5 OSSL_PROVIDER_set_default_search_path,
6 OSSL_PROVIDER, OSSL_PROVIDER_load, OSSL_PROVIDER_unload,
7 OSSL_PROVIDER_available, OSSL_PROVIDER_do_all,
8 OSSL_PROVIDER_gettable_params, OSSL_PROVIDER_get_params,
9 OSSL_PROVIDER_add_builtin, OSSL_PROVIDER_name - provider routines
13 #include <openssl/provider.h>
15 typedef struct ossl_provider_st OSSL_PROVIDER;
17 void OSSL_PROVIDER_set_default_search_path(OPENSSL_CTX *libctx,
20 OSSL_PROVIDER *OSSL_PROVIDER_load(OPENSSL_CTX *libctx, const char *name);
21 int OSSL_PROVIDER_unload(OSSL_PROVIDER *prov);
22 int OSSL_PROVIDER_available(OPENSSL_CTX *libctx, const char *name);
23 int OSSL_PROVIDER_do_all(OPENSSL_CTX *ctx,
24 int (*cb)(OSSL_PROVIDER *provider, void *cbdata),
27 const OSSL_PARAM *OSSL_PROVIDER_gettable_params(OSSL_PROVIDER *prov);
28 int OSSL_PROVIDER_get_params(OSSL_PROVIDER *prov, OSSL_PARAM params[]);
30 int OSSL_PROVIDER_add_builtin(OPENSSL_CTX *libctx, const char *name,
31 ossl_provider_init_fn *init_fn);
33 const char *OSSL_PROVIDER_name(const OSSL_PROVIDER *prov);
37 B<OSSL_PROVIDER> is a type that holds internal information about
38 implementation providers (see L<provider(7)> for information on what a
40 A provider can be built in to the application or the OpenSSL
41 libraries, or can be a loadable module.
42 The functions described here handle both forms.
44 Some of these functions operate within a library context, please see
45 L<OPENSSL_CTX(3)> for further details.
49 OSSL_PROVIDER_set_default_search_path() specifies the default search B<path>
50 that is to be used for looking for providers in the specified B<libctx>.
51 If left unspecified, an environment variable and a fall back default value will
54 OSSL_PROVIDER_add_builtin() is used to add a built in provider to
55 B<OSSL_PROVIDER> store in the given library context, by associating a
56 provider name with a provider initialization function.
57 This name can then be used with OSSL_PROVIDER_load().
59 OSSL_PROVIDER_load() loads and initializes a provider.
60 This may simply initialize a provider that was previously added with
61 OSSL_PROVIDER_add_builtin() and run its given initialization function,
62 or load a provider module with the given name and run its provider
63 entry point, C<OSSL_provider_init>.
65 OSSL_PROVIDER_unload() unloads the given provider.
66 For a provider added with OSSL_PROVIDER_add_builtin(), this simply
67 runs its teardown function.
69 OSSL_PROVIDER_available() checks if a named provider is available
72 OSSL_PROVIDER_do_all() iterates over all loaded providers, calling
73 I<cb> for each one, with the current provider in I<provider> and the
74 I<cbdata> that comes from the caller.
76 OSSL_PROVIDER_gettable_params() is used to get a provider parameter
77 descriptor set as a constant B<OSSL_PARAM> array.
78 See L<OSSL_PARAM(3)> for more information.
80 OSSL_PROVIDER_get_params() is used to get provider parameter values.
81 The caller must prepare the B<OSSL_PARAM> array before calling this
82 function, and the variables acting as buffers for this parameter array
83 should be filled with data when it returns successfully.
85 OSSL_PROVIDER_name() returns the name of the given provider.
89 OSSL_PROVIDER_add() returns 1 on success, or 0 on error.
91 OSSL_PROVIDER_load() returns a pointer to a provider object on
92 success, or B<NULL> on error.
94 OSSL_PROVIDER_unload() returns 1 on success, or 0 on error.
96 OSSL_PROVIDER_available() returns 1 if the named provider is available,
99 OSSL_PROVIDER_gettable_params() returns a pointer to an array
100 of constant B<OSSL_PARAM>, or NULL if none is provided.
102 OSSL_PROVIDER_get_params() returns 1 on success, or 0 on error.
106 This demonstrates how to load the provider module "foo" and ask for
109 OSSL_PROVIDER *prov = NULL;
110 const char *build = NULL;
112 OSSL_PARAM request[] = {
113 { "build", OSSL_PARAM_UTF8_STRING_PTR, &build, 0, &build_l },
114 { NULL, 0, NULL, 0, NULL }
117 if ((prov = OSSL_PROVIDER_load(NULL, "foo")) != NULL
118 && OSSL_PROVIDER_get_params(prov, request))
119 printf("Provider 'foo' build %s\n", build);
121 ERR_print_errors_fp(stderr);
125 L<openssl-core.h(7)>, L<OPENSSL_CTX(3)>, L<provider(7)>
129 The type and functions described here were added in OpenSSL 3.0.
133 Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
135 Licensed under the Apache License 2.0 (the "License"). You may not use
136 this file except in compliance with the License. You can obtain a copy
137 in the file LICENSE in the source distribution or at
138 L<https://www.openssl.org/source/license.html>.