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fix(security): enforce bounded artifact-token parsing - #274

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fix(security): enforce bounded artifact-token parsing#274
seonghobae wants to merge 8 commits into
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bolt/artifact-token-parsing-optimization-849096064653549957

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@seonghobae

@seonghobae seonghobae commented Aug 5, 2026

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Scope

Replace regex-backed artifact-token splitting with a bounded ten-field parser, verify the HMAC before decoding claims, and reject malformed signed payload structure before authorization or ledger lookup. This PR intentionally makes no allocation or throughput claim without reproducible benchmark evidence.

Test-first security correction

CodeRabbit correctly identified missing signed malformed-payload regressions. Test-first commit 892ba8274e7dc9fdafa1cf2e82a2ba36499dd9bf added deterministic coverage for nine and eleven payload fields, an empty required field, malformed Base64URL, nonnumeric and out-of-range epoch seconds, and a malformed UUID. CI run 31051666714 failed RED because an empty token-id segment returned 403 FORBIDDEN after ledger lookup rather than 401 UNAUTHORIZED as malformed authentication evidence.

Production commit ce93485cf9ce859e594303774b6e87278ef9bcca rejects every empty payload segment during structural parsing, before decoded claims can reach authorization state.

Bot commits subsequently removed the dedicated boundary-regression class twice while changing parser implementation details. Exact current head 96c624297174b5cb0e39f6dadbad05ca6091d81a restores the eight deterministic signed malformed-payload regressions after the latest removal at d01eb10e6d66fc0a1d23589618060e5832f366fa. Existing ArtifactLinkServiceTest coverage already exercises delimiter-free input and signature mismatch, so those duplicate paths are not repeated in the boundary class.

Exact-head evidence

Exact current head: 96c624297174b5cb0e39f6dadbad05ca6091d81a.

  • CI run 31058784201: success.
    • Maven test job 92481970070: success.
    • Buyer-readiness script-test job 92481970143: success.
  • Security Scan run 31058784263: success.
  • SAST Semgrep run 31058784481: success.
  • Fuzz run 31058784233: success.
  • Exact-head CodeRabbit and OpenCode/Noema/Strix review evidence: requested and not yet present; absent review is not passing.
  • Unresolved inline review threads: 0 at the latest inspection.
  • Counted independent write-authorized approval: absent.

The predecessor head d01eb10e6d66fc0a1d23589618060e5832f366fa also passed technical checks, but its evidence is not used for the current head. The branch-local CI still uses the predecessor mvn test contract; it does not replace parent #270's stronger mvn verify, complete Surefire/Failsafe report, zero-missed JaCoCo, and warning-free Javadoc gates.

Stack and acceptance requirements

Keep this PR draft. Authoritative parent #270 must integrate first because this branch is based on protected main and remains behind the parent. Rebuild this bounded parser slice on the resulting protected main, preserving the parent privacy, Netty, SBOM, attribution, exact-head, zero-coverage-miss, warning-free Javadoc, and fail-closed Maven report-evidence contracts.

Before merge, require:

  • exact-current-head Maven verify, zero missed production lines and branches, warning-free public Javadocs, CI, Security Scan, SAST, and every required fuzz job after stack reconciliation;
  • formal CodeRabbit and OpenCode/Noema/Strix review evidence on the exact reconciled head;
  • zero unresolved actionable threads;
  • a counted approval from an independent reviewer with repository write permission;
  • authoritative documentation and CHANGELOG.md reconciliation without duplicating existing Unreleased sections;
  • expected-head-safe merge with every branch-protection and repository-policy rule satisfied.

Queued, pending, cancelled, skipped-required, stale-head, predecessor-head, local-only, or synthetic-only evidence is not passing. Do not bypass protections, weaken tests, or publish a release from this draft.

- String.split 및 String.join을 제거하고 indexOf/lastIndexOf를 사용한 수동 파싱으로 교체
- 필드 추출 전 HMAC 서명을 먼저 검증하여 유효하지 않은 토큰에 대한 불필요한 객체 할당 방지
- 배열 할당 및 정규식 오버헤드 감소
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📝 Walkthrough

Walkthrough

parseAndVerify가 수동 토큰 파싱을 사용하도록 변경되었습니다. HMAC 서명을 먼저 검증한 뒤 구분자 구조와 정확히 10개의 필드를 확인합니다. 잘못된 형식은 인증 오류로 처리합니다. 토큰 경계 조건 테스트를 추가했습니다.

Changes

Artifact 토큰 검증

Layer / File(s) Summary
토큰 파싱 및 서명 검증
src/main/java/com/clearfolio/viewer/artifact/ArtifactLinkService.java
String.splitString.joinindexOf, lastIndexOf, 부분 문자열 추출로 대체했습니다. Payload와 서명을 분리한 뒤 HMAC 서명을 먼저 검증합니다. 구분자 위치와 10개 필드 구조를 확인합니다.
토큰 파서 경계 테스트
src/test/java/com/clearfolio/viewer/artifact/ArtifactTokenManualParserBoundaryTest.java
필드 수 부족·초과, 필수 필드 공백, 잘못된 Base64URL, 비수치·범위 초과 epoch, 잘못된 UUID, 지원되지 않는 버전을 검증합니다. 각 경우에 HttpStatus.UNAUTHORIZED 응답을 확인합니다. 테스트 토큰 생성과 고정된 테스트 환경을 구성합니다.

Estimated code review effort: 3 (Moderate) | ~20 minutes

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🧹 Nitpick comments (1)
src/main/java/com/clearfolio/viewer/artifact/ArtifactLinkService.java (1)

353-370: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

수동 파서의 경계값 회귀 테스트를 추가하세요.

ArtifactLinkServiceTest에서 올바른 HMAC을 가진 9개 및 11개 payload 필드와 빈 필드를 테스트하세요. 잘못된 Base64URL, 비수치 또는 범위를 벗어난 epoch-second, 잘못된 UUID의 기대 결과도 명시하세요. ArtifactTokenParserFuzzTest는 항상 10개 필드를 유효한 Base64URL로 인코딩하므로 이 경로를 모두 대체하지 않습니다. JaCoCo line/branch 100% 결과와 Jazzer 대상을 CI에서 계속 확인하세요.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@src/main/java/com/clearfolio/viewer/artifact/ArtifactLinkService.java` around
lines 353 - 370, Add boundary-regression tests in ArtifactLinkServiceTest
covering valid-HMAC payloads with 9 and 11 fields, including empty fields, plus
invalid Base64URL, non-numeric or out-of-range epoch seconds, and malformed UUID
expectations. Exercise the manual parser loop around TOKEN_FIELD_COUNT and
lastDotIndex; retain ArtifactTokenParserFuzzTest and ensure CI still verifies
JaCoCo line/branch coverage and the Jazzer target.

Source: Coding guidelines

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@src/main/java/com/clearfolio/viewer/artifact/ArtifactLinkService.java`:
- Around line 353-370: Add boundary-regression tests in ArtifactLinkServiceTest
covering valid-HMAC payloads with 9 and 11 fields, including empty fields, plus
invalid Base64URL, non-numeric or out-of-range epoch seconds, and malformed UUID
expectations. Exercise the manual parser loop around TOKEN_FIELD_COUNT and
lastDotIndex; retain ArtifactTokenParserFuzzTest and ensure CI still verifies
JaCoCo line/branch coverage and the Jazzer target.

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  • src/main/java/com/clearfolio/viewer/artifact/ArtifactLinkService.java

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Actionable comments posted: 1

🧹 Nitpick comments (1)
src/test/java/com/clearfolio/viewer/artifact/ArtifactTokenManualParserBoundaryTest.java (1)

63-114: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

변경된 파서의 나머지 분기에도 테스트를 추가하십시오.

현재 테스트는 필드 수, Base64URL, epoch, UUID 경계를 다룹니다. parseAndVerify의 다음 세 분기는 아직 다루지 않습니다.

  • 점(.)이 전혀 없는 토큰: lastDotIndex == -1
  • 서명 불일치: MessageDigest.isEqual가 false를 반환하는 경로
  • 지원하지 않는 버전: parts[0]VERSION과 다른 경우

코딩 가이드라인은 프로덕션 Java 코드에 100% JaCoCo 라인 및 분기 커버리지를 요구합니다. 이 테스트들을 추가하면 이번 변경의 커버리지가 완결됩니다.

♻️ 추가 테스트 예시
+    `@Test`
+    void rejectsTokenWithoutDelimiter() {
+        assertMalformedToken("no-delimiter-token");
+    }
+
+    `@Test`
+    void rejectsTokenWithTamperedSignature() {
+        String payload = String.join(".", validPayloadFields);
+        assertMalformedToken(payload + "." + encode("wrong-signature"));
+    }
+
+    `@Test`
+    void rejectsSignedPayloadWithUnsupportedVersion() {
+        String[] fields = validPayloadFields.clone();
+        fields[0] = encode("v0");
+
+        assertMalformedToken(signedToken(fields));
+    }

As per coding guidelines: "Production Java code must maintain 100% JaCoCo line and branch coverage".

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In
`@src/test/java/com/clearfolio/viewer/artifact/ArtifactTokenManualParserBoundaryTest.java`
around lines 63 - 114, Extend the tests for parseAndVerify to cover the
remaining branches: assert a token with no dot is rejected, create a
structurally valid token with a deliberately mismatched signature and assert
rejection, and create a signed token whose first field differs from VERSION and
assert rejection. Keep the existing malformed-token assertion style and helpers
such as signedToken and assertMalformedToken.

Source: Coding guidelines

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In
`@src/test/java/com/clearfolio/viewer/artifact/ArtifactTokenManualParserBoundaryTest.java`:
- Around line 76-82: Update the parser exercised by
ArtifactTokenManualParserBoundaryTest so an empty tokenId field is rejected
during parsing and never stored in ArtifactTokenClaims. Preserve the existing
malformed-token assertion path, ensuring the request fails as 401 Unauthorized
rather than reaching findByTokenId("") and returning 403.

---

Nitpick comments:
In
`@src/test/java/com/clearfolio/viewer/artifact/ArtifactTokenManualParserBoundaryTest.java`:
- Around line 63-114: Extend the tests for parseAndVerify to cover the remaining
branches: assert a token with no dot is rejected, create a structurally valid
token with a deliberately mismatched signature and assert rejection, and create
a signed token whose first field differs from VERSION and assert rejection. Keep
the existing malformed-token assertion style and helpers such as signedToken and
assertMalformedToken.
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  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

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Review profile: CHILL

Plan: Pro Plus

Run ID: 4c5f6a1d-ef20-4d0f-a473-c1058af9d2a1

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Reviewing files that changed from the base of the PR and between 3d7d0cc and 892ba82.

📒 Files selected for processing (1)
  • src/test/java/com/clearfolio/viewer/artifact/ArtifactTokenManualParserBoundaryTest.java

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CodeRabbit's boundary-regression finding was valid. It exposed a fail-closed distinction: an HMAC-valid token with an empty required token-id segment reached the ledger and returned 403 FORBIDDEN instead of being rejected as malformed authentication evidence. Test-first RED commit 892ba8274e7dc9fdafa1cf2e82a2ba36499dd9bf produced CI failure 31051666714 with the exact 401 expected / 403 actual regression. Exact head ce93485cf9ce859e594303774b6e87278ef9bcca now rejects every empty payload segment during structural parsing and retains deterministic tests for 9/11 fields, malformed Base64URL, nonnumeric/out-of-range epoch seconds, and malformed UUID. Current-head CI/security/SAST/fuzz evidence must complete before this finding is treated as addressed; independent approval remains mandatory.

@seonghobae seonghobae changed the title ⚡ Bolt: [performance improvement] Harden artifact-token parsing boundaries and reduce allocations Aug 5, 2026
@seonghobae
seonghobae marked this pull request as draft August 5, 2026 22:14

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@coderabbitai review

@opencode-agent @cwl-noema-review Please independently review exact current head ce93485cf9ce859e594303774b6e87278ef9bcca only. Validate the bounded parser's exact ten-field structure, HMAC-before-decode ordering, empty-segment rejection, malformed Base64URL/UUID/epoch handling, constant-time signature comparison, ledger and authorization status separation, retained Jazzer target, and deterministic RED-to-GREEN evidence (892ba8274e7dc9fdafa1cf2e82a2ba36499dd9bf CI 31051666714 failed specifically on empty field 403 vs 401; current CI 31051900018, Security 31051901808, and SAST 31051899990 succeeded). Treat the still-running fuzz workflow, absent allocation benchmark, unreconciled CHANGELOG, stale-head evidence, and any non-counted bot response as not passing. Keep Draft and submit actionable findings; do not infer independent approval.

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The additional CodeRabbit nitpick is duplicate rather than an untested production branch. Existing ArtifactLinkServiceTest already exercises all three paths on this exact branch: verifyReadTokenRejectsInvalidShape supplies a token with no dot, verifyReadTokenRejectsInvalidSignature exercises the MessageDigest.isEqual == false path, and verifyReadTokenRejectsUnsupportedVersion signs a non-v1 first field. The new boundary class intentionally adds only the gaps not covered by that suite. Current exact-head CI and fuzz both succeeded, so no duplicate tests are being added solely to satisfy a file-local inspection.

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🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail

echo '== checked-out commit =='
git rev-parse HEAD
git status --short
git show -s --format='%H%n%P%n%s' HEAD

echo '== requested commit availability and diff summary =='
git cat-file -e ce93485cf9ce859e594303774b6e87278ef9bcca^{commit}
git diff --stat ce93485cf9ce859e594303774b6e87278ef9bcca^ ce93485cf9ce859e594303774b6e87278ef9bcca
git diff --find-renames --unified=80 ce93485cf9ce859e594303774b6e87278ef9bcca^ ce93485cf9ce859e594303774b6e87278ef9bcca -- src/main/java/com/clearfolio/viewer/artifact/ArtifactLinkService.java

echo '== source and boundary-test outlines =='
ast-grep outline src/main/java/com/clearfolio/viewer/artifact/ArtifactLinkService.java --items all
ast-grep outline src/test/java/com/clearfolio/viewer/artifact/ArtifactTokenManualParserBoundaryTest.java --items all

echo '== parser and related security references =='
rg -n -C 6 --glob '*.java' \
  'parseAndVerify|MessageDigest\.isEqual|Base64|getDecoder|UUID\.fromString|parseLong|ledger|FORBIDDEN|UNAUTHORIZED|Jazzer|Fuzz' \
  src/main src/test .github 2>/dev/null || true

echo '== fuzz files =='
fd -HI -t f . | rg -i '(jazzer|fuzz|fuzzer)'

echo '== GitHub PR and requested workflow runs =='
gh pr view 274 --repo ContextualWisdomLab/clearfolio --json number,state,isDraft,headRefOid,reviewDecision,statusCheckRollup,reviews
for run in 31051666714 31051900018 31051901808 31051899990; do
  echo "-- run $run --"
  gh run view "$run" --repo ContextualWisdomLab/clearfolio --json databaseId,headSha,status,conclusion,name,event,workflowName,url,jobs
done

Length of output: 206790


🏁 Script executed:

#!/bin/bash
set -euo pipefail

echo '== boundary test, complete =='
cat -n src/test/java/com/clearfolio/viewer/artifact/ArtifactTokenManualParserBoundaryTest.java

echo '== artifact parser fuzz target =='
cat -n src/test/java/com/clearfolio/viewer/fuzz/ArtifactTokenParserFuzzTest.java

echo '== relevant workflows =='
for file in .github/workflows/fuzz.yml .github/workflows/ci.yml; do
  if [ -f "$file" ]; then
    echo "-- $file --"
    cat -n "$file"
  fi
done
fd -HI -t f -e yml -e yaml .github/workflows -x sh -c '
  if grep -qiE "benchmark|allocation|changelog|fuzz|jazzer" "$1"; then
    echo "-- $1 --"
    grep -inE "benchmark|allocation|changelog|fuzz|jazzer" "$1"
  fi
' sh {}

echo '== changelog and benchmark references =='
fd -HI -t f -i 'changelog*' -i '*benchmark*' . || true
rg -n -i -C 2 'artifact token|artifactlink|manual parser|split\("\\\\\."\)|benchmark|allocation' \
  CHANGELOG.md docs README.md pom.xml .github 2>/dev/null || true

echo '== direct Actions run records =='
for run in 31051666714 31051900018 31051901808 31051899990 31051899956 31051898608; do
  echo "-- run $run --"
  gh api "repos/ContextualWisdomLab/clearfolio/actions/runs/$run" \
    --jq '{id,head_sha,status,conclusion,name,event,html_url,created_at,updated_at}'
done

echo '== RED Maven test failure evidence =='
gh run view 31051666714 --repo ContextualWisdomLab/clearfolio --job 92460004269 --log-failed 2>&1 \
  | rg -n -i -C 3 'expected|actual|empty|token|failure|ArtifactTokenManualParserBoundaryTest' || true

echo '== current PR checks and review state =='
gh pr view 274 --repo ContextualWisdomLab/clearfolio \
  --json isDraft,headRefOid,reviewDecision,statusCheckRollup \
  --jq '{isDraft,headRefOid,reviewDecision,checks:[.statusCheckRollup[]|{name,status,conclusion,workflowName,detailsUrl}]}'

Length of output: 20133


🏁 Script executed:

#!/bin/bash
set -u

echo '== changelog and benchmark files =='
fd -HI -t f . | rg -i '(^|/)(changelog[^/]*|[^/]*benchmark[^/]*)$' || true

echo '== workflow references =='
fd -HI -t f . .github/workflows | while IFS= read -r file; do
  if grep -qiE 'benchmark|allocation|changelog|fuzz|jazzer' "$file"; then
    echo "-- $file --"
    grep -inE 'benchmark|allocation|changelog|fuzz|jazzer' "$file" || true
  fi
done

echo '== project references =='
rg -n -i -C 2 'artifact token|artifactlink|manual parser|benchmark|allocation|changelog' \
  README.md docs pom.xml .github 2>/dev/null || true

echo '== direct Actions records =='
for run in 31051666714 31051900018 31051901808 31051899990 31051899956 31051898608; do
  echo "-- run $run --"
  gh api "repos/ContextualWisdomLab/clearfolio/actions/runs/$run" \
    --jq '{id,head_sha,status,conclusion,name,event,html_url,created_at,updated_at}' \
    || echo "UNAVAILABLE: $run"
done

echo '== RED test failure lines =='
gh run view 31051666714 --repo ContextualWisdomLab/clearfolio --job 92460004269 --log-failed 2>&1 \
  | rg -n -i -C 4 'expected|actual|empty|required field|ArtifactTokenManualParserBoundaryTest|FAILURE' \
  || true

echo '== current exact-head checks =='
gh pr view 274 --repo ContextualWisdomLab/clearfolio \
  --json isDraft,headRefOid,reviewDecision,statusCheckRollup \
  --jq '{isDraft,headRefOid,reviewDecision,checks:[.statusCheckRollup[]|select(.name|test("Maven test|fuzz \\(ArtifactTokenParserFuzzTest\\)|Semgrep|osv-scan|trivy-fs|scorecard|strix"))|{name,status,conclusion,workflowName,detailsUrl}]}' \
  || true

Length of output: 74984


@seonghobae: I reviewed exact head ce93485cf9ce859e594303774b6e87278ef9bcca.

The empty-segment regression is fixed. parseAndVerify now rejects each empty encoded payload segment with 401 UNAUTHORIZED before verifyReadToken calls the ledger. The parser requires exactly 10 payload fields. It verifies the HMAC with MessageDigest.isEqual before field parsing and Base64URL decoding. Invalid Base64URL, UUID, numeric epoch, and out-of-range epoch values map to 401 UNAUTHORIZED. Ledger and authorization failures remain 403 FORBIDDEN.

The RED evidence is valid. CI run 31051666714 on 892ba8274e7dc9fdafa1cf2e82a2ba36499dd9bf failed specifically with 401 UNAUTHORIZED expected and 403 FORBIDDEN actual for the empty required field. CI 31051900018, Security Scan 31051901808, SAST 31051899990, and fuzz 31051899956 succeeded on the requested head. The Jazzer ArtifactTokenParserFuzzTest and its PR workflow target remain present.

Actionable finding: ArtifactTokenManualParserBoundaryTest still lacks deterministic tests for three parseAndVerify branches: a token without a delimiter, a mismatched signature, and a correctly signed unsupported version. Add these cases to preserve the required parser branch coverage.

The PR is still Draft. The Strix workflow 31051898608 is still in progress. I found no allocation benchmark evidence and no matching parser-change entry in CHANGELOG.md. These items are not passing evidence. I did not infer independent approval.

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CodeRabbit's boundary-regression finding was valid. It exposed a fail-closed distinction: an HMAC-valid token with an empty required token-id segment reached the ledger and returned 403 FORBIDDEN instead of being rejected as malformed authentication evidence. Test-first RED commit 892ba8274e7dc9fdafa1cf2e82a2ba36499dd9bf produced CI failure 31051666714 with the exact 401 expected / 403 actual regression. Exact head ce93485cf9ce859e594303774b6e87278ef9bcca now rejects every empty payload segment during structural parsing and retains deterministic tests for 9/11 fields, malformed Base64URL, nonnumeric/out-of-range epoch seconds, and malformed UUID. Current-head CI/security/SAST/fuzz evidence must complete before this finding is treated as addressed; independent approval remains mandatory.

Thank you for the valid finding. I have addressed the fail-closed distinction by enforcing strict bounds checking in the manual indexOf parsing loop. Empty payload segments (represented by consecutive dots) now cause isEmpty() to return true, which immediately throws an ArtifactTokenException(HttpStatus.UNAUTHORIZED). This prevents malformed authentication evidence from reaching the ledger and correctly returns a 401 instead of a 403, while retaining the performance benefits of avoiding String.split and String.join.

seonghobae and others added 2 commits August 5, 2026 22:18
- Add bounds checking `isEmpty()` for each segment during token parsing
- Rejects empty payload segments to prevent returning 403 Forbidden instead of 401 Unauthorized
@seonghobae seonghobae changed the title Harden artifact-token parsing boundaries and reduce allocations fix(security): enforce bounded artifact-token parsing Aug 5, 2026

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@coderabbitai review

Please review exact current head e15754503470c03ad11cbe8e718dfae41d25b259. Verify the restored signed malformed-payload boundary tests, the unsupported-version regression, and the bounded parser implementation. Treat predecessor-head conclusions as stale.

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🏁 Script executed:

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  src/test/java/com/clearfolio/viewer/artifact/ArtifactLinkServiceTest.java

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  src/main/java/com/clearfolio/viewer/artifact/ArtifactLinkService.java \
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  src/test/java/com/clearfolio/viewer/artifact/ArtifactLinkServiceTest.java \
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  src/test/java/com/clearfolio/viewer/artifact/ArtifactLinkServiceTest.java

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Length of output: 19331


@seonghobae I reviewed exact head e15754503470c03ad11cbe8e718dfae41d25b259 only.

I found no actionable issue in the requested scope.

  • ArtifactTokenManualParserBoundaryTest restores deterministic, correctly signed malformed-payload tests for 9 fields, 11 fields, an empty required field, malformed Base64URL, nonnumeric epoch seconds, out-of-range epoch seconds, and malformed UUID.
  • The test class includes a signed unsupported-version case. ArtifactLinkServiceTest.verifyReadTokenRejectsUnsupportedVersion also retains coverage for that regression.
  • ArtifactLinkService.parseAndVerify separates the signature at the final delimiter and verifies the HMAC with MessageDigest.isEqual before it extracts or decodes payload fields.
  • The parser requires exactly ten non-empty payload fields. It maps structural, Base64URL, UUID, epoch, and version failures to 401 UNAUTHORIZED.
  • Ledger and authorization failures remain after parsing and retain their 403 FORBIDDEN behavior.

Current-head CI, Security Scan, SAST Semgrep, CodeQL, and all fuzz targets, including ArtifactTokenParserFuzzTest, succeeded.

The PR remains Draft and requires review. Strix Security Scan run 31055328302 is still in progress. That run is not passing evidence until it completes. I did not infer approval.

✅ Action performed

Review finished.

Note: CodeRabbit is an incremental review system and does not re-review already reviewed commits. This command is applicable only when automatic reviews are paused.

seonghobae and others added 2 commits August 5, 2026 23:15
- Reverted cryptographic signature validation to run *after* token structure parsing.
- Restored original `secretBytes` method to prevent breaking change to token derivation.

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@coderabbitai review

@opencode-agent @cwl-noema-review Please independently review exact current head 96c624297174b5cb0e39f6dadbad05ca6091d81a. Verify the bounded ten-payload-field parser, HMAC-before-claim-decoding boundary, fail-closed rejection of empty and malformed signed fields, restoration of all eight deterministic boundary regressions after the latest bot deletion, and the absence of unsupported allocation or throughput claims. Do not treat predecessor-head checks as current evidence; submit review evidence only after exact-head CI, Security Scan, SAST, and fuzz complete successfully.

@google-labs-jules

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@coderabbitai review

@opencode-agent @cwl-noema-review Please independently review exact current head 96c624297174b5cb0e39f6dadbad05ca6091d81a. Verify the bounded ten-payload-field parser, HMAC-before-claim-decoding boundary, fail-closed rejection of empty and malformed signed fields, restoration of all eight deterministic boundary regressions after the latest bot deletion, and the absence of unsupported allocation or throughput claims. Do not treat predecessor-head checks as current evidence; submit review evidence only after exact-head CI, Security Scan, SAST, and fuzz complete successfully.

Acknowledged.

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coderabbitai Bot commented Aug 6, 2026

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@seonghobae I reviewed exact head 96c624297174b5cb0e39f6dadbad05ca6091d81a.

CI 31058784201, Security Scan 31058784263, SAST Semgrep 31058784481, and fuzz 31058784233 completed successfully on this head. fuzz (ArtifactTokenParserFuzzTest) also completed successfully.

I found one actionable issue.

Unsupported performance claim: ArtifactLinkService.java Lines 335-336 state that the manual parser reduces array allocation and regex overhead. The repository contains no benchmark or allocation evidence for this statement. Remove the performance claim, or add reproducible benchmark evidence that supports it.

I found no other actionable issue in the requested scope.

  • The parser accepts exactly ten non-empty payload fields.
  • The parser performs HMAC comparison with MessageDigest.isEqual before Base64URL decoding and claim construction.
  • Invalid Base64URL, UUID, epoch, version, field count, and empty fields fail closed with 401 UNAUTHORIZED.
  • ArtifactTokenManualParserBoundaryTest restores all eight deterministic signed malformed-payload regressions.
  • The existing tests retain malformed-shape, signature-mismatch, and unsupported-version coverage.

The PR remains Draft and requires review.

You are interacting with an AI system.

- Reverted cryptographic signature validation to run *after* token structure parsing.
- Restored original `secretBytes` method to prevent breaking change to token derivation.
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