/// <summary>
/// to create a NtTransactCreate request packet.
/// </summary>
/// <param name="uid">This field SHOULD identify the authenticated instance of the user.</param>
/// <param name="treeId">This field identifies the subdirectory (or tree) on the server that the client is
/// accessing.</param>
/// <param name="ntTransParametersFlags">A 32-bit field containing a set of flags that modify the client
/// request. Unused bits SHOULD be set to 0 by the client when sending a message and MUST be ignored when
/// received by the server. </param>
/// <param name="rootDirectoryFID">If nonzero, this value is the FID of an opened root directory, and the Name
/// field MUST be handled as relative to the directory specified by this FID. If this value is zero the Name
/// field MUST be handled as relative to the root of the share (the TID). The FID MUST have been acquired in a
/// previous message exchange</param>
/// <param name="desiredAccess">A 32-bit field containing standard, specific, and generic access rights</param>
/// <param name="allocationSize">The client MUST set this value to the initial allocation size of the file in
/// bytes</param>
/// <param name="extFileAttributes">A 32-bit field containing encoded file attribute values and file access
/// behavior flag values.</param>
/// <param name="shareAccess">A 32-bit field that specifies how the file SHOULD be shared with other processes.
/// </param>
/// <param name="createDisposition">A 32-bit value that represents the action to take if the file already
/// exists or if the file is a new file and does not already exist.</param>
/// <param name="createOptions">ULONG A 32-bit field containing flag options to use if creating the file or
/// directory. This field MUST be set to 0 or a combination of the following possible values</param>
/// <param name="impersonationLevel">ULONG A value that indicates what security context the server SHOULD use
/// when executing the command on behalf of the client</param>
/// <param name="securityFlags">A 32-bit field containing a set of options that specify the security tracking
/// mode.</param>
/// <param name="name">The name of the file; not null-terminated. </param>
/// <param name="securityDescriptor">The security descriptor to use when requesting access to the file</param>
/// <param name="extendedAttributes">The list of extended attributes that SHOULD be applied to the new file.
/// </param>
/// <returns>a NtTransactCreate request packet</returns>
/// <exception cref="System.NullReferenceException">There is no connection in context. </exception>
public SmbNtTransactCreateRequestPacket CreateNtTransactCreateRequest(
ushort uid,
ushort treeId,
NtTransactFlags ntTransParametersFlags,
uint rootDirectoryFID,
NtTransactDesiredAccess desiredAccess,
ulong allocationSize,
SMB_EXT_FILE_ATTR extFileAttributes,
NtTransactShareAccess shareAccess,
NtTransactCreateDisposition createDisposition,
NtTransactCreateOptions createOptions,
NtTransactImpersonationLevel impersonationLevel,
NtTransactSecurityFlags securityFlags,
string name,
RawSecurityDescriptor securityDescriptor,
FILE_FULL_EA_INFORMATION[] extendedAttributes)
{
return this.CreateNtTransactCreateRequest(this.Context.GetMessageId(this.connectionId),
uid, treeId, this.defaultParameters.Flag, this.defaultParameters.Flag2, this.defaultParameters.MaxSetupCount,
this.defaultParameters.MaxParameterCount, this.defaultParameters.MaxDataCount, ntTransParametersFlags,
rootDirectoryFID, desiredAccess, allocationSize, extFileAttributes, shareAccess,
createDisposition, createOptions, impersonationLevel, securityFlags, name,
securityDescriptor, extendedAttributes);
}
/// <summary>
/// Create a not transaction create request packet for client to create new or open share on server.
/// </summary>
/// <param name = "treeId">the valid tree connect id, must be response by server of the tree connect. </param>
/// <param name = "fileName">A string that represents the name of the file to open or create. </param>
/// <param name = "desiredAccess">
/// Access wanted. This value MUST be specified in the ACCESS_MASK format, as specified in [CIFS] section 3.7.
/// </param>
/// <param name = "extFileAttributes">Extended attributes and flags for this file or directory. </param>
/// <param name = "shareAccess">Type of shared access requested for this file or directory. </param>
/// <param name = "createDisposition">The action to take if a file does or does not exist. </param>
/// <param name = "createOptions">The options to use if creating the file or directory. </param>
/// <param name = "impersonationLevel">
/// This field specifies the information given to the server about the client and how the server MUST
/// represent, or impersonate, the client.
/// </param>
/// <param name = "createFlags">
/// A 32-bit field containing a set of options that specify the security tracking mode.
/// </param>
/// <param name="securityDescriptor">The security descriptor to use when requesting access to the file</param>
/// <param name="extendedAttributes">
/// The list of extended attributes that SHOULD be applied to the new file.
/// </param>
/// <returns>a nt transaction create request packet</returns>
public virtual SmbNtTransactCreateRequestPacket CreateNtTransCreateRequest(
ushort treeId,
string fileName,
NtTransactDesiredAccess desiredAccess,
SMB_EXT_FILE_ATTR extFileAttributes,
NtTransactShareAccess shareAccess,
NtTransactCreateDisposition createDisposition,
NtTransactCreateOptions createOptions,
NtTransactImpersonationLevel impersonationLevel,
CreateFlags createFlags,
RawSecurityDescriptor securityDescriptor,
FILE_FULL_EA_INFORMATION[] extendedAttributes)
{
Cifs.SmbNtTransactCreateRequestPacket request = this.cifsClient.CreateNtTransactCreateRequest(
this.MessageId, this.GetSessionIdByTreeId(treeId), treeId,
(SmbFlags)this.capability.Flag, (SmbFlags2)this.capability.Flags2,
this.capability.MaxSetupCount, this.capability.MaxParameterCount, this.capability.MaxDataCount,
(NtTransactFlags)createFlags,
0, // No root directory
desiredAccess,
0, // AllocationSize should be 0
extFileAttributes, shareAccess, createDisposition, (Cifs.NtTransactCreateOptions)createOptions,
impersonationLevel,
(NtTransactSecurityFlags)0x00,
fileName,
securityDescriptor, // No security descriptor
extendedAttributes // No extended attributes
);
return new SmbNtTransactCreateRequestPacket(request);
}
/// <summary>
/// to create a NtTransactCreate request packet.
/// </summary>
/// <param name="messageId">This field SHOULD be the multiplex ID that is used to associate a response with a
/// request.</param>
/// <param name="uid">This field SHOULD identify the authenticated instance of the user.</param>
/// <param name="treeId">This field identifies the subdirectory (or tree) on the server that the client is
/// accessing.</param>
/// <param name="flags">An 8-bit field of 1-bit flags describing various features in effect for the
/// message</param>
/// <param name="flags2">A 16-bit field of 1-bit flags that represent various features in effect for the
/// message. Unspecified bits are reserved and MUST be zero.</param>
/// <param name="maxParameterCount">The maximum number of parameter bytes that the client will accept in the
/// transaction reply. The server MUST NOT return more than this number of parameter bytes.</param>
/// <param name="maxDataCount">The maximum number of data bytes that the client will accept in the transaction
/// reply. The server MUST NOT return more than this number of data bytes.</param>
/// <param name="maxSetupCount">Maximum number of setup bytes that the client will accept in the transaction
/// reply. The server MUST NOT return more than this number of setup bytes</param>
/// <param name="ntTransParametersFlags">A 32-bit field containing a set of flags that modify the client
/// request. Unused bits SHOULD be set to 0 by the client when sending a message and MUST be ignored when
/// received by the server. </param>
/// <param name="rootDirectoryFID">If nonzero, this value is the FID of an opened root directory, and the Name
/// field MUST be handled as relative to the directory specified by this FID. If this value is zero the Name
/// field MUST be handled as relative to the root of the share (the TID). The FID MUST have been acquired in a
/// previous message exchange</param>
/// <param name="desiredAccess">A 32-bit field containing standard, specific, and generic access rights</param>
/// <param name="allocationSize">The client MUST set this value to the initial allocation size of the file in
/// bytes</param>
/// <param name="extFileAttributes">A 32-bit field containing encoded file attribute values and file access
/// behavior flag values.</param>
/// <param name="shareAccess">A 32-bit field that specifies how the file SHOULD be shared with other processes.
/// </param>
/// <param name="createDisposition">A 32-bit value that represents the action to take if the file already
/// exists or if the file is a new file and does not already exist.</param>
/// <param name="createOptions">ULONG A 32-bit field containing flag options to use if creating the file or
/// directory. This field MUST be set to 0 or a combination of the following possible values</param>
/// <param name="impersonationLevel">ULONG A value that indicates what security context the server SHOULD use
/// when executing the command on behalf of the client</param>
/// <param name="securityFlags">A 32-bit field containing a set of options that specify the security tracking mode.</param>
/// <param name="name">The name of the file; not null-terminated. </param>
/// <param name="securityDescriptor">The security descriptor to use when requesting access to the file</param>
/// <param name="extendedAttributes">The list of extended attributes that SHOULD be applied to the new file.
/// </param>
/// <returns>a NtTransactCreate request packet</returns>
public SmbNtTransactCreateRequestPacket CreateNtTransactCreateRequest(
ushort messageId,
ushort uid,
ushort treeId,
SmbFlags flags,
SmbFlags2 flags2,
byte maxSetupCount,
uint maxParameterCount,
uint maxDataCount,
NtTransactFlags ntTransParametersFlags,
uint rootDirectoryFID,
NtTransactDesiredAccess desiredAccess,
ulong allocationSize,
SMB_EXT_FILE_ATTR extFileAttributes,
NtTransactShareAccess shareAccess,
NtTransactCreateDisposition createDisposition,
NtTransactCreateOptions createOptions,
NtTransactImpersonationLevel impersonationLevel,
NtTransactSecurityFlags securityFlags,
string name,
RawSecurityDescriptor securityDescriptor,
FILE_FULL_EA_INFORMATION[] extendedAttributes)
{
if (name == null)
{
name = string.Empty;
}
if (extendedAttributes == null)
{
extendedAttributes = new FILE_FULL_EA_INFORMATION[0];
}
SmbNtTransactCreateRequestPacket packet = new SmbNtTransactCreateRequestPacket();
packet.SmbHeader = CifsMessageUtils.CreateSmbHeader(SmbCommand.SMB_COM_NT_TRANSACT,
messageId, uid, treeId, flags, flags2);
// Set Smb_Parameters
SMB_COM_NT_TRANSACT_Request_SMB_Parameters smbParameters =
new SMB_COM_NT_TRANSACT_Request_SMB_Parameters();
smbParameters.MaxSetupCount = maxSetupCount;
smbParameters.MaxParameterCount = maxParameterCount;
smbParameters.MaxDataCount = maxDataCount;
smbParameters.SetupCount = 0; // the correct count in word of the Setup is always 0.
smbParameters.Function = NtTransSubCommand.NT_TRANSACT_CREATE;
smbParameters.Setup = new ushort[0];
smbParameters.WordCount = (byte)(CifsMessageUtils.GetSize<SMB_COM_NT_TRANSACT_Request_SMB_Parameters>(
smbParameters) / NumBytesOfWord);
// Set Smb_Data
SMB_COM_NT_TRANSACT_Request_SMB_Data smbData = new SMB_COM_NT_TRANSACT_Request_SMB_Data();
// Set NT_TransParameters
NT_TRANSACT_CREATE_Request_NT_Trans_Parameters ntTransParameters =
new NT_TRANSACT_CREATE_Request_NT_Trans_Parameters();
ntTransParameters.Flags = ntTransParametersFlags;
ntTransParameters.RootDirectoryFID = rootDirectoryFID;
ntTransParameters.DesiredAccess = desiredAccess;
ntTransParameters.AllocationSize = allocationSize;
if (createDisposition == NtTransactCreateDisposition.FILE_OPEN
|| createDisposition == NtTransactCreateDisposition.NONE
|| (extFileAttributes & SMB_EXT_FILE_ATTR.ATTR_DIRECTORY)
== SMB_EXT_FILE_ATTR.ATTR_DIRECTORY)
{
ntTransParameters.AllocationSize = 0;
}
ntTransParameters.ExtFileAttributes = extFileAttributes;
ntTransParameters.ShareAccess = shareAccess;
ntTransParameters.CreateDisposition = createDisposition;
ntTransParameters.CreateOptions = createOptions;
ntTransParameters.SecurityDescriptorLength = securityDescriptor == null
? 0 : (uint)securityDescriptor.BinaryLength;
ntTransParameters.ImpersonationLevel = impersonationLevel;
ntTransParameters.SecurityFlags = securityFlags;
if ((flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) == SmbFlags2.SMB_FLAGS2_UNICODE)
{
ntTransParameters.Name = Encoding.Unicode.GetBytes(name);
}
else
{
ntTransParameters.Name = Encoding.ASCII.GetBytes(name);
}
ntTransParameters.NameLength = (uint)ntTransParameters.Name.Length;
// The size of the preceding SmbParameters part plus Header is an odd number for all cifs messages
// Use ntTransParameters field to judge whether needs to add one 16-bits align pad.
if ((flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) == SmbFlags2.SMB_FLAGS2_UNICODE &&
CifsMessageUtils.GetSize<NT_TRANSACT_CREATE_Request_NT_Trans_Parameters>(ntTransParameters) % twoBytesAlign == 0)
{
// pad 1 byte for 16-bits align:
smbData.Pad2 = new byte[1];
}
else
{
smbData.Pad2 = new byte[0];
}
// Set NT_TransData
NT_TRANSACT_CREATE_Request_NT_Trans_Data ntTransData = new NT_TRANSACT_CREATE_Request_NT_Trans_Data();
ntTransData.ExtendedAttributes = extendedAttributes;
for (int i = 0; i < ntTransData.ExtendedAttributes.Length; i++)
{
int eaNameLength = ntTransData.ExtendedAttributes[i].EaName == null
? 0 : ntTransData.ExtendedAttributes[i].EaName.Length;
int eaValueLength = ntTransData.ExtendedAttributes[i].EaValue == null
? 0 : ntTransData.ExtendedAttributes[i].EaValue.Length;
uint currentLength = (uint)(EA.FULL_EA_FIXED_SIZE + eaNameLength + eaValueLength);
uint alignPad = (fourBytesAlign - currentLength % fourBytesAlign) % fourBytesAlign;
if (i != ntTransData.ExtendedAttributes.Length - 1)
{
currentLength += alignPad;
ntTransData.ExtendedAttributes[i].NextEntryOffset = currentLength;
}
ntTransParameters.EALength += currentLength;
}
ntTransData.SecurityDescriptor = securityDescriptor;
packet.SmbParameters = smbParameters;
packet.SmbData = smbData;
packet.NtTransParameters = ntTransParameters;
packet.NtTransData = ntTransData;
packet.UpdateCountAndOffset();
return packet;
}
