Remove third_party/twisted_8_1

third_party/twisted_8_1/twisted/conch/ssh/common.py

-# -*- test-case-name: twisted.conch.test.test_ssh -*-
-# Copyright (c) 2001-2007 Twisted Matrix Laboratories.
-# See LICENSE for details.
-
-
-"""
-Common functions for the SSH classes.
-
-Maintainer: U{Paul Swartz<mailto:z3p@twistedmatrix.com>}
-"""
-
-import struct, warnings
-
-try:
-    from Crypto import Util
-except ImportError:
-    warnings.warn("PyCrypto not installed, but continuing anyways!",
-            RuntimeWarning)
-
-from twisted.python import randbytes
-
-class Entropy(object):
-    """
-    A Crypto.Util.randpool.RandomPool mock for compatibility.
-    """
-    def get_bytes(self, numBytes):
-        """
-        Get a number of random bytes.
-        """
-        warnings.warn("entropy.get_bytes is deprecated, please use "
-                      "twisted.python.randbytes.secureRandom instead.",
-            category=DeprecationWarning, stacklevel=2)
-        return randbytes.secureRandom(numBytes)
-
-entropy = Entropy()
-
-
-def NS(t):
-    """
-    net string
-    """
-    return struct.pack('!L',len(t)) + t
-
-def getNS(s, count=1):
-    """
-    get net string
-    """
-    ns = []
-    c = 0
-    for i in range(count):
-        l, = struct.unpack('!L',s[c:c+4])
-        ns.append(s[c+4:4+l+c])
-        c += 4 + l
-    return tuple(ns) + (s[c:],)
-
-def MP(number):
-    if number==0: return '\000'*4
-    assert number>0
-    bn = Util.number.long_to_bytes(number)
-    if ord(bn[0])&128:
-        bn = '\000' + bn
-    return struct.pack('>L',len(bn)) + bn
-
-def getMP(data, count=1):
-    """
-    Get multiple precision integer out of the string.  A multiple precision
-    integer is stored as a 4-byte length followed by length bytes of the
-    integer.  If count is specified, get count integers out of the string.
-    The return value is a tuple of count integers followed by the rest of
-    the data.
-    """
-    mp = []
-    c = 0
-    for i in range(count):
-        length, = struct.unpack('>L',data[c:c+4])
-        mp.append(Util.number.bytes_to_long(data[c+4:c+4+length]))
-        c += 4 + length
-    return tuple(mp) + (data[c:],)
-
-def _MPpow(x, y, z):
-    """return the MP version of (x**y)%z
-    """
-    return MP(pow(x,y,z))
-
-def ffs(c, s):
-    """
-    first from second
-    goes through the first list, looking for items in the second, returns the first one
-    """
-    for i in c:
-        if i in s: return i
-
-getMP_py = getMP
-MP_py = MP
-_MPpow_py = _MPpow
-pyPow = pow
-
-def _fastgetMP(data, count=1):
-    mp = []
-    c = 0
-    for i in range(count):
-        length = struct.unpack('!L', data[c:c+4])[0]
-        mp.append(long(gmpy.mpz(data[c + 4:c + 4 + length][::-1] + '\x00', 256)))
-        c += length + 4
-    return tuple(mp) + (data[c:],)
-
-def _fastMP(i):
-    i2 = gmpy.mpz(i).binary()[::-1]
-    return struct.pack('!L', len(i2)) + i2
-
-def _fastMPpow(x, y, z=None):
-    r = pyPow(gmpy.mpz(x),y,z).binary()[::-1]
-    return struct.pack('!L', len(r)) + r
-
-def _fastpow(x, y, z=None):
-    return pyPow(gmpy.mpz(x), y, z)
-
-def install():
-    global getMP, MP, _MPpow
-    getMP = _fastgetMP
-    MP = _fastMP
-    _MPpow = _fastMPpow
-    __builtins__['pow'] = _fastpow # evil evil
-
-try:
-    import gmpy
-    install()
-except ImportError:
-    pass
-