c67a170919
- SUMMARY.md with 19 unit tests across crypto/compression/format modules - STATE.md updated to Phase 3 Plan 1/2, 43% progress - ROADMAP.md marks 03-01-PLAN.md complete - REQUIREMENTS.md marks TST-03 complete
77 lines
2.8 KiB
Markdown
77 lines
2.8 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 3: Round-Trip Verification
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## Current Position
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Phase: 3 of 6 (Round-Trip Verification)
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Plan: 1 of 2 in current phase
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Status: Plan 03-01 complete, ready for Plan 03-02
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Last activity: 2026-02-24 -- Library crate + 19 unit tests for crypto/compression/format
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Progress: [████░░░░░░] 43%
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 4
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- Average duration: 4 min
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- Total execution time: 0.3 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 | 1/2 | 3 min | 3 min |
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**Recent Trend:**
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- Last 5 plans: 7min, 4min, 2min, 3min
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- Trend: stable/improving
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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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### Pending Todos
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None yet.
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### Blockers/Concerns
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- Open question: Does target busybox have `openssl enc -aes-256-cbc` with `-K`/`-iv` flags? (affects Phase 5)
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- Open question: Is `xxd` available in target busybox? Fallback: `od` (affects Phase 5; spec includes od fallback functions)
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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: 2026-02-24
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Stopped at: Completed 03-01-PLAN.md (Library crate + unit tests)
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Resume file: None
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