package secp import ( "fmt" "github.com/filecoin-project/go-address" "github.com/filecoin-project/go-crypto" crypto2 "github.com/filecoin-project/go-state-types/crypto" "github.com/minio/blake2b-simd" "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() { sigs.RegisterSignature(crypto2.SigTypeSecp256k1, secpSigner{}) }