1 files changed, 50 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/hash/par_hash/par_hash.h b/comm/third_party/botan/src/lib/hash/par_hash/par_hash.h
new file mode 100644
index 0000000000..8942cfe4db
--- /dev/null
+++ b/comm/third_party/botan/src/lib/hash/par_hash/par_hash.h
@@ -0,0 +1,50 @@
+/*
+* Parallel Hash
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_PARALLEL_HASH_H_
+#define BOTAN_PARALLEL_HASH_H_
+
+#include <botan/hash.h>
+#include <vector>
+
+BOTAN_FUTURE_INTERNAL_HEADER(par_hash.h)
+
+namespace Botan {
+
+/**
+* Parallel Hashes
+*/
+class BOTAN_PUBLIC_API(2,0) Parallel final : public HashFunction
+   {
+   public:
+      void clear() override;
+      std::string name() const override;
+      HashFunction* clone() const override;
+      std::unique_ptr<HashFunction> copy_state() const override;
+
+      size_t output_length() const override;
+
+      /**
+      * @param hashes a set of hashes to compute in parallel
+      * Takes ownership of all pointers
+      */
+      explicit Parallel(std::vector<std::unique_ptr<HashFunction>>& hashes);
+
+      Parallel(const Parallel&) = delete;
+      Parallel& operator=(const Parallel&) = delete;
+   private:
+      Parallel() = delete;
+
+      void add_data(const uint8_t[], size_t) override;
+      void final_result(uint8_t[]) override;
+
+      std::vector<std::unique_ptr<HashFunction>> m_hashes;
+   };
+
+}
+
+#endif