I am using a computer provided by my work org and I do not have any access to change firewall since I am just a user.
I am trying to install Composer to start on a symfony 2 project. When I try Composer exe file to install, I see this message - The "https://getcomposer.org/versions" file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed
failed to open stream: Cannot connect to HTTPS server through proxy
I Googled it but the solutions all given are related to firewall and can be solved by an Admin only.
It seems that you have network issues: Cannot connect to HTTPS server through proxy. You probably might want to work this out but since you have no access to network settings then it will be easier just to use Manual Download option from https://getcomposer.org/download/ . Just download composer.phar file from this url