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Fix crash in OpenSSL usage.

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First try to activate Qt OpenSSL usage and let Qt to set
the locking methods for OpenSSL. Only if Qt didn't set them
we use our own locking methods. Before that we were always
setting our own locking methods and Qt was overriding them
at some random moment of time sometimes leading to a crash.
This commit is contained in:
John Preston 2017-02-15 21:23:47 +03:00
parent 25f90b5159
commit 902dee0c2a
1 changed files with 25 additions and 13 deletions
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38
Telegram/SourceFiles/core/utils.cpp
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@ -151,7 +151,7 @@ struct CRYPTO_dynlock_value {
namespace {
bool _sslInited = false;
QMutex *_sslLocks = 0;
QMutex *_sslLocks = nullptr;
void _sslLockingCallback(int mode, int type, const char *file, int line) {
if (!_sslLocks) return; // not inited
@ -271,17 +271,30 @@ namespace ThirdParty {
}
}
int32 numLocks = CRYPTO_num_locks();
if (numLocks) {
_sslLocks = new QMutex[numLocks];
CRYPTO_set_locking_callback(_sslLockingCallback);
} else {
LOG(("MTP Error: Could not init OpenSSL threads, CRYPTO_num_locks() returned zero!"));
// Force OpenSSL loading if it is linked in Qt,
// so that we won't mess with our OpenSSL locking with Qt OpenSSL locking.
auto sslSupported = QSslSocket::supportsSsl();
if (!sslSupported) {
LOG(("Error: current Qt build doesn't support SSL requests."));
}
if (!CRYPTO_get_locking_callback()) {
// Qt didn't initialize OpenSSL, so we will.
auto numLocks = CRYPTO_num_locks();
if (numLocks) {
_sslLocks = new QMutex[numLocks];
CRYPTO_set_locking_callback(_sslLockingCallback);
} else {
LOG(("MTP Error: Could not init OpenSSL threads, CRYPTO_num_locks() returned zero!"));
}
CRYPTO_THREADID_set_callback(_sslThreadId);
}
if (!CRYPTO_get_dynlock_create_callback()) {
CRYPTO_set_dynlock_create_callback(_sslCreateFunction);
CRYPTO_set_dynlock_lock_callback(_sslLockFunction);
CRYPTO_set_dynlock_destroy_callback(_sslDestroyFunction);
} else if (!CRYPTO_get_dynlock_lock_callback()) {
LOG(("MTP Error: dynlock_create callback is set without dynlock_lock callback!"));
}
CRYPTO_THREADID_set_callback(_sslThreadId);
CRYPTO_set_dynlock_create_callback(_sslCreateFunction);
CRYPTO_set_dynlock_lock_callback(_sslLockFunction);
CRYPTO_set_dynlock_destroy_callback(_sslDestroyFunction);
av_register_all();
avcodec_register_all();
@ -303,8 +316,7 @@ namespace ThirdParty {
ERR_remove_thread_state(nullptr);
EVP_cleanup();
delete[] _sslLocks;
_sslLocks = nullptr;
delete[] base::take(_sslLocks);
Platform::ThirdParty::finish();
}