lib/libcrypto/crypto_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 #include <openssl/conf.h>
  24 #include <openssl/evp.h>
  25 #include <openssl/err.h>
  26 #include "cryptlib.h"
  27
  28 int OpenSSL_config(const char *);
  29 int OpenSSL_no_config(void);
  30
  31 static pthread_t crypto_init_thread;
  32
  33 static void
  34 OPENSSL_init_crypto_internal(void)
  35 {
  36         crypto_init_thread = pthread_self();
  37         OPENSSL_cpuid_setup();
  38         ERR_load_crypto_strings();
  39         OpenSSL_add_all_ciphers();
  40         OpenSSL_add_all_digests();
  41 }
  42
  43 int
  44 OPENSSL_init_crypto(uint64_t opts, const void *settings)
  45 {
  46         static pthread_once_t once = PTHREAD_ONCE_INIT;
  47
  48         if (pthread_equal(pthread_self(), crypto_init_thread))
  49                 return 1; /* don't recurse */
  50
  51         if (pthread_once(&once, OPENSSL_init_crypto_internal) != 0)
  52                 return 0;
  53
  54         if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG) &&
  55             (OpenSSL_no_config() == 0))
  56                 return 0;
  57
  58         if ((opts & OPENSSL_INIT_LOAD_CONFIG) &&
  59             (OpenSSL_config(NULL) == 0))
  60                 return 0;
  61
  62         return 1;
  63 }