I just reproduced the broken behavior using CAS 5.3.5 and 5.3.7-SNAPSHOT.
We are preparing to upgrade our CAS server but have not tested Google Apps
since our initial work with 5.2.x, when it did work correctly IIRC.

We are going to pursue pretty aggressively because it has major
consequences for us.

Thank you for reporting this and your work to identify the cause.

-dirk

On Thu, Dec 13, 2018 at 9:49 AM JF Poulin <[email protected]> wrote:

> I patched the CompressionUtils file and replaced the inflate function with
> the one from 5.1.x and now GoogleApps is working again.
>
> Was there a reason the function was re-written in the first place other
> than trying to make it more efficient? I'm thinking of submitting a pull
> request to revert the code for inflate back.
>
> On Wednesday, December 12, 2018 at 3:48:39 PM UTC-5, JF Poulin wrote:
>>
>> After a lot of debugging, I have discovered that the XML is not being
>> properly inflated in AbstractSaml20ObjectBuilder at line 442:
>> CompressionUtils.inflate(decodedBytes);
>>
>> java is complaining about the zip header
>>
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