def _unsign_data(self, data, options):
        '''Verify and remove signature'''

        if options['signature_algorithm_id'] not in self.signature_algorithms:
            raise Exception('Unknown signature algorithm id: %d'
                            % options['signature_algorithm_id'])

        signature_algorithm = \
            self.signature_algorithms[options['signature_algorithm_id']]

        algorithm = self._get_algorithm_info(signature_algorithm)

        key_salt = ''
        if algorithm['salt_size']:
            key_salt = data[-algorithm['salt_size']:]
            data = data[:-algorithm['salt_size']]

        key = self._generate_key(options['signature_passphrase_id'],
                            self.signature_passphrases, key_salt, algorithm)

        data = self._decode(data, algorithm, key)

        return data
def _unsign_data(self, data, options):
        '''Verify and remove signature'''

        if options['signature_algorithm_id'] not in self.signature_algorithms:
            raise Exception('Unknown signature algorithm id: %d'
                            % options['signature_algorithm_id'])

        signature_algorithm = \
            self.signature_algorithms[options['signature_algorithm_id']]

        algorithm = self._get_algorithm_info(signature_algorithm)

        key_salt = ''
        if algorithm['salt_size']:
            key_salt = data[-algorithm['salt_size']:]
            data = data[:-algorithm['salt_size']]

        key = self._generate_key(options['signature_passphrase_id'],
                            self.signature_passphrases, key_salt, algorithm)

        data = self._decode(data, algorithm, key)

        return data
def _unsign_data ( self , data , options ) : if options [ 'signature_algorithm_id' ] not in self . signature_algorithms : raise Exception ( 'Unknown signature algorithm id: %d' % options [ 'signature_algorithm_id' ] ) signature_algorithm = self . signature_algorithms [ options [ 'signature_algorithm_id' ] ] algorithm = self . _get_algorithm_info ( signature_algorithm ) key_salt = '' if algorithm [ 'salt_size' ] : key_salt = data [ - algorithm [ 'salt_size' ] : ] data = data [ : - algorithm [ 'salt_size' ] ] key = self . _generate_key ( options [ 'signature_passphrase_id' ] , self . signature_passphrases , key_salt , algorithm ) data = self . _decode ( data , algorithm , key ) return data
Verify and remove signature
Verify and remove signature