1 files changed, 104 insertions, 0 deletions
diff --git a/src/qt/verifymessagedialog.cpp b/src/qt/verifymessagedialog.cpp
new file mode 100644
index 0000000000..0bac24820c
--- /dev/null
+++ b/src/qt/verifymessagedialog.cpp
@@ -0,0 +1,104 @@
+#include "verifymessagedialog.h"
+#include "ui_verifymessagedialog.h"
+
+#include <string>
+#include <vector>
+
+#include <QDialogButtonBox>
+#include <QAbstractButton>
+#include <QClipboard>
+#include <QMessageBox>
+
+#include "main.h"
+#include "wallet.h"
+#include "walletmodel.h"
+#include "addresstablemodel.h"
+#include "guiutil.h"
+
+VerifyMessageDialog::VerifyMessageDialog(AddressTableModel *addressModel, QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::VerifyMessageDialog),
+    model(addressModel)
+{
+    ui->setupUi(this);
+
+#if (QT_VERSION >= 0x040700)
+    /* Do not move this to the XML file, Qt before 4.7 will choke on it */
+    ui->lnSig->setPlaceholderText(tr("Enter Bitcoin signature"));
+    ui->lnAddress->setPlaceholderText(tr("Click \"Verify Message\" to obtain address"));
+#endif
+
+    GUIUtil::setupAddressWidget(ui->lnAddress, this);
+    ui->lnAddress->installEventFilter(this);
+
+    ui->edMessage->setFocus();
+}
+
+VerifyMessageDialog::~VerifyMessageDialog()
+{
+    delete ui;
+}
+
+bool VerifyMessageDialog::checkAddress()
+{
+    CDataStream ss(SER_GETHASH, 0);
+    ss << strMessageMagic;
+    ss << ui->edMessage->document()->toPlainText().toStdString();
+    uint256 hash = Hash(ss.begin(), ss.end());
+
+    bool invalid = true;
+    std::vector<unsigned char> vchSig = DecodeBase64(ui->lnSig->text().toStdString().c_str(), &invalid);
+
+    if(invalid)
+    {
+        QMessageBox::warning(this, tr("Invalid Signature"), tr("The signature could not be decoded. Please check the signature and try again."));
+        return false;
+    }
+
+    CKey key;
+    if(!key.SetCompactSignature(hash, vchSig))
+    {
+        QMessageBox::warning(this, tr("Invalid Signature"), tr("The signature did not match the message digest. Please check the signature and try again."));
+        return false;
+    }
+
+    CBitcoinAddress address(key.GetPubKey());
+    QString qStringAddress = QString::fromStdString(address.ToString());
+    ui->lnAddress->setText(qStringAddress);
+    ui->copyToClipboard->setEnabled(true);
+
+    QString label = model->labelForAddress(qStringAddress);
+    ui->lblStatus->setText(label.isEmpty() ? tr("Address not found in address book.") : tr("Address found in address book: %1").arg(label));
+    return true;
+}
+
+void VerifyMessageDialog::on_verifyMessage_clicked()
+{
+    checkAddress();
+}
+
+void VerifyMessageDialog::on_copyToClipboard_clicked()
+{
+    QApplication::clipboard()->setText(ui->lnAddress->text());
+}
+
+void VerifyMessageDialog::on_clearButton_clicked()
+{
+    ui->edMessage->clear();
+    ui->lnSig->clear();
+    ui->lnAddress->clear();
+    ui->lblStatus->clear();
+
+    ui->edMessage->setFocus();
+}
+
+bool VerifyMessageDialog::eventFilter(QObject *object, QEvent *event)
+{
+    if(object == ui->lnAddress && (event->type() == QEvent::MouseButtonPress ||
+                                   event->type() == QEvent::FocusIn))
+    {
+        ui->lnAddress->selectAll();
+        return true;
+    }
+    return QDialog::eventFilter(object, event);
+}