diff options
Diffstat (limited to 'internal')
| -rw-r--r-- | internal/fusefrontend_reverse/reverse_longnames.go | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/internal/fusefrontend_reverse/reverse_longnames.go b/internal/fusefrontend_reverse/reverse_longnames.go index ec164f1..3bfe3af 100644 --- a/internal/fusefrontend_reverse/reverse_longnames.go +++ b/internal/fusefrontend_reverse/reverse_longnames.go @@ -17,7 +17,14 @@ import ( ) const ( - shortNameMax = 176 + // File names are padded to 16-byte multiples, encrypted and + // base64-encoded. We can encode at most 176 bytes to stay below the 255 + // bytes limit: + // * base64(176 bytes) = 235 bytes + // * base64(192 bytes) = 256 bytes (over 255!) + // But the PKCS#7 padding is at least one byte. This means we can only use + // 175 bytes for the file name. + shortNameMax = 175 ) var longnameParentCache map[string]string @@ -57,6 +64,7 @@ func (rfs *ReverseFS) findLongnameParent(dir string, dirIV []byte, longname stri } dirEntries, err := dirfd.Readdirnames(-1) if err != nil { + tlog.Warn.Printf("findLongnameParent: Readdirnames failed: %v\n", err) return "", err } longnameCacheLock.Lock() @@ -78,7 +86,6 @@ func (rfs *ReverseFS) findLongnameParent(dir string, dirIV []byte, longname stri if hit == "" { return "", syscall.ENOENT } - return hit, nil } |