Secure Sockets Layer environment variables

SSL-specific environment variables get exposed to common gateway interface (CGI) applications and server-side includes (SSI) processed pages.

We can categorize these variables into three types:

• Variables for information regarding the SSL handshake

• Variables for exposing the server certificate information

• Variables for exposing client certificate information, if we enable client authentication.

When making a valid SSL request, the SSL handshake environment variables and the server certificate environment variables are set. Setting client authentication to either optional or require, results in the client certificate environment variables setting.

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Sub-topics

Secure Sockets Layer handshake environment variables

Server certificate environment variables

Client certificate environment variables