openssl生成RSA密钥
生成私钥
openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -out private_key.pem
通过私钥生成公钥
openssl rsa -pubout -in private_key.pem -out public_key.pem
openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -out private_key.pem
openssl rsa -pubout -in private_key.pem -out public_key.pem