crypto/external/bsd/openssh/dist/schnorr.h

   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
  26 struct modp_group {
  27         BIGNUM *p, *q, *g;
  28 };
  29
  30 BIGNUM *bn_rand_range_gt_one(const BIGNUM *high);
  31 int hash_buffer(const u_char *, u_int, const EVP_MD *, u_char **, u_int *);
  32 void debug3_bn(const BIGNUM *, const char *, ...)
  33     __attribute__((__nonnull__ (2)))
  34     __attribute__((format(printf, 2, 3)));
  35 void debug3_buf(const u_char *, u_int, const char *, ...)
  36     __attribute__((__nonnull__ (3)))
  37     __attribute__((format(printf, 3, 4)));
  38 struct modp_group *modp_group_from_g_and_safe_p(const char *, const char *);
  39 void modp_group_free(struct modp_group *);
  40
  41 /* Signature and verification functions */
  42 int
  43 schnorr_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);
  46 int
  47 schnorr_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);
  50 int
  51 schnorr_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);
  54 int
  55 schnorr_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