/usr/lib/python2.7/dist-packages/M2Crypto/ASN1.py is in python-m2crypto 0.21.1-3ubuntu5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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M2Crypto wrapper for OpenSSL ASN1 API.
Copyright (c) 1999-2004 Ng Pheng Siong. All rights reserved.
Portions created by Open Source Applications Foundation (OSAF) are
Copyright (C) 2005 OSAF. All Rights Reserved.
"""
import time, datetime
import BIO
import m2
MBSTRING_FLAG = 0x1000
MBSTRING_ASC = MBSTRING_FLAG | 1
MBSTRING_BMP = MBSTRING_FLAG | 2
class ASN1_Integer:
m2_asn1_integer_free = m2.asn1_integer_free
def __init__(self, asn1int, _pyfree=0):
self.asn1int = asn1int
self._pyfree = _pyfree
def __cmp__(self, other):
return m2.asn1_integer_cmp(self.asn1int, other.asn1int)
def __del__(self):
if self._pyfree:
self.m2_asn1_integer_free(self.asn1int)
class ASN1_String:
m2_asn1_string_free = m2.asn1_string_free
def __init__(self, asn1str, _pyfree=0):
self.asn1str = asn1str
self._pyfree = _pyfree
def __str__(self):
buf = BIO.MemoryBuffer()
m2.asn1_string_print( buf.bio_ptr(), self.asn1str )
return buf.read_all()
def __del__(self):
if getattr(self, '_pyfree', 0):
self.m2_asn1_string_free(self.asn1str)
def _ptr(self):
return self.asn1str
def as_text(self, flags=0):
buf = BIO.MemoryBuffer()
m2.asn1_string_print_ex( buf.bio_ptr(), self.asn1str, flags)
return buf.read_all()
class ASN1_Object:
m2_asn1_object_free = m2.asn1_object_free
def __init__(self, asn1obj, _pyfree=0):
self.asn1obj = asn1obj
self._pyfree = _pyfree
def __del__(self):
if self._pyfree:
self.m2_asn1_object_free(self.asn1obj)
def _ptr(self):
return self.asn1obj
class _UTC(datetime.tzinfo):
def tzname(self, dt):
return "UTC"
def dst(self, dt):
return datetime.timedelta(0)
def utcoffset(self, dt):
return datetime.timedelta(0)
def __repr__(self):
return "<Timezone: %s>" % self.tzname(None)
UTC = _UTC()
class LocalTimezone(datetime.tzinfo):
""" Localtimezone from datetime manual """
def __init__(self):
self._stdoffset = datetime.timedelta(seconds = -time.timezone)
if time.daylight:
self._dstoffset = datetime.timedelta(seconds = -time.altzone)
else:
self._dstoffset = self._stdoffset
self._dstdiff = self._dstoffset - self._stdoffset
def utcoffset(self, dt):
if self._isdst(dt):
return self._dstoffset
else:
return self._stdoffset
def dst(self, dt):
if self._isdst(dt):
return self._dstdiff
else:
return datetime.timedelta(0)
def tzname(self, dt):
return time.tzname[self._isdst(dt)]
def _isdst(self, dt):
tt = (dt.year, dt.month, dt.day,
dt.hour, dt.minute, dt.second,
dt.weekday(), 0, -1)
stamp = time.mktime(tt)
tt = time.localtime(stamp)
return tt.tm_isdst > 0
class ASN1_UTCTIME:
_ssl_months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
"Sep", "Oct", "Nov", "Dec"]
m2_asn1_utctime_free = m2.asn1_utctime_free
def __init__(self, asn1_utctime=None, _pyfree=0):
if asn1_utctime is not None:
assert m2.asn1_utctime_type_check(asn1_utctime), "'asn1_utctime' type error'"
self.asn1_utctime = asn1_utctime
self._pyfree = _pyfree
else:
self.asn1_utctime = m2.asn1_utctime_new ()
self._pyfree = 1
def __del__(self):
if getattr(self, '_pyfree', 0):
self.m2_asn1_utctime_free(self.asn1_utctime)
def __str__(self):
assert m2.asn1_utctime_type_check(self.asn1_utctime), "'asn1_utctime' type error'"
buf = BIO.MemoryBuffer()
m2.asn1_utctime_print( buf.bio_ptr(), self.asn1_utctime )
return buf.read_all()
def _ptr(self):
assert m2.asn1_utctime_type_check(self.asn1_utctime), "'asn1_utctime' type error'"
return self.asn1_utctime
def set_string (self, string):
"""
Set time from UTC string.
"""
assert m2.asn1_utctime_type_check(self.asn1_utctime), "'asn1_utctime' type error'"
return m2.asn1_utctime_set_string( self.asn1_utctime, string )
def set_time (self, time):
"""
Set time from seconds since epoch (long).
"""
assert m2.asn1_utctime_type_check(self.asn1_utctime), "'asn1_utctime' type error'"
return m2.asn1_utctime_set( self.asn1_utctime, time )
def get_datetime(self):
date = str(self)
timezone = None
if ' ' not in date:
raise ValueError("Invalid date: %s" % date)
month, rest = date.split(' ', 1)
if month not in self._ssl_months:
raise ValueError("Invalid date %s: Invalid month: %s" % (date, m))
if rest.endswith(' GMT'):
timezone = UTC
rest = rest[:-4]
tm = list(time.strptime(rest, "%d %H:%M:%S %Y"))[:6]
tm[1] = self._ssl_months.index(month) + 1
tm.append(0)
tm.append(timezone)
return datetime.datetime(*tm)
def set_datetime(self, date):
local = LocalTimezone()
if date.tzinfo is None:
date = date.replace(tzinfo=local)
date = date.astimezone(local)
return self.set_time(int(time.mktime(date.timetuple())))
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