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
null_gettable_params(const OSSL_PROVIDER * prov)30 static const OSSL_PARAM *null_gettable_params(const OSSL_PROVIDER *prov)
31 {
32 return null_param_types;
33 }
34
null_get_params(const OSSL_PROVIDER * provctx,OSSL_PARAM params[])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
null_query(OSSL_PROVIDER * prov,int operation_id,int * no_cache)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
ossl_null_provider_init(const OSSL_CORE_HANDLE * handle,const OSSL_DISPATCH * in,const OSSL_DISPATCH ** out,void ** provctx)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
