def delete_transferrable_key(self, key):
if self.read_only:
raise TypeError
if key.fingerprint[-8:] not in self._offset_table:
raise KeyError
offset = self._offset_table[key.fingerprint[-8:]]
self.lock_db()
try:
data = b''
with open(self.filename, 'rb') as fh:
data = fh.read(offset)
packets = []
packet_iter = parse_binary_packet_stream(fh)
header_format = None
for packet in packet_iter:
if header_format is None:
header_format = packet.header_format
if packets and packet.type in (
constants.PUBLIC_KEY_PACKET_TYPE,
constants.SECRET_KEY_PACKET_TYPE,
):
break
last_offset = fh.tell()
fh.seek(last_offset)
data += fh.read()
with open(self.filename, 'wb') as fh:
fh.write(data)
self._update_offset_table()
finally:
self.unlock_db()
def _get_key(self, offset):
self.lock_db()
try:
with open(self.filename, 'rb') as fh:
fh.seek(offset)
packets = []
packet_iter = parse_binary_packet_stream(fh)
for packet in packet_iter:
if packet.type == constants.COMPRESSED_DATA_PACKET_TYPE:
continue
elif packets and packet.type in (
constants.PUBLIC_KEY_PACKET_TYPE,
constants.SECRET_KEY_PACKET_TYPE,
):
break
else:
packets.append(packet)
finally:
self.unlock_db()
key = None
if packets and packets[0].type == constants.PUBLIC_KEY_PACKET_TYPE:
key = TransferablePublicKey.from_packets(packets)
elif packets and packets[0].type == constants.SECRET_KEY_PACKET_TYPE:
key = TransferableSecretKey.from_packets(packets)
elif packets:
raise ValueError(packets[0])
else:
raise KeyError()
return key
def delete_transferrable_key(self, key):
if self.read_only:
raise TypeError
if key.fingerprint[-8:] not in self._offset_table:
raise KeyError
offset = self._offset_table[key.fingerprint[-8:]]
self.lock_db()
try:
data = b''
with open(self.filename, 'rb') as fh:
data = fh.read(offset)
packets = []
packet_iter = parse_binary_packet_stream(fh)
header_format = None
for packet in packet_iter:
if header_format is None:
header_format = packet.header_format
if packets and packet.type in (
constants.PUBLIC_KEY_PACKET_TYPE,
constants.SECRET_KEY_PACKET_TYPE,
):
break
last_offset = fh.tell()
fh.seek(last_offset)
data += fh.read()
with open(self.filename, 'wb') as fh:
fh.write(data)
self._update_offset_table()
finally:
self.unlock_db()
def _get_key(self, offset):
self.lock_db()
try:
with open(self.filename, 'rb') as fh:
fh.seek(offset)
packets = []
packet_iter = parse_binary_packet_stream(fh)
for packet in packet_iter:
if packet.type == constants.COMPRESSED_DATA_PACKET_TYPE:
continue
elif packets and packet.type in (
constants.PUBLIC_KEY_PACKET_TYPE,
constants.SECRET_KEY_PACKET_TYPE,
):
break
else:
packets.append(packet)
finally:
self.unlock_db()
key = None
if packets and packets[0].type == constants.PUBLIC_KEY_PACKET_TYPE:
key = TransferablePublicKey.from_packets(packets)
elif packets and packets[0].type == constants.SECRET_KEY_PACKET_TYPE:
key = TransferableSecretKey.from_packets(packets)
elif packets:
raise ValueError(packets[0])
else:
raise KeyError()
return key
def _update_offset_table(self):
offset_table = {}
self.lock_db()
try:
with open(self.filename, 'rb') as fh:
packet_iter = parse_binary_packet_stream(fh)
last_offset = fh.tell()
for packet in packet_iter:
if self._preferred_header_format is None:
self._preferred_header_format = packet.header_format
if packet.type in (
constants.PUBLIC_KEY_PACKET_TYPE,
constants.SECRET_KEY_PACKET_TYPE,
):
offset_table[packet.key_id[-8:]] = last_offset
last_offset = fh.tell()
finally:
self.unlock_db()
self._offset_table = offset_table
def _update_offset_table(self):
offset_table = {}
self.lock_db()
try:
with open(self.filename, 'rb') as fh:
packet_iter = parse_binary_packet_stream(fh)
last_offset = fh.tell()
for packet in packet_iter:
if self._preferred_header_format is None:
self._preferred_header_format = packet.header_format
if packet.type in (
constants.PUBLIC_KEY_PACKET_TYPE,
constants.SECRET_KEY_PACKET_TYPE,
):
offset_table[packet.key_id[-8:]] = last_offset
last_offset = fh.tell()
finally:
self.unlock_db()
self._offset_table = offset_table
