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#!/usr/bin/env python # -*- coding:utf-8 -*- from base64 import b64encode as b32encode from base64 import b64decode from gmpy2 import invert, gcd, iroot from Crypto.Util.number import *p = 177077389675257695042507998165006460849 n = 37421829509887796274897162249367329400988647145613325367337968063341372726061 c64 = '==gMzYDNzIjMxUTNyIzNzIjMyYTM4MDM0gTMwEjNzgTM2UTN4cjNwIjN2QzM5ADMwIDNyMTO4UzM2cTM5kDN2MTOyUTO5YDM0czM3MjM' c = int ( b64decode ( str ( c64)[::-1] ) ) print ( c ) q = n // p phi = (p - 1) * (q - 1) for e in range ( 50000, 70000 ):if gcd ( e, phi ) == 1:d = invert ( e, phi )m = pow ( c, d, n )flag=str(long_to_bytes(m))if 'flag' in flag or 'CTF' in flag or ("{" in flag and '}'in flag):print(flag)

在運行結果里面手動找一下 即可找到flag

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