/// <summary>
/// ValidateKey method implementation
/// </summary>
public override bool ValidateKey(string upn)
{
if (string.IsNullOrEmpty(upn))
{
return(false);
}
string lupn = upn.ToLower();
string key = ReadKey(lupn);
if (HasStorageInfos(key))
{
using (var prov = new RNGEncryption(_xorsecret, _mode))
{
byte[] crypted = StripStorageInfos(ReadKey(lupn));
if (crypted == null)
{
return(false);
}
byte[] cleared = prov.Decrypt(crypted, lupn);
if (cleared == null)
{
return(false); // Key corrupted
}
if (prov.CheckSum == null)
{
return(false); // Key corrupted
}
if (prov.CheckSum.SequenceEqual(CheckSumEncoding.CheckSum(lupn)))
{
return(true); // OK RSA
}
else
{
return(false); // Key corrupted
}
}
}
else
{
return(false);
}
}
/// <summary>
/// EncodedKey method implementation
/// </summary>
public override string EncodedKey(string upn)
{
if (string.IsNullOrEmpty(upn))
{
return(null);
}
string lupn = upn.ToLower();
string key = ReadKey(lupn);
if (string.IsNullOrEmpty(key))
{
return(null);
}
byte[] cleared = null;
using (var prov = new RNGEncryption(_xorsecret, _mode))
{
byte[] crypted = StripStorageInfos(key);
if (crypted == null)
{
return(null);
}
cleared = prov.Decrypt(crypted, lupn);
if (cleared == null)
{
return(null);
}
}
if (cleared.Length > MAX_PROBE_LEN)
{
byte[] buffer = new byte[MAX_PROBE_LEN];
Buffer.BlockCopy(cleared, 0, buffer, 0, MAX_PROBE_LEN);
return(Base32.Encode(buffer));
}
else
{
return(Base32.Encode(cleared));
}
}