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executable file 83 lines (65 sloc) 1.32 KB
#!/usr/bin/python
# Top LED
l1 = 0
l2 = 0
l3 = 0
l4 = 0
l5 = 0
l6 = 0
l7 = 0
# Outputs
da = 0
db = 0
# FF Q
ic1q = 0
ic2q = 0
def encoder():
v = 0
v = ic1q # x1 = ic1q
v = 2*v + ic2q # x2 = ic2q
v = 2*v + int(not(l1)) # x3 = not l1
v = 2*v + int(not(l2)) # x4 = not l2
v = 2*v + int(not(l3)) # x5 = not l3
v = 2*v + int(not(l7)) # x6 = not l7
return v
def update_led():
global l1, l2, l3, l4, l5, l6, l7
l1 = da or not(ic2q)
l2 = not(l1) or not(ic1q)
l3 = db or ic2q
l4 = not(ic1q) or not(ic2q)
l5 = not(ic1q) or not(l4)
l6 = not(ic2q) or not(l4)
l7 = not(l5) or not(l6)
def update_ff_q():
global ic1q, ic2q
ic1q = da
ic2q = db
c = '@'
flag = ""
try:
update_led()
for i in range(10) :
if c == 'Y' :
da = 0
db = 1
else:
if (i & 1) == 0 :
da = 0
else :
da = 1
if (i & 2) == 0 :
db = 0
else :
db = 1
update_led()
#time.sleep(0.1)
c = chr(encoder()+32)
flag = flag + c
update_ff_q()
update_led()
#time.sleep(0.1)
flag = flag + chr(encoder()+32)
except KeyboardInterrupt:
print("stop\n")
print "The flag is SECCON{"+flag+"}"