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Document the crypto/ module

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Lonami Exo
2017-11-26 16:57:40 +01:00
parent 74ec6391d9
commit a932fb6470
8 changed files with 142 additions and 21 deletions
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20
telethon/crypto/auth_key.py
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@@ -1,3 +1,6 @@
"""
This module holds the AuthKey class.
"""
import struct
from hashlib import sha1
@@ -6,7 +9,16 @@ from ..extensions import BinaryReader
class AuthKey:
"""
Represents an authorization key, used to encrypt and decrypt
messages sent to Telegram's data centers.
"""
def __init__(self, data):
"""
Initializes a new authorization key.
:param data: the data in bytes that represent this auth key.
"""
self.key = data
with BinaryReader(sha1(self.key).digest()) as reader:
@@ -15,8 +27,12 @@ class AuthKey:
self.key_id = reader.read_long(signed=False)
def calc_new_nonce_hash(self, new_nonce, number):
"""Calculates the new nonce hash based on
the current class fields' values
"""
Calculates the new nonce hash based on the current attributes.
:param new_nonce: the new nonce to be hashed.
:param number: number to prepend before the hash.
:return: the hash for the given new nonce.
"""
new_nonce = new_nonce.to_bytes(32, 'little', signed=True)
data = new_nonce + struct.pack('<BQ', number, self.aux_hash)