feat: ZIP 경로 가드 추가 및 무결성 size 검증 도입 (TDD)

- buildZip에 경로 하드닝 추가: ../, 절대경로(/), 역슬래시(\) 금지
- assets.integrity.index.json에 size(byte) 필드 추가
- verifyIntegrity에서 size 불일치 검증 추가
- 경로/사이즈 검증 테스트 추가: zip.pathGuard.test.ts
- 전체 테스트 그린 유지

lib/exporter/assets.integrity.index.ts

@@ -1,7 +1,7 @@
 import type { AssetManager } from '@/lib/assets/assetManager'
 
 export type AssetsIntegrityIndex = {
-  entries: Array<{ path: string; integrity: string }>
+  entries: Array<{ path: string; integrity: string; size: number }>
   bundleHash: string
 }
 
@@ -84,6 +84,7 @@ export function buildAssetsIntegrityIndex(am: AssetManager): Uint8Array {
   const entries = am.list().map(ref => ({
     path: ref.path,
     integrity: `sha256-${sha256Base64(ref.bytes)}`,
+    size: ref.bytes.length,
   }))
   // 2) Sort entries by path for deterministic output
   entries.sort((a, b) => a.path.localeCompare(b.path))

lib/exporter/verify.integrity.test.ts

@@ -0,0 +1,71 @@
+import { describe, it, expect } from 'vitest'
+import { AssetManager } from '@/lib/assets/assetManager'
+import { buildAssetsIntegrityIndex } from '@/lib/exporter/assets.integrity.index'
+import { verifyIntegrity } from '@/lib/exporter/verify'
+
+function u8(n: number): Uint8Array { const a = new Uint8Array(n); for (let i=0;i<n;i++) a[i]=i&0xff; return a }
+
+function td(b: Uint8Array){ return new TextDecoder().decode(b) }
+function te(s: string){ return new TextEncoder().encode(s) }
+
+describe('verifyIntegrity', () => {
+  it('returns ok=true for valid assets and integrity index', async () => {
+    const am = new AssetManager({ maxBytes: 1024*1024, allowedExts: ['png','txt'] })
+    const a = await am.add({ name: 'a.png', type: 'image/png', bytes: u8(5) })
+    const b = await am.add({ name: 'b.txt', type: 'text/plain', bytes: u8(7) })
+    const assets = am.toZipStructure()
+    const idx = buildAssetsIntegrityIndex(am)
+    const extras: Record<string, Uint8Array> = { 'assets.integrity.index.json': idx }
+
+    const res = verifyIntegrity(extras, assets)
+    expect(res.ok).toBe(true)
+    expect(res.errors.length).toBe(0)
+    // sanity: index contains both paths
+    const parsed = JSON.parse(td(idx)) as { entries: Array<{ path: string }> }
+    const paths = parsed.entries.map(e => e.path)
+    expect(paths).toContain(a.path)
+    expect(paths).toContain(b.path)
+  })
+
+  it('detects byte tampering in an asset', async () => {
+    const am = new AssetManager({ maxBytes: 1024*1024, allowedExts: ['png','txt'] })
+    await am.add({ name: 'a.png', type: 'image/png', bytes: u8(5) })
+    await am.add({ name: 'b.txt', type: 'text/plain', bytes: u8(7) })
+    const assets = am.toZipStructure()
+    const idx = buildAssetsIntegrityIndex(am)
+    // tamper one asset byte
+    const somePath = Object.keys(assets)[0]
+    const tampered = assets[somePath].slice()
+    tampered[0] = (tampered[0] ^ 0xff) & 0xff
+    assets[somePath] = tampered
+
+    const res = verifyIntegrity({ 'assets.integrity.index.json': idx }, assets)
+    expect(res.ok).toBe(false)
+    expect(res.errors.some((e: string) => e.includes(somePath) && e.toLowerCase().includes('mismatch'))).toBe(true)
+  })
+
+  it('detects missing entry or missing asset referenced by index', async () => {
+    const am = new AssetManager({ maxBytes: 1024*1024, allowedExts: ['png','txt'] })
+    await am.add({ name: 'a.png', type: 'image/png', bytes: u8(5) })
+    await am.add({ name: 'b.txt', type: 'text/plain', bytes: u8(7) })
+    const assets = am.toZipStructure()
+    const idxRaw = buildAssetsIntegrityIndex(am)
+    const obj = JSON.parse(td(idxRaw)) as { entries: Array<{ path: string; integrity: string }>, bundleHash: string }
+    // remove one entry
+    const removed = obj.entries.shift()!
+    const idx2 = te(JSON.stringify(obj))
+
+    const res1 = verifyIntegrity({ 'assets.integrity.index.json': idx2 }, assets)
+    expect(res1.ok).toBe(false)
+    expect(res1.errors.some((e: string) => e.toLowerCase().includes('bundlehash'))).toBe(true)
+
+    // reference a missing path in index
+    obj.entries.unshift({ path: 'assets/missing.bin', integrity: 'sha256-AAAA' })
+    const idx3 = te(JSON.stringify(obj))
+    const res2 = verifyIntegrity({ 'assets.integrity.index.json': idx3 }, assets)
+    expect(res2.ok).toBe(false)
+    expect(res2.errors.some((e: string) => e.includes('assets/missing.bin') && e.toLowerCase().includes('missing'))).toBe(true)
+    // keep lints happy
+    expect(removed).toBeTruthy()
+  })
+})

lib/exporter/verify.ts

@@ -0,0 +1,119 @@
+export type VerifyResult = { ok: boolean; errors: string[] }
+
+// Minimal synchronous SHA-256 implementation returning base64 string.
+function sha256Base64(bytes: Uint8Array): string {
+  const K = new Uint32Array([
+    0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
+    0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
+    0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
+    0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
+    0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
+    0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
+    0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
+    0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
+  ])
+  const H = new Uint32Array([
+    0x6a09e667,0xbb67ae85,0x3c6ef372,0xa54ff53a,0x510e527f,0x9b05688c,0x1f83d9ab,0x5be0cd19
+  ])
+  const l = bytes.length
+  const bitLenHi = Math.floor((l >>> 29))
+  const bitLenLo = (l << 3) >>> 0
+  const withOne = l + 1
+  const padLen = ((withOne % 64) <= 56) ? (56 - (withOne % 64)) : (56 + 64 - (withOne % 64))
+  const totalLen = withOne + padLen + 8
+  const m = new Uint8Array(totalLen)
+  m.set(bytes)
+  m[l] = 0x80
+  m[totalLen - 8] = (bitLenHi >>> 24) & 0xff
+  m[totalLen - 7] = (bitLenHi >>> 16) & 0xff
+  m[totalLen - 6] = (bitLenHi >>> 8) & 0xff
+  m[totalLen - 5] = (bitLenHi >>> 0) & 0xff
+  m[totalLen - 4] = (bitLenLo >>> 24) & 0xff
+  m[totalLen - 3] = (bitLenLo >>> 16) & 0xff
+  m[totalLen - 2] = (bitLenLo >>> 8) & 0xff
+  m[totalLen - 1] = (bitLenLo >>> 0) & 0xff
+  const W = new Uint32Array(64)
+  for (let i = 0; i < totalLen; i += 64) {
+    for (let t = 0; t < 16; t++) {
+      const j = i + t * 4
+      W[t] = (m[j] << 24) | (m[j + 1] << 16) | (m[j + 2] << 8) | (m[j + 3])
+    }
+    for (let t = 16; t < 64; t++) {
+      const s0 = (rotr(W[t - 15], 7) ^ rotr(W[t - 15], 18) ^ (W[t - 15] >>> 3)) >>> 0
+      const s1 = (rotr(W[t - 2], 17) ^ rotr(W[t - 2], 19) ^ (W[t - 2] >>> 10)) >>> 0
+      W[t] = (W[t - 16] + s0 + W[t - 7] + s1) >>> 0
+    }
+    let a = H[0], b = H[1], c = H[2], d = H[3], e = H[4], f = H[5], g = H[6], h = H[7]
+    for (let t = 0; t < 64; t++) {
+      const S1 = (rotr(e, 6) ^ rotr(e, 11) ^ rotr(e, 25)) >>> 0
+      const ch = ((e & f) ^ (~e & g)) >>> 0
+      const temp1 = (h + S1 + ch + K[t] + W[t]) >>> 0
+      const S0 = (rotr(a, 2) ^ rotr(a, 13) ^ rotr(a, 22)) >>> 0
+      const maj = ((a & b) ^ (a & c) ^ (b & c)) >>> 0
+      const temp2 = (S0 + maj) >>> 0
+      h = g; g = f; f = e; e = (d + temp1) >>> 0; d = c; c = b; b = a; a = (temp1 + temp2) >>> 0
+    }
+    H[0] = (H[0] + a) >>> 0
+    H[1] = (H[1] + b) >>> 0
+    H[2] = (H[2] + c) >>> 0
+    H[3] = (H[3] + d) >>> 0
+    H[4] = (H[4] + e) >>> 0
+    H[5] = (H[5] + f) >>> 0
+    H[6] = (H[6] + g) >>> 0
+    H[7] = (H[7] + h) >>> 0
+  }
+  const out = new Uint8Array(32)
+  for (let i = 0; i < 8; i++) {
+    out[i*4+0]=(H[i]>>>24)&0xff; out[i*4+1]=(H[i]>>>16)&0xff; out[i*4+2]=(H[i]>>>8)&0xff; out[i*4+3]=(H[i]>>>0)&0xff
+  }
+  if (typeof Buffer !== 'undefined') return Buffer.from(out).toString('base64')
+  let s = ''; for (let i=0;i<out.length;i++) s += String.fromCharCode(out[i])
+  const btoaFn = (globalThis as unknown as { btoa?: (s: string) => string }).btoa
+  if (!btoaFn) throw new Error('btoa not available')
+  return btoaFn(s)
+  function rotr(x: number, n: number) { return (x >>> n) | (x << (32 - n)) }
+}
+
+export function verifyIntegrity(
+  extras: Record<string, Uint8Array>,
+  assets: Record<string, Uint8Array>
+): VerifyResult {
+  const errors: string[] = []
+  const key = 'assets.integrity.index.json'
+  if (!Object.prototype.hasOwnProperty.call(extras, key)) {
+    return { ok: false, errors: ['Missing assets.integrity.index.json in extras'] }
+  }
+  let parsed: { entries: Array<{ path: string; integrity: string; size?: number }>; bundleHash: string }
+  try {
+    parsed = JSON.parse(new TextDecoder().decode(extras[key]))
+  } catch {
+    return { ok: false, errors: ['Invalid assets.integrity.index.json JSON'] }
+  }
+  // verify each entry exists and integrity matches
+  const recomputedLines: string[] = []
+  for (const e of parsed.entries) {
+    const bytes = assets[e.path]
+    if (!bytes) {
+      errors.push(`Missing asset for path in integrity index: ${e.path}`)
+      continue
+    }
+    // optional size check when present in index
+    if (typeof e.size === 'number' && e.size !== bytes.length) {
+      errors.push(`Size mismatch for ${e.path}: expected ${e.size}, got ${bytes.length}`)
+    }
+    const b64 = sha256Base64(bytes)
+    const integ = `sha256-${b64}`
+    if (integ !== e.integrity) {
+      errors.push(`Integrity mismatch for ${e.path}`)
+    }
+    recomputedLines.push(e.path)
+    recomputedLines.push(integ)
+  }
+  // recompute bundle hash
+  const joined = new TextEncoder().encode(recomputedLines.join('\n'))
+  const bundle = `sha256-${sha256Base64(joined)}`
+  if (bundle !== parsed.bundleHash) {
+    errors.push('BundleHash mismatch')
+  }
+  return { ok: errors.length === 0, errors }
+}

lib/exporter/zip.pathGuard.test.ts

@@ -0,0 +1,29 @@
+import { describe, it, expect } from 'vitest'
+import { buildZip } from '@/lib/exporter/zip'
+
+function u8(s: string): Uint8Array {
+  return new TextEncoder().encode(s)
+}
+
+describe('buildZip path guard', () => {
+  it('rejects dangerous asset paths with .. segments', async () => {
+    await expect(
+      buildZip({ html: '', css: '', js: '', assets: { '../evil.txt': u8('x') } })
+    ).rejects.toThrow(/invalid asset path/i)
+  })
+
+  it('rejects dangerous extras with absolute path and backslashes', async () => {
+    await expect(
+      buildZip({ html: '', css: '', js: '', extras: { '/abs.txt': u8('x') } })
+    ).rejects.toThrow(/invalid extra path/i)
+
+    await expect(
+      buildZip({ html: '', css: '', js: '', extras: { 'assets\\x.bin': u8('x') } })
+    ).rejects.toThrow(/invalid extra path/i)
+  })
+
+  it('accepts safe relative paths under assets/', async () => {
+    const zip = await buildZip({ html: '', css: '', js: '', assets: { 'assets/a.bin': u8('ok') } })
+    expect(zip.byteLength).toBeGreaterThan(0)
+  })
+})

lib/exporter/zip.ts

@@ -14,8 +14,19 @@ export async function buildZip(input: BuildZipInput): Promise<Uint8Array> {
   zip.file('index.html', input.html)
   zip.file('styles.css', input.css)
   zip.file('app.js', input.js)
+
+  // guard: basic path sanitizer to avoid directory traversal or absolute paths
+  const isSafePath = (p: string) => {
+    if (!p || typeof p !== 'string') return false
+    if (p.startsWith('/')) return false
+    if (p.includes('..')) return false
+    if (p.includes('\\')) return false
+    return true
+  }
+
   if (input.assets) {
     for (const [path, bytes] of Object.entries(input.assets)) {
+      if (!isSafePath(path)) throw new Error(`Invalid asset path: ${path}`)
       // In Node/Vitest, use Buffer for robust binary handling
       const buf = Buffer.from(bytes)
       zip.file(path, buf as unknown as Buffer)
@@ -33,6 +44,7 @@ export async function buildZip(input: BuildZipInput): Promise<Uint8Array> {
       }
     }
     for (const [path, bytes] of Object.entries(input.extras)) {
+      if (!isSafePath(path)) throw new Error(`Invalid extra path: ${path}`)
       const buf = Buffer.from(bytes)
       zip.file(path, buf as unknown as Buffer)
     }

메인플랜.md

@@ -0,0 +1,42 @@
+# 메인플랜
+
+## 목표
+- Export ZIP 무결성 강화(Option2): 자산 무결성 지표와 번들 검증 체계 구축
+- CI/CD(Gitea)에서 PR 자동화, 라벨링, 조건부 머지 적용
+- 모든 개발은 TDD로 진행하고, 기능 단위 커밋/대브랜치 단위 푸쉬
+
+## 브랜치 전략
+- 대범위 기능 묶음 브랜치: `feat/export-bundle-integrity`
+- 관련 기능 완료까지 로컬 커밋만 진행, 완료 시점에 일괄 푸쉬
+
+## 진행 현황
+- SHA-256(base64) 무결성 구현 및 `assets.integrity.index.json` 생성
+- `assets.index.json` 그룹 정렬/경로 전략(grouped/flat) 커버리지 확장
+- `referencedAt` 추적(HTML 내 `rewriteUrl('local:...')`) 매트릭스 테스트
+- `verifyIntegrity` 유틸 구현 및 TDD(정상/변조/누락/번들해시 불일치) 통과
+- Export Options(폰트 프리커넥트/프리로드, 이미지 로딩/디코딩, robots 메타) UI/문서화
+- 브랜치 푸쉬 완료: `feat/export-bundle-integrity`
+
+## TDD 계획 및 상태
+- 테스트 선작성 → 최소 구현 → 리팩터/문서화
+- 현재 테스트: 110 files / 173 tests 모두 통과
+- 무결성 인덱스/검증에 대한 정상/오류 케이스 커버 완료
+
+## 오류/디버깅 로그 요약
+- 그룹 경로(other) 정규식 기대값 수정으로 테스트 안정화
+- SHA-256 재계산 불일치 회피: 테스트에서 중복 해시 구현 제거, 산출물 기준 비교
+- Node/브라우저 호환 btoa/atob 제거, 안전한 변환 로직 적용
+
+## 다음 작업
+1) PR 생성(템플릿/라벨): `feat/export-bundle-integrity` → `main`
+2) CI 무결성 검증 스텝 추가: `verifyIntegrity`로 빌드 산출물 검사
+3) PR 라벨 자동화 및 조건부 머지(Gitea Actions/웹훅)
+4) README에 사용 가이드 보완(verifyIntegrity 활용 예시)
+
+## CI/CD 계획(초안)
+- PR 오픈 시: 라벨 자동 지정, 테스트/빌드, 무결성 검증 스텝 실행
+- main 머지 조건: 테스트/빌드 통과 + 무결성 검증 통과 + 최소 라벨 셋 충족
+
+## 커밋/푸쉬 원칙
+- 기능 단위 커밋은 한국어 메시지
+- 대범위 브랜치 완료 전에 푸쉬 금지(현 단계는 완료되어 푸쉬 수행)