248 lines
9.4 KiB
C++
248 lines
9.4 KiB
C++
#include "askpassphrasedialog.h"
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#include "ui_askpassphrasedialog.h"
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#include "guiconstants.h"
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#include "walletmodel.h"
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#include <QMessageBox>
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#include <QPushButton>
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#include <QKeyEvent>
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AskPassphraseDialog::AskPassphraseDialog(Mode mode, QWidget *parent) :
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QDialog(parent),
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ui(new Ui::AskPassphraseDialog),
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mode(mode),
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model(0),
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fCapsLock(false)
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{
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ui->setupUi(this);
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ui->passEdit1->setMaxLength(MAX_PASSPHRASE_SIZE);
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ui->passEdit2->setMaxLength(MAX_PASSPHRASE_SIZE);
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ui->passEdit3->setMaxLength(MAX_PASSPHRASE_SIZE);
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// Setup Caps Lock detection.
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ui->passEdit1->installEventFilter(this);
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ui->passEdit2->installEventFilter(this);
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ui->passEdit3->installEventFilter(this);
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switch(mode)
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{
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case Encrypt: // Ask passphrase x2
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ui->passLabel1->hide();
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ui->passEdit1->hide();
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ui->warningLabel->setText(tr("Enter the new passphrase to the wallet.<br/>Please use a passphrase of <b>10 or more random characters</b>, or <b>eight or more words</b>."));
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setWindowTitle(tr("Encrypt wallet"));
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break;
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case Unlock: // Ask passphrase
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ui->warningLabel->setText(tr("This operation needs your wallet passphrase to unlock the wallet."));
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ui->passLabel2->hide();
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ui->passEdit2->hide();
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ui->passLabel3->hide();
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ui->passEdit3->hide();
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setWindowTitle(tr("Unlock wallet"));
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break;
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case Decrypt: // Ask passphrase
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ui->warningLabel->setText(tr("This operation needs your wallet passphrase to decrypt the wallet."));
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ui->passLabel2->hide();
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ui->passEdit2->hide();
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ui->passLabel3->hide();
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ui->passEdit3->hide();
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setWindowTitle(tr("Decrypt wallet"));
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break;
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case ChangePass: // Ask old passphrase + new passphrase x2
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setWindowTitle(tr("Change passphrase"));
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ui->warningLabel->setText(tr("Enter the old and new passphrase to the wallet."));
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break;
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}
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textChanged();
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connect(ui->passEdit1, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
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connect(ui->passEdit2, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
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connect(ui->passEdit3, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
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}
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AskPassphraseDialog::~AskPassphraseDialog()
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{
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// Attempt to overwrite text so that they do not linger around in memory
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ui->passEdit1->setText(QString(" ").repeated(ui->passEdit1->text().size()));
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ui->passEdit2->setText(QString(" ").repeated(ui->passEdit2->text().size()));
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ui->passEdit3->setText(QString(" ").repeated(ui->passEdit3->text().size()));
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delete ui;
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}
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void AskPassphraseDialog::setModel(WalletModel *model)
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{
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this->model = model;
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}
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void AskPassphraseDialog::accept()
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{
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SecureString oldpass, newpass1, newpass2;
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if(!model)
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return;
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oldpass.reserve(MAX_PASSPHRASE_SIZE);
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newpass1.reserve(MAX_PASSPHRASE_SIZE);
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newpass2.reserve(MAX_PASSPHRASE_SIZE);
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// TODO: get rid of this .c_str() by implementing SecureString::operator=(std::string)
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// Alternately, find a way to make this input mlock()'d to begin with.
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oldpass.assign(ui->passEdit1->text().toStdString().c_str());
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newpass1.assign(ui->passEdit2->text().toStdString().c_str());
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newpass2.assign(ui->passEdit3->text().toStdString().c_str());
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switch(mode)
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{
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case Encrypt: {
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if(newpass1.empty() || newpass2.empty())
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{
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// Cannot encrypt with empty passphrase
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break;
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}
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QMessageBox::StandardButton retval = QMessageBox::question(this, tr("Confirm wallet encryption"),
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tr("Warning: If you encrypt your wallet and lose your passphrase, you will <b>LOSE ALL OF YOUR BITCOINS</b>!") + "<br><br>" + tr("Are you sure you wish to encrypt your wallet?"),
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QMessageBox::Yes|QMessageBox::Cancel,
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QMessageBox::Cancel);
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if(retval == QMessageBox::Yes)
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{
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if(newpass1 == newpass2)
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{
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if(model->setWalletEncrypted(true, newpass1))
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{
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QMessageBox::warning(this, tr("Wallet encrypted"),
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"<qt>" +
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tr("Bitcoin will close now to finish the encryption process. "
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"Remember that encrypting your wallet cannot fully protect "
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"your bitcoins from being stolen by malware infecting your computer.") +
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"<br><br><b>" +
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tr("IMPORTANT: Any previous backups you have made of your wallet file "
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"should be replaced with the newly generated, encrypted wallet file. "
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"For security reasons, previous backups of the unencrypted wallet file "
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"will become useless as soon as you start using the new, encrypted wallet.") +
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"</b></qt>");
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QApplication::quit();
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}
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else
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{
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QMessageBox::critical(this, tr("Wallet encryption failed"),
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tr("Wallet encryption failed due to an internal error. Your wallet was not encrypted."));
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}
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QDialog::accept(); // Success
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}
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else
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{
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QMessageBox::critical(this, tr("Wallet encryption failed"),
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tr("The supplied passphrases do not match."));
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}
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}
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else
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{
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QDialog::reject(); // Cancelled
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}
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} break;
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case Unlock:
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if(!model->setWalletLocked(false, oldpass))
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{
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QMessageBox::critical(this, tr("Wallet unlock failed"),
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tr("The passphrase entered for the wallet decryption was incorrect."));
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}
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else
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{
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QDialog::accept(); // Success
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}
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break;
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case Decrypt:
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if(!model->setWalletEncrypted(false, oldpass))
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{
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QMessageBox::critical(this, tr("Wallet decryption failed"),
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tr("The passphrase entered for the wallet decryption was incorrect."));
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}
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else
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{
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QDialog::accept(); // Success
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}
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break;
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case ChangePass:
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if(newpass1 == newpass2)
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{
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if(model->changePassphrase(oldpass, newpass1))
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{
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QMessageBox::information(this, tr("Wallet encrypted"),
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tr("Wallet passphrase was successfully changed."));
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QDialog::accept(); // Success
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}
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else
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{
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QMessageBox::critical(this, tr("Wallet encryption failed"),
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tr("The passphrase entered for the wallet decryption was incorrect."));
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}
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}
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else
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{
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QMessageBox::critical(this, tr("Wallet encryption failed"),
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tr("The supplied passphrases do not match."));
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}
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break;
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}
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}
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void AskPassphraseDialog::textChanged()
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{
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// Validate input, set Ok button to enabled when acceptable
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bool acceptable = false;
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switch(mode)
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{
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case Encrypt: // New passphrase x2
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acceptable = !ui->passEdit2->text().isEmpty() && !ui->passEdit3->text().isEmpty();
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break;
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case Unlock: // Old passphrase x1
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case Decrypt:
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acceptable = !ui->passEdit1->text().isEmpty();
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break;
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case ChangePass: // Old passphrase x1, new passphrase x2
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acceptable = !ui->passEdit1->text().isEmpty() && !ui->passEdit2->text().isEmpty() && !ui->passEdit3->text().isEmpty();
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break;
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}
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ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(acceptable);
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}
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bool AskPassphraseDialog::event(QEvent *event)
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{
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// Detect Caps Lock key press.
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if (event->type() == QEvent::KeyPress) {
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QKeyEvent *ke = static_cast<QKeyEvent *>(event);
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if (ke->key() == Qt::Key_CapsLock) {
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fCapsLock = !fCapsLock;
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}
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if (fCapsLock) {
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ui->capsLabel->setText(tr("Warning: The Caps Lock key is on!"));
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} else {
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ui->capsLabel->clear();
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}
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}
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return QWidget::event(event);
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}
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bool AskPassphraseDialog::eventFilter(QObject *, QEvent *event)
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{
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/* Detect Caps Lock.
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* There is no good OS-independent way to check a key state in Qt, but we
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* can detect Caps Lock by checking for the following condition:
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* Shift key is down and the result is a lower case character, or
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* Shift key is not down and the result is an upper case character.
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*/
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if (event->type() == QEvent::KeyPress) {
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QKeyEvent *ke = static_cast<QKeyEvent *>(event);
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QString str = ke->text();
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if (str.length() != 0) {
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const QChar *psz = str.unicode();
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bool fShift = (ke->modifiers() & Qt::ShiftModifier) != 0;
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if ((fShift && psz->isLower()) || (!fShift && psz->isUpper())) {
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fCapsLock = true;
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ui->capsLabel->setText(tr("Warning: The Caps Lock key is on!"));
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} else if (psz->isLetter()) {
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fCapsLock = false;
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ui->capsLabel->clear();
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}
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}
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}
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return false;
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}
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