25 lines
650 B
Python
25 lines
650 B
Python
from cryptography_s_des_exploring.sdes.sdes import apply_table, left_shift, p8_table, p10_table
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def generate_subkeys(key: str):
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"""
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Returns generated two subkeys: K1, K2 - from the 10-bit key
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key is a binary which represented with a 10 character string.
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"""
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temp = apply_table(key, p10_table)
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left = temp[:5]
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right = temp[5:]
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left = left_shift(left)
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right = left_shift(right)
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key1 = apply_table(left + right, p8_table)
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left = left_shift(left)
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right = left_shift(right)
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left = left_shift(left)
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right = left_shift(right)
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key2 = apply_table(left + right, p8_table)
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return key1, key2
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