public static string ToBase64String(this byte[] bytes, Base64Options options = Base64Options.Default)
{
if (bytes?.Length == 0)
{
return(string.Empty);
}
var s = Convert.ToBase64String(bytes);
if (options.HasFlag(Base64Options.NoPadding) || options.HasFlag(Base64Options.UrlSafe))
{
var idx = s.IndexOf('=');
if (idx > 0)
{
s = s.Substring(0, idx);
}
}
if (options.HasFlag(Base64Options.UrlSafe))
{
s = s.Replace('/', '_').Replace('+', '-');
}
return(s);
}
public static byte[] AsBytesFromBase64(this string s, Base64Options options = Base64Options.Default)
{
if (string.IsNullOrEmpty(s))
{
return(Array.Empty <byte>());
}
if (options == Base64Options.Default)
{
return(Convert.FromBase64String(s));
}
if (options.HasFlag(Base64Options.NoPadding) || options.HasFlag(Base64Options.UrlSafe))
{
switch (s.Length % 4)
{
case 2:
s += "==";
break;
case 3:
s += "=";
break;
}
}
if (options.HasFlag(Base64Options.UrlSafe))
{
s = s.Replace('_', '/').Replace('-', '+');
}
return(Convert.FromBase64String(s));
}
