From fcb28e4ff35e6bc262bfda23f3779ef3a8e7708a Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Thu, 15 Oct 2020 23:18:21 +0200
Subject: v2pai: delete fusefrontend_reverse_v1api

Served its mission a copy-paste source but can now be deleted.
---
 internal/fusefrontend_reverse_v1api/rpath.go | 113 ---------------------------
 1 file changed, 113 deletions(-)
 delete mode 100644 internal/fusefrontend_reverse_v1api/rpath.go

(limited to 'internal/fusefrontend_reverse_v1api/rpath.go')

diff --git a/internal/fusefrontend_reverse_v1api/rpath.go b/internal/fusefrontend_reverse_v1api/rpath.go
deleted file mode 100644
index 2da8379..0000000
--- a/internal/fusefrontend_reverse_v1api/rpath.go
+++ /dev/null
@@ -1,113 +0,0 @@
-package fusefrontend_reverse
-
-import (
-	"encoding/base64"
-	"path/filepath"
-	"strings"
-	"syscall"
-
-	"github.com/rfjakob/gocryptfs/internal/nametransform"
-	"github.com/rfjakob/gocryptfs/internal/pathiv"
-	"github.com/rfjakob/gocryptfs/internal/syscallcompat"
-	"github.com/rfjakob/gocryptfs/internal/tlog"
-)
-
-// abs basically returns storage dir + "/" + relPath.
-// It takes an error parameter so it can directly wrap decryptPath like this:
-// a, err := rfs.abs(rfs.decryptPath(relPath))
-// abs never generates an error on its own. In other words, abs(p, nil) never
-// fails.
-func (rfs *ReverseFS) abs(relPath string, err error) (string, error) {
-	if err != nil {
-		return "", err
-	}
-	return filepath.Join(rfs.args.Cipherdir, relPath), nil
-}
-
-// rDecryptName decrypts the ciphertext name "cName", given the dirIV of the
-// directory "cName" lies in. The relative plaintext path to the directory
-// "pDir" is used if a "gocryptfs.longname.XYZ.name" must be resolved.
-func (rfs *ReverseFS) rDecryptName(cName string, dirIV []byte, pDir string) (pName string, err error) {
-	nameType := nametransform.NameType(cName)
-	if nameType == nametransform.LongNameNone {
-		pName, err = rfs.nameTransform.DecryptName(cName, dirIV)
-		if err != nil {
-			// We get lots of decrypt requests for names like ".Trash" that
-			// are invalid base64. Convert them to ENOENT so the correct
-			// error gets returned to the user.
-			if _, ok := err.(base64.CorruptInputError); ok {
-				return "", syscall.ENOENT
-			}
-			// Stat attempts on the link target of encrypted symlinks.
-			// These are always valid base64 but the length is not a
-			// multiple of 16.
-			if err == syscall.EBADMSG {
-				return "", syscall.ENOENT
-			}
-			return "", err
-		}
-	} else if nameType == nametransform.LongNameContent {
-		pName, err = rfs.findLongnameParent(pDir, dirIV, cName)
-		if err != nil {
-			return "", err
-		}
-	} else {
-		// It makes no sense to decrypt a ".name" file. This is a virtual file
-		// that has no representation in the plaintext filesystem. ".name"
-		// files should have already been handled in virtualfile.go.
-		tlog.Warn.Printf("rDecryptName: cannot decrypt virtual file %q", cName)
-		return "", syscall.EINVAL
-	}
-	return pName, nil
-}
-
-// decryptPath decrypts a relative ciphertext path to a relative plaintext
-// path.
-func (rfs *ReverseFS) decryptPath(relPath string) (string, error) {
-	if rfs.args.PlaintextNames || relPath == "" {
-		return relPath, nil
-	}
-	// Check if the parent dir is in the cache
-	cDir := nametransform.Dir(relPath)
-	dirIV, pDir := rPathCache.lookup(cDir)
-	if dirIV != nil {
-		cName := filepath.Base(relPath)
-		pName, err := rfs.rDecryptName(cName, dirIV, pDir)
-		if err != nil {
-			return "", err
-		}
-		return filepath.Join(pDir, pName), nil
-	}
-	parts := strings.Split(relPath, "/")
-	var transformedParts []string
-	for i := range parts {
-		// Start at the top and recurse
-		currentCipherDir := filepath.Join(parts[:i]...)
-		currentPlainDir := filepath.Join(transformedParts[:i]...)
-		dirIV = pathiv.Derive(currentCipherDir, pathiv.PurposeDirIV)
-		transformedPart, err := rfs.rDecryptName(parts[i], dirIV, currentPlainDir)
-		if err != nil {
-			return "", err
-		}
-		transformedParts = append(transformedParts, transformedPart)
-	}
-	pRelPath := filepath.Join(transformedParts...)
-	rPathCache.store(cDir, dirIV, nametransform.Dir(pRelPath))
-	return pRelPath, nil
-}
-
-// openBackingDir receives an already decrypted relative path
-// "pRelPath", opens the directory that contains the target file/dir
-// and returns the fd to the directory and the decrypted name of the
-// target file. The fd/name pair is intended for use with fchownat and
-// friends.
-func (rfs *ReverseFS) openBackingDir(pRelPath string) (dirfd int, pName string, err error) {
-	// Open directory, safe against symlink races
-	pDir := filepath.Dir(pRelPath)
-	dirfd, err = syscallcompat.OpenDirNofollow(rfs.args.Cipherdir, pDir)
-	if err != nil {
-		return -1, "", err
-	}
-	pName = filepath.Base(pRelPath)
-	return dirfd, pName, nil
-}
-- 
cgit v1.2.3