Remove ecdsa dependency, use cryptography only #2
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onvej-sl
reviewed
Dec 18, 2025
| if x1 == x2: | ||
| return None | ||
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| slope = ((y2 - y1) * self._inverse_mod((x2 - x1) % self.p)) % self.p |
Collaborator
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% is unnecessary since it happens in _inverse_mod().
Suggested change
| slope = ((y2 - y1) * self._inverse_mod((x2 - x1) % self.p)) % self.p | |
| slope = ((y2 - y1) * self._inverse_mod(x2 - x1)) % self.p |
onvej-sl
reviewed
Dec 18, 2025
| if y == 0: | ||
| return None | ||
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| slope = ((3 * x * x + self.a) * self._inverse_mod((2 * y) % self.p)) % self.p |
Collaborator
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Suggested change
| slope = ((3 * x * x + self.a) * self._inverse_mod((2 * y) % self.p)) % self.p | |
| slope = ((3 * x * x + self.a) * self._inverse_mod(2 * y)) % self.p |
onvej-sl
reviewed
Dec 18, 2025
| y3 = (slope * (x - x3) - y) % self.p | ||
| return x3, y3 | ||
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| def _scalar_mult(self, scalar: int, point: Tuple[int, int]) -> Point: |
Collaborator
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Suggested change
| def _scalar_mult(self, scalar: int, point: Tuple[int, int]) -> Point: | |
| def _scalar_mult(self, scalar: int, point: Point) -> Point: |
onvej-sl
reviewed
Dec 18, 2025
Comment on lines
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| x = int.from_bytes(data[1 : 1 + self.coordinate_size], "big") | ||
| y = int.from_bytes(data[1 + self.coordinate_size :], "big") |
Collaborator
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Suggested change
| x = int.from_bytes(data[1 : 1 + self.coordinate_size], "big") | |
| y = int.from_bytes(data[1 + self.coordinate_size :], "big") | |
| x = int.from_bytes(data[1 : 1 + self.coordinate_size], "big") | |
| if (x >= self.p): | |
| raise ValueError("Invalid x-coordinate") | |
| y = int.from_bytes(data[1 + self.coordinate_size :], "big") | |
| if (y >= self.p): | |
| raise ValueError("Invalid y-coordinate") |
onvej-sl
reviewed
Dec 18, 2025
| if len(data) != self.coordinate_size + 1 or data[0] not in (2, 3): | ||
| raise ValueError("Invalid public key encoding") | ||
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| x = int.from_bytes(data[1:], "big") |
Collaborator
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Suggested change
| x = int.from_bytes(data[1:], "big") | |
| if (x >= self.p): | |
| raise ValueError("Invalid x-coordinate") |
onvej-sl
reviewed
Dec 18, 2025
Comment on lines
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| if x >= self.p: | ||
| raise ValueError("Invalid point") |
Collaborator
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Suggested change
| if x >= self.p: | |
| raise ValueError("Invalid point") | |
| if self.p % 4 != 3: | |
| raise NotImplementedError("Square root for this modulus is not implemented") |
Collaborator
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Closing in favor of #4. |
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What title says
The code was generated using Codex - please review meticulously!
The tests pass though.