<commit_before>// Copyright (c) 2011-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <qt/askpassphrasedialog.h>
#include <qt/forms/ui_askpassphrasedialog.h>

#include <qt/guiconstants.h>
#include <qt/walletmodel.h>

#include <support/allocators/secure.h>

#include <QKeyEvent>
#include <QMessageBox>
#include <QPushButton>

AskPassphraseDialog::AskPassphraseDialog(Mode _mode, QWidget *parent, SecureString* passphrase_out) :
    QDialog(parent),
    ui(new Ui::AskPassphraseDialog),
    mode(_mode),
    model(nullptr),
    fCapsLock(false),
    m_passphrase_out(passphrase_out)
{
    ui->setupUi(this);

    ui->passEdit1->setMinimumSize(ui->passEdit1->sizeHint());
    ui->passEdit2->setMinimumSize(ui->passEdit2->sizeHint());
    ui->passEdit3->setMinimumSize(ui->passEdit3->sizeHint());

    ui->passEdit1->setMaxLength(MAX_PASSPHRASE_SIZE);
    ui->passEdit2->setMaxLength(MAX_PASSPHRASE_SIZE);
    ui->passEdit3->setMaxLength(MAX_PASSPHRASE_SIZE);

    // Setup Caps Lock detection.
    ui->passEdit1->installEventFilter(this);
    ui->passEdit2->installEventFilter(this);
    ui->passEdit3->installEventFilter(this);

    switch(mode)
    {
        case Encrypt: // Ask passphrase x2
            ui->warningLabel->setText(tr("Enter the new passphrase for the wallet.<br/>Please use a passphrase of <b>ten or more random characters</b>, or <b>eight or more words</b>."));
            ui->passLabel1->hide();
            ui->passEdit1->hide();
            setWindowTitle(tr("Encrypt wallet"));
            break;
        case Unlock: // Ask passphrase
            ui->warningLabel->setText(tr("This operation needs your wallet passphrase to unlock the wallet."));
            ui->passLabel2->hide();
            ui->passEdit2->hide();
            ui->passLabel3->hide();
            ui->passEdit3->hide();
            setWindowTitle(tr("Unlock wallet"));
            break;
        case Decrypt:   // Ask passphrase
            ui->warningLabel->setText(tr("This operation needs your wallet passphrase to decrypt the wallet."));
            ui->passLabel2->hide();
            ui->passEdit2->hide();
            ui->passLabel3->hide();
            ui->passEdit3->hide();
            setWindowTitle(tr("Decrypt wallet"));
            break;
        case ChangePass: // Ask old passphrase + new passphrase x2
            setWindowTitle(tr("Change passphrase"));
            ui->warningLabel->setText(tr("Enter the old passphrase and new passphrase for the wallet."));
            break;
    }
    textChanged();
    connect(ui->toggleShowPasswordButton, &QPushButton::toggled, this, &AskPassphraseDialog::toggleShowPassword);
    connect(ui->passEdit1, &QLineEdit::textChanged, this, &AskPassphraseDialog::textChanged);
    connect(ui->passEdit2, &QLineEdit::textChanged, this, &AskPassphraseDialog::textChanged);
    connect(ui->passEdit3, &QLineEdit::textChanged, this, &AskPassphraseDialog::textChanged);
}

AskPassphraseDialog::~AskPassphraseDialog()
{
    secureClearPassFields();
    delete ui;
}

void AskPassphraseDialog::setModel(WalletModel *_model)
{
    this->model = _model;
}

void AskPassphraseDialog::accept()
{
    SecureString oldpass, newpass1, newpass2;
    if (!model && mode != Encrypt)
        return;
    oldpass.reserve(MAX_PASSPHRASE_SIZE);
    newpass1.reserve(MAX_PASSPHRASE_SIZE);
    newpass2.reserve(MAX_PASSPHRASE_SIZE);
    // TODO: get rid of this .c_str() by implementing SecureString::operator=(std::string)
    // Alternately, find a way to make this input mlock()'d to begin with.
    oldpass.assign(ui->passEdit1->text().toStdString().c_str());
    newpass1.assign(ui->passEdit2->text().toStdString().c_str());
    newpass2.assign(ui->passEdit3->text().toStdString().c_str());

    secureClearPassFields();

    switch(mode)
    {
    case Encrypt: {
        if(newpass1.empty() || newpass2.empty())
        {
            // Cannot encrypt with empty passphrase
            break;
        }
        QMessageBox::StandardButton retval = QMessageBox::question(this, tr("Confirm wallet encryption"),
                 tr("Warning: If you encrypt your wallet and lose your passphrase, you will <b>LOSE ALL OF YOUR VERTCOIN</b>!") + "<br><br>" + tr("Are you sure you wish to encrypt your wallet?"),
                 QMessageBox::Yes|QMessageBox::Cancel,
                 QMessageBox::Cancel);
        if(retval == QMessageBox::Yes)
        {
            if(newpass1 == newpass2)
            {
                QString encryption_reminder = tr("Remember that encrypting your wallet cannot fully protect "
                "your vertcoin from being stolen by malware infecting your computer.");
                if (m_passphrase_out) {
                    m_passphrase_out->assign(newpass1);
                    QMessageBox::warning(this, tr("Wallet to be encrypted"),
                                         "<qt>" +
                                         tr("Your wallet is about to be encrypted. ") + encryption_reminder +
                                         "</b></qt>");
                } else {
                    assert(model != nullptr);
                    if(model->setWalletEncrypted(true, newpass1))
                    {
                        QMessageBox::warning(this, tr("Wallet encrypted"),
                                             "<qt>" +
                                             tr("Your wallet is now encrypted. ") + encryption_reminder +
                                             "<br><br><b>" +
                                             tr("IMPORTANT: Any previous backups you have made of your wallet file "
                                             "should be replaced with the newly generated, encrypted wallet file. "
                                             "For security reasons, previous backups of the unencrypted wallet file "
                                             "will become useless as soon as you start using the new, encrypted wallet.") +
                                             "</b></qt>");
                    }
                    else
                    {
                        QMessageBox::critical(this, tr("Wallet encryption failed"),
                                             tr("Wallet encryption failed due to an internal error. Your wallet was not encrypted."));
                    }
                }
                QDialog::accept(); // Success
            }
            else
            {<commit_msg>Update askpassphrasedialog.cpp<commit_after>// Copyright (c) 2011-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <qt/askpassphrasedialog.h>
#include <qt/forms/ui_askpassphrasedialog.h>

#include <qt/guiconstants.h>
#include <qt/walletmodel.h>

#include <support/allocators/secure.h>

#include <QKeyEvent>
#include <QMessageBox>
#include <QPushButton>

AskPassphraseDialog::AskPassphraseDialog(Mode _mode, QWidget *parent, SecureString* passphrase_out) :
    QDialog(parent),
    ui(new Ui::AskPassphraseDialog),
    mode(_mode),
    model(nullptr),
    fCapsLock(false),
    m_passphrase_out(passphrase_out)
{
    ui->setupUi(this);

    ui->passEdit1->setMinimumSize(ui->passEdit1->sizeHint());
    ui->passEdit2->setMinimumSize(ui->passEdit2->sizeHint());
    ui->passEdit3->setMinimumSize(ui->passEdit3->sizeHint());

    ui->passEdit1->setMaxLength(MAX_PASSPHRASE_SIZE);
    ui->passEdit2->setMaxLength(MAX_PASSPHRASE_SIZE);
    ui->passEdit3->setMaxLength(MAX_PASSPHRASE_SIZE);

    // Setup Caps Lock detection.
    ui->passEdit1->installEventFilter(this);
    ui->passEdit2->installEventFilter(this);
    ui->passEdit3->installEventFilter(this);

    switch(mode)
    {
        case Encrypt: // Ask passphrase x2
            ui->warningLabel->setText(tr("Enter the new passphrase for the wallet.<br/>Please use a passphrase of <b>ten or more random characters</b>, or <b>eight or more words</b>."));
            ui->passLabel1->hide();
            ui->passEdit1->hide();
            setWindowTitle(tr("Encrypt wallet"));
            break;
        case Unlock: // Ask passphrase
            ui->warningLabel->setText(tr("This operation needs your wallet passphrase to unlock the wallet."));
            ui->passLabel2->hide();
            ui->passEdit2->hide();
            ui->passLabel3->hide();
            ui->passEdit3->hide();
            setWindowTitle(tr("Unlock wallet"));
            break;
        case Decrypt:   // Ask passphrase
            ui->warningLabel->setText(tr("This operation needs your wallet passphrase to decrypt the wallet."));
            ui->passLabel2->hide();
            ui->passEdit2->hide();
            ui->passLabel3->hide();
            ui->passEdit3->hide();
            setWindowTitle(tr("Decrypt wallet"));
            break;
        case ChangePass: // Ask old passphrase + new passphrase x2
            setWindowTitle(tr("Change passphrase"));
            ui->warningLabel->setText(tr("Enter the old passphrase and new passphrase for the wallet."));
            break;
    }
    textChanged();
    connect(ui->toggleShowPasswordButton, &QPushButton::toggled, this, &AskPassphraseDialog::toggleShowPassword);
    connect(ui->passEdit1, &QLineEdit::textChanged, this, &AskPassphraseDialog::textChanged);
    connect(ui->passEdit2, &QLineEdit::textChanged, this, &AskPassphraseDialog::textChanged);
    connect(ui->passEdit3, &QLineEdit::textChanged, this, &AskPassphraseDialog::textChanged);
}

AskPassphraseDialog::~AskPassphraseDialog()
{
    secureClearPassFields();
    delete ui;
}

void AskPassphraseDialog::setModel(WalletModel *_model)
{
    this->model = _model;
}

void AskPassphraseDialog::accept()
{
    SecureString oldpass, newpass1, newpass2;
    if (!model && mode != Encrypt)
        return;
    oldpass.reserve(MAX_PASSPHRASE_SIZE);
    newpass1.reserve(MAX_PASSPHRASE_SIZE);
    newpass2.reserve(MAX_PASSPHRASE_SIZE);
    // TODO: get rid of this .c_str() by implementing SecureString::operator=(std::string)
    // Alternately, find a way to make this input mlock()'d to begin with.
    oldpass.assign(ui->passEdit1->text().toStdString().c_str());
    newpass1.assign(ui->passEdit2->text().toStdString().c_str());
    newpass2.assign(ui->passEdit3->text().toStdString().c_str());

    secureClearPassFields();

    switch(mode)
    {
    case Encrypt: {
        if(newpass1.empty() || newpass2.empty())
        {
            // Cannot encrypt with empty passphrase
            break;
        }
        QMessageBox::StandardButton retval = QMessageBox::question(this, tr("Confirm wallet encryption"),
                 tr("Warning: If you encrypt your wallet and lose your passphrase, you will <b>LOSE ALL OF YOUR VERTCOIN</b>!") + "<br><br>" + tr("Are you sure you wish to encrypt your wallet?"),
                 QMessageBox::Yes|QMessageBox::Cancel,
                 QMessageBox::Cancel);
        if(retval == QMessageBox::Yes)
        {
            if(newpass1 == newpass2)
            {
                QString encryption_reminder = tr("Remember that encrypting your wallet cannot fully protect "
                "your vertcoins from being stolen by malware infecting your computer.");
                if (m_passphrase_out) {
                    m_passphrase_out->assign(newpass1);
                    QMessageBox::warning(this, tr("Wallet to be encrypted"),
                                         "<qt>" +
                                         tr("Your wallet is about to be encrypted. ") + encryption_reminder +
                                         "</b></qt>");
                } else {
                    assert(model != nullptr);
                    if(model->setWalletEncrypted(true, newpass1))
                    {
                        QMessageBox::warning(this, tr("Wallet encrypted"),
                                             "<qt>" +
                                             tr("Your wallet is now encrypted. ") + encryption_reminder +
                                             "<br><br><b>" +
                                             tr("IMPORTANT: Any previous backups you have made of your wallet file "
                                             "should be replaced with the newly generated, encrypted wallet file. "
                                             "For security reasons, previous backups of the unencrypted wallet file "
                                             "will become useless as soon as you start using the new, encrypted wallet.") +
                                             "</b></qt>");
                    }
                    else
                    {
                        QMessageBox::critical(this, tr("Wallet encryption failed"),
                                             tr("Wallet encryption failed due to an internal error. Your wallet was not encrypted."));
                    }
                }
                QDialog::accept(); // Success
            }
            else
            {
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