func (a *acdb) walk(path string, info os.FileInfo, errIn error) error {
a.Log(acd.DebugLoud, "[TRC] walk")
if errIn != nil {
fmt.Printf("skipping %v error: %v\n", path, errIn)
return nil
}
var (
payload []byte
digest *[sha256.Size]byte
err error
)
switch {
case info.Mode()&os.ModeDir == os.ModeDir:
// dir
err = a.me.Dir(path, info)
if err != nil {
break
}
case info.Mode()&os.ModeSymlink == os.ModeSymlink:
// symlink
err = a.me.Symlink(path, info)
if err != nil {
break
}
case info.Mode().IsRegular() && info.Size() == 0:
// zero sized file
err = a.me.File(path, info, "", nil)
if err != nil {
break
}
case info.Mode().IsRegular():
// regular file
// external pointer AND digest
digest, err = goutil.FileHMACSHA256(path, a.keys.Dedup[:])
if err != nil {
break
}
payload, err = shared.FileNaClEncrypt(path, a.compress,
&a.keys.Data)
if err != nil {
break
}
mime, _, err := goutil.FileCompressible(path)
if err != nil {
break
}
err = a.me.File(path, info, mime, digest)
if err != nil {
break
}
default:
fmt.Printf("skipping %v: unsuported file type\n", path)
return nil
}
if err != nil {
fmt.Printf("skipping %v: %v\n", path, err)
return nil
}
var d, ds string
if digest != nil {
d = hex.EncodeToString(digest[:])
}
if digest != nil {
asset, err := a.c.UploadJSON(a.dataID, d, payload)
if err != nil {
if e, ok := acd.IsCombinedError(err); ok {
if e.StatusCode != http.StatusConflict {
fmt.Printf("skipping %v: %v\n",
path, err)
return nil
}
ds += " deduped "
} else {
fmt.Printf("should not happen %T: %v\n",
err, err)
return nil
}
} else {
ds += " new "
}
_ = asset
}
if a.verbose {
if digest != nil {
ds += "=> " + d
}
fmt.Printf("%v %15v %v%v\n",
info.Mode(),
info.Size(),
path,
ds)
}
return nil
}
func FileNaClEncrypt(filename string, compress bool,
key *[KeySize]byte) ([]byte, error) {
fd, err := goutil.FileSHA256(filename)
if err != nil {
return nil, err
}
// test compressible
var comp bool
payloadHeader := Header{
Version: Version,
Digest: *fd,
Compression: CompNone,
}
payloadHeader.MimeType, comp, err = goutil.FileCompressible(filename)
if err != nil {
return nil, err
}
if compress {
if comp {
payloadHeader.Compression = CompGZIP
}
} else {
comp = false
}
// set up reader
f, err := os.Open(filename)
if err != nil {
return nil, err
}
defer func() { _ = f.Close() }()
fi, err := f.Stat()
if err != nil {
return nil, err
}
payloadHeader.Size = uint64(fi.Size())
// encode payload [nonce][blob]
var payload bytes.Buffer
pw := bufio.NewWriter(&payload)
// nonce
nonce, err := NaClNonce()
if err != nil {
return nil, err
}
_, err = pw.Write(nonce[:])
if err != nil {
return nil, err
}
// create payload
var b bytes.Buffer
// can't encode directly into b because of appended 0x0a
_, err = xdr.Marshal(&b, payloadHeader)
if err != nil {
return nil, err
}
var w io.Writer
if comp {
// per https://github.com/klauspost/pgzip use pgzip on > 1MB
if fi.Size() > 1024*1024 {
w = pgzip.NewWriter(&b)
} else {
w = gzip.NewWriter(&b)
}
} else {
w = bufio.NewWriter(&b)
}
// file content
_, err = io.Copy(w, f)
if err != nil {
return nil, err
}
_, ok := w.(io.WriteCloser)
if ok {
w.(io.WriteCloser).Close()
} else {
w.(*bufio.Writer).Flush()
}
// encrypt
encryptedPayload := secretbox.Seal(nil, b.Bytes(), nonce, key)
// append encryptedPayload to payload
pw.Write(encryptedPayload)
pw.Flush()
return payload.Bytes(), nil
}
