docs(05-02): complete shell decoder cross-validation tests plan
- SUMMARY.md: 6/6 tests pass (single, multi, no-compress, empty, large, Cyrillic) - STATE.md: Phase 5 complete, 8 plans total, 80% progress - ROADMAP.md: Phase 5 marked complete (2/2 plans) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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NikitolProject
@@ -16,7 +16,7 @@ Decimal phases appear between their surrounding integers in numeric order.
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- [x] **Phase 2: Core Archiver** - Rust CLI that compresses, encrypts, and packs files into the custom format (completed 2026-02-24)
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- [x] **Phase 3: Round-Trip Verification** - Rust unpack command + golden test vectors + unit tests proving byte-identical round-trips (completed 2026-02-24)
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- [x] **Phase 4: Kotlin Decoder** - Android 13 decoder using javax.crypto and java.util.zip (primary extraction path) (completed 2026-02-25)
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- [ ] **Phase 5: Shell Decoder** - Busybox shell script decoder using dd/xxd/openssl/gunzip (fallback extraction)
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- [x] **Phase 5: Shell Decoder** - Busybox shell script decoder using dd/xxd/openssl/gunzip (fallback extraction) (completed 2026-02-25)
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- [ ] **Phase 6: Obfuscation Hardening** - XOR-obfuscated headers, encrypted file table, decoy padding to defeat casual analysis
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## Phase Details
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@@ -91,8 +91,8 @@ Plans:
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**Plans**: 2 plans
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Plans:
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- [ ] 05-01-PLAN.md -- Shell decode.sh: busybox-compatible decoder with full pipeline (dd/xxd/openssl/gunzip)
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- [ ] 05-02-PLAN.md -- Cross-validation test script and end-to-end verification (6 test cases)
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- [x] 05-01-PLAN.md -- Shell decode.sh: busybox-compatible decoder with full pipeline (dd/xxd/openssl/gunzip)
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- [x] 05-02-PLAN.md -- Cross-validation test script and end-to-end verification (6 test cases)
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### Phase 6: Obfuscation Hardening
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**Goal**: Archive format resists casual analysis -- binwalk, file, strings, and hex editors reveal nothing useful
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@@ -119,5 +119,5 @@ Phases execute in numeric order: 1 -> 2 -> 3 -> 4 -> 5 -> 6
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| 2. Core Archiver | 2/2 | Complete | 2026-02-24 |
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| 3. Round-Trip Verification | 2/2 | Complete | 2026-02-24 |
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| 4. Kotlin Decoder | 1/1 | Complete | 2026-02-24 |
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| 5. Shell Decoder | 0/2 | Not started | - |
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| 5. Shell Decoder | 2/2 | Complete | 2026-02-25 |
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| 6. Obfuscation Hardening | 0/1 | Not started | - |
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@@ -5,22 +5,22 @@
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See: .planning/PROJECT.md (updated 2026-02-24)
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**Core value:** Archive impossible to unpack without knowing the format -- standard tools (7z, tar, unzip, binwalk) cannot recognize or extract contents
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**Current focus:** Phase 5 in progress (Shell Decoder)
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**Current focus:** Phase 5 complete (Shell Decoder). Ready for Phase 6.
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## Current Position
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Phase: 5 of 6 (Shell Decoder)
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Plan: 1 of 2 in current phase
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Status: Plan 1 complete, Plan 2 (cross-validation tests) remaining
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Last activity: 2026-02-25 -- Busybox-compatible shell decoder script (shell/decode.sh)
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Phase: 5 of 6 (Shell Decoder) -- COMPLETE
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Plan: 2 of 2 in current phase (all done)
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Status: Phase 5 complete -- both decoder and cross-validation tests done
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Last activity: 2026-02-25 -- Cross-validation tests for shell decoder (shell/test_decoder.sh)
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Progress: [███████░░░] 70%
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Progress: [████████░░] 80%
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 7
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- Average duration: 4.1 min
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- Total plans completed: 8
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- Average duration: 3.9 min
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- Total execution time: 0.5 hours
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**By Phase:**
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@@ -31,10 +31,10 @@ Progress: [███████░░░] 70%
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| 2. Core Archiver | 2/2 | 6 min | 3 min |
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| 3. Round-Trip Verification | 2/2 | 8 min | 4 min |
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| 4. Kotlin Decoder | 1/1 | 4 min | 4 min |
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| 5. Shell Decoder | 1/2 | 3 min | 3 min |
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| 5. Shell Decoder | 2/2 | 5 min | 2.5 min |
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**Recent Trend:**
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- Last 5 plans: 2min, 3min, 5min, 4min, 3min
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- Last 5 plans: 3min, 5min, 4min, 3min, 2min
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- Trend: stable
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*Updated after each plan completion*
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@@ -72,6 +72,8 @@ Recent decisions affecting current work:
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- Phase 5: Graceful HMAC degradation when openssl lacks -mac support
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- Phase 5: Extract ciphertext to temp file before decryption (avoids pipe buffering issues)
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- Phase 5: LC_ALL=C for predictable byte handling across locales
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- Phase 5: All 6 cross-validation tests passed on first run -- decode.sh was correct as written
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- Phase 5: Used sh (not bash) to invoke decode.sh in tests for POSIX compatibility validation
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### Pending Todos
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@@ -86,5 +88,5 @@ None yet.
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## Session Continuity
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Last session: 2026-02-25
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Stopped at: Completed 05-01-PLAN.md (Shell decoder script; Phase 5 Plan 1 of 2)
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Stopped at: Completed 05-02-PLAN.md (Shell decoder cross-validation tests; Phase 5 complete)
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Resume file: None
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105
.planning/phases/05-shell-decoder/05-02-SUMMARY.md
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105
.planning/phases/05-shell-decoder/05-02-SUMMARY.md
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@@ -0,0 +1,105 @@
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---
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phase: 05-shell-decoder
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plan: 02
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subsystem: shell-decoder
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tags: [posix-sh, cross-validation, sha256, test-script, busybox, cyrillic]
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# Dependency graph
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requires:
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- phase: 05-shell-decoder
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plan: 01
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provides: "shell/decode.sh -- busybox-compatible POSIX shell decoder"
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- phase: 02-core-archiver
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provides: "Rust archiver CLI for creating test archives"
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provides:
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- "shell/test_decoder.sh -- cross-validation test script (6 tests, Rust pack -> Shell decode -> SHA-256 verify)"
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- "Validated shell decoder correctness across all edge cases: text, binary, no-compress, empty, large, Cyrillic filenames"
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affects: [06-obfuscation]
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# Tech tracking
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tech-stack:
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added: [bash-test-framework]
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patterns: [cross-validation-testing, rust-pack-shell-decode-sha256-verify]
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key-files:
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created:
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- shell/test_decoder.sh
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key-decisions:
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- "All 6 tests passed on first run -- no decode.sh fixes needed"
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- "Used sh (not bash) to invoke decode.sh in tests for POSIX compatibility validation"
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- "Followed kotlin/test_decoder.sh pattern for consistency across decoder test suites"
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patterns-established:
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- "Cross-validation test pattern: Rust pack -> decoder unpack -> SHA-256 comparison (reusable for any decoder)"
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- "Test script structure: prerequisites -> build -> test cases -> summary with pass/fail counts"
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requirements-completed: [SHL-01, SHL-02, SHL-03]
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# Metrics
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duration: 2min
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completed: 2026-02-25
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---
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# Phase 5 Plan 2: Shell Decoder Cross-Validation Tests Summary
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**Cross-validation test script with 6 test cases (single file, multiple files, no-compress, empty, large 100KB, Cyrillic filename) all passing on first run via Rust pack -> sh decode.sh -> SHA-256 verify**
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## Performance
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- **Duration:** 2 min
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- **Started:** 2026-02-24T22:42:47Z
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- **Completed:** 2026-02-24T22:44:38Z
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- **Tasks:** 2
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- **Files created:** 1
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## Accomplishments
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- Created comprehensive cross-validation test script (275 lines) following kotlin/test_decoder.sh pattern
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- All 6 test cases passed on first run with zero decode.sh fixes needed
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- Validated SHL-01 (single text file), SHL-02 (no-compress mode), and SHL-03 (Cyrillic UTF-8 filename)
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- Verified shell decoder produces byte-identical output to originals via SHA-256 comparison
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- Confirmed existing Rust test suite (6 tests) still passes -- no regressions
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## Task Commits
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Each task was committed atomically:
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1. **Task 1: Create shell/test_decoder.sh cross-validation test script** - `e9d7442` (test)
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2. **Task 2: Run cross-validation tests and fix any decode.sh issues** - no commit (all tests passed, no fixes needed)
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## Files Created/Modified
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- `shell/test_decoder.sh` - Cross-validation test script: 6 test cases covering all edge cases for shell decoder
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## Decisions Made
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- All 6 tests passed on first run -- decode.sh implementation from Plan 1 was correct
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- Used `sh "$DECODER"` (not `bash`) to invoke decode.sh, ensuring POSIX sh compatibility is tested
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- Followed kotlin/test_decoder.sh pattern exactly for consistency across decoder test suites
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- 7 total assertions across 6 tests (Test 2 verifies both text.txt and binary.bin)
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## Deviations from Plan
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None - plan executed exactly as written.
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## Issues Encountered
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None.
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## User Setup Required
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None - no external service configuration required.
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## Next Phase Readiness
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- Shell decoder fully validated with cross-validation tests
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- Phase 5 (Shell Decoder) is complete: both decode script and test suite done
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- Phase 6 (Obfuscation) can extend decode.sh with XOR header deobfuscation and encrypted TOC parsing
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- Test script can serve as regression test when obfuscation layer is added
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---
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## Self-Check: PASSED
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- FOUND: shell/test_decoder.sh
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- FOUND: commit e9d7442
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- FOUND: 05-02-SUMMARY.md
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---
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*Phase: 05-shell-decoder*
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*Completed: 2026-02-25*
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