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+ Option to downgrade WRMHEADERs to v4.0.0.0

Browse source 
+ Removed CRC32 checksum
+ Several small fixed
This commit is contained in:
BuildTools 2024-11-14 18:19:38 +01:00
parent 042f8c2204
commit 70e47800df
8 changed files with 225 additions and 21 deletions
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10
pyplayready/cdm.py
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@ -30,14 +30,14 @@ class Cdm:
encryption_key: ECCKey,
signing_key: ECCKey,
client_version: str = "10.0.16384.10011",
la_version: int = 1
protocol_version: int = 1
):
self.security_level = security_level
self.certificate_chain = certificate_chain
self.encryption_key = encryption_key
self.signing_key = signing_key
self.client_version = client_version
self.la_version = la_version
self.protocol_version = protocol_version
self.curve = Curve.get_curve("secp256r1")
self.elgamal = ElGamal(self.curve)
@ -61,14 +61,14 @@ class Cdm:
signing_key=device.signing_key
)
def get_key_data(self):
def get_key_data(self) -> bytes:
point1, point2 = self.elgamal.encrypt(
message_point=self._xml_key.get_point(self.elgamal.curve),
public_key=self._wmrm_key
)
return self.elgamal.to_bytes(point1.x) + self.elgamal.to_bytes(point1.y) + self.elgamal.to_bytes(point2.x) + self.elgamal.to_bytes(point2.y)
def get_cipher_data(self):
def get_cipher_data(self) -> bytes:
b64_chain = base64.b64encode(self.certificate_chain.dumps()).decode()
body = f"<Data><CertificateChains><CertificateChain>{b64_chain}</CertificateChain></CertificateChains></Data>"
@ -94,7 +94,7 @@ class Cdm:
) -> str:
return (
'<LA xmlns="http://schemas.microsoft.com/DRM/2007/03/protocols" Id="SignedData" xml:space="preserve">'
f'<Version>{self.la_version}</Version>'
f'<Version>{self.protocol_version}</Version>'
f'<ContentHeader>{content_header}</ContentHeader>'
'<CLIENTINFO>'
f'<CLIENTVERSION>{self.client_version}</CLIENTVERSION>'