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@ -815,18 +815,18 @@ class DrmIonVoucher(object):
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addprottable(self.envelope)
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def decryptvoucher(self):
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shared = "PIDv3" + self.encalgorithm + self.enctransformation + self.hashalgorithm
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shared = ("PIDv3" + self.encalgorithm + self.enctransformation + self.hashalgorithm).encode('ASCII')
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self.lockparams.sort()
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for param in self.lockparams:
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if param == "ACCOUNT_SECRET":
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shared += param + self.secret
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shared += param.encode('ASCII') + self.secret
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elif param == "CLIENT_ID":
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shared += param + self.dsn
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shared += param.encode('ASCII') + self.dsn
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else:
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_assert(False, "Unknown lock parameter: %s" % param)
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sharedsecret = obfuscate(shared.encode('ASCII'), self.version)
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sharedsecret = obfuscate(shared, self.version)
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key = hmac.new(sharedsecret, b"PIDv3", digestmod=hashlib.sha256).digest()
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aes = AES.new(key[:32], AES.MODE_CBC, self.cipheriv[:16])
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