Created
January 31, 2021 16:32
-
-
Save lttn1204/ac037d6dd44ee946c833bdb772957325 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import binascii | |
import random | |
from Crypto.Util.number import isPrime | |
flag = open("flag.txt", "rb").read().strip() | |
m = int(binascii.hexlify(flag), 16) | |
def genPrimes(size): | |
base = random.getrandbits(size // 2) << size // 2 | |
base = base | (1 << 1023) | (1 << 1022) | 1 | |
while True: | |
temp = base | random.getrandbits(size // 2) | |
if isPrime(temp): | |
p = temp | |
break | |
while True: | |
temp = base | random.getrandbits(size // 2) | |
if isPrime(temp): | |
q = temp | |
break | |
return (p, q) | |
p, q = genPrimes(1024) | |
n = p * q | |
e = 0x10001 | |
print("c:", pow(m, e, n)) | |
#n=23135514747783882716888676812295359006102435689848260501709475114767217528965364658403027664227615593085036290166289063788272776788638764660757735264077730982726873368488789034079040049824603517615442321955626164064763328102556475952363475005967968681746619179641519183612638784244197749344305359692751832455587854243160406582696594311842565272623730709252650625846680194953309748453515876633303858147298846454105907265186127420148343526253775550105897136275826705375222242565865228645214598819541187583028360400160631947584202826991980657718853446368090891391744347723951620641492388205471242788631833531394634945663 | |
#c=17830167351685057470426148820703481112309475954806278304600862043185650439097181747043204885329525211579732614665322698426329449125482709124139851522121862053345527979419420678255168453521857375994190985370640433256068675028575470040533677286141917358212661540266638008376296359267047685745805295747215450691069703625474047825597597912415099008745060616375313170031232301933185011013735135370715444443319033139774851324477224585336813629117088332254309481591751292335835747491446904471032096338134760865724230819823010046719914443703839473237372520085899409816981311851296947867647723573368447922606495085341947385255 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment