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5b01421b | 1 | /* $OpenBSD: schnorr.h,v 1.1 2009/03/05 07:18:19 djm Exp $ */ |
2 | /* | |
3 | * Copyright (c) 2009 Damien Miller. All rights reserved. | |
4 | * | |
5 | * Permission to use, copy, modify, and distribute this software for any | |
6 | * purpose with or without fee is hereby granted, provided that the above | |
7 | * copyright notice and this permission notice appear in all copies. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
16 | */ | |
17 | ||
18 | #ifndef SCHNORR_H | |
19 | #define SCHNORR_H | |
20 | ||
21 | #include <sys/types.h> | |
22 | ||
23 | #include <openssl/bn.h> | |
24 | ||
25 | struct modp_group { | |
26 | BIGNUM *p, *q, *g; | |
27 | }; | |
28 | ||
29 | BIGNUM *bn_rand_range_gt_one(const BIGNUM *high); | |
30 | int hash_buffer(const u_char *, u_int, const EVP_MD *, u_char **, u_int *); | |
31 | void debug3_bn(const BIGNUM *, const char *, ...) | |
32 | __attribute__((__nonnull__ (2))) | |
33 | __attribute__((format(printf, 2, 3))); | |
34 | void debug3_buf(const u_char *, u_int, const char *, ...) | |
35 | __attribute__((__nonnull__ (3))) | |
36 | __attribute__((format(printf, 3, 4))); | |
37 | struct modp_group *modp_group_from_g_and_safe_p(const char *, const char *); | |
38 | void modp_group_free(struct modp_group *); | |
39 | ||
40 | /* Signature and verification functions */ | |
41 | int | |
42 | schnorr_sign(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g, | |
43 | const EVP_MD *evp_md, const BIGNUM *x, const BIGNUM *g_x, | |
44 | const u_char *id, u_int idlen, BIGNUM **r_p, BIGNUM **e_p); | |
45 | int | |
46 | schnorr_sign_buf(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g, | |
47 | const BIGNUM *x, const BIGNUM *g_x, const u_char *id, u_int idlen, | |
48 | u_char **sig, u_int *siglen); | |
49 | int | |
50 | schnorr_verify(const BIGNUM *grp_p, const BIGNUM *grp_q, const BIGNUM *grp_g, | |
51 | const EVP_MD *evp_md, const BIGNUM *g_x, const u_char *id, u_int idlen, | |
52 | const BIGNUM *r, const BIGNUM *e); | |
53 | int | |
54 | schnorr_verify_buf(const BIGNUM *grp_p, const BIGNUM *grp_q, | |
55 | const BIGNUM *grp_g, | |
56 | const BIGNUM *g_x, const u_char *id, u_int idlen, | |
57 | const u_char *sig, u_int siglen); | |
58 | ||
59 | #endif /* JPAKE_H */ | |
60 |