6 Commits (d83d734b7582a82474edc3b52fe9d0adfb8ef188)

Author	SHA1	Message	Date
Paul Fitzpatrick	4ab096d179	(core) granular access control in the presence of schema changes ... Summary: - Support schema changes in the presence of non-trivial ACL rules. - Fix update of `aclFormulaParsed` when updating formulas automatically after schema change. - Filter private metadata in broadcasts, not just fetches. Censorship method is unchanged, just refactored. - Allow only owners to change ACL rules. - Force reloads if rules are changed. - Track rule changes within bundle, for clarity during schema changes - tableId and colId changes create a muddle otherwise. - Show or forbid pages dynamically depending on user's access to its sections. Logic unchanged, just no longer requires reload. - Fix calculation of pre-existing rows touched by a bundle, in the presence of schema changes. - Gray out acl page for non-owners. Test Plan: added tests Reviewers: dsagal Reviewed By: dsagal Differential Revision: https://phab.getgrist.com/D2734	4 years ago
Paul Fitzpatrick	0e2deecc55	(core) implement cleaner row-level access control for outgoing messages ... Summary: This implements row-level access control for outgoing messages, replacing the document reloading placeholder that was there before. * Prior to broadcasting messages, GranularAccess is notified of actions+undo. * While broadcasting messages to different sessions, if we find we need row level access control information, rows before and after the change are reconstructed. * Messages are rewritten if rows that were previously forbidden are now allowed, and vice versa. The diff is somewhat under-tested and under-optimized. Next step would be to implement row-level access control for incoming actions, which may result in some rejiggering of the code from this diff to avoid duplication of effort under some conditions. Test Plan: added test Reviewers: dsagal Reviewed By: dsagal Differential Revision: https://phab.getgrist.com/D2670	4 years ago
Paul Fitzpatrick	a4929bde72	(core) add some row-level access control ... Summary: This implements a form of row-level access control where for a given table, you may specify that only owners have access to rows for which a given column has falsy values. For simplicity: * Only owners may edit that table. * Non-owners with the document open will have forced reloads whenever the table is modified. Baby steps... Test Plan: added tests Reviewers: dsagal Reviewed By: dsagal Differential Revision: https://phab.getgrist.com/D2633	4 years ago
Paul Fitzpatrick	45d2d5f897	(core) back-end support for tables that are accessible only by owners ... Summary: This makes it possible to serve a table or tables only to owners. * The _grist_ACLResources table is abused (temporarily) such that rows of the form `{colId: '~o', tableId}` are interpreted as meaning that `tableId` is private to owners. * Many websocket and api endpoints are updated to preserve the privacy of these tables. * In a document where some tables are private, a lot of capabilities are turned off for non-owners to avoid leaking info indirectly. * The client is tweaked minimally, to show '-' where a page with some private material would otherwise go. No attempt is made to protect data from private tables pulled into non-private tables via formulas. There are some known leaks remaining: * Changes to the schema of private tables are still broadcast to all clients (fixable). * Non-owner may be able to access snapshots or make forks or use other corners of API (fixable). * Changing name of table makes it public, since tableId in ACLResource is not updated (fixable). Security will require some work, the attack surface is large. Test Plan: added tests Reviewers: dsagal Reviewed By: dsagal Differential Revision: https://phab.getgrist.com/D2604	4 years ago
Paul Fitzpatrick	526fda4eba	(core) make user role available in ActiveDoc methods ... Summary: This makes the user's role (owner/editor/viewer) available in ActiveDoc methods. No use of that information is made yet, other than to log it. The bulk of the diff is getting a handle on the various ways the methods can be called, and systematizing it a bit more. In passing, access control is added to broadcasts of document changes, so users who no longer have access to a document do not receive changes if they still have the document open. Test Plan: existing tests pass; test for broadcast access control added Reviewers: dsagal Reviewed By: dsagal Differential Revision: https://phab.getgrist.com/D2599	4 years ago
Paul Fitzpatrick	5ef889addd	(core) move home server into core ... Summary: This moves enough server material into core to run a home server. The data engine is not yet incorporated (though in manual testing it works when ported). Test Plan: existing tests pass Reviewers: dsagal Reviewed By: dsagal Differential Revision: https://phab.getgrist.com/D2552	4 years ago