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openssl-cheat-sheet's Introduction

OpenSSL cheat sheet

Generating/manipulating keys

Generate a .pem from crt and key files

cat foo.com.crt foo.com.key gd_bundle.crt > foo.com.pem

Testing SSL connections

Run the command, depending on the protocol you want to test (make sure you're testing the right host:port). If everything is OK, you should see output similar to this, ending with Verify return code: 0 (ok):

SSL-Session:
    Protocol  : TLSv1
    Cipher    : DHE-RSA-AES256-SHA
    Session-ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    Session-ID-ctx:
    Master-Key: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    Key-Arg   : None
    Start Time: 1452531417
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)

HTTP / IMAP / POP3 / SMTP

openssl s_client -connect hostname.com:443

IMAP / POP3/ SMTP (StartTLS)

openssl s_client -starttls smtp -crlf -connect hostname.name:587

Contributing

Any contributions (small and large) are very welcome! Please fork the repository, make your changes and send me a pull request or just open a new ticket.

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