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/*
* KDF defined in NIST SP 800-56c
* (C) 2016 Kai Michaelis
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SP800_56C_H__
#define BOTAN_SP800_56C_H__
#include <botan/kdf.h>
#include <botan/mac.h>
namespace Botan {
/**
* NIST SP 800-56C KDF
*/
class BOTAN_DLL SP800_56C : public KDF
{
public:
std::string name() const override { return "SP800-56C(" + m_prf->name() + ")"; }
KDF* clone() const override { return new SP800_56C(m_prf->clone(), m_exp->clone()); }
size_t kdf(byte key[], size_t key_len,
const byte secret[], size_t secret_len,
const byte salt[], size_t salt_len) const override;
SP800_56C(MessageAuthenticationCode* mac, KDF* exp) : m_prf(mac), m_exp(exp) {}
static SP800_56C* make(const Spec& spec);
private:
std::unique_ptr<MessageAuthenticationCode> m_prf;
std::unique_ptr<KDF> m_exp;
};
}
#endif
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