      * @param output_bits the size of the hash output; must be one of
+      *                    224, 256, 384, or 512
+      */
+      explicit SHA_3(size_t output_bits);
+
+      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;
+      std::string provider() const override;
+
+      // Static functions for internal usage
+
+      /**
+      * Absorb data into the provided state
+      * @param bitrate the bitrate to absorb into the sponge
+      * @param S the sponge state
+      * @param S_pos where to begin absorbing into S
+      * @param input the input data
+      * @param length size of input in bytes
+      */
+      static size_t absorb(size_t bitrate,
+                           secure_vector<uint64_t>& S, size_t S_pos,
+                           const uint8_t input[], size_t length);
+
+      /**
+      * Add final padding and permute. The padding is assumed to be
+      * init_pad || 00... || fini_pad
+      *
+      * @param bitrate the bitrate to absorb into the sponge
+      * @param S the sponge state
+      * @param S_pos where to begin absorbing into S
+      * @param init_pad the leading pad bits
+      * @param fini_pad the final pad bits
+      */
+      static void finish(size_t bitrate,
+                         secure_vector<uint64_t>& S, size_t S_pos,
+                         uint8_t init_pad, uint8_t fini_pad);
+
+      /**
+      * Expand from provided state
+      * @param bitrate sponge parameter
+      * @param S the state
+      * @param output the output buffer
+      * @param output_length the size of output in bytes
+      */
+      static void expand(size_t bitrate,
+                         secure_vector<uint64_t>& S,
+                         uint8_t output[], size_t output_length);
+
+      /**
+      * The bare Keccak-1600 permutation
+      */
+      static void permute(uint64_t A[25]);
+
+   private:
+      void add_data(const uint8_t input[], size_t length) override;
+      void final_result(uint8_t out[]) override;
+
+#if defined(BOTAN_HAS_SHA3_BMI2)
+      static void permute_bmi2(uint64_t A[25]);
+#endif
+
+      size_t m_output_bits, m_bitrate;
+      secure_vector<uint64_t> m_S;
+      size_t m_S_pos;
+   };
+
+/**
+* SHA-3-224
+*/
+class BOTAN_PUBLIC_API(2,0) SHA_3_224 final : public SHA_3
+   {
+   public:
+      SHA_3_224() : SHA_3(224) {}
+   };
+
+/**
+* SHA-3-256
+*/
+class BOTAN_PUBLIC_API(2,0) SHA_3_256 final : public SHA_3
+   {
+   public:
+      SHA_3_256() : SHA_3(256) {}
+   };
+
+/**
+* SHA-3-384
+*/
+class BOTAN_PUBLIC_API(2,0) SHA_3_384 final : public SHA_3
+   {
+   public:
+      SHA_3_384() : SHA_3(384) {}
+   };
+
+/**
+* SHA-3-512
+*/
+class BOTAN_PUBLIC_API(2,0) SHA_3_512 final : public SHA_3
+   {
+   public:
+      SHA_3_512() : SHA_3(512) {}
+   };
+
+}
+
+#endif