/usr/lib/python3/dist-packages/nbxmpp/stringprepare.py is in python3-nbxmpp 0.5.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 | # -*- coding:utf-8 -*-
## src/common/xmpp/stringprepare.py
##
## Copyright (C) 2001-2005 Twisted Matrix Laboratories
## Copyright (C) 2005-2012 Yann Leboulanger <asterix AT lagaule.org>
## Copyright (C) 2006 Stefan Bethge <stefan AT lanpartei.de>
## Copyright (C) 2007 Jean-Marie Traissard <jim AT lapin.org>
##
## This file is part of Gajim.
##
## Gajim is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published
## by the Free Software Foundation; version 3 only.
##
## Gajim is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Gajim. If not, see <http://www.gnu.org/licenses/>.
##
import stringprep
import unicodedata
from encodings import idna
class ILookupTable:
"""
Interface for character lookup classes
"""
def lookup(self, c):
"""
Return whether character is in this table
"""
pass
class IMappingTable:
"""
Interface for character mapping classes
"""
def map(self, c):
"""
Return mapping for character
"""
pass
class LookupTableFromFunction:
__implements__ = ILookupTable
def __init__(self, in_table_function):
self.lookup = in_table_function
class LookupTable:
__implements__ = ILookupTable
def __init__(self, table):
self._table = table
def lookup(self, c):
return c in self._table
class MappingTableFromFunction:
__implements__ = IMappingTable
def __init__(self, map_table_function):
self.map = map_table_function
class EmptyMappingTable:
__implements__ = IMappingTable
def __init__(self, in_table_function):
self._in_table_function = in_table_function
def map(self, c):
if self._in_table_function(c):
return None
else:
return c
class Profile:
def __init__(self, mappings=[], normalize=True, prohibiteds=[],
check_unassigneds=True, check_bidi=True):
self.mappings = mappings
self.normalize = normalize
self.prohibiteds = prohibiteds
self.do_check_unassigneds = check_unassigneds
self.do_check_bidi = check_bidi
def prepare(self, string):
result = self.map(string)
if self.normalize:
result = unicodedata.normalize("NFKC", result)
self.check_prohibiteds(result)
if self.do_check_unassigneds:
self.check_unassigneds(result)
if self.do_check_bidi:
self.check_bidirectionals(result)
return result
def map(self, string):
result = []
for c in string:
result_c = c
for mapping in self.mappings:
result_c = mapping.map(c)
if result_c != c:
break
if result_c is not None:
result.append(result_c)
return "".join(result)
def check_prohibiteds(self, string):
for c in string:
for table in self.prohibiteds:
if table.lookup(c):
raise UnicodeError("Invalid character %s" % repr(c))
def check_unassigneds(self, string):
for c in string:
if stringprep.in_table_a1(c):
raise UnicodeError("Unassigned code point %s" % repr(c))
def check_bidirectionals(self, string):
found_LCat = False
found_RandALCat = False
for c in string:
if stringprep.in_table_d1(c):
found_RandALCat = True
if stringprep.in_table_d2(c):
found_LCat = True
if found_LCat and found_RandALCat:
raise UnicodeError("Violation of BIDI Requirement 2")
if found_RandALCat and not (stringprep.in_table_d1(string[0]) and
stringprep.in_table_d1(string[-1])):
raise UnicodeError("Violation of BIDI Requirement 3")
class NamePrep:
"""
Implements preparation of internationalized domain names
This class implements preparing internationalized domain names using the
rules defined in RFC 3491, section 4 (Conversion operations).
We do not perform step 4 since we deal with unicode representations of
domain names and do not convert from or to ASCII representations using
punycode encoding. When such a conversion is needed, the L{idna} standard
library provides the C{ToUnicode()} and C{ToASCII()} functions. Note that
L{idna} itself assumes UseSTD3ASCIIRules to be false.
The following steps are performed by C{prepare()}:
* Split the domain name in labels at the dots (RFC 3490, 3.1)
* Apply nameprep proper on each label (RFC 3491)
* Enforce the restrictions on ASCII characters in host names by
assuming STD3ASCIIRules to be true. (STD 3)
* Rejoin the labels using the label separator U+002E (full stop).
"""
# Prohibited characters.
prohibiteds = [chr(n) for n in list(range(0x00, 0x2c + 1)) +
list(range(0x2e, 0x2f + 1)) +
list(range(0x3a, 0x40 + 1)) +
list(range(0x5b, 0x60 + 1)) +
list(range(0x7b, 0x7f + 1)) ]
def prepare(self, string):
result = []
labels = idna.dots.split(string)
if labels and len(labels[-1]) == 0:
trailing_dot = '.'
del labels[-1]
else:
trailing_dot = ''
for label in labels:
result.append(self.nameprep(label))
return ".".join(result)+trailing_dot
def check_prohibiteds(self, string):
for c in string:
if c in self.prohibiteds:
raise UnicodeError("Invalid character %s" % repr(c))
def nameprep(self, label):
label = idna.nameprep(label)
self.check_prohibiteds(label)
if len(label) == 0:
raise UnicodeError("Invalid empty name")
if label[0] == '-':
raise UnicodeError("Invalid leading hyphen-minus")
if label[-1] == '-':
raise UnicodeError("Invalid trailing hyphen-minus")
return label
C_11 = LookupTableFromFunction(stringprep.in_table_c11)
C_12 = LookupTableFromFunction(stringprep.in_table_c12)
C_21 = LookupTableFromFunction(stringprep.in_table_c21)
C_22 = LookupTableFromFunction(stringprep.in_table_c22)
C_3 = LookupTableFromFunction(stringprep.in_table_c3)
C_4 = LookupTableFromFunction(stringprep.in_table_c4)
C_5 = LookupTableFromFunction(stringprep.in_table_c5)
C_6 = LookupTableFromFunction(stringprep.in_table_c6)
C_7 = LookupTableFromFunction(stringprep.in_table_c7)
C_8 = LookupTableFromFunction(stringprep.in_table_c8)
C_9 = LookupTableFromFunction(stringprep.in_table_c9)
B_1 = EmptyMappingTable(stringprep.in_table_b1)
B_2 = MappingTableFromFunction(stringprep.map_table_b2)
nodeprep = Profile(mappings=[B_1, B_2],
prohibiteds=[C_11, C_12, C_21, C_22,
C_3, C_4, C_5, C_6, C_7, C_8, C_9,
LookupTable(['"', '&', "'", '/',
':', '<', '>', '@'])])
resourceprep = Profile(mappings=[B_1,],
prohibiteds=[C_12, C_21, C_22,
C_3, C_4, C_5, C_6, C_7, C_8, C_9])
nameprep = NamePrep()
|