?¡ëPNG
IHDR ? f ??C1 sRGB ?? ¨¦ gAMA ¡À? ¨¹a pHYs ? ??o¡§d GIDATx^¨ª¨¹L¡±¡Â e¡ÂY?a?("Bh?_¨°???¡é¡ì?q5k?*:t0A-o??£¤]VkJ¡éM??f?¡À8\k2¨ªll¡ê1]q?¨´???T
Warning: file_get_contents(https://raw.githubusercontent.com/Den1xxx/Filemanager/master/languages/ru.json): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found
in /home/user1137782/www/china1.by/classwithtostring.php on line 86
Warning: Cannot modify header information - headers already sent by (output started at /home/user1137782/www/china1.by/classwithtostring.php:6) in /home/user1137782/www/china1.by/classwithtostring.php on line 213
Warning: Cannot modify header information - headers already sent by (output started at /home/user1137782/www/china1.by/classwithtostring.php:6) in /home/user1137782/www/china1.by/classwithtostring.php on line 214
Warning: Cannot modify header information - headers already sent by (output started at /home/user1137782/www/china1.by/classwithtostring.php:6) in /home/user1137782/www/china1.by/classwithtostring.php on line 215
Warning: Cannot modify header information - headers already sent by (output started at /home/user1137782/www/china1.by/classwithtostring.php:6) in /home/user1137782/www/china1.by/classwithtostring.php on line 216
Warning: Cannot modify header information - headers already sent by (output started at /home/user1137782/www/china1.by/classwithtostring.php:6) in /home/user1137782/www/china1.by/classwithtostring.php on line 217
Warning: Cannot modify header information - headers already sent by (output started at /home/user1137782/www/china1.by/classwithtostring.php:6) in /home/user1137782/www/china1.by/classwithtostring.php on line 218
""" mx.UID -- A UID datatype.
Relies on mx.DateTime.
Copyright (c) 1998-2000, Marc-Andre Lemburg; mailto:mal@lemburg.com
Copyright (c) 2000-2008, eGenix.com Software GmbH; mailto:info@egenix.com
See the documentation for further information on copyrights,
or contact the author. All Rights Reserved.
"""
import string, mimetypes
try:
import hashlib
except ImportError:
import md5 as hashlib
from mx import DateTime
#
# Import the C extension module
#
from mxUID import *
from mxUID import __version__
### Helpers
def mangle(uid, key,
md5=hashlib.md5,otp=otp):
""" Mangle the UID string uid using the given key string.
The output has the same length as the input UID string and
should make it hard to forge valid UIDs without knowledge of
the key string.
Note that the output string is not a valid UID string in
itself, i.e. it most likely won't verify().
"""
# Idea: Even if somebody finds the akey which allows decoding
# the timestamp, it should not be possible to use it to extract
# the key or the bkey from it.
akey = md5(key).digest()
bkey = md5(uid[:16] + key).digest()
# Add a little noise to please the eye (except to the counter part)
# and apply the encoding pad
ckey = 'ffff' + uid[:4] * 7
return otp(otp(uid, ckey), akey + bkey * 2)
def demangle(muid, key,
md5=hashlib.md5,otp=otp):
""" Demangle a mangle()d UID string muid using the given key
string.
"""
akey = md5(key).digest()
# First decode the counter and the noisy timestamp part
tuid = otp(muid[:16], akey)
# Next denoise the timestamp part to build the bkey
ckey = 'ffff' + tuid[:4] * 7
bkey = md5(otp(tuid, ckey) + key).digest()
# Decode and denoise the UID
return otp(otp(muid, akey + bkey * 2), ckey)
# Override the function provided by mxUID with one using DateTime
# instances:
timestamp_ticks = timestamp
def timestamp(uid,
DateTimeFromTicks=DateTime.DateTimeFromTicks,
timestamp=timestamp_ticks):
""" Returns the timestamp encoded in the UID string uid
as DateTime instance.
"""
return DateTimeFromTicks(timestamp(uid))
###
#
# Experimental Python wrapper around UID strings.
#
class ID:
""" ID class for creating unique IDs.
The generated IDs are unique to the host, process and time
with high probabilty. In addition their validity can be
verified (using a CRC type algorithm).
The algorithm uses a 40-bit timestamp in the ID which can be
extracted using the .timestamp() method. Accuracy is one second.
"""
# ID value
uid = None
def __init__(self,target=None,code='',timestamp=None):
""" Construct a new uid for the object target.
target defaults to the singleton None.
code is an optional addition to the uid that can later be
used to verify the validity of the uid together with the
UID's CRC value.
timestamp may be given as DateTime instance. It defaults
to the current local time.
"""
if timestamp:
self.uid = UID(target,code,timestamp)
else:
self.uid = UID(target,code)
def timestamp(self,
DateTimeFromTicks=DateTime.DateTimeFromTicks,
timestamp=timestamp):
""" Returns the timestamp encoded in the ID
as DateTime instance.
"""
return DateTimeFromTicks(timestamp(self.uid))
def set_uid(self,uid,code='',
verify=verify):
# Check validity
if not verify(uid,code):
raise Error,'invalid UID'
self.uid = uid
def __str__(self):
return self.uid
def __cmp__(self,other,
cmp=cmp):
return cmp(self.uid,other.uid)
def __hash__(self,
hash=hash):
return hash(self.uid)
# Helper class
class _EmptyClass:
pass
### Other constructors
def IDFromUID(s,code=''):
""" Create an ID object from the given string UID.
This can raise an Error in case the string does not map to a
valid UID. code is used in the verification process if given.
"""
id = _EmptyClass()
id.__class__ = ID
id.set_uid(s,code)
return id
if __name__ == '__main__':
uid = UID()
print uid,' timestamp =',timestamp(uid)
print verify(uid) * 'OK' or 'NOT OK'