feat(auth): integrate portal JWT for enhanced authentication and authorization

Added support for portal JWT authentication, enabling single sign-on (SSO) capabilities. Updated the application to handle JWT claims for user permissions and roles, enhancing security and access control. Refactored relevant components and API routes to accommodate the new authentication flow, ensuring a seamless user experience. Updated documentation to reflect the new authentication requirements and configurations.

Co-authored-by: Cursor <[email protected]>

internal/httpapi/auth.go

@@ -6,18 +6,32 @@ import (
 	"strings"
 
 	"evobgp/internal/authkey"
+
+	"github.com/golang-jwt/jwt/v5"
 )
 
 type ctxKey int
 
 const authCtxKey ctxKey = 1
 
+// Auth kinds distinguish API key sessions from portal JWT sessions.
+const (
+	AuthKindAPIKey = "apikey"
+	AuthKindJWT    = "jwt"
+)
+
 // Auth holds resolved API identity for a request.
 type Auth struct {
 	TenantID string
-	Role     string // viewer, editor, operator, node
+	Role     string // viewer, editor, operator, node, firewall (apikeys only)
 	Token    string
 	APIKeyID string // non-empty for DB-managed keys
+	// Portal / dual-auth fields (empty for API keys unless noted).
+	Kind        string   // "apikey" | "jwt"
+	UserID      string   // JWT sub
+	Email       string   // JWT email claim
+	Permissions []string // JWT permissions claim (bgp:*)
+	IsAdmin     bool     // JWT is_admin claim
 }
 
 func authFromContext(ctx context.Context) (Auth, bool) {
@@ -56,6 +70,23 @@ func parseAPIKeysSpec(spec string) []apiKeyRecord {
 	return out
 }
 
+// looksLikeJWT reports whether raw is a compact JWS (three dot-separated segments, non-empty).
+func looksLikeJWT(raw string) bool {
+	if raw == "" {
+		return false
+	}
+	parts := strings.Split(raw, ".")
+	if len(parts) != 3 {
+		return false
+	}
+	for _, p := range parts {
+		if strings.TrimSpace(p) == "" {
+			return false
+		}
+	}
+	return true
+}
+
 func (s *Server) authMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		h := r.Header.Get("Authorization")
@@ -65,6 +96,16 @@ func (s *Server) authMiddleware(next http.Handler) http.Handler {
 			return
 		}
 		raw := strings.TrimSpace(strings.TrimPrefix(h, p))
+		if looksLikeJWT(raw) && strings.TrimSpace(s.jwtSecret) != "" {
+			a, status, msg, ok := s.resolveJWT(raw)
+			if !ok {
+				writeProblem(w, status, http.StatusText(status), msg)
+				return
+			}
+			r = r.WithContext(context.WithValue(r.Context(), authCtxKey, a))
+			next.ServeHTTP(w, r)
+			return
+		}
 		a, ok := s.resolveAuth(raw)
 		if !ok {
 			writeProblem(w, http.StatusUnauthorized, "Unauthorized", "unknown api key")
@@ -79,10 +120,16 @@ func (s *Server) authMiddleware(next http.Handler) http.Handler {
 }
 
 func authFromKeyRecord(raw string, rec apiKeyRecord) Auth {
-	return Auth{TenantID: rec.tenantID, Role: rec.role, Token: raw, APIKeyID: rec.keyID}
+	return Auth{
+		Kind:     AuthKindAPIKey,
+		TenantID: rec.tenantID,
+		Role:     rec.role,
+		Token:    raw,
+		APIKeyID: rec.keyID,
+	}
 }
 
-// resolveAuth maps a bearer token to tenant identity.
+// resolveAuth maps a bearer token to tenant identity (API key path).
 // For the literal token "dev", the demo shortcut (devAuth) takes precedence when demo-seed
 // is available; env/DB mapping is used only when demo tenant is absent.
 func (s *Server) resolveAuth(raw string) (Auth, bool) {
@@ -99,23 +146,96 @@ func (s *Server) resolveAuth(raw string) (Auth, bool) {
 	if !ok {
 		if s.firewallResolver != nil {
 			if fw, ok := s.firewallResolver.Lookup(raw); ok {
-				return Auth{TenantID: fw.tenantID, Role: "firewall", Token: raw, APIKeyID: fw.clientID}, true
+				return Auth{Kind: AuthKindAPIKey, TenantID: fw.tenantID, Role: "firewall", Token: raw, APIKeyID: fw.clientID}, true
 			}
 		}
 		if client, err := s.store.LookupFirewallClientByTokenHash(authkey.HashToken(raw)); err == nil {
-			return Auth{TenantID: client.TenantID, Role: "firewall", Token: raw, APIKeyID: client.ID}, true
+			return Auth{Kind: AuthKindAPIKey, TenantID: client.TenantID, Role: "firewall", Token: raw, APIKeyID: client.ID}, true
 		}
 		return Auth{}, false
 	}
 	return authFromKeyRecord(raw, rec), true
 }
 
+// resolveJWT parses and validates a portal HS256 token, returning an Auth on success.
+// Returns (auth, status, detail, ok). status/detail are used when ok=false.
+func (s *Server) resolveJWT(raw string) (Auth, int, string, bool) {
+	if strings.TrimSpace(s.portalTenantID) == "" {
+		return Auth{}, http.StatusServiceUnavailable, "portal tenant not configured (EVOBGP_PORTAL_TENANT_ID)", false
+	}
+	tok, err := jwt.Parse(raw, func(t *jwt.Token) (any, error) {
+		if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, jwt.ErrSignatureInvalid
+		}
+		return []byte(s.jwtSecret), nil
+	}, jwt.WithValidMethods([]string{jwt.SigningMethodHS256.Alg()}))
+	if err != nil || tok == nil || !tok.Valid {
+		return Auth{}, http.StatusUnauthorized, "invalid jwt", false
+	}
+	claims, ok := tok.Claims.(jwt.MapClaims)
+	if !ok {
+		return Auth{}, http.StatusUnauthorized, "invalid jwt claims", false
+	}
+	if iss := strings.TrimSpace(s.authIssuer); iss != "" {
+		got, _ := claims["iss"].(string)
+		if strings.TrimSpace(got) != iss {
+			return Auth{}, http.StatusUnauthorized, "jwt issuer mismatch", false
+		}
+	}
+	apps := coerceStringSlice(claims["apps"])
+	if !containsFold(apps, "bgp") {
+		return Auth{}, http.StatusForbidden, "jwt does not grant access to bgp app", false
+	}
+	sub, _ := claims["sub"].(string)
+	if strings.TrimSpace(sub) == "" {
+		return Auth{}, http.StatusUnauthorized, "jwt missing sub", false
+	}
+	email, _ := claims["email"].(string)
+	perms := coerceStringSlice(claims["permissions"])
+	isAdmin, _ := claims["is_admin"].(bool)
+	return Auth{
+		Kind:        AuthKindJWT,
+		TenantID:    s.portalTenantID,
+		UserID:      strings.TrimSpace(sub),
+		Email:       strings.TrimSpace(email),
+		Permissions: perms,
+		IsAdmin:     isAdmin,
+		Token:       raw,
+	}, 0, "", true
+}
+
+func coerceStringSlice(v any) []string {
+	switch t := v.(type) {
+	case []string:
+		return t
+	case []any:
+		out := make([]string, 0, len(t))
+		for _, x := range t {
+			if s, ok := x.(string); ok {
+				out = append(out, s)
+			}
+		}
+		return out
+	default:
+		return nil
+	}
+}
+
+func containsFold(items []string, needle string) bool {
+	for _, x := range items {
+		if strings.EqualFold(strings.TrimSpace(x), needle) {
+			return true
+		}
+	}
+	return false
+}
+
 func (s *Server) devAuth() (Auth, bool) {
 	tid, _, _, _, _ := s.store.DemoIDs()
 	if tid == "" {
 		return Auth{}, false
 	}
-	return Auth{TenantID: tid, Role: "operator", Token: "dev"}, true
+	return Auth{Kind: AuthKindAPIKey, TenantID: tid, Role: "operator", Token: "dev"}, true
 }
 
 func roleLevel(role string) int {
@@ -131,7 +251,8 @@ func roleLevel(role string) int {
 	}
 }
 
-// requireAtLeast rejects node role and enforces viewer/editor/operator ladder.
+// requireAtLeast rejects node/firewall roles and enforces viewer/editor/operator ladder for API keys.
+// New code should call requirePerm which supports JWT permissions in addition to API-key roles.
 func (s *Server) requireAtLeast(w http.ResponseWriter, a Auth, need string) bool {
 	if strings.ToLower(a.Role) == "node" {
 		writeProblem(w, http.StatusForbidden, "Forbidden", "node role cannot access this resource")