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_gettable_params_fn *c_gettable_params = 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_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_provider_gettable_params_fn p_gettable_params;
43 static OSSL_provider_get_params_fn p_get_params;
45 static const OSSL_PARAM *p_gettable_params(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)
103 static const OSSL_DISPATCH p_test_table[] = {
104 { OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))p_gettable_params },
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_GETTABLE_PARAMS:
117 c_gettable_params = OSSL_get_core_gettable_params(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;