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//==========================================================================
//
//      ./lib/current/include/keytools.h
//
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
// for more details.
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// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
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// in accordance with section (3) of the GNU General Public License.
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// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//####UCDSNMPCOPYRIGHTBEGIN####
//
// -------------------------------------------
//
// Portions of this software may have been derived from the UCD-SNMP
// project,  <http://ucd-snmp.ucdavis.edu/>  from the University of
// California at Davis, which was originally based on the Carnegie Mellon
// University SNMP implementation.  Portions of this software are therefore
// covered by the appropriate copyright disclaimers included herein.
//
// The release used was version 4.1.2 of May 2000.  "ucd-snmp-4.1.2"
// -------------------------------------------
//
//####UCDSNMPCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    hmt
// Contributors: hmt
// Date:         2000-05-30
// Purpose:      Port of UCD-SNMP distribution to eCos.
// Description:  
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================
/********************************************************************
       Copyright 1989, 1991, 1992 by Carnegie Mellon University
 
			  Derivative Work -
Copyright 1996, 1998, 1999, 2000 The Regents of the University of California
 
			 All Rights Reserved
 
Permission to use, copy, modify and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appears in all copies and
that both that copyright notice and this permission notice appear in
supporting documentation, and that the name of CMU and The Regents of
the University of California not be used in advertising or publicity
pertaining to distribution of the software without specific written
permission.
 
CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL CMU OR
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,
INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*********************************************************************/
/*
 * keytools.h
 */
 
#ifndef _KEYTOOLS_H
#define _KEYTOOLS_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
 
#define USM_LENGTH_EXPANDED_PASSPHRASE	(1024 * 1024)	/* 1Meg. */
 
#define USM_LENGTH_KU_HASHBLOCK		64		/* In bytes. */
 
#define USM_LENGTH_P_MIN		8		/* In characters. */
	/* Recommended practice given in <draft-ietf-snmpv3-usm-v2-02.txt>,
	 * Section 11.2 "Defining Users".  Move into cmdline app argument
	 * parsing, and out of the internal routine?  XXX
	 */
 
/*
 * Prototypes.h
 */
int	generate_Ku (	oid	*hashtype,	u_int  hashtype_len,
				u_char	*P,		size_t  pplen,
				u_char	*Ku,		size_t *kulen);
 
int	generate_kul (	oid	*hashtype,	u_int  hashtype_len,
				u_char	*engineID,	size_t  engineID_len,
				u_char	*Ku,		size_t  ku_len,
				u_char	*Kul,		size_t *kul_len);
 
int	encode_keychange (	oid	*hashtype,	u_int  hashtype_len,
				u_char	*oldkey,	size_t  oldkey_len,
				u_char	*newkey,	size_t  newkey_len,
				u_char	*kcstring,	size_t *kcstring_len);
 
int	decode_keychange (	oid	*hashtype,	u_int  hashtype_len,
				u_char	*oldkey,	size_t  oldkey_len,
				u_char	*kcstring,	size_t  kcstring_len,
				u_char	*newkey,	size_t *newkey_len);
 
 
/*
 * All functions devolve to the following block if we can't do cryptography
 */
#define	_KEYTOOLS_NOT_AVAILABLE			\
{						\
	return SNMPERR_KT_NOT_AVAILABLE;	\
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* _KEYTOOLS_H */