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/*
* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* This is a very simple provider that does absolutely nothing except respond
* to provider global parameter requests. It does this by simply echoing back
* a parameter request it makes to the loading library.
*/
#include <string.h>
#include <stdio.h>
/*
* When built as an object file to link the application with, we get the
* init function name through the macro PROVIDER_INIT_FUNCTION_NAME. If
* not defined, we use the standard init function name for the shared
* object form.
*/
#ifdef PROVIDER_INIT_FUNCTION_NAME
# define OSSL_provider_init PROVIDER_INIT_FUNCTION_NAME
#endif
#include <openssl/core.h>
#include <openssl/core_numbers.h>
static OSSL_core_get_param_types_fn *c_get_param_types = NULL;
static OSSL_core_get_params_fn *c_get_params = NULL;
/* Tell the core what params we provide and what type they are */
static const OSSL_ITEM p_param_types[] = {
{ OSSL_PARAM_UTF8_STRING, "greeting" },
{ 0, NULL }
};
static const OSSL_ITEM *p_get_param_types(const OSSL_PROVIDER *_)
{
return p_param_types;
}
static int p_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
{
const OSSL_PARAM *p = params;
int ok = 1;
for (; ok && p->key != NULL; p++) {
if (strcmp(p->key, "greeting") == 0) {
static char *opensslv = NULL;
static char *provname = NULL;
static char *greeting = NULL;
static OSSL_PARAM counter_request[] = {
/* Known libcrypto provided parameters */
{ "openssl-version", OSSL_PARAM_UTF8_PTR,
&opensslv, sizeof(&opensslv), NULL },
{ "provider-name", OSSL_PARAM_UTF8_PTR,
&provname, sizeof(&provname), NULL},
/* This might be present, if there's such a configuration */
{ "greeting", OSSL_PARAM_UTF8_PTR,
&greeting, sizeof(&greeting), NULL },
{ NULL, 0, NULL, 0, NULL }
};
char buf[256];
size_t buf_l;
if (c_get_params(prov, counter_request)) {
if (greeting) {
strcpy(buf, greeting);
} else {
const char *versionp = *(void **)counter_request[0].data;
const char *namep = *(void **)counter_request[1].data;
sprintf(buf, "Hello OpenSSL %.20s, greetings from %s!",
versionp, namep);
}
} else {
sprintf(buf, "Howdy stranger...");
}
*p->return_size = buf_l = strlen(buf) + 1;
if (p->data_size >= buf_l)
strncpy(p->data, buf, buf_l);
else
ok = 0;
}
}
return ok;
}
static const OSSL_DISPATCH p_test_table[] = {
{ OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))p_get_param_types },
{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))p_get_params },
{ 0, NULL }
};
int OSSL_provider_init(const OSSL_PROVIDER *provider,
const OSSL_DISPATCH *in,
const OSSL_DISPATCH **out)
{
for (; in->function_id != 0; in++) {
switch (in->function_id) {
case OSSL_FUNC_CORE_GET_PARAM_TYPES:
c_get_param_types = OSSL_get_core_get_param_types(in);
break;
case OSSL_FUNC_CORE_GET_PARAMS:
c_get_params = OSSL_get_core_get_params(in);
break;
default:
/* Just ignore anything we don't understand */
break;
}
}
*out = p_test_table;
return 1;
}
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