I have the PFX file that currently generates the Digital signature, private key and public key. However, the generated RSA keys from the PFX files are 256 bytes in length.

I want to have the public and private keys of less than 72 bytes in size.

Is there any option that i can generate the keys(less than 72 bytes) using the PFX file. if this is not possible, please provide any alternate ways to achieve this objective.

is there a way to generate keys from PFX file using ECC instead of RSA?