public static SignatureMessage FromSignatureMessageBlock(ArraySegment <byte> message, IExchangeDecrypt privateKey)
{
if (message.Array == null)
{
throw new ArgumentNullException("message.Array");
}
if (privateKey == null)
{
throw new ArgumentNullException("privateKey");
}
try
{
using (Stream typeStream = new MemoryStream(message.Array, message.Offset, message.Count))
using (Stream cryptoStream = ContentConverter.RemoveType(typeStream, "SignatureMessage"))
using (Stream hashStream = ContentConverter.Decrypt(cryptoStream, privateKey))
using (Stream paddingStream = ContentConverter.RemoveHash(hashStream))
using (Stream compressStream = ContentConverter.RemovePadding(paddingStream))
using (Stream messageStream = ContentConverter.Decompress(compressStream))
{
return(SignatureMessage.Import(messageStream, _bufferManager));
}
}
catch (Exception)
{
return(null);
}
}
public static ArraySegment <byte> ToSignatureMessageBlock(SignatureMessage message, IExchangeEncrypt publicKey)
{
if (message == null)
{
throw new ArgumentNullException("message");
}
if (publicKey == null)
{
throw new ArgumentNullException("publicKey");
}
ArraySegment <byte> value;
using (Stream messageStream = message.Export(_bufferManager))
using (Stream compressStream = ContentConverter.Compress(messageStream))
using (Stream paddingStream = ContentConverter.AddPadding(compressStream, 1024 * 256))
using (Stream hashStream = ContentConverter.AddHash(paddingStream))
using (Stream cryptostream = ContentConverter.Encrypt(hashStream, publicKey))
using (Stream typeStream = ContentConverter.AddType(cryptostream, "SignatureMessage"))
{
value = new ArraySegment <byte>(_bufferManager.TakeBuffer((int)typeStream.Length), 0, (int)typeStream.Length);
typeStream.Read(value.Array, value.Offset, value.Count);
}
return(value);
}
public SignatureMessage GetMessage(SignatureMessageMetadata metadata, ExchangePrivateKey exchangePrivateKey)
{
if (metadata == null)
{
throw new ArgumentNullException("metadata");
}
if (exchangePrivateKey == null)
{
throw new ArgumentNullException("exchangePrivateKey");
}
lock (this.ThisLock)
{
if (!_cacheManager.Contains(metadata.Key))
{
_connectionsManager.Download(metadata.Key);
return(null);
}
else
{
ArraySegment <byte> buffer = new ArraySegment <byte>();
try
{
buffer = _cacheManager[metadata.Key];
var message = ContentConverter.FromSignatureMessageBlock(buffer, exchangePrivateKey);
if (metadata.Signature != message.Signature ||
metadata.CreationTime != message.CreationTime ||
metadata.Certificate.ToString() != message.Certificate.ToString())
{
return(null);
}
this.Lock(metadata.Key);
return(message);
}
catch (Exception)
{
}
finally
{
if (buffer.Array != null)
{
_bufferManager.ReturnBuffer(buffer.Array);
}
}
return(null);
}
}
}
public ChatTopic GetMessage(ChatTopicMetadata metadata)
{
if (metadata == null)
{
throw new ArgumentNullException("metadata");
}
lock (this.ThisLock)
{
if (!_cacheManager.Contains(metadata.Key))
{
_connectionsManager.Download(metadata.Key);
return(null);
}
else
{
ArraySegment <byte> buffer = new ArraySegment <byte>();
try
{
buffer = _cacheManager[metadata.Key];
var message = ContentConverter.FromChatTopicBlock(buffer);
if (metadata.Tag != message.Tag ||
metadata.CreationTime != message.CreationTime ||
metadata.Certificate.ToString() != message.Certificate.ToString())
{
return(null);
}
this.Lock(metadata.Key);
return(message);
}
catch (Exception)
{
}
finally
{
if (buffer.Array != null)
{
_bufferManager.ReturnBuffer(buffer.Array);
}
}
return(null);
}
}
}
public static ArraySegment <byte> ToChatMessageBlock(ChatMessage message)
{
if (message == null)
{
throw new ArgumentNullException("message");
}
ArraySegment <byte> value;
using (Stream messageStream = message.Export(_bufferManager))
using (Stream compressStream = ContentConverter.Compress(messageStream))
using (Stream typeStream = ContentConverter.AddType(compressStream, "ChatMessage"))
{
value = new ArraySegment <byte>(_bufferManager.TakeBuffer((int)typeStream.Length), 0, (int)typeStream.Length);
typeStream.Read(value.Array, value.Offset, value.Count);
}
return(value);
}
public static ChatMessage FromChatMessageBlock(ArraySegment <byte> message)
{
if (message.Array == null)
{
throw new ArgumentNullException("message.Array");
}
try
{
using (Stream typeStream = new MemoryStream(message.Array, message.Offset, message.Count))
using (Stream compressStream = ContentConverter.RemoveType(typeStream, "ChatMessage"))
using (Stream messageStream = ContentConverter.Decompress(compressStream))
{
return(ChatMessage.Import(messageStream, _bufferManager));
}
}
catch (Exception)
{
return(null);
}
}
private void UploadThread()
{
for (; ;)
{
Thread.Sleep(1000 * 1);
if (this.State == ManagerState.Stop)
{
return;
}
{
UploadItem item = null;
lock (this.ThisLock)
{
if (_settings.UploadItems.Count > 0)
{
item = _settings.UploadItems[0];
}
}
try
{
if (item != null)
{
ArraySegment <byte> buffer = new ArraySegment <byte>();
try
{
if (item.Type == "Profile")
{
buffer = ContentConverter.ToProfileBlock(item.Profile);
}
else if (item.Type == "SignatureMessage")
{
buffer = ContentConverter.ToSignatureMessageBlock(item.SignatureMessage, item.ExchangePublicKey);
}
else if (item.Type == "WikiDocument")
{
buffer = ContentConverter.ToWikiDocumentBlock(item.WikiDocument);
}
else if (item.Type == "ChatTopic")
{
buffer = ContentConverter.ToChatTopicBlock(item.ChatTopic);
}
else if (item.Type == "ChatMessage")
{
buffer = ContentConverter.ToChatMessageBlock(item.ChatMessage);
}
Key key = null;
{
if (_hashAlgorithm == HashAlgorithm.Sha256)
{
key = new Key(Sha256.ComputeHash(buffer), _hashAlgorithm);
}
this.Lock(key);
}
_cacheManager[key] = buffer;
_connectionsManager.Upload(key);
var miner = new Miner(CashAlgorithm.Version1, item.MiningLimit, item.MiningTime);
var task = Task.Factory.StartNew(() =>
{
if (item.Type == "Profile")
{
var metadata = new ProfileMetadata(item.Profile.CreationTime, key, item.DigitalSignature);
_connectionsManager.Upload(metadata);
}
else if (item.Type == "SignatureMessage")
{
var metadata = new SignatureMessageMetadata(item.SignatureMessage.Signature, item.SignatureMessage.CreationTime, key, miner, item.DigitalSignature);
_connectionsManager.Upload(metadata);
}
else if (item.Type == "WikiDocument")
{
var metadata = new WikiDocumentMetadata(item.WikiDocument.Tag, item.WikiDocument.CreationTime, key, miner, item.DigitalSignature);
_connectionsManager.Upload(metadata);
}
else if (item.Type == "ChatTopic")
{
var metadata = new ChatTopicMetadata(item.ChatTopic.Tag, item.ChatTopic.CreationTime, key, miner, item.DigitalSignature);
_connectionsManager.Upload(metadata);
}
else if (item.Type == "ChatMessage")
{
var metadata = new ChatMessageMetadata(item.ChatMessage.Tag, item.ChatMessage.CreationTime, key, miner, item.DigitalSignature);
_connectionsManager.Upload(metadata);
}
});
while (!task.IsCompleted)
{
if (this.State == ManagerState.Stop)
{
miner.Cancel();
}
lock (this.ThisLock)
{
if (!_settings.UploadItems.Contains(item))
{
miner.Cancel();
}
}
Thread.Sleep(1000);
}
if (task.Exception != null)
{
throw task.Exception;
}
lock (this.ThisLock)
{
_settings.UploadItems.Remove(item);
}
}
finally
{
if (buffer.Array != null)
{
_bufferManager.ReturnBuffer(buffer.Array);
}
}
}
}
catch (Exception)
{
}
}
}
}
