prosody
1d13f73af58e
util/jid.lua

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util/jid.lua @ 5901:1d13f73af58e

certmanager: Default to using the server's cipher preference order by default, as clients have been shown to commonly select weak and insecure ciphers even when they support stronger ones
author Matthew Wild <mwild1@gmail.com>
date Sat, 09 Nov 2013 17:50:19 +0000
parent 4407:f78c6f5fa090
child 5776:bd0ff8ae98a8
child 5944:f3817912e8b2
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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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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7 --
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8
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9
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11 local match = string.match;
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12 local nodeprep = require "util.encodings".stringprep.nodeprep;
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13 local nameprep = require "util.encodings".stringprep.nameprep;
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14 local resourceprep = require "util.encodings".stringprep.resourceprep;
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16 local escapes = {
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17 [" "] = "\\20"; ['"'] = "\\22";
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18 ["&"] = "\\26"; ["'"] = "\\27";
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19 ["/"] = "\\2f"; [":"] = "\\3a";
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20 ["<"] = "\\3c"; [">"] = "\\3e";
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21 ["@"] = "\\40"; ["\\"] = "\\5c";
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22 };
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23 local unescapes = {};
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24 for k,v in pairs(escapes) do unescapes[v] = k; end
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26 module "jid"
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27
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28 local function _split(jid)
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29 if not jid then return; end
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30 local node, nodepos = match(jid, "^([^@/]+)@()");
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31 local host, hostpos = match(jid, "^([^@/]+)()", nodepos)
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32 if node and not host then return nil, nil, nil; end
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33 local resource = match(jid, "^/(.+)$", hostpos);
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34 if (not host) or ((not resource) and #jid >= hostpos) then return nil, nil, nil; end
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35 return node, host, resource;
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36 end
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37 split = _split;
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38
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39 function bare(jid)
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40 local node, host = _split(jid);
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41 if node and host then
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42 return node.."@"..host;
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43 end
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44 return host;
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45 end
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46
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47 local function _prepped_split(jid)
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48 local node, host, resource = _split(jid);
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49 if host then
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50 host = nameprep(host);
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51 if not host then return; end
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52 if node then
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53 node = nodeprep(node);
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54 if not node then return; end
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55 end
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56 if resource then
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57 resource = resourceprep(resource);
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58 if not resource then return; end
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59 end
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60 return node, host, resource;
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61 end
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62 end
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63 prepped_split = _prepped_split;
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64
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65 function prep(jid)
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66 local node, host, resource = _prepped_split(jid);
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67 if host then
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68 if node then
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69 host = node .. "@" .. host;
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70 end
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71 if resource then
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72 host = host .. "/" .. resource;
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73 end
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74 end
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75 return host;
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76 end
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77
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78 function join(node, host, resource)
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79 if node and host and resource then
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80 return node.."@"..host.."/"..resource;
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81 elseif node and host then
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82 return node.."@"..host;
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83 elseif host and resource then
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84 return host.."/"..resource;
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85 elseif host then
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86 return host;
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87 end
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88 return nil; -- Invalid JID
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89 end
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90
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91 function compare(jid, acl)
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92 -- compare jid to single acl rule
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93 -- TODO compare to table of rules?
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94 local jid_node, jid_host, jid_resource = _split(jid);
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95 local acl_node, acl_host, acl_resource = _split(acl);
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96 if ((acl_node ~= nil and acl_node == jid_node) or acl_node == nil) and
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97 ((acl_host ~= nil and acl_host == jid_host) or acl_host == nil) and
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98 ((acl_resource ~= nil and acl_resource == jid_resource) or acl_resource == nil) then
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99 return true
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100 end
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101 return false
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102 end
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103
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104 function escape(s) return s and (s:gsub(".", escapes)); end
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105 function unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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106
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107 return _M;