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fprint_transaction.go
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fprint_transaction.go
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package main
import (
"errors"
"os/exec"
"path/filepath"
"strings"
"sync"
"time"
"unicode/utf8"
dbus "github.com/godbus/dbus"
"github.com/gosexy/gettext"
fprint "github.com/linuxdeepin/go-dbus-factory/com.deepin.daemon.fprintd"
"pkg.deepin.io/lib/dbusutil"
"pkg.deepin.io/lib/dbusutil/proxy"
"pkg.deepin.io/lib/strv"
)
var (
msgVerificationFailed = Tr("Fingerprint verification failed")
msgVerificationTimedOut = Tr("Fingerprint verification timed out")
)
func Tr(str string) string {
return str
}
type FPrintTransaction struct {
baseTransaction
PropsMu sync.RWMutex
Authenticating bool
Sender string
quit chan struct{}
release chan struct{}
devicePath dbus.ObjectPath
}
func (tx *FPrintTransaction) setPropAuthenticating(value bool) {
if tx.Authenticating != value {
tx.Authenticating = value
err := tx.parent.service.EmitPropertyChanged(tx, "Authenticating", value)
if err != nil {
logger.Warning(tx, err)
}
}
}
func (tx *FPrintTransaction) getUser() string {
user := tx.baseTransaction.getUser()
if user != "" {
return user
}
result, err := tx.requestEchoOn("login:")
if err != nil {
logger.Warning(tx, "requestEchoOn return err:", err)
return ""
} else {
logger.Debug(tx, "requestEchoOn(\"login:\") result:", result)
tx.setUser(result)
return result
}
}
func (tx *FPrintTransaction) getDevice() (*fprint.Device, error) {
devicePath, err := tx.parent.fprintManager.GetDefaultDevice(0)
if err != nil {
return nil, err
}
deviceObj, err := fprint.NewDevice(tx.parent.service.Conn(), devicePath)
if err != nil {
return nil, err
}
return deviceObj, nil
}
func (tx *FPrintTransaction) setDevicePath(devPath dbus.ObjectPath) {
tx.mu.Lock()
tx.devicePath = devPath
tx.mu.Unlock()
}
func (tx *FPrintTransaction) isClaimOk() bool {
tx.mu.Lock()
defer tx.mu.Unlock()
return tx.devicePath != ""
}
func (tx *FPrintTransaction) authenticate() error {
tx.PropsMu.Lock()
inAuth := tx.Authenticating
tx.PropsMu.Unlock()
if inAuth {
return errors.New("transaction busy")
}
user := tx.getUser()
if user == "" {
return errors.New("user empty")
}
deviceObj, err := tx.getDevice()
if err != nil {
return err
}
fingers, err := deviceObj.ListEnrolledFingers(0, user)
if err != nil {
return err
}
if len(fingers) == 0 {
return errors.New("user do not have fingerprint")
}
scanType, err := deviceObj.ScanType().Get(0)
if err != nil {
logger.Warning(err)
}
err = tx.claimDevice(deviceObj, user)
if err != nil {
return err
}
go func() {
var err error
tx.PropsMu.Lock()
tx.setPropAuthenticating(true)
tx.PropsMu.Unlock()
tx.quit = make(chan struct{})
tx.release = make(chan struct{})
verifyErr := tx.verify(deviceObj, user, scanType)
if verifyErr != nil {
logger.Warning(tx, verifyErr)
}
if tx.isClaimOk() {
logger.Debug(tx, "release device")
tx.setDevicePath("")
err = deviceObj.Release(0)
if err != nil {
logger.Warning(tx, err)
}
} else {
logger.Debug(tx, "claim lost, do not call Release")
}
close(tx.release)
tx.PropsMu.Lock()
tx.setPropAuthenticating(false)
tx.PropsMu.Unlock()
tx.sendResult(verifyErr == nil)
}()
return nil
}
func (tx *FPrintTransaction) Authenticate(sender dbus.Sender) *dbus.Error {
tx.parent.service.DelayAutoQuit()
if err := tx.checkSender(sender); err != nil {
return err
}
logger.Debugf("%s Authenticate sender: %q", tx, sender)
err := tx.authenticate()
if err != nil {
logger.Infof("%s failed to authenticate: %v", tx, err)
}
return dbusutil.ToError(err)
}
type verifyResult struct {
status string
done bool
}
func (tx *FPrintTransaction) releaseOtherTx(devPath dbus.ObjectPath) {
tx.parent.releaseFprintTransaction(tx.id, devPath)
}
func (tx *FPrintTransaction) claimDevice(deviceObj *fprint.Device, user string) error {
logger.Debug(tx, "claim device")
caps, err := deviceObj.GetCapabilities(0)
if err != nil {
logger.Warning(err)
}
if strv.Strv(caps).Contains("ClaimForce") {
tx.releaseOtherTx(deviceObj.Path_())
// huawei device
err = deviceObj.ClaimForce(0, user)
if err != nil {
return err
}
} else {
// fprintd device
err = deviceObj.Claim(0, user)
if err != nil {
if strings.Contains(err.Error(), "Could not attempt device open") {
killFPrintDaemon()
}
return err
}
}
tx.setDevicePath(deviceObj.Path_())
return nil
}
var errClaimLost = errors.New("claim lost")
func (tx *FPrintTransaction) verify(deviceObj *fprint.Device, user, scanType string) error {
if !tx.isClaimOk() {
return errClaimLost
}
logger.Debugf("%v verify device: %v, user: %s", tx, deviceObj.Path_(), user)
var isSwipe bool
if scanType == "swipe" {
isSwipe = true
}
locale := tx.getUserLocale()
deviceObj.InitSignalExt(tx.parent.sigLoop, true)
var msg string
if isSwipe {
msg = "Swipe your finger across the fingerprint reader"
} else {
msg = "Place your finger on the fingerprint reader"
}
msg = getFprintMsg(locale, msg)
err := tx.displayTextInfo(msg)
if err != nil {
logger.Warning(tx, err)
}
verifyResultCh := make(chan verifyResult)
_, err = deviceObj.ConnectVerifyStatus(func(result string, done bool) {
logger.Debug(tx, "signal VerifyStatus", result, done)
if tx.hasEnded() {
return
}
msg := verifyResultStrToMsg(result, isSwipe)
msg = getFprintMsg(locale, msg)
if msg != "" {
err := tx.displayErrorMsg(result, msg)
if err != nil {
logger.Warning(tx, err)
}
}
verifyResultCh <- verifyResult{result, done}
})
if err != nil {
logger.Warning(err)
}
var (
verifyOk bool
continue0 bool
maxTries = 5
)
for maxTries > 0 {
verifyOk, continue0 = tx.doVerify(deviceObj, verifyResultCh, locale)
logger.Debugf("%v doVerify verifyOk: %v, continue: %v", tx, verifyOk, continue0)
if !continue0 {
break
}
maxTries--
}
deviceObj.RemoveHandler(proxy.RemoveAllHandlers)
if verifyOk {
return nil
}
return errors.New("verify failed")
}
func shouldLimitVerifyTime(deviceObj *fprint.Device) bool {
path := string(deviceObj.Path_())
return filepath.Base(path) != "huawei"
}
func (tx *FPrintTransaction) doVerify(deviceObj *fprint.Device, verifyResultCh chan verifyResult,
locale string) (ok, continue0 bool) {
if !tx.isClaimOk() {
return
}
logger.Debug(tx, "VerifyStart")
err := deviceObj.VerifyStart(0, "any")
if err != nil {
logger.Warning(err)
return false, false
}
var timeCh <-chan time.Time
if shouldLimitVerifyTime(deviceObj) {
timeCh = time.After(10 * time.Second)
}
var status string
loop:
for {
select {
case <-timeCh:
logger.Warning(tx, "timed out")
msg := getFprintMsg(locale, msgVerificationTimedOut)
err := tx.displayErrorMsg("verify-timed-out", msg)
if err != nil {
logger.Warning(err)
}
break loop
case <-tx.quit:
logger.Debug(tx, "receive quit")
break loop
case result, ok := <-verifyResultCh:
if ok {
logger.Debug(tx, "receive result", result)
if result.done {
status = result.status
break loop
}
} else {
logger.Debug("verifyResultCh closed")
break loop
}
}
}
if tx.isClaimOk() {
logger.Debug(tx, "VerifyStop")
stopCallCh := make(chan *dbus.Call, 1)
deviceObj.GoVerifyStop(0, stopCallCh)
select {
case call := <-stopCallCh:
logger.Debug(tx, "VerifyStop done")
if call.Err != nil {
logger.Warning(err)
}
case <-time.After(10 * time.Second):
logger.Warning(tx, "VerifyStop timed out")
}
switch status {
case "verify-no-match":
continue0 = true
case "verify-match":
ok = true
}
} else {
logger.Debug(tx, "claim lost, do not call VerifyStop")
// verify failed, no continue
}
return
}
func verifyResultStrToMsg(result string, isSwipe bool) string {
switch result {
case "verify-no-match":
return msgVerificationFailed
case "verify-retry-scan":
if isSwipe {
return "Swipe your finger again"
} else {
return "Place your finger on the reader again"
}
case "verify-swipe-too-short":
return "Swipe was too short, try again"
case "verify-finger-not-centered":
return "Your finger was not centered, try swiping your finger again"
case "verify-remove-and-retry":
return "Remove your finger, and try swiping your finger again"
default:
return ""
}
}
func getFprintMsg(locale, msgId string) string {
gettext.SetLocale(gettext.LC_ALL, locale)
domain := "fprintd"
switch msgId {
case "":
return ""
case msgVerificationFailed, msgVerificationTimedOut:
domain = "dde-daemon"
}
text := gettext.DGettext(domain, msgId)
if utf8.ValidString(text) {
return text
}
return msgId
}
func (tx *FPrintTransaction) SetUser(sender dbus.Sender, user string) *dbus.Error {
tx.parent.service.DelayAutoQuit()
if err := tx.checkSender(sender); err != nil {
return err
}
logger.Debug(tx, "SetUser", sender, user)
tx.PropsMu.Lock()
defer tx.PropsMu.Unlock()
if tx.Authenticating {
return dbusutil.ToError(errors.New("transaction busy"))
}
tx.setUser(user)
return nil
}
func (tx *FPrintTransaction) End(sender dbus.Sender) *dbus.Error {
tx.parent.service.DelayAutoQuit()
err := tx.checkSender(sender)
if err != nil {
return err
}
logger.Debugf("%s End sender: %s", tx, sender)
if tx.hasEnded() {
logger.Warningf("%s End sender: %s, tx has ended", tx, sender)
return dbusutil.ToError(errTxEnd)
}
tx.clearSecret()
tx.markEnd()
tx.PropsMu.Lock()
inAuth := tx.Authenticating
tx.PropsMu.Unlock()
if inAuth {
logger.Debug(tx, "force quit")
close(tx.quit)
<-tx.release // wait tx.release chan closed
}
tx.parent.deleteTx(tx.id)
return nil
}
func killFPrintDaemon() {
logger.Debug("kill fprintd")
err := exec.Command("pkill", "-f", "/usr/lib/fprintd/fprintd").Run()
if err != nil {
logger.Warning("failed to kill fprintd:", err)
}
}