Add security error status

src/main/java/eu/siacs/conversations/entities/Account.java

@@ -52,7 +52,8 @@ public class Account extends AbstractEntity {
 		REGISTRATION_FAILED(true),
 		REGISTRATION_CONFLICT(true),
 		REGISTRATION_SUCCESSFUL,
-		REGISTRATION_NOT_SUPPORTED(true);
+		REGISTRATION_NOT_SUPPORTED(true),
+		SECURITY_ERROR(true);
 
 		private boolean isError;
 
@@ -92,6 +93,8 @@ public class Account extends AbstractEntity {
 					return R.string.account_status_regis_success;
 				case REGISTRATION_NOT_SUPPORTED:
 					return R.string.account_status_regis_not_sup;
+				case SECURITY_ERROR:
+					return R.string.account_status_security_error;
 				default:
 					return R.string.account_status_unknown;
 			}

src/main/java/eu/siacs/conversations/ui/adapter/AccountAdapter.java

@@ -92,6 +92,10 @@ public class AccountAdapter extends ArrayAdapter<Account> {
 					R.string.account_status_regis_not_sup));
 			statusView.setTextColor(activity.getWarningTextColor());
 			break;
+		case SECURITY_ERROR:
+			statusView.setText(getContext().getString
+					(R.string.account_status_security_error));
+			statusView.setTextColor(activity.getWarningTextColor());
 		default:
 			statusView.setText("");
 			break;

src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java

@@ -649,6 +649,7 @@ public class XmppConnection implements Runnable {
 							") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
 							"). Possible downgrade attack?");
 					disconnect(true);
+					account.setStatus(Account.State.SECURITY_ERROR);
 				}
 			} catch (final JSONException e) {
 				Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");

src/main/res/values/strings.xml

@@ -141,6 +141,7 @@
     <string name="account_status_regis_conflict">Username already in use</string>
     <string name="account_status_regis_success">Registration completed</string>
     <string name="account_status_regis_not_sup">Server does not support registration</string>
+    <string name="account_status_security_error">Security error</string>
     <string name="encryption_choice_none">Plain text</string>
     <string name="encryption_choice_otr">OTR</string>
     <string name="encryption_choice_pgp">OpenPGP</string>