def parse_notation(data, hashed, encode_non_readable=b64encode):
flags = utils.long_to_int(data, 0)
notation_name_length = utils.short_to_int(data, 4)
notation_value_length = utils.short_to_int(data, 6)
name_end = 8 + notation_name_length
value_end = name_end + notation_value_length
notation_name = data[8:name_end].decode('utf8', 'replace')
notation_name, notation_namespace = \
(notation_name.split('@', 1) + [None])[:2]
notation_value = data[name_end:value_end]
if flags & 0xffffff:
# None of these flags are defined. They MUST be zero.
return None
human_readable = (flags >> 24) & 0xff == 0x80
if human_readable:
# human readable
notation_value = notation_value.decode('utf8', 'replace')
else:
notation_value = encode_non_readable(notation_value)
return {
u'name': notation_name,
u'namespace': notation_namespace,
u'human_readable': human_readable,
u'value': notation_value,
u'hashed': hashed,
}
def from_subpacket_content(cls, type_, critical, sub_data):
assert len(sub_data) >= 8
offset = 0
flags = sub_data[:4]
offset += 4
assert not any(flags[1:])
assert not flags[0] & 0x7f
human_readable = 0x80
name_length = utils.short_to_int(sub_data, offset)
offset += 2
value_length = utils.short_to_int(sub_data, offset)
offset += 2
raw_name = sub_data[offset:offset + name_length]
offset += name_length
value = sub_data[offset:offset + value_length]
offset += value_length
assert offset == len(sub_data)
name_and_namespace = raw_name.decode('utf8', 'replace')
name, namespace = (name_and_namespace.split('@', 1) + [None])[:2]
if human_readable:
value = value.decode('utf8', 'replace')
return cls(critical, name, namespace, human_readable, value)
def parse_notation(data, hashed, encode_non_readable=b64encode):
flags = utils.long_to_int(data, 0)
notation_name_length = utils.short_to_int(data, 4)
notation_value_length = utils.short_to_int(data, 6)
name_end = 8 + notation_name_length
value_end = name_end + notation_value_length
notation_name = data[8:name_end].decode('utf8', 'replace')
notation_name, notation_namespace = \
(notation_name.split('@', 1) + [None])[:2]
notation_value = data[name_end:value_end]
if flags & 0xffffff:
# None of these flags are defined. They MUST be zero.
return None
human_readable = (flags >> 24) & 0xff == 0x80
if human_readable:
# human readable
notation_value = notation_value.decode('utf8', 'replace')
else:
notation_value = encode_non_readable(notation_value)
return {
u'name': notation_name,
u'namespace': notation_namespace,
u'human_readable': human_readable,
u'value': notation_value,
u'hashed': hashed,
}
def from_subpacket_content(cls, type_, critical, sub_data):
assert len(sub_data) >= 8
offset = 0
flags = sub_data[:4]
offset += 4
assert not any(flags[1:])
assert not flags[0] & 0x7F
human_readable = 0x80
name_length = utils.short_to_int(sub_data, offset)
offset += 2
value_length = utils.short_to_int(sub_data, offset)
offset += 2
raw_name = sub_data[offset : offset + name_length]
offset += name_length
value = sub_data[offset : offset + value_length]
offset += value_length
assert offset == len(sub_data)
name_and_namespace = raw_name.decode("utf8", "replace")
name, namespace = (name_and_namespace.split("@", 1) + [None])[:2]
if human_readable:
value = value.decode("utf8", "replace")
return cls(critical, name, namespace, human_readable, value)