feat: add example

utils/encrypt.go

@@ -0,0 +1,43 @@
+package utils
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/hex"
+	"fmt"
+)
+
+func GenerateHMACKey(length int) (string, error) {
+	key := make([]byte, length)
+	_, err := rand.Read(key)
+	if err != nil {
+		return "", fmt.Errorf("failed to generate random key: %v", err)
+	}
+	return hex.EncodeToString(key), nil
+}
+
+func MustGenerateHMACKey(length int) string {
+	key, err := GenerateHMACKey(length)
+	if err != nil {
+		panic(err)
+	}
+	return key
+}
+
+func GenerateSecretKey(length int) (string, error) {
+	key := make([]byte, length)
+	_, err := rand.Read(key)
+	if err != nil {
+		return "", err
+	}
+	secretKey := base64.StdEncoding.EncodeToString(key)
+	return secretKey[:length], nil
+}
+
+func MustGenerateSecretKey(length int) string {
+	key, err := GenerateSecretKey(length)
+	if err != nil {
+		panic(err)
+	}
+	return key
+}