11 // 20-byte SHA1 hash used for info and pieces.
12 type Hash [HashSize]byte
14 func (h Hash) Bytes() []byte {
18 func (h Hash) AsString() string {
22 func (h Hash) String() string {
26 func (h Hash) HexString() string {
27 return fmt.Sprintf("%x", h[:])
30 func (h *Hash) FromHexString(s string) (err error) {
31 if len(s) != 2*HashSize {
32 err = fmt.Errorf("hash hex string has bad length: %d", len(s))
35 n, err := hex.Decode(h[:], []byte(s))
45 func NewHashFromHex(s string) (h Hash) {
46 err := h.FromHexString(s)
53 func HashBytes(b []byte) (ret Hash) {
56 copy(ret[:], hasher.Sum(nil))