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 #include "internal/provider_algs.h"
  17
  18 /* Functions provided by the core */
  19 static OSSL_core_get_param_types_fn *c_get_param_types = NULL;
  20 static OSSL_core_get_params_fn *c_get_params = NULL;
  21
  22 /* Parameters we provide to the core */
  23 static const OSSL_ITEM legacy_param_types[] = {
  24     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
  25     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
  26     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
  27     { 0, NULL }
  28 };
  29
  30 static const OSSL_ITEM *legacy_get_param_types(const OSSL_PROVIDER *prov)
  31 {
  32     return legacy_param_types;
  33 }
  34
  35 static int legacy_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
  36 {
  37     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 static const OSSL_ALGORITHM legacy_digests[] = {
  53 #ifndef OPENSSL_NO_MD2
  54     { "MD2", "legacy=yes", md2_functions },
  55 #endif
  56
  57 #ifndef OPENSSL_NO_MD4
  58     { "MD4", "legacy=yes", md4_functions },
  59 #endif
  60
  61 #ifndef OPENSSL_NO_MDC2
  62     { "MDC2", "legacy=yes", mdc2_functions },
  63 #endif /* OPENSSL_NO_MDC2 */
  64
  65 #ifndef OPENSSL_NO_WHIRLPOOL
  66     { "whirlpool", "legacy=yes", wp_functions },
  67 #endif /* OPENSSL_NO_WHIRLPOOL */
  68
  69 #ifndef OPENSSL_NO_RMD160
  70     { "RIPEMD160", "legacy=yes", ripemd160_functions },
  71 #endif /* OPENSSL_NO_RMD160 */
  72
  73     { NULL, NULL, NULL }
  74 };
  75
  76 static const OSSL_ALGORITHM *legacy_query(OSSL_PROVIDER *prov,
  77                                           int operation_id,
  78                                           int *no_cache)
  79 {
  80     *no_cache = 0;
  81     switch (operation_id) {
  82     case OSSL_OP_DIGEST:
  83         return legacy_digests;
  84     }
  85     return NULL;
  86 }
  87
  88 /* Functions we provide to the core */
  89 static const OSSL_DISPATCH legacy_dispatch_table[] = {
  90     { OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))legacy_get_param_types },
  91     { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))legacy_get_params },
  92     { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))legacy_query },
  93     { 0, NULL }
  94 };
  95
  96 int OSSL_provider_init(const OSSL_PROVIDER *provider,
  97                        const OSSL_DISPATCH *in,
  98                        const OSSL_DISPATCH **out,
  99                        void **provctx)
 100 {
 101     OSSL_core_get_library_context_fn *c_get_libctx = NULL;
 102
 103     for (; in->function_id != 0; in++) {
 104         switch (in->function_id) {
 105         case OSSL_FUNC_CORE_GET_PARAM_TYPES:
 106             c_get_param_types = OSSL_get_core_get_param_types(in);
 107             break;
 108         case OSSL_FUNC_CORE_GET_PARAMS:
 109             c_get_params = OSSL_get_core_get_params(in);
 110             break;
 111         case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
 112             c_get_libctx = OSSL_get_core_get_library_context(in);
 113             break;
 114         /* Just ignore anything we don't understand */
 115         default:
 116             break;
 117         }
 118     }
 119
 120     if (c_get_libctx == NULL)
 121         return 0;
 122
 123     *out = legacy_dispatch_table;
 124
 125     /*
 126      * We want to make sure that all calls from this provider that requires
 127      * a library context use the same context as the one used to call our
 128      * functions.  We do that by passing it along as the provider context.
 129      */
 130     *provctx = c_get_libctx(provider);
 131     return 1;
 132 }