Caesar script used in crypto100-hotsun @ 3dsctf-2k16

int_caesar.py

## Caesar script used in crypto100-hotsun @ 3dsctf-2k16
# @author intrd - http://dann.com.br/
# @license Creative Commons Attribution-ShareAlike 4.0 International License - http://creativecommons.org/licenses/by-sa/4.0/

import base64, string

def int_caesar(ch, shift):
    n = ord(ch)
    if ord('a') <= n <= ord('z'):
        n = n - ord('a')
        n = (n + shift) % 26
        n = n + ord('a')
        return chr(n)
    elif ord('A') <= n <= ord('Z'):
        n = n - ord('A')
        n = (n + shift) % 26
        n = n + ord('A')
        return chr(n)
    else:
        return ch

def intCaesar(s, shift):
    return ''.join(int_caesar(ch, shift) for ch in s)

# Usage
# flag="3RG{hv1g_f0h_1g_b0h_g0_V0h}"
# flag="Toik! Znk Igkygx iovnkx, gryu qtuct gy g ynolz iovnkx, oy utk ul znk yosvrkyz luxsy ul ktixevzout. Tuc, utk rgyz wakyzout..."
# for x in range(1, 40):
#     try:
#         print x
#         print "shift: "+str(x)+" "+caesar(flag,x)
#     except Exception as e:
# print e