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/**
* (C) 2018 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SCRYPT_H_
#define BOTAN_SCRYPT_H_
#include <botan/types.h>
#include <chrono>
#include <string>
namespace Botan {
class Scrypt_Params
{
public:
Scrypt_Params(size_t N, size_t r, size_t p);
Scrypt_Params(std::chrono::milliseconds msec);
Scrypt_Params(size_t iterations);
size_t N() const { return m_N; }
size_t r() const { return m_r; }
size_t p() const { return m_p; }
private:
size_t m_N, m_r, m_p;
};
/**
* Scrypt key derivation function (RFC 7914)
*
* @param output the output will be placed here
* @param output_len length of output
* @param password the user password
* @param salt the salt
* @param salt_len length of salt
* @param N the CPU/Memory cost parameter, must be power of 2
* @param r the block size parameter
* @param p the parallelization parameter
*
* Suitable parameters for most uses would be N = 16384, r = 8, p = 1
*
* Scrypt uses approximately (p + N + 1) * 128 * r bytes of memory
*/
void BOTAN_UNSTABLE_API scrypt(uint8_t output[], size_t output_len,
const std::string& password,
const uint8_t salt[], size_t salt_len,
size_t N, size_t r, size_t p);
void BOTAN_UNSTABLE_API scrypt(uint8_t output[], size_t output_len,
const std::string& password,
const uint8_t salt[], size_t salt_len,
const Scrypt_Params& params);
}
#endif
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