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61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
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/* $OpenBSD: schnorr.h,v 1.1 2009/03/05 07:18:19 djm Exp $ */
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/*
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* Copyright (c) 2009 Damien Miller. All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef SCHNORR_H
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#define SCHNORR_H
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#include <sys/types.h>
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#include <openssl/bn.h>
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struct modp_group {
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BIGNUM *p, *q, *g;
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};
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BIGNUM *bn_rand_range_gt_one(const BIGNUM *high);
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int hash_buffer(const u_char *, u_int, const EVP_MD *, u_char **, u_int *);
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void debug3_bn(const BIGNUM *, const char *, ...)
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__attribute__((__nonnull__ (2)))
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__attribute__((format(printf, 2, 3)));
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void debug3_buf(const u_char *, u_int, const char *, ...)
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__attribute__((__nonnull__ (3)))
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__attribute__((format(printf, 3, 4)));
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struct modp_group *modp_group_from_g_and_safe_p(const char *, const char *);
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void modp_group_free(struct modp_group *);
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/* Signature and verification functions */
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int
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schnorr_sign(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g,
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const EVP_MD *evp_md, const BIGNUM *x, const BIGNUM *g_x,
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const u_char *id, u_int idlen, BIGNUM **r_p, BIGNUM **e_p);
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int
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schnorr_sign_buf(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g,
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const BIGNUM *x, const BIGNUM *g_x, const u_char *id, u_int idlen,
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u_char **sig, u_int *siglen);
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int
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schnorr_verify(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g,
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const EVP_MD *evp_md, const BIGNUM *g_x, const u_char *id, u_int idlen,
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const BIGNUM *r, const BIGNUM *e);
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int
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schnorr_verify_buf(const BIGNUM *grp_p, const BIGNUM *grp_q,
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const BIGNUM *grp_g,
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const BIGNUM *g_x, const u_char *id, u_int idlen,
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const u_char *sig, u_int siglen);
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#endif /* JPAKE_H */
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