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react-native-security

Secure storage, network traffic, and deep links in React Native mobile apps. Use when implementing secure storage, certificate pinning, or deep link validation in React Native.

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Files included (3)

  • SKILL.md2.4 KB
  • evals/evals.json2.6 KB
  • references/secure-storage.md6.4 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

React Native Security

Priority: P0 (CRITICAL)

Store Credentials Securely

  • Secure Storage: Use react-native-key-chain for tokens, passwords.
  • Never AsyncStorage: Not encrypted. Only for non-sensitive data.
  • Biometric Auth: Use react-native-biometrics for Face ID/Touch ID.

See secure storage reference for secure storage with biometric access control.

Validate Deep Links

  • Validate URLs: Check scheme and host before navigation.
  • Sanitize Params: Never trust URL params. Validate and sanitize.
  • Token Extraction: Avoid passing tokens in deep link URLs. Use secure code exchange.

See secure storage reference for deep link URL validation with scheme and host whitelisting.

Enforce Network Security

  • HTTPS Only: Enforce via NSAppTransportSecurity (iOS) and network_security_config.xml (Android).
  • Certificate Pinning: Use react-native-ssl-pinning for high-security apps (banking, healthcare). Warning: Requires app update when certificates rotate.
  • No Secrets in Code: Use .env files with react-native-config. Add to .gitignore.
  • Verify: Test by attempting plain HTTP requests in dev; confirm they rejected.

Protect Sensitive Data

  • PII Masking: Mask email/phone in logs and analytics.
  • Clipboard: Clear sensitive data after paste.
  • Screenshots: Block on sensitive screens with react-native-screen-guard.
  • Hermes: Bytecode harder to reverse-engineer. ProGuard/R8: Enable on Android.

Anti-Patterns

  • No Hardcoded Secrets: Use environment variables.
  • No Sensitive Logs: Strip console.log in production.
  • No Plain HTTP: Always use HTTPS.
  • No Client-Side Auth: Validate on backend.

References

See references/secure-storage.md for secure storage, Biometrics, SSL Pinning, and PII Masking.

Pinning verification checklist

  • Test that a request fails with an untrusted or changed certificate, and document rotation and recovery before shipping certificate pins.

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