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fix(id): validate friend_remove request IDs - #4368

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dezren39 merged 1 commit into
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queue/5756-3146-friend-remove-validation
Nov 2, 2026
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dezren39 merged 1 commit into
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queue/5756-3146-friend-remove-validation

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@dezren39

@dezren39 dezren39 commented Nov 2, 2026 •

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Summary

  • Bound friend_remove request IDs to the producer invariant of at most three entries.
  • Require each ID to be exactly 32 lowercase hexadecimal characters; invalid requests are refused as Forbidden before storage/application.
  • Add parsed(), ArtifactLog::insert, and Directory::receive_artifact regressions, including no-mutation on refusal; preserve the legitimate removal round trip.

Verification

  • rustfmt --check --edition 2024 pkgs/id/src/artifact.rs pkgs/id/src/directory.rs — pass.
  • git diff --check — pass.
  • cargo test --manifest-path pkgs/id/Cargo.toml --no-default-features --lib friend_removal — laptop run in progress; GitHub Actions is the required CI verification.

Fixes #3146
Part of #3231.


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dezren39 requested a review from a team as a code owner November 2, 2026 13:03
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  • pkgs/id/src/artifact.rs
  • pkgs/id/src/directory.rs
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📝 Code Review ✅ Completed 2026-11-02T13:06:53.654889Z 4d58d23 PR opened
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💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 4d58d2326e

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Comment thread pkgs/id/src/artifact.rs
Comment on lines +342 to +346
if body
.requests
.iter()
.any(|request| !is_friend_request_id(request))
{

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P2 Badge Validate incoming request IDs before accepting friendships

If a remote peer sends a correctly signed friend request with an ID such as r1, Directory::receive still accepts it: Envelope::verify checks the signature but not the ID format, and acceptance preserves that ID in friend_requests. Subsequently, the normal RemoveFriend action calls remove_friend, which includes the stored ID in its artifact; this new check rejects it with Forbidden, leaving the friendship intact. Validate IDs at envelope admission as well, and handle already-persisted noncanonical IDs so these friendships remain removable.

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Disposition (task 5756): valid finding, not fixed in PR #4368 by scope. Issue #3146 is Phase 1 of design #3231 and is scoped to friend_remove requests validation in parsed(); validating incoming friend-request IDs at envelope admission (Directory::receive / Envelope::verify) plus migration handling for already-persisted noncanonical IDs is a separate receipt surface in the same design family. It is recorded for the Phase 3 field-by-field receipt-validation audit, issue #3232, with a comment carrying this finding and the r1 example, so the audit dispositions it explicitly rather than it being expanded into this Phase 1 PR. PR #4368 remains merge-blocked only on its pending checks, not on this thread.

@dezren39
dezren39 merged commit 3cbb607 into main Nov 2, 2026
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@dezren39
dezren39 deleted the queue/5756-3146-friend-remove-validation branch November 2, 2026 15:26
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