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test_name.py
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1288 lines (1061 loc) · 42.6 KB
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# -*- coding: utf-8
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# Copyright (C) 2003-2017 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 copy
import operator
import pickle
import unittest
from io import BytesIO
from typing import Dict # pylint: disable=unused-import
import dns.e164
import dns.name
import dns.reversename
# pylint: disable=line-too-long,unsupported-assignment-operation
def expand(text):
# This is a helper routine to expand name patterns for RFC 4471 tests.
#
# Basically it turns <character>{<n>} into <n> instances of the character.
# For example:
#
# r"fo{2}.example." => r"foo.example.".
#
# Two characters get special treatment:
# "-" is mapped to r"\000" and "+" is mapped to r"\255". For example
#
# r"+{3}-.example." -> r"\255\255\255\000.example."
#
# We do this just to make parsing simpler, so we don't have to process escapes
# ourselves.
i = 0
l = len(text)
previous = ""
reading_count = False
count = 0
expanded = []
for c in text:
if c == "-":
c = r"\000"
elif c == "+":
c = r"\255"
if reading_count:
assert len(c) == 1
if c >= "0" and c <= "9":
count *= 10
count += ord(c) - ord("0")
elif c == "}":
expanded.append(previous * count)
previous = ""
reading_count = False
count = 0
elif c == "{":
reading_count = True
else:
expanded.append(previous)
previous = c
# don't forget the last char (if there is one)
expanded.append(previous)
x = "".join(expanded)
return x
class NameTestCase(unittest.TestCase):
def setUp(self):
self.origin = dns.name.from_text("example.")
def testFromTextRel1(self):
n = dns.name.from_text("foo.bar")
self.assertEqual(n.labels, (b"foo", b"bar", b""))
def testFromTextRel2(self):
n = dns.name.from_text("foo.bar", origin=self.origin)
self.assertEqual(n.labels, (b"foo", b"bar", b"example", b""))
def testFromTextRel3(self):
n = dns.name.from_text("foo.bar", origin=None)
self.assertEqual(n.labels, (b"foo", b"bar"))
def testFromTextRel4(self):
n = dns.name.from_text("@", origin=None)
self.assertEqual(n, dns.name.empty)
def testFromTextRel5(self):
n = dns.name.from_text("@", origin=self.origin)
self.assertEqual(n, self.origin)
def testFromTextAbs1(self):
n = dns.name.from_text("foo.bar.")
self.assertEqual(n.labels, (b"foo", b"bar", b""))
def testTortureFromText(self):
good = [
rb".",
rb"a",
rb"a.",
rb"a" * 63,
(rb"a" * 63 + rb".") * 3 + rb"a" * 61,
rb"\000.\008.\010.\032.\046.\092.\099.\255",
rb"\\",
rb"\..\.",
rb"\\.\\",
rb'!"#%&/()=+-',
(rb"\255" * 63 + rb".") * 3 + rb"\255" * 61,
]
bad = [
rb"..",
rb".a",
rb"\\..",
b"\\", # yes, we don't want the 'r' prefix!
rb"\0",
rb"\00",
rb"\00Z",
rb"a" * 64,
(rb"a" * 63 + rb".") * 3 + rb"a" * 62,
(rb"\255" * 63 + rb".") * 3 + rb"\255" * 62,
]
for t in good:
try:
dns.name.from_text(t)
except Exception:
self.fail("good test '%r' raised an exception" % t)
for t in bad:
caught = False
try:
dns.name.from_text(t)
except Exception:
caught = True
if not caught:
self.fail("bad test '%r' did not raise an exception" % t)
def testImmutable1(self):
def bad():
self.origin.labels = ()
self.assertRaises(TypeError, bad)
def testImmutable2(self):
def bad():
self.origin.labels[0] = "foo" # type: ignore
self.assertRaises(TypeError, bad)
def testAbs1(self):
self.assertTrue(dns.name.root.is_absolute())
def testAbs2(self):
self.assertFalse(dns.name.empty.is_absolute())
def testAbs3(self):
self.assertTrue(self.origin.is_absolute())
def testAbs4(self):
n = dns.name.from_text("foo", origin=None)
self.assertFalse(n.is_absolute())
def testWild1(self):
n = dns.name.from_text("*.foo", origin=None)
self.assertTrue(n.is_wild())
def testWild2(self):
n = dns.name.from_text("*a.foo", origin=None)
self.assertFalse(n.is_wild())
def testWild3(self):
n = dns.name.from_text("a.*.foo", origin=None)
self.assertFalse(n.is_wild())
def testWild4(self):
self.assertFalse(dns.name.root.is_wild())
def testWild5(self):
self.assertFalse(dns.name.empty.is_wild())
def testHash1(self):
n1 = dns.name.from_text("fOo.COM")
n2 = dns.name.from_text("foo.com")
self.assertEqual(hash(n1), hash(n2))
def testCompare1(self):
n1 = dns.name.from_text("a")
n2 = dns.name.from_text("b")
self.assertLess(n1, n2)
self.assertLessEqual(n1, n2)
self.assertGreater(n2, n1)
self.assertGreaterEqual(n2, n1)
def testCompare2(self):
n1 = dns.name.from_text("")
n2 = dns.name.from_text("b")
self.assertLess(n1, n2)
self.assertLessEqual(n1, n2)
self.assertGreater(n2, n1)
self.assertGreaterEqual(n2, n1)
def testCompare3(self):
self.assertLess(dns.name.empty, dns.name.root)
self.assertGreater(dns.name.root, dns.name.empty)
def testCompare4(self):
self.assertNotEqual(dns.name.root, 1)
def testSubdomain1(self):
self.assertFalse(dns.name.empty.is_subdomain(dns.name.root))
def testSubdomain2(self):
self.assertFalse(dns.name.root.is_subdomain(dns.name.empty))
def testSubdomain3(self):
n = dns.name.from_text("foo", origin=self.origin)
self.assertTrue(n.is_subdomain(self.origin))
def testSubdomain4(self):
n = dns.name.from_text("foo", origin=self.origin)
self.assertTrue(n.is_subdomain(dns.name.root))
def testSubdomain5(self):
n = dns.name.from_text("foo", origin=self.origin)
self.assertTrue(n.is_subdomain(n))
def testSuperdomain1(self):
self.assertFalse(dns.name.empty.is_superdomain(dns.name.root))
def testSuperdomain2(self):
self.assertFalse(dns.name.root.is_superdomain(dns.name.empty))
def testSuperdomain3(self):
n = dns.name.from_text("foo", origin=self.origin)
self.assertTrue(self.origin.is_superdomain(n))
def testSuperdomain4(self):
n = dns.name.from_text("foo", origin=self.origin)
self.assertTrue(dns.name.root.is_superdomain(n))
def testSuperdomain5(self):
n = dns.name.from_text("foo", origin=self.origin)
self.assertTrue(n.is_superdomain(n))
def testCanonicalize1(self):
n = dns.name.from_text("FOO.bar", origin=self.origin)
c = n.canonicalize()
self.assertEqual(c.labels, (b"foo", b"bar", b"example", b""))
def testToText1(self):
n = dns.name.from_text("FOO.bar", origin=self.origin)
t = n.to_text()
self.assertEqual(t, "FOO.bar.example.")
def testToText2(self):
n = dns.name.from_text("FOO.bar", origin=self.origin)
t = n.to_text(True)
self.assertEqual(t, "FOO.bar.example")
def testToText3(self):
n = dns.name.from_text("FOO.bar", origin=None)
t = n.to_text()
self.assertEqual(t, "FOO.bar")
def testToText4(self):
t = dns.name.empty.to_text()
self.assertEqual(t, "@")
def testToText5(self):
t = dns.name.root.to_text()
self.assertEqual(t, ".")
def testToText6(self):
n = dns.name.from_text("FOO bar", origin=None)
t = n.to_text()
self.assertEqual(t, r"FOO\032bar")
def testToText7(self):
n = dns.name.from_text(r"FOO\.bar", origin=None)
t = n.to_text()
self.assertEqual(t, r"FOO\.bar")
def testToText8(self):
n = dns.name.from_text(r"\070OO\.bar", origin=None)
t = n.to_text()
self.assertEqual(t, r"FOO\.bar")
def testToText9(self):
n = dns.name.from_text("FOO bar", origin=None)
t = n.to_unicode()
self.assertEqual(t, "FOO\\032bar")
def testToText10(self):
t = dns.name.empty.to_unicode()
self.assertEqual(t, "@")
def testToText11(self):
t = dns.name.root.to_unicode()
self.assertEqual(t, ".")
def testToText12(self):
n = dns.name.from_text(r"a\.b.c")
t = n.to_unicode()
self.assertEqual(t, r"a\.b.c.")
def testToText13(self):
n = dns.name.from_text(r"\150\151\152\153\154\155\156\157\158\159.")
t = n.to_text()
self.assertEqual(t, r"\150\151\152\153\154\155\156\157\158\159.")
def testToText14(self):
# Something that didn't start as unicode should go to escapes and not
# raise due to interpreting arbitrary binary DNS labels as UTF-8.
n = dns.name.from_text(r"\150\151\152\153\154\155\156\157\158\159.")
t = n.to_unicode()
self.assertEqual(t, r"\150\151\152\153\154\155\156\157\158\159.")
def testSlice1(self):
n = dns.name.from_text(r"a.b.c.", origin=None)
s = n[:]
self.assertEqual(s, (b"a", b"b", b"c", b""))
def testSlice2(self):
n = dns.name.from_text(r"a.b.c.", origin=None)
s = n[:2]
self.assertEqual(s, (b"a", b"b"))
def testSlice3(self):
n = dns.name.from_text(r"a.b.c.", origin=None)
s = n[2:]
self.assertEqual(s, (b"c", b""))
def testEmptyLabel1(self):
def bad():
dns.name.Name(["a", "", "b"])
self.assertRaises(dns.name.EmptyLabel, bad)
def testEmptyLabel2(self):
def bad():
dns.name.Name(["", "b"])
self.assertRaises(dns.name.EmptyLabel, bad)
def testEmptyLabel3(self):
n = dns.name.Name(["b", ""])
self.assertTrue(n)
def testLongLabel(self):
n = dns.name.Name(["a" * 63])
self.assertTrue(n)
def testLabelTooLong(self):
def bad():
dns.name.Name(["a" * 64, "b"])
self.assertRaises(dns.name.LabelTooLong, bad)
def testLongName(self):
n = dns.name.Name(["a" * 63, "a" * 63, "a" * 63, "a" * 62])
self.assertTrue(n)
def testNameTooLong(self):
def bad():
dns.name.Name(["a" * 63, "a" * 63, "a" * 63, "a" * 63])
self.assertRaises(dns.name.NameTooLong, bad)
def testConcat1(self):
n1 = dns.name.Name(["a", "b"])
n2 = dns.name.Name(["c", "d"])
e = dns.name.Name(["a", "b", "c", "d"])
r = n1 + n2
self.assertEqual(r, e)
def testConcat2(self):
n1 = dns.name.Name(["a", "b"])
n2 = dns.name.Name([])
e = dns.name.Name(["a", "b"])
r = n1 + n2
self.assertEqual(r, e)
def testConcat3(self):
n1 = dns.name.Name([])
n2 = dns.name.Name(["a", "b"])
e = dns.name.Name(["a", "b"])
r = n1 + n2
self.assertEqual(r, e)
def testConcat4(self):
n1 = dns.name.Name(["a", "b", ""])
n2 = dns.name.Name([])
e = dns.name.Name(["a", "b", ""])
r = n1 + n2
self.assertEqual(r, e)
def testConcat5(self):
n1 = dns.name.Name(["a", "b"])
n2 = dns.name.Name(["c", ""])
e = dns.name.Name(["a", "b", "c", ""])
r = n1 + n2
self.assertEqual(r, e)
def testConcat6(self):
def bad():
n1 = dns.name.Name(["a", "b", ""])
n2 = dns.name.Name(["c"])
return n1 + n2
self.assertRaises(dns.name.AbsoluteConcatenation, bad)
def testBadEscape(self):
def bad():
n = dns.name.from_text(r"a.b\0q1.c.")
self.assertRaises(dns.name.BadEscape, bad)
def testDigestable1(self):
n = dns.name.from_text("FOO.bar")
d = n.to_digestable()
self.assertEqual(d, b"\x03foo\x03bar\x00")
def testDigestable2(self):
n1 = dns.name.from_text("FOO.bar")
n2 = dns.name.from_text("foo.BAR.")
d1 = n1.to_digestable()
d2 = n2.to_digestable()
self.assertEqual(d1, d2)
def testDigestable3(self):
d = dns.name.root.to_digestable()
self.assertEqual(d, b"\x00")
def testDigestable4(self):
n = dns.name.from_text("FOO.bar", None)
d = n.to_digestable(dns.name.root)
self.assertEqual(d, b"\x03foo\x03bar\x00")
def testBadDigestable(self):
def bad():
n = dns.name.from_text("FOO.bar", None)
n.to_digestable()
self.assertRaises(dns.name.NeedAbsoluteNameOrOrigin, bad)
def testToWire1(self):
n = dns.name.from_text("FOO.bar")
f = BytesIO()
compress = {} # type: Dict[dns.name.Name,int]
n.to_wire(f, compress)
self.assertEqual(f.getvalue(), b"\x03FOO\x03bar\x00")
def testToWire2(self):
n = dns.name.from_text("FOO.bar")
f = BytesIO()
compress = {} # type: Dict[dns.name.Name,int]
n.to_wire(f, compress)
n.to_wire(f, compress)
self.assertEqual(f.getvalue(), b"\x03FOO\x03bar\x00\xc0\x00")
def testToWire3(self):
n1 = dns.name.from_text("FOO.bar")
n2 = dns.name.from_text("foo.bar")
f = BytesIO()
compress = {} # type: Dict[dns.name.Name,int]
n1.to_wire(f, compress)
n2.to_wire(f, compress)
self.assertEqual(f.getvalue(), b"\x03FOO\x03bar\x00\xc0\x00")
def testToWire4(self):
n1 = dns.name.from_text("FOO.bar")
n2 = dns.name.from_text("a.foo.bar")
f = BytesIO()
compress = {} # type: Dict[dns.name.Name,int]
n1.to_wire(f, compress)
n2.to_wire(f, compress)
self.assertEqual(f.getvalue(), b"\x03FOO\x03bar\x00\x01\x61\xc0\x00")
def testToWire5(self):
n1 = dns.name.from_text("FOO.bar")
n2 = dns.name.from_text("a.foo.bar")
f = BytesIO()
compress = {} # type: Dict[dns.name.Name,int]
n1.to_wire(f, compress)
n2.to_wire(f, None)
self.assertEqual(f.getvalue(), b"\x03FOO\x03bar\x00\x01\x61\x03foo\x03bar\x00")
def testToWire6(self):
n = dns.name.from_text("FOO.bar")
v = n.to_wire()
self.assertEqual(v, b"\x03FOO\x03bar\x00")
def testToWireRelativeNameWithOrigin(self):
n = dns.name.from_text("FOO", None)
o = dns.name.from_text("bar")
v = n.to_wire(origin=o)
self.assertEqual(v, b"\x03FOO\x03bar\x00")
def testToWireRelativeNameWithoutOrigin(self):
n = dns.name.from_text("FOO", None)
def bad():
v = n.to_wire()
self.assertRaises(dns.name.NeedAbsoluteNameOrOrigin, bad)
def testBadToWire(self):
def bad():
n = dns.name.from_text("FOO.bar", None)
f = BytesIO()
compress = {} # type: Dict[dns.name.Name,int]
n.to_wire(f, compress)
self.assertRaises(dns.name.NeedAbsoluteNameOrOrigin, bad)
def testGiantCompressionTable(self):
# Only the first 16KiB of a message can have compression pointers.
f = BytesIO()
compress = {} # type: Dict[dns.name.Name,int]
# exactly 16 bytes encoded
n = dns.name.from_text("0000000000.com.")
n.to_wire(f, compress)
# There are now two entries in the compression table (for the full
# name, and for the com. suffix.
self.assertEqual(len(compress), 2)
for i in range(1023):
# exactly 16 bytes encoded with compression
n = dns.name.from_text(f"{i:013d}.com")
n.to_wire(f, compress)
# There are now 1025 entries in the compression table with
# the last entry at offset 16368.
self.assertEqual(len(compress), 1025)
self.assertEqual(compress[n], 16368)
# Adding another name should not increase the size of the compression
# table, as the pointer would be at offset 16384, which is too big.
n = dns.name.from_text("toobig.com.")
n.to_wire(f, compress)
self.assertEqual(len(compress), 1025)
def testSplit1(self):
n = dns.name.from_text("foo.bar.")
(prefix, suffix) = n.split(2)
ep = dns.name.from_text("foo", None)
es = dns.name.from_text("bar.", None)
self.assertEqual(prefix, ep)
self.assertEqual(suffix, es)
def testSplit2(self):
n = dns.name.from_text("foo.bar.")
(prefix, suffix) = n.split(1)
ep = dns.name.from_text("foo.bar", None)
es = dns.name.from_text(".", None)
self.assertEqual(prefix, ep)
self.assertEqual(suffix, es)
def testSplit3(self):
n = dns.name.from_text("foo.bar.")
(prefix, suffix) = n.split(0)
ep = dns.name.from_text("foo.bar.", None)
es = dns.name.from_text("", None)
self.assertEqual(prefix, ep)
self.assertEqual(suffix, es)
def testSplit4(self):
n = dns.name.from_text("foo.bar.")
(prefix, suffix) = n.split(3)
ep = dns.name.from_text("", None)
es = dns.name.from_text("foo.bar.", None)
self.assertEqual(prefix, ep)
self.assertEqual(suffix, es)
def testBadSplit1(self):
def bad():
n = dns.name.from_text("foo.bar.")
n.split(-1)
self.assertRaises(ValueError, bad)
def testBadSplit2(self):
def bad():
n = dns.name.from_text("foo.bar.")
n.split(4)
self.assertRaises(ValueError, bad)
def testRelativize1(self):
n = dns.name.from_text("a.foo.bar.", None)
o = dns.name.from_text("bar.", None)
e = dns.name.from_text("a.foo", None)
self.assertEqual(n.relativize(o), e)
def testRelativize2(self):
n = dns.name.from_text("a.foo.bar.", None)
o = n
e = dns.name.empty
self.assertEqual(n.relativize(o), e)
def testRelativize3(self):
n = dns.name.from_text("a.foo.bar.", None)
o = dns.name.from_text("blaz.", None)
e = n
self.assertEqual(n.relativize(o), e)
def testRelativize4(self):
n = dns.name.from_text("a.foo", None)
o = dns.name.root
e = n
self.assertEqual(n.relativize(o), e)
def testDerelativize1(self):
n = dns.name.from_text("a.foo", None)
o = dns.name.from_text("bar.", None)
e = dns.name.from_text("a.foo.bar.", None)
self.assertEqual(n.derelativize(o), e)
def testDerelativize2(self):
n = dns.name.empty
o = dns.name.from_text("a.foo.bar.", None)
e = o
self.assertEqual(n.derelativize(o), e)
def testDerelativize3(self):
n = dns.name.from_text("a.foo.bar.", None)
o = dns.name.from_text("blaz.", None)
e = n
self.assertEqual(n.derelativize(o), e)
def testChooseRelativity1(self):
n = dns.name.from_text("a.foo.bar.", None)
o = dns.name.from_text("bar.", None)
e = dns.name.from_text("a.foo", None)
self.assertEqual(n.choose_relativity(o, True), e)
def testChooseRelativity2(self):
n = dns.name.from_text("a.foo.bar.", None)
o = dns.name.from_text("bar.", None)
e = n
self.assertEqual(n.choose_relativity(o, False), e)
def testChooseRelativity3(self):
n = dns.name.from_text("a.foo", None)
o = dns.name.from_text("bar.", None)
e = dns.name.from_text("a.foo.bar.", None)
self.assertEqual(n.choose_relativity(o, False), e)
def testChooseRelativity4(self):
n = dns.name.from_text("a.foo", None)
o = None
e = n
self.assertEqual(n.choose_relativity(o, True), e)
def testChooseRelativity5(self):
n = dns.name.from_text("a.foo", None)
o = None
e = n
self.assertEqual(n.choose_relativity(o, False), e)
def testChooseRelativity6(self):
n = dns.name.from_text("a.foo.", None)
o = None
e = n
self.assertEqual(n.choose_relativity(o, True), e)
def testChooseRelativity7(self):
n = dns.name.from_text("a.foo.", None)
o = None
e = n
self.assertEqual(n.choose_relativity(o, False), e)
def testFromWire1(self):
w = b"\x03foo\x00\xc0\x00"
(n1, cused1) = dns.name.from_wire(w, 0)
(n2, cused2) = dns.name.from_wire(w, cused1)
en1 = dns.name.from_text("foo.")
en2 = en1
ecused1 = 5
ecused2 = 2
self.assertEqual(n1, en1)
self.assertEqual(cused1, ecused1)
self.assertEqual(n2, en2)
self.assertEqual(cused2, ecused2)
def testFromWire2(self):
w = b"\x03foo\x00\x01a\xc0\x00\x01b\xc0\x05"
current = 0
(n1, cused1) = dns.name.from_wire(w, current)
current += cused1
(n2, cused2) = dns.name.from_wire(w, current)
current += cused2
(n3, cused3) = dns.name.from_wire(w, current)
en1 = dns.name.from_text("foo.")
en2 = dns.name.from_text("a.foo.")
en3 = dns.name.from_text("b.a.foo.")
ecused1 = 5
ecused2 = 4
ecused3 = 4
self.assertEqual(n1, en1)
self.assertEqual(cused1, ecused1)
self.assertEqual(n2, en2)
self.assertEqual(cused2, ecused2)
self.assertEqual(n3, en3)
self.assertEqual(cused3, ecused3)
def testBadFromWire1(self):
def bad():
w = b"\x03foo\xc0\x04"
dns.name.from_wire(w, 0)
self.assertRaises(dns.name.BadPointer, bad)
def testBadFromWire2(self):
def bad():
w = b"\x03foo\xc0\x05"
dns.name.from_wire(w, 0)
self.assertRaises(dns.name.BadPointer, bad)
def testBadFromWire3(self):
def bad():
w = b"\xbffoo"
dns.name.from_wire(w, 0)
self.assertRaises(dns.name.BadLabelType, bad)
def testBadFromWire4(self):
def bad():
w = b"\x41foo"
dns.name.from_wire(w, 0)
self.assertRaises(dns.name.BadLabelType, bad)
def testParent1(self):
n = dns.name.from_text("foo.bar.")
self.assertEqual(n.parent(), dns.name.from_text("bar."))
self.assertEqual(n.parent().parent(), dns.name.root)
def testParent2(self):
n = dns.name.from_text("foo.bar", None)
self.assertEqual(n.parent(), dns.name.from_text("bar", None))
self.assertEqual(n.parent().parent(), dns.name.empty)
def testParent3(self):
def bad():
n = dns.name.root
n.parent()
self.assertRaises(dns.name.NoParent, bad)
def testParent4(self):
def bad():
n = dns.name.empty
n.parent()
self.assertRaises(dns.name.NoParent, bad)
def testFromUnicode1(self):
n = dns.name.from_text("foo.bar")
self.assertEqual(n.labels, (b"foo", b"bar", b""))
def testFromUnicode2(self):
n = dns.name.from_text("foo\u1234bar.bar")
self.assertEqual(n.labels, (b"xn--foobar-r5z", b"bar", b""))
def testFromUnicodeAlternateDot1(self):
n = dns.name.from_text("foo\u3002bar")
self.assertEqual(n.labels, (b"foo", b"bar", b""))
def testFromUnicodeAlternateDot2(self):
n = dns.name.from_text("foo\uff0ebar")
self.assertEqual(n.labels, (b"foo", b"bar", b""))
def testFromUnicodeAlternateDot3(self):
n = dns.name.from_text("foo\uff61bar")
self.assertEqual(n.labels, (b"foo", b"bar", b""))
def testFromUnicodeRoot(self):
n = dns.name.from_text(".")
self.assertEqual(n.labels, (b"",))
def testFromUnicodeAlternateRoot1(self):
n = dns.name.from_text("\u3002")
self.assertEqual(n.labels, (b"",))
def testFromUnicodeAlternateRoot2(self):
n = dns.name.from_text("\uff0e")
self.assertEqual(n.labels, (b"",))
def testFromUnicodeAlternateRoot3(self):
n = dns.name.from_text("\uff61")
self.assertEqual(n.labels, (b"",))
def testFromUnicodeIDNA2003Explicit(self):
t = "Königsgäßchen"
e = dns.name.from_unicode(t, idna_codec=dns.name.IDNA_2003)
self.assertEqual(str(e), "xn--knigsgsschen-lcb0w.")
def testFromUnicodeIDNA2003Default(self):
t = "Königsgäßchen"
e = dns.name.from_unicode(t)
self.assertEqual(str(e), "xn--knigsgsschen-lcb0w.")
@unittest.skipUnless(
dns.name.have_idna_2008, "Python idna cannot be imported; no IDNA2008"
)
def testFromUnicodeIDNA2008(self):
t = "Königsgäßchen"
def bad():
codec = dns.name.IDNA_2008_Strict
return dns.name.from_unicode(t, idna_codec=codec)
self.assertRaises(dns.name.IDNAException, bad)
e1 = dns.name.from_unicode(t, idna_codec=dns.name.IDNA_2008)
self.assertEqual(str(e1), "xn--knigsgchen-b4a3dun.")
c2 = dns.name.IDNA_2008_Transitional
e2 = dns.name.from_unicode(t, idna_codec=c2)
self.assertEqual(str(e2), "xn--knigsgsschen-lcb0w.")
@unittest.skipUnless(
dns.name.have_idna_2008, "Python idna cannot be imported; no IDNA2008"
)
def testFromUnicodeIDNA2008Mixed(self):
# the IDN rules for names are very restrictive, disallowing
# practical names like '_sip._tcp.Königsgäßchen'. Dnspython
# has a "practical" mode which permits labels which are purely
# ASCII to go straight through, and thus not invalid useful
# things in the real world.
t = "_sip._tcp.Königsgäßchen"
def bad1():
codec = dns.name.IDNA_2008_Strict
return dns.name.from_unicode(t, idna_codec=codec)
def bad2():
codec = dns.name.IDNA_2008_UTS_46
return dns.name.from_unicode(t, idna_codec=codec)
def bad3():
codec = dns.name.IDNA_2008_Transitional
return dns.name.from_unicode(t, idna_codec=codec)
self.assertRaises(dns.name.IDNAException, bad1)
self.assertRaises(dns.name.IDNAException, bad2)
self.assertRaises(dns.name.IDNAException, bad3)
e = dns.name.from_unicode(t, idna_codec=dns.name.IDNA_2008_Practical)
self.assertEqual(str(e), "_sip._tcp.xn--knigsgchen-b4a3dun.")
def testFromUnicodeEscapes(self):
n = dns.name.from_unicode(r"\097.\098.\099.")
t = n.to_unicode()
self.assertEqual(t, "a.b.c.")
def testToUnicode1(self):
n = dns.name.from_text("foo.bar")
s = n.to_unicode()
self.assertEqual(s, "foo.bar.")
def testToUnicode2(self):
n = dns.name.from_text("foo\u1234bar.bar")
s = n.to_unicode()
self.assertEqual(s, "foo\u1234bar.bar.")
def testToUnicode3(self):
n = dns.name.from_text("foo.bar")
s = n.to_unicode()
self.assertEqual(s, "foo.bar.")
@unittest.skipUnless(
dns.name.have_idna_2008, "Python idna cannot be imported; no IDNA2008"
)
def testToUnicode4(self):
n = dns.name.from_text("ドメイン.テスト", idna_codec=dns.name.IDNA_2008)
s = n.to_unicode()
self.assertEqual(str(n), "xn--eckwd4c7c.xn--zckzah.")
self.assertEqual(s, "ドメイン.テスト.")
@unittest.skipUnless(
dns.name.have_idna_2008, "Python idna cannot be imported; no IDNA2008"
)
def testToUnicode5(self):
# Exercise UTS 46 remapping in decode. This doesn't normally happen
# as you can see from us having to instantiate the codec as
# transitional with strict decoding, not one of our usual choices.
codec = dns.name.IDNA2008Codec(True, True, False, True)
n = dns.name.from_text("xn--gro-7ka.com")
self.assertEqual(n.to_unicode(idna_codec=codec), "gross.com.")
@unittest.skipUnless(
dns.name.have_idna_2008, "Python idna cannot be imported; no IDNA2008"
)
def testToUnicode6(self):
# Test strict 2008 decoding without UTS 46
n = dns.name.from_text("xn--gro-7ka.com")
self.assertEqual(
n.to_unicode(idna_codec=dns.name.IDNA_2008_Strict), "groß.com."
)
def testDefaultDecodeIsJustPunycode(self):
# groß.com. in IDNA2008 form, pre-encoded.
n = dns.name.from_text("xn--gro-7ka.com")
# output using default codec which just decodes the punycode and
# doesn't test for IDNA2003 or IDNA2008.
self.assertEqual(n.to_unicode(), "groß.com.")
def testStrictINDA2003Decode(self):
# groß.com. in IDNA2008 form, pre-encoded.
n = dns.name.from_text("xn--gro-7ka.com")
def bad():
# This throws in IDNA2003 because it doesn't "round trip".
n.to_unicode(idna_codec=dns.name.IDNA_2003_Strict)
self.assertRaises(dns.name.IDNAException, bad)
def testINDA2008Decode(self):
# groß.com. in IDNA2008 form, pre-encoded.
n = dns.name.from_text("xn--gro-7ka.com")
self.assertEqual(n.to_unicode(idna_codec=dns.name.IDNA_2008), "groß.com.")
def testToUnicodeOmitFinalDot(self):
# groß.com. in IDNA2008 form, pre-encoded.
n = dns.name.from_text("xn--gro-7ka.com")
self.assertEqual(n.to_unicode(True, dns.name.IDNA_2008), "groß.com")
def testIDNA2003Misc(self):
self.assertEqual(dns.name.IDNA_2003.encode(""), b"")
self.assertRaises(
dns.name.LabelTooLong, lambda: dns.name.IDNA_2003.encode("x" * 64)
)
@unittest.skipUnless(
dns.name.have_idna_2008, "Python idna cannot be imported; no IDNA2008"
)
def testIDNA2008Misc(self):
self.assertEqual(dns.name.IDNA_2008.encode(""), b"")
self.assertRaises(
dns.name.LabelTooLong, lambda: dns.name.IDNA_2008.encode("x" * 64)
)
self.assertRaises(
dns.name.LabelTooLong, lambda: dns.name.IDNA_2008.encode("groß" + "x" * 60)
)
def testReverseIPv4(self):
e = dns.name.from_text("1.0.0.127.in-addr.arpa.")
n = dns.reversename.from_address("127.0.0.1")
self.assertEqual(e, n)
def testReverseIPv6(self):
e = dns.name.from_text(
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa."
)
n = dns.reversename.from_address("::1")
self.assertEqual(e, n)
def testReverseIPv6MappedIpv4(self):
e = dns.name.from_text("1.0.0.127.in-addr.arpa.")
n = dns.reversename.from_address("::ffff:127.0.0.1")
self.assertEqual(e, n)
def testBadReverseIPv4(self):
def bad():
dns.reversename.from_address("127.0.foo.1")
self.assertRaises(dns.exception.SyntaxError, bad)
def testBadReverseIPv6(self):
def bad():
dns.reversename.from_address("::1::1")
self.assertRaises(dns.exception.SyntaxError, bad)
def testReverseIPv4AlternateOrigin(self):
e = dns.name.from_text("1.0.0.127.foo.bar.")
origin = dns.name.from_text("foo.bar")
n = dns.reversename.from_address("127.0.0.1", v4_origin=origin)
self.assertEqual(e, n)
def testReverseIPv6AlternateOrigin(self):
e = dns.name.from_text(
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.foo.bar."
)
origin = dns.name.from_text("foo.bar")
n = dns.reversename.from_address("::1", v6_origin=origin)
self.assertEqual(e, n)
def testForwardIPv4(self):
n = dns.name.from_text("1.0.0.127.in-addr.arpa.")
e = "127.0.0.1"
text = dns.reversename.to_address(n)
self.assertEqual(text, e)