On Tue, 2012-10-02 at 08:40 +0200, Ole Wolf wrote:
> On lør, 2012-09-22 at 21:54 +0200, Patrick Ohly wrote: 
> I had some trouble with Google's API which turned out to be buggy, but
> I managed to work around it.

Can you provide details? I'm currently at CalConnect, sitting a few
chairs away from Google developers who work on the GData API. I can try
to get them to look at these bugs.

> The code currently demonstrates that Google's requirement that users
> manually authorize applications to access their data can easily be
> circumvented, meaning that it provides a false sense of security. All
> you need to do is provide your Google username and password to an
> application, and it will be able to do anything with any of your
> Google data without you knowing any better.

Your probably mean the two-factor login? Can you point me to the code
which circumvents that requirement and/or provide a high-level
description how that is done?

I have a hunch that you use the main username/password to create per-app
passwords. I don't think two-factor login is meant to protect against
that. As soon as someone has the main username/password, obviously the
door is wide open.

What per-app passwords provide is limitation of damage that occurs when
those passwords are leaked. Instead of having access to everything, the
attacker only has access to a subset of the Google services.

Incidentally, enabling two-factor login leads to a hard to debug user
error: I had done that a while back, then tried to log into Google
CardDAV with my main username/password, which failed with a 401
credential error. There was no hint that I had to create per-app
credentials as part of the HTTP error message, which made it hard to
make the connection to two-factor login as the root cause.

A single-sign-on system with Google support would have helped a lot
here.

> Right now my primary concern is how to determine which Google Task
> corresponds to an iCal todo entry. I hope some of you who have
> experience synchronizing data can help me out here.
> 
> Google Tasks have unique IDs, but they're read-only. So if the Google
> Task is created first, then the Google Task ID could be used as a UID.
> However, if the iCal todo is created first, then its UID cannot be
> copied to the Google Task ID. Similarly, a Google Task includes a
> self-link which uniquely identifies the task (basically because its
> UID is repeated in the self-link; hopefully this data redundancy
> doesn't reflect the design of Google's Tasks database), but it's
> read-only, too. This leaves only "due date," "title," and "notes" as
> candidates for identifying the tasks, and even they are rather prone
> to change.
> 
> Is it generally acceptable to create, say, an "x-google-task-uid:"
> with the Google Task ID in the VTODO section and use that to
> synchronize with?
>
> Similarly, since Google Tasks include a handful of fields that don't
> correspond to any iCalendar keys, should they be named with some
> "x-google-task-<property>"?

Both would be possible and desirable.

-- 
Best Regards, Patrick Ohly

The content of this message is my personal opinion only and although
I am an employee of Intel, the statements I make here in no way
represent Intel's position on the issue, nor am I authorized to speak
on behalf of Intel on this matter.


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