add message about restarting bitcoin after encrypting wallet succesfully
[novacoin.git] / src / qt / askpassphrasedialog.cpp
1 #include "askpassphrasedialog.h"
2 #include "ui_askpassphrasedialog.h"
3
4 #include "guiconstants.h"
5 #include "walletmodel.h"
6
7 #include <QMessageBox>
8 #include <QPushButton>
9
10 AskPassphraseDialog::AskPassphraseDialog(Mode mode, QWidget *parent) :
11     QDialog(parent),
12     ui(new Ui::AskPassphraseDialog),
13     mode(mode),
14     model(0)
15 {
16     ui->setupUi(this);
17     ui->passEdit1->setMaxLength(MAX_PASSPHRASE_SIZE);
18     ui->passEdit2->setMaxLength(MAX_PASSPHRASE_SIZE);
19     ui->passEdit3->setMaxLength(MAX_PASSPHRASE_SIZE);
20
21     switch(mode)
22     {
23         case Encrypt: // Ask passphrase x2
24             ui->passLabel1->hide();
25             ui->passEdit1->hide();
26             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>."));
27             setWindowTitle(tr("Encrypt wallet"));
28             break;
29         case Unlock: // Ask passphrase
30             ui->warningLabel->setText(tr("This operation needs your wallet passphrase to unlock the wallet."));
31             ui->passLabel2->hide();
32             ui->passEdit2->hide();
33             ui->passLabel3->hide();
34             ui->passEdit3->hide();
35             setWindowTitle(tr("Unlock wallet"));
36             break;
37         case Decrypt:   // Ask passphrase
38             ui->warningLabel->setText(tr("This operation needs your wallet passphrase to decrypt the wallet."));
39             ui->passLabel2->hide();
40             ui->passEdit2->hide();
41             ui->passLabel3->hide();
42             ui->passEdit3->hide();
43             setWindowTitle(tr("Decrypt wallet"));
44             break;
45         case ChangePass: // Ask old passphrase + new passphrase x2
46             setWindowTitle(tr("Change passphrase"));
47             ui->warningLabel->setText(tr("Enter the old and new passphrase to the wallet."));
48             break;
49     }
50     resize(minimumSize()); // Get rid of extra space in dialog
51
52     textChanged();
53     connect(ui->passEdit1, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
54     connect(ui->passEdit2, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
55     connect(ui->passEdit3, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
56 }
57
58 AskPassphraseDialog::~AskPassphraseDialog()
59 {
60     // Attempt to overwrite text so that they do not linger around in memory
61     ui->passEdit1->setText(QString(" ").repeated(ui->passEdit1->text().size()));
62     ui->passEdit2->setText(QString(" ").repeated(ui->passEdit2->text().size()));
63     ui->passEdit3->setText(QString(" ").repeated(ui->passEdit3->text().size()));
64     delete ui;
65 }
66
67 void AskPassphraseDialog::setModel(WalletModel *model)
68 {
69     this->model = model;
70 }
71
72 void AskPassphraseDialog::accept()
73 {
74     std::string oldpass, newpass1, newpass2;
75     if(!model)
76         return;
77     // TODO: mlock memory / munlock on return so they will not be swapped out, really need "mlockedstring" wrapper class to do this safely
78     oldpass.reserve(MAX_PASSPHRASE_SIZE);
79     newpass1.reserve(MAX_PASSPHRASE_SIZE);
80     newpass2.reserve(MAX_PASSPHRASE_SIZE);
81     oldpass.assign(ui->passEdit1->text().toStdString());
82     newpass1.assign(ui->passEdit2->text().toStdString());
83     newpass2.assign(ui->passEdit3->text().toStdString());
84
85     switch(mode)
86     {
87     case Encrypt: {
88         if(newpass1.empty() || newpass2.empty())
89         {
90             // Cannot encrypt with empty passphrase
91             break;
92         }
93         QMessageBox::StandardButton retval = QMessageBox::question(this, tr("Confirm wallet encryption"),
94                  tr("WARNING: If you encrypt your wallet and lose your passphrase, you will <b>LOSE ALL OF YOUR BITCOINS</b>!\nAre you sure you wish to encrypt your wallet?"),
95                  QMessageBox::Yes|QMessageBox::Cancel,
96                  QMessageBox::Cancel);
97         if(retval == QMessageBox::Yes)
98         {
99             if(newpass1 == newpass2)
100             {
101                 if(model->setWalletEncrypted(true, newpass1))
102                 {
103                     QMessageBox::warning(this, tr("Wallet encrypted"),
104                                          tr("Bitcoin will close now to finish the encryption process. Remember that encrypting your wallet cannot fully protect your bitcoins from being stolen by malware infecting your computer."));
105                     QApplication::quit();
106                 }
107                 else
108                 {
109                     QMessageBox::critical(this, tr("Wallet encryption failed"),
110                                          tr("Wallet encryption failed due to an internal error. Your wallet was not encrypted."));
111                 }
112                 QDialog::accept(); // Success
113             }
114             else
115             {
116                 QMessageBox::critical(this, tr("Wallet encryption failed"),
117                                      tr("The supplied passphrases do not match."));
118             }
119         }
120         else
121         {
122             QDialog::reject(); // Cancelled
123         }
124         } break;
125     case Unlock:
126         if(!model->setWalletLocked(false, oldpass))
127         {
128             QMessageBox::critical(this, tr("Wallet unlock failed"),
129                                   tr("The passphrase entered for the wallet decryption was incorrect."));
130         }
131         else
132         {
133             QDialog::accept(); // Success
134         }
135         break;
136     case Decrypt:
137         if(!model->setWalletEncrypted(false, oldpass))
138         {
139             QMessageBox::critical(this, tr("Wallet decryption failed"),
140                                   tr("The passphrase entered for the wallet decryption was incorrect."));
141         }
142         else
143         {
144             QDialog::accept(); // Success
145         }
146         break;
147     case ChangePass:
148         if(newpass1 == newpass2)
149         {
150             if(model->changePassphrase(oldpass, newpass1))
151             {
152                 QMessageBox::information(this, tr("Wallet encrypted"),
153                                      tr("Wallet passphrase was succesfully changed."));
154                 QDialog::accept(); // Success
155             }
156             else
157             {
158                 QMessageBox::critical(this, tr("Wallet encryption failed"),
159                                      tr("The passphrase entered for the wallet decryption was incorrect."));
160             }
161         }
162         else
163         {
164             QMessageBox::critical(this, tr("Wallet encryption failed"),
165                                  tr("The supplied passphrases do not match."));
166         }
167         break;
168     }
169 }
170
171 void AskPassphraseDialog::textChanged()
172 {
173     // Validate input, set Ok button to enabled when accepable
174     bool acceptable = false;
175     switch(mode)
176     {
177     case Encrypt: // New passphrase x2
178         acceptable = !ui->passEdit2->text().isEmpty() && !ui->passEdit3->text().isEmpty();
179         break;
180     case Unlock: // Old passphrase x1
181     case Decrypt:
182         acceptable = !ui->passEdit1->text().isEmpty();
183         break;
184     case ChangePass: // Old passphrase x1, new passphrase x2
185         acceptable = !ui->passEdit1->text().isEmpty() && !ui->passEdit2->text().isEmpty() && !ui->passEdit3->text().isEmpty();
186         break;
187     }
188     ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(acceptable);
189 }