Step 1: Create CSR request

openssl  req -x509 -newkey rsa:2048 -keyout test1-key.pem -out test1-cert.pem

pass phrase: test1



Step 2: Remove passphrase

openssl rsa -in test1-key.pem -out test1-key.pem



Step 3: Get Public Key

openssl rsa -in test1-key.pem -pubout > test1-pubkey.pem