crypto/libressl/ssl/ssl_init.c

   1 /* $OpenBSD: ssl_init.c,v 1.2 2018/03/30 14:59:46 jsing Exp $ */
   2 /*
   3  * Copyright (c) 2018 Bob Beck <beck@openbsd.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* OpenSSL style init */
  19
  20 #include <pthread.h>
  21 #include <stdio.h>
  22
  23 #include <openssl/objects.h>
  24
  25 #include "ssl_locl.h"
  26
  27 static pthread_t ssl_init_thread;
  28
  29 static void
  30 OPENSSL_init_ssl_internal(void)
  31 {
  32         ssl_init_thread = pthread_self();
  33         SSL_load_error_strings();
  34         SSL_library_init();
  35 }
  36
  37 int
  38 OPENSSL_init_ssl(uint64_t opts, const void *settings)
  39 {
  40         static pthread_once_t once = PTHREAD_ONCE_INIT;
  41
  42         if (pthread_equal(pthread_self(), ssl_init_thread))
  43                 return 1; /* don't recurse */
  44
  45         OPENSSL_init_crypto(opts, settings);
  46
  47         if (pthread_once(&once, OPENSSL_init_ssl_internal) != 0)
  48                 return 0;
  49
  50         return 1;
  51 }