prosody-modules
3c18d8deeb38
mod_invites/mod_invites.lua

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mod_invites/mod_invites.lua @ 4081:3c18d8deeb38

mod_invites: Fix potential traceback when invalid token used (from Snikket)
author Matthew Wild <mwild1@gmail.com>
date Mon, 07 Sep 2020 13:04:01 +0100
parent 4080:14a3f5223074
child 4096:24f4eb35ab60
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1 local id = require "util.id";
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2 local url = require "socket.url";
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3 local jid_node = require "util.jid".node;
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4
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5 local invite_ttl = module:get_option_number("invite_expiry", 86400 * 7);
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6
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7 local token_storage = module:open_store("invite_token", "map");
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8
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9 local function get_uri(action, jid, token, params) --> string
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10 return url.build({
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11 scheme = "xmpp",
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12 path = jid,
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13 query = action..";preauth="..token..(params and (";"..params) or ""),
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14 });
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15 end
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16
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17 local function create_invite(invite_action, invite_jid, allow_registration, additional_data)
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18 local token = id.medium();
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19
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20 local created_at = os.time();
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21 local expires = created_at + invite_ttl;
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22
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23 local invite_params = (invite_action == "roster" and allow_registration) and "ibr=y" or nil;
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24
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25 local invite = {
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26 type = invite_action;
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27 jid = invite_jid;
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28
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29 token = token;
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30 allow_registration = allow_registration;
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31 additional_data = additional_data;
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32
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33 uri = get_uri(invite_action, invite_jid, token, invite_params);
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34
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35 created_at = created_at;
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36 expires = expires;
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37 };
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38
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39 module:fire_event("invite-created", invite);
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40
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41 if allow_registration then
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42 local ok, err = token_storage:set(nil, token, invite);
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43 if not ok then
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44 module:log("warn", "Failed to store account invite: %s", err);
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45 return nil, "internal-server-error";
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46 end
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47 end
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48
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49 if invite_action == "roster" then
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50 local username = jid_node(invite_jid);
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51 local ok, err = token_storage:set(username, token, expires);
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52 if not ok then
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53 module:log("warn", "Failed to store subscription invite: %s", err);
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54 return nil, "internal-server-error";
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55 end
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56 end
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57
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58 return invite;
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59 end
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60
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61 -- Create invitation to register an account (optionally restricted to the specified username)
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62 function create_account(account_username, additional_data) --luacheck: ignore 131/create_account
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63 local jid = account_username and (account_username.."@"..module.host) or module.host;
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64 return create_invite("register", jid, true, additional_data);
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65 end
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66
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67 -- Create invitation to reset the password for an account
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68 function create_account_reset(account_username) --luacheck: ignore 131/create_account_reset
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69 return create_account(account_username, { allow_reset = account_username });
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70 end
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71
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72 -- Create invitation to become a contact of a local user
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73 function create_contact(username, allow_registration, additional_data) --luacheck: ignore 131/create_contact
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74 return create_invite("roster", username.."@"..module.host, allow_registration, additional_data);
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75 end
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76
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77
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78 local valid_invite_methods = {};
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79 local valid_invite_mt = { __index = valid_invite_methods };
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80
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81 function valid_invite_methods:use()
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82 if self.username then
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83 -- Also remove the contact invite if present, on the
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84 -- assumption that they now have a mutual subscription
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85 token_storage:set(self.username, self.token, nil);
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86 end
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87 token_storage:set(nil, self.token, nil);
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88 return true;
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89 end
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90
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91 -- Get a validated invite (or nil, err). Must call :use() on the
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92 -- returned invite after it is actually successfully used
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93 -- For "roster" invites, the username of the local user (who issued
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94 -- the invite) must be passed.
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95 -- If no username is passed, but the registration is a roster invite
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96 -- from a local user, the "inviter" field of the returned invite will
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97 -- be set to their username.
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98 function get(token, username)
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99 if not token then
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100 return nil, "no-token";
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101 end
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102
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103 local valid_until, inviter;
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104
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105 -- Fetch from host store (account invite)
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106 local token_info = token_storage:get(nil, token);
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107
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108 if username then -- token being used for subscription
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109 -- Fetch from user store (subscription invite)
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110 valid_until = token_storage:get(username, token);
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111 else -- token being used for account creation
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112 valid_until = token_info and token_info.expires;
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113 if token_info and token_info.type == "roster" then
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114 username = jid_node(token_info.jid);
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115 inviter = username;
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116 end
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117 end
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118
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119 if not valid_until then
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120 module:log("debug", "Got unknown token: %s", token);
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121 return nil, "token-invalid";
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122 elseif os.time() > valid_until then
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123 module:log("debug", "Got expired token: %s", token);
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124 return nil, "token-expired";
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125 end
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126
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127 return setmetatable({
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128 token = token;
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129 username = username;
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130 inviter = inviter;
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131 type = token_info and token_info.type or "roster";
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132 uri = token_info and token_info.uri or get_uri("roster", username.."@"..module.host, token);
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133 additional_data = token_info and token_info.additional_data or nil;
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134 }, valid_invite_mt);
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135 end
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Matthew Wild <mwild1@gmail.com>
parents:
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136
80830d97da81 mod_invites: New module providing an API to create/manage invite tokens
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
137 function use(token) --luacheck: ignore 131/use
80830d97da81 mod_invites: New module providing an API to create/manage invite tokens
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
138 local invite = get(token);
80830d97da81 mod_invites: New module providing an API to create/manage invite tokens
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
139 return invite and invite:use();
80830d97da81 mod_invites: New module providing an API to create/manage invite tokens
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
140 end