Formats
- PKCS1
-----BEGIN RSA PRIVATE KEY----------BEGIN RSA PUBLIC KEY-----
- PKCS8
- generic key with embedded PKCS1 key
-----BEGIN PRIVATE KEY----------BEGIN PUBLIC KEY-----
- https://tls.mbed.org/kb/cryptography/asn1-key-structures-in-der-and-pem
Code
# PKCS1
openssl genrsa -out private_pkcs1.pem
# PKCS8
openssl pkcs8 -topk8 -inform PEM -outform PEM -nocrypt -in private_pkcs1.pem -out private_pkcs8.pem
# PKCS8
openssl rsa -in private_pkcs1.pem -out public_pkcs8.pem -outform PEM -pubout
# PKCS1
openssl rsa -in private_pkcs1.pem -RSAPublicKey_out -out public_pkcs1.pem
# for ssh
ssh-keygen -f public_pkcs8.pem -i -mPKCS8 > public.ssh