How to get keystore file from signed apk

Question

I have already signed my apk with default debug.keystore key.But unfortunately my system destroyed,Now I need to get the key store from the already signed apk.

to replac

Answer 1

unzip -p Name-of-apk.apk META-INF/CERT.RSA | keytool -printcert

is what I used.

It produces information such as the owner, issuer, serial number, valid through, certificate finger prints, signature algorithms and version.