1/*
2 * Copyright 2019-2021 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 <openssl/err.h>
12#include <openssl/cryptoerr.h>
13#include <openssl/provider.h>
14#include <openssl/core_names.h>
15#include "internal/provider.h"
16#include "provider_local.h"
17
18OSSL_PROVIDER *OSSL_PROVIDER_try_load(OSSL_LIB_CTX *libctx, const char *name,
19                                      int retain_fallbacks)
20{
21    OSSL_PROVIDER *prov = NULL, *actual;
22    int isnew = 0;
23
24    /* Find it or create it */
25    if ((prov = ossl_provider_find(libctx, name, 0)) == NULL) {
26        if ((prov = ossl_provider_new(libctx, name, NULL, 0)) == NULL)
27            return NULL;
28        isnew = 1;
29    }
30
31    if (!ossl_provider_activate(prov, 1, 0)) {
32        ossl_provider_free(prov);
33        return NULL;
34    }
35
36    actual = prov;
37    if (isnew && !ossl_provider_add_to_store(prov, &actual, retain_fallbacks)) {
38        ossl_provider_deactivate(prov, 1);
39        ossl_provider_free(prov);
40        return NULL;
41    }
42    if (actual != prov) {
43        if (!ossl_provider_activate(actual, 1, 0)) {
44            ossl_provider_free(actual);
45            return NULL;
46        }
47    }
48
49    return actual;
50}
51
52OSSL_PROVIDER *OSSL_PROVIDER_load(OSSL_LIB_CTX *libctx, const char *name)
53{
54    /* Any attempt to load a provider disables auto-loading of defaults */
55    if (ossl_provider_disable_fallback_loading(libctx))
56        return OSSL_PROVIDER_try_load(libctx, name, 0);
57    return NULL;
58}
59
60int OSSL_PROVIDER_unload(OSSL_PROVIDER *prov)
61{
62    if (!ossl_provider_deactivate(prov, 1))
63        return 0;
64    ossl_provider_free(prov);
65    return 1;
66}
67
68const OSSL_PARAM *OSSL_PROVIDER_gettable_params(const OSSL_PROVIDER *prov)
69{
70    return ossl_provider_gettable_params(prov);
71}
72
73int OSSL_PROVIDER_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
74{
75    return ossl_provider_get_params(prov, params);
76}
77
78const OSSL_ALGORITHM *OSSL_PROVIDER_query_operation(const OSSL_PROVIDER *prov,
79                                                    int operation_id,
80                                                    int *no_cache)
81{
82    return ossl_provider_query_operation(prov, operation_id, no_cache);
83}
84
85void OSSL_PROVIDER_unquery_operation(const OSSL_PROVIDER *prov,
86                                     int operation_id,
87                                     const OSSL_ALGORITHM *algs)
88{
89    ossl_provider_unquery_operation(prov, operation_id, algs);
90}
91
92void *OSSL_PROVIDER_get0_provider_ctx(const OSSL_PROVIDER *prov)
93{
94    return ossl_provider_prov_ctx(prov);
95}
96
97const OSSL_DISPATCH *OSSL_PROVIDER_get0_dispatch(const OSSL_PROVIDER *prov)
98{
99    return ossl_provider_get0_dispatch(prov);
100}
101
102int OSSL_PROVIDER_self_test(const OSSL_PROVIDER *prov)
103{
104    return ossl_provider_self_test(prov);
105}
106
107int OSSL_PROVIDER_get_capabilities(const OSSL_PROVIDER *prov,
108                                   const char *capability,
109                                   OSSL_CALLBACK *cb,
110                                   void *arg)
111{
112    return ossl_provider_get_capabilities(prov, capability, cb, arg);
113}
114
115int OSSL_PROVIDER_add_builtin(OSSL_LIB_CTX *libctx, const char *name,
116                              OSSL_provider_init_fn *init_fn)
117{
118    OSSL_PROVIDER_INFO entry;
119
120    if (name == NULL || init_fn == NULL) {
121        ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
122        return 0;
123    }
124    memset(&entry, 0, sizeof(entry));
125    entry.name = OPENSSL_strdup(name);
126    if (entry.name == NULL) {
127        ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
128        return 0;
129    }
130    entry.init = init_fn;
131    if (!ossl_provider_info_add_to_store(libctx, &entry)) {
132        ossl_provider_info_clear(&entry);
133        return 0;
134    }
135    return 1;
136}
137
138const char *OSSL_PROVIDER_get0_name(const OSSL_PROVIDER *prov)
139{
140    return ossl_provider_name(prov);
141}
142
143int OSSL_PROVIDER_do_all(OSSL_LIB_CTX *ctx,
144                         int (*cb)(OSSL_PROVIDER *provider,
145                                   void *cbdata),
146                         void *cbdata)
147{
148    return ossl_provider_doall_activated(ctx, cb, cbdata);
149}
150