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Status Functionality already exists
Workspace DataPower Gateway
Created by Guest
Created on Apr 24, 2025

RELATED IDEAS

To enable IDG to validate root certificate

As cloud service providers increasingly move towards automated certificate renewal processes, gateway flexibility in certificate validation becomes crucial. The ability to validate using root certificates helps prevent API 500 SSL errors during automatic renewals.

For IBM Datapower Gateway (IDG), the following validation methods is available:

  • Match exact certificate or immediate issuer

  • Full certificate chain checking (PKIX)

  • Match exact certificate

AWS's auto-renewal system, for instance, triggers renewal of both intermediate and leaf/base certificates. AWS recommends adding the root certificate to the truststore to maintain uninterrupted service during renewals.

The impending change by Certificate Authority (CA) communities to reduce maximum TLS certificate lifetimes to 47 days further emphasises the importance of robust automated certificate management. This shorter lifecycle will require more sophisticated validation methods and automated renewal processes to maintain service availability.

https://www.digicert.com/blog/tls-certificate-lifetimes-will-officially-reduce-to-47-days

Idea priority Urgent
  • Admin
    Ulas Cubuk
    Jun 24, 2025

    As Pierce stated, in DataPower, PKIX validation can be performed with the root certificate in the Validation Credential (trust store) object. This means that if the certificate chain is leaf -> intermediate -> root (trusted CA), DataPower can still validate the client certificate even if the trust store contains only the root certificate. It's fine as long as the client presents the entire certificate chain, including the intermediate certificate(s), during the TLS handshake.

    I am marking this as "Functionality already exists" based on the fact that DataPower has the ability to validate using the root certificate. This capability allows DataPower to successfully validate client certificates without requiring the intermediate certificate(s) to be stored in the trust store.

    If you have a different requirement or use case that is not covered by this existing functionality, please provide more details and we can evaluate further.

    2 replies
  • Guest
    Jun 23, 2025

    Hi Thank for the comment.

    For AWS end they will auto renew the intermediate and the base certificate without anyone knowing.

    Therefore, without the correct base or intermeidate certificate, the PKIX mode will not work if it just root to root validation CA.

    Reply
  • Guest
    Jun 12, 2025

    The PKIX mode just does what you are requesting. As long as the server is sending its intermediate CA certificates along with its leaf certificate, the Validation Credentials object just needs to contain the root CA.

    Reply

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