ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

PATH: usr / lib64 / python2.7 / site-packages / dns

# Copyright (C) 2009, 2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

import os
import time
try:
    import threading as _threading
except ImportError:
    import dummy_threading as _threading

class EntropyPool(object):
    def __init__(self, seed=None):
        self.pool_index = 0
        self.digest = None
        self.next_byte = 0
        self.lock = _threading.Lock()
        try:
            import hashlib
            self.hash = hashlib.sha1()
            self.hash_len = 20
        except:
            try:
                import sha
                self.hash = sha.new()
                self.hash_len = 20
            except:
                import md5
                self.hash = md5.new()
                self.hash_len = 16
        self.pool = '\0' * self.hash_len
        if not seed is None:
            self.stir(seed)
            self.seeded = True
        else:
            self.seeded = False

def stir(self, entropy, already_locked=False):
        if not already_locked:
            self.lock.acquire()
        try:
            bytes = [ord(c) for c in self.pool]
            for c in entropy:
                if self.pool_index == self.hash_len:
                    self.pool_index = 0
                b = ord(c) & 0xff
                bytes[self.pool_index] ^= b
                self.pool_index += 1
            self.pool = ''.join([chr(c) for c in bytes])
        finally:
            if not already_locked:
                self.lock.release()

def _maybe_seed(self):
        if not self.seeded:
            try:
                seed = os.urandom(16)
            except:
                try:
                    r = file('/dev/urandom', 'r', 0)
                    try:
                        seed = r.read(16)
                    finally:
                        r.close()
                except:
                    seed = str(time.time())
            self.seeded = True
            self.stir(seed, True)

def random_8(self):
        self.lock.acquire()
        self._maybe_seed()
        try:
            if self.digest is None or self.next_byte == self.hash_len:
                self.hash.update(self.pool)
                self.digest = self.hash.digest()
                self.stir(self.digest, True)
                self.next_byte = 0
            value = ord(self.digest[self.next_byte])
            self.next_byte += 1
        finally:
            self.lock.release()
        return value

def random_16(self):
        return self.random_8() * 256 + self.random_8()

def random_32(self):
        return self.random_16() * 65536 + self.random_16()

def random_between(self, first, last):
        size = last - first + 1
        if size > 4294967296L:
            raise ValueError('too big')
        if size > 65536:
            rand = self.random_32
            max = 4294967295L
        elif size > 256:
            rand = self.random_16
            max = 65535
        else:
            rand = self.random_8
            max = 255
	return (first + size * rand() // (max + 1))

pool = EntropyPool()

def random_16():
    return pool.random_16()

def between(first, last):
    return pool.random_between(first, last)

[-] node.pyo [edit]
[-] tokenizer.pyc [edit]
[-] tokenizer.py [edit]
[-] e164.pyc [edit]
[-] rcode.pyc [edit]
[-] rdataset.pyc [edit]
[-] inet.pyc [edit]
[-] __init__.pyo [edit]
[-] rdataclass.pyo [edit]
[-] edns.py [edit]
[-] flags.py [edit]
[-] tsig.py [edit]
[-] update.pyo [edit]
[-] edns.pyo [edit]
[-] renderer.py [edit]
[-] message.py [edit]
[-] dnssec.py [edit]
[-] query.py [edit]
[-] ttl.pyc [edit]
[-] opcode.py [edit]
[-] rcode.pyo [edit]
[+] ..
[-] reversename.py [edit]
[-] tsig.pyo [edit]
[-] rdatatype.pyc [edit]
[-] dnssec.pyo [edit]
[-] resolver.pyo [edit]
[-] renderer.pyc [edit]
[-] e164.pyo [edit]
[-] rdataset.py [edit]
[-] inet.pyo [edit]
[-] rdatatype.py [edit]
[-] query.pyo [edit]
[-] zone.py [edit]
[-] ipv6.py [edit]
[-] __init__.pyc [edit]
[-] namedict.py [edit]
[-] hash.py [edit]
[-] ipv6.pyo [edit]
[-] grange.pyc [edit]
[-] set.pyc [edit]
[-] inet.py [edit]
[-] exception.pyc [edit]
[-] rdataclass.py [edit]
[-] rrset.pyc [edit]
[-] edns.pyc [edit]
[-] zone.pyo [edit]
[-] ttl.pyo [edit]
[-] grange.pyo [edit]
[-] dnssec.pyc [edit]
[-] e164.py [edit]
[-] message.pyc [edit]
[-] rrset.pyo [edit]
[-] entropy.pyo [edit]
[-] flags.pyc [edit]
[-] node.pyc [edit]
[+] rdtypes
[-] rdata.py [edit]
[-] ipv4.pyo [edit]
[-] hash.pyo [edit]
[-] rdata.pyo [edit]
[-] version.pyo [edit]
[-] exception.py [edit]
[-] tsigkeyring.pyc [edit]
[-] rcode.py [edit]
[-] rdata.pyc [edit]
[-] wiredata.py [edit]
[-] opcode.pyo [edit]
[-] message.pyo [edit]
[-] name.pyc [edit]
[-] version.py [edit]
[-] ttl.py [edit]
[-] update.py [edit]
[-] wiredata.pyc [edit]
[-] grange.py [edit]
[-] ipv6.pyc [edit]
[-] tokenizer.pyo [edit]
[-] name.py [edit]
[-] version.pyc [edit]
[-] namedict.pyc [edit]
[-] hash.pyc [edit]
[-] name.pyo [edit]
[-] tsigkeyring.pyo [edit]
[-] zone.pyc [edit]
[-] renderer.pyo [edit]
[-] set.py [edit]
[-] resolver.py [edit]
[-] rdataset.pyo [edit]
[-] reversename.pyc [edit]
[-] namedict.pyo [edit]
[-] __init__.py [edit]
[-] set.pyo [edit]
[-] entropy.py [edit]
[-] opcode.pyc [edit]
[-] flags.pyo [edit]
[-] resolver.pyc [edit]
[-] ipv4.pyc [edit]
[-] wiredata.pyo [edit]
[-] ipv4.py [edit]
[-] node.py [edit]
[-] entropy.pyc [edit]
[-] tsig.pyc [edit]
[-] query.pyc [edit]
[-] tsigkeyring.py [edit]
[-] rdatatype.pyo [edit]
[-] rdataclass.pyc [edit]
[-] update.pyc [edit]
[-] rrset.py [edit]
[-] exception.pyo [edit]
[-] reversename.pyo [edit]