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diff --git a/ext/digest/rmd160/rmd160.h b/ext/digest/rmd160/rmd160.h
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+/* $NetBSD: rmd160.h,v 1.2 2000/07/07 10:47:06 ad Exp $ */
+/* $RoughId: rmd160.h,v 1.2 2001/07/13 19:49:10 knu Exp $ */
+/* $Id$ */
+
+/********************************************************************\
+ *
+ * FILE: rmd160.h
+ *
+ * CONTENTS: Header file for a sample C-implementation of the
+ * RIPEMD-160 hash-function.
+ * TARGET: any computer with an ANSI C compiler
+ *
+ * AUTHOR: Antoon Bosselaers, ESAT-COSIC
+ * DATE: 1 March 1996
+ * VERSION: 1.0
+ *
+ * Copyright (c) Katholieke Universiteit Leuven
+ * 1996, All Rights Reserved
+ *
+\********************************************************************/
+
+/*
+ * from OpenBSD: rmd160.h,v 1.4 1999/08/16 09:59:04 millert Exp
+ */
+
+#ifndef _RMD160_H_
+#define _RMD160_H_
+
+#include "defs.h"
+
+typedef struct {
+ uint32_t state[5]; /* state (ABCDE) */
+ uint32_t length[2]; /* number of bits */
+ uint8_t bbuffer[64]; /* overflow buffer */
+ uint32_t buflen; /* number of chars in bbuffer */
+} RMD160_CTX;
+
+__BEGIN_DECLS
+void RMD160_Init _((RMD160_CTX *));
+void RMD160_Transform _((uint32_t[5], const uint32_t[16]));
+void RMD160_Update _((RMD160_CTX *, const uint8_t *, size_t));
+void RMD160_Final _((uint8_t[20], RMD160_CTX *));
+int RMD160_Equal _((RMD160_CTX *, RMD160_CTX *));
+#ifndef _KERNEL
+char *RMD160_End _((RMD160_CTX *, char *));
+char *RMD160_File _((char *, char *));
+char *RMD160_Data _((const uint8_t *, size_t, char *));
+#endif /* _KERNEL */
+__END_DECLS
+
+#define RMD160_BLOCK_LENGTH 64
+#define RMD160_DIGEST_LENGTH 20
+#define RMD160_DIGEST_STRING_LENGTH (RMD160_DIGEST_LENGTH * 2 + 1)
+
+#endif /* !_RMD160_H_ */