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[GH-ISSUE #4305] [Feature] Report stapled notarization tickets and quarantine attributes without contacting Apple #1710
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opened 2026-10-16 21:09:18 +00:00 by bsakaguchi
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Originally created by @coygeek on GitHub (Oct 16, 2026).
Original GitHub issue: https://github.com/morluto/rea/issues/4305
Before submitting
Area
Evidence, artifacts, or reconstruction
Current limitation
Before running or triaging a downloaded Mac app, disk image or installer package, an analyst wants two local facts. Does the item carry a stapled notarization ticket? Is it marked with the
com.apple.quarantineorcom.apple.provenanceextended attributes that Gatekeeper uses? REA reports neither, and the only Apple tool that checks a staple (stapler validate) contacts Apple's ticketing service. This request asks REA to report staple state asstapled,not stapled,not applicableorunknown, and to report those extended attributes as observed. Nothing is sent over the network, and REA never concludes "notarized" or "not notarized" from a staple alone.Observations use REA 6.5.0 (npm
rea-agents@6.5.0, tagrea-agents-6.5.0, commit3b79af28e80785afce9f5998d8f03289402a1847) on macOS 27.0.1 (26A434) arm64 with Xcode 27.0 (27A266a). The cited source files are unchanged on main atd52a488.mkdir dmgsrc && cp ./lc dmgsrc/ && hdiutil create -srcfolder dmgsrc -format UDZO fx.dmg, wherelcis anyclangoutput) marked withxattr -w com.apple.quarantine "0081;00000000;rea-fixture;" fx.dmg:rea inspect-signature ./fx.dmgfails withcapability_unavailable: "Active artifact is not Mach-O; its container-level signature layer is not evaluated by codesign." (NativeMacOSProvider.ts L573-L580).rea inspect-artifact ./fx.dmg --jsonreturns a DMG inventory with no staple or extended-attribute information. No REA source at the tag reads extended attributes (noxattrorgetxattrhits undersrc/).inspect_signatureinspects a byte copy of the main executable and always states "filesystem-bound signing context and trust validation are not examined" (L632). A ticket stapled to the bundle is therefore never seen.xcrun stapler validateprinted "does not have a ticket stapled to it" (exit 65) for stock/System/Applications/Stickies.app, for stock/bin/lsand for the self-built disk image. For/bin/ls, Apple says stapling is impossible, so "not applicable" is the accurate state.man staplersays "stapler requires internet access to retrieve tickets when stapling or validating", and thatvalidatecompares the stapled ticket "to the latest ticket retrieved from the ticketing service".stapler validateaccepted on the test host contains a top-levelContents/CodeResourcesfile, separate fromContents/_CodeSignature/CodeResources, whose bytes begin with ASCIIs8ch. Stickies.app has no such file. Apple's documentation in the cited pages does not describe where or how a ticket is stored, so this location and prefix are observations, not a documented format.com.apple.provenanceattribute.xattr -dand-wxdid not change it.Use cases
No response
Desired outcome and success criteria
For an app bundle, a disk image, a flat installer package, a ZIP or a bare Mach-O selected as the target, REA reports:
stapled: a ticket was found; report its location in the target, size and SHA-256.not stapled: a format that supports stapling, with no ticket found.not applicable: a format Apple says cannot carry a staple (ZIP archives and standalone binaries).unknown: REA cannot establish ticket detection for the format, or the read failed; the reason is given.unknown, notnot stapled.stapler validate, CloudKit, notary API or other network request runs by default. Any network check would be a separate, explicitly requested operation and is not part of this request.com.apple.quarantine(as text and bytes) andcom.apple.provenance(as bytes).absentmeans the attribute is not set;unknownmeans it could not be read.Acceptance criteria
fx.dmg(above), afterxattr -w com.apple.quarantine "0081;00000000;rea-fixture;" fx.dmg: staple state isnot stapled;com.apple.quarantineis reported with raw value0081;00000000;rea-fixture;and decoded agent namerea-fixture(matchingURLResourceValues.quarantinePropertieson the same file); provenance matchesxattr -px com.apple.provenance fx.dmg(present with the same bytes, or absent).clang: staple state isnot applicablewith the reason "tickets cannot be stapled to standalone binaries", notnot stapled.ditto -c -k --keepParent dmgsrc fx.zip: staple state isnot applicable(ZIP)./System/Applications/Stickies.app: staple state isnot stapled, and the result contains no "not notarized" claim.xcrun stapler validateaccepts (any notarized, stapled app the verifier owns): staple state isstapled, with a location, size and SHA-256 equal to the ticket file's path,statsize andshasum -a 256, and a limitation that validity and revocation were not checked. On the one stapled sample examined while drafting, that file wasContents/CodeResources; this is an observation from one sample, not a documented location.com.apple.quarantineasabsent.Expected interaction with targets
Read existing files or captured data
Target and scope details (optional)
Affected area
Apple target inspection on macOS: the operation that reports staple state and extended attributes for
.app,.dmg,.pkg,.zipand Mach-O targets (a new field in an existing tool or a new operation), its schema, generated tool documentation, and tests with self-built fixtures.Non-goals
spctl,syspolicy_check,gktool), XProtect, and App Translocation.Verification available so far
I can suggest a sample or manual check
Verification details (optional)
No response
Alternatives considered
stapler validate. This is authoritative but contacts Apple, conflates "unsupported format" with "not stapled" for bare binaries, and needs macOS.Possible direction
No response
References
Apple documentation:
staplertool". "While you can notarize a ZIP archive, you can't staple to it directly." "Although tickets are created for standalone binaries, it's not currently possible to staple tickets to them."stapler"uses CloudKit to download tickets".launchdno longer supports loadinglaunchdproperty list files with the quarantine extended attribute."com.apple.quarantine, any part ofcom.apple.provenance, or where a ticket is stored in a bundle, disk image or package.REA history:
Contents/CodeResources(SHA-256 and size;not-applicablefor a bare Mach-O) as part of a larger signing-posture change. It recorded that no CI fixture can hold a real staple without Apple notarization. Maintainers: is staple and quarantine reporting still wanted, and should it live ininspect_signatureor in artifact inspection?