cgo: Add verify message.

.github/workflows/build.yml

@@ -2,55 +2,32 @@ name: Build and Test
 on: [push, pull_request]
 permissions:
   contents: read
+
 jobs:
-  build-go:
+  build:
     name: Go CI
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: ['1.20', '1.21']
+        go: ["1.22", "1.23"]
     steps:
-      - uses: awalsh128/cache-apt-pkgs-action@1850ee53f6e706525805321a3f2f863dcf73c962 #v1.3.0
-        with:
-          packages: git-restore-mtime libgtk-3-dev libwebkit2gtk-4.0-dev
-          version: 1.0
-
+      - name: Check out source
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
       - name: Set up Go
-        uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe #v4.1.0
+        uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
         with:
           go-version: ${{ matrix.go }}
-
-      - name: Check out source
-        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac #v4.0.0
-        with:
-          fetch-depth: 0
-      # Restore original file modification times for test cache reasons
-      - name: restore timestamps
-        run: git restore-mtime
-      - name: Install Linters
-        run: "curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.54.2"
-      - name: Use test and module cache
-        uses: actions/cache@704facf57e6136b1bc63b828d79edcd491f0ee84 #v3.3.2
+      - name: Use lint cache
+        uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
         with:
           path: |
-            ~/.cache/go-build
-            ~/go/pkg/mod
-          key: go-test-${{ matrix.go }}-${{ github.sha }}
-          restore-keys: go-test-${{ matrix.go }}
-
+            ~/.cache/golangci-lint
+          key: go-lint-${{ matrix.go }}-${{ hashFiles('./go.sum') }}
+          restore-keys: go-lint-${{ matrix.go }}
+      - name: Install Linters
+        run: "go install github.com/golangci/golangci-lint/cmd/[email protected]"
+      - name: Build
+        run: go build ./...
       - name: Test
-        env:
-          GO111MODULE: "on"
         run: |
-          ./run_tests.sh
-
-  lint-docs:
-    name: Lint Markdown
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac #v4.0.0
-    - uses: DavidAnson/markdownlint-cli2-action@3aaa38e446fbd2c288af4291aa0f55d64651050f #v12.0.0
-      continue-on-error: true
-      with:
-        globs: |
-          *.md
+          sh ./run_tests.sh

.golangci.yml

@@ -2,15 +2,15 @@ run:
   deadline: 10m
 
 output:
-  format: github-actions,colored-line-number
+  formats: colored-line-number
 
 linters:
   disable-all: true
   enable:
     - asciicheck
     - bidichk
     - durationcheck
-    - exportloopref
+    - copyloopvar
     - gofmt
     - goimports
     - gosimple

asset/dcr/loader.go

@@ -2,6 +2,7 @@ package dcr
 
 import (
 	"context"
+	"encoding/binary"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -10,6 +11,7 @@ import (
 	"decred.org/dcrwallet/v4/wallet"
 	_ "decred.org/dcrwallet/v4/wallet/drivers/bdb"
 	"decred.org/dcrwallet/v4/wallet/udb"
+	"github.com/decred/dcrd/crypto/blake256"
 	"github.com/decred/dcrd/hdkeychain/v3"
 	"github.com/decred/libwallet/asset"
 )
@@ -89,8 +91,14 @@ func CreateWallet(ctx context.Context, params asset.CreateWalletParams, recovery
 		}
 	}()
 
+	// Adjust seed to create the same wallet as dex.
+	b := make([]byte, len(seed)+4)
+	copy(b, seed)
+	binary.BigEndian.PutUint32(b[len(seed):], 42)
+	s := blake256.Sum256(b)
+
 	// Initialize the newly created database for the wallet before opening.
-	err = wallet.Create(ctx, db, nil, params.Pass, seed, chainParams)
+	err = wallet.Create(ctx, db, nil, params.Pass, s[:], chainParams)
 	if err != nil {
 		return nil, fmt.Errorf("wallet.Create error: %w", err)
 	}

cgo/addresses.go

@@ -5,6 +5,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 
+	dcrwallet "decred.org/dcrwallet/v4/wallet"
 	"decred.org/dcrwallet/v4/wallet/udb"
 	"github.com/decred/dcrd/txscript/v4/stdaddr"
 )
@@ -27,7 +28,7 @@ func currentReceiveAddress(cName *C.char) *C.char {
 		return errCResponse("w.CurrentAddress error: %v", err)
 	}
 
-	return successCResponse(addr.String())
+	return successCResponse("%s", addr)
 }
 
 //export newExternalAddress
@@ -55,7 +56,7 @@ func newExternalAddress(cName *C.char) *C.char {
 		return errCResponse("w.CurrentAddress error: %v", err)
 	}
 
-	return successCResponse(addr.String())
+	return successCResponse("%s", addr)
 }
 
 //export signMessage
@@ -70,6 +71,16 @@ func signMessage(cName, cMessage, cAddress, cPassword *C.char) *C.char {
 		return errCResponse("unable to decode address: %v", err)
 	}
 
+	// Addresses must have an associated secp256k1 private key and therefore
+	// must be P2PK or P2PKH (P2SH is not allowed).
+	switch addr.(type) {
+	case *stdaddr.AddressPubKeyEcdsaSecp256k1V0:
+	case *stdaddr.AddressPubKeyHashEcdsaSecp256k1V0:
+		// Valid address types, proceed to sign.
+	default:
+		return errCResponse("invalid address type: must be P2PK or P2PKH")
+	}
+
 	if err := w.MainWallet().Unlock(w.ctx, []byte(goString(cPassword)), nil); err != nil {
 		return errCResponse("cannot unlock wallet: %v", err)
 	}
@@ -81,7 +92,42 @@ func signMessage(cName, cMessage, cAddress, cPassword *C.char) *C.char {
 
 	sEnc := base64.StdEncoding.EncodeToString(sig)
 
-	return successCResponse(sEnc)
+	return successCResponse("%s", sEnc)
+}
+
+//export verifyMessage
+func verifyMessage(cName, cMessage, cAddress, cSig *C.char) *C.char {
+	w, ok := loadedWallet(cName)
+	if !ok {
+		return errCResponse("wallet with name %q is not loaded", goString(cName))
+	}
+
+	addr, err := stdaddr.DecodeAddress(goString(cAddress), w.MainWallet().ChainParams())
+	if err != nil {
+		return errCResponse("unable to decode address: %v", err)
+	}
+
+	// Addresses must have an associated secp256k1 private key and therefore
+	// must be P2PK or P2PKH (P2SH is not allowed).
+	switch addr.(type) {
+	case *stdaddr.AddressPubKeyEcdsaSecp256k1V0:
+	case *stdaddr.AddressPubKeyHashEcdsaSecp256k1V0:
+		// Valid address types, proceed with verification.
+	default:
+		return errCResponse("invalid address type: must be P2PK or P2PKH")
+	}
+
+	sig, err := base64.StdEncoding.DecodeString(goString(cSig))
+	if err != nil {
+		return errCResponse("unable to decode signature: %v", err)
+	}
+
+	ok, err = dcrwallet.VerifyMessage(goString(cMessage), addr, sig, w.MainWallet().ChainParams())
+	if err != nil {
+		return errCResponse("unable to verify message: %v", err)
+	}
+
+	return successCResponse("%v", ok)
 }
 
 //export addresses
@@ -111,7 +157,7 @@ func addresses(cName *C.char) *C.char {
 		return errCResponse("unable to marshal addresses: %v", err)
 	}
 
-	return successCResponse(string(b))
+	return successCResponse("%s", b)
 }
 
 //export defaultPubkey
@@ -126,5 +172,5 @@ func defaultPubkey(cName *C.char) *C.char {
 		return errCResponse("unable to get default pubkey: %v", err)
 	}
 
-	return successCResponse(pubkey)
+	return successCResponse("%s", pubkey)
 }

cgo/sync.go

@@ -122,7 +122,7 @@ func syncWallet(cName, cPeers *C.char) *C.char {
 		},
 	}
 	if err := w.StartSync(w.ctx, ntfns, peers...); err != nil {
-		return errCResponse(err.Error())
+		return errCResponse("%v", err)
 	}
 	return successCResponse("sync started")
 }
@@ -168,7 +168,7 @@ func syncWalletStatus(cName *C.char) *C.char {
 	if err != nil {
 		return errCResponse("unable to marshal sync status result: %v", err)
 	}
-	return successCResponse(string(b))
+	return successCResponse("%s", b)
 }
 
 //export rescanFromHeight
@@ -255,5 +255,5 @@ func birthState(cName *C.char) *C.char {
 	if err != nil {
 		return errCResponse("unable to marshal birth state result: %v", err)
 	}
-	return successCResponse(string(b))
+	return successCResponse("%s", b)
 }

cgo/transactions.go

@@ -4,7 +4,6 @@ import "C"
 import (
 	"encoding/hex"
 	"encoding/json"
-	"fmt"
 	"math"
 	"strconv"
 
@@ -73,7 +72,7 @@ func createSignedTransaction(cName, cCreateSignedTxJSONReq *C.char) *C.char {
 	if err != nil {
 		return errCResponse("unable to marshal sign send transaction result: %v", err)
 	}
-	return successCResponse(string(b))
+	return successCResponse("%s", b)
 }
 
 //export sendRawTransaction
@@ -86,7 +85,7 @@ func sendRawTransaction(cName, cTxHex *C.char) *C.char {
 	if err != nil {
 		return errCResponse("unable to sign send transaction: %v", err)
 	}
-	return successCResponse(txHash.String())
+	return successCResponse("%s", txHash)
 }
 
 //export listUnspents
@@ -126,7 +125,7 @@ func listUnspents(cName *C.char) *C.char {
 	if err != nil {
 		return errCResponse("unable to marshal list unspents result: %v", err)
 	}
-	return successCResponse(string(b))
+	return successCResponse("%s", b)
 }
 
 //export estimateFee
@@ -143,7 +142,7 @@ func estimateFee(cName, cNBlocks *C.char) *C.char {
 	if err != nil {
 		return errCResponse("unable to get fee from oracle: %v", err)
 	}
-	return successCResponse(fmt.Sprintf("%d", (uint64(txFee * 1e8))))
+	return successCResponse("%d", uint64(txFee*1e8))
 }
 
 //export listTransactions
@@ -182,7 +181,7 @@ func listTransactions(cName, cFrom, cCount *C.char) *C.char {
 	if err != nil {
 		return errCResponse("unable to marshal list transactions result: %v", err)
 	}
-	return successCResponse(string(b))
+	return successCResponse("%s", b)
 }
 
 //export bestBlock
@@ -200,5 +199,5 @@ func bestBlock(cName *C.char) *C.char {
 	if err != nil {
 		return errCResponse("unable to marshal best block result: %v", err)
 	}
-	return successCResponse(string(b))
+	return successCResponse("%s", b)
 }