15 lines
758 B
C++
15 lines
758 B
C++
#pragma once
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//Derive a Short text Secret from a 256 bit random value and a sixty four bit integer
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std::array<char, 0x1b> DeriveTextSecret(const ristretto255::scalar& blob, uint_fast64_t i);
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//Derive a strong scalar secret from a string with password strengthening.
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//Net effect is convert one scalar into another by a process that is lengthy and costly.
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ristretto255::scalar DeriveStrongSecret(const char* const passwd);
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//Derive scalar secret from another quickly.
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ristretto255::scalar DeriveSecret(const ristretto255::scalar &sc, uint_fast64_t i);
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template <class T, std::enable_if_t<std::_Is_standard_unsigned_integer<T>, int> = 0>
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constexpr int rounded_log2(const T val) noexcept {
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return std::numeric_limits<T>::digits - std::countl_zero(val);
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}
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