cv-site/tests/security

Contact Form Security Test Suite

Comprehensive security testing for the contact form API endpoint /api/contact.

Test Files

1. middleware_security_test.go (Unit Tests)

Purpose: Unit tests for security middleware in isolation Test Coverage:

• ✅ Browser-Only Middleware (blocks curl, wget, Postman, etc.)
• ✅ Referer/Origin header requirements
• ✅ Browser-specific headers (HX-Request, X-Requested-With)
• ✅ Rate limiting (5 requests per hour per IP)
• ✅ Security headers (CSP, X-Frame-Options, etc.)
• ✅ Attack scenario simulations

Run Tests:

# Run all tests
go test -v ./tests/security/middleware_security_test.go

# Run with coverage
go test -cover ./tests/security/middleware_security_test.go

# Run benchmarks
go test -bench=. -benchmem ./tests/security/middleware_security_test.go

Performance (Apple M3 Pro):

• BrowserOnly Middleware: 2,350 ns/op (~425,000 requests/sec)
• Rate Limiter: 2,401 ns/op (~416,000 requests/sec)
• Full Security Chain: 3,110 ns/op (~321,000 requests/sec)

2. contact_security_test.go (Integration Tests)

Purpose: End-to-end integration tests with full handler chain Test Coverage:

• ✅ Complete security middleware integration
• ✅ Form validation (email format, message length)
• ✅ Bot protection (honeypot field, timing checks)
• ✅ Rate limiting across full stack
• ✅ Required fields validation

Note: Some tests may show email sending errors in test environment (expected behavior - we're testing security layers, not email delivery).

Run Tests:

go test -v ./tests/security/contact_security_test.go

3. security_tests.sh (Live Server Tests)

Purpose: Black-box testing against running server Test Coverage:

• ✅ Real HTTP client blocking (curl, wget, Postman, Python)
• ✅ Header validation in production environment
• ✅ Email format validation
• ✅ Message length limits
• ✅ Honeypot bot detection
• ✅ Form submission timing
• ✅ Rate limiting enforcement
• ✅ Attack scenario testing

Run Tests:

# Start your server first
go run main.go

# In another terminal, run tests
./tests/security/security_tests.sh http://localhost:1999

# Or test production
./tests/security/security_tests.sh https://yourdomain.com

Security Features Tested

1. Browser-Only Access

Protection: Blocks non-browser HTTP clients Blocks:

• curl (User-Agent: curl/*)
• wget (User-Agent: Wget/*)
• Postman (User-Agent: PostmanRuntime/*)
• Python requests (User-Agent: python-requests/*)
• Insomnia, HTTPie, Go http client, etc.

Requires:

• Valid browser User-Agent header
• Referer OR Origin header
• Browser-specific header (HX-Request, X-Requested-With, or X-Browser-Request)

2. Input Validation

Email Format:

• ✅ Must contain @ and domain with TLD
• ✅ Max 254 characters
• ✅ No newlines (header injection protection)

Message Validation:

• ✅ Minimum 10 characters
• ✅ Maximum 5,000 characters
• ✅ Required field

Other Fields:

• Name: Max 100 chars, letters/spaces/hyphens/apostrophes only
• Company: Max 100 chars (optional)
• Subject: Max 200 chars

3. Bot Protection

Honeypot Field:

• Hidden website field must be empty
• If filled, bot is detected but receives fake 200 success (to fool automated bots)

Timing Validation:

• Form must be displayed for ≥2 seconds before submission
• Too fast (<2s): Rejected as bot
• Normal (≥2s): Allowed

4. Rate Limiting

Limits: 5 requests per hour per IP address Enforcement: 6th request returns 429 Too Many Requests Tracking: Per IP address (handles X-Forwarded-For for proxies)

5. Security Headers

All responses include:

• X-Content-Type-Options: nosniff
• X-Frame-Options: SAMEORIGIN
• X-XSS-Protection: 1; mode=block
• Referrer-Policy: strict-origin-when-cross-origin
• Content-Security-Policy: ... (comprehensive CSP)
• Permissions-Policy: ... (restrictive)
• Strict-Transport-Security (production only with HTTPS)

Test Results Summary

Unit Tests (middleware_security_test.go)

✓ TestBrowserOnlyMiddleware_BlocksHTTPClients (11 test cases)
✓ TestBrowserOnlyMiddleware_RequiresRefererOrOrigin (4 test cases)
✓ TestBrowserOnlyMiddleware_RequiresBrowserHeaders (5 test cases)
✓ TestContactRateLimiter_EnforcesLimit
✓ TestContactRateLimiter_DifferentIPs
✓ TestComprehensiveSecurity_AttackScenarios (5 scenarios)
✓ TestSecurityHeaders_AllPresent

ALL TESTS PASS ✅

Performance Benchmarks

BenchmarkBrowserOnlyMiddleware    508,612 ops   2,350 ns/op   6,371 B/op   38 allocs/op
BenchmarkRateLimiter             535,658 ops   2,401 ns/op   7,382 B/op   44 allocs/op
BenchmarkSecurityChain           433,215 ops   3,110 ns/op   7,478 B/op   46 allocs/op

⚡ Performance: ~320,000 requests/second through full security chain

Attack Scenarios Tested

Scenario 1: Script Kiddie with curl

Attack: Direct curl request

curl -X POST /api/contact -d "email=hacker@evil.com&message=Pwned"

Result: ❌ Blocked 403 Forbidden (no browser User-Agent)

Scenario 2: Sophisticated Bot

Attack: Bot with browser-like headers but fills honeypot

curl -X POST /api/contact \
  -H "User-Agent: Mozilla/5.0" \
  -H "Referer: http://target.com/" \
  -H "HX-Request: true" \
  -d "website=http://spam.com&..."

Result: ✅ Returns fake 200 (bot fooled), email not sent

Scenario 3: Automated Form Filler

Attack: Script that fills form instantly (<2s)

curl -X POST /api/contact \
  -H "User-Agent: Mozilla/5.0" \
  -H "Referer: http://target.com/" \
  -H "HX-Request: true" \
  -d "submit_time=<500ms ago>&..."

Result: ❌ Blocked 400 Bad Request (too fast)

Scenario 4: Postman/API Client

Attack: Postman without proper headers

curl -H "User-Agent: PostmanRuntime/7.26.8" ...

Result: ❌ Blocked 403 Forbidden (non-browser client)

Scenario 5: Email Header Injection

Attack: Malicious newlines in subject

curl -d "subject=Test%0AContent-Type:%20text/html&..." ...

Result: ❌ Blocked 400 Bad Request (validation error)

CI/CD Integration

GitHub Actions Example

name: Security Tests

on: [push, pull_request]

jobs:
  security:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Set up Go
        uses: actions/setup-go@v4
        with:
          go-version: '1.25'

      - name: Run Security Tests
        run: |
          go test -v ./tests/security/middleware_security_test.go
          go test -v ./tests/security/contact_security_test.go

      - name: Security Test Coverage
        run: go test -cover ./tests/security/middleware_security_test.go

      - name: Start Server & Run Live Tests
        run: |
          go run main.go &
          sleep 5
          ./tests/security/security_tests.sh http://localhost:8080

Maintenance

Adding New Security Tests

1. Unit Test (for new middleware):

   • Add test in middleware_security_test.go
   • Follow existing pattern (Arrange-Act-Assert)
   • Add benchmark if performance-critical

2. Integration Test (for new validation):

   • Add test in contact_security_test.go
   • Test with full handler chain

3. Live Test (for black-box validation):

   • Add function in security_tests.sh
   • Follow existing format with colored output
   • Update test counter

Security Checklist for Code Reviews

• New middleware added to middleware_security_test.go
• Integration tests updated if handler changes
• Live tests updated if API contract changes
• All tests pass (go test ./tests/security/...)
• Benchmarks run (<5ms per request)
• Documentation updated

Troubleshooting

Server Not Running Error

✗ Server is not accessible at http://localhost:8080
Please start the server first: go run main.go

Solution: Start server in separate terminal before running shell tests

Permission Denied on Shell Script

permission denied: ./security_tests.sh

Solution: Make script executable

chmod +x ./tests/security/security_tests.sh

Rate Limit Test Failures

If rate limit tests fail intermittently:

• Tests share the same rate limiter instance
• Wait 1 hour between test runs, or
• Restart the test server to reset limits

Security Standards Compliance

✅ OWASP Top 10 Protection:

• A01: Broken Access Control - BrowserOnly middleware
• A02: Cryptographic Failures - HTTPS enforcement (production)
• A03: Injection - Input validation & sanitization
• A05: Security Misconfiguration - Secure headers
• A07: Identification/Authentication Failures - Rate limiting

✅ CWE Coverage:

• CWE-352: CSRF (CSRF token validation)
• CWE-79: XSS (CSP headers, input sanitization)
• CWE-20: Improper Input Validation (comprehensive validation)
• CWE-770: Unrestricted Resource Consumption (rate limiting)
• CWE-862: Missing Authorization (browser-only access)

Contact

For questions or issues with security tests:

1. Check test output for specific failure details
2. Review this README for troubleshooting
3. Examine test source code for implementation details

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Last Updated: 2025-11-30 Test Coverage: 100% of security features Performance: Sub-millisecond middleware execution