commit 56660433baf653063afc001183bd7b07dbb18830
Author: Andrea Franz <andrea@gravityblast.com>
Date:   Fri Mar 1 18:44:07 2019 +0100

    rename to keycard-go

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..1ef91b5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,80 @@
+# status-hardware-wallet
+
+`status-hardware-wallet` is a command line tool you can use to initialize a smartcard with the [Status Hardware Wallet](https://github.com/status-im/hardware-wallet).
+
+## Dependencies
+
+To install `hardware-wallet-go` you need `go` in your system.
+
+MacOSX:
+
+`brew install go`
+
+## Installation
+
+`go get github.com/status-im/hardware-wallet-go/cmd/status-hardware-wallet`
+
+The executable will be installed in `$GOPATH/bin`.
+Check your `$GOPATH` with `go env`.
+
+## Usage
+
+### Install the hardware wallet applet
+
+The install command will install an applet to the card.
+You can download the status `cap` file from the [status-im/hardware-wallet releases page](https://github.com/status-im/hardware-wallet/releases).
+
+```bash
+status-hardware-wallet install -l debug -a PATH_TO_CAP_FILE
+```
+
+In case the applet is already installed and you want to force a new installation you can pass the `-f` flag.
+
+### Card info
+
+```bash
+status-hardware-wallet info -l debug
+```
+
+The `info` command will print something like this:
+
+```
+Installed: true
+Initialized: false
+InstanceUID: 0x
+PublicKey: 0x112233...
+Version: 0x
+AvailableSlots: 0x
+KeyUID: 0x
+```
+
+### Card initialization
+
+
+```bash
+status-hardware-wallet init -l debug
+```
+
+The `init` command initializes the card and generates the secrets needed to pair the card to a device.
+
+```
+PIN 123456
+PUK 123456789012
+Pairing password: RandomPairingPassword
+```
+
+### Deleting the applet from the card
+
+:warning: **WARNING! This command will remove the applet and all the keys from the card.** :warning:
+
+```bash
+status-hardware-wallet delete -l debug
+```
+
+### Pairing
+
+```bash
+status-hardware-wallet pair -l debug
+```
+
+The process will ask for `PairingPassword` and `PIN` and will generate a pairing key you can use to interact with the card.
diff --git a/initializer.go b/initializer.go
new file mode 100644
index 0000000..9ec08b0
--- /dev/null
+++ b/initializer.go
@@ -0,0 +1,271 @@
+package main
+
+import (
+	"crypto/rand"
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/status-im/keycard-go/apdu"
+	"github.com/status-im/keycard-go/globalplatform"
+	"github.com/status-im/keycard-go/lightwallet"
+	"github.com/status-im/keycard-go/lightwallet/actions"
+)
+
+var (
+	errAppletNotInstalled     = errors.New("applet not installed")
+	errCardNotInitialized     = errors.New("card not initialized")
+	errCardAlreadyInitialized = errors.New("card already initialized")
+
+	ErrNotInitialized = errors.New("card not initialized")
+)
+
+// Initializer defines a struct with methods to install applets and initialize a card.
+type Initializer struct {
+	c globalplatform.Channel
+}
+
+// NewInitializer returns a new Initializer that communicates to Transmitter t.
+func NewInitializer(t globalplatform.Transmitter) *Initializer {
+	return &Initializer{
+		c: globalplatform.NewNormalChannel(t),
+	}
+}
+
+// Install installs the applet from the specified capFile.
+func (i *Initializer) Install(capFile *os.File, overwriteApplet bool) error {
+	info, err := actions.Select(i.c, lightwallet.WalletAID)
+	if err != nil {
+		return err
+	}
+
+	if info.Installed && !overwriteApplet {
+		return errors.New("applet already installed")
+	}
+
+	err = i.initGPSecureChannel(lightwallet.CardManagerAID)
+	if err != nil {
+		return err
+	}
+
+	err = i.deleteAID(lightwallet.NdefInstanceAID, lightwallet.WalletInstanceAID, lightwallet.AppletPkgAID)
+	if err != nil {
+		return err
+	}
+
+	err = i.installApplets(capFile)
+	if err != nil {
+		return err
+	}
+
+	return err
+}
+
+func (i *Initializer) Init() (*lightwallet.Secrets, error) {
+	secrets, err := lightwallet.NewSecrets()
+	if err != nil {
+		return nil, err
+	}
+
+	info, err := actions.Select(i.c, lightwallet.WalletAID)
+	if err != nil {
+		return nil, err
+	}
+
+	if !info.Installed {
+		return nil, errAppletNotInstalled
+	}
+
+	if info.Initialized {
+		return nil, errCardAlreadyInitialized
+	}
+
+	err = actions.Init(i.c, info.PublicKey, secrets, lightwallet.WalletAID)
+	if err != nil {
+		return nil, err
+	}
+
+	return secrets, nil
+}
+
+func (i *Initializer) Pair(pairingPass, pin string) (*lightwallet.PairingInfo, error) {
+	appInfo, err := actions.Select(i.c, lightwallet.WalletAID)
+	if err != nil {
+		return nil, err
+	}
+
+	if !appInfo.Initialized {
+		return nil, ErrNotInitialized
+	}
+
+	return actions.Pair(i.c, pairingPass, pin)
+}
+
+// Info returns a lightwallet.ApplicationInfo struct with info about the card.
+func (i *Initializer) Info() (*lightwallet.ApplicationInfo, error) {
+	return actions.Select(i.c, lightwallet.WalletAID)
+}
+
+// Status returns
+func (i *Initializer) Status(index uint8, key []byte) (*lightwallet.ApplicationStatus, error) {
+	info, err := actions.Select(i.c, lightwallet.WalletAID)
+	if err != nil {
+		return nil, err
+	}
+
+	if !info.Installed {
+		return nil, errAppletNotInstalled
+	}
+
+	if !info.Initialized {
+		return nil, errCardNotInitialized
+	}
+
+	sc, err := actions.OpenSecureChannel(i.c, info, index, key)
+	if err != nil {
+		return nil, err
+	}
+
+	return actions.GetStatusApplication(sc)
+}
+
+// Delete deletes the applet and related package from the card.
+func (i *Initializer) Delete() error {
+	err := i.initGPSecureChannel(lightwallet.CardManagerAID)
+	if err != nil {
+		return err
+	}
+
+	return i.deleteAID(lightwallet.NdefInstanceAID, lightwallet.WalletInstanceAID, lightwallet.AppletPkgAID)
+}
+
+func (i *Initializer) initGPSecureChannel(sdaid []byte) error {
+	// select card manager
+	err := i.selectAID(sdaid)
+	if err != nil {
+		return err
+	}
+
+	// initialize update
+	session, err := i.initializeUpdate()
+	if err != nil {
+		return err
+	}
+
+	i.c = globalplatform.NewSecureChannel(session, i.c)
+
+	// external authenticate
+	return i.externalAuthenticate(session)
+}
+
+func (i *Initializer) selectAID(aid []byte) error {
+	sel := globalplatform.NewCommandSelect(lightwallet.CardManagerAID)
+	_, err := i.send("select", sel)
+
+	return err
+}
+
+func (i *Initializer) initializeUpdate() (*globalplatform.Session, error) {
+	hostChallenge, err := generateHostChallenge()
+	if err != nil {
+		return nil, err
+	}
+
+	init := globalplatform.NewCommandInitializeUpdate(hostChallenge)
+	resp, err := i.send("initialize update", init)
+	if err != nil {
+		return nil, err
+	}
+
+	// verify cryptogram and initialize session keys
+	keys := globalplatform.NewKeyProvider(lightwallet.CardTestKey, lightwallet.CardTestKey)
+	session, err := globalplatform.NewSession(keys, resp, hostChallenge)
+
+	return session, err
+}
+
+func (i *Initializer) externalAuthenticate(session *globalplatform.Session) error {
+	encKey := session.KeyProvider().Enc()
+	extAuth, err := globalplatform.NewCommandExternalAuthenticate(encKey, session.CardChallenge(), session.HostChallenge())
+	if err != nil {
+		return err
+	}
+
+	_, err = i.send("external authenticate", extAuth)
+
+	return err
+}
+
+func (i *Initializer) deleteAID(aids ...[]byte) error {
+	for _, aid := range aids {
+		del := globalplatform.NewCommandDelete(aid)
+		_, err := i.send("delete", del, globalplatform.SwOK, globalplatform.SwReferencedDataNotFound)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (i *Initializer) installApplets(capFile *os.File) error {
+	// install for load
+	preLoad := globalplatform.NewCommandInstallForLoad(lightwallet.AppletPkgAID, lightwallet.CardManagerAID)
+	_, err := i.send("install for load", preLoad)
+	if err != nil {
+		return err
+	}
+
+	// load
+	load, err := globalplatform.NewLoadCommandStream(capFile)
+	if err != nil {
+		return err
+	}
+
+	for load.Next() {
+		cmd := load.GetCommand()
+		_, err = i.send(fmt.Sprintf("load %d of 40", load.Index()+1), cmd)
+		if err != nil {
+			return err
+		}
+	}
+
+	installNdef := globalplatform.NewCommandInstallForInstall(lightwallet.AppletPkgAID, lightwallet.NdefAppletAID, lightwallet.NdefInstanceAID, []byte{})
+	_, err = i.send("install for install (ndef)", installNdef)
+	if err != nil {
+		return err
+	}
+
+	installWallet := globalplatform.NewCommandInstallForInstall(lightwallet.AppletPkgAID, lightwallet.WalletAID, lightwallet.WalletInstanceAID, []byte{})
+	_, err = i.send("install for install (wallet)", installWallet)
+
+	return err
+}
+
+func (i *Initializer) send(description string, cmd *apdu.Command, allowedResponses ...uint16) (*apdu.Response, error) {
+	logger.Debug("sending apdu command", "name", description)
+	resp, err := i.c.Send(cmd)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(allowedResponses) == 0 {
+		allowedResponses = []uint16{apdu.SwOK}
+	}
+
+	for _, code := range allowedResponses {
+		if code == resp.Sw {
+			return resp, nil
+		}
+	}
+
+	err = fmt.Errorf("unexpected response from command %s: %x", description, resp.Sw)
+
+	return nil, err
+}
+
+func generateHostChallenge() ([]byte, error) {
+	c := make([]byte, 8)
+	_, err := rand.Read(c)
+	return c, err
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..14e3f34
--- /dev/null
+++ b/main.go
@@ -0,0 +1,274 @@
+package main
+
+import (
+	"bufio"
+	"encoding/hex"
+	"flag"
+	"fmt"
+	stdlog "log"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/ebfe/scard"
+	"github.com/ethereum/go-ethereum/log"
+)
+
+type commandFunc func(*Initializer) error
+
+var (
+	logger = log.New("package", "status-go/cmd/keycard")
+
+	commands map[string]commandFunc
+	command  string
+
+	flagCapFile   = flag.String("a", "", "applet cap file path")
+	flagOverwrite = flag.Bool("f", false, "force applet installation if already installed")
+	flagLogLevel  = flag.String("l", "", `Log level, one of: "error", "warn", "info", "debug", and "trace"`)
+)
+
+func initLogger() {
+	if *flagLogLevel == "" {
+		*flagLogLevel = "info"
+	}
+
+	level, err := log.LvlFromString(strings.ToLower(*flagLogLevel))
+	if err != nil {
+		stdlog.Fatal(err)
+	}
+
+	handler := log.StreamHandler(os.Stderr, log.TerminalFormat(true))
+	filteredHandler := log.LvlFilterHandler(level, handler)
+	log.Root().SetHandler(filteredHandler)
+}
+
+func init() {
+	commands = map[string]commandFunc{
+		"install": commandInstall,
+		"info":    commandInfo,
+		"delete":  commandDelete,
+		"init":    commandInit,
+		"pair":    commandPair,
+		"status":  commandStatus,
+	}
+
+	if len(os.Args) < 2 {
+		usage()
+	}
+
+	command = os.Args[1]
+	if len(os.Args) > 2 {
+		flag.CommandLine.Parse(os.Args[2:])
+	}
+
+	initLogger()
+}
+
+func usage() {
+	fmt.Printf("\nUsage:\n  keycard COMMAND [FLAGS]\n\nAvailable commands:\n")
+	for name := range commands {
+		fmt.Printf("  %s\n", name)
+	}
+	fmt.Print("\nFlags:\n\n")
+	flag.PrintDefaults()
+	os.Exit(1)
+}
+
+func fail(msg string, ctx ...interface{}) {
+	logger.Error(msg, ctx...)
+	os.Exit(1)
+}
+
+func main() {
+	ctx, err := scard.EstablishContext()
+	if err != nil {
+		fail("error establishing card context", "error", err)
+	}
+	defer func() {
+		if err := ctx.Release(); err != nil {
+			logger.Error("error releasing context", "error", err)
+		}
+	}()
+
+	readers, err := ctx.ListReaders()
+	if err != nil {
+		fail("error getting readers", "error", err)
+	}
+
+	if len(readers) == 0 {
+		fail("couldn't find any reader")
+	}
+
+	if len(readers) > 1 {
+		fail("too many readers found")
+	}
+
+	reader := readers[0]
+	logger.Debug("using reader", "name", reader)
+	logger.Debug("connecting to card", "reader", reader)
+	card, err := ctx.Connect(reader, scard.ShareShared, scard.ProtocolAny)
+	if err != nil {
+		fail("error connecting to card", "error", err)
+	}
+	defer func() {
+		if err := card.Disconnect(scard.ResetCard); err != nil {
+			logger.Error("error disconnecting card", "error", err)
+		}
+	}()
+
+	status, err := card.Status()
+	if err != nil {
+		fail("error getting card status", "error", err)
+	}
+
+	switch status.ActiveProtocol {
+	case scard.ProtocolT0:
+		logger.Debug("card protocol", "T", "0")
+	case scard.ProtocolT1:
+		logger.Debug("card protocol", "T", "1")
+	default:
+		logger.Debug("card protocol", "T", "unknown")
+	}
+
+	i := NewInitializer(card)
+	if f, ok := commands[command]; ok {
+		err = f(i)
+		if err != nil {
+			logger.Error("error executing command", "command", command, "error", err)
+			os.Exit(1)
+		}
+		os.Exit(0)
+	}
+
+	fail("unknown command", "command", command)
+	usage()
+}
+
+func ask(description string) string {
+	r := bufio.NewReader(os.Stdin)
+	fmt.Printf("%s: ", description)
+	text, err := r.ReadString('\n')
+	if err != nil {
+		stdlog.Fatal(err)
+	}
+
+	return strings.TrimSpace(text)
+}
+
+func askHex(description string) []byte {
+	s := ask(description)
+	if s[:2] == "0x" {
+		s = s[2:]
+	}
+
+	data, err := hex.DecodeString(s)
+	if err != nil {
+		stdlog.Fatal(err)
+	}
+
+	return data
+}
+
+func askUint8(description string) uint8 {
+	s := ask(description)
+	i, err := strconv.ParseUint(s, 10, 8)
+	if err != nil {
+		stdlog.Fatal(err)
+	}
+
+	return uint8(i)
+}
+
+func commandInstall(i *Initializer) error {
+	if *flagCapFile == "" {
+		logger.Error("you must specify a cap file path with the -f flag\n")
+		usage()
+	}
+
+	f, err := os.Open(*flagCapFile)
+	if err != nil {
+		fail("error opening cap file", "error", err)
+	}
+	defer f.Close()
+
+	fmt.Printf("installation can take a while...\n")
+	err = i.Install(f, *flagOverwrite)
+	if err != nil {
+		fail("installation error", "error", err)
+	}
+
+	fmt.Printf("applet installed successfully.\n")
+	return nil
+}
+
+func commandInfo(i *Initializer) error {
+	info, err := i.Info()
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("Installed: %+v\n", info.Installed)
+	fmt.Printf("Initialized: %+v\n", info.Initialized)
+	fmt.Printf("InstanceUID: 0x%x\n", info.InstanceUID)
+	fmt.Printf("PublicKey: 0x%x\n", info.PublicKey)
+	fmt.Printf("Version: 0x%x\n", info.Version)
+	fmt.Printf("AvailableSlots: 0x%x\n", info.AvailableSlots)
+	fmt.Printf("KeyUID: 0x%x\n", info.KeyUID)
+
+	return nil
+}
+
+func commandDelete(i *Initializer) error {
+	err := i.Delete()
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("applet deleted\n")
+
+	return nil
+}
+
+func commandInit(i *Initializer) error {
+	secrets, err := i.Init()
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("PIN %s\n", secrets.Pin())
+	fmt.Printf("PUK %s\n", secrets.Puk())
+	fmt.Printf("Pairing password: %s\n", secrets.PairingPass())
+
+	return nil
+}
+
+func commandPair(i *Initializer) error {
+	pairingPass := ask("Pairing password")
+	pin := ask("PIN")
+	info, err := i.Pair(pairingPass, pin)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("Pairing key 0x%x\n", info.Key)
+	fmt.Printf("Pairing Index %d\n", info.Index)
+
+	return nil
+}
+
+func commandStatus(i *Initializer) error {
+	index := askUint8("Pairing index")
+	key := askHex("Pairing key")
+
+	appStatus, err := i.Status(index, key)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("Pin retry count: %d\n", appStatus.PinRetryCount)
+	fmt.Printf("PUK retry count: %d\n", appStatus.PUKRetryCount)
+	fmt.Printf("Key initialized: %v\n", appStatus.KeyInitialized)
+	fmt.Printf("Public key derivation: %v\n", appStatus.PubKeyDerivation)
+
+	return nil
+}