/// <summary>
/// Load keys from keytab file.
/// </summary>
/// <param name="filename">Filename</param>
public void LoadKeytab(string filename)
{
FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);
byte[] buf = new byte[fs.Length];
fs.Read(buf, 0, (int)fs.Length);
Keytab kt = Keytab.Decode(buf);
foreach (var entry in kt.entries)
{
string principal = entry.Components[0].ToString() +
(entry.NumComponents > 1 ? ("/" + entry.Components[1].ToString()) : "");
KeytabItem item = new KeytabItem()
{
Principal = principal,
Realm = entry.Realm.ToString(),
Kvno = entry.Kvno,
KeyType = (EncryptionType)entry.Key.type,
Key = new EncryptionKey(new KerbInt32((long)entry.Key.type), new Asn1OctetString(entry.Key.Data.Data))
};
keytabItems.Add(item);
// For Windows keytab compatibility
// Computer name is used instead of service principal name in Windows AD database.
// Add cifs SPN manually when encountering computer name.
if (principal.EndsWith("$"))
{
string cifsPrincipal = string.Format("cifs/{0}.{1}", principal.Remove(principal.Length - 1).ToLower(), entry.Realm.ToString().ToLower());
item = new KeytabItem()
{
Principal = cifsPrincipal,
Realm = entry.Realm.ToString(),
Kvno = entry.Kvno,
KeyType = (EncryptionType)entry.Key.type,
Key = new EncryptionKey(new KerbInt32((long)entry.Key.type), new Asn1OctetString(entry.Key.Data.Data))
};
keytabItems.Add(item);
}
}
fs.Close();
}
public static Keytab Decode(byte[] buffer)
{
List <KeytabEntry> entryList = new List <KeytabEntry>();
KeytabDecodeBuffer decodeBuffer = new KeytabDecodeBuffer(buffer);
Keytab keytab = new Keytab
{
FormatVersion = decodeBuffer.DecodeUInt16(),
entries = new KeytabEntry[1]
};
while (!decodeBuffer.EOS)
{
entryList.Add(KeytabEntry.Decode(decodeBuffer, keytab.FormatVersion));
}
keytab.entries = new KeytabEntry[entryList.Count];
for (int i = 0; i < entryList.Count; i++)
{
keytab.entries[i] = entryList[i];
}
return(keytab);
}
public static Keytab Decode(byte[] buffer)
{
List<KeytabEntry> entryList = new List<KeytabEntry>();
KeytabDecodeBuffer decodeBuffer = new KeytabDecodeBuffer(buffer);
Keytab keytab = new Keytab
{
FormatVersion = decodeBuffer.DecodeUInt16(),
entries = new KeytabEntry[1]
};
while (!decodeBuffer.EOS)
{
entryList.Add(KeytabEntry.Decode(decodeBuffer, keytab.FormatVersion));
}
keytab.entries = new KeytabEntry[entryList.Count];
for (int i = 0; i < entryList.Count; i++)
{
keytab.entries[i] = entryList[i];
}
return keytab;
}