providers/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 "prov/implementations.h"
  17
  18 #ifdef STATIC_LEGACY
  19 OSSL_provider_init_fn ossl_legacy_provider_init;
  20 # define OSSL_provider_init ossl_legacy_provider_init
  21 #endif
  22
  23 /* Functions provided by the core */
  24 static OSSL_core_gettable_params_fn *c_gettable_params = NULL;
  25 static OSSL_core_get_params_fn *c_get_params = NULL;
  26
  27 /* Parameters we provide to the core */
  28 static const OSSL_ITEM legacy_param_types[] = {
  29     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
  30     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
  31     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
  32     { 0, NULL }
  33 };
  34
  35 static const OSSL_ITEM *legacy_gettable_params(const OSSL_PROVIDER *prov)
  36 {
  37     return legacy_param_types;
  38 }
  39
  40 static int legacy_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
  41 {
  42     OSSL_PARAM *p;
  43
  44     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
  45     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Legacy Provider"))
  46         return 0;
  47     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
  48     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
  49         return 0;
  50     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
  51     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
  52         return 0;
  53
  54     return 1;
  55 }
  56
  57 static const OSSL_ALGORITHM legacy_digests[] = {
  58 #ifndef OPENSSL_NO_MD2
  59     { "MD2", "provider=legacy", md2_functions },
  60 #endif
  61
  62 #ifndef OPENSSL_NO_MD4
  63     { "MD4", "provider=legacy", md4_functions },
  64 #endif
  65
  66 #ifndef OPENSSL_NO_MDC2
  67     { "MDC2", "provider=legacy", mdc2_functions },
  68 #endif /* OPENSSL_NO_MDC2 */
  69
  70 #ifndef OPENSSL_NO_WHIRLPOOL
  71     { "WHIRLPOOL", "provider=legacy", wp_functions },
  72 #endif /* OPENSSL_NO_WHIRLPOOL */
  73
  74 #ifndef OPENSSL_NO_RMD160
  75     { "RIPEMD-160:RIPEMD160:RIPEMD:RMD160", "provider=legacy", ripemd160_functions },
  76 #endif /* OPENSSL_NO_RMD160 */
  77
  78     { NULL, NULL, NULL }
  79 };
  80
  81 static const OSSL_ALGORITHM *legacy_query(OSSL_PROVIDER *prov,
  82                                           int operation_id,
  83                                           int *no_cache)
  84 {
  85     *no_cache = 0;
  86     switch (operation_id) {
  87     case OSSL_OP_DIGEST:
  88         return legacy_digests;
  89     }
  90     return NULL;
  91 }
  92
  93 /* Functions we provide to the core */
  94 static const OSSL_DISPATCH legacy_dispatch_table[] = {
  95     { OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))legacy_gettable_params },
  96     { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))legacy_get_params },
  97     { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))legacy_query },
  98     { 0, NULL }
  99 };
 100
 101 int OSSL_provider_init(const OSSL_PROVIDER *provider,
 102                        const OSSL_DISPATCH *in,
 103                        const OSSL_DISPATCH **out,
 104                        void **provctx)
 105 {
 106     OSSL_core_get_library_context_fn *c_get_libctx = NULL;
 107
 108     for (; in->function_id != 0; in++) {
 109         switch (in->function_id) {
 110         case OSSL_FUNC_CORE_GETTABLE_PARAMS:
 111             c_gettable_params = OSSL_get_core_gettable_params(in);
 112             break;
 113         case OSSL_FUNC_CORE_GET_PARAMS:
 114             c_get_params = OSSL_get_core_get_params(in);
 115             break;
 116         case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
 117             c_get_libctx = OSSL_get_core_get_library_context(in);
 118             break;
 119         /* Just ignore anything we don't understand */
 120         default:
 121             break;
 122         }
 123     }
 124
 125     if (c_get_libctx == NULL)
 126         return 0;
 127
 128     *out = legacy_dispatch_table;
 129
 130     /*
 131      * We want to make sure that all calls from this provider that requires
 132      * a library context use the same context as the one used to call our
 133      * functions.  We do that by passing it along as the provider context.
 134      */
 135     *provctx = c_get_libctx(provider);
 136     return 1;
 137 }