lib/libssl/ssl_init.c

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