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d40b42ab4c
A provider could be linked against a different version of libcrypto than the version of libcrypto that loaded the provider. Different versions of libcrypto could define opaque types differently. It must never occur that a type created in one libcrypto is used directly by the other libcrypto. This will cause crashes. We can "cheat" for "built-in" providers that are part of libcrypto itself, because we know that the two libcrypto versions are the same - but not for other providers. To ensure this does not occur we use different types names for the handful of opaque types that are passed between the core and providers. Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11758)
77 lines
2.4 KiB
C
77 lines
2.4 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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/* 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_CORE_HANDLE *handle,
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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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*out = null_dispatch_table;
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/* Could be anything - we don't use it */
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*provctx = (void *)handle;
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return 1;
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}
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