diff options
Diffstat (limited to 'internal/fusefrontend_reverse/node_xattr.go')
| -rw-r--r-- | internal/fusefrontend_reverse/node_xattr.go | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/internal/fusefrontend_reverse/node_xattr.go b/internal/fusefrontend_reverse/node_xattr.go index f22764a..9e99cfa 100644 --- a/internal/fusefrontend_reverse/node_xattr.go +++ b/internal/fusefrontend_reverse/node_xattr.go @@ -7,6 +7,7 @@ import ( "syscall" "github.com/rfjakob/gocryptfs/v2/internal/pathiv" + "github.com/rfjakob/gocryptfs/v2/internal/syscallcompat" ) // We store encrypted xattrs under this prefix plus the base64-encoded @@ -65,10 +66,18 @@ func (n *Node) Listxattr(ctx context.Context, dest []byte) (uint32, syscall.Errn if rn.args.NoXattr { return 0, 0 } - pNames, errno := n.listXAttr() + // Can use dest as a temporary buffer + sz, errno := n.listXAttr(dest) if errno != 0 { return 0, errno } + // If dest empty, return the required size + if len(dest) == 0 { + // Asssume ciphertext expansion by a factor of 2 + // TODO: double-check max expansion factor + return uint32(sz * 2), 0 + } + pNames := syscallcompat.ParseListxattrBlob(dest[:sz]) var buf bytes.Buffer for _, pName := range pNames { // ACLs are passed through without encryption |