1 files changed, 37 insertions, 0 deletions
diff --git a/src/lib/checksum/adler32/adler32.h b/src/lib/checksum/adler32/adler32.h
new file mode 100644
index 000000000..dc2872ca1
--- /dev/null
+++ b/src/lib/checksum/adler32/adler32.h
@@ -0,0 +1,37 @@
+/*
+* Adler32
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_ADLER32_H__
+#define BOTAN_ADLER32_H__
+
+#include <botan/hash.h>
+
+namespace Botan {
+
+/**
+* The Adler32 checksum, used in zlib
+*/
+class BOTAN_DLL Adler32 : public HashFunction
+   {
+   public:
+      std::string name() const { return "Adler32"; }
+      size_t output_length() const { return 4; }
+      HashFunction* clone() const { return new Adler32; }
+
+      void clear() { S1 = 1; S2 = 0; }
+
+      Adler32() { clear(); }
+      ~Adler32() { clear(); }
+   private:
+      void add_data(const byte[], size_t);
+      void final_result(byte[]);
+      u16bit S1, S2;
+   };
+
+}
+
+#endif