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| -rw-r--r-- | dh.h | 80 |
1 files changed, 80 insertions, 0 deletions
@@ -0,0 +1,80 @@ +/* $OpenBSD: dh.h,v 1.15 2016/05/02 10:26:04 djm 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 + +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); + +/* + * Max value from RFC4419. + * Miniumum increased in light of DH precomputation attacks. + */ +#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 |