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Diffstat (limited to 'cryptfs/names_diriv.go')
-rw-r--r--cryptfs/names_diriv.go27
1 files changed, 18 insertions, 9 deletions
diff --git a/cryptfs/names_diriv.go b/cryptfs/names_diriv.go
index 2e2429e..9519ebc 100644
--- a/cryptfs/names_diriv.go
+++ b/cryptfs/names_diriv.go
@@ -1,6 +1,7 @@
package cryptfs
import (
+ "os"
"fmt"
"io/ioutil"
"path/filepath"
@@ -49,16 +50,24 @@ func (c *DirIVCache) Clear() {
}
// readDirIV - read the "gocryptfs.diriv" file from "dir" (absolute ciphertext path)
-func (be *CryptFS) ReadDirIV(dir string) (iv []byte, err error) {
+func (be *CryptFS) ReadDirIV(dir string) (iv []byte, readErr error) {
ivfile := filepath.Join(dir, DIRIV_FILENAME)
- Debug.Printf("readDirIV: reading %s\n", ivfile)
- iv, err = ioutil.ReadFile(ivfile)
- if err != nil {
- Warn.Printf("readDirIV: %v\n", err)
- return nil, err
+ Debug.Printf("ReadDirIV: reading %s\n", ivfile)
+ iv, readErr = ioutil.ReadFile(ivfile)
+ if readErr != nil {
+ // The directory may have been concurrently deleted or moved. Failure to
+ // read the diriv is not an error in that case.
+ _, statErr := os.Stat(dir)
+ if os.IsNotExist(statErr) {
+ Debug.Printf("ReadDirIV: Dir %s was deleted under our feet", dir)
+ } else {
+ // This should not happen
+ Warn.Printf("ReadDirIV: Dir exists but diriv does not: %v\n", readErr)
+ }
+ return nil, readErr
}
if len(iv) != DIRIV_LEN {
- return nil, fmt.Errorf("readDirIV: Invalid length %d\n", len(iv))
+ return nil, fmt.Errorf("ReadDirIV: Invalid length %d\n", len(iv))
}
return iv, nil
}
@@ -73,7 +82,7 @@ func WriteDirIV(dir string) error {
return ioutil.WriteFile(file, iv, 0444)
}
-// EncryptPathDirIV - encrypt path using CBC or EME with DirIV
+// EncryptPathDirIV - encrypt path using EME with DirIV
func (be *CryptFS) EncryptPathDirIV(plainPath string, rootDir string, eme bool) (cipherPath string, err error) {
// Empty string means root directory
if plainPath == "" {
@@ -109,7 +118,7 @@ func (be *CryptFS) EncryptPathDirIV(plainPath string, rootDir string, eme bool)
return cipherPath, nil
}
-// DecryptPathDirIV - encrypt path using CBC or EME with DirIV
+// DecryptPathDirIV - decrypt path using EME with DirIV
func (be *CryptFS) DecryptPathDirIV(encryptedPath string, rootDir string, eme bool) (string, error) {
var wd = rootDir
var plainNames []string