Wrap a key into a byte stream.
This call will return immediately and complete asynchronously.
| this |
The session to use. |
| wrapper |
The key to use for wrapping. |
| mechanism |
The mechanism to use for wrapping. |
| wrapped |
The key to wrap. |
| cancellable |
Optional cancellation object or null. |
| callback |
Called when the operation completes. |
| user_data |
Data to pass to the callback. |