4eaedc2872
- Add 06-01-SUMMARY.md with execution results - Update STATE.md: phase 6, plan 1/2, 90% progress - Update ROADMAP.md: phase 06 plan progress 1/2 - Mark FMT-06, FMT-07, FMT-08 complete in REQUIREMENTS.md Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
98 lines
4.6 KiB
Markdown
98 lines
4.6 KiB
Markdown
# Project State
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## Project Reference
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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 6 in progress (Obfuscation Hardening). Plan 1 of 2 complete.
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## Current Position
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Phase: 6 of 6 (Obfuscation Hardening)
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Plan: 1 of 2 in current phase
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Status: Plan 06-01 complete -- Rust archiver obfuscation pipeline implemented
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Last activity: 2026-02-25 -- XOR headers, encrypted TOC, decoy padding in Rust archiver
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Progress: [█████████░] 90%
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 9
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- Average duration: 3.8 min
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- Total execution time: 0.6 hours
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**By Phase:**
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| Phase | Plans | Total | Avg/Plan |
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|-------|-------|-------|----------|
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| 1. Format Specification | 1 | 7 min | 7 min |
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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 | 2/2 | 5 min | 2.5 min |
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| 6. Obfuscation Hardening | 1/2 | 3 min | 3 min |
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**Recent Trend:**
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- Last 5 plans: 5min, 4min, 3min, 2min, 3min
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- Trend: stable
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*Updated after each plan completion*
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## Accumulated Context
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### Decisions
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Decisions are logged in PROJECT.md Key Decisions table.
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Recent decisions affecting current work:
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- Roadmap: Format spec must precede all implementation (all three decoders build against same spec)
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- Roadmap: Obfuscation (XOR headers, encrypted TOC, decoy padding) deferred to Phase 6 after all decoders work without it
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- Phase 1: IV stored only in TOC, not duplicated in data blocks (simplifies shell dd extraction)
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- Phase 1: Same 32-byte key for AES-256-CBC and HMAC-SHA-256 in v1 (v2 will use HKDF)
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- Phase 1: Magic bytes 0x00 0xEA 0x72 0x63 (leading null signals binary)
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- Phase 1: HMAC scope = IV (16 bytes) || ciphertext (encrypted_size bytes)
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- Phase 2: Used rand::Fill::fill() for IV generation (correct rand 0.9 API)
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- Phase 2: Manual binary serialization with to_le_bytes/from_le_bytes (no serde/bincode)
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- Phase 2: Filename-only entry names (not full paths) for archive portability
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- Phase 2: HMAC failure skips file and continues; SHA-256 mismatch warns but writes
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- Phase 2: Flags bit 0 set only when at least one file is actually compressed
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- Phase 3: Library crate with pub mod re-exports for all 6 modules
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- Phase 3: Unit tests embedded in modules via #[cfg(test)] (not separate files)
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- Phase 3: hex-literal v1.1 for compile-time SHA-256 known-value assertions
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- Phase 3: Corrected HMAC golden vector (openssl pipe+xxd produced wrong value; verified with file input and Python)
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- Phase 3: cargo_bin! macro for non-deprecated assert_cmd binary resolution
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- Phase 3: 11MB deterministic pseudo-random data for large file test (wrapping_mul Knuth hash)
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- Phase 4: Single-file Kotlin decoder (ArchiveDecoder.kt) for simplicity and Android embeddability
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- Phase 4: RandomAccessFile for seeking to data blocks instead of reading entire archive into memory
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- Phase 4: HMAC failure skips file, SHA-256 mismatch warns but writes (matching Rust behavior)
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- Phase 4: Kotlin signed byte handling with .toByte() for literals > 0x7F, contentEquals() for ByteArray comparison
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- Phase 5: POSIX sh (not bash) for maximum busybox compatibility
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- Phase 5: xxd/od auto-detection at startup for hex conversion
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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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- Phase 6: Always enable all 3 obfuscation features (no --no-obfuscate flag in v1)
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- Phase 6: Decoy padding range 64-4096 bytes per file (FORMAT.md allows up to 65535)
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- Phase 6: Shared read_archive_metadata() helper for unpack/inspect de-obfuscation
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- Phase 6: Two-pass TOC serialization for correct data_offsets with encrypted TOC size
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### Pending Todos
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None yet.
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### Blockers/Concerns
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- RESOLVED: openssl enc with -K/-iv flags implemented in shell decoder; script fails gracefully if openssl missing
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- RESOLVED: xxd/od auto-detection implemented in shell decoder (xxd primary, od fallback)
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- RESOLVED: HMAC uses same key as AES in v1 (decided in Phase 1 spec, v2 will use HKDF)
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## Session Continuity
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Last session: 2026-02-25
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Stopped at: Completed 06-01-PLAN.md (Rust obfuscation pipeline -- XOR headers, encrypted TOC, decoy padding)
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Resume file: None
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