Google Play Games Services works...

∟Reference Citations in 2018

∟Google Play Games Services works...

'Introduction to DES Algorithm' tutorial was cited in coronalabs.com forum in 2018..

The "keytool" Importing Certificates in DER and PEM tutorial was cited in coronalabs.com forum in 2018.

Subject: Google Play Games Services works when game is installed
   from apk, does not if installed from Play Store
Date: May 16 2018
Author: agramonte
Source: https://forums.coronalabs.com/topic
   /72723-google-play-games-services-works-when-game-is-installed
   -from-apk-does-not-if-installed-from-play-store/

>Hi everybody.
>
>I'm facing a problem that is making me crazy, maybe someone can help me.
>
>The problem is with the gpgs.login function: if I install the game apk on
>my phone it works good, if I upload the exact same apk on google play (no
>matter if as open beta or close alpha) and install it, it stop working.
>
>What happens is, the game shows the google play games panel as if it
>wanted to ask to choose an account, and then the panel just disappear and
>the login fails.
>
>The error message it receive (event.errorMessage, as in the
>documentation) is "sign in failed" (code = 10002).
>...

...
I think we are talking about the same thing. On my desktop, I have both
the upload key (Key A) and the google signing key (Key B ). I test with
Key B but I can't use that one to upload to Google.

I didn't download them. I don't know how to create a key.store from .der
file. I created both keys and uploaded them to google.

Edit: I did find links online to convert that .der file to keystore. So
it can be done and then you would have both keys like I have.

https://www.herongyang.com/Cryptography
   /Certificate-Format-keytool-Import-in-DER-and-PEM.html