21 lines
640 B
Python
21 lines
640 B
Python
from ecpy.curves import Point, Curve
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from .ecc_key import ECCKey
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from .elgamal import ElGamal
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class XmlKey:
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"""Represents a PlayReady XMLKey"""
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def __init__(self):
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self._shared_point = ECCKey.generate()
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self.shared_key_x = self._shared_point.key.pointQ.x
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self.shared_key_y = self._shared_point.key.pointQ.y
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self._shared_key_x_bytes = ElGamal.to_bytes(int(self.shared_key_x))
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self.aes_iv = self._shared_key_x_bytes[:16]
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self.aes_key = self._shared_key_x_bytes[16:]
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def get_point(self, curve: Curve) -> Point:
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return Point(self.shared_key_x, self.shared_key_y, curve)
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