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# coding: utf-8

"""
Miscellaneous data helpers, including functions for converting integers to and
from bytes and UTC timezone. Exports the following items:

 - OrderedDict()
 - int_from_bytes()
 - int_to_bytes()
 - timezone.utc
 - inet_ntop()
 - inet_pton()
 - uri_to_iri()
 - iri_to_uri()
"""

from __future__ import unicode_literals, division, absolute_import, print_function

import math
import sys
from datetime import datetime, date, time

from ._errors import unwrap
from ._iri import iri_to_uri, uri_to_iri  # noqa
from ._ordereddict import OrderedDict  # noqa
from ._types import type_name

if sys.platform == 'win32':
    from ._inet import inet_ntop, inet_pton
else:
    from socket import inet_ntop, inet_pton  # noqa


# Python 2
if sys.version_info <= (3,):

    from datetime import timedelta, tzinfo

    py2 = True

    def int_to_bytes(value, signed=False, width=None):
        """
        Converts an integer to a byte string

        :param value:
            The integer to convert

        :param signed:
            If the byte string should be encoded using two's complement

        :param width:
            None == auto, otherwise an integer of the byte width for the return
            value

        :return:
            A byte string
        """

        # Handle negatives in two's complement
        is_neg = False
        if signed and value < 0:
            is_neg = True
            bits = int(math.ceil(len('%x' % abs(value)) / 2.0) * 8)
            value = (value + (1 << bits)) % (1 << bits)

        hex_str = '%x' % value
        if len(hex_str) & 1:
            hex_str = '0' + hex_str

        output = hex_str.decode('hex')

        if signed and not is_neg and ord(output[0:1]) & 0x80:
            output = b'\x00' + output

        if width is not None:
            if is_neg:
                pad_char = b'\xFF'
            else:
                pad_char = b'\x00'
            output = (pad_char * (width - len(output))) + output
        elif is_neg and ord(output[0:1]) & 0x80 == 0:
            output = b'\xFF' + output

        return output

    def int_from_bytes(value, signed=False):
        """
        Converts a byte string to an integer

        :param value:
            The byte string to convert

        :param signed:
            If the byte string should be interpreted using two's complement

        :return:
            An integer
        """

        if value == b'':
            return 0

        num = long(value.encode("hex"), 16)  # noqa

        if not signed:
            return num

        # Check for sign bit and handle two's complement
        if ord(value[0:1]) & 0x80:
            bit_len = len(value) * 8
            return num - (1 << bit_len)

        return num

    class utc(tzinfo):  # noqa

        def tzname(self, _):
            return b'UTC+00:00'

        def utcoffset(self, _):
            return timedelta(0)

        def dst(self, _):
            return timedelta(0)

    class timezone():  # noqa

        utc = utc()


# Python 3
else:

    from datetime import timezone  # noqa

    py2 = False

    def int_to_bytes(value, signed=False, width=None):
        """
        Converts an integer to a byte string

        :param value:
            The integer to convert

        :param signed:
            If the byte string should be encoded using two's complement

        :param width:
            None == auto, otherwise an integer of the byte width for the return
            value

        :return:
            A byte string
        """

        if width is None:
            if signed:
                if value < 0:
                    bits_required = abs(value + 1).bit_length()
                else:
                    bits_required = value.bit_length()
                if bits_required % 8 == 0:
                    bits_required += 1
            else:
                bits_required = value.bit_length()
            width = math.ceil(bits_required / 8) or 1
        return value.to_bytes(width, byteorder='big', signed=signed)

    def int_from_bytes(value, signed=False):
        """
        Converts a byte string to an integer

        :param value:
            The byte string to convert

        :param signed:
            If the byte string should be interpreted using two's complement

        :return:
            An integer
        """

        return int.from_bytes(value, 'big', signed=signed)


_DAYS_PER_MONTH_YEAR_0 = {
    1: 31,
    2: 29,  # Year 0 was a leap year
    3: 31,
    4: 30,
    5: 31,
    6: 30,
    7: 31,
    8: 31,
    9: 30,
    10: 31,
    11: 30,
    12: 31
}


class extended_date(object):
    """
    A datetime.date-like object that can represent the year 0. This is just
    to handle 0000-01-01 found in some certificates.
    """

    year = None
    month = None
    day = None

    def __init__(self, year, month, day):
        """
        :param year:
            The integer 0

        :param month:
            An integer from 1 to 12

        :param day:
            An integer from 1 to 31
        """

        if year != 0:
            raise ValueError('year must be 0')

        if month < 1 or month > 12:
            raise ValueError('month is out of range')

        if day < 0 or day > _DAYS_PER_MONTH_YEAR_0[month]:
            raise ValueError('day is out of range')

        self.year = year
        self.month = month
        self.day = day

    def _format(self, format):
        """
        Performs strftime(), always returning a unicode string

        :param format:
            A strftime() format string

        :return:
            A unicode string of the formatted date
        """

        format = format.replace('%Y', '0000')
        # Year 0 is 1BC and a leap year. Leap years repeat themselves
        # every 28 years. Because of adjustments and the proleptic gregorian
        # calendar, the simplest way to format is to substitute year 2000.
        temp = date(2000, self.month, self.day)
        if '%c' in format:
            c_out = temp.strftime('%c')
            # Handle full years
            c_out = c_out.replace('2000', '0000')
            c_out = c_out.replace('%', '%%')
            format = format.replace('%c', c_out)
        if '%x' in format:
            x_out = temp.strftime('%x')
            # Handle formats such as 08/16/2000 or 16.08.2000
            x_out = x_out.replace('2000', '0000')
            x_out = x_out.replace('%', '%%')
            format = format.replace('%x', x_out)
        return temp.strftime(format)

    def isoformat(self):
        """
        Formats the date as %Y-%m-%d

        :return:
            The date formatted to %Y-%m-%d as a unicode string in Python 3
            and a byte string in Python 2
        """

        return self.strftime('0000-%m-%d')

    def strftime(self, format):
        """
        Formats the date using strftime()

        :param format:
            The strftime() format string

        :return:
            The formatted date as a unicode string in Python 3 and a byte
            string in Python 2
        """

        output = self._format(format)
        if py2:
            return output.encode('utf-8')
        return output

    def replace(self, year=None, month=None, day=None):
        """
        Returns a new datetime.date or asn1crypto.util.extended_date
        object with the specified components replaced

        :return:
            A datetime.date or asn1crypto.util.extended_date object
        """

        if year is None:
            year = self.year
        if month is None:
            month = self.month
        if day is None:
            day = self.day

        if year > 0:
            cls = date
        else:
            cls = extended_date

        return cls(
            year,
            month,
            day
        )

    def __str__(self):
        if py2:
            return self.__bytes__()
        else:
            return self.__unicode__()

    def __bytes__(self):
        return self.__unicode__().encode('utf-8')

    def __unicode__(self):
        return self._format('%Y-%m-%d')

    def __eq__(self, other):
        if not isinstance(other, self.__class__):
            return False
        return self.__cmp__(other) == 0

    def __ne__(self, other):
        return not self.__eq__(other)

    def _comparison_error(self, other):
        raise TypeError(unwrap(
            '''
            An asn1crypto.util.extended_date object can only be compared to
            an asn1crypto.util.extended_date or datetime.date object, not %s
            ''',
            type_name(other)
        ))

    def __cmp__(self, other):
        if isinstance(other, date):
            return -1

        if not isinstance(other, self.__class__):
            self._comparison_error(other)

        st = (
            self.year,
            self.month,
            self.day
        )
        ot = (
            other.year,
            other.month,
            other.day
        )

        if st < ot:
            return -1
        if st > ot:
            return 1
        return 0

    def __lt__(self, other):
        return self.__cmp__(other) < 0

    def __le__(self, other):
        return self.__cmp__(other) <= 0

    def __gt__(self, other):
        return self.__cmp__(other) > 0

    def __ge__(self, other):
        return self.__cmp__(other) >= 0


class extended_datetime(object):
    """
    A datetime.datetime-like object that can represent the year 0. This is just
    to handle 0000-01-01 found in some certificates.
    """

    year = None
    month = None
    day = None
    hour = None
    minute = None
    second = None
    microsecond = None
    tzinfo = None

    def __init__(self, year, month, day, hour=0, minute=0, second=0, microsecond=0, tzinfo=None):
        """
        :param year:
            The integer 0

        :param month:
            An integer from 1 to 12

        :param day:
            An integer from 1 to 31

        :param hour:
            An integer from 0 to 23

        :param minute:
            An integer from 0 to 59

        :param second:
            An integer from 0 to 59

        :param microsecond:
            An integer from 0 to 999999
        """

        if year != 0:
            raise ValueError('year must be 0')

        if month < 1 or month > 12:
            raise ValueError('month is out of range')

        if day < 0 or day > _DAYS_PER_MONTH_YEAR_0[month]:
            raise ValueError('day is out of range')

        if hour < 0 or hour > 23:
            raise ValueError('hour is out of range')

        if minute < 0 or minute > 59:
            raise ValueError('minute is out of range')

        if second < 0 or second > 59:
            raise ValueError('second is out of range')

        if microsecond < 0 or microsecond > 999999:
            raise ValueError('microsecond is out of range')

        self.year = year
        self.month = month
        self.day = day
        self.hour = hour
        self.minute = minute
        self.second = second
        self.microsecond = microsecond
        self.tzinfo = tzinfo

    def date(self):
        """
        :return:
            An asn1crypto.util.extended_date of the date
        """

        return extended_date(self.year, self.month, self.day)

    def time(self):
        """
        :return:
            A datetime.time object of the time
        """

        return time(self.hour, self.minute, self.second, self.microsecond, self.tzinfo)

    def utcoffset(self):
        """
        :return:
            None or a datetime.timedelta() of the offset from UTC
        """

        if self.tzinfo is None:
            return None
        return self.tzinfo.utcoffset(self.replace(year=2000))

    def dst(self):
        """
        :return:
            None or a datetime.timedelta() of the daylight savings time offset
        """

        if self.tzinfo is None:
            return None
        return self.tzinfo.dst(self.replace(year=2000))

    def tzname(self):
        """
        :return:
            None or the name of the timezone as a unicode string in Python 3
            and a byte string in Python 2
        """

        if self.tzinfo is None:
            return None
        return self.tzinfo.tzname(self.replace(year=2000))

    def _format(self, format):
        """
        Performs strftime(), always returning a unicode string

        :param format:
            A strftime() format string

        :return:
            A unicode string of the formatted datetime
        """

        format = format.replace('%Y', '0000')
        # Year 0 is 1BC and a leap year. Leap years repeat themselves
        # every 28 years. Because of adjustments and the proleptic gregorian
        # calendar, the simplest way to format is to substitute year 2000.
        temp = datetime(
            2000,
            self.month,
            self.day,
            self.hour,
            self.minute,
            self.second,
            self.microsecond,
            self.tzinfo
        )
        if '%c' in format:
            c_out = temp.strftime('%c')
            # Handle full years
            c_out = c_out.replace('2000', '0000')
            c_out = c_out.replace('%', '%%')
            format = format.replace('%c', c_out)
        if '%x' in format:
            x_out = temp.strftime('%x')
            # Handle formats such as 08/16/2000 or 16.08.2000
            x_out = x_out.replace('2000', '0000')
            x_out = x_out.replace('%', '%%')
            format = format.replace('%x', x_out)
        return temp.strftime(format)

    def isoformat(self, sep='T'):
        """
        Formats the date as "%Y-%m-%d %H:%M:%S" with the sep param between the
        date and time portions

        :param set:
            A single character of the separator to place between the date and
            time

        :return:
            The formatted datetime as a unicode string in Python 3 and a byte
            string in Python 2
        """

        if self.microsecond == 0:
            return self.strftime('0000-%%m-%%d%s%%H:%%M:%%S' % sep)
        return self.strftime('0000-%%m-%%d%s%%H:%%M:%%S.%%f' % sep)

    def strftime(self, format):
        """
        Formats the date using strftime()

        :param format:
            The strftime() format string

        :return:
            The formatted date as a unicode string in Python 3 and a byte
            string in Python 2
        """

        output = self._format(format)
        if py2:
            return output.encode('utf-8')
        return output

    def replace(self, year=None, month=None, day=None, hour=None, minute=None,
                second=None, microsecond=None, tzinfo=None):
        """
        Returns a new datetime.datetime or asn1crypto.util.extended_datetime
        object with the specified components replaced

        :return:
            A datetime.datetime or asn1crypto.util.extended_datetime object
        """

        if year is None:
            year = self.year
        if month is None:
            month = self.month
        if day is None:
            day = self.day
        if hour is None:
            hour = self.hour
        if minute is None:
            minute = self.minute
        if second is None:
            second = self.second
        if microsecond is None:
            microsecond = self.microsecond
        if tzinfo is None:
            tzinfo = self.tzinfo

        if year > 0:
            cls = datetime
        else:
            cls = extended_datetime

        return cls(
            year,
            month,
            day,
            hour,
            minute,
            second,
            microsecond,
            tzinfo
        )

    def __str__(self):
        if py2:
            return self.__bytes__()
        else:
            return self.__unicode__()

    def __bytes__(self):
        return self.__unicode__().encode('utf-8')

    def __unicode__(self):
        format = '%Y-%m-%d %H:%M:%S'
        if self.microsecond != 0:
            format += '.%f'
        return self._format(format)

    def __eq__(self, other):
        if not isinstance(other, self.__class__):
            return False
        return self.__cmp__(other) == 0

    def __ne__(self, other):
        return not self.__eq__(other)

    def _comparison_error(self, other):
        """
        Raises a TypeError about the other object not being suitable for
        comparison

        :param other:
            The object being compared to
        """

        raise TypeError(unwrap(
            '''
            An asn1crypto.util.extended_datetime object can only be compared to
            an asn1crypto.util.extended_datetime or datetime.datetime object,
            not %s
            ''',
            type_name(other)
        ))

    def __cmp__(self, other):
        so = self.utcoffset()
        oo = other.utcoffset()

        if (so is not None and oo is None) or (so is None and oo is not None):
            raise TypeError("can't compare offset-naive and offset-aware datetimes")

        if isinstance(other, datetime):
            return -1

        if not isinstance(other, self.__class__):
            self._comparison_error(other)

        st = (
            self.year,
            self.month,
            self.day,
            self.hour,
            self.minute,
            self.second,
            self.microsecond,
            so
        )
        ot = (
            other.year,
            other.month,
            other.day,
            other.hour,
            other.minute,
            other.second,
            other.microsecond,
            oo
        )

        if st < ot:
            return -1
        if st > ot:
            return 1
        return 0

    def __lt__(self, other):
        return self.__cmp__(other) < 0

    def __le__(self, other):
        return self.__cmp__(other) <= 0

    def __gt__(self, other):
        return self.__cmp__(other) > 0

    def __ge__(self, other):
        return self.__cmp__(other) >= 0

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 0755
_perf Folder 0755
__init__.py File 209 B 0644
_elliptic_curve.py File 9.2 KB 0644
_errors.py File 967 B 0644
_ffi.py File 738 B 0644
_inet.py File 4.55 KB 0644
_int.py File 4.51 KB 0644
_iri.py File 8.43 KB 0644
_ordereddict.py File 4.43 KB 0644
_teletex_codec.py File 4.93 KB 0644
_types.py File 939 B 0644
algos.py File 33.3 KB 0644
cms.py File 24.53 KB 0644
core.py File 153.57 KB 0644
crl.py File 15.73 KB 0644
csr.py File 2.09 KB 0644
keys.py File 34.36 KB 0644
ocsp.py File 17.38 KB 0644
parser.py File 8.93 KB 0644
pdf.py File 2.2 KB 0644
pem.py File 6 KB 0644
pkcs12.py File 4.46 KB 0644
tsp.py File 7.64 KB 0644
util.py File 17.62 KB 0644
version.py File 154 B 0644
x509.py File 90.14 KB 0644