Annotate

mod_http_connect/mod_http_connect.lua @ 6333:dbbbd5caf292

mod_cloud_notify_encrypted: Fix variable name (thanks bronko)
author Matthew Wild <mwild1@gmail.com>
date Thu, 10 Jul 2025 10:15:35 +0100
parent 6314:706867e05809
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- This feature was added after Prosody 13.0
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2 --% requires: net-connect-filter
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3
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4 local hashes = require "prosody.util.hashes";
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5 local server = require "prosody.net.server";
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6 local connect = require"prosody.net.connect".connect;
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7 local basic = require "prosody.net.resolvers.basic";
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8 local new_ip = require "prosody.util.ip".new_ip;
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10 local b64_decode = require "prosody.util.encodings".base64.decode;
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11
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12 local proxy_secret = module:get_option_string("http_proxy_secret", require "prosody.util.id".long());
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13
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14 local allow_private_ips = module:get_option_boolean("http_proxy_to_private_ips", false);
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15 local allow_all_ports = module:get_option_boolean("http_proxy_to_all_ports", false);
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16
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17 local allowed_target_ports = module:get_option_set("http_proxy_to_ports", { "443", "5281", "5443", "7443" }) / tonumber;
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18
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19 local sessions = {};
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20
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21 local listeners = {};
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22
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23 function listeners.onconnect(conn)
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24 local event = sessions[conn];
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25 local response = event.response;
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26 response.status_code = 200;
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27 response:send("");
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28 response.conn:onwritable();
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29 response.conn:setlistener(listeners, event);
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30 server.link(conn, response.conn);
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31 server.link(response.conn, conn);
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32 response.conn = nil;
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33 end
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34
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35 function listeners.onattach(conn, event)
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36 sessions[conn] = event;
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37 end
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38
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39 function listeners.onfail(event, err)
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40 local response = event.response;
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41 if assert(response) then
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42 response.status_code = 500;
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43 response:send(err);
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44 end
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45 end
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46
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47 function listeners.ondisconnect(conn, err) --luacheck: ignore 212/conn 212/err
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48 end
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49
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50 local function is_permitted_target(conn_type, ip, port)
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51 if not (allow_all_ports or allowed_target_ports:contains(tonumber(port))) then
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52 module:log("warn", "Forbidding tunnel to %s:%d (forbidden port)", ip, port);
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53 return false;
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54 end
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55 if not allow_private_ips then
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56 local family = (conn_type:byte(-1, -1) == 54) and "IPv6" or "IPv4";
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57 local parsed_ip = new_ip(ip, family);
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58 if parsed_ip.private then
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59 module:log("warn", "Forbidding tunnel to %s:%d (forbidden ip)", ip, port);
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60 return false;
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61 end
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62 end
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63 return true;
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64 end
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65
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66 local function verify_auth(user, password)
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67 local expiry = tonumber(user, 10);
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68 if os.time() > expiry then
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69 module:log("warn", "Attempt to use expired credentials");
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70 return nil;
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71 end
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72 local expected_password = hashes.hmac_sha1(proxy_secret, user);
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73 if hashes.equals(b64_decode(password), expected_password) then
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74 return true;
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75 end
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76 module:log("warn", "Credential mismatch for %s: expected '%q' got '%q'", user, expected_password, password);
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77 end
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78
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79 module:depends("http");
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80 module:provides("http", {
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81 default_path = "/";
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82 route = {
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83 ["CONNECT /*"] = function(event)
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84 local request, response = event.request, event.response;
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85 local host, port = request.url.scheme, request.url.path;
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86 if port == "" then return 400 end
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87
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88 -- Auth check
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89 local realm = host;
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90 local headers = request.headers;
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91 if not headers.proxy_authorization then
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92 response.headers.proxy_authenticate = ("Basic realm=%q"):format(realm);
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93 return 407
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94 end
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95 local user, password = b64_decode(headers.proxy_authorization:match"[^ ]*$"):match"([^:]*):(.*)";
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96 if not verify_auth(user, password) then
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97 response.headers.proxy_authenticate = ("Basic realm=%q"):format(realm);
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98 return 407
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99 end
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100
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101 local resolve = basic.new(host, port, "tcp", {
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102 filter = is_permitted_target;
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103 });
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104 connect(resolve, listeners, nil, event)
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105 return true;
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106 end;
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107 }
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108 });
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109
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110 local http_url = module:http_url();
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111 local parsed_url = require "socket.url".parse(http_url);
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112
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113 local proxy_host = parsed_url.host;
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114 local proxy_port = tonumber(parsed_url.port);
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115
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116 if not proxy_port then
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117 if parsed_url.scheme == "https" then
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118 proxy_port = 443;
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119 elseif parsed_url.scheme == "http" then
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120 proxy_port = 80;
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121 end
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122 end
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123
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124 module:depends "external_services";
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125
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126 module:add_item("external_service", {
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127 type = "http";
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128 transport = "tcp";
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129 host = proxy_host;
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130 port = proxy_port;
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131
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132 secret = proxy_secret;
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133 algorithm = "turn";
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134 ttl = 3600;
706867e05809 mod_http_connect: Add authentication, target filtering and advertisement via XEP-0215
Matthew Wild <mwild1@gmail.com>
parents: 6313
diff changeset
135 });