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Download x509 certificate from ssl host

Posted on 2011-03-11
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Last Modified: 2012-05-11
Hi,

Is there any tool with i can put host params like ip and port and it downloads cert file on my computer?
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Question by:lavitz
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Dave Howe earned 500 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:
-----BEGIN CERTIFICATE-----
and
-----END CERTIFICATE-----
(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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