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List:       openssh-bugs
Subject:    [Bug 3659] New: Certificates are ignored when listing revoked items in a (binary) revocation list
From:       bugzilla-daemon () mindrot ! org
Date:       2024-01-24 11:23:34
Message-ID: bug-3659-705 () https ! bugzilla ! mindrot ! org/
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https://bugzilla.mindrot.org/show_bug.cgi?id=3659

            Bug ID: 3659
           Summary: Certificates are ignored when listing revoked items in
                    a (binary) revocation list
           Product: Portable OpenSSH
           Version: 9.2p1
          Hardware: All
                OS: All
            Status: NEW
          Severity: minor
          Priority: P5
         Component: ssh-keygen
          Assignee: unassigned-bugs@mindrot.org
          Reporter: webmaster@mmf-research.de

1. Create a blank binary revocation list:
  ssh-keygen -Qlf my.krl
  # KRL version 0
  # Generated at 20240122T162948

2. Revoke a key, and a certificate:
  ssh-keygen -kuf my.krl user1_id25519.pub user2_id25519-cert.pub
  Revoking from user1_id25519.pub
  Revoking from user2_id25519-cert.pub

3. Check the successful revocation:
  ssh-keygen -Qf my.krl user1_id25519.pub user2_id25519-cert.pub
  > user1_id25519.pub (USER1 ID): REVOKED
  > user2_id25519-cert.pub (USER2 ID): REVOKED

4. Displaying the updated content of the revocation list will ignore
the certificate:
  ssh-keygen -Qlf my.krl
  # KRL version 0
  # Generated at 20240122T162948
  hash: SHA256:SHA256:3IJIl... # ssh-ed25519
  # CA key ssh-ed25519 SHA256:f4o3Bp...
  serial: 3007

I would expect the revoked certificate to show up in this list, too.
Note that in my setup, the SSH daemon correctly denies login with the
revoked certificate. It seems that just the KRL/CRL content listing is
affected.

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