QtKeychain is a Qt API to store passwords and other secret data securely. How the data is stored depends on the platform:
macOS: Passwords are stored in the macOS Keychain.
Linux/Unix: If running, GNOME Keyring is used, otherwise QtKeychain tries to use KWallet (via D-Bus), if available. Libsecret (common API for desktop-specific solutions) is also supported.
Windows: By default, the Windows Credential Store is used (requires Windows 7 or newer).
Pass -DUSE_CREDENTIAL_STORE=OFF to cmake to disable it. If disabled, QtKeychain uses the Windows API function
CryptProtectData
to encrypt the password with the user's logon credentials. The encrypted data is then persisted via QSettings.
Android and iOS: Passwords are stored in the Android keystore system and iOS keychain, respectively.
In unsupported environments QtKeychain will report an error. It will not store any data unencrypted unless explicitly requested (setInsecureFallback( true )).
QtKeychain 0.12 and newer supports Qt 5 and Qt 6 and requires a compiler with C++11 support. Older versions support Qt 4 and Qt 5.
QtKeychain is available under the Modified BSD License. See the file COPYING for details.