Signing with Apksigner

To sign an individual APK file using Apksigner, use the following command:

$ANDROID_HOME/build-tools/31.0.0/apksigner sign --provider-class sun.security.pkcs11.SunPKCS11 --provider-arg <your_pkcs11.cfg_file> --ks NONE --ks-type PKCS11 --ks-pass pass:<anything> --ks-key-alias <keypair_alias> --in <unsigned.apk> --out <signed.apk> (should test)