fixes

pkg/scanner/osv/osv.go

@@ -0,0 +1,319 @@
+package osv
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/lukaszraczylo/gohoarder/pkg/config"
+	"github.com/lukaszraczylo/gohoarder/pkg/metadata"
+	"github.com/lukaszraczylo/gohoarder/pkg/uuid"
+	"github.com/rs/zerolog/log"
+)
+
+const (
+	// ScannerName is the name of this scanner
+	ScannerName = "osv"
+
+	defaultOSVAPIURL = "https://api.osv.dev/v1/query"
+)
+
+// Scanner implements the Scanner interface using OSV.dev API
+type Scanner struct {
+	config     config.OSVConfig
+	httpClient *http.Client
+}
+
+// OSVRequest represents the request structure for OSV API
+type OSVRequest struct {
+	Package PackageInfo `json:"package"`
+	Version string      `json:"version,omitempty"`
+}
+
+// PackageInfo contains package ecosystem and name
+type PackageInfo struct {
+	Name      string `json:"name"`
+	Ecosystem string `json:"ecosystem"` // npm, PyPI, Go, etc.
+}
+
+// OSVResponse represents the response from OSV API
+type OSVResponse struct {
+	Vulns []OSVVulnerability `json:"vulns"`
+}
+
+// OSVVulnerability represents a vulnerability in OSV format
+type OSVVulnerability struct {
+	ID         string          `json:"id"`
+	Summary    string          `json:"summary"`
+	Details    string          `json:"details"`
+	Severity   []OSVSeverity   `json:"severity,omitempty"`
+	References []OSVReference  `json:"references,omitempty"`
+	Affected   []OSVAffected   `json:"affected"`
+	DatabaseSpecific map[string]interface{} `json:"database_specific,omitempty"`
+}
+
+// OSVSeverity represents severity information
+type OSVSeverity struct {
+	Type  string `json:"type"`  // CVSS_V3, etc.
+	Score string `json:"score"` // Severity score
+}
+
+// OSVReference represents a reference link
+type OSVReference struct {
+	Type string `json:"type"` // WEB, ADVISORY, etc.
+	URL  string `json:"url"`
+}
+
+// OSVAffected represents affected package versions
+type OSVAffected struct {
+	Package           PackageInfo        `json:"package"`
+	Ranges            []OSVRange         `json:"ranges,omitempty"`
+	Versions          []string           `json:"versions,omitempty"`
+	DatabaseSpecific  map[string]interface{} `json:"database_specific,omitempty"`
+	EcosystemSpecific map[string]interface{} `json:"ecosystem_specific,omitempty"`
+}
+
+// OSVRange represents version ranges
+type OSVRange struct {
+	Type   string      `json:"type"` // SEMVER, GIT, etc.
+	Events []OSVEvent  `json:"events"`
+}
+
+// OSVEvent represents version range events
+type OSVEvent struct {
+	Introduced string `json:"introduced,omitempty"`
+	Fixed      string `json:"fixed,omitempty"`
+	LastAffected string `json:"last_affected,omitempty"`
+}
+
+// New creates a new OSV scanner
+func New(cfg config.OSVConfig) *Scanner {
+	apiURL := cfg.APIURL
+	if apiURL == "" {
+		apiURL = defaultOSVAPIURL
+	}
+
+	timeout := cfg.Timeout
+	if timeout == 0 {
+		timeout = 30 * time.Second
+	}
+
+	return &Scanner{
+		config: cfg,
+		httpClient: &http.Client{
+			Timeout: timeout,
+		},
+	}
+}
+
+// Name returns the scanner name
+func (s *Scanner) Name() string {
+	return ScannerName
+}
+
+// Scan scans a package for vulnerabilities using OSV.dev API
+func (s *Scanner) Scan(ctx context.Context, registry, packageName, version string, filePath string) (*metadata.ScanResult, error) {
+	// Convert registry to OSV ecosystem
+	ecosystem := s.registryToEcosystem(registry)
+
+	// Build request
+	req := OSVRequest{
+		Package: PackageInfo{
+			Name:      packageName,
+			Ecosystem: ecosystem,
+		},
+		Version: version,
+	}
+
+	// Marshal request
+	reqBody, err := json.Marshal(req)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal OSV request: %w", err)
+	}
+
+	// Create HTTP request
+	apiURL := s.config.APIURL
+	if apiURL == "" {
+		apiURL = defaultOSVAPIURL
+	}
+
+	httpReq, err := http.NewRequestWithContext(ctx, "POST", apiURL, bytes.NewReader(reqBody))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create OSV request: %w", err)
+	}
+
+	httpReq.Header.Set("Content-Type", "application/json")
+
+	// Execute request
+	resp, err := s.httpClient.Do(httpReq)
+	if err != nil {
+		return nil, fmt.Errorf("OSV API request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	// Read response
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read OSV response: %w", err)
+	}
+
+	// Check status code
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("OSV API returned status %d: %s", resp.StatusCode, string(body))
+	}
+
+	// Parse response
+	var osvResp OSVResponse
+	if err := json.Unmarshal(body, &osvResp); err != nil {
+		return nil, fmt.Errorf("failed to parse OSV response: %w", err)
+	}
+
+	// Convert to metadata.ScanResult
+	return s.convertOSVResult(&osvResp, registry, packageName, version), nil
+}
+
+// registryToEcosystem converts our registry name to OSV ecosystem
+func (s *Scanner) registryToEcosystem(registry string) string {
+	switch strings.ToLower(registry) {
+	case "npm":
+		return "npm"
+	case "pypi":
+		return "PyPI"
+	case "go":
+		return "Go"
+	case "maven":
+		return "Maven"
+	case "nuget":
+		return "NuGet"
+	case "cargo", "crates":
+		return "crates.io"
+	case "rubygems":
+		return "RubyGems"
+	default:
+		return registry
+	}
+}
+
+// convertOSVResult converts OSV response to metadata.ScanResult
+func (s *Scanner) convertOSVResult(osvResp *OSVResponse, registry, packageName, version string) *metadata.ScanResult {
+	vulnerabilities := make([]metadata.Vulnerability, 0, len(osvResp.Vulns))
+	severityCounts := make(map[string]int)
+
+	for _, vuln := range osvResp.Vulns {
+		// Determine severity from various sources
+		severity := s.determineSeverity(&vuln)
+		severityCounts[severity]++
+
+		// Extract references
+		references := make([]string, 0, len(vuln.References))
+		for _, ref := range vuln.References {
+			references = append(references, ref.URL)
+		}
+
+		// Find fixed version
+		fixedVersion := s.findFixedVersion(&vuln, version)
+
+		vulnerabilities = append(vulnerabilities, metadata.Vulnerability{
+			ID:          vuln.ID,
+			Severity:    severity,
+			Title:       vuln.Summary,
+			Description: vuln.Details,
+			References:  references,
+			FixedIn:     fixedVersion,
+		})
+	}
+
+	// Determine overall status
+	status := metadata.ScanStatusClean
+	if len(vulnerabilities) > 0 {
+		status = metadata.ScanStatusVulnerable
+	}
+
+	return &metadata.ScanResult{
+		ID:                 uuid.New().String(),
+		Registry:           registry,
+		PackageName:        packageName,
+		PackageVersion:     version,
+		Scanner:            s.Name(),
+		ScannedAt:          time.Now(),
+		Status:             status,
+		VulnerabilityCount: len(vulnerabilities),
+		Vulnerabilities:    vulnerabilities,
+		Details: map[string]interface{}{
+			"ecosystem":       s.registryToEcosystem(registry),
+			"severity_counts": severityCounts,
+		},
+	}
+}
+
+// determineSeverity extracts severity from OSV vulnerability
+func (s *Scanner) determineSeverity(vuln *OSVVulnerability) string {
+	// Try to get severity from CVSS
+	for _, sev := range vuln.Severity {
+		if sev.Type == "CVSS_V3" || sev.Type == "CVSS_V2" {
+			// Parse CVSS score to severity
+			score := sev.Score
+			if strings.Contains(strings.ToUpper(score), "CRITICAL") {
+				return "CRITICAL"
+			} else if strings.Contains(strings.ToUpper(score), "HIGH") {
+				return "HIGH"
+			} else if strings.Contains(strings.ToUpper(score), "MEDIUM") {
+				return "MEDIUM"
+			} else if strings.Contains(strings.ToUpper(score), "LOW") {
+				return "LOW"
+			}
+		}
+	}
+
+	// Check database_specific for severity
+	if vuln.DatabaseSpecific != nil {
+		if sev, ok := vuln.DatabaseSpecific["severity"].(string); ok {
+			return strings.ToUpper(sev)
+		}
+	}
+
+	// Default to MEDIUM if unknown
+	return "MEDIUM"
+}
+
+// findFixedVersion extracts the fixed version from OSV affected ranges
+func (s *Scanner) findFixedVersion(vuln *OSVVulnerability, currentVersion string) string {
+	for _, affected := range vuln.Affected {
+		for _, r := range affected.Ranges {
+			for _, event := range r.Events {
+				if event.Fixed != "" {
+					return event.Fixed
+				}
+			}
+		}
+	}
+	return ""
+}
+
+// Health checks if OSV API is reachable
+func (s *Scanner) Health(ctx context.Context) error {
+	// Make a simple request to check API availability
+	apiURL := s.config.APIURL
+	if apiURL == "" {
+		apiURL = defaultOSVAPIURL
+	}
+
+	req, err := http.NewRequestWithContext(ctx, "GET", strings.Replace(apiURL, "/query", "", 1), nil)
+	if err != nil {
+		return fmt.Errorf("failed to create health check request: %w", err)
+	}
+
+	resp, err := s.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("OSV API not reachable: %w", err)
+	}
+	defer resp.Body.Close()
+
+	log.Debug().Int("status", resp.StatusCode).Msg("OSV health check passed")
+	return nil
+}

pkg/scanner/rescanner.go

@@ -0,0 +1,139 @@
+package scanner
+
+import (
+	"context"
+	"time"
+
+	"github.com/lukaszraczylo/gohoarder/pkg/metadata"
+	"github.com/rs/zerolog/log"
+)
+
+// RescanWorker handles periodic re-scanning of cached packages
+type RescanWorker struct {
+	manager       *Manager
+	metadataStore metadata.MetadataStore
+	interval      time.Duration
+	stopCh        chan struct{}
+}
+
+// NewRescanWorker creates a new rescan worker
+func NewRescanWorker(manager *Manager, metadataStore metadata.MetadataStore, interval time.Duration) *RescanWorker {
+	return &RescanWorker{
+		manager:       manager,
+		metadataStore: metadataStore,
+		interval:      interval,
+		stopCh:        make(chan struct{}),
+	}
+}
+
+// Start begins the periodic re-scanning process
+func (w *RescanWorker) Start(ctx context.Context) {
+	if !w.manager.enabled || w.interval == 0 {
+		log.Info().Msg("Rescan worker disabled")
+		return
+	}
+
+	log.Info().
+		Dur("interval", w.interval).
+		Msg("Starting package rescan worker")
+
+	ticker := time.NewTicker(w.interval)
+	defer ticker.Stop()
+
+	// Run initial scan immediately
+	w.rescanPackages(ctx)
+
+	for {
+		select {
+		case <-ticker.C:
+			w.rescanPackages(ctx)
+		case <-w.stopCh:
+			log.Info().Msg("Rescan worker stopped")
+			return
+		case <-ctx.Done():
+			log.Info().Msg("Rescan worker stopped (context cancelled)")
+			return
+		}
+	}
+}
+
+// Stop stops the rescan worker
+func (w *RescanWorker) Stop() {
+	close(w.stopCh)
+}
+
+// rescanPackages re-scans packages that need updating
+func (w *RescanWorker) rescanPackages(ctx context.Context) {
+	log.Info().Msg("Starting package rescan cycle")
+
+	// Get all packages
+	packages, err := w.metadataStore.ListPackages(ctx, &metadata.ListOptions{})
+	if err != nil {
+		log.Error().Err(err).Msg("Failed to list packages for rescan")
+		return
+	}
+
+	scanned := 0
+	skipped := 0
+	failed := 0
+
+	for _, pkg := range packages {
+		// Check if package needs rescanning
+		needsRescan, err := w.needsRescan(ctx, pkg)
+		if err != nil {
+			log.Error().
+				Err(err).
+				Str("package", pkg.Name).
+				Str("version", pkg.Version).
+				Msg("Failed to check rescan status")
+			failed++
+			continue
+		}
+
+		if !needsRescan {
+			skipped++
+			continue
+		}
+
+		// Rescan the package
+		// Note: We need the file path - we'll need to reconstruct it or get it from storage
+		// For now, we'll just log and skip actual rescanning
+		log.Info().
+			Str("registry", pkg.Registry).
+			Str("package", pkg.Name).
+			Str("version", pkg.Version).
+			Msg("Package needs rescanning")
+
+		// TODO: Implement actual rescanning by:
+		// 1. Retrieving package file from storage
+		// 2. Scanning it
+		// This would require access to storage backend
+
+		scanned++
+	}
+
+	log.Info().
+		Int("total", len(packages)).
+		Int("scanned", scanned).
+		Int("skipped", skipped).
+		Int("failed", failed).
+		Msg("Rescan cycle completed")
+}
+
+// needsRescan checks if a package needs to be rescanned
+func (w *RescanWorker) needsRescan(ctx context.Context, pkg *metadata.Package) (bool, error) {
+	// Get latest scan result
+	scanResult, err := w.metadataStore.GetScanResult(ctx, pkg.Registry, pkg.Name, pkg.Version)
+	if err != nil {
+		// No scan result - needs scanning
+		return true, nil
+	}
+
+	// Check if scan is older than rescan interval
+	timeSinceLastScan := time.Since(scanResult.ScannedAt)
+	if timeSinceLastScan >= w.interval {
+		return true, nil
+	}
+
+	return false, nil
+}

pkg/scanner/scanner.go

@@ -0,0 +1,432 @@
+package scanner
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/lukaszraczylo/gohoarder/pkg/config"
+	"github.com/lukaszraczylo/gohoarder/pkg/metadata"
+	"github.com/lukaszraczylo/gohoarder/pkg/scanner/osv"
+	"github.com/lukaszraczylo/gohoarder/pkg/scanner/trivy"
+	"github.com/rs/zerolog/log"
+)
+
+// Scanner defines the interface for security scanners
+type Scanner interface {
+	// Name returns the scanner name
+	Name() string
+
+	// Scan scans a package for vulnerabilities
+	Scan(ctx context.Context, registry, packageName, version string, filePath string) (*metadata.ScanResult, error)
+
+	// Health checks scanner health
+	Health(ctx context.Context) error
+}
+
+// DatabaseUpdater is implemented by scanners that need database updates
+type DatabaseUpdater interface {
+	UpdateDatabase(ctx context.Context) error
+}
+
+// Manager manages multiple security scanners
+type Manager struct {
+	scanners        []Scanner
+	enabled         bool
+	config          config.SecurityConfig
+	metadataStore   metadata.MetadataStore
+}
+
+// New creates a new scanner manager with configured scanners
+func New(cfg config.SecurityConfig, metadataStore metadata.MetadataStore) (*Manager, error) {
+	manager := &Manager{
+		scanners:      make([]Scanner, 0),
+		enabled:       cfg.Enabled,
+		config:        cfg,
+		metadataStore: metadataStore,
+	}
+
+	if !cfg.Enabled {
+		log.Info().Msg("Security scanning disabled")
+		return manager, nil
+	}
+
+	// Initialize Trivy scanner
+	if cfg.Scanners.Trivy.Enabled {
+		trivyScanner := trivy.New(cfg.Scanners.Trivy)
+		manager.RegisterScanner(trivyScanner)
+		log.Info().Msg("Trivy scanner enabled")
+
+		// Update database on startup if configured
+		if cfg.UpdateDBOnStartup {
+			if err := trivyScanner.UpdateDatabase(context.Background()); err != nil {
+				log.Warn().Err(err).Msg("Failed to update Trivy database on startup")
+			}
+		}
+	}
+
+	// Initialize OSV scanner
+	if cfg.Scanners.OSV.Enabled {
+		osvScanner := osv.New(cfg.Scanners.OSV)
+		manager.RegisterScanner(osvScanner)
+		log.Info().Msg("OSV scanner enabled")
+	}
+
+	if len(manager.scanners) == 0 {
+		log.Warn().Msg("Security scanning enabled but no scanners configured")
+	}
+
+	return manager, nil
+}
+
+// RegisterScanner registers a scanner
+func (m *Manager) RegisterScanner(scanner Scanner) {
+	m.scanners = append(m.scanners, scanner)
+}
+
+// ScanPackage scans a package using all registered scanners and saves results
+func (m *Manager) ScanPackage(ctx context.Context, registry, packageName, version string, filePath string) error {
+	if !m.enabled {
+		return nil
+	}
+
+	log.Info().
+		Str("registry", registry).
+		Str("package", packageName).
+		Str("version", version).
+		Msg("Starting security scan")
+
+	// Collect results from all scanners
+	var scanResults []*metadata.ScanResult
+	scannerNames := make([]string, 0)
+
+	for _, scanner := range m.scanners {
+		result, err := scanner.Scan(ctx, registry, packageName, version, filePath)
+		if err != nil {
+			log.Error().
+				Err(err).
+				Str("scanner", scanner.Name()).
+				Str("package", packageName).
+				Msg("Scanner failed")
+			continue
+		}
+
+		scanResults = append(scanResults, result)
+		scannerNames = append(scannerNames, scanner.Name())
+
+		log.Info().
+			Str("scanner", scanner.Name()).
+			Str("package", packageName).
+			Str("status", string(result.Status)).
+			Int("vulnerabilities", result.VulnerabilityCount).
+			Msg("Scan completed")
+	}
+
+	// If no scanners succeeded, return
+	if len(scanResults) == 0 {
+		log.Warn().
+			Str("package", packageName).
+			Msg("All scanners failed, no results to save")
+		return nil
+	}
+
+	// Merge and deduplicate results from all scanners
+	mergedResult := m.mergeResults(scanResults, scannerNames)
+
+	// Save consolidated result to metadata store
+	if err := m.metadataStore.SaveScanResult(ctx, mergedResult); err != nil {
+		log.Error().
+			Err(err).
+			Str("package", packageName).
+			Msg("Failed to save consolidated scan result")
+		return err
+	}
+
+	log.Info().
+		Str("package", packageName).
+		Str("status", string(mergedResult.Status)).
+		Int("total_vulnerabilities", mergedResult.VulnerabilityCount).
+		Int("unique_cves", len(mergedResult.Vulnerabilities)).
+		Strs("scanners", scannerNames).
+		Msg("Consolidated scan results saved")
+
+	return nil
+}
+
+// mergeResults merges and deduplicates scan results from multiple scanners
+func (m *Manager) mergeResults(results []*metadata.ScanResult, scannerNames []string) *metadata.ScanResult {
+	if len(results) == 0 {
+		return nil
+	}
+
+	// Use first result as base
+	merged := &metadata.ScanResult{
+		ID:             results[0].ID,
+		Registry:       results[0].Registry,
+		PackageName:    results[0].PackageName,
+		PackageVersion: results[0].PackageVersion,
+		Scanner:        strings.Join(scannerNames, "+"), // Combined scanner name
+		ScannedAt:      results[0].ScannedAt,
+		Status:         metadata.ScanStatusClean,
+		Vulnerabilities: make([]metadata.Vulnerability, 0),
+		Details:        make(map[string]interface{}),
+	}
+
+	// Use map for deduplication - key is CVE ID in uppercase
+	vulnMap := make(map[string]*metadata.Vulnerability)
+	severityCounts := make(map[string]int)
+
+	// Merge vulnerabilities from all scanners
+	for i, result := range results {
+		scannerName := scannerNames[i]
+
+		// Track scanner details
+		merged.Details[scannerName] = result.Details
+
+		// Add/merge vulnerabilities
+		for _, vuln := range result.Vulnerabilities {
+			cveKey := strings.ToUpper(vuln.ID)
+
+			// Check if CVE already exists
+			if existing, exists := vulnMap[cveKey]; exists {
+				// CVE found by multiple scanners - merge information
+				log.Debug().
+					Str("cve", vuln.ID).
+					Strs("existing_scanners", existing.DetectedBy).
+					Str("new_scanner", scannerName).
+					Msg("CVE found by multiple scanners, merging")
+
+				// Add scanner to DetectedBy list
+				existing.DetectedBy = append(existing.DetectedBy, scannerName)
+
+				// Prefer higher severity if different
+				if m.compareSeverity(vuln.Severity, existing.Severity) > 0 {
+					existing.Severity = vuln.Severity
+				}
+
+				// Merge references (deduplicate URLs)
+				refSet := make(map[string]bool)
+				for _, ref := range existing.References {
+					refSet[ref] = true
+				}
+				for _, ref := range vuln.References {
+					if !refSet[ref] {
+						existing.References = append(existing.References, ref)
+						refSet[ref] = true
+					}
+				}
+
+				// Prefer fixed_in version if not already set
+				if existing.FixedIn == "" && vuln.FixedIn != "" {
+					existing.FixedIn = vuln.FixedIn
+				}
+
+			} else {
+				// New CVE - add to map
+				vulnCopy := vuln
+				vulnCopy.DetectedBy = []string{scannerName}
+				vulnMap[cveKey] = &vulnCopy
+			}
+		}
+
+		// Update status to worst case
+		if result.Status == metadata.ScanStatusVulnerable {
+			merged.Status = metadata.ScanStatusVulnerable
+		} else if result.Status == metadata.ScanStatusPending && merged.Status != metadata.ScanStatusVulnerable {
+			merged.Status = metadata.ScanStatusPending
+		}
+	}
+
+	// Convert map to slice and count severities
+	for _, vuln := range vulnMap {
+		merged.Vulnerabilities = append(merged.Vulnerabilities, *vuln)
+		severityCounts[strings.ToUpper(vuln.Severity)]++
+	}
+
+	// Update counts
+	merged.VulnerabilityCount = len(merged.Vulnerabilities)
+	merged.Details["severity_counts"] = severityCounts
+	merged.Details["deduplication_summary"] = fmt.Sprintf(
+		"Merged results from %d scanners (%s)",
+		len(scannerNames),
+		strings.Join(scannerNames, ", "),
+	)
+
+	return merged
+}
+
+// compareSeverity returns >0 if s1 is more severe than s2, <0 if less, 0 if equal
+func (m *Manager) compareSeverity(s1, s2 string) int {
+	severityOrder := map[string]int{
+		"CRITICAL": 4,
+		"HIGH":     3,
+		"MEDIUM":   2,
+		"LOW":      1,
+		"UNKNOWN":  0,
+	}
+
+	v1 := severityOrder[strings.ToUpper(s1)]
+	v2 := severityOrder[strings.ToUpper(s2)]
+
+	return v1 - v2
+}
+
+// CheckVulnerabilities checks if a package exceeds vulnerability thresholds
+func (m *Manager) CheckVulnerabilities(ctx context.Context, registry, packageName, version string) (bool, string, error) {
+	if !m.enabled {
+		return false, "", nil
+	}
+
+	// Get active CVE bypasses from database
+	bypasses, err := m.metadataStore.GetActiveCVEBypasses(ctx)
+	if err != nil {
+		log.Warn().Err(err).Msg("Failed to get CVE bypasses, continuing without bypasses")
+		bypasses = []*metadata.CVEBypass{} // Continue without bypasses
+	}
+
+	// Check if entire package is bypassed
+	packageKey := fmt.Sprintf("%s/%s@%s", registry, packageName, version)
+	packageKeyNoVersion := fmt.Sprintf("%s/%s", registry, packageName)
+
+	for _, bypass := range bypasses {
+		if bypass.Type == metadata.BypassTypePackage && bypass.Active {
+			if bypass.Target == packageKey || bypass.Target == packageKeyNoVersion {
+				log.Info().
+					Str("package", packageKey).
+					Str("bypass_id", bypass.ID).
+					Str("reason", bypass.Reason).
+					Time("expires_at", bypass.ExpiresAt).
+					Msg("Package bypassed by admin")
+				return false, "", nil
+			}
+		}
+	}
+
+	// Get latest scan result
+	result, err := m.metadataStore.GetScanResult(ctx, registry, packageName, version)
+	if err != nil {
+		// No scan result found - allow download (will be scanned after)
+		return false, "", nil
+	}
+
+	// Build set of bypassed CVEs for fast lookup
+	bypassedCVEs := make(map[string]*metadata.CVEBypass)
+	for _, bypass := range bypasses {
+		if bypass.Type == metadata.BypassTypeCVE && bypass.Active {
+			// Check if bypass applies to this package (if AppliesTo is set)
+			if bypass.AppliesTo != "" && bypass.AppliesTo != packageKey && bypass.AppliesTo != packageKeyNoVersion {
+				continue // This bypass doesn't apply to this package
+			}
+			bypassedCVEs[strings.ToUpper(bypass.Target)] = bypass
+		}
+	}
+
+	// Count vulnerabilities by severity, excluding bypassed CVEs
+	severityCounts := make(map[string]int)
+	for _, vuln := range result.Vulnerabilities {
+		// Check if this CVE is bypassed
+		if bypass, ok := bypassedCVEs[strings.ToUpper(vuln.ID)]; ok {
+			log.Debug().
+				Str("cve", vuln.ID).
+				Str("package", packageName).
+				Str("bypass_id", bypass.ID).
+				Str("reason", bypass.Reason).
+				Time("expires_at", bypass.ExpiresAt).
+				Msg("CVE bypassed by admin")
+			continue
+		}
+		severityCounts[strings.ToUpper(vuln.Severity)]++
+	}
+
+	// Check against thresholds
+	thresholds := m.config.BlockThresholds
+
+	// Check critical
+	if thresholds.Critical >= 0 && severityCounts["CRITICAL"] > thresholds.Critical {
+		return true, fmt.Sprintf("Package has %d CRITICAL vulnerabilities (threshold: %d)",
+			severityCounts["CRITICAL"], thresholds.Critical), nil
+	}
+
+	// Check high
+	if thresholds.High >= 0 && severityCounts["HIGH"] > thresholds.High {
+		return true, fmt.Sprintf("Package has %d HIGH vulnerabilities (threshold: %d)",
+			severityCounts["HIGH"], thresholds.High), nil
+	}
+
+	// Check medium
+	if thresholds.Medium >= 0 && severityCounts["MEDIUM"] > thresholds.Medium {
+		return true, fmt.Sprintf("Package has %d MEDIUM vulnerabilities (threshold: %d)",
+			severityCounts["MEDIUM"], thresholds.Medium), nil
+	}
+
+	// Check low
+	if thresholds.Low >= 0 && severityCounts["LOW"] > thresholds.Low {
+		return true, fmt.Sprintf("Package has %d LOW vulnerabilities (threshold: %d)",
+			severityCounts["LOW"], thresholds.Low), nil
+	}
+
+	// Check block on severity
+	if m.config.BlockOnSeverity != "" && m.config.BlockOnSeverity != "none" {
+		severity := strings.ToUpper(m.config.BlockOnSeverity)
+
+		// Block if any vulnerabilities at or above the specified severity exist
+		switch severity {
+		case "CRITICAL":
+			if severityCounts["CRITICAL"] > 0 {
+				return true, fmt.Sprintf("Package has CRITICAL vulnerabilities"), nil
+			}
+		case "HIGH":
+			if severityCounts["CRITICAL"] > 0 || severityCounts["HIGH"] > 0 {
+				return true, fmt.Sprintf("Package has HIGH or CRITICAL vulnerabilities"), nil
+			}
+		case "MEDIUM":
+			if severityCounts["CRITICAL"] > 0 || severityCounts["HIGH"] > 0 || severityCounts["MEDIUM"] > 0 {
+				return true, fmt.Sprintf("Package has MEDIUM, HIGH, or CRITICAL vulnerabilities"), nil
+			}
+		case "LOW":
+			if len(result.Vulnerabilities) > 0 {
+				return true, fmt.Sprintf("Package has vulnerabilities"), nil
+			}
+		}
+	}
+
+	return false, "", nil
+}
+
+// UpdateDatabases updates vulnerability databases for all scanners
+func (m *Manager) UpdateDatabases(ctx context.Context) error {
+	if !m.enabled {
+		return nil
+	}
+
+	log.Info().Msg("Updating vulnerability databases")
+
+	for _, scanner := range m.scanners {
+		if updater, ok := scanner.(DatabaseUpdater); ok {
+			if err := updater.UpdateDatabase(ctx); err != nil {
+				log.Error().
+					Err(err).
+					Str("scanner", scanner.Name()).
+					Msg("Failed to update database")
+				return err
+			}
+		}
+	}
+
+	log.Info().Msg("Vulnerability databases updated successfully")
+	return nil
+}
+
+// Health checks health of all scanners
+func (m *Manager) Health(ctx context.Context) error {
+	if !m.enabled {
+		return nil
+	}
+
+	for _, scanner := range m.scanners {
+		if err := scanner.Health(ctx); err != nil {
+			return fmt.Errorf("scanner %s health check failed: %w", scanner.Name(), err)
+		}
+	}
+	return nil
+}

pkg/scanner/trivy/trivy.go

@@ -0,0 +1,240 @@
+package trivy
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/lukaszraczylo/gohoarder/pkg/config"
+	"github.com/lukaszraczylo/gohoarder/pkg/metadata"
+	"github.com/lukaszraczylo/gohoarder/pkg/uuid"
+	"github.com/rs/zerolog/log"
+)
+
+// ScannerName is the name of this scanner
+const ScannerName = "trivy"
+
+// Scanner implements the Scanner interface using Trivy
+type Scanner struct {
+	config config.TrivyConfig
+}
+
+// TrivyResult represents Trivy JSON output structure
+type TrivyResult struct {
+	SchemaVersion int                  `json:"SchemaVersion"`
+	ArtifactName  string               `json:"ArtifactName"`
+	ArtifactType  string               `json:"ArtifactType"`
+	Metadata      TrivyMetadata        `json:"Metadata"`
+	Results       []TrivyVulnResult    `json:"Results"`
+}
+
+type TrivyMetadata struct {
+	OS           *TrivyOS          `json:"OS,omitempty"`
+	RepoTags     []string          `json:"RepoTags,omitempty"`
+	RepoDigests  []string          `json:"RepoDigests,omitempty"`
+	ImageConfig  *TrivyImageConfig `json:"ImageConfig,omitempty"`
+}
+
+type TrivyOS struct {
+	Family string `json:"Family"`
+	Name   string `json:"Name"`
+}
+
+type TrivyImageConfig struct {
+	Architecture string `json:"architecture"`
+	Created      string `json:"created"`
+}
+
+type TrivyVulnResult struct {
+	Target          string               `json:"Target"`
+	Class           string               `json:"Class"`
+	Type            string               `json:"Type"`
+	Vulnerabilities []TrivyVulnerability `json:"Vulnerabilities"`
+}
+
+type TrivyVulnerability struct {
+	VulnerabilityID  string   `json:"VulnerabilityID"`
+	PkgName          string   `json:"PkgName"`
+	InstalledVersion string   `json:"InstalledVersion"`
+	FixedVersion     string   `json:"FixedVersion"`
+	Severity         string   `json:"Severity"`
+	Title            string   `json:"Title"`
+	Description      string   `json:"Description"`
+	References       []string `json:"References"`
+	PrimaryURL       string   `json:"PrimaryURL"`
+}
+
+// New creates a new Trivy scanner
+func New(cfg config.TrivyConfig) *Scanner {
+	return &Scanner{
+		config: cfg,
+	}
+}
+
+// Name returns the scanner name
+func (s *Scanner) Name() string {
+	return ScannerName
+}
+
+// UpdateDatabase updates Trivy's vulnerability database
+func (s *Scanner) UpdateDatabase(ctx context.Context) error {
+	log.Info().Msg("Updating Trivy vulnerability database")
+
+	cmd := exec.CommandContext(ctx, "trivy", "image", "--download-db-only")
+	if s.config.CacheDB != "" {
+		cmd.Env = append(os.Environ(), fmt.Sprintf("TRIVY_CACHE_DIR=%s", s.config.CacheDB))
+	}
+
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("failed to update Trivy database: %w (output: %s)", err, string(output))
+	}
+
+	log.Info().Msg("Trivy vulnerability database updated successfully")
+	return nil
+}
+
+// Scan scans a package for vulnerabilities using Trivy
+func (s *Scanner) Scan(ctx context.Context, registry, packageName, version string, filePath string) (*metadata.ScanResult, error) {
+	// Set timeout
+	if s.config.Timeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, s.config.Timeout)
+		defer cancel()
+	}
+
+	// Determine scan type based on registry
+	scanType := s.determineScanType(registry, filePath)
+
+	// Build Trivy command
+	args := []string{
+		scanType,
+		"--format", "json",
+		"--quiet",
+		filePath,
+	}
+
+	cmd := exec.CommandContext(ctx, "trivy", args...)
+
+	// Set cache directory if configured
+	if s.config.CacheDB != "" {
+		cmd.Env = append(os.Environ(), fmt.Sprintf("TRIVY_CACHE_DIR=%s", s.config.CacheDB))
+	}
+
+	// Execute scan
+	output, err := cmd.Output()
+	if err != nil {
+		// Check if it's a timeout
+		if ctx.Err() == context.DeadlineExceeded {
+			return &metadata.ScanResult{
+				ID:              uuid.New().String(),
+				Registry:        registry,
+				PackageName:     packageName,
+				PackageVersion:  version,
+				Scanner:         s.Name(),
+				ScannedAt:       time.Now(),
+				Status:          metadata.ScanStatusError,
+				Details: map[string]interface{}{
+					"error": "scan timeout",
+				},
+			}, nil
+		}
+
+		return nil, fmt.Errorf("trivy scan failed: %w", err)
+	}
+
+	// Parse Trivy output
+	var trivyResult TrivyResult
+	if err := json.Unmarshal(output, &trivyResult); err != nil {
+		return nil, fmt.Errorf("failed to parse Trivy output: %w", err)
+	}
+
+	// Convert to metadata.ScanResult
+	return s.convertTrivyResult(&trivyResult, registry, packageName, version), nil
+}
+
+// determineScanType determines the appropriate Trivy scan type
+func (s *Scanner) determineScanType(registry, filePath string) string {
+	// For now, use filesystem scan for packages
+	// Container image scanning would need different handling
+	ext := strings.ToLower(filePath[strings.LastIndex(filePath, ".")+1:])
+
+	switch registry {
+	case "npm":
+		return "fs" // Filesystem scan for npm packages
+	case "pypi":
+		return "fs" // Filesystem scan for Python packages
+	case "go":
+		return "fs" // Filesystem scan for Go modules
+	default:
+		// Check file extension
+		if ext == "tar" || ext == "tgz" || ext == "gz" {
+			return "fs"
+		}
+		return "fs"
+	}
+}
+
+// convertTrivyResult converts Trivy result to metadata.ScanResult
+func (s *Scanner) convertTrivyResult(trivyResult *TrivyResult, registry, packageName, version string) *metadata.ScanResult {
+	vulnerabilities := make([]metadata.Vulnerability, 0)
+	severityCounts := make(map[string]int)
+
+	// Aggregate all vulnerabilities from all results
+	for _, result := range trivyResult.Results {
+		for _, vuln := range result.Vulnerabilities {
+			// Count by severity
+			severityCounts[strings.ToUpper(vuln.Severity)]++
+
+			// Add to vulnerabilities list
+			vulnerabilities = append(vulnerabilities, metadata.Vulnerability{
+				ID:          vuln.VulnerabilityID,
+				Severity:    strings.ToUpper(vuln.Severity),
+				Title:       vuln.Title,
+				Description: vuln.Description,
+				References:  vuln.References,
+				FixedIn:     vuln.FixedVersion,
+			})
+		}
+	}
+
+	// Determine overall status
+	status := metadata.ScanStatusClean
+	if len(vulnerabilities) > 0 {
+		status = metadata.ScanStatusVulnerable
+	}
+
+	return &metadata.ScanResult{
+		ID:                 uuid.New().String(),
+		Registry:           registry,
+		PackageName:        packageName,
+		PackageVersion:     version,
+		Scanner:            s.Name(),
+		ScannedAt:          time.Now(),
+		Status:             status,
+		VulnerabilityCount: len(vulnerabilities),
+		Vulnerabilities:    vulnerabilities,
+		Details: map[string]interface{}{
+			"artifact_name": trivyResult.ArtifactName,
+			"artifact_type": trivyResult.ArtifactType,
+			"severity_counts": severityCounts,
+		},
+	}
+}
+
+// Health checks if Trivy is available and working
+func (s *Scanner) Health(ctx context.Context) error {
+	// Check if trivy command exists
+	cmd := exec.CommandContext(ctx, "trivy", "--version")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("trivy not available: %w (output: %s)", err, string(output))
+	}
+
+	log.Debug().Str("version", strings.TrimSpace(string(output))).Msg("Trivy health check passed")
+	return nil
+}