check seed in gui. fixes #622

gui/qt/installwizard.py

@@ -134,6 +134,10 @@ class InstallWizard(QDialog):
             QMessageBox.warning(None, _('Error'), _('No seed'), _('OK'))
             return
 
+        if not Wallet.is_seed(seed):
+            QMessageBox.warning(None, _('Error'), _('Invalid seed'), _('OK'))
+            return
+
         return seed
 
 
@@ -272,7 +276,7 @@ class InstallWizard(QDialog):
 
         elif action == 'restore':
             seed = self.seed_dialog()
-            if not seed:
+            if not Wallet.is_seed(seed):
                 return
             wallet = Wallet.from_seed(seed, self.storage)
             ok, old_password, password = self.password_dialog(wallet)

gui/qt/main_window.py

@@ -1141,6 +1141,7 @@ class ElectrumWindow(QMainWindow):
             menu.addAction(_("Copy to clipboard"), lambda: self.app.clipboard().setText(addr))
             menu.addAction(_("QR code"), lambda: self.show_qrcode("bitcoin:" + addr, _("Address")) )
             menu.addAction(_("Edit label"), lambda: self.edit_label(True))
+            menu.addAction(_("Public keys"), lambda: self.show_public_keys(addr))
             if self.wallet.seed:
                 menu.addAction(_("Private key"), lambda: self.show_private_key(addr))
                 menu.addAction(_("Sign/verify message"), lambda: self.sign_verify_message(addr))
@@ -1667,6 +1668,30 @@ class ElectrumWindow(QMainWindow):
         apply( func, args)
 
 
+    def show_public_keys(self, address):
+        if not address: return
+        try:
+            pubkey_list = self.wallet.get_public_keys(address)
+        except Exception as e:
+            traceback.print_exc(file=sys.stdout)
+            self.show_message(str(e))
+            return
+
+        d = QDialog(self)
+        d.setMinimumSize(600, 200)
+        d.setModal(1)
+        vbox = QVBoxLayout()
+        vbox.addWidget( QLabel(_("Address") + ': ' + address))
+        vbox.addWidget( QLabel(_("Public key") + ':'))
+        keys = QTextEdit()
+        keys.setReadOnly(True)
+        keys.setText('\n'.join(pubkey_list))
+        vbox.addWidget(keys)
+        #vbox.addWidget( QRCodeWidget('\n'.join(pk_list)) )
+        vbox.addLayout(close_button(d))
+        d.setLayout(vbox)
+        d.exec_()
+
     @protected
     def show_private_key(self, address, password):
         if not address: return

lib/bitcoin.py

@@ -71,7 +71,25 @@ def mnemonic_to_seed(mnemonic, passphrase):
     return PBKDF2(mnemonic, 'mnemonic' + passphrase, iterations = PBKDF2_ROUNDS, macmodule = hmac, digestmodule = hashlib.sha512).read(64)
 
 from version import SEED_PREFIX
-is_seed = lambda x: hmac_sha_512("Seed version", x).encode('hex')[0:2].startswith(SEED_PREFIX)
+is_new_seed = lambda x: hmac_sha_512("Seed version", x).encode('hex')[0:2].startswith(SEED_PREFIX)
+
+def is_old_seed(seed):
+    import mnemonic
+    words = seed.strip().split()
+    try:
+        mnemonic.mn_decode(words)
+        uses_electrum_words = True
+    except Exception:
+        uses_electrum_words = False
+
+    try:
+        seed.decode('hex')
+        is_hex = True
+    except Exception:
+        is_hex = False
+         
+    return is_hex or (uses_electrum_words and len(words) == 12)
+
 
 # pywallet openssl private key implementation
 

lib/wallet.py

@@ -288,7 +288,7 @@ class NewWallet:
             # we keep only 13 words, that's approximately 139 bits of entropy
             words = mnemonic.mn_encode(s)[0:13] 
             seed = ' '.join(words)
-            if is_seed(seed):
+            if is_new_seed(seed):
                 break  # this will remove 8 bits of entropy
             nonce += 1
 
@@ -1781,36 +1781,23 @@ class Wallet(object):
 
 
     @classmethod
-    def from_seed(self, seed, storage):
-        import mnemonic
+    def is_seed(self, seed):
         if not seed:
-            return 
-
-        words = seed.strip().split()
-        try:
-            mnemonic.mn_decode(words)
-            uses_electrum_words = True
-        except Exception:
-            uses_electrum_words = False
-
-        try:
-            seed.decode('hex')
-            is_hex = True
-        except Exception:
-            is_hex = False
-         
-        if is_hex or (uses_electrum_words and len(words) == 12):
-            #print "old style wallet", len(words), words
-            w = OldWallet(storage)
-            w.init_seed(seed) #hex
+            return False
+        elif is_old_seed(seed):
+            return OldWallet
+        elif is_new_seed(seed):
+            return NewWallet
         else: 
-            assert is_seed(seed)
-            w = NewWallet(storage)
+            return False
+
+    @classmethod
+    def from_seed(self, seed, storage):
+        klass = self.is_seed(seed)
+        w = klass(storage)
         w.init_seed(seed)
-
         return w
 
-
     @classmethod
     def from_mpk(self, mpk, storage):