accounts/scwallet: display PUK retry count, validate PIN/PUK length

accounts/scwallet/wallet.go

@@ -27,6 +27,7 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
+	"regexp"
 	"sort"
 	"strings"
 	"sync"
@@ -310,8 +311,10 @@ func (w *Wallet) Status() (string, error) {
 		return fmt.Sprintf("Failed: %v", err), err
 	}
 	switch {
+	case !w.session.verified && status.PinRetryCount == 0 && status.PukRetryCount == 0:
+		return fmt.Sprintf("Bricked, waiting for full wipe"), nil
 	case !w.session.verified && status.PinRetryCount == 0:
-		return fmt.Sprintf("Blocked, waiting for PUK and new PIN"), nil
+		return fmt.Sprintf("Blocked, waiting for PUK (%d attempts left) and new PIN", status.PukRetryCount), nil
 	case !w.session.verified:
 		return fmt.Sprintf("Locked, waiting for PIN (%d attempts left)", status.PinRetryCount), nil
 	case !status.Initialized:
@@ -377,10 +380,18 @@ func (w *Wallet) Open(passphrase string) error {
 	case passphrase == "":
 		return ErrPINUnblockNeeded
 	case status.PinRetryCount > 0:
+		if !regexp.MustCompile(`^[0-9]{6,}$`).MatchString(passphrase) {
+			w.log.Error("PIN needs to be at least 6 digits")
+			return ErrPINNeeded
+		}
 		if err := w.session.verifyPin([]byte(passphrase)); err != nil {
 			return err
 		}
 	default:
+		if !regexp.MustCompile(`^[0-9]{12,}$`).MatchString(passphrase) {
+			w.log.Error("PUK needs to be at least 12 digits")
+			return ErrPINUnblockNeeded
+		}
 		if err := w.session.unblockPin([]byte(passphrase)); err != nil {
 			return err
 		}