prosody
07424992d7fc
plugins/mod_authz_internal.lua

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plugins/mod_authz_internal.lua @ 12662:07424992d7fc

mod_authz_internal, and more: New iteration of role API These changes to the API (hopefully the last) introduce a cleaner separation between the user's primary (default) role, and their secondary (optional) roles. To keep the code sane and reduce complexity, a data migration is needed for people using stored roles in 0.12. This can be performed with prosodyctl mod_authz_internal migrate <host>
author Matthew Wild <mwild1@gmail.com>
date Wed, 17 Aug 2022 16:38:53 +0100
parent 12648:f299e570a0fe
child 12663:cf88f6b03942
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rev   line source
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1 local array = require "util.array";
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2 local it = require "util.iterators";
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3 local set = require "util.set";
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4 local jid_split, jid_bare = require "util.jid".split, require "util.jid".bare;
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5 local normalize = require "util.jid".prep;
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6 local roles = require "util.roles";
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7
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8 local config_global_admin_jids = module:context("*"):get_option_set("admins", {}) / normalize;
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9 local config_admin_jids = module:get_option_inherited_set("admins", {}) / normalize;
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10 local host = module.host;
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11
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12 local role_store = module:open_store("account_roles");
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13 local role_map_store = module:open_store("account_roles", "map");
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14
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15 local role_registry = {};
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16
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17 function register_role(role)
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18 if role_registry[role.name] ~= nil then
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19 return error("A role '"..role.name.."' is already registered");
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20 end
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21 if not roles.is_role(role) then
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22 -- Convert table syntax to real role object
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23 for i, inherited_role in ipairs(role.inherits or {}) do
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24 if type(inherited_role) == "string" then
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25 role.inherits[i] = assert(role_registry[inherited_role], "The named role '"..inherited_role.."' is not registered");
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26 end
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27 end
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28 if not role.permissions then role.permissions = {}; end
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29 for _, allow_permission in ipairs(role.allow or {}) do
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30 role.permissions[allow_permission] = true;
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31 end
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32 for _, deny_permission in ipairs(role.deny or {}) do
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33 role.permissions[deny_permission] = false;
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34 end
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35 role = roles.new(role);
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36 end
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37 role_registry[role.name] = role;
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38 end
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39
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40 -- Default roles
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41 register_role {
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42 name = "prosody:restricted";
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43 priority = 15;
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44 };
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45
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46 register_role {
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47 name = "prosody:user";
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48 priority = 25;
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49 inherits = { "prosody:restricted" };
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50 };
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51
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52 register_role {
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53 name = "prosody:admin";
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54 priority = 50;
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55 inherits = { "prosody:user" };
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56 };
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57
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58 register_role {
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59 name = "prosody:operator";
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60 priority = 75;
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61 inherits = { "prosody:admin" };
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62 };
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63
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64
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65 -- Process custom roles from config
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66
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67 local custom_roles = module:get_option("custom_roles", {});
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68 for n, role_config in ipairs(custom_roles) do
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69 local ok, err = pcall(register_role, role_config);
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70 if not ok then
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71 module:log("error", "Error registering custom role %s: %s", role_config.name or tostring(n), err);
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72 end
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73 end
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74
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75 -- Process custom permissions from config
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76
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77 local config_add_perms = module:get_option("add_permissions", {});
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78 local config_remove_perms = module:get_option("remove_permissions", {});
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79
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80 for role_name, added_permissions in pairs(config_add_perms) do
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81 if not role_registry[role_name] then
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82 module:log("error", "Cannot add permissions to unknown role '%s'", role_name);
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83 else
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84 for _, permission in ipairs(added_permissions) do
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85 role_registry[role_name]:set_permission(permission, true, true);
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86 end
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87 end
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88 end
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89
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90 for role_name, removed_permissions in pairs(config_remove_perms) do
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91 if not role_registry[role_name] then
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92 module:log("error", "Cannot remove permissions from unknown role '%s'", role_name);
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93 else
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94 for _, permission in ipairs(removed_permissions) do
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95 role_registry[role_name]:set_permission(permission, false, true);
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96 end
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97 end
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98 end
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99
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100 -- Public API
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101
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102 -- Get the primary role of a user
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103 function get_user_role(user)
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104 local bare_jid = user.."@"..host;
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105
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106 -- Check config first
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107 if config_global_admin_jids:contains(bare_jid) then
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108 return role_registry["prosody:operator"];
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109 elseif config_admin_jids:contains(bare_jid) then
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110 return role_registry["prosody:admin"];
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111 end
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112
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113 -- Check storage
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114 local stored_roles, err = role_store:get(user);
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115 if not stored_roles then
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116 if err then
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117 -- Unable to fetch role, fail
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118 return nil, err;
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119 end
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120 -- No role set, use default role
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121 return role_registry["prosody:user"];
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122 end
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123 if stored_roles._default == nil then
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124 -- No primary role explicitly set, return default
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125 return role_registry["prosody:user"];
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126 end
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127 local primary_stored_role = role_registry[stored_roles._default];
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128 if not primary_stored_role then
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129 return nil, "unknown-role";
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130 end
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131 return primary_stored_role;
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132 end
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133
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134 -- Set the primary role of a user
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135 function set_user_role(user, role_name)
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136 local role = role_registry[role_name];
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137 if not role then
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138 return error("Cannot assign default user an unknown role: "..tostring(role_name));
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139 end
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140 local keys_update = {
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141 _default = role_name;
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142 -- Primary role cannot be secondary role
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143 [role_name] = role_map_store.remove;
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144 };
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145 if role_name == "prosody:user" then
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146 -- Don't store default
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147 keys_update._default = role_map_store.remove;
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148 end
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149 local ok, err = role_map_store:set_keys(user, keys_update);
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150 if not ok then
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151 return nil, err;
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152 end
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153 return role;
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154 end
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155
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156 function add_user_secondary_role(user, role_name)
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157 if not role_registry[role_name] then
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158 return error("Cannot assign default user an unknown role: "..tostring(role_name));
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159 end
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160 role_map_store:set(user, role_name, true);
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161 end
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162
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163 function remove_user_secondary_role(user, role_name)
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164 role_map_store:set(user, role_name, nil);
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165 end
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166
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167 function get_user_secondary_roles(user)
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168 local stored_roles, err = role_store:get(user);
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169 if not stored_roles then
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170 if err then
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171 -- Unable to fetch role, fail
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172 return nil, err;
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173 end
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174 -- No role set
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175 return {};
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176 end
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177 stored_roles._default = nil;
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178 for role_name in pairs(stored_roles) do
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179 stored_roles[role_name] = role_registry[role_name];
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180 end
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181 return stored_roles;
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182 end
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183
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184 -- This function is *expensive*
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185 function get_users_with_role(role_name)
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186 local function role_filter(username, default_role) --luacheck: ignore 212/username
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187 return default_role == role_name;
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188 end
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189 local primary_role_users = set.new(it.to_array(it.filter(role_filter, pairs(role_map_store:get_all("_default") or {}))));
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190 local secondary_role_users = set.new(it.to_array(it.keys(role_map_store:get_all(role_name) or {})));
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191
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192 local config_set;
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193 if role_name == "prosody:admin" then
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194 config_set = config_admin_jids;
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195 elseif role_name == "prosody:operator" then
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196 config_set = config_global_admin_jids;
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197 end
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198 if config_set then
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199 local config_admin_users = config_set / function (admin_jid)
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200 local j_node, j_host = jid_split(admin_jid);
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201 if j_host == host then
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202 return j_node;
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203 end
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204 end;
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205 return it.to_array(config_admin_users + primary_role_users + secondary_role_users);
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206 end
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207 return it.to_array(primary_role_users + secondary_role_users);
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208 end
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209
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210 function get_jid_role(jid)
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211 local bare_jid = jid_bare(jid);
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212 if config_global_admin_jids:contains(bare_jid) then
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213 return role_registry["prosody:operator"];
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214 elseif config_admin_jids:contains(bare_jid) then
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215 return role_registry["prosody:admin"];
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216 end
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217 return nil;
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218 end
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219
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220 function set_jid_role(jid, role_name) -- luacheck: ignore 212
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221 return false;
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222 end
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223
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224 function get_jids_with_role(role_name)
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225 -- Fetch role users from storage
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226 local storage_role_jids = array.map(get_users_with_role(role_name), function (username)
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227 return username.."@"..host;
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228 end);
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229 if role_name == "prosody:admin" then
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230 return it.to_array(config_admin_jids + set.new(storage_role_jids));
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231 elseif role_name == "prosody:operator" then
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232 return it.to_array(config_global_admin_jids + set.new(storage_role_jids));
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233 end
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234 return storage_role_jids;
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235 end
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236
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237 function add_default_permission(role_name, action, policy)
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238 local role = role_registry[role_name];
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239 if not role then
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240 module:log("warn", "Attempt to add default permission for unknown role: %s", role_name);
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241 return nil, "no-such-role";
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242 end
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243 if policy == nil then policy = true; end
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244 module:log("debug", "Adding policy %s for permission %s on role %s", policy, action, role_name);
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245 return role:set_permission(action, policy);
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246 end
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247
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248 function get_role_by_name(role_name)
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249 return assert(role_registry[role_name], role_name);
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250 end
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251
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252 -- COMPAT: Migrate from 0.12 role storage
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253 local function do_migration(migrate_host)
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254 local old_role_store = assert(module:context(migrate_host):open_store("roles"));
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255 local new_role_store = assert(module:context(migrate_host):open_store("account_roles"));
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256
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257 local migrated, failed, skipped = 0, 0, 0;
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258 -- Iterate all users
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259 for username in assert(old_role_store:users()) do
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260 local old_roles = it.to_array(it.filter(function (k) return k:sub(1,1) ~= "_"; end, it.keys(old_role_store:get(username))));
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261 if #old_roles == 1 then
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262 local ok, err = new_role_store:set(username, {
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263 _default = old_roles[1];
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264 });
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265 if ok then
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266 migrated = migrated + 1;
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267 else
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268 failed = failed + 1;
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269 print("EE: Failed to store new role info for '"..username.."': "..err);
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270 end
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271 else
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272 print("WW: User '"..username.."' has multiple roles and cannot be automatically migrated");
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273 skipped = skipped + 1;
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274 end
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275 end
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276 return migrated, failed, skipped;
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277 end
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278
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279 function module.command(arg)
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280 if arg[1] == "migrate" then
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281 table.remove(arg, 1);
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282 local migrate_host = arg[1];
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283 if not migrate_host or not prosody.hosts[migrate_host] then
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284 print("EE: Please supply a valid host to migrate to the new role storage");
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285 return 1;
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286 end
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287
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288 -- Initialize storage layer
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289 require "core.storagemanager".initialize_host(migrate_host);
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290
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291 print("II: Migrating roles...");
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292 local migrated, failed, skipped = do_migration(migrate_host);
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293 print(("II: %d migrated, %d failed, %d skipped"):format(migrated, failed, skipped));
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294 return (failed + skipped == 0) and 0 or 1;
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295 else
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296 print("EE: Unknown command: "..(arg[1] or "<none given>"));
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297 print(" Hint: try 'migrate'?");
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298 end
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299 end