1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
#include "askpassphrasedialog.h"
#include "ui_askpassphrasedialog.h"
#include "guiconstants.h"
#include "walletmodel.h"
#include <QMessageBox>
#include <QPushButton>
#include <QKeyEvent>
AskPassphraseDialog::AskPassphraseDialog(Mode mode, QWidget *parent) :
QDialog(parent),
ui(new Ui::AskPassphraseDialog),
mode(mode),
model(0),
fCapsLock(false)
{
ui->setupUi(this);
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->passLabel1->hide();
ui->passEdit1->hide();
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>."));
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 and new passphrase to the wallet."));
break;
}
textChanged();
connect(ui->passEdit1, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
connect(ui->passEdit2, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
connect(ui->passEdit3, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
}
AskPassphraseDialog::~AskPassphraseDialog()
{
// Attempt to overwrite text so that they do not linger around in memory
ui->passEdit1->setText(QString(" ").repeated(ui->passEdit1->text().size()));
ui->passEdit2->setText(QString(" ").repeated(ui->passEdit2->text().size()));
ui->passEdit3->setText(QString(" ").repeated(ui->passEdit3->text().size()));
delete ui;
}
void AskPassphraseDialog::setModel(WalletModel *model)
{
this->model = model;
}
void AskPassphraseDialog::accept()
{
SecureString oldpass, newpass1, newpass2;
if(!model)
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());
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 BITCOINS</b>!\nAre you sure you wish to encrypt your wallet?"),
QMessageBox::Yes|QMessageBox::Cancel,
QMessageBox::Cancel);
if(retval == QMessageBox::Yes)
{
if(newpass1 == newpass2)
{
if(model->setWalletEncrypted(true, newpass1))
{
QMessageBox::warning(this, tr("Wallet encrypted"),
"<qt>" +
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.") +
"<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>");
QApplication::quit();
}
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
{
QMessageBox::critical(this, tr("Wallet encryption failed"),
tr("The supplied passphrases do not match."));
}
}
else
{
QDialog::reject(); // Cancelled
}
} break;
case Unlock:
if(!model->setWalletLocked(false, oldpass))
{
QMessageBox::critical(this, tr("Wallet unlock failed"),
tr("The passphrase entered for the wallet decryption was incorrect."));
}
else
{
QDialog::accept(); // Success
}
break;
case Decrypt:
if(!model->setWalletEncrypted(false, oldpass))
{
QMessageBox::critical(this, tr("Wallet decryption failed"),
tr("The passphrase entered for the wallet decryption was incorrect."));
}
else
{
QDialog::accept(); // Success
}
break;
case ChangePass:
if(newpass1 == newpass2)
{
if(model->changePassphrase(oldpass, newpass1))
{
QMessageBox::information(this, tr("Wallet encrypted"),
tr("Wallet passphrase was succesfully changed."));
QDialog::accept(); // Success
}
else
{
QMessageBox::critical(this, tr("Wallet encryption failed"),
tr("The passphrase entered for the wallet decryption was incorrect."));
}
}
else
{
QMessageBox::critical(this, tr("Wallet encryption failed"),
tr("The supplied passphrases do not match."));
}
break;
}
}
void AskPassphraseDialog::textChanged()
{
// Validate input, set Ok button to enabled when accepable
bool acceptable = false;
switch(mode)
{
case Encrypt: // New passphrase x2
acceptable = !ui->passEdit2->text().isEmpty() && !ui->passEdit3->text().isEmpty();
break;
case Unlock: // Old passphrase x1
case Decrypt:
acceptable = !ui->passEdit1->text().isEmpty();
break;
case ChangePass: // Old passphrase x1, new passphrase x2
acceptable = !ui->passEdit1->text().isEmpty() && !ui->passEdit2->text().isEmpty() && !ui->passEdit3->text().isEmpty();
break;
}
ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(acceptable);
}
bool AskPassphraseDialog::event(QEvent *event)
{
// Detect Caps Lock key press.
if (event->type() == QEvent::KeyPress) {
QKeyEvent *ke = static_cast<QKeyEvent *>(event);
if (ke->key() == Qt::Key_CapsLock) {
fCapsLock = !fCapsLock;
}
if (fCapsLock) {
ui->capsLabel->setText(tr("Warning: The Caps Lock key is on."));
} else {
ui->capsLabel->clear();
}
}
return QWidget::event(event);
}
bool AskPassphraseDialog::eventFilter(QObject *, QEvent *event)
{
/* Detect Caps Lock.
* There is no good OS-independent way to check a key state in Qt, but we
* can detect Caps Lock by checking for the following condition:
* Shift key is down and the result is a lower case character, or
* Shift key is not down and the result is an upper case character.
*/
if (event->type() == QEvent::KeyPress) {
QKeyEvent *ke = static_cast<QKeyEvent *>(event);
QString str = ke->text();
if (str.length() != 0) {
const QChar *psz = str.unicode();
bool fShift = (ke->modifiers() & Qt::ShiftModifier) != 0;
if ((fShift && psz->isLower()) || (!fShift && psz->isUpper())) {
fCapsLock = true;
ui->capsLabel->setText(tr("Warning: The Caps Lock key is on."));
} else if (psz->isLetter()) {
fCapsLock = false;
ui->capsLabel->clear();
}
}
}
return false;
}
|
