sync

cmd/decode-token/main.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println("Usage: decode-token <jwt-token>")
+		os.Exit(1)
+	}
+
+	token := os.Args[1]
+	parts := strings.Split(token, ".")
+	
+	if len(parts) != 3 {
+		fmt.Println("Invalid JWT token format")
+		os.Exit(1)
+	}
+
+	// Decode header
+	fmt.Println("=== JWT HEADER ===")
+	headerBytes, err := base64.RawStdEncoding.DecodeString(parts[0])
+	if err != nil {
+		fmt.Printf("Failed to decode header: %v\n", err)
+		os.Exit(1)
+	}
+	
+	var header map[string]interface{}
+	if err := json.Unmarshal(headerBytes, &header); err != nil {
+		fmt.Printf("Failed to parse header: %v\n", err)
+		os.Exit(1)
+	}
+	
+	headerJSON, _ := json.MarshalIndent(header, "", "  ")
+	fmt.Println(string(headerJSON))
+
+	// Decode payload
+	fmt.Println("\n=== JWT PAYLOAD (CLAIMS) ===")
+	payloadBytes, err := base64.RawStdEncoding.DecodeString(parts[1])
+	if err != nil {
+		fmt.Printf("Failed to decode payload: %v\n", err)
+		os.Exit(1)
+	}
+	
+	var payload map[string]interface{}
+	if err := json.Unmarshal(payloadBytes, &payload); err != nil {
+		fmt.Printf("Failed to parse payload: %v\n", err)
+		os.Exit(1)
+	}
+	
+	payloadJSON, _ := json.MarshalIndent(payload, "", "  ")
+	fmt.Println(string(payloadJSON))
+	
+	fmt.Println("\n=== KEY FIELDS ===")
+	if sub, ok := payload["sub"].(string); ok {
+		fmt.Printf("User ID (sub): %s\n", sub)
+	}
+	if typ, ok := payload["typ"].(string); ok {
+		fmt.Printf("Token Type (typ): %s\n", typ)
+	}
+	if aud, ok := payload["aud"].(string); ok {
+		fmt.Printf("Audience (aud): %s\n", aud)
+	}
+	if exp, ok := payload["exp"].(float64); ok {
+		fmt.Printf("Expires (exp): %v\n", exp)
+	}
+	if iat, ok := payload["iat"].(float64); ok {
+		fmt.Printf("Issued At (iat): %v\n", iat)
+	}
+	
+	// Check for user profile fields
+	fmt.Println("\n=== USER PROFILE FIELDS ===")
+	hasProfile := false
+	for key, value := range payload {
+		if strings.Contains(strings.ToLower(key), "name") || 
+		   strings.Contains(strings.ToLower(key), "user") ||
+		   strings.Contains(strings.ToLower(key), "display") ||
+		   strings.Contains(strings.ToLower(key), "email") {
+			fmt.Printf("%s: %v\n", key, value)
+			hasProfile = true
+		}
+	}
+	if !hasProfile {
+		fmt.Println("(No user profile fields found in token)")
+	}
+}
+