59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
package secp
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import (
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"fmt"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/go-crypto"
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"github.com/filecoin-project/lotus/chain/types"
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"github.com/filecoin-project/lotus/lib/sigs"
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"github.com/minio/blake2b-simd"
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)
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type secpSigner struct{}
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func (secpSigner) GenPrivate() ([]byte, error) {
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priv, err := crypto.GenerateKey()
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if err != nil {
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return nil, err
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}
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return priv, nil
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}
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func (secpSigner) ToPublic(pk []byte) ([]byte, error) {
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return crypto.PublicKey(pk), nil
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}
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func (secpSigner) Sign(pk []byte, msg []byte) ([]byte, error) {
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b2sum := blake2b.Sum256(msg)
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sig, err := crypto.Sign(pk, b2sum[:])
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if err != nil {
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return nil, err
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}
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return sig, nil
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}
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func (secpSigner) Verify(sig []byte, a address.Address, msg []byte) error {
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b2sum := blake2b.Sum256(msg)
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pubk, err := crypto.EcRecover(b2sum[:], sig)
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if err != nil {
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return err
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}
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maybeaddr, err := address.NewSecp256k1Address(pubk)
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if err != nil {
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return err
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}
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if a != maybeaddr {
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return fmt.Errorf("signature did not match")
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}
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return nil
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}
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func init() {
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sigs.RegisterSignature(types.KTSecp256k1, secpSigner{})
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}
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