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annotate util/jid.lua @ 14103:27e97e5b2c16 13.0

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util.jid: Fix to reject IPv6 literal hosts without brackets From RFC 7622: > Implementation Note: Reuse of the IP-literal rule from [RFC6874] > implies that IPv6 addresses are enclosed within square brackets (i.e., > beginning with '[' and ending with ']'), , which was not the case with > the definition of the XMPP address format in [RFC3920] but which was > changed in [RFC6122].
author Kim Alvefur <zash@zash.se>
date Sat, 14 Mar 2026 01:16:14 +0100
parents 863dd118f8e8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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841d61be198f Remove version number from copyright headers
Matthew Wild <mwild1@gmail.com>
parents: 1171
diff changeset
1 -- Prosody IM
2923
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 2245
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2 -- Copyright (C) 2008-2010 Matthew Wild
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 2245
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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Florian Zeitz <florob@babelmonkeys.de>
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4 --
758
b1885732e979 GPL->MIT!
Matthew Wild <mwild1@gmail.com>
parents: 717
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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parents: 384
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7 --
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8
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9
0
3e3171b59028 First commit, where do you want to go tomorrow?
matthew
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10
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a7199fc8a50e util.jid: Import select() into local (fixes traceback, tests on Lua 5.2)
Kim Alvefur <zash@zash.se>
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11 local select = select;
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12 local match, sub = string.match, string.sub;
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13 local nodeprep = require "prosody.util.encodings".stringprep.nodeprep;
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14 local nameprep = require "prosody.util.encodings".stringprep.nameprep;
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15 local resourceprep = require "prosody.util.encodings".stringprep.resourceprep;
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16 local idna_to_ascii = require "prosody.util.encodings".idna.to_ascii;
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17 local net = require "prosody.util.net";
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18
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19 local escapes = {
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20 [" "] = "\\20"; ['"'] = "\\22";
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21 ["&"] = "\\26"; ["'"] = "\\27";
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22 ["/"] = "\\2f"; [":"] = "\\3a";
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23 ["<"] = "\\3c"; [">"] = "\\3e";
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24 ["@"] = "\\40"; ["\\"] = "\\5c";
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25 };
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26 local unescapes = {};
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27 local backslash_escapes = {};
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28 for k,v in pairs(escapes) do
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29 unescapes[v] = k;
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30 backslash_escapes[v] = v:gsub("\\", escapes)
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31 end
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32
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33 local _ENV = nil;
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34 -- luacheck: std none
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35
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36 local function split(jid)
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37 if jid == nil then return; end
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38 local node, nodepos = match(jid, "^([^@/]+)@()");
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39 local host, hostpos = match(jid, "^([^@/]+)()", nodepos);
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40 local resource = host and match(jid, "^/(.+)$", hostpos);
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41 if (host == nil) or ((resource == nil) and #jid >= hostpos) then return nil, nil, nil; end
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42 return node, host, resource;
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43 end
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44
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45 local function bare(jid)
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46 local node, host = split(jid);
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47 if node ~= nil and host ~= nil then
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48 return node.."@"..host;
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49 end
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50 return host;
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51 end
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52
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53 local function valid_ip(ip)
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54 local v6 = match(ip, "^%[([%x:.]+)%]$");
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55 local v4 = match(ip, "^%d%d?%d?%.%d%d?%d?%.%d%d?%d?%.%d%d?%d?$");
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56 return (v6 or v4) and net.pton(v6 or v4);
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57 end
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58
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59 local function prepped_split(jid, strict)
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60 local node, host, resource = split(jid);
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61 if host ~= nil and host ~= "." then
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62 if sub(host, -1, -1) == "." then -- Strip empty root label
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63 host = sub(host, 1, -2);
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64 end
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65 host = nameprep(host, strict);
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66 if host == nil then return; end
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67 if not (valid_ip(host) or idna_to_ascii(host)) then return; end
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68 if node ~= nil then
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69 node = nodeprep(node, strict);
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70 if node == nil then return; end
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71 end
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72 if resource ~= nil then
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73 resource = resourceprep(resource, strict);
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74 if resource == nil then return; end
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75 end
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76 return node, host, resource;
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77 end
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78 end
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79
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80 local function join(node, host, resource)
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81 if host == nil then return end
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82 if node ~= nil and resource ~= nil then
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83 return node.."@"..host.."/"..resource;
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84 elseif node ~= nil then
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85 return node.."@"..host;
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86 elseif resource ~= nil then
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87 return host.."/"..resource;
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88 end
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89 return host;
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90 end
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91
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92 local function prep(jid, strict)
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93 local node, host, resource = prepped_split(jid, strict);
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94 return join(node, host, resource);
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95 end
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96
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97 local function compare(jid, acl)
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98 -- compare jid to single acl rule
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99 -- TODO compare to table of rules?
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100 local jid_node, jid_host, jid_resource = split(jid);
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101 local acl_node, acl_host, acl_resource = split(acl);
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102 if (acl_node == nil or acl_node == jid_node) and
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103 (acl_host == nil or acl_host == jid_host) and
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104 (acl_resource == nil or acl_resource == jid_resource) then
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105 return true
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106 end
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107 return false
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108 end
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109
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110 local function node(jid)
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111 return (select(1, split(jid)));
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112 end
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113
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114 local function host(jid)
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115 return (select(2, split(jid)));
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116 end
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117
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118 local function resource(jid)
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119 return (select(3, split(jid)));
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120 end
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121
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122 -- TODO Forbid \20 at start and end of escaped output per XEP-0106 v1.1
11056
0b0a42542456 util.jid: Fix special escaping of '\' per XEP-0106
Kim Alvefur <zash@zash.se>
parents: 10358
diff changeset
123 local function escape(s) return s and (s:gsub("\\%x%x", backslash_escapes):gsub("[\"&'/:<>@ ]", escapes)); end
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
124 local function unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
4407
f78c6f5fa090 util.jid: Added escape() and unescape().
Waqas Hussain <waqas20@gmail.com>
parents: 3480
diff changeset
125
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
126 return {
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
127 split = split;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
128 bare = bare;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
129 prepped_split = prepped_split;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
130 join = join;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
131 prep = prep;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
132 compare = compare;
7296
1859e07ae082 util.jid+tests: Add simple helpers... node(), host() and resource() for extracting specific parts of a JID
Matthew Wild <mwild1@gmail.com>
parents: 6891
diff changeset
133 node = node;
1859e07ae082 util.jid+tests: Add simple helpers... node(), host() and resource() for extracting specific parts of a JID
Matthew Wild <mwild1@gmail.com>
parents: 6891
diff changeset
134 host = host;
1859e07ae082 util.jid+tests: Add simple helpers... node(), host() and resource() for extracting specific parts of a JID
Matthew Wild <mwild1@gmail.com>
parents: 6891
diff changeset
135 resource = resource;
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
136 escape = escape;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
137 unescape = unescape;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6340
diff changeset
138 };