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I have a python program i am trying to understand what it does exactly with a date and a certain 8 digit code
can anyone look at the code and try to explain it, i understand some coding but not alot
thank you in advance to any that help....
can anyone look at the code and try to explain it, i understand some coding but not alot
thank you in advance to any that help....
Code:
mport time, urlparse
def application(environ, start_response):
start_response("200 OK", [("Content-type","text/html")])
yield """<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Wii Parental Control Password Resetter</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<style type="text/css">
.title {
font-size: 18pt;
font-family: sans-serif;
}
.response {
font-size: 16pt;
font-family: sans-serif;
}
.error {
color: red;
font-size: 16pt;
font-family: sans-serif;
}
</style>
</head>
<body>
<div class="title">Wii Parental Control password reset tool</div>"""
uri = environ["REQUEST_URI"]
qs = urlparse.urlparse(uri).query
form = urlparse.parse_qs(qs)
ctime = time.time()
def opt_date(delta):
t = time.gmtime(ctime + delta * 3600 * 24)
if delta == 0:
selected = ' selected="selected"'
else:
selected = ""
return '<option value="%02d%02d" %s>%s</option>'%(t.tm_mon,t.tm_mday,selected,time.strftime("%a, %d %b %Y",t))
class CRC32:
def __init__(self):
self.gentable()
def crc32(self, input, crc=0xffffffffl):
count = len(input)
i = 0
while count != 0:
count -= 1
temp1 = (crc >> 8) & 0xFFFFFF
temp2 = self.table[(crc ^ ord(input[i])) & 0xFF]
crc = temp1 ^ temp2
i += 1
return crc
def gentable(self):
self.table = []
for i in range(256):
crc = i
for j in range(8):
if crc & 1:
crc = (crc >> 1) ^ 0xEDB88320l
else:
crc >>= 1
self.table.append(crc)
def error(s):
return '<div class="error">%s</div>'%s
def process():
try:
int(form["number"][0]) #validate
if len(form["number"][0]) != 8 or not all([x in "0123456789" for x in form["number"][0]]):
raise ValueError()
except:
return error("Please provide a valid 8-digit confirmation number")
try:
int(form["date"][0]) #validate
if len(form["date"][0]) != 4 or not all([x in "0123456789" for x in form["date"][0]]):
raise ValueError()
except:
return error("Invalid date")
fullnum = form["date"][0] + form["number"][0][4:8]
crc = CRC32().crc32(fullnum)
code = ((crc ^ 0xaaaa) + 0x14c1) % 100000
return '<div class="response">Your unlock code:<span class="code">%05d</span></div>'%code
if form.has_key("submit"):
yield process()
yield """
<div class="form">
<form action="/parental">
<p>Confirmation Number:
<input name="number" type="text" size="9" maxlength="8" value="" /></p>
<p>Current Date in your timezone:
<select name="date" size="1">"""
yield opt_date(-1)
yield opt_date(0)
yield opt_date(1)
yield """</select><br /></p>
<p><input name="submit" type="submit" value="Get Reset Code" /></p>
</form>
</div>
<p>
<a href="http://validator.w3.org/check?uri=referer"><img
src="http://www.w3.org/Icons/valid-xhtml10-blue"
alt="Valid XHTML 1.0 Strict" height="31" width="88" /></a>
<a href="http://jigsaw.w3.org/css-validator/">
<img style="border:0;width:88px;height:31px"
src="http://jigsaw.w3.org/css-validator/images/vcss-blue"
alt="Valid CSS!" />
</a>
<br />
<a href="parental_src.py">Source code</a>
</p>
</body>
</html>"""
Always touching 
] brb
