5 OSSL_PROVIDER_set_default_search_path,
6 OSSL_PROVIDER, OSSL_PROVIDER_load, OSSL_PROVIDER_unload,
7 OSSL_PROVIDER_available,
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);
24 const OSSL_PARAM *OSSL_PROVIDER_gettable_params(OSSL_PROVIDER *prov);
25 int OSSL_PROVIDER_get_params(OSSL_PROVIDER *prov, OSSL_PARAM params[]);
27 int OSSL_PROVIDER_add_builtin(OPENSSL_CTX *libctx, const char *name,
28 ossl_provider_init_fn *init_fn);
30 const char *OSSL_PROVIDER_name(const OSSL_PROVIDER *prov);
34 B<OSSL_PROVIDER> is a type that holds internal information about
35 implementation providers (see L<provider(7)> for information on what a
37 A provider can be built in to the application or the OpenSSL
38 libraries, or can be a loadable module.
39 The functions described here handle both forms.
41 Some of these functions operate within a library context, please see
42 L<OPENSSL_CTX(3)> for further details.
46 OSSL_PROVIDER_set_default_search_path() specifies the default search B<path>
47 that is to be used for looking for providers in the specified B<libctx>.
48 If left unspecified, an environment variable and a fall back default value will
51 OSSL_PROVIDER_add_builtin() is used to add a built in provider to
52 B<OSSL_PROVIDER> store in the given library context, by associating a
53 provider name with a provider initialization function.
54 This name can then be used with OSSL_PROVIDER_load().
56 OSSL_PROVIDER_load() loads and initializes a provider.
57 This may simply initialize a provider that was previously added with
58 OSSL_PROVIDER_add_builtin() and run its given initialization function,
59 or load a provider module with the given name and run its provider
60 entry point, C<OSSL_provider_init>.
62 OSSL_PROVIDER_unload() unloads the given provider.
63 For a provider added with OSSL_PROVIDER_add_builtin(), this simply
64 runs its teardown function.
66 OSSL_PROVIDER_available() checks if a named provider is available
69 OSSL_PROVIDER_gettable_params() is used to get a provider parameter
70 descriptor set as a constant B<OSSL_PARAM> array.
71 See L<OSSL_PARAM(3)> for more information.
73 OSSL_PROVIDER_get_params() is used to get provider parameter values.
74 The caller must prepare the B<OSSL_PARAM> array before calling this
75 function, and the variables acting as buffers for this parameter array
76 should be filled with data when it returns successfully.
78 OSSL_PROVIDER_name() returns the name of the given provider.
82 OSSL_PROVIDER_add() returns 1 on success, or 0 on error.
84 OSSL_PROVIDER_load() returns a pointer to a provider object on
85 success, or B<NULL> on error.
87 OSSL_PROVIDER_unload() returns 1 on success, or 0 on error.
89 OSSL_PROVIDER_available() returns 1 if the named provider is available,
92 OSSL_PROVIDER_gettable_params() returns a pointer to an array
93 of constant B<OSSL_PARAM>, or NULL if none is provided.
95 OSSL_PROVIDER_get_params() returns 1 on success, or 0 on error.
99 This demonstrates how to load the provider module "foo" and ask for
102 OSSL_PROVIDER *prov = NULL;
103 const char *build = NULL;
105 OSSL_PARAM request[] = {
106 { "build", OSSL_PARAM_UTF8_STRING_PTR, &build, 0, &build_l },
107 { NULL, 0, NULL, 0, NULL }
110 if ((prov = OSSL_PROVIDER_load(NULL, "foo")) != NULL
111 && OSSL_PROVIDER_get_params(prov, request))
112 printf("Provider 'foo' build %s\n", build);
114 ERR_print_errors_fp(stderr);
118 L<openssl-core.h(7)>, L<OPENSSL_CTX(3)>, L<provider(7)>
122 The type and functions described here were added in OpenSSL 3.0.
126 Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
128 Licensed under the Apache License 2.0 (the "License"). You may not use
129 this file except in compliance with the License. You can obtain a copy
130 in the file LICENSE in the source distribution or at
131 L<https://www.openssl.org/source/license.html>.