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/*
* PBKDF2
* (C) 1999-2007,2012 Jack Lloyd
* (C) 2018 Ribose Inc
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_PBKDF2_H_
#define BOTAN_PBKDF2_H_
#include <botan/pbkdf.h>
#include <botan/pwdhash.h>
#include <botan/mac.h>
namespace Botan {
BOTAN_PUBLIC_API(2,0) size_t pbkdf2(MessageAuthenticationCode& prf,
uint8_t out[],
size_t out_len,
const std::string& passphrase,
const uint8_t salt[], size_t salt_len,
size_t iterations,
std::chrono::milliseconds msec);
/**
* Perform PBKDF2. The prf is assumed to be keyed already.
*/
BOTAN_PUBLIC_API(2,8) void pbkdf2(MessageAuthenticationCode& prf,
uint8_t out[], size_t out_len,
const uint8_t salt[], size_t salt_len,
size_t iterations);
/**
* PBKDF2
*/
class BOTAN_PUBLIC_API(2,8) PBKDF2 final : public PasswordHash
{
public:
PBKDF2(const MessageAuthenticationCode& prf, size_t iter) :
m_prf(prf.clone()),
m_iterations(iter)
{}
PBKDF2(const MessageAuthenticationCode& prf, size_t olen, std::chrono::milliseconds msec);
size_t iterations() const override { return m_iterations; }
std::string to_string() const override;
void derive_key(uint8_t out[], size_t out_len,
const char* password, size_t password_len,
const uint8_t salt[], size_t salt_len) const override;
private:
std::unique_ptr<MessageAuthenticationCode> m_prf;
size_t m_iterations;
};
/**
* Family of PKCS #5 PBKDF2 operations
*/
class BOTAN_PUBLIC_API(2,8) PBKDF2_Family final : public PasswordHashFamily
{
public:
PBKDF2_Family(MessageAuthenticationCode* prf) : m_prf(prf) {}
std::string name() const override;
std::unique_ptr<PasswordHash> tune(size_t output_len,
std::chrono::milliseconds msec,
size_t max_memory) const override;
/**
* Return some default parameter set for this PBKDF that should be good
* enough for most users. The value returned may change over time as
* processing power and attacks improve.
*/
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 iter, size_t, size_t) const override;
private:
std::unique_ptr<MessageAuthenticationCode> m_prf;
};
/**
* PKCS #5 PBKDF2 (old interface)
*/
class BOTAN_PUBLIC_API(2,0) PKCS5_PBKDF2 final : public PBKDF
{
public:
std::string name() const override;
PBKDF* clone() const override;
size_t pbkdf(uint8_t output_buf[], size_t output_len,
const std::string& passphrase,
const uint8_t salt[], size_t salt_len,
size_t iterations,
std::chrono::milliseconds msec) const override;
/**
* Create a PKCS #5 instance using the specified message auth code
* @param mac_fn the MAC object to use as PRF
*/
explicit PKCS5_PBKDF2(MessageAuthenticationCode* mac_fn) : m_mac(mac_fn) {}
private:
std::unique_ptr<MessageAuthenticationCode> m_mac;
};
}
#endif
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