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Ability to check all passwords against online HIBP database
* Fixes keepassxreboot#1083 * Add online HIBP checker dialog to the database reports widget. Permission is requested from the user prior to performing any network operations. * The number of times a password has been found in a breach is shown to the user. * If no passwords are breached then a positive message is presented. * Source of HIBP icon: https://github.com/simple-icons/simple-icons/blob/develop/icons/haveibeenpwned.svg
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| /* | ||
| * Copyright (C) 2020 KeePassXC Team <[email protected]> | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 2 or (at your option) | ||
| * version 3 of the License. | ||
| * | ||
| * 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. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| #include "HibpDownloader.h" | ||
| #include "core/Config.h" | ||
| #include "core/Global.h" | ||
| #include "core/NetworkManager.h" | ||
|
|
||
| #include <QCryptographicHash> | ||
| #include <QUrl> | ||
| #include <QtNetwork> | ||
|
|
||
| namespace | ||
| { | ||
|
|
||
| /* | ||
| * Return the SHA1 hash of the specified password in upper-case hex. | ||
| * | ||
| * The result is always exactly 40 characters long. | ||
| */ | ||
| QString sha1Hex(const QString& password) | ||
| { | ||
| // Get the binary SHA1 | ||
| const auto sha1 = QCryptographicHash::hash(password.toUtf8(), QCryptographicHash::Sha1); | ||
|
|
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| // Convert to hex | ||
| QString ret; | ||
| ret.reserve(40); | ||
| auto p = sha1.data(); | ||
| for (int i = 0; i < sha1.size(); ++i) { | ||
| const auto u = uint8_t(*p++); | ||
| constexpr auto hex = "0123456789ABCDEF"; | ||
| ret += hex[(u >> 4) & 0xF]; | ||
| ret += hex[u & 0xF]; | ||
| } | ||
|
|
||
| return ret; | ||
| } | ||
|
|
||
| /* | ||
| * Search a password's hash in the output of the HIBP web service. | ||
| * | ||
| * Returns the number of times the password is found in breaches, or | ||
| * 0 if the password is not in the HIBP result. | ||
| */ | ||
| int pwnCount(const QString& password, const QString& hibpResult) | ||
| { | ||
| const auto hash = sha1Hex(password).toStdString(); | ||
| const auto result = hibpResult.toStdString(); | ||
| const auto pHash = hash.c_str(); | ||
| const auto pResult = result.c_str(); | ||
|
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| // The first 5 characters of the hash are in the URL. Search the | ||
| // rest in the HIBP result. | ||
| const auto p = strstr(pResult, pHash + 5); | ||
| if (p) { | ||
|
|
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| // Found: Return the number after the next colon | ||
| const auto colon = strchr(p, ':'); | ||
| return colon ? atoi(colon + 1) : 1; | ||
|
|
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| } else { | ||
|
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| // Not found | ||
| return 0; | ||
| } | ||
| } | ||
| } // namespace | ||
|
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| HibpDownloader::HibpDownloader(QString password, QObject* parent) | ||
| : QObject(parent) | ||
| , m_password(password) | ||
| { | ||
| // Set up timeout handling | ||
| m_timeout.setSingleShot(true); | ||
| connect(&m_timeout, SIGNAL(timeout()), SLOT(abort())); | ||
| const auto sec = config()->get("HibpDownloadTimeout", 10).toInt(); | ||
| m_timeout.start(sec * 1000); | ||
|
|
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| // The URL we query is https://api.pwnedpasswords.com/range/XXXXX, | ||
| // where XXXXX is the first five bytes of the hex representation of | ||
| // the password's SHA1. | ||
| const auto url = QString("https://api.pwnedpasswords.com/range/") + sha1Hex(m_password).left(5); | ||
|
|
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| // HIBP requires clients to specify a user agent in the request | ||
| // (https://haveibeenpwned.com/API/v3#UserAgent); however, in order | ||
| // to minimize the amount of information we expose about ourselves, | ||
| // we don't add the KeePassXC version number or platform. | ||
| auto request = QNetworkRequest(url); | ||
| request.setRawHeader("User-Agent", "KeePassXC"); | ||
|
|
||
| // Finally, submit the request to HIBP. | ||
| m_reply = getNetMgr()->get(request); | ||
| connect(m_reply, &QNetworkReply::finished, this, &HibpDownloader::fetchFinished); | ||
| connect(m_reply, &QIODevice::readyRead, this, &HibpDownloader::fetchReadyRead); | ||
| } | ||
|
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| HibpDownloader::~HibpDownloader() | ||
| { | ||
| abort(); | ||
| } | ||
|
|
||
| /* | ||
| * Abort the current online activity (if any). | ||
| */ | ||
| void HibpDownloader::abort() | ||
| { | ||
| if (m_reply) { | ||
| m_reply->abort(); | ||
| } | ||
| } | ||
|
|
||
| /* | ||
| * Called when new data has been loaded from the HIBP server. | ||
| */ | ||
| void HibpDownloader::fetchReadyRead() | ||
| { | ||
| m_bytesReceived += m_reply->readAll(); | ||
| } | ||
|
|
||
| /* | ||
| * Called after all data has been loaded from the HIBP server. | ||
| */ | ||
| void HibpDownloader::fetchFinished() | ||
| { | ||
| const auto ok = m_reply->error() == QNetworkReply::NoError; | ||
| const auto err = m_reply->errorString(); | ||
|
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| m_reply->deleteLater(); | ||
| m_reply = nullptr; | ||
| m_timeout.stop(); | ||
|
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| if (ok) { | ||
| emit finished(m_password, pwnCount(m_password, m_bytesReceived)); | ||
| } else { | ||
| auto msg = tr("Online password validation failed") + ":\n" + err; | ||
| if (!m_bytesReceived.isEmpty()) { | ||
| msg += "\n" + m_bytesReceived; | ||
| } | ||
| emit failed(m_password, msg); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* | ||
| * Copyright (C) 2020 KeePassXC Team <[email protected]> | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 2 or (at your option) | ||
| * version 3 of the License. | ||
| * | ||
| * 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. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| #ifndef KEEPASSXC_HIBPDOWNLOADER_H | ||
| #define KEEPASSXC_HIBPDOWNLOADER_H | ||
|
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| #include <QObject> | ||
| #include <QTimer> | ||
|
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| class QNetworkReply; | ||
|
|
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| /* | ||
| * Check if a password has been hacked by looking it up on the | ||
| * "Have I Been Pwned" website (https://haveibeenpwned.com/) | ||
| * in the background. | ||
| * | ||
| * Usage: Pass the password to check to the ctor and process | ||
| * the `finished` signal to get the result. Process the | ||
| * `failed` signal to handle errors. | ||
| */ | ||
| class HibpDownloader : public QObject | ||
| { | ||
| Q_OBJECT | ||
|
|
||
| public: | ||
| explicit HibpDownloader(QString password, QObject* parent = nullptr); | ||
| ~HibpDownloader() override; | ||
|
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| signals: | ||
| void finished(const QString& password, int count); | ||
| void failed(const QString& password, const QString& error); | ||
|
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| public slots: | ||
| void abort(); | ||
|
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| private slots: | ||
| void fetchFinished(); | ||
| void fetchReadyRead(); | ||
|
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| private: | ||
| const QString m_password; | ||
| QNetworkReply* m_reply = nullptr; | ||
| QTimer m_timeout; | ||
| QByteArray m_bytesReceived; | ||
| }; | ||
|
|
||
| #endif // KEEPASSXC_HIBPDOWNLOADER_H |
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