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7b4344ac3e
By loading the null provider into the default context, it is possible to verify that it is not accidentally being used. Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11488)
107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
/*
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* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include <stdio.h>
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#include <openssl/core.h>
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#include <openssl/core_numbers.h>
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#include <openssl/core_names.h>
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#include <openssl/params.h>
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#include "prov/implementations.h"
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OSSL_provider_init_fn ossl_null_provider_init;
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/* Functions provided by the core */
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static OSSL_core_gettable_params_fn *c_gettable_params = NULL;
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static OSSL_core_get_params_fn *c_get_params = NULL;
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/* Parameters we provide to the core */
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static const OSSL_ITEM null_param_types[] = {
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{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
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{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
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{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
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{ 0, NULL }
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};
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static const OSSL_ITEM *null_gettable_params(const OSSL_PROVIDER *prov)
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{
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return null_param_types;
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}
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static int null_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
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{
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OSSL_PARAM *p;
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p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
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if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Null Provider"))
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return 0;
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p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
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if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
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return 0;
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p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
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if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
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return 0;
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return 1;
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}
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static const OSSL_ALGORITHM *null_query(OSSL_PROVIDER *prov,
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int operation_id,
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int *no_cache)
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{
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*no_cache = 0;
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return NULL;
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}
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/* Functions we provide to the core */
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static const OSSL_DISPATCH null_dispatch_table[] = {
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{ OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))null_gettable_params },
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{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))null_get_params },
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{ OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))null_query },
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{ 0, NULL }
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};
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int ossl_null_provider_init(const OSSL_PROVIDER *provider,
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const OSSL_DISPATCH *in,
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const OSSL_DISPATCH **out,
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void **provctx)
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{
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OSSL_core_get_library_context_fn *c_get_libctx = NULL;
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for (; in->function_id != 0; in++) {
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switch (in->function_id) {
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case OSSL_FUNC_CORE_GETTABLE_PARAMS:
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c_gettable_params = OSSL_get_core_gettable_params(in);
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break;
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case OSSL_FUNC_CORE_GET_PARAMS:
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c_get_params = OSSL_get_core_get_params(in);
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break;
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case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
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c_get_libctx = OSSL_get_core_get_library_context(in);
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break;
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/* Just ignore anything we don't understand */
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default:
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break;
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}
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}
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if (c_get_libctx == NULL)
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return 0;
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*out = null_dispatch_table;
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/*
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* We want to make sure that all calls from this provider that requires
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* a library context use the same context as the one used to call our
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* functions. We do that by passing it along as the provider context.
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*/
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*provctx = c_get_libctx(provider);
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return 1;
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}
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