Home | History | Annotate | Line # | Download | only in providers 
      1 /*
      2  * Copyright 2020-2023 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_PARAM null_param_types[] = {
     23     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_NAME, OSSL_PARAM_UTF8_PTR, NULL, 0),
     24     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_VERSION, OSSL_PARAM_UTF8_PTR, NULL, 0),
     25     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_BUILDINFO, OSSL_PARAM_UTF8_PTR, NULL, 0),
     26     OSSL_PARAM_DEFN(OSSL_PROV_PARAM_STATUS, OSSL_PARAM_INTEGER, NULL, 0),
     27     OSSL_PARAM_END
     28 };
     29 
     30 static const OSSL_PARAM *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     OSSL_DISPATCH_END
     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 }
     81