providers/nullprov.c

   1 /*
   2  * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <string.h>
  11 #include <stdio.h>
  12 #include <openssl/core.h>
  13 #include <openssl/core_dispatch.h>
  14 #include <openssl/core_names.h>
  15 #include <openssl/params.h>
  16 #include "prov/implementations.h"
  17 #include "prov/providercommon.h"
  18
  19 OSSL_provider_init_fn ossl_null_provider_init;
  20
  21 /* Parameters we provide to the core */
  22 static const OSSL_ITEM null_param_types[] = {
  23     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
  24     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
  25     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
  26     { OSSL_PARAM_INTEGER, OSSL_PROV_PARAM_STATUS },
  27     { 0, NULL }
  28 };
  29
  30 static const OSSL_ITEM *null_gettable_params(const OSSL_PROVIDER *prov)
  31 {
  32     return null_param_types;
  33 }
  34
  35 static int null_get_params(const OSSL_PROVIDER *provctx, OSSL_PARAM params[])
  36 {
  37     OSSL_PARAM *p;
  38
  39     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
  40     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Null Provider"))
  41         return 0;
  42     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
  43     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
  44         return 0;
  45     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
  46     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
  47         return 0;
  48     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_STATUS);
  49     if (p != NULL && !OSSL_PARAM_set_int(p, ossl_prov_is_running()))
  50         return 0;
  51     return 1;
  52 }
  53
  54 static const OSSL_ALGORITHM *null_query(OSSL_PROVIDER *prov,
  55                                           int operation_id,
  56                                           int *no_cache)
  57 {
  58     *no_cache = 0;
  59     return NULL;
  60 }
  61
  62 /* Functions we provide to the core */
  63 static const OSSL_DISPATCH null_dispatch_table[] = {
  64     { OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))null_gettable_params },
  65     { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))null_get_params },
  66     { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))null_query },
  67     { 0, NULL }
  68 };
  69
  70 int ossl_null_provider_init(const OSSL_CORE_HANDLE *handle,
  71                             const OSSL_DISPATCH *in,
  72                             const OSSL_DISPATCH **out,
  73                             void **provctx)
  74 {
  75     *out = null_dispatch_table;
  76
  77     /* Could be anything - we don't use it */
  78     *provctx = (void *)handle;
  79     return 1;
  80 }