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Refactor YubiKey key to avoid deadlock

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- Add mutex to get m_connectedKeys
- Fix deadlock when the app uses Quick Unlock and the YubiKey is unplugged
This commit is contained in:
w15dev 2025-01-29 02:23:15 +03:00 committed by Jonathan White
parent 5ee5e4998a
commit 81fa8d5947
2 changed files with 15 additions and 3 deletions
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16
src/keys/drivers/YubiKey.cpp
View File

@ -75,11 +75,19 @@ bool YubiKey::findValidKeys()
{
QMutexLocker lock(&s_interfaceMutex);
findValidKeys(lock);
return !m_usbKeys.isEmpty() || !m_pcscKeys.isEmpty();
}
void YubiKey::findValidKeys(const QMutexLocker& locker)
{
// Check QMutexLocker since version 6.4
Q_UNUSED(locker);
m_connectedKeys = 0;
m_usbKeys = YubiKeyInterfaceUSB::instance()->findValidKeys(m_connectedKeys);
m_pcscKeys = YubiKeyInterfacePCSC::instance()->findValidKeys(m_connectedKeys);
return !m_usbKeys.isEmpty() || !m_pcscKeys.isEmpty();
}
void YubiKey::findValidKeysAsync()
@ -98,6 +106,8 @@ YubiKey::KeyMap YubiKey::foundKeys()
int YubiKey::connectedKeys()
{
QMutexLocker lock(&s_interfaceMutex);
return m_connectedKeys;
}
@ -171,7 +181,7 @@ YubiKey::challenge(YubiKeySlot slot, const QByteArray& challenge, Botan::secure_
// Make sure we tried to find available keys
if (m_usbKeys.isEmpty() && m_pcscKeys.isEmpty()) {
findValidKeys();
findValidKeys(lock);
}
if (m_usbKeys.contains(slot)) {

2
src/keys/drivers/YubiKey.h
View File

@ -84,6 +84,8 @@ signals:
private:
explicit YubiKey();
void findValidKeys(const QMutexLocker& locker);
static YubiKey* m_instance;
QTimer m_interactionTimer;