1/*
2 * Copyright (c) 2006 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/*
35 * $Id$
36 */
37
38#ifndef _HEIM_DH_H
39#define _HEIM_DH_H 1
40
41/* symbol renaming */
42#define DH_null_method hc_DH_null_method
43#define DH_imath_method hc_DH_imath_method
44#define DH_cdsa_method hc_DH_cdsa_method
45#define DH_tfm_method hc_DH_tfm_method
46#define DH_ltm_method hc_DH_ltm_method
47#define DH_sf_method hc_DH_sf_method
48#define DH_new hc_DH_new
49#define DH_new_method hc_DH_new_method
50#define DH_free hc_DH_free
51#define DH_up_ref hc_DH_up_ref
52#define DH_size hc_DH_size
53#define DH_set_default_method hc_DH_set_default_method
54#define DH_get_default_method hc_DH_get_default_method
55#define DH_set_method hc_DH_set_method
56#define DH_get_method hc_DH_get_method
57#define DH_set_ex_data hc_DH_set_ex_data
58#define DH_get_ex_data hc_DH_get_ex_data
59#define DH_generate_parameters_ex hc_DH_generate_parameters_ex
60#define DH_check_pubkey hc_DH_check_pubkey
61#define DH_generate_key hc_DH_generate_key
62#define DH_compute_key hc_DH_compute_key
63#define	i2d_DHparams hc_i2d_DHparams
64
65/*
66 *
67 */
68
69typedef struct DH DH;
70typedef struct DH_METHOD DH_METHOD;
71
72#include <hcrypto/bn.h>
73#include <hcrypto/engine.h>
74
75struct DH_METHOD {
76    const char *name;
77    int (*generate_key)(DH *);
78    int (*compute_key)(unsigned char *,const BIGNUM *,DH *);
79    int (*bn_mod_exp)(const DH *, BIGNUM *, const BIGNUM *,
80		      const BIGNUM *, const BIGNUM *, BN_CTX *,
81		      BN_MONT_CTX *);
82    int (*init)(DH *);
83    int (*finish)(DH *);
84    int flags;
85    void *app_data;
86    int (*generate_params)(DH *, int, int, BN_GENCB *);
87};
88
89struct DH {
90    int pad;
91    int version;
92    BIGNUM *p;
93    BIGNUM *g;
94    long length;
95    BIGNUM *pub_key;
96    BIGNUM *priv_key;
97    int flags;
98    void *method_mont_p;
99    BIGNUM *q;
100    BIGNUM *j;
101    void *seed;
102    int seedlen;
103    BIGNUM *counter;
104    int references;
105    struct CRYPTO_EX_DATA {
106	void *sk;
107	int dummy;
108    } ex_data;
109    const DH_METHOD *meth;
110    ENGINE *engine;
111};
112
113/* DH_check_pubkey return codes in `codes' argument. */
114#define DH_CHECK_PUBKEY_TOO_SMALL 1
115#define DH_CHECK_PUBKEY_TOO_LARGE 2
116
117/*
118 *
119 */
120
121const DH_METHOD *DH_null_method(void);
122const DH_METHOD *DH_tfm_method(void);
123const DH_METHOD *DH_ltm_method(void);
124const DH_METHOD *DH_imath_method(void);
125const DH_METHOD *DH_cdsa_method(void);
126const DH_METHOD *DH_sf_method(void);
127
128DH *	DH_new(void);
129DH *	DH_new_method(ENGINE *);
130void	DH_free(DH *);
131int	DH_up_ref(DH *);
132
133int	DH_size(const DH *);
134
135
136void	DH_set_default_method(const DH_METHOD *);
137const DH_METHOD *
138	DH_get_default_method(void);
139int	DH_set_method(DH *, const DH_METHOD *);
140
141int	DH_set_ex_data(DH *, int, void *);
142void *	DH_get_ex_data(DH *, int);
143
144int	DH_generate_parameters_ex(DH *, int, int, BN_GENCB *);
145int	DH_check_pubkey(const DH *, const BIGNUM *, int *);
146int	DH_generate_key(DH *);
147int	DH_compute_key(unsigned char *,const BIGNUM *,DH *);
148
149int	i2d_DHparams(DH *, unsigned char **);
150
151#endif /* _HEIM_DH_H */
152
153