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  1. Home
  2. Technical Discussion
  3. Question re: Origin Based Security Model (FEP-fe34)

Question re: Origin Based Security Model (FEP-fe34)

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activitypubsecurityfe34fep
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  • thisismissem@activitypub.spaceT This user is from outside of this forum
    thisismissem@activitypub.spaceT This user is from outside of this forum
    thisismissem@activitypub.space
    wrote last edited by
    #3

    Well, yeah, that's why I linked what T&S is doing here to fix the moderator use case. At present I don't know of anyone sending cross-actor delete/update actions, so we'd be adding capability with the moderatedBy

    julian@activitypub.spaceJ 1 Reply Last reply
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    • thisismissem@activitypub.spaceT thisismissem@activitypub.space

      Well, yeah, that's why I linked what T&S is doing here to fix the moderator use case. At present I don't know of anyone sending cross-actor delete/update actions, so we'd be adding capability with the moderatedBy

      julian@activitypub.spaceJ This user is from outside of this forum
      julian@activitypub.spaceJ This user is from outside of this forum
      julian@activitypub.space
      wrote last edited by
      #4

      @thisismissem hmm, I believe Lemmy and Piefed send cross actor Deletes, but they might be Announces by the group actor.

      They (and I) don't use moderatedBy but rather the group actor's attributedTo

      Just want to make sure you're aware of that existing prior art.

      julian@activitypub.spaceJ 1 Reply Last reply
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      • julian@activitypub.spaceJ julian@activitypub.space

        @thisismissem hmm, I believe Lemmy and Piefed send cross actor Deletes, but they might be Announces by the group actor.

        They (and I) don't use moderatedBy but rather the group actor's attributedTo

        Just want to make sure you're aware of that existing prior art.

        julian@activitypub.spaceJ This user is from outside of this forum
        julian@activitypub.spaceJ This user is from outside of this forum
        julian@activitypub.space
        wrote last edited by
        #5

        @nutomic@lemmy.ml @rimu@piefed.social @bent0_b0x@norden.social — do y'all send Delete activities with the moderator actor?

        (Announce wrapping aside.)

        rimu@piefed.socialR 1 Reply Last reply
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        • julian@activitypub.spaceJ julian@activitypub.space

          @nutomic@lemmy.ml @rimu@piefed.social @bent0_b0x@norden.social — do y'all send Delete activities with the moderator actor?

          (Announce wrapping aside.)

          rimu@piefed.socialR This user is from outside of this forum
          rimu@piefed.socialR This user is from outside of this forum
          rimu@piefed.social
          wrote last edited by
          #6

          Yes.

          This is easy in FEP 1b12-land because each community has a list of moderators so receiving instances know who to allow.

          Getting a list of instance admins requires calling the Lemmy API, unfortunately. So PieFed has a cron job that does that once per day for all instances. Admins rarely change.

          julian@activitypub.spaceJ nutomic@lemmy.mlN 2 Replies Last reply
          0
          • rimu@piefed.socialR rimu@piefed.social

            Yes.

            This is easy in FEP 1b12-land because each community has a list of moderators so receiving instances know who to allow.

            Getting a list of instance admins requires calling the Lemmy API, unfortunately. So PieFed has a cron job that does that once per day for all instances. Admins rarely change.

            julian@activitypub.spaceJ This user is from outside of this forum
            julian@activitypub.spaceJ This user is from outside of this forum
            julian@activitypub.space
            wrote last edited by
            #7

            > @rimu@piefed.social said:
            >
            > Getting a list of instance admins requires calling the Lemmy API, unfortunately.

            Wait, why don't we write a mini FEP to extend this? attributedTo on the instance/application actor?

            • https://codeberg.org/fediverse/fep/src/branch/main/fep/2677/fep-2677.md
            • extending 1b12
            rimu@piefed.socialR 1 Reply Last reply
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            • julian@activitypub.spaceJ julian@activitypub.space

              > @rimu@piefed.social said:
              >
              > Getting a list of instance admins requires calling the Lemmy API, unfortunately.

              Wait, why don't we write a mini FEP to extend this? attributedTo on the instance/application actor?

              • https://codeberg.org/fediverse/fep/src/branch/main/fep/2677/fep-2677.md
              • extending 1b12
              rimu@piefed.socialR This user is from outside of this forum
              rimu@piefed.socialR This user is from outside of this forum
              rimu@piefed.social
              wrote last edited by
              #8

              That sounds fine to me.

              On communities the moderators are just an array of strings which are the activitypub actor IDs of the mods. I think NodeBB has an array of actor objects though?

              Anyway whatever it is, consistency with how the communities do it would be nice.

              julian@activitypub.spaceJ 1 Reply Last reply
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              • rimu@piefed.socialR rimu@piefed.social

                That sounds fine to me.

                On communities the moderators are just an array of strings which are the activitypub actor IDs of the mods. I think NodeBB has an array of actor objects though?

                Anyway whatever it is, consistency with how the communities do it would be nice.

                julian@activitypub.spaceJ This user is from outside of this forum
                julian@activitypub.spaceJ This user is from outside of this forum
                julian@activitypub.space
                wrote last edited by
                #9

                > @rimu@piefed.social said:
                >
                > I think NodeBB has an array of actor objects though

                Is this causing problems for you? I can send just the IDs instead.

                rimu@piefed.socialR 1 Reply Last reply
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                • julian@activitypub.spaceJ julian@activitypub.space

                  > @rimu@piefed.social said:
                  >
                  > I think NodeBB has an array of actor objects though

                  Is this causing problems for you? I can send just the IDs instead.

                  rimu@piefed.socialR This user is from outside of this forum
                  rimu@piefed.socialR This user is from outside of this forum
                  rimu@piefed.social
                  wrote last edited by
                  #10

                  It's fine, I've already adjusted the code at my end. I don't know about Lemmy though.

                  nutomic@lemmy.mlN 1 Reply Last reply
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                  • rimu@piefed.socialR rimu@piefed.social

                    Yes.

                    This is easy in FEP 1b12-land because each community has a list of moderators so receiving instances know who to allow.

                    Getting a list of instance admins requires calling the Lemmy API, unfortunately. So PieFed has a cron job that does that once per day for all instances. Admins rarely change.

                    nutomic@lemmy.mlN This user is from outside of this forum
                    nutomic@lemmy.mlN This user is from outside of this forum
                    nutomic@lemmy.ml
                    wrote last edited by
                    #11

                    Lemmy doesnt even federate admin status in any way, instead we trust that actions which are coming from the same instance as the community or post are valid. So essentially origin-based security model.

                    1 Reply Last reply
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                    • rimu@piefed.socialR rimu@piefed.social

                      It's fine, I've already adjusted the code at my end. I don't know about Lemmy though.

                      nutomic@lemmy.mlN This user is from outside of this forum
                      nutomic@lemmy.mlN This user is from outside of this forum
                      nutomic@lemmy.ml
                      wrote last edited by
                      #12

                      Looks like this, only IDs: https://github.com/LemmyNet/lemmy/blob/main/crates/apub/apub/assets/lemmy/collections/group_moderators.json

                      julian@activitypub.spaceJ 1 Reply Last reply
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                      • nutomic@lemmy.mlN nutomic@lemmy.ml

                        Looks like this, only IDs: https://github.com/LemmyNet/lemmy/blob/main/crates/apub/apub/assets/lemmy/collections/group_moderators.json

                        julian@activitypub.spaceJ This user is from outside of this forum
                        julian@activitypub.spaceJ This user is from outside of this forum
                        julian@activitypub.space
                        wrote last edited by
                        #13

                        Right, that's the "Group Moderation" section of FEP 1b12, right?

                        It may be a good idea to extend this concept to the instance/application actor as well. There's no urgent need to implement and consume, but it would be fairly simple thing to serve on our respective softwares I think.

                        nutomic@lemmy.mlN 1 Reply Last reply
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                        • julian@activitypub.spaceJ julian@activitypub.space

                          Right, that's the "Group Moderation" section of FEP 1b12, right?

                          It may be a good idea to extend this concept to the instance/application actor as well. There's no urgent need to implement and consume, but it would be fairly simple thing to serve on our respective softwares I think.

                          nutomic@lemmy.mlN This user is from outside of this forum
                          nutomic@lemmy.mlN This user is from outside of this forum
                          nutomic@lemmy.ml
                          wrote last edited by
                          #14

                          Yes exactly that FEP. Federating admin status would make sense for informational purposes, but rejecting mod actions based on that could cause problems as I mentioned in my previous comment.

                          julian@activitypub.spaceJ 1 Reply Last reply
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                          • nutomic@lemmy.mlN nutomic@lemmy.ml

                            Yes exactly that FEP. Federating admin status would make sense for informational purposes, but rejecting mod actions based on that could cause problems as I mentioned in my previous comment.

                            julian@activitypub.spaceJ This user is from outside of this forum
                            julian@activitypub.spaceJ This user is from outside of this forum
                            julian@activitypub.space
                            wrote last edited by
                            #15

                            > @nutomic@lemmy.ml said:
                            >
                            > but rejecting mod actions based on that could cause problems as I mentioned in my previous comment.

                            So to confirm then, you serve the moderator collection but you don't use it to determine whether an actor is able to modify/delete content on that instance, is that right?

                            Curious to know what those problems are.

                            nutomic@lemmy.mlN 1 Reply Last reply
                            0
                            • julian@activitypub.spaceJ julian@activitypub.space

                              > @nutomic@lemmy.ml said:
                              >
                              > but rejecting mod actions based on that could cause problems as I mentioned in my previous comment.

                              So to confirm then, you serve the moderator collection but you don't use it to determine whether an actor is able to modify/delete content on that instance, is that right?

                              Curious to know what those problems are.

                              nutomic@lemmy.mlN This user is from outside of this forum
                              nutomic@lemmy.mlN This user is from outside of this forum
                              nutomic@lemmy.ml
                              wrote last edited by
                              #16

                              We use the moderator collection. But if that fails we check if the mod is from the same instance as the community or the post/comment being removed. If thats true we also allow the action.

                              1 Reply Last reply
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