From 7ffce028d04a6b13ef762e2b89c34b688e8ca59d Mon Sep 17 00:00:00 2001 From: Mounir IDRASSI Date: Sat, 31 May 2014 18:44:53 +0200 Subject: Add TrueCrypt 7.1a MacOSX/Linux specific source files. --- src/Core/Unix/CoreUnix.cpp | 618 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 618 insertions(+) create mode 100644 src/Core/Unix/CoreUnix.cpp (limited to 'src/Core/Unix/CoreUnix.cpp') diff --git a/src/Core/Unix/CoreUnix.cpp b/src/Core/Unix/CoreUnix.cpp new file mode 100644 index 00000000..89f34e20 --- /dev/null +++ b/src/Core/Unix/CoreUnix.cpp @@ -0,0 +1,618 @@ +/* + Copyright (c) 2008-2010 TrueCrypt Developers Association. All rights reserved. + + Governed by the TrueCrypt License 3.0 the full text of which is contained in + the file License.txt included in TrueCrypt binary and source code distribution + packages. +*/ + +#include "CoreUnix.h" +#include +#include +#include +#include +#include +#include +#include +#include "Platform/FileStream.h" +#include "Driver/Fuse/FuseService.h" +#include "Volume/VolumePasswordCache.h" + +namespace TrueCrypt +{ + CoreUnix::CoreUnix () + { + signal (SIGPIPE, SIG_IGN); + + char *loc = setlocale (LC_ALL, ""); + if (!loc || string (loc) == "C") + setlocale (LC_ALL, "en_US.UTF-8"); + } + + CoreUnix::~CoreUnix () + { + } + + void CoreUnix::CheckFilesystem (shared_ptr mountedVolume, bool repair) const + { + if (!mountedVolume->MountPoint.IsEmpty()) + DismountFilesystem (mountedVolume->MountPoint, false); + + list args; + + args.push_back ("-T"); + args.push_back ("fsck"); + + args.push_back ("-e"); + + string xargs = "fsck "; + +#ifdef TC_LINUX + if (!repair) + xargs += "-n "; + else + xargs += "-r "; +#endif + + xargs += string (mountedVolume->VirtualDevice) + "; echo '[Done]'; read W"; + args.push_back (xargs); + + try + { + Process::Execute ("xterm", args, 1000); + } catch (TimeOut&) { } + } + + void CoreUnix::DismountFilesystem (const DirectoryPath &mountPoint, bool force) const + { + list args; + +#ifdef TC_MACOSX + if (force) + args.push_back ("-f"); +#endif + args.push_back ("--"); + args.push_back (mountPoint); + + Process::Execute ("umount", args); + } + + shared_ptr CoreUnix::DismountVolume (shared_ptr mountedVolume, bool ignoreOpenFiles, bool syncVolumeInfo) + { + if (!mountedVolume->MountPoint.IsEmpty()) + { + DismountFilesystem (mountedVolume->MountPoint, ignoreOpenFiles); + + // Delete mount directory if a default path has been used + if (string (mountedVolume->MountPoint).find (GetDefaultMountPointPrefix()) == 0) + mountedVolume->MountPoint.Delete(); + } + + try + { + DismountNativeVolume (mountedVolume); + } + catch (NotApplicable &) { } + + if (!mountedVolume->LoopDevice.IsEmpty()) + { + try + { + DetachLoopDevice (mountedVolume->LoopDevice); + } + catch (ExecutedProcessFailed&) { } + } + + if (syncVolumeInfo || mountedVolume->Protection == VolumeProtection::HiddenVolumeReadOnly) + { + sync(); + VolumeInfoList ml = GetMountedVolumes (mountedVolume->Path); + + if (ml.size() > 0) + mountedVolume = ml.front(); + } + + list args; + args.push_back ("--"); + args.push_back (mountedVolume->AuxMountPoint); + + for (int t = 0; true; t++) + { + try + { + Process::Execute ("umount", args); + break; + } + catch (ExecutedProcessFailed&) + { + if (t > 10) + throw; + Thread::Sleep (200); + } + } + + try + { + mountedVolume->AuxMountPoint.Delete(); + } + catch (...) { } + + VolumeEventArgs eventArgs (mountedVolume); + VolumeDismountedEvent.Raise (eventArgs); + + return mountedVolume; + } + + bool CoreUnix::FilesystemSupportsLargeFiles (const FilePath &filePath) const + { + string path = filePath; + size_t pos; + + while ((pos = path.find_last_of ('/')) != string::npos) + { + path = path.substr (0, pos); + + if (path.empty()) + break; + + try + { + MountedFilesystemList filesystems = GetMountedFilesystems (DevicePath(), path); + if (!filesystems.empty()) + { + const MountedFilesystem &fs = *filesystems.front(); + + if (fs.Type == "fat" + || fs.Type == "fat32" + || fs.Type == "vfat" + || fs.Type == "fatfs" + || fs.Type == "msdos" + || fs.Type == "msdosfs" + || fs.Type == "umsdos" + || fs.Type == "dos" + || fs.Type == "dosfs" + || fs.Type == "pcfs" + ) + { + return false; + } + + return true; + } + } + catch (...) { } + } + + return true; // Prevent errors if the filesystem cannot be identified + } + + bool CoreUnix::FilesystemSupportsUnixPermissions (const DevicePath &devicePath) const + { + File device; + device.Open (devicePath); + + Buffer bootSector (device.GetDeviceSectorSize()); + device.SeekAt (0); + device.ReadCompleteBuffer (bootSector); + + byte *b = bootSector.Ptr(); + + return memcmp (b + 3, "NTFS", 4) != 0 + && memcmp (b + 54, "FAT", 3) != 0 + && memcmp (b + 82, "FAT32", 5) != 0 + && memcmp (b + 3, "EXFAT", 5) != 0; + } + + string CoreUnix::GetDefaultMountPointPrefix () const + { + const char *envPrefix = getenv ("TRUECRYPT_MOUNT_PREFIX"); + if (envPrefix && !string (envPrefix).empty()) + return envPrefix; + + if (FilesystemPath ("/media").IsDirectory()) + return "/media/truecrypt"; + + if (FilesystemPath ("/mnt").IsDirectory()) + return "/mnt/truecrypt"; + + return GetTempDirectory() + "/truecrypt_mnt"; + } + + uint32 CoreUnix::GetDeviceSectorSize (const DevicePath &devicePath) const + { + File dev; + dev.Open (devicePath); + return dev.GetDeviceSectorSize(); + } + + uint64 CoreUnix::GetDeviceSize (const DevicePath &devicePath) const + { + File dev; + dev.Open (devicePath); + return dev.Length(); + } + + DirectoryPath CoreUnix::GetDeviceMountPoint (const DevicePath &devicePath) const + { + DevicePath devPath = devicePath; +#ifdef TC_MACOSX + if (string (devPath).find ("/dev/rdisk") != string::npos) + devPath = string ("/dev/") + string (devicePath).substr (6); +#endif + MountedFilesystemList mountedFilesystems = GetMountedFilesystems (devPath); + + if (mountedFilesystems.size() < 1) + return DirectoryPath(); + + return mountedFilesystems.front()->MountPoint; + } + + VolumeInfoList CoreUnix::GetMountedVolumes (const VolumePath &volumePath) const + { + VolumeInfoList volumes; + + foreach_ref (const MountedFilesystem &mf, GetMountedFilesystems ()) + { + if (string (mf.MountPoint).find (GetFuseMountDirPrefix()) == string::npos) + continue; + + shared_ptr mountedVol; + try + { + shared_ptr controlFile (new File); + controlFile->Open (string (mf.MountPoint) + FuseService::GetControlPath()); + + shared_ptr controlFileStream (new FileStream (controlFile)); + mountedVol = Serializable::DeserializeNew (controlFileStream); + } + catch (...) + { + continue; + } + + if (!volumePath.IsEmpty() && wstring (mountedVol->Path).compare (volumePath) != 0) + continue; + + mountedVol->AuxMountPoint = mf.MountPoint; + + if (!mountedVol->VirtualDevice.IsEmpty()) + { + MountedFilesystemList mpl = GetMountedFilesystems (mountedVol->VirtualDevice); + + if (mpl.size() > 0) + mountedVol->MountPoint = mpl.front()->MountPoint; + } + + volumes.push_back (mountedVol); + + if (!volumePath.IsEmpty()) + break; + } + + return volumes; + } + + gid_t CoreUnix::GetRealGroupId () const + { + const char *env = getenv ("SUDO_GID"); + if (env) + { + try + { + string s (env); + return static_cast (StringConverter::ToUInt64 (s)); + } + catch (...) { } + } + + return getgid(); + } + + uid_t CoreUnix::GetRealUserId () const + { + const char *env = getenv ("SUDO_UID"); + if (env) + { + try + { + string s (env); + return static_cast (StringConverter::ToUInt64 (s)); + } + catch (...) { } + } + + return getuid(); + } + + string CoreUnix::GetTempDirectory () const + { + char *envDir = getenv ("TMPDIR"); + return envDir ? envDir : "/tmp"; + } + + bool CoreUnix::IsMountPointAvailable (const DirectoryPath &mountPoint) const + { + return GetMountedFilesystems (DevicePath(), mountPoint).size() == 0; + } + + void CoreUnix::MountFilesystem (const DevicePath &devicePath, const DirectoryPath &mountPoint, const string &filesystemType, bool readOnly, const string &systemMountOptions) const + { + if (GetMountedFilesystems (DevicePath(), mountPoint).size() > 0) + throw MountPointUnavailable (SRC_POS); + + list args; + string options; + + if (!filesystemType.empty()) + { +#ifdef TC_SOLARIS + args.push_back ("-F"); +#else + args.push_back ("-t"); +#endif + args.push_back (filesystemType); + } + + if (readOnly) + options = "-oro"; + + if (!systemMountOptions.empty()) + { + if (options.empty()) + options = "-o"; + else + options += ","; + + options += systemMountOptions; + } + + if (!options.empty()) + args.push_back (options); + + args.push_back ("--"); + args.push_back (devicePath); + args.push_back (mountPoint); + + Process::Execute ("mount", args); + } + + VolumeSlotNumber CoreUnix::MountPointToSlotNumber (const DirectoryPath &mountPoint) const + { + string mountPointStr (mountPoint); + if (mountPointStr.find (GetDefaultMountPointPrefix()) == 0) + { + try + { + return StringConverter::ToUInt32 (StringConverter::GetTrailingNumber (mountPointStr)); + } + catch (...) { } + } + return GetFirstFreeSlotNumber(); + } + + shared_ptr CoreUnix::MountVolume (MountOptions &options) + { + CoalesceSlotNumberAndMountPoint (options); + + if (IsVolumeMounted (*options.Path)) + throw VolumeAlreadyMounted (SRC_POS); + + Cipher::EnableHwSupport (!options.NoHardwareCrypto); + + shared_ptr volume; + + while (true) + { + try + { + volume = OpenVolume ( + options.Path, + options.PreserveTimestamps, + options.Password, + options.Keyfiles, + options.Protection, + options.ProtectionPassword, + options.ProtectionKeyfiles, + options.SharedAccessAllowed, + VolumeType::Unknown, + options.UseBackupHeaders, + options.PartitionInSystemEncryptionScope + ); + + options.Password.reset(); + } + catch (SystemException &e) + { + if (options.Protection != VolumeProtection::ReadOnly + && (e.GetErrorCode() == EROFS || e.GetErrorCode() == EACCES || e.GetErrorCode() == EPERM)) + { + // Read-only filesystem + options.Protection = VolumeProtection::ReadOnly; + continue; + } + + throw; + } + + break; + } + + if (options.Path->IsDevice()) + { + if (volume->GetFile()->GetDeviceSectorSize() != volume->GetSectorSize()) + throw ParameterIncorrect (SRC_POS); + +#if defined (TC_LINUX) + if (volume->GetSectorSize() != TC_SECTOR_SIZE_LEGACY) + { + if (options.Protection == VolumeProtection::HiddenVolumeReadOnly) + throw UnsupportedSectorSizeHiddenVolumeProtection(); + + if (options.NoKernelCrypto) + throw UnsupportedSectorSizeNoKernelCrypto(); + } +#endif + } + + // Find a free mount point for FUSE service + MountedFilesystemList mountedFilesystems = GetMountedFilesystems (); + string fuseMountPoint; + for (int i = 1; true; i++) + { + stringstream path; + path << GetTempDirectory() << "/" << GetFuseMountDirPrefix() << i; + FilesystemPath fsPath (path.str()); + + bool inUse = false; + + foreach_ref (const MountedFilesystem &mf, mountedFilesystems) + { + if (mf.MountPoint == path.str()) + { + inUse = true; + break; + } + } + + if (!inUse) + { + try + { + if (fsPath.IsDirectory()) + fsPath.Delete(); + + throw_sys_sub_if (mkdir (path.str().c_str(), S_IRUSR | S_IXUSR) == -1, path.str()); + + fuseMountPoint = fsPath; + break; + } + catch (...) + { + if (i > 255) + throw TemporaryDirectoryFailure (SRC_POS, StringConverter::ToWide (path.str())); + } + } + } + + try + { + FuseService::Mount (volume, options.SlotNumber, fuseMountPoint); + } + catch (...) + { + try + { + DirectoryPath (fuseMountPoint).Delete(); + } + catch (...) { } + throw; + } + + try + { + // Create a mount directory if a default path has been specified + bool mountDirCreated = false; + string mountPoint; + if (!options.NoFilesystem && options.MountPoint) + { + mountPoint = *options.MountPoint; + +#ifndef TC_MACOSX + if (mountPoint.find (GetDefaultMountPointPrefix()) == 0 && !options.MountPoint->IsDirectory()) + { + Directory::Create (*options.MountPoint); + try + { + throw_sys_sub_if (chown (mountPoint.c_str(), GetRealUserId(), GetRealGroupId()) == -1, mountPoint); + } catch (ParameterIncorrect&) { } + + mountDirCreated = true; + } +#endif + } + + try + { + try + { + MountVolumeNative (volume, options, fuseMountPoint); + } + catch (NotApplicable&) + { + MountAuxVolumeImage (fuseMountPoint, options); + } + } + catch (...) + { + if (mountDirCreated) + remove (mountPoint.c_str()); + throw; + } + } + catch (...) + { + try + { + VolumeInfoList mountedVolumes = GetMountedVolumes (*options.Path); + if (mountedVolumes.size() > 0) + { + shared_ptr mountedVolume (mountedVolumes.front()); + DismountVolume (mountedVolume); + } + } + catch (...) { } + throw; + } + + VolumeInfoList mountedVolumes = GetMountedVolumes (*options.Path); + if (mountedVolumes.size() != 1) + throw ParameterIncorrect (SRC_POS); + + VolumeEventArgs eventArgs (mountedVolumes.front()); + VolumeMountedEvent.Raise (eventArgs); + + return mountedVolumes.front(); + } + + void CoreUnix::MountAuxVolumeImage (const DirectoryPath &auxMountPoint, const MountOptions &options) const + { + DevicePath loopDev = AttachFileToLoopDevice (string (auxMountPoint) + FuseService::GetVolumeImagePath(), options.Protection == VolumeProtection::ReadOnly); + + try + { + FuseService::SendAuxDeviceInfo (auxMountPoint, loopDev, loopDev); + } + catch (...) + { + try + { + DetachLoopDevice (loopDev); + } + catch (...) { } + throw; + } + + if (!options.NoFilesystem && options.MountPoint && !options.MountPoint->IsEmpty()) + { + MountFilesystem (loopDev, *options.MountPoint, + StringConverter::ToSingle (options.FilesystemType), + options.Protection == VolumeProtection::ReadOnly, + StringConverter::ToSingle (options.FilesystemOptions)); + } + } + + void CoreUnix::SetFileOwner (const FilesystemPath &path, const UserId &owner) const + { + throw_sys_if (chown (string (path).c_str(), owner.SystemId, (gid_t) -1) == -1); + } + + DirectoryPath CoreUnix::SlotNumberToMountPoint (VolumeSlotNumber slotNumber) const + { + if (slotNumber < GetFirstSlotNumber() || slotNumber > GetLastSlotNumber()) + throw ParameterIncorrect (SRC_POS); + + stringstream s; + s << GetDefaultMountPointPrefix() << slotNumber; + return s.str(); + } +} -- cgit v1.2.3