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30 lines
1.1 KiB
Python
Executable File
30 lines
1.1 KiB
Python
Executable File
# This file is based on TLSharp
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# https://github.com/sochix/TLSharp/blob/master/TLSharp.Core/MTProto/Crypto/AuthKey.cs
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import utils
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from utils import BinaryWriter, BinaryReader
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class AuthKey:
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def __init__(self, gab=None, data=None):
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if gab:
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self.key = utils.get_byte_array(gab, signed=False)
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elif data:
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self.key = data
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else:
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raise AssertionError('Either a gab integer or data bytes array must be provided')
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with BinaryReader(utils.sha1(self.key)) as reader:
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self.aux_hash = reader.read_long(signed=False)
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reader.read(4)
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self.key_id = reader.read_long(signed=False)
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def calc_new_nonce_hash(self, new_nonce, number):
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"""Calculates the new nonce hash based on the current class fields' values"""
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with BinaryWriter() as writer:
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writer.write(new_nonce)
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writer.write_byte(number)
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writer.write_long(self.aux_hash, signed=False)
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new_nonce_hash = utils.sha1(writer.get_bytes())[4:20]
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return new_nonce_hash
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