Mercurial > prosody-modules

annotate mod_tcpproxy/mod_tcpproxy.lua @ 5383:df11a2cbc7b7

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mod_http_oauth2: Implement RFC 7628 Proof Key for Code Exchange Likely to become mandatory in OAuth 2.1. Backwards compatible since the default 'plain' verifier would compare nil with nil if the relevant parameters are left out.
author Kim Alvefur <zash@zash.se>
date Sat, 29 Apr 2023 13:09:46 +0200
parents 3804332c204e
children
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1 local st = require "util.stanza";
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3 local xmlns_ibb = "http://jabber.org/protocol/ibb";
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4 local xmlns_tcp = "http://prosody.im/protocol/tcpproxy";
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6 local host_attr, port_attr = xmlns_tcp.."\1host", xmlns_tcp.."\1port";
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8 local base64 = require "util.encodings".base64;
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9 local b64, unb64 = base64.encode, base64.decode;
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11 local host = module.host;
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13 local open_connections = {};
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15 local function new_session(jid, sid, conn)
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16 if not open_connections[jid] then
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17 open_connections[jid] = {};
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18 end
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19 open_connections[jid][sid] = conn;
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20 end
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21 local function close_session(jid, sid)
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22 if open_connections[jid] then
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23 open_connections[jid][sid] = nil;
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24 if next(open_connections[jid]) == nil then
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25 open_connections[jid] = nil;
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26 end
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27 return true;
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28 end
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29 end
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31 function proxy_component(origin, stanza)
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32 local ibb_tag = stanza.tags[1];
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33 if (not (stanza.name == "iq" and stanza.attr.type == "set")
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34 and stanza.name ~= "message")
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35 or
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36 (not (ibb_tag)
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37 or ibb_tag.attr.xmlns ~= xmlns_ibb) then
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38 if stanza.attr.type ~= "error" then
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39 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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40 end
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41 return;
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42 end
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43
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44 if ibb_tag.name == "open" then
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45 -- Starting a new stream
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46 local to_host, to_port = ibb_tag.attr[host_attr], ibb_tag.attr[port_attr];
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47 local jid, sid, block_size = stanza.attr.from, ibb_tag.attr.sid, ibb_tag.attr["block-size"];
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48 if not (to_host and to_port) then
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49 origin.send(st.error_reply(stanza, "modify", "bad-request", "No host/port specified"));
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50 return true;
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51 elseif not sid or sid == "" then
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52 origin.send(st.error_reply(stanza, "modify", "bad-request", "No sid specified"));
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53 return true;
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54 elseif not block_size or not tonumber(block_size) then
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55 origin.send(st.error_reply(stanza, "modify", "bad-request", "Bad block-size attribute"));
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56 return true;
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57 elseif ibb_tag.attr.stanza ~= "message" then
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58 origin.send(st.error_reply(stanza, "modify", "bad-request", "Only 'message' stanza transport is supported"));
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59 return true;
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60 end
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61 local conn, err = socket.tcp();
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62 if not conn then
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63 origin.send(st.error_reply(stanza, "wait", "resource-constraint", err));
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64 return true;
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65 end
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66 conn:settimeout(0);
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67
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68 local success, err = conn:connect(to_host, to_port);
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69 if not success and err ~= "timeout" then
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70 origin.send(st.error_reply(stanza, "wait", "remote-server-not-found", err));
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71 return true;
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72 end
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73
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74 local listener,seq = {}, 0;
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75 function listener.onconnect(conn)
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76 origin.send(st.reply(stanza));
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77 end
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78 function listener.onincoming(conn, data)
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79 origin.send(st.message({to=jid,from=host})
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80 :tag("data", {xmlns=xmlns_ibb,seq=seq,sid=sid})
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81 :text(b64(data)));
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82 seq = seq + 1;
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83 end
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84 function listener.ondisconnect(conn, err)
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85 origin.send(st.message({to=jid,from=host})
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86 :tag("close", {xmlns=xmlns_ibb,sid=sid}));
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87 close_session(jid, sid);
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88 end
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89
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90 conn = server.wrapclient(conn, to_host, to_port, listener, "*a" );
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91 new_session(jid, sid, conn);
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92 elseif ibb_tag.name == "data" then
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93 local conn = open_connections[stanza.attr.from][ibb_tag.attr.sid];
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94 if conn then
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95 local data = unb64(ibb_tag:get_text());
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96 if data then
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97 conn:write(data);
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98 else
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99 origin.send(
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100 st.error_reply(stanza, "modify", "bad-request", "Invalid data (base64?)")
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101 );
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102 return true;
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103 end
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104 else
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105 origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
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106 return true;
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107 end
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108 elseif ibb_tag.name == "close" then
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109 if close_session(stanza.attr.from, ibb_tag.attr.sid) then
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110 origin.send(st.reply(stanza));
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111 else
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112 origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
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113 return true;
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114 end
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115 end
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116 end
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117
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118 local function stanza_handler(event)
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119 proxy_component(event.origin, event.stanza);
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120 return true;
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121 end
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122 module:hook("iq/bare", stanza_handler, -1);
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123 module:hook("message/bare", stanza_handler, -1);
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124 module:hook("presence/bare", stanza_handler, -1);
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125 module:hook("iq/full", stanza_handler, -1);
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126 module:hook("message/full", stanza_handler, -1);
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127 module:hook("presence/full", stanza_handler, -1);
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128 module:hook("iq/host", stanza_handler, -1);
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129 module:hook("message/host", stanza_handler, -1);
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130 module:hook("presence/host", stanza_handler, -1);
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131
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132 require "core.componentmanager".register_component(host, function() end); -- COMPAT Prosody 0.7