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ac450140 | 1 | /* $OpenBSD: jpake.h,v 1.1 2008/11/04 08:22:13 djm Exp $ */ |
2 | /* | |
3 | * Copyright (c) 2008 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 JPAKE_H | |
19 | #define JPAKE_H | |
20 | ||
21 | #include <sys/types.h> | |
22 | ||
23 | #include <openssl/bn.h> | |
24 | ||
25 | /* Set JPAKE_DEBUG in CFLAGS for privacy-violating debugging */ | |
26 | #ifndef JPAKE_DEBUG | |
27 | # define JPAKE_DEBUG_BN(a) | |
28 | # define JPAKE_DEBUG_BUF(a) | |
29 | # define JPAKE_DEBUG_CTX(a) | |
30 | #else | |
31 | # define JPAKE_DEBUG_BN(a) jpake_debug3_bn a | |
32 | # define JPAKE_DEBUG_BUF(a) jpake_debug3_buf a | |
33 | # define JPAKE_DEBUG_CTX(a) jpake_dump a | |
34 | #endif /* SCHNORR_DEBUG */ | |
35 | ||
36 | struct jpake_group { | |
37 | BIGNUM *p, *q, *g; | |
38 | }; | |
39 | ||
40 | #define KZP_ID_LEN 16 /* Length of client and server IDs */ | |
41 | ||
42 | struct jpake_ctx { | |
43 | /* Parameters */ | |
44 | struct jpake_group *grp; | |
45 | ||
46 | /* Private values shared by client and server */ | |
47 | BIGNUM *s; /* Secret (salted, crypted password) */ | |
48 | BIGNUM *k; /* Derived key */ | |
49 | ||
50 | /* Client private values (NULL for server) */ | |
51 | BIGNUM *x1; /* random in Zq */ | |
52 | BIGNUM *x2; /* random in Z*q */ | |
53 | ||
54 | /* Server private values (NULL for server) */ | |
55 | BIGNUM *x3; /* random in Zq */ | |
56 | BIGNUM *x4; /* random in Z*q */ | |
57 | ||
58 | /* Step 1: C->S */ | |
59 | u_char *client_id; /* Anti-replay nonce */ | |
60 | u_int client_id_len; | |
61 | BIGNUM *g_x1; /* g^x1 */ | |
62 | BIGNUM *g_x2; /* g^x2 */ | |
63 | ||
64 | /* Step 1: S->C */ | |
65 | u_char *server_id; /* Anti-replay nonce */ | |
66 | u_int server_id_len; | |
67 | BIGNUM *g_x3; /* g^x3 */ | |
68 | BIGNUM *g_x4; /* g^x4 */ | |
69 | ||
70 | /* Step 2: C->S */ | |
71 | BIGNUM *a; /* g^((x1+x3+x4)*x2*s) */ | |
72 | ||
73 | /* Step 2: S->C */ | |
74 | BIGNUM *b; /* g^((x1+x2+x3)*x4*s) */ | |
75 | ||
76 | /* Confirmation: C->S */ | |
77 | u_char *h_k_cid_sessid; /* H(k || client_id || session_id) */ | |
78 | u_int h_k_cid_sessid_len; | |
79 | ||
80 | /* Confirmation: S->C */ | |
81 | u_char *h_k_sid_sessid; /* H(k || server_id || session_id) */ | |
82 | u_int h_k_sid_sessid_len; | |
83 | }; | |
84 | ||
85 | /* jpake.c */ | |
86 | struct jpake_group *jpake_default_group(void); | |
87 | BIGNUM *bn_rand_range_gt_one(const BIGNUM *high); | |
88 | int hash_buffer(const u_char *, u_int, const EVP_MD *, u_char **, u_int *); | |
89 | void jpake_debug3_bn(const BIGNUM *, const char *, ...) | |
90 | __attribute__((__nonnull__ (2))) | |
91 | __attribute__((format(printf, 2, 3))); | |
92 | void jpake_debug3_buf(const u_char *, u_int, const char *, ...) | |
93 | __attribute__((__nonnull__ (3))) | |
94 | __attribute__((format(printf, 3, 4))); | |
95 | void jpake_dump(struct jpake_ctx *, const char *, ...) | |
96 | __attribute__((__nonnull__ (2))) | |
97 | __attribute__((format(printf, 2, 3))); | |
98 | struct jpake_ctx *jpake_new(void); | |
99 | void jpake_free(struct jpake_ctx *); | |
100 | ||
101 | void jpake_step1(struct jpake_group *, u_char **, u_int *, | |
102 | BIGNUM **, BIGNUM **, BIGNUM **, BIGNUM **, | |
103 | u_char **, u_int *, u_char **, u_int *); | |
104 | ||
105 | void jpake_step2(struct jpake_group *, BIGNUM *, | |
106 | BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, | |
107 | const u_char *, u_int, const u_char *, u_int, | |
108 | const u_char *, u_int, const u_char *, u_int, | |
109 | BIGNUM **, u_char **, u_int *); | |
110 | ||
111 | void jpake_confirm_hash(const BIGNUM *, | |
112 | const u_char *, u_int, | |
113 | const u_char *, u_int, | |
114 | u_char **, u_int *); | |
115 | ||
116 | void jpake_key_confirm(struct jpake_group *, BIGNUM *, BIGNUM *, | |
117 | BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, | |
118 | const u_char *, u_int, const u_char *, u_int, | |
119 | const u_char *, u_int, const u_char *, u_int, | |
120 | BIGNUM **, u_char **, u_int *); | |
121 | ||
122 | int jpake_check_confirm(const BIGNUM *, const u_char *, u_int, | |
123 | const u_char *, u_int, const u_char *, u_int); | |
124 | ||
125 | /* schnorr.c */ | |
126 | int schnorr_sign(const BIGNUM *, const BIGNUM *, const BIGNUM *, | |
127 | const BIGNUM *, const BIGNUM *, const u_char *, u_int , | |
128 | u_char **, u_int *); | |
129 | int schnorr_verify(const BIGNUM *, const BIGNUM *, const BIGNUM *, | |
130 | const BIGNUM *, const u_char *, u_int, | |
131 | const u_char *, u_int); | |
132 | ||
133 | #endif /* JPAKE_H */ | |
134 |