/// <summary>
/// Create a folder on the filesytem
/// </summary>
/// <param name="name">Folder name</param>
/// <param name="parent">Parent node to attach created folder</param>
/// <exception cref="NotSupportedException">Not logged in</exception>
/// <exception cref="ApiException">Mega.co.nz service reports an error</exception>
/// <exception cref="ArgumentNullException">name or parent is null</exception>
/// <exception cref="ArgumentException">parent is not valid (all types are allowed expect <see cref="NodeType.File" />)</exception>
public INode CreateFolder(string name, INode parent)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
if (parent == null)
{
throw new ArgumentNullException("parent");
}
if (parent.Type == NodeType.File)
{
throw new ArgumentException("Invalid parent node");
}
this.EnsureLoggedIn();
byte[] key = Crypto.CreateAesKey();
byte[] attributes = Crypto.EncryptAttributes(new Attributes(name), key);
byte[] encryptedKey = Crypto.EncryptAes(key, this.masterKey);
CreateNodeRequest request = CreateNodeRequest.CreateFolderNodeRequest(parent, attributes.ToBase64(), encryptedKey.ToBase64(), key);
GetNodesResponse response = this.Request <GetNodesResponse>(request, this.masterKey);
return(response.Nodes[0]);
}
/// <summary>
/// Retrieve all filesystem nodes
/// </summary>
/// <returns>Flat representation of all the filesystem nodes</returns>
/// <exception cref="NotSupportedException">Not logged in</exception>
/// <exception cref="ApiException">Mega.co.nz service reports an error</exception>
public IEnumerable <INode> GetNodes()
{
this.EnsureLoggedIn();
GetNodesRequest request = new GetNodesRequest();
GetNodesResponse response = this.Request <GetNodesResponse>(request, this.masterKey);
Node[] nodes = response.Nodes;
if (this.trashNode == null)
{
this.trashNode = nodes.First(n => n.Type == NodeType.Trash);
}
this.Nodes = nodes.Distinct().Cast <INode>();
return(this.Nodes);
}
public INode CommitUpload(string Name, INode parent, MegaAesCtrStreamCrypter encryptedStream, string completionHandle)
{
byte[] cryptedAttributes = Crypto.EncryptAttributes(new Attributes(Name), encryptedStream.FileKey);
byte[] fileKey = new byte[32];
for (int i = 0; i < 8; i++)
{
fileKey[i] = (byte)(encryptedStream.FileKey[i] ^ encryptedStream.Iv[i]);
fileKey[i + 16] = encryptedStream.Iv[i];
}
for (int i = 8; i < 16; i++)
{
fileKey[i] = (byte)(encryptedStream.FileKey[i] ^ encryptedStream.MetaMac[i - 8]);
fileKey[i + 16] = encryptedStream.MetaMac[i - 8];
}
byte[] encryptedKey = Crypto.EncryptKey(fileKey, this.masterKey);
CreateNodeRequest createNodeRequest = CreateNodeRequest.CreateFileNodeRequest(parent, cryptedAttributes.ToBase64(), encryptedKey.ToBase64(), fileKey, completionHandle);
GetNodesResponse createNodeResponse = this.Request <GetNodesResponse>(createNodeRequest, this.masterKey);
return(createNodeResponse.Nodes[0]);
}
public void OnDeserialized(StreamingContext ctx)
{
object[] context = (object[])ctx.Context;
GetNodesResponse nodesResponse = (GetNodesResponse)context[0];
if (context.Length == 1)
{
// Add key from incoming sharing.
if (this.SharingKey != null && nodesResponse.SharedKeys.Any(x => x.Id == this.Id) == false)
{
nodesResponse.SharedKeys.Add(new SharedKey(this.Id, this.SharingKey));
}
return;
}
else
{
byte[] masterKey = (byte[])context[1];
this.LastModificationDate = OriginalDateTime.AddSeconds(this.SerializedLastModificationDate).ToLocalTime();
if (this.Type == NodeType.File || this.Type == NodeType.Directory)
{
// There are cases where the SerializedKey property contains multiple keys separated with /
// This can occur when a folder is shared and the parent is shared too.
// Both keys are working so we use the first one
string serializedKey = this.SerializedKey.Split('/')[0];
int splitPosition = serializedKey.IndexOf(":", StringComparison.InvariantCulture);
byte[] encryptedKey = serializedKey.Substring(splitPosition + 1).FromBase64();
// If node is shared, we need to retrieve shared masterkey
if (nodesResponse.SharedKeys != null)
{
string handle = serializedKey.Substring(0, splitPosition);
SharedKey sharedKey = nodesResponse.SharedKeys.FirstOrDefault(x => x.Id == handle);
if (sharedKey != null)
{
masterKey = Crypto.DecryptKey(sharedKey.Key.FromBase64(), masterKey);
if (this.Type == NodeType.Directory)
{
this.SharedKey = masterKey;
}
else
{
this.SharedKey = Crypto.DecryptKey(encryptedKey, masterKey);
}
}
}
this.FullKey = Crypto.DecryptKey(encryptedKey, masterKey);
if (this.Type == NodeType.File)
{
byte[] iv, metaMac, fileKey;
Crypto.GetPartsFromDecryptedKey(this.FullKey, out iv, out metaMac, out fileKey);
this.Iv = iv;
this.MetaMac = metaMac;
this.Key = fileKey;
}
else
{
this.Key = this.FullKey;
}
Attributes attributes = Crypto.DecryptAttributes(this.SerializedAttributes.FromBase64(), this.Key);
this.Name = attributes.Name;
}
}
}
/// <summary>
/// Upload a stream on Mega.co.nz and attach created node to selected parent
/// </summary>
/// <param name="stream">Data to upload</param>
/// <param name="name">Created node name</param>
/// <param name="parent">Node to attach the uploaded file (all types except <see cref="NodeType.File" /> are supported)</param>
/// <returns>Created node</returns>
/// <exception cref="NotSupportedException">Not logged in</exception>
/// <exception cref="ApiException">Mega.co.nz service reports an error</exception>
/// <exception cref="ArgumentNullException">stream or name or parent is null</exception>
/// <exception cref="ArgumentException">parent is not valid (all types except <see cref="NodeType.File" /> are supported)</exception>
public INode Upload(Stream stream, string name, INode parent)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
if (parent == null)
{
throw new ArgumentNullException("parent");
}
if (parent.Type == NodeType.File)
{
throw new ArgumentException("Invalid parent node");
}
this.EnsureLoggedIn();//check are login
string completionHandle = "-";
int remainingRetry = ApiRequestAttempts;
while (remainingRetry-- > 0)
{
UploadUrlRequest uploadRequest = new UploadUrlRequest(stream.Length);
UploadUrlResponse uploadResponse = this.Request <UploadUrlResponse>(uploadRequest);//Retrieve upload URL
using (MegaAesCtrStreamCrypter encryptedStream = new MegaAesCtrStreamCrypter(stream))
{
var chunkStartPosition = 0;
var chunksSizesToUpload = this.ComputeChunksSizesToUpload(encryptedStream.ChunksPositions, encryptedStream.Length).ToArray();
for (int i = 0; i < chunksSizesToUpload.Length; i++)
{
int chunkSize = chunksSizesToUpload[i];
byte[] chunkBuffer = new byte[chunkSize];
encryptedStream.Read(chunkBuffer, 0, chunkSize);
using (MemoryStream chunkStream = new MemoryStream(chunkBuffer))
{
Uri uri = new Uri(uploadResponse.Url + "/" + chunkStartPosition);
chunkStartPosition += chunkSize;
try
{
completionHandle = this.webClient.PostRequestRaw(uri, chunkStream);
if (completionHandle.StartsWith("-"))
{
break;
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
break;
}
}
}
if (completionHandle.StartsWith("-"))
{
Thread.Sleep(ApiRequestDelay); // Restart upload from the beginning
stream.Position = 0; // Reset steam position
continue;
}
byte[] cryptedAttributes = Crypto.EncryptAttributes(new Attributes(name), encryptedStream.FileKey);// Encrypt attributes
#region Compute the file key
byte[] fileKey = new byte[32];
for (int i = 0; i < 8; i++)
{
fileKey[i] = (byte)(encryptedStream.FileKey[i] ^ encryptedStream.Iv[i]);
fileKey[i + 16] = encryptedStream.Iv[i];
}
for (int i = 8; i < 16; i++)
{
fileKey[i] = (byte)(encryptedStream.FileKey[i] ^ encryptedStream.MetaMac[i - 8]);
fileKey[i + 16] = encryptedStream.MetaMac[i - 8];
}
byte[] encryptedKey = Crypto.EncryptKey(fileKey, this.masterKey);
#endregion
CreateNodeRequest createNodeRequest = CreateNodeRequest.CreateFileNodeRequest(parent, cryptedAttributes.ToBase64(), encryptedKey.ToBase64(), fileKey, completionHandle);
GetNodesResponse createNodeResponse = this.Request <GetNodesResponse>(createNodeRequest, this.masterKey);
return(createNodeResponse.Nodes[0]);
}
}
throw new UploadException(completionHandle);
}
