crypto/core_algorithm.c

   1 /*
   2  * Copyright 2019 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 <openssl/core.h>
  11 #include <openssl/core_numbers.h>
  12 #include "internal/core.h"
  13 #include "internal/property.h"
  14 #include "internal/provider.h"
  15
  16 struct algorithm_data_st {
  17     OPENSSL_CTX *libctx;
  18     int operation_id;            /* May be zero for finding them all */
  19     void (*fn)(OSSL_PROVIDER *, const OSSL_ALGORITHM *, int no_store,
  20                void *data);
  21     void *data;
  22 };
  23
  24 static int algorithm_do_this(OSSL_PROVIDER *provider, void *cbdata)
  25 {
  26     struct algorithm_data_st *data = cbdata;
  27     int no_store = 0;    /* Assume caching is ok */
  28     int first_operation = 1;
  29     int last_operation = OSSL_OP__HIGHEST;
  30     int cur_operation;
  31     int ok = 0;
  32
  33     if (data->operation_id != 0)
  34         first_operation = last_operation = data->operation_id;
  35
  36     for (cur_operation = first_operation;
  37          cur_operation <= last_operation;
  38          cur_operation++) {
  39         const OSSL_ALGORITHM *map =
  40             ossl_provider_query_operation(provider, data->operation_id,
  41                                           &no_store);
  42
  43         if (map == NULL)
  44             break;
  45
  46         ok = 1;                  /* As long as we've found *something* */
  47         while (map->algorithm_names != NULL) {
  48             const OSSL_ALGORITHM *thismap = map++;
  49
  50             data->fn(provider, thismap, no_store, data->data);
  51         }
  52     }
  53
  54     return ok;
  55 }
  56
  57 void ossl_algorithm_do_all(OPENSSL_CTX *libctx, int operation_id,
  58                            OSSL_PROVIDER *provider,
  59                            void (*fn)(OSSL_PROVIDER *provider,
  60                                       const OSSL_ALGORITHM *algo,
  61                                       int no_store, void *data),
  62                            void *data)
  63 {
  64     struct algorithm_data_st cbdata;
  65
  66     cbdata.libctx = libctx;
  67     cbdata.operation_id = operation_id;
  68     cbdata.fn = fn;
  69     cbdata.data = data;
  70
  71     if (provider == NULL)
  72         ossl_provider_forall_loaded(libctx, algorithm_do_this, &cbdata);
  73     else
  74         algorithm_do_this(provider, &cbdata);
  75 }