verify
Description:
public bool verify (Object key, ulong mech_type, uint8[] input, uint8[] signature, Cancellable? cancellable = null) throws Error
  
  Verify data in a mechanism specific manner.
This call may block for an indefinite period.
Parameters:
| this | The session. | 
| key | The key to verify with. | 
| mech_type | The mechanism type to use for verifying. | 
| input | data to verify | 
| signature | the signature | 
| cancellable | Optional cancellation object, or  | 
| n_input | length of the data to verify | 
| n_signature | length of the signature | 
Returns:
| 
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