e40f10657d
* Pass correct entropy amount to keepassxc-browser instead of amount of bits for both password and passphrase. * Rename json key from "login" to "entropy" (keeping "login" key for backwards compatibility). * Also make some changes to entropy calculation methods: - Rename PassphraseGenerator::calculateEntropy to estimateEntropy - Rename PasswordGenerator::calculateEntropy to estimateEntropy
134 lines
3.3 KiB
C++
134 lines
3.3 KiB
C++
/*
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* Copyright (C) 2017 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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#include "PassphraseGenerator.h"
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#include <QFile>
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#include <QTextStream>
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#include <cmath>
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#include "core/FilePath.h"
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#include "crypto/Random.h"
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const char* PassphraseGenerator::DefaultSeparator = " ";
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const char* PassphraseGenerator::DefaultWordList = "eff_large.wordlist";
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PassphraseGenerator::PassphraseGenerator()
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: m_wordCount(DefaultWordCount)
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, m_wordCase(LOWERCASE)
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, m_separator(DefaultSeparator)
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{
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setDefaultWordList();
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}
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double PassphraseGenerator::estimateEntropy(int wordCount)
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{
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if (m_wordlist.isEmpty()) {
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return 0.0;
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}
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if (wordCount < 1) {
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wordCount = m_wordCount;
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}
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return std::log2(m_wordlist.size()) * wordCount;
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}
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void PassphraseGenerator::setWordCount(int wordCount)
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{
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m_wordCount = qMax(1, wordCount);
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}
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void PassphraseGenerator::setWordCase(PassphraseWordCase wordCase)
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{
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m_wordCase = wordCase;
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}
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void PassphraseGenerator::setWordList(const QString& path)
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{
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m_wordlist.clear();
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QFile file(path);
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if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
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qWarning("Couldn't load passphrase wordlist.");
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return;
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}
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QTextStream in(&file);
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while (!in.atEnd()) {
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m_wordlist.append(in.readLine());
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}
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if (m_wordlist.size() < 4000) {
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qWarning("Wordlist too short!");
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return;
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}
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}
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void PassphraseGenerator::setDefaultWordList()
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{
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const QString path = filePath()->wordlistPath(PassphraseGenerator::DefaultWordList);
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setWordList(path);
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}
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void PassphraseGenerator::setWordSeparator(const QString& separator)
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{
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m_separator = separator;
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}
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QString PassphraseGenerator::generatePassphrase() const
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{
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QString tmpWord;
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Q_ASSERT(isValid());
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// In case there was an error loading the wordlist
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if (m_wordlist.length() == 0) {
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return QString();
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}
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QStringList words;
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for (int i = 0; i < m_wordCount; ++i) {
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int wordIndex = randomGen()->randomUInt(static_cast<quint32>(m_wordlist.length()));
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tmpWord = m_wordlist.at(wordIndex);
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// convert case
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switch (m_wordCase) {
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case UPPERCASE:
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tmpWord = tmpWord.toUpper();
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break;
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case TITLECASE:
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tmpWord = tmpWord.replace(0, 1, tmpWord.left(1).toUpper());
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break;
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case LOWERCASE:
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default:
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tmpWord = tmpWord.toLower();
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break;
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}
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words.append(tmpWord);
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}
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return words.join(m_separator);
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}
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bool PassphraseGenerator::isValid() const
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{
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if (m_wordCount == 0) {
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return false;
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}
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return m_wordlist.size() >= 1000;
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}
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