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);
  39         ossl_provider_free(prov);
  40         return NULL;
  41     }
  42
  43     return actual;
  44 }
  45
  46 OSSL_PROVIDER *OSSL_PROVIDER_load(OSSL_LIB_CTX *libctx, const char *name)
  47 {
  48     /* Any attempt to load a provider disables auto-loading of defaults */
  49     if (ossl_provider_disable_fallback_loading(libctx))
  50         return OSSL_PROVIDER_try_load(libctx, name, 0);
  51     return NULL;
  52 }
  53
  54 int OSSL_PROVIDER_unload(OSSL_PROVIDER *prov)
  55 {
  56     if (!ossl_provider_deactivate(prov))
  57         return 0;
  58     ossl_provider_free(prov);
  59     return 1;
  60 }
  61
  62 const OSSL_PARAM *OSSL_PROVIDER_gettable_params(const OSSL_PROVIDER *prov)
  63 {
  64     return ossl_provider_gettable_params(prov);
  65 }
  66
  67 int OSSL_PROVIDER_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
  68 {
  69     return ossl_provider_get_params(prov, params);
  70 }
  71
  72 const OSSL_ALGORITHM *OSSL_PROVIDER_query_operation(const OSSL_PROVIDER *prov,
  73                                                     int operation_id,
  74                                                     int *no_cache)
  75 {
  76     return ossl_provider_query_operation(prov, operation_id, no_cache);
  77 }
  78
  79 void OSSL_PROVIDER_unquery_operation(const OSSL_PROVIDER *prov,
  80                                      int operation_id,
  81                                      const OSSL_ALGORITHM *algs)
  82 {
  83     ossl_provider_unquery_operation(prov, operation_id, algs);
  84 }
  85
  86 void *OSSL_PROVIDER_get0_provider_ctx(const OSSL_PROVIDER *prov)
  87 {
  88     return ossl_provider_prov_ctx(prov);
  89 }
  90
  91 const OSSL_DISPATCH *OSSL_PROVIDER_get0_dispatch(const OSSL_PROVIDER *prov)
  92 {
  93     return ossl_provider_get0_dispatch(prov);
  94 }
  95
  96 int OSSL_PROVIDER_self_test(const OSSL_PROVIDER *prov)
  97 {
  98     return ossl_provider_self_test(prov);
  99 }
 100
 101 int OSSL_PROVIDER_get_capabilities(const OSSL_PROVIDER *prov,
 102                                    const char *capability,
 103                                    OSSL_CALLBACK *cb,
 104                                    void *arg)
 105 {
 106     return ossl_provider_get_capabilities(prov, capability, cb, arg);
 107 }
 108
 109 int OSSL_PROVIDER_add_builtin(OSSL_LIB_CTX *libctx, const char *name,
 110                               OSSL_provider_init_fn *init_fn)
 111 {
 112     OSSL_PROVIDER_INFO entry;
 113
 114     if (name == NULL || init_fn == NULL) {
 115         ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
 116         return 0;
 117     }
 118     memset(&entry, 0, sizeof(entry));
 119     entry.name = OPENSSL_strdup(name);
 120     if (entry.name == NULL) {
 121         ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
 122         return 0;
 123     }
 124     entry.init = init_fn;
 125     if (!ossl_provider_info_add_to_store(libctx, &entry)) {
 126         ossl_provider_info_clear(&entry);
 127         return 0;
 128     }
 129     return 1;
 130 }
 131
 132 const char *OSSL_PROVIDER_get0_name(const OSSL_PROVIDER *prov)
 133 {
 134     return ossl_provider_name(prov);
 135 }
 136
 137 int OSSL_PROVIDER_do_all(OSSL_LIB_CTX *ctx,
 138                          int (*cb)(OSSL_PROVIDER *provider,
 139                                    void *cbdata),
 140                          void *cbdata)
 141 {
 142     return ossl_provider_doall_activated(ctx, cb, cbdata);
 143 }