abc3 closed pull request #1141: js translation to erlang _users/_design/auth (#666) URL: https://github.com/apache/couchdb/pull/1141
This is a PR merged from a forked repository. As GitHub hides the original diff on merge, it is displayed below for the sake of provenance: As this is a foreign pull request (from a fork), the diff is supplied below (as it won't show otherwise due to GitHub magic): diff --git a/src/couch/include/couch_erl_functions.hrl b/src/couch/include/couch_erl_functions.hrl new file mode 100644 index 0000000000..a95f190a60 --- /dev/null +++ b/src/couch/include/couch_erl_functions.hrl @@ -0,0 +1,147 @@ +% Licensed under the Apache License, Version 2.0 (the "License"); you may not +% use this file except in compliance with the License. You may obtain a copy of +% the License at +% +% http://www.apache.org/licenses/LICENSE-2.0 +% +% Unless required by applicable law or agreed to in writing, software +% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +% License for the specific language governing permissions and limitations under +% the License. + +-define(AUTH_DB_DOC_VALIDATE_FUNCTION, + % if operation is not update a OldDoc param is null atom + fun({NewDoc}, OldDoc, {UserCtx}, {SecObj}) -> + OldDocName = case OldDoc of + {Doc} when is_list(Doc) -> couch_util:get_value(<<"name">>, Doc); + _ -> undefined + end, + % see if the user is a server admin + IsAdmin = lists:member( + <<"_admin">>, + couch_util:get_value(<<"roles">>, UserCtx) + ), + NewUserCxtName = couch_util:get_value(<<"name">>, UserCtx), + case couch_util:get_value(<<"_deleted">>, NewDoc) =:= true of + true -> + if + % allow deletes by admins and matching users + % without checking the other fields + IsAdmin or NewUserCxtName =:= OldDocName -> 1; + true -> throw({ + forbidden, + <<"Only admins may delete other user docs.">> + }) + end; + _ -> + NewDocName = couch_util:get_value(<<"name">>, NewDoc), + NewDocRoles = couch_util:get_value(<<"roles">>, NewDoc), + RolesIsBinary = lists:foldl(fun + (_, false) -> false; + (E, _) when is_binary(E) -> true; + (_, _) -> false + end, true, NewDocRoles), + NewDocId = couch_util:get_value(<<"_id">>, NewDoc), + NewPassShaDoc = couch_util:get_value(<<"password_sha">>, NewDoc, false), + NewSaltDoc = couch_util:get_value(<<"salt">>, NewDoc, false), + NewPassSchemeDoc = couch_util:get_value(<<"password_scheme">>, NewDoc), + NewIterationsDoc = couch_util:get_value(<<"iterations">>, NewDoc), + NewDerivedKeyDoc = couch_util:get_value(<<"derived_key">>, NewDoc), + NewDocType = couch_util:get_value(<<"type">>, NewDoc), + if + % we only allow user docs for now + NewDocType =/= <<"user">> -> + throw({forbidden, <<"doc.type must be user.">>}); + NewDocName =:= undefined -> + throw({forbidden, <<"doc.name is required.">>}); + NewDocRoles =:= undefined -> + throw({forbidden, <<"doc.roles must exist.">>}); + is_list(NewDocRoles) =:= false -> + throw({forbidden, <<"doc.roles must be an array.">>}); + RolesIsBinary =:= false -> + throw({forbidden, <<"doc.roles can only contain strings.">>}); + NewDocId =/= <<"org.couchdb.user:", NewDocName/binary>> -> + throw({ + forbidden, + <<"Doc ID must be of the form org.couchdb.user:name.">> + }); + OldDoc =/= null, OldDocName =/= NewDocName -> + throw({forbidden, <<"Usernames can not be changed.">>}); + NewPassShaDoc, not NewSaltDoc -> + throw({ + forbidden, + <<"Users with password_sha must have a salt. ", + "See /_utils/script/couch.js for example code.">> + }); + NewPassSchemeDoc =:= <<"pbkdf2">>, not is_number(NewIterationsDoc) -> + throw({forbidden, <<"iterations must be a number.">>}); + NewPassSchemeDoc =:= <<"pbkdf2">>, not is_binary(NewDerivedKeyDoc) -> + throw({forbidden, <<"derived_key must be a string.">>}); + true -> ok + end, + + % see if the user a database admin specified by name + Admins = couch_util:get_value(<<"admins">>, SecObj, []), + DbAdmin = lists:member(NewUserCxtName, Admins), + DbRoles = couch_util:get_value(<<"roles">>, Admins, []), + % see if the user a database admin specified by role + IsAdminRole = if + length(Admins) > 0, length(DbRoles) > 0 -> + lists:foldl(fun + (UserRole, true) -> true; + (UserRole, _) -> lists:member(UserRole, DbRoles) + end, false, couch_util:get_value(<<"roles">>, UserCtx, [])); + true -> false + end, + IsServerOrDatabaseAdmin = if + IsAdmin -> true; + SecObj =/= [], DbAdmin -> true; + SecObj =/= [], IsAdminRole -> true; + true -> false % default to no admin + end, + + NewRolesSort = lists:sort(NewDocRoles), + UserCtxName = couch_util:get_value(<<"name">>, UserCtx), + if + OldDoc =/= null, not IsServerOrDatabaseAdmin, NewDocName =/= UserCtxName -> + throw({forbidden, <<"You may only update your own user document.">>}); + OldDoc =/= null, not IsServerOrDatabaseAdmin, length(NewRolesSort) > 0 -> + throw({forbidden, <<"Only _admin may set roles.">>}); + OldDoc =/= null -> + % validate role updates + {D} = OldDoc, + OldRoles = lists:sort(couch_util:get_value(<<"roles">>, D)), + if + OldRoles =/= NewRolesSort -> + throw({forbidden, <<"Only _admin may edit roles.">>}); + true -> ok + end; + length(NewRolesSort) > 0, not IsServerOrDatabaseAdmin -> + throw({forbidden, <<"Only _admin may edit roles.">>}); + true -> ok + end, + lists:foreach(fun + (<<"_", _/bits>>) -> + throw({forbidden, <<"No system roles (starting with underscore) in users db.">>}); + (_) -> ok + end, NewDocRoles), + case NewDocName of + <<"_", _/bits>> -> + throw({forbidden, <<"Username may not start with underscore.">>}); + _ -> ok + end, + BadUserNameChars = [<<":">>], + lists:foreach(fun(Char) -> + CharInName = binary:split(NewDocName, Char), + if + length(CharInName) > 1 -> + throw({forbidden, <<"Character `", + Char/bits, "` is not allowed in usernames.">>}); + true -> ok + end + end, BadUserNameChars), + 1 + end + end +). ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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