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diff --git a/crc32.h b/crc32.h
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+/*
+
+crc32.h
+
+Author: Tatu Ylonen <ylo@cs.hut.fi>
+
+Copyright (c) 1992 Tatu Ylonen, Espoo, Finland
+                   All rights reserved
+
+Created: Tue Feb 11 14:37:27 1992 ylo
+
+Functions for computing 32-bit CRC.
+
+*/
+
+/* RCSID("$Id: crc32.h,v 1.1 1999/10/27 03:42:44 damien Exp $"); */
+
+#ifndef CRC32_H
+#define CRC32_H
+
+/* This computes a 32 bit CRC of the data in the buffer, and returns the
+   CRC.  The polynomial used is 0xedb88320. */
+unsigned int crc32(const unsigned char *buf, unsigned int len);
+
+#endif /* CRC32_H */