func (tsd *Digest) Reset() {
tsd.headerBuffer.Reset()
tsd.currentBuffer.Reset()
tsd.digestStage = stageReadHeader
tsd.tarReader = new(tar.Reader)
tsd.entryHash = sha256.New()
tsd.sums = fileInfoSums{}
tsd.fileCounter = 0
tsd.bytesWritten = 0
tsd.currentFilename = ""
tsd.pad = 0
tsd.err = nil
}
func (tsd *Digest) Sum(extra []byte) []byte {
tsd.sums.SortBySums()
hasher := sha256.New()
if extra != nil {
hasher.Write(extra)
}
for _, fis := range tsd.sums {
hasher.Write([]byte(fis.Sum()))
}
return hasher.Sum(nil)
}
func (tsd *Digest) BlockSize() int {
return sha256.New().BlockSize()
}
func (tsd *Digest) Size() int {
return sha256.New().Size()
}