crypto/evp/dh_support.c

   1 /*
   2  * Copyright 2020 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> /* strcmp */
  11 #include <openssl/dh.h>
  12 #include "internal/nelem.h"
  13 #include "crypto/dh.h"
  14
  15 typedef struct dh_name2id_st{
  16     const char *name;
  17     int id;
  18 } DH_GENTYPE_NAME2ID;
  19
  20 static const DH_GENTYPE_NAME2ID dhtype2id[]=
  21 {
  22     { "fips186_4", DH_PARAMGEN_TYPE_FIPS_186_4 },
  23     { "fips186_2", DH_PARAMGEN_TYPE_FIPS_186_2 },
  24     { "group", DH_PARAMGEN_TYPE_GROUP },
  25     { "generator", DH_PARAMGEN_TYPE_GENERATOR }
  26 };
  27
  28 const char *dh_gen_type_id2name(int id)
  29 {
  30     size_t i;
  31
  32     for (i = 0; i < OSSL_NELEM(dhtype2id); ++i) {
  33         if (dhtype2id[i].id == id)
  34             return dhtype2id[i].name;
  35     }
  36     return NULL;
  37 }
  38
  39 int dh_gen_type_name2id(const char *name)
  40 {
  41     size_t i;
  42
  43     for (i = 0; i < OSSL_NELEM(dhtype2id); ++i) {
  44         if (strcmp(dhtype2id[i].name, name) == 0)
  45             return dhtype2id[i].id;
  46     }
  47     return -1;
  48 }