gost_prov.c

   1 #include <string.h>
   2 #include <stdio.h>
   3 #include <openssl/core.h>
   4 #include <openssl/core_numbers.h>
   5 #include <openssl/core_names.h>
   6 #include <openssl/params.h>
   7
   8 #define GOST_PROV_VERSION_STR "3.0.0"
   9 #define GOST_PROV_FULL_VERSION_STR "3.0.0"
  10
  11 /* Functions provided by the core */
  12 static OSSL_core_gettable_params_fn *c_gettable_params = NULL;
  13 static OSSL_core_get_params_fn *c_get_params = NULL;
  14
  15 /* Parameters we provide to the core */
  16 static const OSSL_ITEM gost_param_types[] = {
  17     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
  18     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
  19     { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
  20     { 0, NULL }
  21 };
  22
  23 static const OSSL_ITEM *gost_gettable_params(const OSSL_PROVIDER *prov)
  24 {
  25     return gost_param_types;
  26 }
  27
  28 static int gost_get_params(const OSSL_PROVIDER *prov, OSSL_PARAM params[])
  29 {
  30     OSSL_PARAM *p;
  31
  32     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
  33     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "GOST Provider"))
  34         return 0;
  35     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
  36     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, GOST_PROV_VERSION_STR))
  37         return 0;
  38     p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
  39     if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, GOST_PROV_FULL_VERSION_STR))
  40         return 0;
  41
  42     return 1;
  43 }
  44
  45 static const OSSL_ALGORITHM gost_digests[] = {
  46     { "md_gost94", "gost.legacy=yes", NULL }, /* FIXME */
  47                 { "md_gost2012_256:streebog256", "gost.gost=yes", NULL },
  48                 { "md_gost2012_512:streebog512", "gost.gost=yes", NULL },
  49
  50     { NULL, NULL, NULL }
  51 };
  52
  53 static const OSSL_ALGORITHM *gost_query(OSSL_PROVIDER *prov,
  54                                           int operation_id,
  55                                           int *no_cache)
  56 {
  57     *no_cache = 0;
  58     switch (operation_id) {
  59     case OSSL_OP_DIGEST:
  60         return gost_digests;
  61     }
  62     return NULL;
  63 }
  64
  65 /* Functions we provide to the core */
  66 static const OSSL_DISPATCH gost_dispatch_table[] = {
  67     { OSSL_FUNC_PROVIDER_GETTABLE_PARAMS, (void (*)(void))gost_gettable_params },
  68     { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))gost_get_params },
  69     { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))gost_query },
  70     { 0, NULL }
  71 };
  72
  73 int OSSL_provider_init(const OSSL_PROVIDER *provider,
  74                        const OSSL_DISPATCH *in,
  75                        const OSSL_DISPATCH **out,
  76                        void **provctx)
  77 {
  78     OSSL_core_get_library_context_fn *c_get_libctx = NULL;
  79
  80     for (; in->function_id != 0; in++) {
  81         switch (in->function_id) {
  82         case OSSL_FUNC_CORE_GETTABLE_PARAMS:
  83             c_gettable_params = OSSL_get_core_gettable_params(in);
  84             break;
  85         case OSSL_FUNC_CORE_GET_PARAMS:
  86             c_get_params = OSSL_get_core_get_params(in);
  87             break;
  88         case OSSL_FUNC_CORE_GET_LIBRARY_CONTEXT:
  89             c_get_libctx = OSSL_get_core_get_library_context(in);
  90             break;
  91         /* Just ignore anything we don't understand */
  92         default:
  93             break;
  94         }
  95     }
  96
  97     if (c_get_libctx == NULL)
  98         return 0;
  99
 100     *out = gost_dispatch_table;
 101
 102     /*
 103      * We want to make sure that all calls from this provider that requires
 104      * a library context use the same context as the one used to call our
 105      * functions.  We do that by passing it along as the provider context.
 106      */
 107     *provctx = c_get_libctx(provider);
 108     return 1;
 109 }