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diff --git a/source4/heimdal/lib/des/imath/iprime.h b/source4/heimdal/lib/des/imath/iprime.h
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+++ b/source4/heimdal/lib/des/imath/iprime.h
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+/*
+  Name:     iprime.h
+  Purpose:  Pseudoprimality testing routines
+  Author:   M. J. Fromberger <http://www.dartmouth.edu/~sting/>
+  Info:     $Id: iprime.h,v 1.3 2006/10/21 16:32:30 lha Exp $
+
+  Copyright (C) 2002 Michael J. Fromberger, All Rights Reserved.
+
+  Permission is hereby granted, free of charge, to any person
+  obtaining a copy of this software and associated documentation files
+  (the "Software"), to deal in the Software without restriction,
+  including without limitation the rights to use, copy, modify, merge,
+  publish, distribute, sublicense, and/or sell copies of the Software,
+  and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+  NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+ */
+
+#ifndef IPRIME_H_
+#define IPRIME_H_
+
+#include "imath.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Test whether z is likely to be prime
+   MP_YES means it is probably prime
+   MP_NO  means it is definitely composite
+ */
+mp_result mp_int_is_prime(mp_int z);
+
+/* Find the first apparent prime in ascending order from z */
+mp_result mp_int_find_prime(mp_int z);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* IPRIME_H_ */