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/conf.h>
23 #include <openssl/engine.h>
24 #include <openssl/err.h>
25 #include <openssl/evp.h>
26 #include <openssl/objects.h>
27
28 #include "cryptlib.h"
29 #include "x509_issuer_cache.h"
30
31 int OpenSSL_config(const char *);
32 int OpenSSL_no_config(void);
33
34 static pthread_once_t crypto_init_once = PTHREAD_ONCE_INIT;
35 static pthread_t crypto_init_thread;
36 static int crypto_init_cleaned_up;
37
38 static void
OPENSSL_init_crypto_internal(void)39 OPENSSL_init_crypto_internal(void)
40 {
41 crypto_init_thread = pthread_self();
42
43 OPENSSL_cpuid_setup();
44 ERR_load_crypto_strings();
45 OpenSSL_add_all_ciphers();
46 OpenSSL_add_all_digests();
47 }
48
49 int
OPENSSL_init_crypto(uint64_t opts,const void * settings)50 OPENSSL_init_crypto(uint64_t opts, const void *settings)
51 {
52 if (crypto_init_cleaned_up) {
53 CRYPTOerror(ERR_R_INIT_FAIL);
54 return 0;
55 }
56
57 if (pthread_equal(pthread_self(), crypto_init_thread))
58 return 1; /* don't recurse */
59
60 if (pthread_once(&crypto_init_once, OPENSSL_init_crypto_internal) != 0)
61 return 0;
62
63 if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG) &&
64 (OpenSSL_no_config() == 0))
65 return 0;
66
67 if ((opts & OPENSSL_INIT_LOAD_CONFIG) &&
68 (OpenSSL_config(NULL) == 0))
69 return 0;
70
71 return 1;
72 }
73
74 void
OPENSSL_cleanup(void)75 OPENSSL_cleanup(void)
76 {
77 /* This currently calls init... */
78 ERR_free_strings();
79
80 ENGINE_cleanup();
81 EVP_cleanup();
82 x509_issuer_cache_free();
83
84 crypto_init_cleaned_up = 1;
85 }
86