46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
/* === This file is part of Calamares - <https://calamares.io> ===
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*
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* SPDX-FileCopyrightText: 2019-2020 Adriaan de Groot <groot@kde.org>
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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*
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* Calamares is Free Software: see the License-Identifier above.
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*
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*
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*/
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#ifndef UTILS_ENTROPY_H
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#define UTILS_ENTROPY_H
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#include "DllMacro.h"
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#include <QByteArray>
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namespace Calamares
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{
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/// @brief Which entropy source was actually used for the entropy.
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enum class EntropySource
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{
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None, ///< Buffer is empty, no random data
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URandom, ///< Read from /dev/urandom
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Twister ///< Generated by pseudo-random
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};
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/** @brief Fill buffer @p b with exactly @p size random bytes
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*
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* The array is cleared and resized, then filled with 0xcb
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* "just in case", after which it is filled with random
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* bytes from a suitable source. Returns which source was used.
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*/
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DLLEXPORT EntropySource getEntropy( int size, QByteArray& b );
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/** @brief Fill string @p s with exactly @p size random printable ASCII characters
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*
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* The characters are picked from a set of 64 (2^6). The string
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* contains 6 * size bits of entropy. * Returns which source was used.
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* @see getEntropy
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*/
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DLLEXPORT EntropySource getPrintableEntropy( int size, QString& s );
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} // namespace Calamares
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#endif
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