The best way to generate a bitcoin public key from an current non-public key utilizing openssl?

February 16, 2023

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I need to generate bitcoin priv/pub key manually.
I generated random binary numbers by flipping some cash and transformed them to hex.

Now,I received a bitcoin non-public key
in hex:d1267088f0defab13969dd34c899d28268119cf9e68f3856d0ee9b581f5a1bca

in WIF:L4EGhR5Fdon96W2zepTAE3CxtayBqiN3v2pBmkB9dxG4r8JaVKf2

the best way to gerate Public Key utilizing openssl command line in linux?

I attempted to make use of

openssl ec -in priv_key.pem -pubout

however terminal stated: unable to load Key, and much error file uris.

Maby I received one thing flawed with PEM non-public key format.

The priv_key.pem ,I transformed non-public key hex to base64 format.

-----BEGIN EC PRIVATE KEY-----
ZDEyNjcwODhmMGRlZmFiMTM5NjlkZDM0Yzg5OWQyODI2ODExOWNmOWU2OGYzODU2
ZDBlZTliNTgxZjVhMWJjYQ==
-----END EC PRIVATE KEY-----