lotus/lib/sigs/secp/init.go

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package secp
import (
"fmt"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-crypto"
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crypto2 "github.com/filecoin-project/go-state-types/crypto"
"github.com/minio/blake2b-simd"
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"github.com/filecoin-project/lotus/lib/sigs"
)
type secpSigner struct{}
func (secpSigner) GenPrivate() ([]byte, error) {
priv, err := crypto.GenerateKey()
if err != nil {
return nil, err
}
return priv, nil
}
func (secpSigner) ToPublic(pk []byte) ([]byte, error) {
return crypto.PublicKey(pk), nil
}
func (secpSigner) Sign(pk []byte, msg []byte) ([]byte, error) {
b2sum := blake2b.Sum256(msg)
sig, err := crypto.Sign(pk, b2sum[:])
if err != nil {
return nil, err
}
return sig, nil
}
func (secpSigner) Verify(sig []byte, a address.Address, msg []byte) error {
b2sum := blake2b.Sum256(msg)
pubk, err := crypto.EcRecover(b2sum[:], sig)
if err != nil {
return err
}
maybeaddr, err := address.NewSecp256k1Address(pubk)
if err != nil {
return err
}
if a != maybeaddr {
return fmt.Errorf("signature did not match")
}
return nil
}
func init() {
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sigs.RegisterSignature(crypto2.SigTypeSecp256k1, secpSigner{})
}