Gecko [ www.leshallesdegournay.geraud-market.com ]

Name	Size	Permission	Date
__init__.py	1.44 KB	-rw-r--r--	2016-03-26 13:34
__init__.pyc	1.08 KB	-rw-r--r--	2016-03-26 19:02
__init__.pyo	1.08 KB	-rw-r--r--	2016-03-26 19:02
_compat.py	3.8 KB	-rw-r--r--	2016-03-26 13:30
_compat.pyc	3.55 KB	-rw-r--r--	2016-03-26 19:02
_compat.pyo	3.55 KB	-rw-r--r--	2016-03-26 19:02
_version133.py	11.49 KB	-rw-r--r--	2016-03-26 13:31
_version133.pyc	13.23 KB	-rw-r--r--	2016-03-26 19:02
_version133.pyo	13.23 KB	-rw-r--r--	2016-03-26 19:02
_version200.py	14.77 KB	-rw-r--r--	2016-03-26 13:31
_version200.pyc	14.76 KB	-rw-r--r--	2016-03-26 19:02
_version200.pyo	14.76 KB	-rw-r--r--	2016-03-26 19:02
asn1.py	1.74 KB	-rw-r--r--	2016-03-26 13:30
asn1.pyc	1.61 KB	-rw-r--r--	2016-03-26 19:02
asn1.pyo	1.61 KB	-rw-r--r--	2016-03-26 19:02
bigfile.py	5.06 KB	-rw-r--r--	2016-03-26 13:31
bigfile.pyc	4.67 KB	-rw-r--r--	2016-03-26 19:02
bigfile.pyo	4.67 KB	-rw-r--r--	2016-03-26 19:02
cli.py	11.9 KB	-rw-r--r--	2016-03-26 13:31
cli.pyc	12.76 KB	-rw-r--r--	2016-03-26 19:02
cli.pyo	12.76 KB	-rw-r--r--	2016-03-26 19:02
common.py	4.53 KB	-rw-r--r--	2016-03-26 13:30
common.pyc	4.11 KB	-rw-r--r--	2016-03-26 19:02
common.pyo	4.11 KB	-rw-r--r--	2016-03-26 19:02
core.py	1.62 KB	-rw-r--r--	2016-03-26 13:30
core.pyc	1.44 KB	-rw-r--r--	2016-03-26 19:02
core.pyo	1.44 KB	-rw-r--r--	2016-03-26 19:02
key.py	22.33 KB	-rw-r--r--	2016-03-26 13:31
key.pyc	23.36 KB	-rw-r--r--	2016-03-26 19:02
key.pyo	23.36 KB	-rw-r--r--	2016-03-26 19:02
parallel.py	2.25 KB	-rw-r--r--	2016-03-26 13:30
parallel.pyc	2.01 KB	-rw-r--r--	2016-03-26 19:02
parallel.pyo	2.01 KB	-rw-r--r--	2016-03-26 19:02
pem.py	3.45 KB	-rw-r--r--	2016-03-26 13:31
pem.pyc	2.75 KB	-rw-r--r--	2016-03-26 19:02
pem.pyo	2.75 KB	-rw-r--r--	2016-03-26 19:02
pkcs1.py	11.94 KB	-rw-r--r--	2016-03-26 13:31
pkcs1.pyc	10.87 KB	-rw-r--r--	2016-03-26 19:02
pkcs1.pyo	10.83 KB	-rw-r--r--	2016-03-26 19:02
prime.py	4.45 KB	-rw-r--r--	2016-03-26 13:31
prime.pyc	3.54 KB	-rw-r--r--	2016-03-26 19:02
prime.pyo	3.49 KB	-rw-r--r--	2016-03-26 19:02
randnum.py	2.58 KB	-rw-r--r--	2016-03-26 13:30
randnum.pyc	2.01 KB	-rw-r--r--	2016-03-26 19:02
randnum.pyo	2.01 KB	-rw-r--r--	2016-03-26 19:02
transform.py	6.73 KB	-rw-r--r--	2016-03-26 13:30
transform.pyc	5.67 KB	-rw-r--r--	2016-03-26 19:02
transform.pyo	5.67 KB	-rw-r--r--	2016-03-26 19:02
util.py	2.99 KB	-rw-r--r--	2016-03-26 13:30
util.pyc	2.38 KB	-rw-r--r--	2016-03-26 19:02
util.pyo	2.3 KB	-rw-r--r--	2016-03-26 19:02
varblock.py	5.28 KB	-rw-r--r--	2016-03-26 13:31
varblock.pyc	4.7 KB	-rw-r--r--	2016-03-26 19:02
varblock.pyo	4.7 KB	-rw-r--r--	2016-03-26 19:02

Rename

# -*- coding: utf-8 -*-
#
#  Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu>
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

"""Functions for generating random numbers."""

# Source inspired by code by Yesudeep Mangalapilly <yesudeep@gmail.com>

import os

from rsa import common, transform
from rsa._compat import byte

def read_random_bits(nbits):
    """Reads 'nbits' random bits.

If nbits isn't a whole number of bytes, an extra byte will be appended with
    only the lower bits set.
    """

nbytes, rbits = divmod(nbits, 8)

# Get the random bytes
    randomdata = os.urandom(nbytes)

# Add the remaining random bits
    if rbits > 0:
        randomvalue = ord(os.urandom(1))
        randomvalue >>= (8 - rbits)
        randomdata = byte(randomvalue) + randomdata

return randomdata

def read_random_int(nbits):
    """Reads a random integer of approximately nbits bits.
    """

randomdata = read_random_bits(nbits)
    value = transform.bytes2int(randomdata)

# Ensure that the number is large enough to just fill out the required
    # number of bits.
    value |= 1 << (nbits - 1)

return value

def read_random_odd_int(nbits):
    """Reads a random odd integer of approximately nbits bits.

>>> read_random_odd_int(512) & 1
    1
    """

value = read_random_int(nbits)

# Make sure it's odd
    return value | 1

def randint(maxvalue):
    """Returns a random integer x with 1 <= x <= maxvalue

May take a very long time in specific situations. If maxvalue needs N bits
    to store, the closer maxvalue is to (2 ** N) - 1, the faster this function
    is.
    """

bit_size = common.bit_size(maxvalue)

tries = 0
    while True:
        value = read_random_int(bit_size)
        if value <= maxvalue:
            break

if tries and tries % 10 == 0:
            # After a lot of tries to get the right number of bits but still
            # smaller than maxvalue, decrease the number of bits by 1. That'll
            # dramatically increase the chances to get a large enough number.
            bit_size -= 1
        tries += 1

return value