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https://github.com/keepassxreboot/keepassxc.git
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13eb1c0bbd
To reduce residual fragments of secret data in memory after deallocation, this patch replaces the global delete operator with a version that zeros out previously allocated memory. It makes use of the new C++14 sized deallocation, but provides an unsized fallback with platform-specific size deductions. This change is only a minor mitigation and cannot protect against buffer reallocations by the operating system or non-C++ libraries. Thus, we still cannot guarantee all memory to be wiped after free. As a further improvement, this patch uses libgcrypt and libsodium to write long-lived master key component hashes into a secure memory area and wipe it afterwards. The patch also fixes compiler flags not being set properly on macOS.
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
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* Copyright (C) 2019 KeePassXC Team <team@keepassxc.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 or (at your option)
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* version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef KEEPASSX_YK_CHALLENGERESPONSEKEY_H
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#define KEEPASSX_YK_CHALLENGERESPONSEKEY_H
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#include "core/Global.h"
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#include "keys/ChallengeResponseKey.h"
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#include "keys/drivers/YubiKey.h"
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#include <QObject>
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class YkChallengeResponseKey : public QObject, public ChallengeResponseKey
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{
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Q_OBJECT
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public:
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static QUuid UUID;
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explicit YkChallengeResponseKey(int slot = -1, bool blocking = false);
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~YkChallengeResponseKey() override;
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QByteArray rawKey() const override;
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bool challenge(const QByteArray& challenge) override;
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bool challenge(const QByteArray& challenge, unsigned int retries);
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QString getName() const;
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bool isBlocking() const;
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signals:
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/**
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* Emitted whenever user interaction is required to proceed with the challenge-response protocol.
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* You can use this to show a helpful dialog informing the user that his assistance is required.
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*/
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void userInteractionRequired();
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/**
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* Emitted when the user has provided their required input.
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*/
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void userConfirmed();
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private:
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char* m_key = nullptr;
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std::size_t m_keySize = 0;
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int m_slot;
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bool m_blocking;
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};
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#endif // KEEPASSX_YK_CHALLENGERESPONSEKEY_H
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