Opening plaintext names volumes
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parent
4d47306b29
commit
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GPG Key ID:
007F84120107191E
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@ -15,8 +15,8 @@ android {
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applicationId "sushi.hardcore.droidfs"
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minSdkVersion 21
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targetSdkVersion 29
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versionCode 9
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versionName "1.4.1"
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versionCode 10
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versionName "1.4.2"
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ndk {
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abiFilters 'x86_64', 'armeabi-v7a', 'arm64-v8a'
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@ -56,11 +56,11 @@ dependencies {
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implementation "com.github.bumptech.glide:glide:4.11.0"
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implementation "com.google.android.exoplayer:exoplayer-core:2.11.7"
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implementation "com.google.android.exoplayer:exoplayer-ui:2.11.7"
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implementation "androidx.biometric:biometric:1.0.1"
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implementation "androidx.biometric:biometric:1.1.0"
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def camerax_version = "1.0.0-rc01"
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def camerax_version = "1.1.0-alpha01"
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implementation "androidx.camera:camera-camera2:$camerax_version"
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implementation "androidx.camera:camera-lifecycle:$camerax_version"
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implementation "androidx.camera:camera-view:1.0.0-alpha20"
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implementation "androidx.camera:camera-extensions:1.0.0-alpha20"
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implementation "androidx.camera:camera-view:1.0.0-alpha21"
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implementation "androidx.camera:camera-extensions:1.0.0-alpha21"
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}
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@ -2,25 +2,25 @@ package main
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import (
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"C"
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"crypto/cipher"
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"crypto/aes"
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"syscall"
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"strings"
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"bytes"
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"unsafe"
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"os"
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"io"
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"crypto/aes"
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"crypto/cipher"
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"fmt"
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"path/filepath"
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"golang.org/x/sys/unix"
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"io"
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"os"
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"path/filepath"
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"strings"
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"syscall"
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"unsafe"
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"./gocryptfs_internal/cryptocore"
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"./gocryptfs_internal/stupidgcm"
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"./gocryptfs_internal/eme"
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"./gocryptfs_internal/nametransform"
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"./rewrites/syscallcompat"
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"./gocryptfs_internal/stupidgcm"
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"./rewrites/configfile"
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"./rewrites/contentenc"
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"./rewrites/syscallcompat"
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)
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const (
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@ -40,6 +40,7 @@ type File struct {
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type SessionVars struct {
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root_cipher_dir string
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plainTextNames bool
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nameTransform *nametransform.NameTransform
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cryptoCore *cryptocore.CryptoCore
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contentEnc *contentenc.ContentEnc
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@ -72,6 +73,16 @@ func clear_dirCache(sessionID int) {
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func openBackingDir(sessionID int, relPath string) (dirfd int, cName string, err error) {
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dirRelPath := nametransform.Dir(relPath)
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// With PlaintextNames, we don't need to read DirIVs. Easy.
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if sessions[sessionID].plainTextNames {
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dirfd, err = syscallcompat.OpenDirNofollow(sessions[sessionID].root_cipher_dir, dirRelPath)
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if err != nil {
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return -1, "", err
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}
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// If relPath is empty, cName is ".".
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cName = filepath.Base(relPath)
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return dirfd, cName, nil
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}
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dir, ok := sessions[sessionID].dirCache[dirRelPath]
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if ok {
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// If relPath is empty, cName is ".".
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@ -487,6 +498,9 @@ func init_new_session(root_cipher_dir string, masterkey []byte, cf *configfile.C
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}
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if err == nil {
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var new_session SessionVars
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new_session.plainTextNames = cf.IsFeatureFlagSet(configfile.FlagPlaintextNames)
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emeCipher = eme.New(emeBlockCipher)
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new_session.nameTransform = nametransform.New(emeCipher, true, true)
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@ -524,7 +538,7 @@ func init_new_session(root_cipher_dir string, masterkey []byte, cf *configfile.C
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if sessions == nil {
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sessions = make(map[int]SessionVars)
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}
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sessions[sessionID] = new_session;
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sessions[sessionID] = new_session
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return sessionID
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}
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return -1
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@ -614,11 +628,13 @@ func gcf_list_dir(sessionID int, dirName string) (*C.char, *C.int, C.int) {
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}
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// Get DirIV (stays nil if PlaintextNames is used)
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var cachedIV []byte
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if !sessions[sessionID].plainTextNames {
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// Read the DirIV from disk
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cachedIV, err = nametransform.ReadDirIVAt(fd)
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if err != nil {
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return nil, nil, 0
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}
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}
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// Decrypted directory entries
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var plain strings.Builder
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var modes []uint32
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@ -629,6 +645,11 @@ func gcf_list_dir(sessionID int, dirName string) (*C.char, *C.int, C.int) {
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// silently ignore "gocryptfs.conf" in the top level dir
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continue
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}
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if sessions[sessionID].plainTextNames {
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plain.WriteString(cipherEntries[i].Name + "\x00")
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modes = append(modes, cipherEntries[i].Mode)
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continue
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}
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if cName == nametransform.DirIVFilename {
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// silently ignore "gocryptfs.diriv" everywhere if dirIV is enabled
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continue
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@ -670,6 +691,18 @@ func gcf_mkdir(sessionID int, newPath string) bool {
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return false
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}
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defer syscall.Close(dirfd)
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if sessions[sessionID].plainTextNames {
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err = syscallcompat.Mkdirat(dirfd, cName, folder_mode)
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if err != nil {
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return false
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}
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var ust unix.Stat_t
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err = syscallcompat.Fstatat(dirfd, cName, &ust, unix.AT_SYMLINK_NOFOLLOW)
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if err != nil {
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return false
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}
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} else {
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// We need write and execute permissions to create gocryptfs.diriv.
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// Also, we need read permissions to open the directory (to avoid
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// race-conditions between getting and setting the mode).
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@ -718,6 +751,7 @@ func gcf_mkdir(sessionID int, newPath string) bool {
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return false
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}
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}
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}
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return true
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}
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@ -729,6 +763,11 @@ func gcf_rmdir(sessionID int, relPath string) bool {
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return false
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}
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defer syscall.Close(parentDirFd)
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if sessions[sessionID].plainTextNames {
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// Unlinkat with AT_REMOVEDIR is equivalent to Rmdir
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err = unix.Unlinkat(parentDirFd, cName, unix.AT_REMOVEDIR)
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return err_to_bool(err)
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}
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dirfd, err := syscallcompat.Openat(parentDirFd, cName, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_NOFOLLOW, 0)
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if err != nil {
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return false
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@ -797,7 +836,7 @@ func gcf_open_write_mode(sessionID int, path string) int {
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defer syscall.Close(dirfd)
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fd := -1
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// Handle long file name
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if nametransform.IsLongContent(cName) {
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if !sessions[sessionID].plainTextNames && nametransform.IsLongContent(cName) {
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// Create ".name"
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err = sessions[sessionID].nameTransform.WriteLongNameAt(dirfd, cName, path)
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if err != nil {
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@ -851,7 +890,7 @@ func gcf_close_file(sessionID, handleID int){
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func gcf_read_file(sessionID, handleID int, offset uint64, dst_buff []byte) uint32 {
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length := uint64(len(dst_buff))
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if length > contentenc.MAX_KERNEL_WRITE {
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return 0;
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return 0
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}
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out, _ := doRead(sessionID, handleID, dst_buff[:0], offset, length)
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@ -863,7 +902,7 @@ func gcf_read_file(sessionID, handleID int, offset uint64, dst_buff []byte) uint
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func gcf_write_file(sessionID, handleID int, offset uint64, data []byte) uint32 {
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length := uint64(len(data))
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if length > contentenc.MAX_KERNEL_WRITE {
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return 0;
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return 0
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}
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written, _ := doWrite(sessionID, handleID, data, offset)
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@ -899,6 +938,11 @@ func gcf_rename(sessionID int, oldPath string, newPath string) bool {
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return false
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}
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defer syscall.Close(newDirfd)
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// Easy case.
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if sessions[sessionID].plainTextNames {
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return err_to_bool(syscallcompat.Renameat(oldDirfd, oldCName, newDirfd, newCName))
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}
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// Long destination file name: create .name file
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nameFileAlreadyThere := false
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if nametransform.IsLongContent(newCName) {
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@ -950,7 +994,7 @@ func gcf_remove_file(sessionID int, path string) bool {
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return false
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}
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// Delete ".name" file
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if nametransform.IsLongContent(cName) {
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if !sessions[sessionID].plainTextNames && nametransform.IsLongContent(cName) {
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err = nametransform.DeleteLongNameAt(dirfd, cName)
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}
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return err_to_bool(err)
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