2 * Copyright 2019 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_numbers.h>
32 static OSSL_core_get_param_types_fn
*c_get_param_types
= NULL
;
33 static OSSL_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_ITEM p_param_types
[] = {
37 { OSSL_PARAM_UTF8_STRING
, "greeting" },
41 /* This is a trick to ensure we define the provider functions correctly */
42 static OSSL_provider_get_param_types_fn p_get_param_types
;
43 static OSSL_provider_get_params_fn p_get_params
;
45 static const OSSL_ITEM
*p_get_param_types(void *_
)
50 static int p_get_params(void *vprov
, OSSL_PARAM params
[])
52 const OSSL_PROVIDER
*prov
= vprov
;
53 OSSL_PARAM
*p
= params
;
56 for (; ok
&& p
->key
!= NULL
; p
++) {
57 if (strcmp(p
->key
, "greeting") == 0) {
58 static char *opensslv
;
59 static char *provname
;
60 static char *greeting
;
61 static OSSL_PARAM counter_request
[] = {
62 /* Known libcrypto provided parameters */
63 { "openssl-version", OSSL_PARAM_UTF8_PTR
,
64 &opensslv
, sizeof(&opensslv
), 0 },
65 { "provider-name", OSSL_PARAM_UTF8_PTR
,
66 &provname
, sizeof(&provname
), 0},
68 /* This might be present, if there's such a configuration */
69 { "greeting", OSSL_PARAM_UTF8_PTR
,
70 &greeting
, sizeof(&greeting
), 0 },
72 { NULL
, 0, NULL
, 0, 0 }
77 opensslv
= provname
= greeting
= NULL
;
79 if (c_get_params(prov
, counter_request
)) {
81 strcpy(buf
, greeting
);
83 const char *versionp
= *(void **)counter_request
[0].data
;
84 const char *namep
= *(void **)counter_request
[1].data
;
86 sprintf(buf
, "Hello OpenSSL %.20s, greetings from %s!",
90 sprintf(buf
, "Howdy stranger...");
93 p
->return_size
= buf_l
= strlen(buf
) + 1;
94 if (p
->data_size
>= buf_l
)
95 strncpy(p
->data
, buf
, buf_l
);
103 static const OSSL_DISPATCH p_test_table
[] = {
104 { OSSL_FUNC_PROVIDER_GET_PARAM_TYPES
, (void (*)(void))p_get_param_types
},
105 { OSSL_FUNC_PROVIDER_GET_PARAMS
, (void (*)(void))p_get_params
},
109 int OSSL_provider_init(const OSSL_PROVIDER
*provider
,
110 const OSSL_DISPATCH
*in
,
111 const OSSL_DISPATCH
**out
,
114 for (; in
->function_id
!= 0; in
++) {
115 switch (in
->function_id
) {
116 case OSSL_FUNC_CORE_GET_PARAM_TYPES
:
117 c_get_param_types
= OSSL_get_core_get_param_types(in
);
119 case OSSL_FUNC_CORE_GET_PARAMS
:
120 c_get_params
= OSSL_get_core_get_params(in
);
123 /* Just ignore anything we don't understand */
128 /* Because we use this in get_params, we need to pass it back */
129 *provctx
= (void *)provider
;