lib/tls/openssl/lws-gencrypto.c

   1 /*
   2  * libwebsockets - generic crypto api hiding the backend
   3  *
   4  * Copyright (C) 2017 - 2018 Andy Green <andy@warmcat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Lesser General Public
   8  *  License as published by the Free Software Foundation:
   9  *  version 2.1 of the License.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Lesser General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Lesser General Public
  17  *  License along with this library; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  19  *  MA  02110-1301  USA
  20  *
  21  *  lws-gencrypto openssl-specific common code
  22  */
  23
  24 #include "private-lib-core.h"
  25 #include "private-lib-tls-openssl.h"
  26
  27 /*
  28  * Care: many openssl apis return 1 for success.  These are translated to the
  29  * lws convention of 0 for success.
  30  */
  31
  32 int
  33 lws_gencrypto_openssl_hash_to_NID(enum lws_genhash_types hash_type)
  34 {
  35         int h = -1;
  36
  37         switch (hash_type) {
  38         case LWS_GENHASH_TYPE_UNKNOWN:
  39                 break;
  40         case LWS_GENHASH_TYPE_MD5:
  41                 h = NID_md5;
  42                 break;
  43         case LWS_GENHASH_TYPE_SHA1:
  44                 h = NID_sha1;
  45                 break;
  46         case LWS_GENHASH_TYPE_SHA256:
  47                 h = NID_sha256;
  48                 break;
  49         case LWS_GENHASH_TYPE_SHA384:
  50                 h = NID_sha384;
  51                 break;
  52         case LWS_GENHASH_TYPE_SHA512:
  53                 h = NID_sha512;
  54                 break;
  55         }
  56
  57         return h;
  58 }
  59
  60 const EVP_MD *
  61 lws_gencrypto_openssl_hash_to_EVP_MD(enum lws_genhash_types hash_type)
  62 {
  63         const EVP_MD *h = NULL;
  64
  65         switch (hash_type) {
  66         case LWS_GENHASH_TYPE_UNKNOWN:
  67                 break;
  68         case LWS_GENHASH_TYPE_MD5:
  69                 h = EVP_md5();
  70                 break;
  71         case LWS_GENHASH_TYPE_SHA1:
  72                 h = EVP_sha1();
  73                 break;
  74         case LWS_GENHASH_TYPE_SHA256:
  75                 h = EVP_sha256();
  76                 break;
  77         case LWS_GENHASH_TYPE_SHA384:
  78                 h = EVP_sha384();
  79                 break;
  80         case LWS_GENHASH_TYPE_SHA512:
  81                 h = EVP_sha512();
  82                 break;
  83         }
  84
  85         return h;
  86 }