1/*
2 * Copyright 2017-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#include <folly/ssl/Init.h>
17
18#include <mutex>
19
20#include <folly/portability/OpenSSL.h>
21#include <folly/ssl/detail/OpenSSLThreading.h>
22#include <glog/logging.h>
23
24namespace folly {
25namespace ssl {
26
27namespace {
28bool initialized_ = false;
29
30std::mutex& initMutex() {
31 static std::mutex m;
32 return m;
33}
34
35void initializeOpenSSLLocked() {
36 if (initialized_) {
37 return;
38 }
39 OPENSSL_init_ssl(0, nullptr);
40 randomize();
41 initialized_ = true;
42}
43
44void cleanupOpenSSLLocked() {
45 if (!initialized_) {
46 return;
47 }
48
49 OPENSSL_cleanup();
50 initialized_ = false;
51}
52} // namespace
53
54void init() {
55 std::lock_guard<std::mutex> g(initMutex());
56 initializeOpenSSLLocked();
57}
58
59void cleanup() {
60 std::lock_guard<std::mutex> g(initMutex());
61 cleanupOpenSSLLocked();
62}
63
64void markInitialized() {
65 std::lock_guard<std::mutex> g(initMutex());
66 initialized_ = true;
67}
68
69void setLockTypesAndInit(LockTypeMapping inLockTypes) {
70 std::lock_guard<std::mutex> g(initMutex());
71 CHECK(!initialized_) << "OpenSSL is already initialized";
72 detail::setLockTypes(std::move(inLockTypes));
73 initializeOpenSSLLocked();
74}
75
76void setLockTypes(LockTypeMapping inLockTypes) {
77 std::lock_guard<std::mutex> g(initMutex());
78 if (initialized_) {
79 // We set the locks on initialization, so if we are already initialized
80 // this would have no affect.
81 LOG(INFO) << "Ignoring setSSLLockTypes after initialization";
82 return;
83 }
84 detail::setLockTypes(std::move(inLockTypes));
85}
86
87void randomize() {
88 RAND_poll();
89}
90
91bool isLockDisabled(int lockId) {
92 return detail::isSSLLockDisabled(lockId);
93}
94
95} // namespace ssl
96} // namespace folly
97