crypto/openssh-4/dh.h

   1 /* $OpenBSD: dh.h,v 1.9 2006/03/25 22:22:43 djm Exp $ */
   2
   3 /*
   4  * Copyright (c) 2000 Niels Provos.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26 #ifndef DH_H
  27 #define DH_H
  28
  29 struct dhgroup {
  30         int size;
  31         BIGNUM *g;
  32         BIGNUM *p;
  33 };
  34
  35 DH      *choose_dh(int, int, int);
  36 DH      *dh_new_group_asc(const char *, const char *);
  37 DH      *dh_new_group(BIGNUM *, BIGNUM *);
  38 DH      *dh_new_group1(void);
  39 DH      *dh_new_group14(void);
  40
  41 void     dh_gen_key(DH *, int);
  42 int      dh_pub_is_valid(DH *, BIGNUM *);
  43
  44 int      dh_estimate(int);
  45
  46 #define DH_GRP_MIN      1024
  47 #define DH_GRP_MAX      8192
  48
  49 #endif