tools

openssl

certificate

https

pem

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Bash - download public *.pem certificate from https connection

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Created by:

Payne

654

In this short article, we would like to show how to download public certificate from indicated domain that uses HTTPS protocol.

Run the following command:

openssl s_client -showcerts -connect some-domain.com:443 < /dev/null 2> /dev/null | openssl x509 -outform PEM > downloaded_cert.pem

Where:

openssl s_client -showcerts -connect some-domain.com:443 < /dev/null 2> /dev/null

downloads certificate omitting occurred errors,

openssl x509 -outform PEM > downloaded_cert.pem

converts certificate to *.pem format.

Practical example

This section shows how to get dirask.com cetificate.

Run following command:

openssl s_client -showcerts -connect dirask.com:443 < /dev/null 2> /dev/null | openssl x509 -outform PEM

Example output:

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