59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
// 2022 (c) GPLv3, acetone at i2pmail.org
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// Zero Storage Captcha
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#ifndef ZEROSTORAGECAPTCHACRYPTO_H
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#define ZEROSTORAGECAPTCHACRYPTO_H
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#include <QString>
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#include <QTimer>
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#include <openssl/evp.h>
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constexpr int KEYSIZE = 32;
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constexpr int SIGSIZE = 64;
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namespace ZeroStorageCaptchaCrypto {
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QString hash(const QString& str);
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QByteArray random(int length);
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/////////
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class TimeToken
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{
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public:
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TimeToken() = delete;
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static void init();
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static bool inited() { return m_updater; }
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static const QString currentToken() { return m_current; }
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static const QString prevToken() { return m_prev; }
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private:
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static QTimer* m_updater;
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static QString m_current;
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static QString m_prev;
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};
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/////////
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class KeyHolder
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{
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public:
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KeyHolder() = delete;
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static QString captchaSecretLine(const QString& captchaAnswer, bool prevTimeToken = false);
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static bool validateCaptchaAnswer(const QString& answer, const QString& secretLine);
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static void setCaseSensitive(bool enabled = false) { m_caseSensitive = enabled; }
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private:
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static QString compact(const QString& str);
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static void sign(const uint8_t * buf, int len, uint8_t * signature, const uint8_t * privateKey);
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static bool m_caseSensitive;
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static uint8_t m_key[KEYSIZE];
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};
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} // namespace
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#endif // ZEROSTORAGECAPTCHACRYPTO_H
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