diff --git a/keychain/btcwallet.go b/keychain/btcwallet.go index 90378a3ee2..97dfdc89e9 100644 --- a/keychain/btcwallet.go +++ b/keychain/btcwallet.go @@ -462,8 +462,8 @@ func (b *BtcWalletKeyRing) SignMessageCompact(keyLoc KeyLocator, // // NOTE: This is part of the keychain.MessageSignerRing interface. func (b *BtcWalletKeyRing) SignMessageSchnorr(keyLoc KeyLocator, - msg []byte, doubleHash bool, taprootTweak []byte) (*schnorr.Signature, - error) { + msg []byte, doubleHash bool, noHash bool, taprootTweak []byte, + ) (*schnorr.Signature, error) { privKey, err := b.DerivePrivKey(KeyDescriptor{ KeyLocator: keyLoc, @@ -477,7 +477,9 @@ func (b *BtcWalletKeyRing) SignMessageSchnorr(keyLoc KeyLocator, } var digest []byte - if doubleHash { + if noHash { + digest = msg + } else if doubleHash { digest = chainhash.DoubleHashB(msg) } else { digest = chainhash.HashB(msg) diff --git a/keychain/derivation.go b/keychain/derivation.go index 21996c6509..46760dd6d4 100644 --- a/keychain/derivation.go +++ b/keychain/derivation.go @@ -239,8 +239,8 @@ type MessageSignerRing interface { // hashing it first, with the private key described in the key locator // and the optional Taproot tweak applied to the private key. SignMessageSchnorr(keyLoc KeyLocator, msg []byte, - doubleHash bool, taprootTweak []byte) (*schnorr.Signature, - error) + doubleHash bool, noHash bool, taprootTweak []byte, + ) (*schnorr.Signature, error) } // SingleKeyMessageSigner is an abstraction interface that hides the diff --git a/lnrpc/signrpc/signer.pb.go b/lnrpc/signrpc/signer.pb.go index 08980f264e..2959d864c4 100644 --- a/lnrpc/signrpc/signer.pb.go +++ b/lnrpc/signrpc/signer.pb.go @@ -696,15 +696,18 @@ type SignMessageReq struct { KeyLoc *KeyLocator `protobuf:"bytes,2,opt,name=key_loc,json=keyLoc,proto3" json:"key_loc,omitempty"` // Double-SHA256 hash instead of just the default single round. DoubleHash bool `protobuf:"varint,3,opt,name=double_hash,json=doubleHash,proto3" json:"double_hash,omitempty"` + // Don't hash the message before signing it. This option is only available + // when using a Schnorr signature. + NoHash bool `protobuf:"varint,4,opt,name=no_hash,json=noHash,proto3" json:"no_hash,omitempty"` // Use the compact (pubkey recoverable) format instead of the raw lnwire // format. This option cannot be used with Schnorr signatures. - CompactSig bool `protobuf:"varint,4,opt,name=compact_sig,json=compactSig,proto3" json:"compact_sig,omitempty"` + CompactSig bool `protobuf:"varint,5,opt,name=compact_sig,json=compactSig,proto3" json:"compact_sig,omitempty"` // Use Schnorr signature. This option cannot be used with compact format. - SchnorrSig bool `protobuf:"varint,5,opt,name=schnorr_sig,json=schnorrSig,proto3" json:"schnorr_sig,omitempty"` + SchnorrSig bool `protobuf:"varint,6,opt,name=schnorr_sig,json=schnorrSig,proto3" json:"schnorr_sig,omitempty"` // The optional Taproot tweak bytes to apply to the private key before creating // a Schnorr signature. The private key is tweaked as described in BIP-341: // privKey + h_tapTweak(internalKey || tapTweak) - SchnorrSigTapTweak []byte `protobuf:"bytes,6,opt,name=schnorr_sig_tap_tweak,json=schnorrSigTapTweak,proto3" json:"schnorr_sig_tap_tweak,omitempty"` + SchnorrSigTapTweak []byte `protobuf:"bytes,7,opt,name=schnorr_sig_tap_tweak,json=schnorrSigTapTweak,proto3" json:"schnorr_sig_tap_tweak,omitempty"` } func (x *SignMessageReq) Reset() { @@ -760,6 +763,13 @@ func (x *SignMessageReq) GetDoubleHash() bool { return false } +func (x *SignMessageReq) GetNoHash() bool { + if x != nil { + return x.NoHash + } + return false +} + func (x *SignMessageReq) GetCompactSig() bool { if x != nil { return x.CompactSig @@ -2065,243 +2075,245 @@ var file_signrpc_signer_proto_rawDesc = []byte{ 0x69, 0x6e, 0x70, 0x75, 0x74, 0x5f, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x73, 0x69, 0x67, 0x6e, 0x72, 0x70, 0x63, 0x2e, 0x49, 0x6e, 0x70, 0x75, 0x74, 0x53, 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This option is only available + // when using a Schnorr signature. + bool no_hash = 4; + /* Use the compact (pubkey recoverable) format instead of the raw lnwire format. This option cannot be used with Schnorr signatures. */ - bool compact_sig = 4; + bool compact_sig = 5; /* Use Schnorr signature. This option cannot be used with compact format. */ - bool schnorr_sig = 5; + bool schnorr_sig = 6; /* The optional Taproot tweak bytes to apply to the private key before creating a Schnorr signature. The private key is tweaked as described in BIP-341: privKey + h_tapTweak(internalKey || tapTweak) */ - bytes schnorr_sig_tap_tweak = 6; + bytes schnorr_sig_tap_tweak = 7; } message SignMessageResp { /* diff --git a/lnrpc/signrpc/signer.swagger.json b/lnrpc/signrpc/signer.swagger.json index b1f511097d..0d85c4c707 100644 --- a/lnrpc/signrpc/signer.swagger.json +++ b/lnrpc/signrpc/signer.swagger.json @@ -808,6 +808,10 @@ "type": "boolean", "description": "Double-SHA256 hash instead of just the default single round." }, + "no_hash": { + "type": "boolean", + "description": "Don't hash the message before signing it. This option is only available\nwhen using a Schnorr signature." + }, "compact_sig": { "type": "boolean", "description": "Use the compact (pubkey recoverable) format instead of the raw lnwire\nformat. This option cannot be used with Schnorr signatures." diff --git a/lnrpc/signrpc/signer_server.go b/lnrpc/signrpc/signer_server.go index a8f2acf2ae..9849c45c9a 100644 --- a/lnrpc/signrpc/signer_server.go +++ b/lnrpc/signrpc/signer_server.go @@ -615,7 +615,7 @@ func (s *Server) SignMessage(_ context.Context, // Use the schnorr signature algorithm to sign the message. if in.SchnorrSig { sig, err := s.cfg.KeyRing.SignMessageSchnorr( - keyLocator, in.Msg, in.DoubleHash, + keyLocator, in.Msg, in.DoubleHash, in.NoHash, in.SchnorrSigTapTweak, ) if err != nil { diff --git a/lnwallet/rpcwallet/rpcwallet.go b/lnwallet/rpcwallet/rpcwallet.go index 69e1f25b76..84678c99d9 100644 --- a/lnwallet/rpcwallet/rpcwallet.go +++ b/lnwallet/rpcwallet/rpcwallet.go @@ -513,8 +513,8 @@ func (r *RPCKeyRing) SignMessageCompact(keyLoc keychain.KeyLocator, // // NOTE: This method is part of the keychain.MessageSignerRing interface. func (r *RPCKeyRing) SignMessageSchnorr(keyLoc keychain.KeyLocator, - msg []byte, doubleHash bool, taprootTweak []byte) (*schnorr.Signature, - error) { + msg []byte, doubleHash bool, noHash bool, taprootTweak []byte, + ) (*schnorr.Signature, error) { ctxt, cancel := context.WithTimeout(context.Background(), r.rpcTimeout) defer cancel() @@ -526,6 +526,7 @@ func (r *RPCKeyRing) SignMessageSchnorr(keyLoc keychain.KeyLocator, KeyIndex: int32(keyLoc.Index), }, DoubleHash: doubleHash, + NoHash: noHash, SchnorrSig: true, SchnorrSigTapTweak: taprootTweak, })