31 lines
601 B
Python
31 lines
601 B
Python
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#!/usr/bin/env python3
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from math import lcm
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from gensafeprime import *
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from Crypto.Util.number import *
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from flag import flag
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def keygen(nbit):
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p, q = [generate(nbit) for _ in '01']
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n, e, phi = p * q, 65537, lcm(p - 1, q - 1)
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d = inverse(e, phi)
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return n, e, d
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def encrypt(n, e, d, m):
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c1 = pow(n + 1, d >> 3, n ** 2)
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c2 = pow(m, e, n)
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return (c1, c2)
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flag = bytes_to_long(flag)
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print (flag)
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n, e, d = keygen(512)
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c1, c2 = encrypt(n, e, d, flag)
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print(f'n = {n}')
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print(f'c1 = {c1}')
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print(f'c2 = {c2}')
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#validity = '[OK]' if (c1 - 1) % n == 0 else '[Not OK!]'
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#d3 = (c1 - 1) // n
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#....
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