Kamino@DESKTOP-P5MRQLU MINGW64 ~/Desktop/Nouveau dossier
$ ls
platform.pk8  platform.x509.pem  platform_import_keystore*

Kamino@DESKTOP-P5MRQLU MINGW64 ~/Desktop/Nouveau dossier
$ ./platform_import_keystore -k testpass -p testpass -a platform
openssl pkcs8 -in platform.pk8 -inform DER -outform PEM -out platform.priv.pem -nocrypt
openssl pkcs12 -export -in platform.x509.pem -inkey platform.priv.pem -out platform.pk12 -name platform -password pass:testpass
keytool -J-Duser.language=en -importkeystore -destkeystore keystore.jks -srckeystore platform.pk12 -srcstoretype PKCS12 -deststorepass testpass -srcstorepass testpass
Importing keystore platform.pk12 to keystore.jks...
Entry for alias platform successfully imported.
Import command completed:  1 entries successfully imported, 0 entries failed or cancelled

Warning:
<platform> uses the MD5withRSA signature algorithm which is considered a security risk.
The JKS keystore uses a proprietary format. It is recommended to migrate to PKCS12 which is an industry standard format using "keytool -importkeystore -srckeystore keystore.jks -destkeystore keystore.jks -deststoretype pkcs12".
keytool -J-Duser.language=en -keypasswd -keystore keystore.jks -alias platform -storepass testpass -new testpass

Warning:
The JKS keystore uses a proprietary format. It is recommended to migrate to PKCS12 which is an industry standard format using "keytool -importkeystore -srckeystore keystore.jks -destkeystore keystore.jks -deststoretype pkcs12".

Kamino@DESKTOP-P5MRQLU MINGW64 ~/Desktop/Nouveau dossier
$ ls
keystore.jks  platform.pk8  platform.x509.pem  platform_import_keystore*

Kamino@D