安装 OpenSSL 工具
	
		
			Linux 用户(以 Ubuntu 为例)
		
sudo apt-get install openssl
		
			Windows 用户
		
			开发者可以在 OpenSSL 官方网站下载 Windows 的 OpenSSL 安装包 进行安装。
	
 
	以管理员身份运行cmd.exe
	C:\Windows\system32>cd C:\Program Files\OpenSSL-Win32\bin
	 
	C:\Program Files\OpenSSL-Win32\bin>openssl.exe
	OpenSSL> genrsa -out rsa_private_key.pem 1024
	Loading 'screen' into random state - done
	Generating RSA private key, 1024 bit long modulus
	........++++++
	.................++++++
	e is 65537 (0x10001)
	OpenSSL> pkcs8 -topk8 -inform PEM -in rsa_private_key.pem -outform PEM -nocrypt -out rsa_private_key_pkcs8.pem
	OpenSSL> rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem
	writing RSA key
	OpenSSL> exit
	 
	C:\Program Files\OpenSSL-Win32\bin>