82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
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package fusefrontend_reverse
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import (
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"context"
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"syscall"
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"golang.org/x/sys/unix"
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"github.com/hanwen/go-fuse/v2/fs"
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"github.com/hanwen/go-fuse/v2/fuse"
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"github.com/rfjakob/gocryptfs/internal/configfile"
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"github.com/rfjakob/gocryptfs/internal/nametransform"
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"github.com/rfjakob/gocryptfs/internal/pathiv"
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"github.com/rfjakob/gocryptfs/internal/syscallcompat"
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)
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// Readdir - FUSE call.
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//
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// This function is symlink-safe through use of openBackingDir() and
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// ReadDirIVAt().
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func (n *Node) Readdir(ctx context.Context) (stream fs.DirStream, errno syscall.Errno) {
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dirfd, cName, errno := n.prepareAtSyscall("")
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if errno != 0 {
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return
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}
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defer syscall.Close(dirfd)
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// Read plaintext directory
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var entries []fuse.DirEntry
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fd, err := syscallcompat.Openat(dirfd, cName, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_NOFOLLOW, 0)
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if err != nil {
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return nil, fs.ToErrno(err)
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}
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defer syscall.Close(fd)
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entries, err = syscallcompat.Getdents(fd)
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if err != nil {
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return nil, fs.ToErrno(err)
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}
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rn := n.rootNode()
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if rn.args.PlaintextNames {
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panic("todo")
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}
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// Filter out excluded entries
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//TODO
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//entries = rfs.excludeDirEntries(relPath, entries)
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// Virtual files: at least one gocryptfs.diriv file
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virtualFiles := []fuse.DirEntry{
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{Mode: virtualFileMode, Name: nametransform.DirIVFilename},
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}
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cipherPath := n.Path()
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dirIV := pathiv.Derive(cipherPath, pathiv.PurposeDirIV)
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// Encrypt names
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for i := range entries {
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var cName string
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// ".gocryptfs.reverse.conf" in the root directory is mapped to "gocryptfs.conf"
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if n.isRoot() && entries[i].Name == configfile.ConfReverseName &&
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!rn.args.ConfigCustom {
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cName = configfile.ConfDefaultName
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} else {
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cName = rn.nameTransform.EncryptName(entries[i].Name, dirIV)
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if len(cName) > unix.NAME_MAX {
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cName = rn.nameTransform.HashLongName(cName)
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dotNameFile := fuse.DirEntry{
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Mode: virtualFileMode,
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Name: cName + nametransform.LongNameSuffix,
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}
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virtualFiles = append(virtualFiles, dotNameFile)
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}
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}
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entries[i].Name = cName
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}
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// Add virtual files
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entries = append(entries, virtualFiles...)
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return fs.NewListDirStream(entries), 0
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}
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