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,
  36                             const OSSL_PARAM params[])
  37 {
  38     const OSSL_PARAM *p;
  39
  40     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
  41     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Legacy Provider"))
  42         return 0;
  43     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
  44     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
  45         return 0;
  46     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
  47     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
  48         return 0;
  49
  50     return 1;
  51 }
  52
  53 static const OSSL_ALGORITHM legacy_digests[] = {
  54 #ifndef OPENSSL_NO_MD2
  55     { "MD2", "legacy=yes", md2_functions },
  56 #endif
  57
  58 #ifndef OPENSSL_NO_MD4
  59     { "MD4", "legacy=yes", md4_functions },
  60 #endif
  61
  62 #ifndef OPENSSL_NO_MDC2
  63     { "MDC2", "legacy=yes", mdc2_functions },
  64 #endif /* OPENSSL_NO_MDC2 */
  65
  66 #ifndef OPENSSL_NO_WHIRLPOOL
  67     { "whirlpool", "legacy=yes", wp_functions },
  68 #endif /* OPENSSL_NO_WHIRLPOOL */
  69
  70 #ifndef OPENSSL_NO_RMD160
  71     { "RIPEMD160", "legacy=yes", ripemd160_functions },
  72 #endif /* OPENSSL_NO_RMD160 */
  73
  74     { NULL, NULL, NULL }
  75 };
  76
  77 static const OSSL_ALGORITHM *legacy_query(OSSL_PROVIDER *prov,
  78                                           int operation_id,
  79                                           int *no_cache)
  80 {
  81     *no_cache = 0;
  82     switch (operation_id) {
  83     case OSSL_OP_DIGEST:
  84         return legacy_digests;
  85     }
  86     return NULL;
  87 }
  88
  89 /* Functions we provide to the core */
  90 static const OSSL_DISPATCH legacy_dispatch_table[] = {
  91     { OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))legacy_get_param_types },
  92     { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))legacy_get_params },
  93     { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))legacy_query },
  94     { 0, NULL }
  95 };
  96
  97 int OSSL_provider_init(const OSSL_PROVIDER *provider,
  98                        const OSSL_DISPATCH *in,
  99                        const OSSL_DISPATCH **out,
 100                        void **provctx)
 101 {
 102     OSSL_core_get_library_context_fn *c_get_libctx = NULL;
 103
 104     for (; in->function_id != 0; in++) {
 105         switch (in->function_id) {
 106         case OSSL_FUNC_CORE_GET_PARAM_TYPES:
 107             c_get_param_types = OSSL_get_core_get_param_types(in);
 108             break;
 109         case OSSL_FUNC_CORE_GET_PARAMS:
 110             c_get_params = OSSL_get_core_get_params(in);
 111             break;
 112         case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
 113             c_get_libctx = OSSL_get_core_get_library_context(in);
 114             break;
 115         /* Just ignore anything we don't understand */
 116         default:
 117             break;
 118         }
 119     }
 120
 121     if (c_get_libctx == NULL)
 122         return 0;
 123
 124     *out = legacy_dispatch_table;
 125
 126     /*
 127      * We want to make sure that all calls from this provider that requires
 128      * a library context use the same context as the one used to call our
 129      * functions.  We do that by passing it along as the provider context.
 130      */
 131     *provctx = c_get_libctx(provider);
 132     return 1;
 133 }