11 KiB
11 KiB
phase, verified, status, score, re_verification
| phase | verified | status | score | re_verification |
|---|---|---|---|---|
| 02-core-archiver | 2026-02-25T10:30:00Z | passed | 9/9 must-haves verified | false |
Phase 2: Core Archiver Verification Report
Phase Goal: A working Rust CLI that takes input files and produces a valid encrypted archive Verified: 2026-02-25T10:30:00Z Status: passed Re-verification: No -- initial verification
Goal Achievement
Observable Truths
Truths derived from Phase 2 Success Criteria (ROADMAP.md) and PLAN must_haves:
| # | Truth | Status | Evidence |
|---|---|---|---|
| 1 | Running encrypted_archive pack file1.txt file2.apk -o archive.bin produces a single binary file |
VERIFIED | Functional test: packed 2 files into 373-byte archive. Output file created at specified path. |
| 2 | The output file is not recognized by standard tools (custom magic bytes, no standard signatures) | VERIFIED | Magic bytes confirmed: 0x00 0xEA 0x72 0x63 at offset 0. file command not available but hex dump shows no standard signature. Leading 0x00 byte prevents MIME detection. No gzip/zip/tar signatures in output. |
| 3 | Each file in the archive is independently compressed (gzip) and encrypted (AES-256-CBC) with a unique random IV | VERIFIED | Two copies of same file packed: IVs differ (2a1d5ca5... vs 2c8bc10a...). generate_iv() uses CSPRNG via rand::rng(). Each file processed independently in pack() loop. |
| 4 | HMAC-SHA256 is computed over IV+ciphertext for each file (encrypt-then-MAC) | VERIFIED | compute_hmac() calls mac.update(iv) then mac.update(ciphertext) -- exactly IV||ciphertext. verify_hmac() uses constant-time verify_slice(). Tamper test: flipping one ciphertext byte triggers "HMAC verification failed", file skipped, non-zero exit. |
| 5 | Running encrypted_archive inspect archive.bin shows file count, names, and sizes without decrypting content |
VERIFIED | Functional test output shows: Archive name, Version, Flags, Files count, TOC offset/size, and per-file: name, original/compressed/encrypted sizes, offset, compression flag, IV, HMAC, SHA-256 -- all without decryption. |
| 6 | cargo build compiles the project with zero errors | VERIFIED | Build succeeds with only 2 dead-code warnings for entry_size and compute_toc_size helper functions (acceptable, usable by future code). |
| 7 | All binary format types (Header, TocEntry) match FORMAT.md byte-for-byte field definitions | VERIFIED | Manual review: write_header() writes 40 bytes in exact FORMAT.md Section 4 order. write_toc_entry() writes (101+N) bytes in exact Section 5 order. read_header() parses at correct offsets [0..4]=magic, [4]=version, [5]=flags, [6..8]=file_count LE, [8..12]=toc_offset LE, [12..16]=toc_size LE, [16..32]=toc_iv, [32..40]=reserved. All multi-byte fields use to_le_bytes()/from_le_bytes(). |
| 8 | Round-trip fidelity: packed files are byte-identical after unpacking | VERIFIED | diff of text file and binary file both passed after pack-then-unpack cycle. SHA-256 verified during unpack. |
| 9 | Already-compressed files (APK) are stored without gzip compression | VERIFIED | APK file packed with compression_flag=0, flags=0x00. should_compress() returns false for .apk extension. Inspect confirms Compression: no and compressed_size == original_size. |
Score: 9/9 truths verified
Required Artifacts
| Artifact | Expected | Status | Details |
|---|---|---|---|
Cargo.toml |
Project manifest with all dependencies | VERIFIED | Contains aes 0.8, cbc 0.1, hmac 0.12, sha2 0.10, flate2 1.1, clap 4.5 (derive), rand 0.9, anyhow 1.0. Edition 2021. |
src/main.rs |
CLI entry point with clap dispatch | VERIFIED | 34 lines. Parses CLI with Cli::parse(), dispatches to archive::pack/unpack/inspect. All 6 modules declared. |
src/cli.rs |
Clap derive structs for Pack/Unpack/Inspect | VERIFIED | Exports Cli, Commands. Pack has files (required), output, no_compress. Unpack has archive, output_dir (default "."). Inspect has archive. |
src/key.rs |
Hardcoded 32-byte encryption key | VERIFIED | Exports KEY: [u8; 32] with non-trivial values. |
src/format.rs |
Header and TocEntry structs with serialize/deserialize | VERIFIED | 212 lines. Exports Header, TocEntry, MAGIC, VERSION, HEADER_SIZE, write_header, write_toc_entry, read_header, read_toc_entry, read_toc, entry_size, compute_toc_size. |
src/crypto.rs |
AES-256-CBC encrypt/decrypt, HMAC-SHA-256, SHA-256 | VERIFIED | 78 lines. Exports encrypt_data, decrypt_data, compute_hmac, verify_hmac, sha256_hash, generate_iv. Uses correct type aliases: cbc::Encryptor<aes::Aes256>, cbc::Decryptor<aes::Aes256>. |
src/compression.rs |
Gzip compress/decompress and should_compress heuristic | VERIFIED | 51 lines. Exports compress, decompress, should_compress. Uses GzBuilder::new().mtime(0) for reproducibility. 18 known compressed extensions checked. |
src/archive.rs |
pack(), unpack(), inspect() orchestration (min 150 lines) | VERIFIED | 328 lines (exceeds 150 minimum). Two-pass pack algorithm, HMAC-first unpack, metadata inspect. Directory traversal protection. |
Key Link Verification
| From | To | Via | Status | Details |
|---|---|---|---|---|
src/archive.rs |
src/key.rs |
use crate::key::KEY |
WIRED | Line 8: use crate::key::KEY; Used in pack (lines 72, 76) and unpack (lines 265, 272). |
src/archive.rs |
src/format.rs |
writes header and TOC entries | WIRED | format::write_header (L128), format::write_toc_entry (L144), format::read_header (L170, L236), format::read_toc (L173, L239). |
src/archive.rs |
src/crypto.rs |
encrypts/decrypts and computes/verifies HMAC | WIRED | crypto::encrypt_data (L72), crypto::compute_hmac (L76), crypto::sha256_hash (L54, L296), crypto::verify_hmac (L265), crypto::decrypt_data (L272), crypto::generate_iv (L69). |
src/archive.rs |
src/compression.rs |
compresses/decompresses based on should_compress | WIRED | compression::should_compress (L57), compression::compress (L59), compression::decompress (L283). |
src/main.rs |
src/archive.rs |
dispatches CLI commands | WIRED | archive::pack (L20), archive::unpack (L26), archive::inspect (L29). |
src/main.rs |
src/cli.rs |
clap parse and dispatch | WIRED | Cli::parse() (L12), match on Commands variants (L14-31). |
src/format.rs |
docs/FORMAT.md |
byte-for-byte field layout match | WIRED | Magic bytes [0x00, 0xEA, 0x72, 0x63] match. Header 40 bytes with identical field order. TocEntry (101+N) bytes with identical field order. All LE integers confirmed. |
Requirements Coverage
| Requirement | Source Plan | Description | Status | Evidence |
|---|---|---|---|---|
| FMT-01 | 02-01 | Custom binary format with non-standard magic bytes | SATISFIED | Magic 0x00 0xEA 0x72 0x63 not recognized by standard tools. |
| FMT-02 | 02-01 | Version field (1 byte) for forward compatibility | SATISFIED | Header version field at offset 0x04, validated during read. |
| FMT-03 | 02-01 | File table with metadata: name, sizes, offset, IV, HMAC | SATISFIED | TocEntry has all fields: name, original_size, compressed_size, encrypted_size, data_offset, iv, hmac, sha256, compression_flag, padding_after. |
| FMT-04 | 02-01 | Little-endian for all multi-byte fields | SATISFIED | All to_le_bytes()/from_le_bytes() usage confirmed in format.rs. No to_be_bytes() or to_ne_bytes() used. |
| ENC-01 | 02-01 | AES-256-CBC encryption per file | SATISFIED | cbc::Encryptor<aes::Aes256> used. Each file encrypted independently with unique IV. |
| ENC-02 | 02-01 | HMAC-SHA256 encrypt-then-MAC per file | SATISFIED | HMAC computed over IV||ciphertext. Verified before decryption in unpack. |
| ENC-03 | 02-01 | Random 16-byte IV per file, stored in cleartext | SATISFIED | generate_iv() produces 16 random bytes via CSPRNG. Stored in TocEntry.iv. |
| ENC-04 | 02-01 | Hardcoded 32-byte key | SATISFIED | key.rs exports KEY: [u8; 32] constant. Used by both pack and unpack. |
| ENC-05 | 02-01 | PKCS7 padding for AES-CBC | SATISFIED | encrypt_padded_mut::<Pkcs7> and decrypt_padded_mut::<Pkcs7> used. |
| CMP-01 | 02-01 | Gzip compression per file before encryption | SATISFIED | compression::compress() uses GzBuilder/GzEncoder. Applied before encryption in pack pipeline. |
| CMP-02 | 02-01 | Per-file compression flag, skip for already-compressed files | SATISFIED | should_compress() checks 18 extensions. compression_flag stored per TocEntry. APK test confirmed compression=no. |
| INT-01 | 02-01 | SHA-256 checksum per file, verified after decompression | SATISFIED | crypto::sha256_hash() computed on original data. Verified in unpack after decompress (L296-304). |
| CLI-01 | 02-01 | Rust CLI for creating archives | SATISFIED | encrypted_archive binary with clap-based CLI. Builds and runs on Linux. |
| CLI-02 | 02-02 | Pack multiple files (text + APK) into one archive | SATISFIED | Functional test: packed text + binary into single archive. APK detection works. |
| CLI-03 | 02-02 | Subcommands: pack, unpack, inspect | SATISFIED | All three subcommands implemented and wired. Functional tests pass for all three. |
No orphaned requirements found -- all 15 requirement IDs from ROADMAP.md Phase 2 are covered by plans 02-01 and 02-02.
Anti-Patterns Found
| File | Line | Pattern | Severity | Impact |
|---|---|---|---|---|
src/format.rs |
204, 209 | Dead code: entry_size, compute_toc_size unused |
Info | Helper functions available for future use; generates compiler warnings but does not affect functionality. |
No TODOs, FIXMEs, placeholders, stubs, or empty implementations found in any source file.
Human Verification Required
1. File command / binwalk unrecognizability
Test: Run file archive.bin and binwalk archive.bin on a system where these tools are installed.
Expected: file should report "data" (unknown binary). binwalk should find no known signatures.
Why human: Neither file nor binwalk is installed in the verification environment.
2. Visual inspect output formatting
Test: Run encrypted_archive inspect archive.bin on a real archive and review output formatting.
Expected: Clean, readable tabular output with hex-encoded IVs/HMACs/SHA-256, correct alignment.
Why human: Formatting quality is a subjective assessment.
3. Large file behavior
Test: Pack a file >10MB and verify round-trip. Expected: Pack and unpack succeed with identical output. Why human: Timeout constraints prevent running large file tests in verification.
Gaps Summary
No gaps found. All 9 observable truths verified. All 8 artifacts exist, are substantive, and are correctly wired. All 7 key links verified as connected. All 15 requirements satisfied. No blocker or warning anti-patterns detected.
The two dead-code warnings for entry_size and compute_toc_size are informational only -- these are utility functions that will likely be used in future phases (tests, other tooling).
Verified: 2026-02-25T10:30:00Z Verifier: Claude (gsd-verifier)