private static byte[] CreateSftpNameResponse(uint responseId, Encoding encoding, params string[] names)
{
var namesAndAttributes = new List <byte>();
foreach (var name in names)
{
var nameBytes = encoding.GetBytes(name);
var attributesBytes = SftpFileAttributes.Empty.GetBytes();
namesAndAttributes.AddRange((((uint)nameBytes.Length).GetBytes())); // filename length
namesAndAttributes.AddRange(nameBytes); // filename
namesAndAttributes.AddRange(((uint)0).GetBytes()); // longname length
namesAndAttributes.AddRange(attributesBytes); // attributes
}
var namesAndAttributesBytes = namesAndAttributes.ToArray();
var sshDataStream = new SshDataStream(4 + 1 + 4 + 4 + namesAndAttributesBytes.Length);
sshDataStream.Write((uint)sshDataStream.Capacity - 4);
sshDataStream.WriteByte((byte)SftpMessageTypes.Name);
sshDataStream.Write(responseId);
sshDataStream.Write((uint)names.Length);
sshDataStream.Write(namesAndAttributesBytes, 0, namesAndAttributesBytes.Length);
return(sshDataStream.ToArray());
}
public void Load_ShouldThrowNotSupportedExceptionWhenChannelTypeIsNotSupported()
{
var localChannelNumber = (uint)_random.Next(0, int.MaxValue);
var initialWindowSize = (uint)_random.Next(0, int.MaxValue);
var maximumPacketSize = (uint)_random.Next(0, int.MaxValue);
var channelName = "dunno_" + _random.Next().ToString(CultureInfo.InvariantCulture);
var channelType = _ascii.GetBytes(channelName);
var sshDataStream = new SshDataStream(1 + 4 + channelType.Length + 4 + 4 + 4);
sshDataStream.WriteByte(ChannelOpenMessage.MessageNumber);
sshDataStream.Write((uint)channelType.Length);
sshDataStream.Write(channelType, 0, channelType.Length);
sshDataStream.Write(localChannelNumber);
sshDataStream.Write(initialWindowSize);
sshDataStream.Write(maximumPacketSize);
var bytes = sshDataStream.ToArray();
var target = new ChannelOpenMessage();
try
{
target.Load(bytes);
Assert.Fail();
}
catch (NotSupportedException ex)
{
Assert.IsNull(ex.InnerException);
Assert.AreEqual(string.Format("Channel type '{0}' is not supported.", channelName), ex.Message);
}
}
public void Load()
{
var target = new SftpAttrsResponse(_protocolVersion);
var attributes = CreateSftpFileAttributes();
var attributesBytes = attributes.GetBytes();
var sshDataStream = new SshDataStream(4 + 1 + 4 + attributesBytes.Length);
sshDataStream.Position = 4; // skip 4 bytes for SSH packet length
sshDataStream.WriteByte((byte)SftpMessageTypes.Attrs);
sshDataStream.Write(_responseId);
sshDataStream.Write(attributesBytes, 0, attributesBytes.Length);
target.Load(sshDataStream.ToArray());
Assert.IsNotNull(target.Attributes);
Assert.AreEqual(_protocolVersion, target.ProtocolVersion);
Assert.AreEqual(_responseId, target.ResponseId);
Assert.AreEqual(SftpMessageTypes.Attrs, target.SftpMessageType);
// check attributes in detail
Assert.AreEqual(attributes.GroupId, target.Attributes.GroupId);
Assert.AreEqual(attributes.LastWriteTime, target.Attributes.LastWriteTime);
Assert.AreEqual(attributes.LastWriteTime, target.Attributes.LastWriteTime);
Assert.AreEqual(attributes.UserId, target.Attributes.UserId);
}
public byte[] Build()
{
var sshDataStream = new SshDataStream(0);
sshDataStream.WriteByte(KeyExchangeDhGroupExchangeGroup.MessageNumber);
sshDataStream.Write(_safePrime);
sshDataStream.Write(_subGroup);
return(sshDataStream.ToArray());
}
public void GetReply_StatVfsReplyInfo()
{
var bsize = (ulong)_random.Next(0, int.MaxValue);
var frsize = (ulong)_random.Next(0, int.MaxValue);
var blocks = (ulong)_random.Next(0, int.MaxValue);
var bfree = (ulong)_random.Next(0, int.MaxValue);
var bavail = (ulong)_random.Next(0, int.MaxValue);
var files = (ulong)_random.Next(0, int.MaxValue);
var ffree = (ulong)_random.Next(0, int.MaxValue);
var favail = (ulong)_random.Next(0, int.MaxValue);
var sid = (ulong)_random.Next(0, int.MaxValue);
var namemax = (ulong)_random.Next(0, int.MaxValue);
var sshDataStream = new SshDataStream(4 + 1 + 4 + 88);
sshDataStream.Position = 4; // skip 4 bytes for SSH packet length
sshDataStream.WriteByte((byte)SftpMessageTypes.Attrs);
sshDataStream.Write(_responseId);
sshDataStream.Write(bsize);
sshDataStream.Write(frsize);
sshDataStream.Write(blocks);
sshDataStream.Write(bfree);
sshDataStream.Write(bavail);
sshDataStream.Write(files);
sshDataStream.Write(ffree);
sshDataStream.Write(favail);
sshDataStream.Write(sid);
sshDataStream.Write((ulong)0x2);
sshDataStream.Write(namemax);
var sshData = sshDataStream.ToArray();
var target = new SftpExtendedReplyResponse(_protocolVersion);
target.Load(sshData, 5, sshData.Length - 5);
var reply = target.GetReply <StatVfsReplyInfo>();
Assert.IsNotNull(reply);
var information = reply.Information;
Assert.IsNotNull(information);
Assert.AreEqual(bavail, information.AvailableBlocks);
Assert.AreEqual(favail, information.AvailableNodes);
Assert.AreEqual(frsize, information.BlockSize);
Assert.AreEqual(bsize, information.FileSystemBlockSize);
Assert.AreEqual(bfree, information.FreeBlocks);
Assert.AreEqual(ffree, information.FreeNodes);
Assert.IsFalse(information.IsReadOnly);
Assert.AreEqual(namemax, information.MaxNameLenght);
Assert.AreEqual(sid, information.Sid);
Assert.IsFalse(information.SupportsSetUid);
Assert.AreEqual(blocks, information.TotalBlocks);
Assert.AreEqual(files, information.TotalNodes);
}
private byte[] BuildExtensions()
{
var sshDataStream = new SshDataStream(0);
foreach (var extensionPair in _extensions)
{
sshDataStream.Write(extensionPair.Key, Encoding.ASCII);
sshDataStream.Write(extensionPair.Value, Encoding.ASCII);
}
return(sshDataStream.ToArray());
}
public byte[] Build()
{
var extensions = BuildExtensions();
var sshDataStream = new SshDataStream(4 + 1 + 4 + extensions.Length);
sshDataStream.Write((uint)sshDataStream.Capacity - 4);
sshDataStream.WriteByte((byte)SftpMessageTypes.Version);
sshDataStream.Write(_version);
sshDataStream.Write(extensions, 0, extensions.Length);
return(sshDataStream.ToArray());
}
public byte[] Build()
{
var serviceName = _serviceName.ToArray();
var sshDataStream = new SshDataStream(4 + 1 + 1 + 4 + serviceName.Length);
sshDataStream.Write((uint)(sshDataStream.Capacity - 4)); // packet length
sshDataStream.WriteByte(0); // padding length
sshDataStream.WriteByte(ServiceAcceptMessage.MessageNumber);
sshDataStream.WriteBinary(serviceName);
return(sshDataStream.ToArray());
}
private static byte[] CreateSftpDataResponse(uint responseId, byte[] data)
{
var sshDataStream = new SshDataStream(4 + 1 + 4 + 4 + data.Length + 1);
sshDataStream.Write((uint)sshDataStream.Capacity - 4);
sshDataStream.WriteByte((byte)SftpMessageTypes.Data);
sshDataStream.Write(responseId);
sshDataStream.Write((uint)data.Length);
sshDataStream.Write(data, 0, data.Length);
sshDataStream.WriteByte(1); // EOF
return(sshDataStream.ToArray());
}
public byte[] Build()
{
var sshDataStream = new SshDataStream(0);
sshDataStream.WriteByte(KeyExchangeDhGroupExchangeReply.MessageNumber);
sshDataStream.Write((uint)(4 + _hostKeyAlgorithm.Length + _hostKeys.Length));
sshDataStream.Write((uint)_hostKeyAlgorithm.Length);
sshDataStream.Write(_hostKeyAlgorithm, 0, _hostKeyAlgorithm.Length);
sshDataStream.Write(_hostKeys, 0, _hostKeys.Length);
sshDataStream.Write(_f);
sshDataStream.WriteBinary(_signature);
return(sshDataStream.ToArray());
}
public void Load()
{
var target = new SftpExtendedReplyResponse(_protocolVersion);
var sshDataStream = new SshDataStream(4);
sshDataStream.Write(_responseId);
target.Load(sshDataStream.ToArray());
Assert.AreEqual(_protocolVersion, target.ProtocolVersion);
Assert.AreEqual(_responseId, target.ResponseId);
Assert.AreEqual(SftpMessageTypes.ExtendedReply, target.SftpMessageType);
}
public KeyExchangeDhGroupExchangeReplyBuilder WithHostKey(string hostKeyAlgorithm, params BigInteger[] hostKeys)
{
_hostKeyAlgorithm = Encoding.UTF8.GetBytes(hostKeyAlgorithm);
var sshDataStream = new SshDataStream(0);
foreach (var hostKey in hostKeys)
{
sshDataStream.Write(hostKey);
}
_hostKeys = sshDataStream.ToArray();
return(this);
}
public void Load()
{
var target = new SftpExtendedReplyResponse(_protocolVersion);
var sshDataStream = new SshDataStream(4 + 1 + 4);
sshDataStream.Position = 4; // skip 4 bytes for SSH packet length
sshDataStream.WriteByte((byte)SftpMessageTypes.ExtendedReply);
sshDataStream.Write(_responseId);
target.Load(sshDataStream.ToArray());
Assert.AreEqual(_protocolVersion, target.ProtocolVersion);
Assert.AreEqual(_responseId, target.ResponseId);
Assert.AreEqual(SftpMessageTypes.ExtendedReply, target.SftpMessageType);
}
private static byte[] CreatePacketForUnsupportedMessageType()
{
byte messageType = 255;
byte messageLength = 1;
byte paddingLength = 10;
var packetDataLength = (uint)messageLength + paddingLength + 1;
var sshDataStream = new SshDataStream(4 + 1 + messageLength + paddingLength);
sshDataStream.Write(packetDataLength);
sshDataStream.WriteByte(paddingLength);
sshDataStream.WriteByte(messageType);
sshDataStream.Write(new byte[paddingLength]);
return(sshDataStream.ToArray());
}
public void Load_ShouldIgnoreDataWhenItsLengthIsGreatherThanItsActualBytes()
{
var ssh = new SshDataStream(1);
ssh.WriteByte(2); // Type
ssh.Write(5u); // Data length
ssh.Write(new byte[3]); // Data
var ignoreMessageBytes = ssh.ToArray();
var ignoreMessage = new IgnoreMessage();
ignoreMessage.Load(ignoreMessageBytes, 1, ignoreMessageBytes.Length - 1);
Assert.IsNotNull(ignoreMessage.Data);
Assert.AreEqual(0, ignoreMessage.Data.Length);
}
public void Load()
{
var target = new SftpHandleResponse(_protocolVersion);
var sshDataStream = new SshDataStream(4 + _handle.Length);
sshDataStream.Write(_responseId);
sshDataStream.Write((uint)_handle.Length);
sshDataStream.Write(_handle, 0, _handle.Length);
target.Load(sshDataStream.ToArray());
Assert.IsNotNull(target.Handle);
Assert.IsTrue(target.Handle.SequenceEqual(_handle));
Assert.AreEqual(_protocolVersion, target.ProtocolVersion);
Assert.AreEqual(_responseId, target.ResponseId);
Assert.AreEqual(SftpMessageTypes.Handle, target.SftpMessageType);
}
public void Load_Data()
{
const uint one = 123456u;
const uint two = 456789u;
var sshDataStream = new SshDataStream(8);
sshDataStream.Write(one);
sshDataStream.Write(two);
var sshData = sshDataStream.ToArray();
var request = new RequestSshData();
request.Load(sshData);
Assert.AreEqual(one, request.ValueOne);
Assert.AreEqual(two, request.ValueTwo);
}
public void Load()
{
var sshDataStream = new SshDataStream(4 + 1 + 4 + 88);
sshDataStream.Write(_responseId);
sshDataStream.Write(_bsize);
sshDataStream.Write(_frsize);
sshDataStream.Write(_blocks);
sshDataStream.Write(_bfree);
sshDataStream.Write(_bavail);
sshDataStream.Write(_files);
sshDataStream.Write(_ffree);
sshDataStream.Write(_favail);
sshDataStream.Write(_sid);
sshDataStream.Write((ulong)0x1);
sshDataStream.Write(_namemax);
var extendedReplyResponse = new SftpExtendedReplyResponse(SftpSession.MaximumSupportedVersion);
extendedReplyResponse.Load(sshDataStream.ToArray());
Assert.AreEqual(_responseId, extendedReplyResponse.ResponseId);
var target = extendedReplyResponse.GetReply <StatVfsReplyInfo>();
Assert.IsNotNull(target.Information);
var information = target.Information;
Assert.AreEqual(_bavail, information.AvailableBlocks);
Assert.AreEqual(_favail, information.AvailableNodes);
Assert.AreEqual(_frsize, information.BlockSize);
Assert.AreEqual(_bsize, information.FileSystemBlockSize);
Assert.AreEqual(_bfree, information.FreeBlocks);
Assert.AreEqual(_ffree, information.FreeNodes);
Assert.IsTrue(information.IsReadOnly);
Assert.AreEqual(_namemax, information.MaxNameLenght);
Assert.AreEqual(_sid, information.Sid);
Assert.IsTrue(information.SupportsSetUid);
Assert.AreEqual(_blocks, information.TotalBlocks);
Assert.AreEqual(_files, information.TotalNodes);
}
public void Load()
{
var target = new StatVfsReplyInfo();
#if TUNING
var sshDataStream = new SshDataStream(4 + 1 + 4 + 88);
sshDataStream.Write((uint)(sshDataStream.Capacity - 4));
#else
var sshDataStream = new SshDataStream(1 + 4 + 88);
#endif
sshDataStream.WriteByte((byte)SftpMessageTypes.ExtendedReply);
sshDataStream.Write(_responseId);
sshDataStream.Write(_bsize);
sshDataStream.Write(_frsize);
sshDataStream.Write(_blocks);
sshDataStream.Write(_bfree);
sshDataStream.Write(_bavail);
sshDataStream.Write(_files);
sshDataStream.Write(_ffree);
sshDataStream.Write(_favail);
sshDataStream.Write(_sid);
sshDataStream.Write((ulong)0x1);
sshDataStream.Write(_namemax);
target.Load(sshDataStream.ToArray());
Assert.IsNotNull(target.Information);
var information = target.Information;
Assert.AreEqual(_bavail, information.AvailableBlocks);
Assert.AreEqual(_favail, information.AvailableNodes);
Assert.AreEqual(_frsize, information.BlockSize);
Assert.AreEqual(_bsize, information.FileSystemBlockSize);
Assert.AreEqual(_bfree, information.FreeBlocks);
Assert.AreEqual(_ffree, information.FreeNodes);
Assert.IsTrue(information.IsReadOnly);
Assert.AreEqual(_namemax, information.MaxNameLenght);
Assert.AreEqual(_sid, information.Sid);
Assert.IsTrue(information.SupportsSetUid);
Assert.AreEqual(_blocks, information.TotalBlocks);
Assert.AreEqual(_files, information.TotalNodes);
}
public byte[] Build()
{
var sshDataStream = new SshDataStream(4 + 1 + 4 + 88);
sshDataStream.Write((uint)sshDataStream.Capacity - 4);
sshDataStream.WriteByte((byte)SftpMessageTypes.ExtendedReply);
sshDataStream.Write(_responseId);
sshDataStream.Write(_bsize);
sshDataStream.Write(_frsize);
sshDataStream.Write(_blocks);
sshDataStream.Write(_bfree);
sshDataStream.Write(_bavail);
sshDataStream.Write(_files);
sshDataStream.Write(_ffree);
sshDataStream.Write(_favail);
sshDataStream.Write(_sid);
sshDataStream.Write(_flag);
sshDataStream.Write(_namemax);
return(sshDataStream.ToArray());
}
public void Load()
{
var target = new SftpDataResponse(_protocolVersion);
var sshDataStream = new SshDataStream(4 + 1 + 4 + _data.Length);
sshDataStream.Position = 4; // skip 4 bytes for SSH packet length
sshDataStream.WriteByte((byte)SftpMessageTypes.Attrs);
sshDataStream.Write(_responseId);
sshDataStream.Write((uint)_data.Length);
sshDataStream.Write(_data, 0, _data.Length);
target.Load(sshDataStream.ToArray());
Assert.IsNotNull(target.Data);
Assert.IsTrue(target.Data.SequenceEqual(_data));
Assert.AreEqual(_protocolVersion, target.ProtocolVersion);
Assert.AreEqual(_responseId, target.ResponseId);
Assert.AreEqual(SftpMessageTypes.Data, target.SftpMessageType);
}
public void Load()
{
var target = new SftpDataResponse(_protocolVersion);
var sshDataStream = new SshDataStream(4 + _data.Length);
sshDataStream.Write(_responseId);
sshDataStream.Write((uint)_data.Length);
sshDataStream.Write(_data, 0, _data.Length);
var sshData = sshDataStream.ToArray();
target.Load(sshData);
Assert.IsNotNull(target.Data);
Assert.IsTrue(target.Data.SequenceEqual(_data));
Assert.AreEqual(_protocolVersion, target.ProtocolVersion);
Assert.AreEqual(_responseId, target.ResponseId);
Assert.AreEqual(SftpMessageTypes.Data, target.SftpMessageType);
}
public void OfType()
{
const uint one = 123456u;
const uint two = 456789u;
var sshDataStream = new SshDataStream(8);
sshDataStream.Write(one);
sshDataStream.Write(two);
var sshData = sshDataStream.ToArray();
var request = new RequestSshData();
request.Load(sshData);
var reply = request.OfType <ReplySshData>();
Assert.IsNotNull(reply);
Assert.AreEqual(one, reply.ValueOne);
}
public void Load_ShouldThrowNotSupportedExceptionWhenDataLengthIsGreaterThanInt32MaxValue()
{
var ssh = new SshDataStream(1);
ssh.WriteByte(2); // Type
ssh.Write(uint.MaxValue); // Data length
ssh.Write(new byte[3]);
var ignoreMessageBytes = ssh.ToArray();
var ignoreMessage = new IgnoreMessage();
try
{
ignoreMessage.Load(ignoreMessageBytes, 1, ignoreMessageBytes.Length - 1);
Assert.Fail();
}
catch (NotSupportedException ex)
{
Assert.IsNull(ex.InnerException);
Assert.AreEqual(string.Format(CultureInfo.CurrentCulture, "Data longer than {0} is not supported.", int.MaxValue), ex.Message);
}
}
public void Load_DataAndOffsetAndCount()
{
const uint one = 123456u;
const uint two = 456789u;
var sshDataStream = new SshDataStream(11);
sshDataStream.WriteByte(0x05);
sshDataStream.WriteByte(0x07);
sshDataStream.WriteByte(0x0f);
sshDataStream.Write(one);
sshDataStream.Write(two);
var sshData = sshDataStream.ToArray();
var request = new RequestSshData();
request.Load(sshData, 3, sshData.Length - 3);
Assert.AreEqual(one, request.ValueOne);
Assert.AreEqual(two, request.ValueTwo);
}
public void OfType_LoadWithOffset()
{
const uint one = 123456u;
const uint two = 456789u;
var sshDataStream = new SshDataStream(11);
sshDataStream.WriteByte(0x05);
sshDataStream.WriteByte(0x07);
sshDataStream.WriteByte(0x0f);
sshDataStream.Write(one);
sshDataStream.Write(two);
var sshData = sshDataStream.ToArray();
var request = new RequestSshData();
request.Load(sshData, 3, sshData.Length - 3);
var reply = request.OfType <ReplySshData>();
Assert.IsNotNull(reply);
Assert.AreEqual(one, reply.ValueOne);
}
public void Load()
{
var target = new SftpHandleResponse(_protocolVersion);
#if TUNING
var sshDataStream = new SshDataStream(4 + 1 + 4 + _handle.Length);
sshDataStream.Position = 4; // skip 4 bytes for SSH packet length
#else
var sshDataStream = new SshDataStream(1 + 4 + _handle.Length);
#endif
sshDataStream.WriteByte((byte)SftpMessageTypes.Handle);
sshDataStream.Write(_responseId);
sshDataStream.Write((uint)_handle.Length);
sshDataStream.Write(_handle, 0, _handle.Length);
target.Load(sshDataStream.ToArray());
Assert.IsNotNull(target.Handle);
Assert.IsTrue(target.Handle.SequenceEqual(_handle));
Assert.AreEqual(_protocolVersion, target.ProtocolVersion);
Assert.AreEqual(_responseId, target.ResponseId);
Assert.AreEqual(SftpMessageTypes.Handle, target.SftpMessageType);
}
/// <summary>
/// Returns a byte array representing the current <see cref="SftpFileAttributes"/>.
/// </summary>
/// <returns>
/// A byte array representing the current <see cref="SftpFileAttributes"/>.
/// </returns>
public byte[] GetBytes()
{
var stream = new SshDataStream(4);
uint flag = 0;
if (IsSizeChanged && IsRegularFile)
{
flag |= 0x00000001;
}
if (IsUserIdChanged || IsGroupIdChanged)
{
flag |= 0x00000002;
}
if (IsPermissionsChanged)
{
flag |= 0x00000004;
}
if (IsLastAccessTimeChanged || IsLastWriteTimeChanged)
{
flag |= 0x00000008;
}
if (IsExtensionsChanged)
{
flag |= 0x80000000;
}
stream.Write(flag);
if (IsSizeChanged && IsRegularFile)
{
stream.Write((ulong)Size);
}
if (IsUserIdChanged || IsGroupIdChanged)
{
stream.Write((uint)UserId);
stream.Write((uint)GroupId);
}
if (IsPermissionsChanged)
{
stream.Write(Permissions);
}
if (IsLastAccessTimeChanged || IsLastWriteTimeChanged)
{
var time = (uint)(LastAccessTime.ToFileTime() / 10000000 - 11644473600);
stream.Write(time);
time = (uint)(LastWriteTime.ToFileTime() / 10000000 - 11644473600);
stream.Write(time);
}
if (IsExtensionsChanged)
{
foreach (var item in Extensions)
{
// TODO: we write as ASCII but read as UTF8 !!!
stream.Write(item.Key, SshData.Ascii);
stream.Write(item.Value, SshData.Ascii);
}
}
return(stream.ToArray());
}
internal byte[] GetPacket(byte paddingMultiplier, Compressor compressor)
{
const int outboundPacketSequenceSize = 4;
var messageLength = BufferCapacity;
SshDataStream sshDataStream;
if (messageLength == -1 || compressor != null)
{
sshDataStream = new SshDataStream(DefaultCapacity);
// skip:
// * 4 bytes for the outbound packet sequence
// * 4 bytes for the packet data length
// * one byte for the packet padding length
sshDataStream.Seek(outboundPacketSequenceSize + 4 + 1, SeekOrigin.Begin);
if (compressor != null)
{
// obtain uncompressed message payload
var uncompressedDataStream = new SshDataStream(messageLength != -1 ? messageLength : DefaultCapacity);
WriteBytes(uncompressedDataStream);
// compress message payload
var compressedMessageData = compressor.Compress(uncompressedDataStream.ToArray());
// add compressed message payload
sshDataStream.Write(compressedMessageData, 0, compressedMessageData.Length);
}
else
{
// add message payload
WriteBytes(sshDataStream);
}
messageLength = (int)sshDataStream.Length - (outboundPacketSequenceSize + 4 + 1);
var packetLength = messageLength + 4 + 1;
// determine the padding length
var paddingLength = GetPaddingLength(paddingMultiplier, packetLength);
// add padding bytes
var paddingBytes = new byte[paddingLength];
HashAlgorithmFactory.GenerateRandom(paddingBytes);
sshDataStream.Write(paddingBytes, 0, paddingLength);
var packetDataLength = GetPacketDataLength(messageLength, paddingLength);
// skip bytes for outbound packet sequence
sshDataStream.Seek(outboundPacketSequenceSize, SeekOrigin.Begin);
// add packet data length
sshDataStream.Write(packetDataLength.GetBytes(), 0, 4);
// add packet padding length
sshDataStream.WriteByte(paddingLength);
}
else
{
var packetLength = messageLength + 4 + 1;
// determine the padding length
var paddingLength = GetPaddingLength(paddingMultiplier, packetLength);
var packetDataLength = GetPacketDataLength(messageLength, paddingLength);
// lets construct an SSH data stream of the exact size required
sshDataStream = new SshDataStream(packetLength + paddingLength + outboundPacketSequenceSize);
// skip bytes for outbound packet sequenceSize
sshDataStream.Seek(outboundPacketSequenceSize, SeekOrigin.Begin);
// add packet data length
sshDataStream.Write(packetDataLength.GetBytes(), 0, 4);
// add packet padding length
sshDataStream.WriteByte(paddingLength);
// add message payload
WriteBytes(sshDataStream);
// add padding bytes
var paddingBytes = new byte[paddingLength];
HashAlgorithmFactory.GenerateRandom(paddingBytes);
sshDataStream.Write(paddingBytes, 0, paddingLength);
}
return(sshDataStream.ToArray());
}