5 OSSL_PROVIDER, OSSL_PROVIDER_load, OSSL_PROVIDER_unload,
6 OSSL_PROVIDER_get_param_types, OSSL_PROVIDER_get_params,
7 OSSL_PROVIDER_add_builtin, OSSL_PROVIDER_name - provider routines
11 #include <openssl/provider.h>
13 typedef struct ossl_provider_st OSSL_PROVIDER;
15 OSSL_PROVIDER *OSSL_PROVIDER_load(OPENSSL_CTX *, const char *name);
16 int OSSL_PROVIDER_unload(OSSL_PROVIDER *prov);
18 const OSSL_PARAM *OSSL_PROVIDER_get_param_types(OSSL_PROVIDER *prov);
19 int OSSL_PROVIDER_get_params(OSSL_PROVIDER *prov, OSSL_PARAM params[]);
21 int OSSL_PROVIDER_add_builtin(OPENSSL_CTX *, const char *name,
22 ossl_provider_init_fn *init_fn);
24 const char *OSSL_PROVIDER_name(const OSSL_PROVIDER *prov);
28 B<OSSL_PROVIDER> is a type that holds internal information about
29 implementation providers (see L<provider(7)> for information on what a
31 A provider can be built in to the application or the OpenSSL
32 libraries, or can be a loadable module.
33 The functions described here handle both forms.
37 OSSL_PROVIDER_add_builtin() is used to add a built in provider to
38 B<OSSL_PROVIDER> store in the given library context, by associating a
39 provider name with a provider initialization function.
40 This name can then be used with OSSL_PROVIDER_load().
42 OSSL_PROVIDER_load() loads and initializes a provider.
43 This may simply initialize a provider that was previously added with
44 OSSL_PROVIDER_add_builtin() and run its given initialization function,
45 or load a provider module with the given name and run its provider
46 entry point, C<OSSL_provider_init>.
48 OSSL_PROVIDER_unload() unloads the given provider.
49 For a provider added with OSSL_PROVIDER_add_builtin(), this simply
50 runs its teardown function.
52 OSSL_PROVIDER_get_param_types() is used to get a provider parameter
53 descriptor set as a constant B<OSSL_PARAM> array.
54 See L<OSSL_PARAM(3)> for more information.
56 OSSL_PROVIDER_get_params() is used to get provider parameter values.
57 The caller must prepare the B<OSSL_PARAM> array before calling this
58 function, and the variables acting as buffers for this parameter array
59 should be filled with data when it returns successfully.
61 OSSL_PROVIDER_name() returns the name of the given provider.
65 OSSL_PROVIDER_add() returns 1 on success, or 0 on error.
67 OSSL_PROVIDER_load() returns a pointer to a provider object on
68 success, or B<NULL> on error.
70 OSSL_PROVIDER_unload() returns 1 on success, or 0 on error.
72 OSSL_PROVIDER_get_param_types() returns a pointer to an array
73 of constant B<OSSL_PARAM>, or NULL if none is provided.
75 OSSL_PROVIDER_get_params() returns 1 on success, or 0 on error.
79 This demonstrates how to load the provider module "foo" and ask for
82 OSSL_PROVIDER *prov = NULL;
83 const char *build = NULL;
85 OSSL_PARAM request[] = {
86 { "build", OSSL_PARAM_UTF8_STRING_PTR, &build, 0, &build_l },
87 { NULL, 0, NULL, 0, NULL }
90 if ((prov = OSSL_PROVIDER_load(NULL, "foo")) != NULL
91 && OSSL_PROVIDER_get_params(prov, request))
92 printf("Provider 'foo' build %s\n", build);
94 ERR_print_errors_fp(stderr);
98 L<openssl-core.h(7)>, L<provider(7)>
102 The type and functions described here were added in OpenSSL 3.0.
106 Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
108 Licensed under the Apache License 2.0 (the "License"). You may not use
109 this file except in compliance with the License. You can obtain a copy
110 in the file LICENSE in the source distribution or at
111 L<https://www.openssl.org/source/license.html>.