1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/* Copyright (c) 2014, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#ifndef OPENSSL_HEADER_ENGINE_H
#define OPENSSL_HEADER_ENGINE_H
#include <openssl/base.h>
#if defined(__cplusplus)
extern "C" {
#endif
/* Engines are collections of methods. Methods are tables of function pointers,
* defined for certain algorithms, that allow operations on those algorithms to
* be overridden via a callback. This can be used, for example, to implement an
* RSA* that forwards operations to a hardware module.
*
* Methods are reference counted but |ENGINE|s are not. When creating a method,
* you should zero the whole structure and fill in the function pointers that
* you wish before setting it on an |ENGINE|. Any functions pointers that
* are NULL indicate that the default behaviour should be used. */
/* Allocation and destruction. */
/* ENGINE_new returns an empty ENGINE that uses the default method for all
* algorithms. */
OPENSSL_EXPORT ENGINE *ENGINE_new(void);
/* ENGINE_free decrements the reference counts for all methods linked from
* |engine| and frees |engine| itself. */
OPENSSL_EXPORT void ENGINE_free(ENGINE *engine);
/* Method accessors.
*
* Method accessors take a method pointer and the size of the structure. The
* size allows for ABI compatibility in the case that the method structure is
* extended with extra elements at the end. Methods are always copied by the
* set functions.
*
* Set functions return one on success and zero on allocation failure. */
OPENSSL_EXPORT int ENGINE_set_DH_method(ENGINE *engine, const DH_METHOD *method,
size_t method_size);
OPENSSL_EXPORT DH_METHOD *ENGINE_get_DH_method(const ENGINE *engine);
OPENSSL_EXPORT int ENGINE_set_DSA_method(ENGINE *engine,
const DSA_METHOD *method,
size_t method_size);
OPENSSL_EXPORT DSA_METHOD *ENGINE_get_DSA_method(const ENGINE *engine);
OPENSSL_EXPORT int ENGINE_set_RSA_method(ENGINE *engine,
const RSA_METHOD *method,
size_t method_size);
OPENSSL_EXPORT RSA_METHOD *ENGINE_get_RSA_method(const ENGINE *engine);
OPENSSL_EXPORT int ENGINE_set_ECDSA_method(ENGINE *engine,
const ECDSA_METHOD *method,
size_t method_size);
OPENSSL_EXPORT ECDSA_METHOD *ENGINE_get_ECDSA_method(const ENGINE *engine);
/* Generic method functions.
*
* These functions take a void* type but actually operate on all method
* structures. */
/* METHOD_ref increments the reference count of |method|. */
OPENSSL_EXPORT void METHOD_ref(void *method);
/* METHOD_unref decrements the reference count of |method| and frees it if the
* reference count drops to zero. */
OPENSSL_EXPORT void METHOD_unref(void *method);
/* Private functions. */
/* openssl_method_common_st contains the common part of all method structures.
* This must be the first member of all method structures. */
struct openssl_method_common_st {
int references;
char is_static;
};
#if defined(__cplusplus)
} /* extern C */
#endif
#define ENGINE_R_OPERATION_NOT_SUPPORTED 100
#endif /* OPENSSL_HEADER_ENGINE_H */
|
