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There are plenty of resources out there about this topic, but none I found which covers this slightly special case.

I have 4 files;

  • privatekey.pem
  • certificate.pem
  • intermediate_rapidssl.pem
  • ca_geotrust_global.pem

And I wish to import them into a fresh keystore.

Some site suggest to use DER-format, and import them one by one, but this failed because the key is not recognized.

Another site suggested a special "ImportKey"-class to run for import, and this worked until I saw that the chain is broken. I.e. the chain length on the certificate is 1, ignoring the intermediate and ca.

Some sites suggest PKCS7, but I can't even get a chain from that. Other suggest PKCS12 format, but as far as my tests go that failed as well for getting the whole chain.

Any advice or hints are much welcome.

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1 Answer 1

up vote 2 down vote accepted

This may not be perfect, but I had some notes on my use of keytool that I've modified for your scenario.

  1. Import a root or intermediate CA certificate to an existing Java keystore:

    keytool -import -trustcacerts -alias root -file ca_geotrust_global.pem -keystore yourkeystore.jks
    keytool -import -trustcacerts -alias root -file intermediate_rapidssl.pem -keystore yourkeystore.jks 
    
  2. Combine the certificate and private key into one file before importing.

    cat certificate.pem privatekey.pem > combined.pem
    

    This should result in a file resembling the below format.

    BEGIN CERTIFICATE
    ...
    END CERTIFICATE
    BEGIN RSA PRIVATE KEY
    ...
    END RSA PRIVATE KEY

  3. Import a signed primary certificate & key to an existing Java keystore:

    keytool -import -trustcacerts -alias yourdomain -file combined.pem -keystore yourkeystore.jks
    
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