Image with multiple cosign signatures fail verification in RHACS

Solution Verified - Updated -

Issue

  • When an image is signed with 2 different keys, an ACS policy what checks validity of the signature fails with the error invalid signature when validating ASN.1 encoded signature. When checked with cosign directly, the image signature is verified.

Environment

  • Red Hat Advance Cluster Security for Kubernetes (RHACS)
    • 4.x

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