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docs(phase-12): complete phase execution

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.planning/STATE.md
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gsd_state_version: 1.0
milestone: v1.0
milestone_name: Directory Support
status: complete
last_updated: "2026-02-26T21:01:33Z"
status: unknown
last_updated: "2026-02-26T21:07:08.371Z"
progress:
total_phases: 12
completed_phases: 12
total_phases: 10
completed_phases: 10
total_plans: 15
completed_plans: 15
---

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.planning/phases/12-user-key-input/12-VERIFICATION.md Normal file
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---
phase: 12-user-key-input
verified: 2026-02-27T00:15:00Z
status: passed
score: 14/14 must-haves verified
---
# Phase 12: User Key Input Verification Report
**Phase Goal:** Replace hardcoded encryption key with user-specified key input: `--password` (interactive prompt or CLI value, derived via Argon2id), `--key` (raw 64-char hex), `--key-file` (read 32 bytes from file). All three methods produce a 32-byte AES-256 key passed through pack/unpack/inspect.
**Verified:** 2026-02-27T00:15:00Z
**Status:** passed
**Re-verification:** No -- initial verification
## Goal Achievement
### Observable Truths
#### Plan 01 Truths
| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | User must provide exactly one of --key, --key-file, or --password to pack/unpack | VERIFIED | `src/cli.rs:5` `#[group(required = false, multiple = false)]` enforces mutual exclusivity; `src/main.rs:27` and `:36` return error "required for pack/unpack" if None; test `test_rejects_missing_key` passes |
| 2 | Running `pack --key <64-char-hex>` produces a valid archive using the hex-decoded 32-byte key | VERIFIED | `src/key.rs:53-65` decode_hex_key(); `src/main.rs:28-29` resolve_key_for_pack -> archive::pack; all `cmd_with_key()` tests pass (test_roundtrip_single_text_file, etc.) |
| 3 | Running `pack --key-file <path>` reads exactly 32 bytes from file and uses them as the AES key | VERIFIED | `src/key.rs:68-80` read_key_file(); test `test_key_file_roundtrip` passes with 32-byte key file |
| 4 | Running `unpack --key <hex>` with the same key used for pack extracts byte-identical files | VERIFIED | test `test_roundtrip_single_text_file`, `test_roundtrip_multiple_files`, and 6 other roundtrip tests all pass |
| 5 | Inspect works without a key argument (reads only metadata, not encrypted content) | VERIFIED | `src/main.rs:58` passes `None` when no key_source; `src/archive.rs:513-515` prints "TOC is encrypted, provide a key to see entry listing"; test `test_inspect_without_key` passes |
| 6 | Invalid hex (wrong length, non-hex chars) produces a clear error message | VERIFIED | `src/key.rs:54-61` validates hex decode and 32-byte length; test `test_rejects_bad_hex` asserts stderr contains "32 bytes" or "hex" |
| 7 | Key file that doesn't exist or has wrong size produces a clear error message | VERIFIED | `src/key.rs:69-76` validates file read and 32-byte length with descriptive error messages |
#### Plan 02 Truths
| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 8 | Running `pack --password mypass` derives a 32-byte key via Argon2id and stores a 16-byte salt in the archive | VERIFIED | `src/key.rs:93-103` resolve_key_for_pack generates salt via rand, calls derive_key_from_password (Argon2id); `src/archive.rs:352-353` sets FLAG_KDF_SALT; `src/archive.rs:456-458` writes salt; test `test_password_roundtrip` passes |
| 9 | Running `unpack --password mypass` reads the salt from the archive, re-derives the same key, and extracts files correctly | VERIFIED | `src/main.rs:37-43` reads salt via read_archive_salt, then calls resolve_key_for_unpack; `src/key.rs:112-119` derive_key_from_password with archive salt; test `test_password_roundtrip` passes with byte-identical output |
| 10 | Running `pack --password` (no value) prompts for password interactively via rpassword | VERIFIED | `src/key.rs:38-49` prompt_password() uses `rpassword::prompt_password()`; `src/key.rs:95-96` calls prompt_password(true) when password_opt is None; CLI uses `Option<Option<String>>` pattern (`src/cli.rs:17`) |
| 11 | Archives created with --password have flags bit 4 (0x10) set and 16-byte salt at offset 40 | VERIFIED | `src/archive.rs:352-353` sets FLAG_KDF_SALT; `src/archive.rs:383-384` toc_offset = HEADER_SIZE + SALT_SIZE (40+16=56); test `test_password_archive_has_salt_flag` asserts "Flags: 0x1F" (0x0F + 0x10) |
| 12 | Archives created with --key or --key-file do NOT have salt (flags bit 4 clear, toc_offset=40) | VERIFIED | `src/archive.rs:385-387` toc_offset = HEADER_SIZE when salt is None; salt parameter is None for hex/file keys; test `test_key_archive_no_salt_flag` asserts "Flags: 0x0F" |
| 13 | Wrong password on unpack causes HMAC verification failure | VERIFIED | Different password -> different Argon2id key -> HMAC mismatch or TOC decryption failure; test `test_password_wrong_rejects` passes |
| 14 | Pack with --password prompts for password confirmation (enter twice) | VERIFIED | `src/key.rs:43-47` when `confirm=true`, prompts "Confirm password:" and checks match; `src/key.rs:96` calls `prompt_password(true)` for pack |
**Score:** 14/14 truths verified
### Required Artifacts
#### Plan 01 Artifacts
| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `src/cli.rs` | CLI arg group for --key, --key-file, --password | VERIFIED | KeyArgs struct with `#[group(required = false, multiple = false)]`, key/key_file/password fields, flattened into Cli |
| `src/key.rs` | Key resolution from hex, file, and password (exports resolve_key, KeySource) | VERIFIED | KeySource enum (line 14), resolve_key (line 128), resolve_key_for_pack (line 83), resolve_key_for_unpack (line 108), decode_hex_key, read_key_file, ResolvedKey |
| `src/archive.rs` | pack/unpack/inspect accept key parameter | VERIFIED | pack: `key: &[u8; 32], salt: Option<&[u8; 16]>` (line 306); unpack: `key: &[u8; 32]` (line 600); inspect: `key: Option<&[u8; 32]>` (line 492) |
| `src/main.rs` | Wiring: CLI -> key resolution -> archive functions | VERIFIED | Lines 10-18 build KeySource from CLI args; lines 26-61 route to pack/unpack/inspect with key |
#### Plan 02 Artifacts
| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `src/key.rs` | Argon2id KDF and rpassword interactive prompt (contains "Argon2") | VERIFIED | Line 28: `use argon2::Argon2;` line 31: `Argon2::default().hash_password_into()`; rpassword at line 39 |
| `src/format.rs` | Salt read/write between header and TOC (contains "read_salt") | VERIFIED | `read_salt` at line 345, `write_salt` at line 356, FLAG_KDF_SALT at line 16, SALT_SIZE at line 13 |
| `src/archive.rs` | Salt generation in pack, salt reading in unpack/inspect | VERIFIED | salt parameter in pack (line 306), read_salt call in read_archive_metadata (line 60), read_archive_salt helper (line 86), FLAG_KDF_SALT usage (line 353) |
### Key Link Verification
#### Plan 01 Key Links
| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `src/main.rs` | `src/key.rs` | resolve_key() call | WIRED | main.rs lines 28,40,42,53,55 call resolve_key_for_pack/resolve_key_for_unpack |
| `src/main.rs` | `src/archive.rs` | passing resolved key to pack/unpack/inspect | WIRED | main.rs lines 29,44,60 pass &resolved.key, &key, key.as_ref() to archive functions |
| `src/cli.rs` | `src/main.rs` | KeySource enum extracted from parsed CLI args | WIRED | main.rs lines 10-18 map cli.key_args fields to KeySource variants |
#### Plan 02 Key Links
| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `src/key.rs` | argon2 crate | Argon2::default().hash_password_into() | WIRED | key.rs line 31 calls hash_password_into |
| `src/archive.rs` | `src/format.rs` | write_salt/read_salt for password-derived archives | WIRED | archive.rs line 60 calls format::read_salt, line 457 calls format::write_salt |
| `src/archive.rs` | `src/key.rs` | derive_key_from_password call when salt present | WIRED | Not called directly from archive.rs (correct design -- called from main.rs via resolve_key_for_unpack which calls derive_key_from_password in key.rs:119). The link is conceptually correct: archive reads salt, main passes salt to key resolution. |
### Requirements Coverage
| Requirement | Source Plan | Description | Status | Evidence |
|-------------|------------|-------------|--------|----------|
| KEY-01 | 12-01 | CLI `--key <HEX>` -- 64 hex chars decoded to 32-byte AES-256 key | SATISFIED | cli.rs key field, key.rs decode_hex_key(), test_roundtrip_single_text_file et al. |
| KEY-02 | 12-01 | CLI `--key-file <PATH>` -- read exactly 32 bytes from file as raw key | SATISFIED | cli.rs key_file field, key.rs read_key_file(), test_key_file_roundtrip |
| KEY-03 | 12-02 | CLI `--password [VALUE]` -- interactive prompt (rpassword) or value from CLI | SATISFIED | cli.rs password: Option<Option<String>>, key.rs prompt_password(), test_password_roundtrip |
| KEY-04 | 12-02 | Argon2id KDF -- derive 32-byte key from password + 16-byte random salt | SATISFIED | key.rs derive_key_from_password() using argon2::Argon2::default(), test_password_roundtrip |
| KEY-05 | 12-02 | Salt storage -- flags bit 4 (0x10), 16-byte salt between header and TOC at pack | SATISFIED | format.rs FLAG_KDF_SALT/SALT_SIZE/write_salt, archive.rs lines 352-353/456-458, test_password_archive_has_salt_flag |
| KEY-06 | 12-02 | Salt reading from archive at unpack/inspect -- auto-detect by flags bit 4 | SATISFIED | format.rs read_salt(), archive.rs read_archive_salt(), main.rs lines 39-40 for unpack, 52-53 for inspect |
| KEY-07 | 12-01 | One of --key/--key-file/--password required for pack/unpack; inspect accepts key optionally | SATISFIED | main.rs lines 26-27/35-36 error on None for pack/unpack; lines 49-60 allow None for inspect; test_inspect_without_key/test_rejects_missing_key |
All 7 requirements are covered. No orphaned requirements found.
### Anti-Patterns Found
| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| `src/archive.rs` | 366 | `data_offset: 0, // placeholder` | Info | Legitimate two-pass algorithm: offset is recomputed at line 408-415 in the same function. Not a stub. |
No blockers or warnings.
### Human Verification Required
### 1. Interactive Password Prompt
**Test:** Run `cargo run -- --password pack some_file -o test.aea` (no value after --password)
**Expected:** Terminal prompts "Password: " (hidden input), then "Confirm password: " (hidden input), then packs successfully
**Why human:** Cannot test interactive terminal input via assert_cmd in automated tests; rpassword reads from /dev/tty
### 2. Password Mismatch Rejection
**Test:** Run `cargo run -- --password pack some_file -o test.aea`, enter "abc" for password, "def" for confirmation
**Expected:** Error "Passwords do not match"
**Why human:** Requires interactive terminal input
### Gaps Summary
No gaps found. All 14 observable truths verified. All 7 requirements satisfied. All key links wired. All artifacts substantive and connected. All 52 tests pass (25 unit + 7 golden + 20 integration). No blocking anti-patterns detected.
The only items requiring human verification are the interactive password prompt flows (entering password via terminal), which cannot be tested via automated CLI tests. The non-interactive `--password VALUE` path is fully tested.
---
_Verified: 2026-02-27T00:15:00Z_
_Verifier: Claude (gsd-verifier)_