1. 生成带有DES3加密的RSA密钥对方法：

Generate private key:
openssl genrsa -des3 -out private.pem 1024

Generate public key:
openssl rsa -in private.pem -out public.pem -outform PEM -pubout

2. 直接生成，不对密钥对进行加密：

Generate private key:
openssl genrsa -out private.pem 1024

Generate public key:
openssl rsa -in private.pem -out public.pem -outform PEM -pubout