Android certificate is expired

Question

I currently have an error message when signing my app, saying that the certificate is expired (not the debug one). (I know that is surprising since Android certificate should be available many years !). I can't create a new certificate because I get an error when updating my apk on the PlayStore (certificate of the apk have to be the same as the previous one)

Is it even possible to renew my keystore ?

Is the only possiblity create a new application ?

Answer 1

Maybe (but I never tested) you can regenerate a certificate with the same couple public/private keys. If it does not work, unfortunately I think you will have to generate a new certificate. Do not forget to add the -validity <valdays> option with a very large number of days. You will also have to change the package name as explained in this blog post.

UPDATE

According to @KIDdAe comment (see below), Google verifies the SHA1 fingerprint of the certificate and not only the certificate signature with the public key. Therefore recreating a new certificate with the same key is useless since the SHA1 of that new certificate will differ from the initial one.