使用openssl生成公钥与私钥

1.生成RSA私钥：

  genrsa -out demo.txt 1024                                                                                                                                    生成1024位的私钥 如下图：                                                                                      

2.将私钥转换成PKCS8格式：                                                                                                                                      pkcs8 -topk8 -inform PEM -in demo.txt  -outform PEM –nocrypt                                                                           PKCS8格式的私钥如下图                                                                                                                                  

3.生成RSA公钥：