dione/sigs/ed25519/ed25519.go

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package ed25519
import (
"crypto/ed25519"
"golang.org/x/xerrors"
"github.com/libp2p/go-libp2p-core/peer"
"github.com/Secured-Finance/dione/sigs"
"github.com/Secured-Finance/dione/types"
)
type ed25519Signer struct{}
func (ed25519Signer) GenPrivate() ([]byte, error) {
_, privKey, err := ed25519.GenerateKey(nil)
if err != nil {
return nil, err
}
return privKey.Seed(), nil
}
func (ed25519Signer) ToPublic(priv []byte) ([]byte, error) {
var privKey ed25519.PrivateKey = priv
pubKey := privKey.Public().(ed25519.PublicKey)
return pubKey, nil
}
func (ed25519Signer) Sign(p []byte, msg []byte) ([]byte, error) {
var privKey ed25519.PrivateKey = p
return ed25519.Sign(privKey, msg), nil
}
func (ed25519Signer) Verify(sig []byte, a []byte, msg []byte) error {
id, err := peer.IDFromBytes(a)
if err != nil {
return err
}
pubKey, err := id.ExtractPublicKey()
if err != nil {
return err
}
pKeyRaw, err := pubKey.Raw()
if err != nil {
return err
}
if valid := ed25519.Verify(pKeyRaw, msg, sig); !valid {
return xerrors.Errorf("failed to verify signature")
}
return nil
}
func init() {
sigs.RegisterSignature(types.SigTypeEd25519, ed25519Signer{})
}