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annotate mod_password_reset/mod_password_reset.lua @ 3344:0ce475235ae1

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mod_password_reset: New module for self-service password resets via a web page
author Matthew Wild <mwild1@gmail.com>
date Tue, 02 Oct 2018 16:09:17 +0100
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children f7668aee968a
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3344
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1 local adhoc_new = module:require "adhoc".new;
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2 local adhoc_simple_form = require "util.adhoc".new_simple_form;
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3 local new_token = require "util.id".long;
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4 local jid_prepped_split = require "util.jid".prepped_split;
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5 local http_formdecode = require "net.http".formdecode;
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6 local usermanager = require "core.usermanager";
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7 local dataforms_new = require "util.dataforms".new;
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8 local tohtml = require "util.stanza".xml_escape
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9 local tostring = tostring;
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10
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11 local reset_tokens = module:open_store();
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12
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13 local max_token_age = module:get_option_number("password_reset_validity", 86400);
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14
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15 local serve = module:depends"http_files".serve;
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16
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17 module:depends"adhoc";
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18 module:depends"http";
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19
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20 local function apply_template(template, args)
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21 return
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22 template:gsub("{{([^}]*)}}", function (k)
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23 if args[k] then
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24 return tohtml(args[k])
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25 else
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26 return k
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27 end
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28 end)
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29 end
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30
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31 function generate_page(event)
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32 local request, response = event.request, event.response;
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33
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34 local token = request.url.query;
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35 local reset_info = token and reset_tokens:get(token);
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36
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37 response.headers.content_type = "text/html; charset=utf-8";
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38
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39 if not reset_info or os.difftime(os.time(), reset_info.generated_at) > max_token_age then
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40 module:log("warn", "Expired token: %s", token or "<none>");
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41 local template = assert(module:load_resource("password_reset/password_result.html")):read("*a");
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42
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43 return apply_template(template, { classes = "alert-danger", message = "This link has expired." })
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44 end
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45
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46 local template = assert(module:load_resource("password_reset/password_reset.html")):read("*a");
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47
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48 return apply_template(template, { jid = reset_info.user.."@"..module.host, token = token });
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49 end
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50
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51 function handle_form(event)
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52 local request, response = event.request, event.response;
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53 local form_data = http_formdecode(request.body);
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54 local password, token = form_data["password"], form_data["token"];
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55
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56 local reset_info = reset_tokens:get(token);
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57
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58 local template = assert(module:load_resource("password_reset/password_result.html")):read("*a");
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59
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60 response.headers.content_type = "text/html; charset=utf-8";
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61
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62 if not reset_info or os.difftime(os.time(), reset_info.generated_at) > max_token_age then
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63 return apply_template(template, { classes = "alert-danger", message = "This link has expired." })
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64 end
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65
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66 local ok, err = usermanager.set_password(reset_info.user, password, module.host);
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67
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68 if ok then
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69 reset_tokens:set(token, nil);
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70
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71 return apply_template(template, { classes = "alert-success",
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72 message = "Your password has been updated! Happy chatting :)" })
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73 else
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74 module:log("debug", "Resetting password failed: " .. tostring(err));
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75
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76 return apply_template(template, { classes = "alert-danger", message = "An unknown error has occurred." })
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77 end
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78 end
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79
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80 module:provides("http", {
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81 route = {
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82 ["GET /bootstrap.min.css"] = serve(module:get_directory() .. "/password_reset/bootstrap.min.css");
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83 ["GET /reset"] = generate_page;
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84 ["POST /reset"] = handle_form;
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85 };
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86 });
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87
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88 -- Changing a user's password
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89 local reset_password_layout = dataforms_new{
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90 title = "Generate password reset link";
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91 instructions = "Please enter the details of the user who needs a reset link.";
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92
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93 { name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/adhoc/mod_password_reset" };
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94 { name = "accountjid", type = "jid-single", required = true, label = "JID" };
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95 };
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96
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97 local reset_command_handler = adhoc_simple_form(reset_password_layout, function (data, errors)
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98 if errors then
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99 local errmsg = {};
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100 for name, text in pairs(errors) do
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101 errmsg[#errmsg + 1] = name .. ": " .. text;
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102 end
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103 return { status = "completed", error = { message = table.concat(errmsg, "\n") } };
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104 end
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105
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106 local jid = data.accountjid;
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107 local user, host = jid_prepped_split(jid);
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108
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109 if host ~= module.host then
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110 return {
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111 status = "completed";
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112 error = { message = "You may only generate password reset links for users on "..module.host.."." };
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113 };
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114 end
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115
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116 local token = new_token();
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117 reset_tokens:set(token, {
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118 generated_at = os.time();
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119 user = user;
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120 });
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121
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122 return { info = module:http_url() .. "/reset?" .. token, status = "completed" };
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123 end);
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124
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125 local adhoc_reset = adhoc_new(
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126 "Generate password reset link",
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127 "password_reset",
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128 reset_command_handler,
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129 "admin"
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130 );
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131
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parents:
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132 module:add_item("adhoc", adhoc_reset);