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/*
* (C) 2018,2019 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_PBKDF_BCRYPT_H_
#define BOTAN_PBKDF_BCRYPT_H_
#include <botan/pwdhash.h>
namespace Botan {
/**
* Bcrypt-PBKDF key derivation function
*/
class BOTAN_PUBLIC_API(2,11) Bcrypt_PBKDF final : public PasswordHash
{
public:
Bcrypt_PBKDF(size_t iterations) : m_iterations(iterations) {}
Bcrypt_PBKDF(const Bcrypt_PBKDF& other) = default;
Bcrypt_PBKDF& operator=(const Bcrypt_PBKDF&) = default;
/**
* Derive a new key under the current Bcrypt-PBKDF parameter set
*/
void derive_key(uint8_t out[], size_t out_len,
const char* password, const size_t password_len,
const uint8_t salt[], size_t salt_len) const override;
std::string to_string() const override;
size_t iterations() const override { return m_iterations; }
size_t parallelism() const override { return 0; }
size_t memory_param() const override { return 0; }
size_t total_memory_usage() const override { return 4096; }
private:
size_t m_iterations;
};
class BOTAN_PUBLIC_API(2,11) Bcrypt_PBKDF_Family final : public PasswordHashFamily
{
public:
Bcrypt_PBKDF_Family() {}
std::string name() const override;
std::unique_ptr<PasswordHash> tune(size_t output_length,
std::chrono::milliseconds msec,
size_t max_memory) const override;
std::unique_ptr<PasswordHash> default_params() const override;
std::unique_ptr<PasswordHash> from_iterations(size_t iter) const override;
std::unique_ptr<PasswordHash> from_params(
size_t i, size_t, size_t) const override;
};
/**
* Bcrypt PBKDF compatible with OpenBSD bcrypt_pbkdf
*/
void BOTAN_UNSTABLE_API bcrypt_pbkdf(uint8_t output[], size_t output_len,
const char* pass, size_t pass_len,
const uint8_t salt[], size_t salt_len,
size_t rounds);
}
#endif
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