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/*
* Copyright 2020-2021 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/opensslconf.h>
#include <openssl/core.h>
#include <openssl/core_dispatch.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include "prov/bio.h"
#include "prov/provider_ctx.h"
#include "prov/providercommon.h"
#include "prov/implementations.h"
#include "prov/provider_util.h"
#include "internal/nelem.h"
/*
* Forward declarations to ensure that interface functions are correctly
* defined.
*/
static OSSL_FUNC_provider_gettable_params_fn base_gettable_params;
static OSSL_FUNC_provider_get_params_fn base_get_params;
static OSSL_FUNC_provider_query_operation_fn base_query;
/* Functions provided by the core */
static OSSL_FUNC_core_gettable_params_fn *c_gettable_params = NULL;
static OSSL_FUNC_core_get_params_fn *c_get_params = NULL;
/* Parameters we provide to the core */
static const OSSL_PARAM base_param_types[] = {
OSSL_PARAM_DEFN(OSSL_PROV_PARAM_NAME, OSSL_PARAM_UTF8_PTR, NULL, 0),
OSSL_PARAM_DEFN(OSSL_PROV_PARAM_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
OSSL_PARAM_DEFN(OSSL_PROV_PARAM_BUILDINFO, OSSL_PARAM_UTF8_PTR, NULL, 0),
OSSL_PARAM_DEFN(OSSL_PROV_PARAM_STATUS, OSSL_PARAM_INTEGER, NULL, 0),
OSSL_PARAM_END
};
static const OSSL_PARAM *base_gettable_params(void *provctx)
{
return base_param_types;
}
static int base_get_params(void *provctx, 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 Base 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;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_STATUS);
if (p != NULL && !OSSL_PARAM_set_int(p, ossl_prov_is_running()))
return 0;
return 1;
}
static const OSSL_ALGORITHM base_encoder[] = {
#define ENCODER_PROVIDER "base"
#include "encoders.inc"
{ NULL, NULL, NULL }
#undef ENCODER_PROVIDER
};
static const OSSL_ALGORITHM base_decoder[] = {
#define DECODER_PROVIDER "base"
#include "decoders.inc"
{ NULL, NULL, NULL }
#undef DECODER_PROVIDER
};
static const OSSL_ALGORITHM base_store[] = {
#define STORE(name, _fips, func_table) \
{ name, "provider=base,fips=" _fips, (func_table) },
#include "stores.inc"
{ NULL, NULL, NULL }
#undef STORE
};
static const OSSL_ALGORITHM *base_query(void *provctx, int operation_id,
int *no_cache)
{
*no_cache = 0;
switch (operation_id) {
case OSSL_OP_ENCODER:
return base_encoder;
case OSSL_OP_DECODER:
return base_decoder;
case OSSL_OP_STORE:
return base_store;
}
return NULL;
}
static void base_teardown(void *provctx)
{
BIO_meth_free(ossl_prov_ctx_get0_core_bio_method(provctx));
ossl_prov_ctx_free(provctx);
}
/* Functions we provide to the core */
static const OSSL_DISPATCH base_dispatch_table[] = {
{ OSSL_FUNC_PROVIDER_TEARDOWN, (void (*)(void))base_teardown },
{ OSSL_FUNC_PROVIDER_GETTABLE_PARAMS,
(void (*)(void))base_gettable_params },
{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))base_get_params },
{ OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))base_query },
{ 0, NULL }
};
OSSL_provider_init_fn ossl_base_provider_init;
int ossl_base_provider_init(const OSSL_CORE_HANDLE *handle,
const OSSL_DISPATCH *in, const OSSL_DISPATCH **out,
void **provctx)
{
OSSL_FUNC_core_get_libctx_fn *c_get_libctx = NULL;
BIO_METHOD *corebiometh;
if (!ossl_prov_bio_from_dispatch(in))
return 0;
for (; in->function_id != 0; in++) {
switch (in->function_id) {
case OSSL_FUNC_CORE_GETTABLE_PARAMS:
c_gettable_params = OSSL_FUNC_core_gettable_params(in);
break;
case OSSL_FUNC_CORE_GET_PARAMS:
c_get_params = OSSL_FUNC_core_get_params(in);
break;
case OSSL_FUNC_CORE_GET_LIBCTX:
c_get_libctx = OSSL_FUNC_core_get_libctx(in);
break;
default:
/* Just ignore anything we don't understand */
break;
}
}
if (c_get_libctx == NULL)
return 0;
/*
* 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 in the provider context.
*
* This only works for built-in providers. Most providers should
* create their own library context.
*/
if ((*provctx = ossl_prov_ctx_new()) == NULL
|| (corebiometh = ossl_bio_prov_init_bio_method()) == NULL) {
ossl_prov_ctx_free(*provctx);
*provctx = NULL;
return 0;
}
ossl_prov_ctx_set0_libctx(*provctx,
(OSSL_LIB_CTX *)c_get_libctx(handle));
ossl_prov_ctx_set0_handle(*provctx, handle);
ossl_prov_ctx_set0_core_bio_method(*provctx, corebiometh);
*out = base_dispatch_table;
return 1;
}
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