Download x509 certificate from ssl host

Posted on 2011-03-11
Medium Priority
Last Modified: 2012-05-11

Is there any tool with i can put host params like ip and port and it downloads cert file on my computer?
Question by:lavitz
1 Comment
LVL 33

Accepted Solution

Dave Howe earned 2000 total points
ID: 35108109
yes, several :)

openssl program with the s_client parameter can pull certs from a remote port. try for example:

openssl s_client  -connect www.google.com:443

and cut and paste the section between:
(including those two lines) into a file called cert.cer (or whatever.cer)

ditto, you can use
gnutls-cli --print-cert -p 443 www.google.com 

There is no benefit to using gnutls in this case, but if you are (for example) wanting to get a cert from a mail server that requires you to type "STARTTLS" first, it is invaluable.

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