docs: def finger_master(hash_type=None):
      '''
      Return the fingerprint of the master's public key
  
      hash_type
          The hash algorithm used to calculate the fingerprint
  
      .. code-block:: python
  
          >>> wheel.cmd('key.finger_master')
          {'local': {'master.pub': '5d:f6:79:43:5e:d4:42:3f:57:b8:45:a8:7e:a4:6e:ca'}}
      '''
      keyname = 'master.pub'
      if hash_type is None:
          hash_type = __opts__['hash_type']
  
      fingerprint = salt.utils.crypt.pem_finger(
          os.path.join(__opts__['pki_dir'], keyname), sum_type=hash_type)
      return {'local': {keyname: fingerprint}}