accounts/scwallet: add a switch to specify path to sc daemon (#19439)

cmd/XDC/main.go

@@ -63,6 +63,7 @@ var (
 		utils.DataDirFlag,
 		utils.KeyStoreDirFlag,
 		//utils.NoUSBFlag,
+		utils.SmartCardDaemonPathFlag,
 		//utils.EthashCacheDirFlag,
 		//utils.EthashCachesInMemoryFlag,
 		//utils.EthashCachesOnDiskFlag,

cmd/utils/flags.go

@@ -63,6 +63,7 @@ import (
 	"github.com/XinFinOrg/XDPoSChain/p2p/netutil"
 	"github.com/XinFinOrg/XDPoSChain/params"
 	"github.com/XinFinOrg/XDPoSChain/rpc"
+	pcsclite "github.com/gballet/go-libpcsclite"
 	gopsutil "github.com/shirou/gopsutil/mem"
 	"github.com/urfave/cli/v2"
 )
@@ -87,6 +88,12 @@ var (
 		Usage:    "Directory for the keystore (default = inside the datadir)",
 		Category: flags.AccountCategory,
 	}
+	SmartCardDaemonPathFlag = &cli.StringFlag{
+		Name:     "pcscdpath",
+		Usage:    "Path to the smartcard daemon (pcscd) socket file",
+		Value:    pcsclite.PCSCDSockName,
+		Category: flags.AccountCategory,
+	}
 	NetworkIdFlag = &cli.Uint64Flag{
 		Name:     "networkid",
 		Usage:    "Network identifier (integer, 89=XDPoSChain)",
@@ -1194,6 +1201,7 @@ func SetNodeConfig(ctx *cli.Context, cfg *node.Config) {
 	setWS(ctx, cfg)
 	setNodeUserIdent(ctx, cfg)
 	setPrefix(ctx, cfg)
+	setSmartCard(ctx, cfg)
 
 	switch {
 	case ctx.IsSet(DataDirFlag.Name):
@@ -1227,6 +1235,26 @@ func SetNodeConfig(ctx *cli.Context, cfg *node.Config) {
 	}
 }
 
+func setSmartCard(ctx *cli.Context, cfg *node.Config) {
+	// Skip enabling smartcards if no path is set
+	path := ctx.String(SmartCardDaemonPathFlag.Name)
+	if path == "" {
+		return
+	}
+	// Sanity check that the smartcard path is valid
+	fi, err := os.Stat(path)
+	if err != nil {
+		log.Info("Smartcard socket not found, disabling", "err", err)
+		return
+	}
+	if fi.Mode()&os.ModeType != os.ModeSocket {
+		log.Error("Invalid smartcard daemon path", "path", path, "type", fi.Mode().String())
+		return
+	}
+	// Smartcard daemon path exists and is a socket, enable it
+	cfg.SmartCardDaemonPath = path
+}
+
 func setGPO(ctx *cli.Context, cfg *gasprice.Config, light bool) {
 	// If we are running the light client, apply another group
 	// settings for gas oracle.

node/config.go

@@ -26,6 +26,7 @@ import (
 
 	"github.com/XinFinOrg/XDPoSChain/accounts"
 	"github.com/XinFinOrg/XDPoSChain/accounts/keystore"
+	"github.com/XinFinOrg/XDPoSChain/accounts/scwallet"
 	"github.com/XinFinOrg/XDPoSChain/accounts/usbwallet"
 	"github.com/XinFinOrg/XDPoSChain/common"
 	"github.com/XinFinOrg/XDPoSChain/crypto"
@@ -88,6 +89,9 @@ type Config struct {
 	// NoUSB disables hardware wallet monitoring and connectivity.
 	NoUSB bool `toml:",omitempty"`
 
+	// SmartCardDaemonPath is the path to the smartcard daemon's socket.
+	SmartCardDaemonPath string `toml:",omitempty"`
+
 	// IPCPath is the requested location to place the IPC endpoint. If the path is
 	// a simple file name, it is placed inside the data directory (or on the root
 	// pipe path on Windows), whereas if it's a resolvable path name (absolute or
@@ -425,22 +429,36 @@ func makeAccountManager(conf *Config) (*accounts.Manager, string, error) {
 		return nil, "", err
 	}
 	// Assemble the account manager and supported backends
-	backends := []accounts.Backend{
-		keystore.NewKeyStore(keydir, scryptN, scryptP),
-	}
-	if !conf.NoUSB {
-		// Start a USB hub for Ledger hardware wallets
-		if ledgerhub, err := usbwallet.NewLedgerHub(); err != nil {
-			log.Warn(fmt.Sprintf("Failed to start Ledger hub, disabling: %v", err))
-		} else {
-			backends = append(backends, ledgerhub)
+	var backends []accounts.Backend
+	if len(backends) == 0 {
+		// For now, we're using EITHER external signer OR local signers.
+		// If/when we implement some form of lockfile for USB and keystore wallets,
+		// we can have both, but it's very confusing for the user to see the same
+		// accounts in both externally and locally, plus very racey.
+		backends = append(backends, keystore.NewKeyStore(keydir, scryptN, scryptP))
+		if !conf.NoUSB {
+			// Start a USB hub for Ledger hardware wallets
+			if ledgerhub, err := usbwallet.NewLedgerHub(); err != nil {
+				log.Warn(fmt.Sprintf("Failed to start Ledger hub, disabling: %v", err))
+			} else {
+				backends = append(backends, ledgerhub)
+			}
+			// Start a USB hub for Trezor hardware wallets
+			if trezorhub, err := usbwallet.NewTrezorHub(); err != nil {
+				log.Warn(fmt.Sprintf("Failed to start Trezor hub, disabling: %v", err))
+			} else {
+				backends = append(backends, trezorhub)
+			}
 		}
-		// Start a USB hub for Trezor hardware wallets
-		if trezorhub, err := usbwallet.NewTrezorHub(); err != nil {
-			log.Warn(fmt.Sprintf("Failed to start Trezor hub, disabling: %v", err))
-		} else {
-			backends = append(backends, trezorhub)
+		if len(conf.SmartCardDaemonPath) > 0 {
+			// Start a smart card hub
+			if schub, err := scwallet.NewHub(conf.SmartCardDaemonPath, scwallet.Scheme, keydir); err != nil {
+				log.Warn(fmt.Sprintf("Failed to start smart card hub, disabling: %v", err))
+			} else {
+				backends = append(backends, schub)
+			}
 		}
 	}
+
 	return accounts.NewManager(&accounts.Config{InsecureUnlockAllowed: conf.InsecureUnlockAllowed}, backends...), ephemeral, nil
 }