1/* $NetBSD$ */ 2/* $OpenBSD: schnorr.h,v 1.1 2009/03/05 07:18:19 djm Exp $ */ 3/* 4 * Copyright (c) 2009 Damien Miller. All rights reserved. 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19#ifndef SCHNORR_H 20#define SCHNORR_H 21 22#include <sys/types.h> 23 24#include <openssl/bn.h> 25 26struct modp_group { 27 BIGNUM *p, *q, *g; 28}; 29 30BIGNUM *bn_rand_range_gt_one(const BIGNUM *high); 31int hash_buffer(const u_char *, u_int, const EVP_MD *, u_char **, u_int *); 32void debug3_bn(const BIGNUM *, const char *, ...) 33 __attribute__((__nonnull__ (2))) 34 __attribute__((format(printf, 2, 3))); 35void debug3_buf(const u_char *, u_int, const char *, ...) 36 __attribute__((__nonnull__ (3))) 37 __attribute__((format(printf, 3, 4))); 38struct modp_group *modp_group_from_g_and_safe_p(const char *, const char *); 39void modp_group_free(struct modp_group *); 40 41/* Signature and verification functions */ 42int 43schnorr_sign(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g, 44 const EVP_MD *evp_md, const BIGNUM *x, const BIGNUM *g_x, 45 const u_char *id, u_int idlen, BIGNUM **r_p, BIGNUM **e_p); 46int 47schnorr_sign_buf(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g, 48 const BIGNUM *x, const BIGNUM *g_x, const u_char *id, u_int idlen, 49 u_char **sig, u_int *siglen); 50int 51schnorr_verify(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g, 52 const EVP_MD *evp_md, const BIGNUM *g_x, const u_char *id, u_int idlen, 53 const BIGNUM *r, const BIGNUM *e); 54int 55schnorr_verify_buf(const BIGNUM *grp_p, const BIGNUM *grp_q, 56 const BIGNUM *grp_g, 57 const BIGNUM *g_x, const u_char *id, u_int idlen, 58 const u_char *sig, u_int siglen); 59 60#endif /* JPAKE_H */ 61 62