if l := len(seed); l != seedSize { return nil, errors.New("ed25519: bad seed length: " + strconv.Itoa(l)) } copy(priv.seed[:], seed) precomputePrivateKey(priv) return priv, nil } func precomputePrivateKey(priv *PrivateKey) { hs := sha512.New() hs.Write(priv.seed[:]) h := hs.Sum(make([]byte, 0, sha512Size)) s, err := priv.s.SetBytesWithClamping(h[:32]) if err != nil { panic("ed25519: internal error: setting scalar failed") } A := (&edwards25519.Point{}).ScalarBaseMult(s) copy(priv.pub[:], A.Bytes())...

if l := len(seed); l != seedSize { return nil, errors.New("ed25519: bad seed length: " + strconv.Itoa(l)) } copy(priv.seed[:], seed) precomputePrivateKey(priv) return priv, nil } func precomputePrivateKey(priv *PrivateKey) { hs := sha512.New() hs.Write(priv.seed[:]) h := hs.Sum(make([]byte, 0, sha512Size)) s, err := priv.s.SetBytesWithClamping(h[:32]) if err != nil { panic("ed25519: internal error: setting scalar failed") } A := (&edwards25519.Point{}).ScalarBaseMult(s) copy(priv.pub[:], A.Bytes())...

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