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from unittest import TestCase
import numpy as np
from pyecsca.sca import Trace, match_pattern, match_part, pad
from .utils import Plottable
class MatchingTests(Plottable):
def test_simple_match(self):
pattern = Trace(np.array([1, 15, 12, -10, 0, 13, 17, -1, 0], dtype=np.dtype("i1")), None)
base = Trace(np.array(
[0, 1, 3, 1, 2, -2, -3, 1, 15, 12, -10, 0, 13, 17, -1, 0, 3, 1],
dtype=np.dtype("i1")), None)
filtered = match_part(base, 7, 9)
self.assertListEqual(filtered, [7])
self.plot(base=base, pattern=pad(pattern, (filtered[0], 0)))
def test_multiple_match(self):
pattern = Trace(np.array([1, 15, 12, -10, 0, 13, 17, -1, 0], dtype=np.dtype("i1")), None)
base = Trace(np.array(
[0, 1, 3, 1, 2, -2, -3, 1, 18, 10, -5, 0, 13, 17, -1, 0, 3, 1, 2, 5, 13, 8, -8, 1,
11, 15, 0, 1, 5, 2, 4],
dtype=np.dtype("i1")), None)
filtered = match_pattern(base, pattern, 0.9)
self.assertListEqual(filtered, [7, 19])
self.plot(base=base, pattern1=pad(pattern, (filtered[0], 0)), pattern2=pad(pattern, (filtered[1], 0)))
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