static IPrivateKey DecodePrivateKey(string fname)
{
byte[] buf = File.ReadAllBytes(fname);
PEMObject[] fpo = AsnIO.DecodePEM(buf);
if (fpo.Length == 0)
{
buf = AsnIO.FindBER(buf);
}
else
{
buf = null;
foreach (PEMObject po in fpo)
{
string tt = po.type.ToUpperInvariant();
if (tt.IndexOf("PRIVATE KEY") >= 0)
{
if (buf != null)
{
throw new Exception(
"Multiple keys in '"
+ fname + "'");
}
buf = po.data;
}
}
}
if (buf == null)
{
throw new Exception(string.Format(
"No private key in file '{0}'", fname));
}
return(KF.DecodePrivateKey(buf));
}