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trezor-firmware/core/tests/test_trezor.crypto.der.py

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from common import *
from trezor.crypto import der
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class TestCryptoDer(unittest.TestCase):
vectors_seq = [
(('9a0b7be0d4ed3146ee262b42202841834698bb3ee39c24e7437df208b8b70771',
'2b79ab1e7736219387dffe8d615bbdba87e11477104b867ef47afed1a5ede781'),
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'30450221009a0b7be0d4ed3146ee262b42202841834698bb3ee39c24e7437df208b8b7077102202b79ab1e7736219387dffe8d615bbdba87e11477104b867ef47afed1a5ede781'),
(('6666666666666666666666666666666666666666666666666666666666666666',
'7777777777777777777777777777777777777777777777777777777777777777'),
'30440220666666666666666666666666666666666666666666666666666666666666666602207777777777777777777777777777777777777777777777777777777777777777'),
(('6666666666666666666666666666666666666666666666666666666666666666',
'eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee'),
'304502206666666666666666666666666666666666666666666666666666666666666666022100eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee'),
(('eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
'7777777777777777777777777777777777777777777777777777777777777777'),
'3045022100eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee02207777777777777777777777777777777777777777777777777777777777777777'),
(('eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
'ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'),
'3046022100eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee022100ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'),
(('0000000000000000000000000000000000000000000000000000000000000066',
'0000000000000000000000000000000000000000000000000000000000000077'),
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'3006020166020177'),
(('0000000000000000000000000000000000000000000000000000000000000066',
'00000000000000000000000000000000000000000000000000000000000000ee'),
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'3007020166020200ee'),
(('00000000000000000000000000000000000000000000000000000000000000ee',
'0000000000000000000000000000000000000000000000000000000000000077'),
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'3007020200ee020177'),
(('00000000000000000000000000000000000000000000000000000000000000ee',
'00000000000000000000000000000000000000000000000000000000000000ff'),
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'3008020200ee020200ff'),
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]
def test_der_encode_seq(self):
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for s, d in self.vectors_seq:
s = tuple(unhexlify(i) for i in s)
d = unhexlify(d)
d2 = der.encode_seq(s)
self.assertEqual(d2, d)
s = [i.lstrip(b"\x00") for i in s]
s2 = der.decode_seq(d)
self.assertEqual(s2, s)
def test_der_encode_decode_long_seq(self):
for length in (1, 127, 128, 129, 255, 256, 257):
raw_int = bytes((i & 0xfe) + 1 for i in range(length))
for leading_zeros in range(3):
encoded = der.encode_seq((b"\x00" * leading_zeros + raw_int,))
decoded = der.decode_seq(encoded)
self.assertEqual(decoded, [raw_int])
for zeroes in range(3):
encoded = der.encode_seq((b"\x00" * zeroes,))
decoded = der.decode_seq(encoded)
self.assertEqual(decoded, [b"\x00"])
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if __name__ == '__main__':
unittest.main()