1 files changed, 37 insertions, 0 deletions
diff --git a/lib/checksum/crc32/crc32.h b/lib/checksum/crc32/crc32.h
new file mode 100644
index 000000000..dec3d0449
--- /dev/null
+++ b/lib/checksum/crc32/crc32.h
@@ -0,0 +1,37 @@
+/*
+* CRC32
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_CRC32_H__
+#define BOTAN_CRC32_H__
+
+#include <botan/hash.h>
+
+namespace Botan {
+
+/**
+* 32-bit cyclic redundancy check
+*/
+class BOTAN_DLL CRC32 : public HashFunction
+   {
+   public:
+      std::string name() const { return "CRC32"; }
+      size_t output_length() const { return 4; }
+      HashFunction* clone() const { return new CRC32; }
+
+      void clear() { crc = 0xFFFFFFFF; }
+
+      CRC32() { clear(); }
+      ~CRC32() { clear(); }
+   private:
+      void add_data(const byte[], size_t);
+      void final_result(byte[]);
+      u32bit crc;
+   };
+
+}
+
+#endif