Match RSA private key to Certificate

== Step One ==
Run the following command on the key file to determine the modulus:
openssl rsa -noout -text -in secure.server.com.pem

=== Example Output ===

Private-Key: (1024 bit)modulus:    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:    00:00:00:00:00:00:00:00:00    ...

== Step Two ==
Run the following command on the certificate file to match the modulus:
openssl x509 -noout -text -in secure.server.com.pem

=== Example Output ===

    ...            RSA Public Key: (1024 bit)                Modulus (1024 bit):                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:                    00:00:00:00:00:00:00:00:00    ...

If they match the certificate and key match.

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Tags: apache, certificates, openssl, private key, Public Key, rsa, ssl, sysadmin

This entry was posted on June 16, 2007 at June 16, 2007 and is filed under Tips. You can follow any responses to this entry through the RSS 2.0 feed.