Code signing troubleshooting

Code Signing Troubleshooting

Instructions

Signing errors are almost always one of five categories: wrong certificate, wrong profile, wrong entitlements, wrong bundle id, or a stale cache. Work through this skill top-to-bottom — the order matches how often each fault occurs in practice.

1. First, Get the Full Error

Xcode and Gradle both truncate signing errors. Re-run with verbose flags:

# iOS
xcodebuild -workspace Runner.xcworkspace -scheme Runner \
  -configuration Release archive -archivePath out.xcarchive \
  CODE_SIGN_STYLE=Manual -verbose | tee build.log

# Android
./gradlew :app:bundleRelease --info --stacktrace

Grep for error:, Signing Identity, and Provisioning Profile.

2. Apple — No signing certificate "iOS Distribution" found

Cause: no matching certificate in the keychain.

Fix:

security find-identity -v -p codesigning
# Expect at least one "Apple Distribution: <Team>" line.
bundle exec fastlane match appstore --readonly

If match reports a cert exists remotely but locally missing, delete ~/Library/MobileDevice/Provisioning Profiles and re-run.

3. Apple — Provisioning profile doesn't include the entitlement

Cause: entitlements file references a capability not enabled on the App ID.

Fix:

1. Developer portal → Identifiers → select App ID → enable the capability.
2. Regenerate profile: bundle exec fastlane match nuke appstore && bundle exec fastlane match appstore.
3. Confirm Runner.entitlements matches what the portal shows.

4. Apple — The executable was signed with invalid entitlements

Upload to App Store Connect rejected. Usually get-task-allow = true leaked into a release build (debug entitlements in a release build). In ExportOptions.plist:

<key>signingStyle</key>
<string>manual</string>
<key>method</key>
<string>app-store</string>

Never set -allowProvisioningUpdates on a release export; it can pull a development profile.

5. Apple — App Store Connect reported an error uploading

Often transient. Retry with the API key, not password:

xcrun altool --upload-app -f MyApp.ipa \
  --apiKey "$APP_STORE_CONNECT_KEY_ID" \
  --apiIssuer "$APP_STORE_CONNECT_ISSUER_ID"

If it persists, check Apple System Status before assuming a local fault.

6. Google — Your APK or Android App Bundle was signed with a key that is not in Play Console

Cause: uploading with a new keystore.

Fix: revert to the original upload key. If lost, Play Console → App integrity → Request upload key reset (wait 1–2 days). Do not rename bundles to work around this — it creates a duplicate listing.

7. Google — Signature verification failed: v1 signature scheme missing

Cause: minSdk < 24 but v2+ only. Fix in app/build.gradle.kts:

android.signingConfigs.getByName("release") {
    enableV1Signing = true
    enableV2Signing = true
    enableV3Signing = true
}

8. Google — INSTALL_PARSE_FAILED_NO_CERTIFICATES on device

The APK is unsigned or signature corrupted. Re-sign:

apksigner sign --ks upload-keystore.jks \
  --ks-key-alias upload \
  --ks-pass env:KEYSTORE_PASSWORD \
  --out app-release-signed.apk \
  app-release-unsigned.apk

apksigner verify --verbose app-release-signed.apk

9. Stale Caches (Both Platforms)

When nothing else explains it, clear:

# iOS
rm -rf ~/Library/Developer/Xcode/DerivedData
rm -rf ~/Library/MobileDevice/Provisioning\ Profiles/*.mobileprovision

# Android
./gradlew clean
rm -rf ~/.gradle/caches/transforms-*

Re-run the signing lane from scratch.

10. Diagnostic Commands Cheat Sheet

# Inspect an IPA's embedded profile
unzip -p MyApp.ipa "Payload/*.app/embedded.mobileprovision" \
  | security cms -D | plutil -p -

# Inspect an AAB
bundletool dump manifest --bundle=app-release.aab
bundletool dump resources --bundle=app-release.aab

# List signing identities
security find-identity -v -p codesigning

# Check APK signatures
apksigner verify --print-certs app-release.apk

11. Escalation Path

1. Reproduce locally with the exact CI command.
2. Compare the failing artefact against the last successful one (diff the profile plists).
3. Check cert/profile expiry in the Developer portal and Play Console.
4. Open an Apple Developer Technical Support ticket or Play Console help request only after the above three steps.

12. Checklist

• Full verbose log captured before touching anything.
• Cert/profile expiry confirmed current.
• Entitlements file matches App ID capabilities.
• match or supply readonly mode used on CI to prevent accidental regeneration.
• Derived Data / Gradle caches cleared on "nothing changed but it broke" issues.
• Fix written up in docs/signing-playbook.md for the next time.