Amir Abbas
326 lines
13 KiB
Swift
326 lines
13 KiB
Swift
//
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// SMB2Query.swift
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// ExtDownloader
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//
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// Created by Amir Abbas Mousavian on 4/31/95.
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// Copyright © 1395 Mousavian. All rights reserved.
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//
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import Foundation
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extension SMB2 {
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// MARK: SMB2 Query Directory
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struct QueryDirectoryRequest: SMBRequestBody {
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let header: QueryDirectoryRequest.Header
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let searchPattern: String?
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/// - **bufferLength:** maximum number of bytes the server is allowed to return which is the same as maxTransactSize returned by negotiation.
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/// - **searchPattern:** can hold wildcards or be nil if all entries should be returned.
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/// - **fileIndex:** The byte offset within the directory, indicating the position at which to resume the enumeration.
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init(fileId: FileId, infoClass: FileInformationEnum, flags: Flags, bufferLength: UInt32 = 65535, searchPattern: String? = nil, fileIndex: UInt32 = 0) {
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assert(FileInformationEnum.queryDirectory.contains(infoClass), "Invalid FileInformationClass used for QueryDirectoryRequest")
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let searchPatternOffset = searchPattern != nil ? MemoryLayout<SMB2.Header>.size + MemoryLayout<QueryDirectoryRequest.Header>.size : 0
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let nflags = flags.intersection(fileIndex > 0 ? [.INDEX_SPECIFIED] : [])
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let searchPatternLength = searchPattern?.data(using: .utf16)?.count ?? 0
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self.header = Header(size: 53, infoClass: infoClass, flags: nflags, fileIndex: fileIndex, fileId: fileId, searchPatternOffset: UInt8(searchPatternOffset), searchPatternLength: UInt8(searchPatternLength), bufferLength: bufferLength)
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self.searchPattern = searchPattern
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}
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func data() -> Data {
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var result = Data(value: header)
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if let patternData = searchPattern?.data(using: .utf16) {
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result.append(patternData)
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}
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return result
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}
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struct Header {
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let size: UInt8
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let infoClass: FileInformationEnum
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let flags: QueryDirectoryRequest.Flags
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let fileIndex: UInt32
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let fileId: FileId
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let searchPatternOffset: UInt8
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let searchPatternLength: UInt8
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let bufferLength: UInt32
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}
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struct Flags: OptionSet {
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let rawValue: UInt8
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init(rawValue: UInt8) {
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self.rawValue = rawValue
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}
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static let RESTART_SCANS = Flags(rawValue: 0x01)
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static let RETURN_SINGLE_ENTRY = Flags(rawValue: 0x02)
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static let INDEX_SPECIFIED = Flags(rawValue: 0x04)
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static let REOPEN = Flags(rawValue: 0x10)
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}
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}
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struct QueryDirectoryResponse: SMBResponseBody {
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let buffer: Data
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func parseAs(type: FileInformationEnum) -> [(header: SMB2FilesInformationHeader, fileName: String)] {
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var offset = 0
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var result = [(header: SMB2FilesInformationHeader, fileName: String)]()
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while true {
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let header: SMB2FilesInformationHeader
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switch type {
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case .fileDirectoryInformation:
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header = buffer.scanValue(start: offset) as FileDirectoryInformationHeader!
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case .fileFullDirectoryInformation:
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header = buffer.scanValue(start: offset) as FileFullDirectoryInformationHeader!
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case .fileIdFullDirectoryInformation:
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header = buffer.scanValue(start: offset) as FileIdFullDirectoryInformationHeader!
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case .fileBothDirectoryInformation:
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header = buffer.scanValue(start: offset) as FileBothDirectoryInformationHeader!
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case .fileIdBothDirectoryInformation:
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header = buffer.scanValue(start: offset) as FileIdBothDirectoryInformationHeader!
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case .fileNamesInformation:
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header = buffer.scanValue(start: offset) as FileNamesInformationHeader!
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default:
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return []
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}
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let headersize = MemoryLayout.size(ofValue: header)
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let fileName = buffer.scanString(start: headersize, length: Int(header.fileNameLength), using: .utf16) ?? ""
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result.append((header: header, fileName: fileName))
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if header.nextEntryOffset == 0 {
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break
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}
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offset += Int(header.nextEntryOffset)
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}
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return result
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}
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init? (data: Data) {
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let offset = Int(data.scanValue(start: 2) as UInt16!)
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let length = Int(data.scanValue(start: 4) as UInt32!)
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guard data.count > offset + length else {
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return nil
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}
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self.buffer = data.subdata(in: offset..<(offset + length))
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}
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}
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// MARK: SMB2 Query Info
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struct QueryInfoRequest: SMBRequestBody {
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let header: Header
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let buffer: Data?
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init(fileId: FileId, infoClass: FileInformationEnum, outputBufferLength: UInt32 = 65535) {
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self.header = Header(size: 41, infoType: 1, infoClass: infoClass.rawValue, outputBufferLength: outputBufferLength, inputBufferOffset: 0, reserved: 0, inputBufferLength: 0, additionalInformation: [], flags: [], fileId: fileId)
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self.buffer = nil
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}
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init(fileId: FileId, extendedAttributes: [String], flags: Flags = [], outputBufferLength: UInt32 = 65535) {
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var buffer = Data()
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for ea in extendedAttributes {
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guard let strData = ea.data(using: .ascii) else {
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continue
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}
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let strLength = UInt8(strData.count)
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let nextOffset = UInt32(4 + 1 + strData.count)
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var data = Data(value: nextOffset)
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data.append(Data(value: strLength))
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data.append(strData)
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data.count += 1
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let padSize = (data.count) % 4
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data.count += padSize
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buffer.append(data as Data)
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}
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let bufferOffset = UInt16(MemoryLayout<SMB2.Header>.size + MemoryLayout<QueryInfoRequest.Header>.size)
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self.header = Header(size: 41, infoType: 1, infoClass: FileInformationEnum.fileFullEaInformation.rawValue, outputBufferLength: outputBufferLength, inputBufferOffset: bufferOffset, reserved: 0, inputBufferLength: UInt32(buffer.count), additionalInformation: [], flags: flags, fileId: fileId)
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self.buffer = buffer as Data
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}
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init(fileId: FileId, infoClass: FileSystemInformationEnum, outputBufferLength: UInt32 = 65535) {
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self.header = Header(size: 41, infoType: 2, infoClass: infoClass.rawValue, outputBufferLength: outputBufferLength, inputBufferOffset: 0, reserved: 0, inputBufferLength: 0, additionalInformation: [], flags: [], fileId: fileId)
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self.buffer = nil
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}
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init(fileId: FileId, securityInfo: FileSecurityInfo, outputBufferLength: UInt32 = 65535) {
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self.header = Header(size: 41, infoType: 3, infoClass: 0, outputBufferLength: outputBufferLength, inputBufferOffset: 0, reserved: 0, inputBufferLength: 0, additionalInformation: securityInfo, flags: [], fileId: fileId)
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self.buffer = nil
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}
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// TODO: Implement QUOTA_INFO init
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func data() -> Data {
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var result = Data(value: header)
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if let buffer = buffer {
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result.append(buffer)
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}
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return result
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}
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struct Header {
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let size: UInt16
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let infoType: UInt8
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let infoClass: UInt8
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let outputBufferLength: UInt32
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let inputBufferOffset: UInt16
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fileprivate let reserved: UInt16
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let inputBufferLength: UInt32
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let additionalInformation: FileSecurityInfo
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let flags: QueryInfoRequest.Flags
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let fileId: FileId
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}
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struct Flags: OptionSet {
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let rawValue: UInt32
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init(rawValue: UInt32) {
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self.rawValue = rawValue
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}
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static let RESTART_SCAN = Flags(rawValue: 0x00000001)
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static let RETURN_SINGLE_ENTRY = Flags(rawValue: 0x00000002)
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static let INDEX_SPECIFIED = Flags(rawValue: 0x00000004)
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}
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}
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struct QueryInfoResponse: SMBResponseBody {
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let buffer: Data
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init?(data: Data) {
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let structSize: UInt16 = data.scanValue()!
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guard structSize == 9 else {
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return nil
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}
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/*let offsetData = data.subdataWithRange(NSRange(location: 2, length: 2))
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let offset: UInt16 = decode(offsetData)*/
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let length = Int(data.scanValue(start: 4) as UInt32!)
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guard data.count >= 8 + length else {
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return nil
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}
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self.buffer = data.subdata(in: 8..<(8 + length))
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}
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var asAccessInformation: FileAccessInformation {
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return buffer.scanValue()!
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}
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var asAlignmentInformation: FileAlignmentInformation {
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return buffer.scanValue()!
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}
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var asAllInformation: (header: FileAllInformationHeader, name: String) {
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let header: FileAllInformationHeader = buffer.scanValue()!
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let headersize = MemoryLayout<FileAllInformationHeader>.size
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let name = buffer.scanString(start: headersize, length: Int(header.nameLength), using: .utf16) ?? ""
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return (header, name)
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}
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var asAlternateNameInformation: String {
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return buffer.scanString(start: 0, length: buffer.count, using: .utf16) ?? ""
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}
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var asAttributeTagInformation: FileAttributeTagInformation {
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return buffer.scanValue()!
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}
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var asBasicInformation: FileBasicInformation {
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return buffer.scanValue()!
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}
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var asCompressionInformation: FileCompressionInformation {
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return buffer.scanValue()!
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}
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var asEaInformation: FileEaInformation {
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return buffer.scanValue()!
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}
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var asFullEaInformation: FileFullEaInformation {
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// TODO:
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return FileFullEaInformation()
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}
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var asInternalInformation: FileInternalInformation {
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return buffer.scanValue()!
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}
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var asModeInformation: FileModeInformation {
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return buffer.scanValue()!
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}
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var asNetworkOpenInformation: FileNetworkOpenInformation {
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return buffer.scanValue()!
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}
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var asPipeInformation: FilePipeInformation {
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return buffer.scanValue()!
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}
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var asPipeLocalInformation: FilePipeLocalInformation {
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return buffer.scanValue()!
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}
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var asPipeRemoteInformation: FilePipeRemoteInformation {
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return buffer.scanValue()!
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}
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var asPositionInformation: FilePositionInformation {
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return buffer.scanValue()!
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}
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var asStandardInformation: FileStandardInformation {
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return buffer.scanValue()!
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}
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var asStreamInformation: (header: FileStreamInformationHeader, name: String) {
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let header: FileStreamInformationHeader = buffer.scanValue()!
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let headersize = MemoryLayout<FileStreamInformationHeader>.size
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let name = buffer.scanString(start: headersize, length: Int(header.streamNameLength), using: .utf16) ?? ""
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return (header, name)
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}
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var asFsVolumeInformation: (header: FileFsVolumeInformationHeader, name: String) {
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let header: FileFsVolumeInformationHeader = buffer.scanValue()!
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let headersize = MemoryLayout<FileFsVolumeInformationHeader>.size
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let name = buffer.scanString(start: headersize, length: Int(header.labelLength), using: .utf16) ?? ""
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return (header, name)
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}
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var asFsSizeInformation: FileFsSizeInformation {
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return buffer.scanValue()!
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}
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var asFsDeviceInformation: FileFsDeviceInformation {
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return buffer.scanValue()!
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}
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var asFsAttributeInformation: (header: FileFsAttributeInformationHeader, name: String) {
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let header: FileFsAttributeInformationHeader = buffer.scanValue()!
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let headersize = MemoryLayout<FileFsAttributeInformationHeader>.size
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let name = buffer.scanString(start: headersize, length: Int(header.nameLength), using: .utf16) ?? ""
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return (header, name)
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}
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var asFsControlInformation: FileFsControlInformation {
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return buffer.scanValue()!
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}
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var asFsFullSizeInformation: FileFsFullSizeInformation {
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return buffer.scanValue()!
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}
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var asFsObjectIdInformation: FileFsObjectIdInformation {
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return buffer.scanValue()!
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}
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var asFsSectorSizeInformation: FileFsSectorSizeInformation {
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return buffer.scanValue()!
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}
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}
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}
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