sys64738

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====== SSL handling with openssl ======

===== Generate private key =====

Generate private key with a bit lenght of 2048. 2048 bits is minimum for this time of writing.


  openssl genrsa -out <Filename of private key.key> 2048

===== Generate CSR =====

Generate CSR (Customer Signing request) using private key.


  openssl req -new -key <Filename of private key.key> -out <Filename of CSR.csr>
  
Fill out questions when asked. CN is very important. Provide CSR to CA for signing.
  
===== List content of CSR =====

  openssl req -noout -text -in <Filename of CSR.csr>

===== List content of signed certificate or intermediate certificate =====

openssl x509 -in <certificate filename.crt> -noout -text


===== List information about web site SSL certificate =====

 openssl s_client -showcerts -connect <host to check>:443

sys64738

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