crypto/provider.c

   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
  18 OSSL_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
  52 OSSL_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
  60 int 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
  68 const OSSL_PARAM *OSSL_PROVIDER_gettable_params(const OSSL_PROVIDER *prov)
  69 {
  70     return ossl_provider_gettable_params(prov);
  71 }
  72
  73 int OSSL_PROVIDER_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
  74 {
  75     return ossl_provider_get_params(prov, params);
  76 }
  77
  78 const 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
  85 void 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
  92 void *OSSL_PROVIDER_get0_provider_ctx(const OSSL_PROVIDER *prov)
  93 {
  94     return ossl_provider_prov_ctx(prov);
  95 }
  96
  97 const OSSL_DISPATCH *OSSL_PROVIDER_get0_dispatch(const OSSL_PROVIDER *prov)
  98 {
  99     return ossl_provider_get0_dispatch(prov);
 100 }
 101
 102 int OSSL_PROVIDER_self_test(const OSSL_PROVIDER *prov)
 103 {
 104     return ossl_provider_self_test(prov);
 105 }
 106
 107 int 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
 115 int 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         return 0;
 128     entry.init = init_fn;
 129     if (!ossl_provider_info_add_to_store(libctx, &entry)) {
 130         ossl_provider_info_clear(&entry);
 131         return 0;
 132     }
 133     return 1;
 134 }
 135
 136 const char *OSSL_PROVIDER_get0_name(const OSSL_PROVIDER *prov)
 137 {
 138     return ossl_provider_name(prov);
 139 }
 140
 141 int OSSL_PROVIDER_do_all(OSSL_LIB_CTX *ctx,
 142                          int (*cb)(OSSL_PROVIDER *provider,
 143                                    void *cbdata),
 144                          void *cbdata)
 145 {
 146     return ossl_provider_doall_activated(ctx, cb, cbdata);
 147 }