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
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
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
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