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Revision 1.19, Fri Mar 12 04:08:19 2021 UTC (3 years, 2 months ago) by dtucker
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, HEAD
Changes since 1.18: +2 -1 lines 

Add ModuliFile keyword to sshd_config to specify the location of the
"moduli" file containing the groups for DH-GEX.  This will allow us to
run tests against arbitrary moduli files without having to install them.
ok djm@

/* $OpenBSD: dh.h,v 1.19 2021/03/12 04:08:19 dtucker Exp $ */

/*
 * Copyright (c) 2000 Niels Provos.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef DH_H
#define DH_H

#ifdef WITH_OPENSSL

struct dhgroup {
	int size;
	BIGNUM *g;
	BIGNUM *p;
};

DH	*choose_dh(int, int, int);
DH	*dh_new_group_asc(const char *, const char *);
DH	*dh_new_group(BIGNUM *, BIGNUM *);
DH	*dh_new_group1(void);
DH	*dh_new_group14(void);
DH	*dh_new_group16(void);
DH	*dh_new_group18(void);
DH	*dh_new_group_fallback(int);

int	 dh_gen_key(DH *, int);
int	 dh_pub_is_valid(const DH *, const BIGNUM *);

u_int	 dh_estimate(int);
void	 dh_set_moduli_file(const char *);

/*
 * Max value from RFC4419.
 * Min value from RFC8270.
 */
#define DH_GRP_MIN	2048
#define DH_GRP_MAX	8192

/*
 * Values for "type" field of moduli(5)
 * Specifies the internal structure of the prime modulus.
 */
#define MODULI_TYPE_UNKNOWN		(0)
#define MODULI_TYPE_UNSTRUCTURED	(1)
#define MODULI_TYPE_SAFE		(2)
#define MODULI_TYPE_SCHNORR		(3)
#define MODULI_TYPE_SOPHIE_GERMAIN	(4)
#define MODULI_TYPE_STRONG		(5)

/*
 * Values for "tests" field of moduli(5)
 * Specifies the methods used in checking for primality.
 * Usually, more than one test is used.
 */
#define MODULI_TESTS_UNTESTED		(0x00)
#define MODULI_TESTS_COMPOSITE		(0x01)
#define MODULI_TESTS_SIEVE		(0x02)
#define MODULI_TESTS_MILLER_RABIN	(0x04)
#define MODULI_TESTS_JACOBI		(0x08)
#define MODULI_TESTS_ELLIPTIC		(0x10)

#endif /* WITH_OPENSSL */

#endif /* DH_H */