package cryptography

import (
	"encoding/base64"
	"strings"
)

func IsBase64Std(s string) bool {
	if s == "" {
		return false
	}

	s = strings.TrimSpace(s)
	if len(s)%4 != 0 {
		return false
	}

	_, err := base64.StdEncoding.Strict().DecodeString(s)
	return err == nil
}