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_DSA_H
39#define _HEIM_DSA_H 1
40
41#include <hcrypto/bn.h>
42
43/* symbol renaming */
44#define DSA_null_method hc_DSA_null_method
45#define DSA_new hc_DSA_new
46#define DSA_free hc_DSA_free
47#define DSA_up_ref hc_DSA_up_ref
48#define DSA_set_default_method hc_DSA_set_default_method
49#define DSA_get_default_method hc_DSA_get_default_method
50#define DSA_set_method hc_DSA_set_method
51#define DSA_get_method hc_DSA_get_method
52#define DSA_set_app_data hc_DSA_set_app_data
53#define DSA_get_app_data hc_DSA_get_app_data
54#define DSA_size hc_DSA_size
55#define DSA_verify hc_DSA_verify
56
57/*
58 *
59 */
60
61
62typedef struct DSA DSA;
63typedef struct DSA_METHOD DSA_METHOD;
64typedef struct DSA_SIG DSA_SIG;
65
66struct DSA_SIG {
67    BIGNUM *r;
68    BIGNUM *s;
69};
70
71struct DSA_METHOD {
72    const char *name;
73    DSA_SIG * (*dsa_do_sign)(const unsigned char *, int, DSA *);
74    int (*dsa_sign_setup)(DSA *, BN_CTX *, BIGNUM **, BIGNUM **);
75    int (*dsa_do_verify)(const unsigned char *, int, DSA_SIG *, DSA *);
76    int (*dsa_mod_exp)(DSA *, BIGNUM *, BIGNUM *, BIGNUM *,
77		       BIGNUM *, BIGNUM *, BIGNUM *, BN_CTX *,
78		       BN_MONT_CTX *);
79    int (*bn_mod_exp)(DSA *, BIGNUM *, BIGNUM *, const BIGNUM *,
80		      const BIGNUM *, BN_CTX *,
81		      BN_MONT_CTX *);
82    int (*init)(DSA *);
83    int (*finish)(DSA *);
84    int flags;
85    void *app_data;
86};
87
88struct DSA {
89    int pad;
90    long version;
91    int write_params;
92    BIGNUM *p;
93    BIGNUM *q;
94    BIGNUM *g;
95
96    BIGNUM *pub_key;
97    BIGNUM *priv_key;
98
99    BIGNUM *kinv;
100    BIGNUM *r;
101    int flags;
102    void *method_mont_p;
103    int references;
104    struct dsa_CRYPTO_EX_DATA {
105	void *sk;
106	int dummy;
107    } ex_data;
108    const DSA_METHOD *meth;
109    void *engine;
110};
111
112/*
113 *
114 */
115
116const DSA_METHOD *DSA_null_method(void);
117
118/*
119 *
120 */
121
122DSA *	DSA_new(void);
123void	DSA_free(DSA *);
124int	DSA_up_ref(DSA *);
125
126void	DSA_set_default_method(const DSA_METHOD *);
127const DSA_METHOD * DSA_get_default_method(void);
128
129const DSA_METHOD * DSA_get_method(const DSA *);
130int DSA_set_method(DSA *, const DSA_METHOD *);
131
132void	DSA_set_app_data(DSA *, void *arg);
133void *	DSA_get_app_data(DSA *);
134
135int	DSA_size(const DSA *);
136
137int	DSA_verify(int, const unsigned char *, int,
138		   const unsigned char *, int, DSA *);
139
140#endif /* _HEIM_DSA_H */
141