Convert PEM traditional private key to PKCS8 private key

Question

I\'ve been given a PEM file with a certificate and pub/private keys. Specifically it includes the headers

-----BEGIN CERTIFICATE-----   
-----END CERTIFICAT         


        

Answer 1

To convert the private key from PKCS#1 to PKCS#8 with openssl:

# openssl pkcs8 -topk8 -inform PEM -outform PEM -nocrypt -in pkcs1.key -out pkcs8.key

That will work as long as you have the PKCS#1 key in PEM (text format) as described in the question.

Answer 2

Try using following command. I haven't tried it but I think it should work.

openssl pkcs8 -topk8 -inform PEM -outform DER -in filename -out filename -nocrypt