class Key(PGPMessage):
def __init__(self, passphrase=None):
self._passphrase = passphrase
super(Key, self).__init__()
def reset(self):
super(Key, self).reset()
self.keys = ValueTracker()
@property
def passphrase(self):
"""Return a function to get the passphrase"""
if not callable(self._passphrase):
_passphrase = self._passphrase
def get_passphrase(message, info):
return _passphrase
self._passphrase = get_passphrase
return self._passphrase
def parse(self, region):
self.reset()
self.consume(region)
return self
def key_dict(self, keys=None):
if keys is None:
keys = self.keys.consumed()
result = {}
for key, subkeys in keys:
result[key['key_id']] = key['key']
result.update(self.key_dict(subkeys))
return result
####################
### ADDING KEYS
####################
def add_key(self, info):
"""Start a new public key"""
self.keys.end_item()
self.keys.start_item(info)
def add_sub_key(self, info):
"""Add a sub public key"""
self.keys.start_item(info)
def reset(self):
self.tags = ValueTracker()
def reset(self):
super(Key, self).reset()
self.keys = ValueTracker()
class PGPMessage(object):
"""
Class to hold details about a pgp message:
Whether that be keys or encrypted data
Has method for consuming the data using a PacketParser as message.consume
"""
def __init__(self):
self.reset()
def reset(self):
self.tags = ValueTracker()
####################
### CONSUMING
####################
@property
def packet_consumer(self):
"""Memoized PacketParser"""
if not hasattr(self, '_packet_consumer'):
from packet_parser import PacketParser
self._packet_consumer = PacketParser()
return self._packet_consumer
@property
def subsignature_consumer(self):
"""Memoized SubSignatureParser"""
if not hasattr(self, '_subsignature_consumer'):
from packet_parser import SubSignatureParser
self._subsignature_consumer = SubSignatureParser()
return self._subsignature_consumer
def consume(self, region):
"""
Consume a message.
If a string is passed in as region, it is converted to a bitstream for you
"""
if isinstance(region, (str, unicode)):
region = bitstring.ConstBitStream(bytes=region)
self.packet_consumer.consume(self, region)
def consume_subsignature(self, region):
"""
Consume subsignature packets
If a string is passed in as region, it is converted to a bitstream for you
"""
if isinstance(region, (str, unicode)):
region = bitstring.ConstBitStream(bytes=region)
self.subsignature_consumer.consume(self, region)
####################
### ADDING TAGS
####################
def start_tag(self, tag):
"""Record start of a new tag"""
self.tags.start_item(tag)
def end_tag(self):
"""Record end of a new tag"""
self.tags.end_item()
