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[GH-ISSUE #1431] [Feature] HarmonyOS/OpenHarmony package and Ark bytecode analysis (ArkDecompiler evaluation) #487
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opened 2026-10-15 18:25:30 +00:00 by bsakaguchi
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Originally created by @N0zoM1z0 on GitHub (Oct 10, 2026).
Original GitHub issue: https://github.com/morluto/rea/issues/1431
Area
Managed runtime, bytecode and packaged-application analysis
Current limitation and goal
Investigate a reusable static reverse-engineering workflow for HarmonyOS NEXT / OpenHarmony application artifacts, prompted by JD ArkDecompiler. Analysts should be able to identify a package, inspect its modules and entry points, examine selected Ark bytecode/functions, and follow evidenced native-library boundaries through equivalent CLI/MCP workflows.
This is a deferred research roadmap, requested by the maintainer to retain the opportunity. Current implementation priorities remain bug fixes, stability and output usability. This issue does not start feature implementation or a release. Parent: #42. Future runtime work can coordinate with #1267 and #968.
Research date: 2026-10-10; REA baseline
f4a0c1ce95375c1661ca95b414829113a10298b8. Open/closed issue and PR searches for Harmony, ArkTS, ArkDecompiler, HAP and Panda found no focused proposal. REA's existing Android/JADX adapter is relevant reuse experience; its APK/DEX support does not establish Ark bytecode support.Ecosystem and artifact scope
The official package overview and Stage build/release structure establish several distinct targets:
.hap.hsp.apppack.info; preserve each child package's identity and provenance..har/ OHPM metadata.abc/ textual.paresources.index, resource/profile files and.solibraries: connect observed resource references and native imports/exports to their owning module. AOT/profile artifacts require separate identification and coverage.Do not treat all Harmony products or SDK generations as equivalent. Start with a recorded Stage-model/compiler/bytecode combination. Older FA packages use a different layout and
config.json; Stage build inputs use JSON5 while installed products usemodule.json. Identify contents rather than assuming.hapalways means.abcor treating a package extension as an Android target.The official bytecode format documentation is explicitly based on 12.0.6.0 and describes PANDA magic, an internal four-part bytecode version, offsets/indexes and MUTF-8 strings. That version is distinct from application version, SDK/API level and tool version. Runtime Core also has separate dynamic and static-core specifications. Verify dialect compatibility; filename/magic alone cannot establish decompiler coverage.
Upstream candidates and limits
ark_disasm.abcto assembly; reports format/minimum-supported versions and can include byte positions. Strong first disassembly baseline. Options that skip literals must not silently remove evidence..abcandark_disasmoutput. Upstream calls it rudimentary and does not guarantee correctness. Declares AGPL-3.0; distribution/use choice needs explicit license review.JD's CLI entry point accepts an input and output filename (
xabc input.abc output.ts) and selects dynamic bytecode. Its currentmainignores the decompilation return value and returns zero: exit status alone is not success proof. Its preparation script selects OpenHarmony 6.0.0.1 sources; upstream also requires local compiler/dependency patches, while its Docker recipe selects 5.1.0. Pin one working combination; do not run these scripts as REA setup or assume current master components build together.ArkAnalyzer is adjacent static-analysis prior art and points to its maintained OpenHarmony-SIG repository. It is not proof of binary-decompiler compatibility. Cangjie–ArkTS interoperability introduces another language/native boundary; record such artifacts explicitly and defer language-specific recovery until independently justified.
Suggested increments and acceptance
ark_disasmand/or a proven structured reader; inspect one selected record/function and references, retaining raw identifiers, bytes/offsets, literal values and unresolved targets. Map native loading/registration only where supported by evidence; static references are not observed runtime calls.xabcplus its compatible libraries. Retain original artifact identity and raw disassembly, record exact provider/compiler versions, validate actual produced output, preserve partial failures, and classify generated ArkTS as derived evidence. Missing source names/types/locations remain unknown.Acceptance must use source-generated public fixtures compiled/packaged by the actual pinned toolchain, then exercise the compiled CLI, actual SDK-connected stdio MCP and an installed REA package with real providers. Include multi-module/shared-library packages, imports/exports, literals, closures/async/exception flow, stripped/obfuscated information, resource references and a known native bridge. Compare observations against producer outputs; never require reconstructed source to equal original source.
Also test malformed/checksum/version/offset failures, Unicode/MUTF-8 strings and names, duplicate archive entries/path escape/decompression pressure, incomplete modules, missing/mismatched tooling, provider crashes/zero-status failures, cancellation and large producer output. Bound process/output retention by documented resource constraints, preserve collected evidence, and declare examined scope/completeness. Selected results should avoid copying entire bytecode, AST and source into every label or response; coordinate retained Evidence/views with #1065 instead of duplicating its shared transport work. Serialized size is not a model-token or billing measurement.
REA remains local-only and the first increment is static/read-only. Do not execute target applications, re-sign/repack them, drive a GUI, install device services, upgrade Java/Node/SDKs, or modify global toolchain settings as part of discovery. Reuse upstream code where appropriate, pin provenance and review actual redistributed component licenses.
Research status: documentation, repository metadata, CLI source and alternative tool boundaries reviewed using
gh. No SDK/compiler/decompiler was installed or executed for this issue. API availability and upstream claims do not establish REA support; record verified host/dialect/version combinations separately when implementation begins.@asmjmp0 commented on GitHub (Oct 22, 2026):
how about xpanda.I've submitted a PR. https://github.com/morluto/rea/pull/6288