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annotate mod_compat_roles/mod_compat_roles.lua @ 5011:55cf7f063af6

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mod_muc_bot/README: Update to account for 0.12 going stable
author Kim Alvefur <zash@zash.se>
date Wed, 24 Aug 2022 11:37:00 +0200
parents 7c77058a1ac5
children d414fa8b37dc
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1 -- Export a module:may() that works on Prosody 0.12 and earlier
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2 -- (i.e. backed by is_admin).
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3
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4 -- This API is safe because Prosody 0.12 and earlier do not support
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5 -- per-session roles - all authorization is based on JID alone. It is not
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6 -- safe on versions that support per-session authorization.
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7
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8 module:set_global();
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9
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10 local moduleapi = require "core.moduleapi";
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11
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12 -- If module.may already exists, abort
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13 if moduleapi.may then return; end
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14
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15 local jid_split = require "util.jid".split;
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16 local um_is_admin = require "core.usermanager".is_admin;
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17
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18 local function get_jid_role_name(jid, host)
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19 if um_is_admin(jid, "*") then
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20 return "prosody:operator";
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21 elseif um_is_admin(jid, host) then
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22 return "prosody:admin";
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23 end
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24 return nil;
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25 end
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26
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27 local function get_user_role_name(username, host)
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28 return get_jid_role_name(username.."@"..host, host);
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29 end
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30
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31 -- permissions[host][permission_name] = permitted_role_name
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32 local permissions = {};
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33
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34 local function role_may(role_name, permission)
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35 local role_permissions = permissions[role_name];
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36 if not role_permissions then
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37 return false;
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38 end
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39 return not not permissions[role_name][permission];
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40 end
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41
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42 function moduleapi.may(self, action, context)
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43 if action:byte(1) == 58 then -- action begins with ':'
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44 action = self.name..action; -- prepend module name
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45 end
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46 if type(context) == "string" then -- check JID permissions
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47 local role;
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48 local node, host = jid_split(context);
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49 if host == self.host then
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50 role = get_user_role_name(node, self.host);
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51 else
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52 role = get_jid_role_name(context, self.host);
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53 end
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54 if not role then
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55 self:log("debug", "Access denied: JID <%s> may not %s (no role found)", context, action);
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56 return false;
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57 end
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58
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59 local permit = role_may(role, action);
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60 if not permit then
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61 self:log("debug", "Access denied: JID <%s> may not %s (not permitted by role %s)", context, action, role.name);
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62 end
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63 return permit;
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64 end
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65
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66 local session = context.origin or context.session;
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67 if type(session) ~= "table" then
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68 error("Unable to identify actor session from context");
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69 end
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70 if session.type == "s2sin" or (session.type == "c2s" and session.host ~= self.host) then
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71 local actor_jid = context.stanza.attr.from;
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72 local role_name = get_jid_role_name(actor_jid);
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73 if not role_name then
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74 self:log("debug", "Access denied: JID <%s> may not %s (no role found)", actor_jid, action);
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75 return false;
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76 end
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77 local permit = role_may(role_name, action, context);
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78 if not permit then
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79 self:log("debug", "Access denied: JID <%s> may not %s (not permitted by role %s)", actor_jid, action, role_name);
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80 end
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81 return permit;
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82 end
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83 end
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84
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85 function moduleapi.default_permission(self, role_name, permission)
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86 local r = permissions[self.host][role_name];
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87 if not r then
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88 r = {};
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89 permissions[self.host][role_name] = r;
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90 end
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91 r[permission] = true;
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92 end
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93
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94 function moduleapi.default_permissions(self, role_name, permission_list)
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95 for _, permission in ipairs(permission_list) do
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96 self:default_permission(role_name, permission);
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97 end
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98 end
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99
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100 function module.add_host(host_module)
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101 permissions[host_module.host] = {};
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102 function host_module.unload()
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103 permissions[host_module.host] = nil;
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104 end
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105 end