63 lines
2.0 KiB
Go
63 lines
2.0 KiB
Go
package consensus
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import (
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"golang.org/x/xerrors"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/go-state-types/crypto"
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"github.com/filecoin-project/go-state-types/network"
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"github.com/filecoin-project/lotus/chain/types"
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"github.com/filecoin-project/lotus/chain/types/ethtypes"
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"github.com/filecoin-project/lotus/lib/sigs"
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)
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// AuthenticateMessage authenticates the message by verifying that the supplied
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// SignedMessage was signed by the indicated Address, computing the correct
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// signature payload depending on the signature type. The supplied Address type
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// must be recognized by the registered verifier for the signature type.
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func AuthenticateMessage(msg *types.SignedMessage, signer address.Address) error {
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var digest []byte
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typ := msg.Signature.Type
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switch typ {
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case crypto.SigTypeDelegated:
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txArgs, err := ethtypes.EthTxArgsFromUnsignedEthMessage(&msg.Message)
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if err != nil {
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return xerrors.Errorf("failed to reconstruct eth transaction: %w", err)
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}
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roundTripMsg, err := txArgs.ToUnsignedMessage(msg.Message.From)
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if err != nil {
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return xerrors.Errorf("failed to reconstruct filecoin msg: %w", err)
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}
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if !msg.Message.Equals(roundTripMsg) {
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return xerrors.New("ethereum tx failed to roundtrip")
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}
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rlpEncodedMsg, err := txArgs.ToRlpUnsignedMsg()
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if err != nil {
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return xerrors.Errorf("failed to repack eth rlp message: %w", err)
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}
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digest = rlpEncodedMsg
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default:
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digest = msg.Message.Cid().Bytes()
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}
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if err := sigs.Verify(&msg.Signature, signer, digest); err != nil {
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return xerrors.Errorf("message %s has invalid signature (type %d): %w", msg.Cid(), typ, err)
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}
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return nil
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}
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// IsValidSecpkSigType checks that a signature type is valid for the network
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// version, for a "secpk" message.
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func IsValidSecpkSigType(nv network.Version, typ crypto.SigType) bool {
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switch {
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case nv < network.Version18:
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return typ == crypto.SigTypeSecp256k1
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default:
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return typ == crypto.SigTypeSecp256k1 || typ == crypto.SigTypeDelegated
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}
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}
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