def set_data(self,
ef,
tag: int,
value: str,
verify: bool = False,
conserve: bool = False):
"""Execute SET DATA.
Args
ef : string or list of strings indicating name or path of transparent EF
tag : BER-TLV Tag of value to be stored
value : BER-TLV value to be stored
"""
r = self.select_path(ef)
if len(r[-1]) == 0:
return (None, None)
# in case of deleting the data, we only have 'tag' but no 'value'
if not value:
return self._set_data('%02x' % tag, first=True)
# FIXME: proper BER-TLV encode
tl = '%02x%s' % (tag, b2h(bertlv_encode_len(len(value) // 2)))
tlv = tl + value
tlv_bin = h2b(tlv)
first = True
total_len = len(tlv_bin)
remaining = tlv_bin
while len(remaining) > 0:
fragment = remaining[:255]
rdata, sw = self._set_data(fragment, first=first)
first = False
remaining = remaining[255:]
return rdata, sw
def test_BerTlvLenDec(self):
self.assertEqual(utils.bertlv_encode_len(1), b'\x01')
self.assertEqual(utils.bertlv_encode_len(127), b'\x7f')
self.assertEqual(utils.bertlv_encode_len(128), b'\x81\x80')
self.assertEqual(utils.bertlv_encode_len(0x123456),
b'\x83\x12\x34\x56')
def _encode_len(self, val: bytes) -> bytes:
return bertlv_encode_len(len(val))