1 files changed, 40 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/hash/checksum/adler32/adler32.h b/comm/third_party/botan/src/lib/hash/checksum/adler32/adler32.h
new file mode 100644
index 0000000000..cd84a7597e
--- /dev/null
+++ b/comm/third_party/botan/src/lib/hash/checksum/adler32/adler32.h
@@ -0,0 +1,40 @@
+/*
+* Adler32
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_ADLER32_H_
+#define BOTAN_ADLER32_H_
+
+#include <botan/hash.h>
+
+BOTAN_FUTURE_INTERNAL_HEADER(adler32.h)
+
+namespace Botan {
+
+/**
+* The Adler32 checksum, used in zlib
+*/
+class BOTAN_PUBLIC_API(2,0) Adler32 final : public HashFunction
+   {
+   public:
+      std::string name() const override { return "Adler32"; }
+      size_t output_length() const override { return 4; }
+      HashFunction* clone() const override { return new Adler32; }
+      std::unique_ptr<HashFunction> copy_state() const override;
+
+      void clear() override { m_S1 = 1; m_S2 = 0; }
+
+      Adler32() { clear(); }
+      ~Adler32() { clear(); }
+   private:
+      void add_data(const uint8_t[], size_t) override;
+      void final_result(uint8_t[]) override;
+      uint16_t m_S1, m_S2;
+   };
+
+}
+
+#endif