2 * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * This is a very simple provider that does absolutely nothing except respond
12 * to provider global parameter requests. It does this by simply echoing back
13 * a parameter request it makes to the loading library.
20 * When built as an object file to link the application with, we get the
21 * init function name through the macro PROVIDER_INIT_FUNCTION_NAME. If
22 * not defined, we use the standard init function name for the shared
25 #ifdef PROVIDER_INIT_FUNCTION_NAME
26 # define OSSL_provider_init PROVIDER_INIT_FUNCTION_NAME
29 #include <openssl/core.h>
30 #include <openssl/core_dispatch.h>
32 static OSSL_FUNC_core_gettable_params_fn
*c_gettable_params
= NULL
;
33 static OSSL_FUNC_core_get_params_fn
*c_get_params
= NULL
;
35 /* Tell the core what params we provide and what type they are */
36 static const OSSL_PARAM p_param_types
[] = {
37 { "greeting", OSSL_PARAM_UTF8_STRING
, NULL
, 0, 0 },
38 { NULL
, 0, NULL
, 0, 0 }
41 /* This is a trick to ensure we define the provider functions correctly */
42 static OSSL_FUNC_provider_gettable_params_fn p_gettable_params
;
43 static OSSL_FUNC_provider_get_params_fn p_get_params
;
44 static OSSL_FUNC_provider_get_reason_strings_fn p_get_reason_strings
;
46 static const OSSL_PARAM
*p_gettable_params(void *_
)
51 static int p_get_params(void *vhand
, OSSL_PARAM params
[])
53 const OSSL_CORE_HANDLE
*hand
= vhand
;
54 OSSL_PARAM
*p
= params
;
57 for (; ok
&& p
->key
!= NULL
; p
++) {
58 if (strcmp(p
->key
, "greeting") == 0) {
59 static char *opensslv
;
60 static char *provname
;
61 static char *greeting
;
62 static OSSL_PARAM counter_request
[] = {
63 /* Known libcrypto provided parameters */
64 { "openssl-version", OSSL_PARAM_UTF8_PTR
,
65 &opensslv
, sizeof(&opensslv
), 0 },
66 { "provider-name", OSSL_PARAM_UTF8_PTR
,
67 &provname
, sizeof(&provname
), 0},
69 /* This might be present, if there's such a configuration */
70 { "greeting", OSSL_PARAM_UTF8_PTR
,
71 &greeting
, sizeof(&greeting
), 0 },
73 { NULL
, 0, NULL
, 0, 0 }
78 opensslv
= provname
= greeting
= NULL
;
80 if (c_get_params(hand
, counter_request
)) {
82 strcpy(buf
, greeting
);
84 const char *versionp
= *(void **)counter_request
[0].data
;
85 const char *namep
= *(void **)counter_request
[1].data
;
87 sprintf(buf
, "Hello OpenSSL %.20s, greetings from %s!",
91 sprintf(buf
, "Howdy stranger...");
94 p
->return_size
= buf_l
= strlen(buf
) + 1;
95 if (p
->data_size
>= buf_l
)
104 static const OSSL_ITEM
*p_get_reason_strings(void *_
)
106 static const OSSL_ITEM reason_strings
[] = {
107 {1, "dummy reason string"},
111 return reason_strings
;
114 static const OSSL_DISPATCH p_test_table
[] = {
115 { OSSL_FUNC_PROVIDER_GETTABLE_PARAMS
, (void (*)(void))p_gettable_params
},
116 { OSSL_FUNC_PROVIDER_GET_PARAMS
, (void (*)(void))p_get_params
},
117 { OSSL_FUNC_PROVIDER_GET_REASON_STRINGS
,
118 (void (*)(void))p_get_reason_strings
},
122 int OSSL_provider_init(const OSSL_CORE_HANDLE
*handle
,
123 const OSSL_DISPATCH
*in
,
124 const OSSL_DISPATCH
**out
,
127 for (; in
->function_id
!= 0; in
++) {
128 switch (in
->function_id
) {
129 case OSSL_FUNC_CORE_GETTABLE_PARAMS
:
130 c_gettable_params
= OSSL_FUNC_core_gettable_params(in
);
132 case OSSL_FUNC_CORE_GET_PARAMS
:
133 c_get_params
= OSSL_FUNC_core_get_params(in
);
136 /* Just ignore anything we don't understand */
141 /* Because we use this in get_params, we need to pass it back */
142 *provctx
= (void *)handle
;