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 null  | 
      
| n_input | 
           length of the data to verify  | 
      
| n_signature | 
           length of the signature  | 
      
Returns:
| 
           true if the data verified correctly, otherwise a failure or error occurred.  |