public static PartnerSyncMessage PrepareSignedMessage(byte[] data)
{
PartnerSyncMessage msg = new PartnerSyncMessage();
/* Provide certificate data */
msg.certId = CryptoEngine.GetInstance().Certificate.Cert.Id;
msg.cert = new byte[CryptoEngine.GetInstance().Certificate.Cert.Signature.ToByteArray().Length];
CryptoEngine.GetInstance().Certificate.Cert.Signature.ToByteArray().CopyTo(msg.cert, 0);
msg.key = CryptoEngine.GetInstance().Certificate.Keys.PublicKey.PublicKey.ToByteArray();
/* Copy data itself */
msg.data = data;
var dsa = CryptoEngine.GetInstance().ECLoad(CryptoEngine.GetInstance().Certificate.Keys.PublicKey.PublicKey.ToByteArray(), CryptoEngine.GetInstance().Certificate.Keys.PrivateKey.ToByteArray());
/* Sign the data */
msg.signature = dsa.SignData(data, HashAlgorithmName.SHA256);
return(msg);
}
public static void PartnerJoinRequest(PartnerSyncRequestJoin requestJoin)
{
/* Build the message */
var content = PreparePartnerSyncRequest(PartnerSyncMessageType.PARTNER_JOIN, JSONSerializer <PartnerSyncRequestJoin> .Serialize(requestJoin));
byte[] dbDump = null;
var newPartners = new List <string>();
/* Ask each of the participants to send its database version */
foreach (var partner in Partners)
{
var request = Request(partner);
try
{
JSONSerializer <PartnerSyncMessage> .Serialize(content, request.GetRequestStream()).Close();
}
catch (WebException)
{
/* Node might be down */
continue;
}
PartnerSyncMessage signedResponse;
try
{
/* Get the response */
signedResponse = JSONSerializer <PartnerSyncMessage> .Deserialize(request.GetResponse().GetResponseStream());
}
catch (SerializationException)
{
continue;
}
if (!CryptoEngine.GetInstance().verifyCertificate(signedResponse.key, signedResponse.certId, signedResponse.cert).VerifyData(signedResponse.data, signedResponse.signature))
{
/* Invalid response. Ignore. */
continue;
}
var response = JSONSerializer <PartnerSyncResponseDBDump> .Deserialize(JSONSerializer <PartnerSyncMessageData> .Deserialize(signedResponse.data).Data);
foreach (var newPartner in response.Partners)
{
if ((!Partners.Exists(s => s == newPartner)) && (newPartners.Exists(s => s == newPartner)) && (newPartner != Config <string> .GetInstance()["PUBLIC_ADDRESS"]) && (newPartner.StartsWith("http://") || newPartner.StartsWith("https://")))
{
newPartners.Add(newPartner);
}
}
/* Choose largest dump too sync with (TODO: Not sure it's the best idea) - Currently best-effort. */
if ((dbDump == null) || (dbDump.Length < response.DBDump.Length))
{
dbDump = response.DBDump;
}
}
if (dbDump != null)
{
/* Write DB To file */
var dbFile = File.Open(Config <string> .GetInstance()["DB_Filename"], FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
using (var writer = new BinaryWriter(dbFile))
{
writer.Write(dbDump);
}
}
/* Add additional partners */
foreach (var newPartner in newPartners)
{
Partners.Add(newPartner);
}
}
