apps/lib/app_provider.c

   1 /*
   2  * Copyright 2020-2021 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 "apps.h"
  11 #include <string.h>
  12 #include <openssl/err.h>
  13 #include <openssl/provider.h>
  14 #include <openssl/safestack.h>
  15
  16 DEFINE_STACK_OF(OSSL_PROVIDER)
  17
  18 /*
  19  * See comments in opt_verify for explanation of this.
  20  */
  21 enum prov_range { OPT_PROV_ENUM };
  22
  23 static STACK_OF(OSSL_PROVIDER) *app_providers = NULL;
  24
  25 static void provider_free(OSSL_PROVIDER *prov)
  26 {
  27     OSSL_PROVIDER_unload(prov);
  28 }
  29
  30 int app_provider_load(OSSL_LIB_CTX *libctx, const char *provider_name)
  31 {
  32     OSSL_PROVIDER *prov;
  33
  34     prov = OSSL_PROVIDER_load(libctx, provider_name);
  35     if (prov == NULL) {
  36         opt_printf_stderr("%s: unable to load provider %s\n"
  37                           "Hint: use -provider-path option or OPENSSL_MODULES environment variable.\n",
  38                           opt_getprog(), provider_name);
  39         ERR_print_errors(bio_err);
  40         return 0;
  41     }
  42     if (app_providers == NULL)
  43         app_providers = sk_OSSL_PROVIDER_new_null();
  44     if (app_providers == NULL
  45         || !sk_OSSL_PROVIDER_push(app_providers, prov)) {
  46         app_providers_cleanup();
  47         return 0;
  48     }
  49     return 1;
  50 }
  51
  52 void app_providers_cleanup(void)
  53 {
  54     sk_OSSL_PROVIDER_pop_free(app_providers, provider_free);
  55     app_providers = NULL;
  56 }
  57
  58 static int opt_provider_path(const char *path)
  59 {
  60     if (path != NULL && *path == '\0')
  61         path = NULL;
  62     return OSSL_PROVIDER_set_default_search_path(app_get0_libctx(), path);
  63 }
  64
  65 int opt_provider(int opt)
  66 {
  67     switch ((enum prov_range)opt) {
  68     case OPT_PROV__FIRST:
  69     case OPT_PROV__LAST:
  70         return 1;
  71     case OPT_PROV_PROVIDER:
  72         return app_provider_load(app_get0_libctx(), opt_arg());
  73     case OPT_PROV_PROVIDER_PATH:
  74         return opt_provider_path(opt_arg());
  75     case OPT_PROV_PROPQUERY:
  76         return app_set_propq(opt_arg());
  77     }
  78     return 0;
  79 }