public static Pair<IV, int> extractIVFromContent(BufferReference content)
{
if (content.Length < 1 || content.Length < content[0] + 1)
throw new InternalError("Failed to extract IV from encrypted block.");
var ivBytes = content[0];
var iv = new byte[content[0]];
content.copy(1, iv, 0, ivBytes);
return Pair.make(new IV(iv), 1 + ivBytes);
}
