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itest: test SignMessage/VerifyMessage tag option

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Orbital 2023-10-24 17:54:25 -05:00
parent ed373baed0
commit aa6f13e524
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1 changed files with 70 additions and 0 deletions
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70
itest/lnd_signer_test.go
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@ -2,11 +2,13 @@ package itest
import (
"bytes"
"context"
"crypto/sha256"
"github.com/btcsuite/btcd/btcec/v2"
"github.com/btcsuite/btcd/btcec/v2/schnorr"
"github.com/btcsuite/btcd/btcutil"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcd/txscript"
"github.com/btcsuite/btcd/wire"
"github.com/lightningnetwork/lnd/keychain"
@ -458,4 +460,72 @@ func runSignVerifyMessage(ht *lntest.HarnessTest, alice *node.HarnessNode) {
}
verifyResp = alice.RPC.VerifyMessageSigner(verifyReq)
require.True(ht, verifyResp.Valid, "failed to verify message")
// Now let's try signing and verifying a tagged hash.
tag := []byte("lightninginvoice_requestsignature")
signMsgReq = &signrpc.SignMessageReq{
Msg: aliceMsg,
KeyLoc: keyLoc,
SchnorrSig: true,
Tag: tag,
}
signMsgResp = alice.RPC.SignMessageSigner(signMsgReq)
customPubKey = deriveCustomizedKey()
verifyReq = &signrpc.VerifyMessageReq{
Msg: aliceMsg,
Signature: signMsgResp.Signature,
Pubkey: schnorr.SerializePubKey(customPubKey),
IsSchnorrSig: true,
Tag: tag,
}
verifyResp = alice.RPC.VerifyMessageSigner(verifyReq)
require.True(ht, verifyResp.Valid, "failed to verify message")
// Verify that both SignMessage and VerifyMessage error if a tag is
// provided but the Schnorr option is not set.
signMsgReq = &signrpc.SignMessageReq{
Msg: aliceMsg,
KeyLoc: keyLoc,
Tag: tag,
}
expectedErr := "tag can only be used when the Schnorr signature " +
"option is set"
ctxt := context.Background()
_, err := alice.RPC.Signer.SignMessage(ctxt, signMsgReq)
require.ErrorContains(ht, err, expectedErr)
verifyReq = &signrpc.VerifyMessageReq{
Msg: aliceMsg,
Signature: signMsgResp.Signature,
Pubkey: schnorr.SerializePubKey(customPubKey),
Tag: tag,
}
_, err = alice.RPC.Signer.VerifyMessage(ctxt, verifyReq)
require.ErrorContains(ht, err, expectedErr)
// Make sure that SignMessage throws an error if a BIP0340 or
// TapSighash tag is provided.
signMsgReq = &signrpc.SignMessageReq{
Msg: aliceMsg,
KeyLoc: keyLoc,
SchnorrSig: true,
Tag: []byte("BIP0340/challenge"),
}
_, err = alice.RPC.Signer.SignMessage(ctxt, signMsgReq)
require.ErrorContains(ht, err, "tag cannot have BIP0340 prefix")
signMsgReq = &signrpc.SignMessageReq{
Msg: aliceMsg,
KeyLoc: keyLoc,
SchnorrSig: true,
Tag: chainhash.TagTapSighash,
}
_, err = alice.RPC.Signer.SignMessage(ctxt, signMsgReq)
require.ErrorContains(ht, err, "tag cannot be TapSighash")
}