providers/legacy/legacyprov.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 <string.h>
  11 #include <stdio.h>
  12 #include <openssl/core.h>
  13 #include <openssl/core_numbers.h>
  14 #include <openssl/core_names.h>
  15 #include <openssl/params.h>
  16
  17 /* Functions provided by the core */
  18 static OSSL_core_get_param_types_fn *c_get_param_types = NULL;
  19 static OSSL_core_get_params_fn *c_get_params = NULL;
  20
  21 /* Parameters we provide to the core */
  22 static const OSSL_ITEM legacy_param_types[] = {
  23     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
  24     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
  25     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
  26     { 0, NULL }
  27 };
  28
  29 static const OSSL_ITEM *legacy_get_param_types(const OSSL_PROVIDER *prov)
  30 {
  31     return legacy_param_types;
  32 }
  33
  34 static int legacy_get_params(const OSSL_PROVIDER *prov,
  35                             const OSSL_PARAM params[])
  36 {
  37     const OSSL_PARAM *p;
  38
  39     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
  40     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Legacy Provider"))
  41         return 0;
  42     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
  43     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
  44         return 0;
  45     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
  46     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
  47         return 0;
  48
  49     return 1;
  50 }
  51
  52 extern const OSSL_DISPATCH md2_functions[];
  53
  54 static const OSSL_ALGORITHM legacy_digests[] = {
  55 #ifndef OPENSSL_NO_MD2
  56     { "MD2", "legacy=yes", md2_functions },
  57 #endif
  58     { NULL, NULL, NULL }
  59 };
  60
  61 static const OSSL_ALGORITHM *legacy_query(OSSL_PROVIDER *prov,
  62                                           int operation_id,
  63                                           int *no_cache)
  64 {
  65     *no_cache = 0;
  66     switch (operation_id) {
  67     case OSSL_OP_DIGEST:
  68         return legacy_digests;
  69     }
  70     return NULL;
  71 }
  72
  73 /* Functions we provide to the core */
  74 static const OSSL_DISPATCH legacy_dispatch_table[] = {
  75     { OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))legacy_get_param_types },
  76     { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))legacy_get_params },
  77     { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))legacy_query },
  78     { 0, NULL }
  79 };
  80
  81 int OSSL_provider_init(const OSSL_PROVIDER *provider,
  82                        const OSSL_DISPATCH *in,
  83                        const OSSL_DISPATCH **out)
  84 {
  85     for (; in->function_id != 0; in++) {
  86         switch (in->function_id) {
  87         case OSSL_FUNC_CORE_GET_PARAM_TYPES:
  88             c_get_param_types = OSSL_get_core_get_param_types(in);
  89             break;
  90         case OSSL_FUNC_CORE_GET_PARAMS:
  91             c_get_params = OSSL_get_core_get_params(in);
  92             break;
  93         /* Just ignore anything we don't understand */
  94         default:
  95             break;
  96         }
  97     }
  98
  99     *out = legacy_dispatch_table;
 100     return 1;
 101 }