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added RSA decode script

master
Christopher Yu 5 jaren geleden
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1 gewijzigde bestanden met toevoegingen van 22 en 0 verwijderingen
  1. +22
    -0
      TAMUCTF/Crypto/RSAaaay/decodrsa.py

+ 22
- 0
TAMUCTF/Crypto/RSAaaay/decodrsa.py Bestand weergeven

@ -0,0 +1,22 @@
from Crypto.Util.number import inverse
from fractions import *
e = 43
n = 2531257
c = "906851 991083 1780304 2380434 438490 356019 921472 822283 817856 556932 2102538 2501908 2211404 991083 1562919 38268"
c = c.split(" ")
c = map(int, c)
p = 509
q = 4973
phi = (p - 1) * (q - 1)
d = inverse(e, phi)
m = []
for i in c:
m.append(pow(i, d, n))
print m
plain = [103, 105, 103, 101, 109, 123, 83, 97, 118, 97, 103, 101, 95, 83, 105, 120, 95, 70, 108, 121, 105, 110, 103, 95, 84, 105, 103, 101, 114, 115, 125]
flag = ""
for i in plain:
flag += chr(i)
print "Decoded flag : ", flag

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