Implemented remote credential storage via qtkeychain

Imported qtkeychain

FossilOrigin-Name: 7c068aa8acdae1b86dee004d2d4cd7fb42904186

ext/qtkeychain/keychain_win.cpp

@@ -0,0 +1,107 @@
+/******************************************************************************
+ *   Copyright (C) 2011-2015 Frank Osterfeld <frank.osterfeld@gmail.com>      *
+ *                                                                            *
+ * This program is distributed in the hope that it will be useful, but        *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE. For licensing and distribution        *
+ * details, check the accompanying file 'COPYING'.                            *
+ *****************************************************************************/
+#include "keychain_p.h"
+
+#include <QSettings>
+
+#include <windows.h>
+#include <wincrypt.h>
+
+#include <memory>
+
+using namespace QKeychain;
+
+void ReadPasswordJobPrivate::scheduledStart() {
+    //Use settings member if there, create local settings object if not
+    std::auto_ptr<QSettings> local( !q->settings() ? new QSettings( q->service() ) : 0 );
+    QSettings* actual = q->settings() ? q->settings() : local.get();
+
+    QByteArray encrypted = actual->value( key ).toByteArray();
+    if ( encrypted.isNull() ) {
+        q->emitFinishedWithError( EntryNotFound, tr("Entry not found") );
+        return;
+    }
+
+    DATA_BLOB blob_in, blob_out;
+
+    blob_in.pbData = reinterpret_cast<BYTE*>( encrypted.data() );
+    blob_in.cbData = encrypted.size();
+
+    const BOOL ret = CryptUnprotectData( &blob_in,
+                                        NULL,
+                                         NULL,
+                                         NULL,
+                                         NULL,
+                                         0,
+                                         &blob_out );
+    if ( !ret ) {
+        q->emitFinishedWithError( OtherError, tr("Could not decrypt data") );
+        return;
+    }
+
+    data = QByteArray( reinterpret_cast<char*>( blob_out.pbData ), blob_out.cbData );
+    SecureZeroMemory( blob_out.pbData, blob_out.cbData );
+    LocalFree( blob_out.pbData );
+
+    q->emitFinished();
+}
+
+void WritePasswordJobPrivate::scheduledStart() {
+    if ( mode == Delete ) {
+        //Use settings member if there, create local settings object if not
+        std::auto_ptr<QSettings> local( !q->settings() ? new QSettings( q->service() ) : 0 );
+        QSettings* actual = q->settings() ? q->settings() : local.get();
+        actual->remove( key );
+        actual->sync();
+        if ( actual->status() != QSettings::NoError ) {
+            const QString err = actual->status() == QSettings::AccessError
+                    ? tr("Could not delete encrypted data from settings: access error")
+                    : tr("Could not delete encrypted data from settings: format error");
+            q->emitFinishedWithError( OtherError, err );
+        } else {
+            q->emitFinished();
+        }
+        return;
+    }
+
+    QByteArray data = mode == Binary ? binaryData : textData.toUtf8();
+    DATA_BLOB blob_in, blob_out;
+    blob_in.pbData = reinterpret_cast<BYTE*>( data.data() );
+    blob_in.cbData = data.size();
+    const BOOL res = CryptProtectData( &blob_in,
+                                       L"QKeychain-encrypted data",
+                                       NULL,
+                                       NULL,
+                                       NULL,
+                                       0,
+                                       &blob_out );
+    if ( !res ) {
+        q->emitFinishedWithError( OtherError, tr("Encryption failed") ); //TODO more details available?
+        return;
+    }
+
+    const QByteArray encrypted( reinterpret_cast<char*>( blob_out.pbData ), blob_out.cbData );
+    LocalFree( blob_out.pbData );
+
+    //Use settings member if there, create local settings object if not
+    std::auto_ptr<QSettings> local( !q->settings() ? new QSettings( q->service() ) : 0 );
+    QSettings* actual = q->settings() ? q->settings() : local.get();
+    actual->setValue( key, encrypted );
+    actual->sync();
+    if ( actual->status() != QSettings::NoError ) {
+
+        const QString errorString = actual->status() == QSettings::AccessError
+                ? tr("Could not store encrypted data in settings: access error")
+                : tr("Could not store encrypted data in settings: format error");
+        q->emitFinishedWithError( OtherError, errorString );
+        return;
+    }
+
+    q->emitFinished();
+}