Click to download OpenSSL
What should be distinguished between window and linux
Unzip the file
Double click:
Win32OpenSSL-0_9_8l_95895.exe
After installation is complete
OpenSSLbinopenssl.exe
Enter the command to generate a private key
genrsa -out private-rsa.pem
Enter the command to generate the public key
rsa -in private-rsa.pem -pubout -out public-rsa.cer