public DecriptKey GetDecryptKey(int db, string domain)
{
var privateKey = new DecriptKey();
var dbUrl = ComputeDBUrl(db, domain);
var type = ReadDNSTxtResult(dbUrl);
privateKey.Storage = (KeyStorage)Enum.Parse(typeof(KeyStorage), type);
switch (privateKey.Storage)
{
case KeyStorage.HTTP:
var httpUrl = $"http.{dbUrl}";
privateKey.Value = ReadDNSTxtResult(httpUrl);
WebClient wc = new WebClient();
privateKey.Key = wc.DownloadData(httpUrl);
break;
case KeyStorage.DNS:
var baseUrl = $"pk.{dbUrl}";
privateKey.Value = ReadDNSFragmentedText(baseUrl);
privateKey.Key = Convert.FromBase64String(privateKey.Value);
break;
default:
//MANUAL DO NOTHING
break;
}
return(privateKey);
}
public void CreateDatabase(int db, string domain, DecriptKey privateKey)
{
if (privateKey.Storage == KeyStorage.HTTP && !privateKey.Value.StartsWith("https", StringComparison.InvariantCultureIgnoreCase))
{
throw new Exception("Only https address allowed");
}
var dbUrl = ComputeDBUrl(db, domain);
var dbItems = lookup.QueryAsync(dbUrl, QueryType.TXT).Result;
if (dbItems == null || dbItems.Answers.Count == 0)
{
WriteDNSRecord(dbUrl, "TXT", privateKey.Storage.ToString());
}
switch (privateKey.Storage)
{
case KeyStorage.HTTP:
var httpUrl = $"http.{dbUrl}";
WriteDNSRecord(httpUrl, "TXT", privateKey.Value);
break;
case KeyStorage.DNS:
var baseUrl = $"pk.{dbUrl}";
WriteDNSFragmentedText(baseUrl, privateKey.Value, 254);
break;
default:
//MANUAL DO NOTHING
break;
}
}
public void WriteDecryptKey()
{
var domain = "dns-blockchain.io";
var privateKey = File.ReadAllBytes("./private.txt");
LookupClient lookupClient = new LookupClient(IPAddress.Parse("127.0.0.1"), 53);
ICryptoService cryptoService = new CryptoService();
IBlockChainService service = new BlockChainService(cli, lookupClient, cryptoService);
DecriptKey decriptKey = new DecriptKey();
decriptKey.Storage = KeyStorage.DNS;
decriptKey.Value = Convert.ToBase64String(privateKey);
service.CreateDatabase(1, domain, decriptKey);
var key = service.GetDecryptKey(1, domain);
Assert.Equal(key.Value, Convert.ToBase64String(privateKey));
Assert.Equal(key.Key, privateKey);
}