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