1 /*
2 * Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include "internal/e_os.h"
11
12 #include "internal/err.h"
13 #include <openssl/crypto.h>
14 #include <openssl/evp.h>
15 #include <openssl/trace.h>
16 #include "ssl_local.h"
17 #include "sslerr.h"
18 #include "internal/thread_once.h"
19
20 static int stopped;
21
22 static void ssl_library_stop(void);
23
24 static CRYPTO_ONCE ssl_base = CRYPTO_ONCE_STATIC_INIT;
25 static int ssl_base_inited = 0;
DEFINE_RUN_ONCE_STATIC(ossl_init_ssl_base)26 DEFINE_RUN_ONCE_STATIC(ossl_init_ssl_base)
27 {
28 #ifndef OPENSSL_NO_COMP
29 OSSL_TRACE(INIT, "ossl_init_ssl_base: "
30 "SSL_COMP_get_compression_methods()\n");
31 /*
32 * This will initialise the built-in compression algorithms. The value
33 * returned is a STACK_OF(SSL_COMP), but that can be discarded safely
34 */
35 SSL_COMP_get_compression_methods();
36 #endif
37 ssl_sort_cipher_list();
38 OSSL_TRACE(INIT, "ossl_init_ssl_base: SSL_add_ssl_module()\n");
39 /*
40 * We ignore an error return here. Not much we can do - but not that bad
41 * either. We can still safely continue.
42 */
43 OPENSSL_atexit(ssl_library_stop);
44 ssl_base_inited = 1;
45 return 1;
46 }
47
48 static CRYPTO_ONCE ssl_strings = CRYPTO_ONCE_STATIC_INIT;
49
DEFINE_RUN_ONCE_STATIC(ossl_init_load_ssl_strings)50 DEFINE_RUN_ONCE_STATIC(ossl_init_load_ssl_strings)
51 {
52 /*
53 * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
54 * pulling in all the error strings during static linking
55 */
56 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
57 OSSL_TRACE(INIT, "ossl_init_load_ssl_strings: ossl_err_load_SSL_strings()\n");
58 ossl_err_load_SSL_strings();
59 #endif
60 return 1;
61 }
62
DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_ssl_strings,ossl_init_load_ssl_strings)63 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_ssl_strings,
64 ossl_init_load_ssl_strings)
65 {
66 /* Do nothing in this case */
67 return 1;
68 }
69
ssl_library_stop(void)70 static void ssl_library_stop(void)
71 {
72 /* Might be explicitly called and also by atexit */
73 if (stopped)
74 return;
75 stopped = 1;
76
77 if (ssl_base_inited) {
78 #ifndef OPENSSL_NO_COMP
79 OSSL_TRACE(INIT, "ssl_library_stop: "
80 "ssl_comp_free_compression_methods_int()\n");
81 ssl_comp_free_compression_methods_int();
82 #endif
83 }
84 }
85
86 /*
87 * If this function is called with a non NULL settings value then it must be
88 * called prior to any threads making calls to any OpenSSL functions,
89 * i.e. passing a non-null settings value is assumed to be single-threaded.
90 */
OPENSSL_init_ssl(uint64_t opts,const OPENSSL_INIT_SETTINGS * settings)91 int OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS * settings)
92 {
93 static int stoperrset = 0;
94
95 if (stopped) {
96 if (!stoperrset) {
97 /*
98 * We only ever set this once to avoid getting into an infinite
99 * loop where the error system keeps trying to init and fails so
100 * sets an error etc
101 */
102 stoperrset = 1;
103 ERR_raise(ERR_LIB_SSL, ERR_R_INIT_FAIL);
104 }
105 return 0;
106 }
107
108 opts |= OPENSSL_INIT_ADD_ALL_CIPHERS
109 | OPENSSL_INIT_ADD_ALL_DIGESTS;
110 #ifndef OPENSSL_NO_AUTOLOAD_CONFIG
111 if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG) == 0)
112 opts |= OPENSSL_INIT_LOAD_CONFIG;
113 #endif
114
115 if (!OPENSSL_init_crypto(opts, settings))
116 return 0;
117
118 if (!RUN_ONCE(&ssl_base, ossl_init_ssl_base))
119 return 0;
120
121 if ((opts & OPENSSL_INIT_NO_LOAD_SSL_STRINGS)
122 && !RUN_ONCE_ALT(&ssl_strings, ossl_init_no_load_ssl_strings,
123 ossl_init_load_ssl_strings))
124 return 0;
125
126 if ((opts & OPENSSL_INIT_LOAD_SSL_STRINGS)
127 && !RUN_ONCE(&ssl_strings, ossl_init_load_ssl_strings))
128 return 0;
129
130 return 1;
131 }
132
