tkbctf2 SkillAnalyzer (Binary 350)

skill_analyzer.py

import sys

a = [2, 3, 5, 7, 11, 13, 17]
b = [132, 110, 112, 38, 112, 96, 33, 115, 194, 104, 87, 118, 3, 105, 50, 103, 99, 75, 9, 85, 74, 72, 92, 78, 188, 16]
c = [4, 84, 0, 162, 72, 144, 64, 138, 16, 0, 8, 2, 0, 8, 0, 163]

print "You're the DJ of this gig!"
print '========'
for c1 in c:
    print '{0:08b}'.format(c1)[::-1].replace('0', ' ').replace('1','-')
print '========'

numArray = [0] * 16

for i in range(16):
    n = 1
    str = raw_input()
    if str == '':
        n = 1
    else:
        if str[0] == 'S':
            str = str[1:]
            n = 19
        for c in str:
            if '1' <= c <= '7':
                n = a[ord(c) - ord('1')] * n % 255
            else:
                print 'Oops.'
                sys.exit(0)
    numArray[i] = n

for i in range(len(b)):
    index = i % 16
    n = numArray[index]
    b[i] = b[i] ^ n
    numArray[index] = (n + 36) % 255

r = ''.join([chr(a) if a <= 126 else '?' for a in b])
print r

'''
S157

3

1
3

4
137
6
47
36
157

246
2

You're the 7th dan player!
'''