How to generate .cer and .key from .pfx

Generate .cer and .key from a pfx file using a openssl utility

openssl pkcs12 -in [FILE].pfx -clcerts -nokeys -out[FILE].cer
openssl pkcs12 -in [FILE].pfx -nocerts -nodes  -out [FILE].key

Delete a passphrase from kex file:

openssl rsa -in [fichier].key -out [new-fichier].key