A local copy of OpenSSL from GitHub
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/*
* Copyright 2020 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
*/
#include <string.h>
#include <stdio.h>
#include <openssl/core.h>
#include <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include "prov/implementations.h"
OSSL_provider_init_fn ossl_null_provider_init;
/* Functions provided by the core */
static OSSL_core_gettable_params_fn *c_gettable_params = NULL;
static OSSL_core_get_params_fn *c_get_params = NULL;
/* Parameters we provide to the core */
static const OSSL_ITEM null_param_types[] = {
{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
{ 0, NULL }
};
static const OSSL_ITEM *null_gettable_params(const OSSL_PROVIDER *prov)
{
return null_param_types;
}
static int null_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
{
OSSL_PARAM *p;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Null Provider"))
return 0;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
return 0;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
return 0;
return 1;
}
static const OSSL_ALGORITHM *null_query(OSSL_PROVIDER *prov,
int operation_id,
int *no_cache)
{
*no_cache = 0;
return NULL;
}
/* Functions we provide to the core */
static const OSSL_DISPATCH null_dispatch_table[] = {
{ OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))null_gettable_params },
{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))null_get_params },
{ OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))null_query },
{ 0, NULL }
};
int ossl_null_provider_init(const OSSL_PROVIDER *provider,
const OSSL_DISPATCH *in,
const OSSL_DISPATCH **out,
void **provctx)
{
OSSL_core_get_library_context_fn *c_get_libctx = NULL;
for (; in->function_id != 0; in++) {
switch (in->function_id) {
case OSSL_FUNC_CORE_GETTABLE_PARAMS:
c_gettable_params = OSSL_get_core_gettable_params(in);
break;
case OSSL_FUNC_CORE_GET_PARAMS:
c_get_params = OSSL_get_core_get_params(in);
break;
case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
c_get_libctx = OSSL_get_core_get_library_context(in);
break;
/* Just ignore anything we don't understand */
default:
break;
}
}
if (c_get_libctx == NULL)
return 0;
*out = null_dispatch_table;
/*
* We want to make sure that all calls from this provider that requires
* a library context use the same context as the one used to call our
* functions. We do that by passing it along as the provider context.
*/
*provctx = c_get_libctx(provider);
return 1;
}