60 lines
2.6 KiB
Python
60 lines
2.6 KiB
Python
from vinetrimmer.utils.MSL import EntityAuthenticationSchemes
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from vinetrimmer.utils.MSL.MSLObject import MSLObject
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# noinspection PyPep8Naming
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class EntityAuthentication(MSLObject):
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def __init__(self, scheme, authdata):
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"""
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Data used to identify and authenticate the entity associated with a message.
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https://github.com/Netflix/msl/wiki/Entity-Authentication-%28Configuration%29
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:param scheme: Entity Authentication Scheme identifier
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:param authdata: Entity Authentication data
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"""
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self.scheme = str(scheme)
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self.authdata = authdata
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@classmethod
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def Unauthenticated(cls, identity):
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"""
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The unauthenticated entity authentication scheme does not provide encryption or authentication and only
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identifies the entity. Therefore entity identities can be harvested and spoofed. The benefit of this
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authentication scheme is that the entity has control over its identity. This may be useful if the identity is
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derived from or related to other data, or if retaining the identity is desired across state resets or in the
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event of MSL errors requiring entity re-authentication.
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"""
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return cls(
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scheme=EntityAuthenticationSchemes.Unauthenticated,
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authdata={"identity": identity}
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)
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@classmethod
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def Widevine(cls, devtype, keyrequest):
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"""
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The Widevine entity authentication scheme is used by devices with the Widevine CDM. It does not provide
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encryption or authentication and only identifies the entity. Therefore entity identities can be harvested
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and spoofed. The entity identity is composed from the provided device type and Widevine key request data. The
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Widevine CDM properties can be extracted from the key request data.
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When coupled with the Widevine key exchange scheme, the entity identity can be cryptographically validated by
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comparing the entity authentication key request data against the key exchange key request data.
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Note that the local entity will not know its entity identity when using this scheme.
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> Devtype
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An arbitrary value identifying the device type the local entity wishes to assume. The data inside the Widevine
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key request may be optionally used to validate the claimed device type.
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:param devtype: Local entity device type
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:param keyrequest: Widevine key request
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"""
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return cls(
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scheme=EntityAuthenticationSchemes.Widevine,
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authdata={
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"devtype": devtype,
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"keyrequest": keyrequest
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}
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)
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