/// <summary>
/// Check if a file is PEM formated.
/// </summary>
/// <param name="fileName">source file name.</param>
/// <returns>true:Yes, false:No.</returns>
public static bool IsPemFormatedFile(string fileName)
{
bool retval = false;
try
{
FileStream fs = new FileStream(fileName, System.IO.FileMode.Open);
byte[] data = new byte[fs.Length];
fs.Read(data, 0, data.Length);
fs.Close();
string dataStr = Asn1Util.BytesToString(data);
retval = IsPemFormated(dataStr);
}
catch
{
retval = false;
}
return(retval);
}
/// <summary>
/// Load PEM formated file.
/// </summary>
/// <param name="fileName">PEM file name.</param>
public void LoadPemData(string fileName)
{
FileStream fs = new FileStream(fileName, FileMode.Open);
byte[] data = new byte[fs.Length];
fs.Read(data, 0, data.Length);
fs.Close();
string dataStr = Asn1Util.BytesToString(data);
if (Asn1Util.IsPemFormated(dataStr))
{
Stream ms = Asn1Util.PemToStream(dataStr);
ms.Position = 0;
LoadData(ms);
}
else
{
throw new Exception("It is a invalid PEM file: " + fileName);
}
}