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 (SharingKey != null && nodesResponse.SharedKeys.Any(x => x.Id == Id) == false)
{
nodesResponse.SharedKeys.Add(new SharedKey(Id, SharingKey));
}
return;
}
else
{
byte[] masterKey = (byte[])context[1];
CreationDate = SerializedCreationDate.ToDateTime();
if (Type == NodeType.File || 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 = 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 (Type == NodeType.Directory)
{
SharedKey = masterKey;
}
else
{
SharedKey = Crypto.DecryptKey(encryptedKey, masterKey);
}
}
}
FullKey = Crypto.DecryptKey(encryptedKey, masterKey);
if (Type == NodeType.File)
{
byte[] iv, metaMac, fileKey;
Crypto.GetPartsFromDecryptedKey(FullKey, out iv, out metaMac, out fileKey);
Iv = iv;
MetaMac = metaMac;
Key = fileKey;
}
else
{
Key = FullKey;
}
Attributes = Crypto.DecryptAttributes(SerializedAttributes.FromBase64(), Key);
}
}
}
public void OnDeserialized(StreamingContext ctx)
{
// Add key from incoming sharing.
if (SharingKey != null && _sharedKeys.Any(x => x.Id == Id) == false)
{
_sharedKeys.Add(new SharedKey(Id, SharingKey));
}
CreationDate = SerializedCreationDate.ToDateTime();
if (Type == NodeType.File || Type == NodeType.Directory)
{
// Check if file is not yet decrypted
if (string.IsNullOrEmpty(SerializedKey))
{
EmptyKey = true;
return;
}
// 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
var serializedKey = SerializedKey.Split('/')[0];
var splitPosition = serializedKey.IndexOf(":", StringComparison.Ordinal);
var encryptedKey = serializedKey.Substring(splitPosition + 1).FromBase64();
// If node is shared, we need to retrieve shared masterkey
if (_sharedKeys != null)
{
var handle = serializedKey.Substring(0, splitPosition);
var sharedKey = _sharedKeys.FirstOrDefault(x => x.Id == handle);
if (sharedKey != null)
{
_masterKey = Crypto.DecryptKey(sharedKey.Key.FromBase64(), _masterKey);
if (Type == NodeType.Directory)
{
SharedKey = _masterKey;
}
else
{
SharedKey = Crypto.DecryptKey(encryptedKey, _masterKey);
}
}
}
if (encryptedKey.Length != 16 && encryptedKey.Length != 32)
{
// Invalid key size
return;
}
FullKey = Crypto.DecryptKey(encryptedKey, _masterKey);
if (Type == NodeType.File)
{
Crypto.GetPartsFromDecryptedKey(FullKey, out var iv, out var metaMac, out var fileKey);
Iv = iv;
MetaMac = metaMac;
Key = fileKey;
}
else
{
Key = FullKey;
}
Attributes = Crypto.DecryptAttributes(SerializedAttributes.FromBase64(), Key);
FileAttributes = DeserializeFileAttributes(SerializedFileAttributes);
}
}
