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/*
* KDFs defined in NIST SP 800-108
* (C) 2016 Kai Michaelis
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SP800_108_H__
#define BOTAN_SP800_108_H__
#include <botan/kdf.h>
#include <botan/mac.h>
namespace Botan {
/**
* NIST SP 800-108 KDF in Counter Mode (5.1)
*/
class BOTAN_DLL SP800_108_Counter : public KDF
{
public:
std::string name() const override { return "SP800-108-Counter(" + m_prf->name() + ")"; }
KDF* clone() const override { return new SP800_108_Counter(m_prf->clone()); }
/**
* Derive a key using the SP800-108 KDF in Counter mode.
*
* The implementation hard codes the length of [L]_2
* and [i]_2 (the value r) to 32 bits.
*
* @param key resulting keying material
* @param key_len the desired output length in bytes
* @param secret K_I
* @param secret_len size of K_I in bytes
* @param salt Context
* @param salt_len size of Context in bytes
* @param label Label
* @param label_len size of Label in bytes
*
* @throws Invalid_Argument key_len > 2^32
*/
size_t kdf(byte key[], size_t key_len,
const byte secret[], size_t secret_len,
const byte salt[], size_t salt_len,
const byte label[], size_t label_len) const override;
SP800_108_Counter(MessageAuthenticationCode* mac) : m_prf(mac) {}
static SP800_108_Counter* make(const Spec& spec);
private:
std::unique_ptr<MessageAuthenticationCode> m_prf;
};
/**
* NIST SP 800-108 KDF in Feedback Mode (5.2)
*/
class BOTAN_DLL SP800_108_Feedback : public KDF
{
public:
std::string name() const override { return "SP800-108-Feedback(" + m_prf->name() + ")"; }
KDF* clone() const override { return new SP800_108_Feedback(m_prf->clone()); }
/**
* Derive a key using the SP800-108 KDF in Feedback mode.
*
* The implementation uses the optional counter i and hard
* codes the length of [L]_2 and [i]_2 (the value r) to 32 bits.
*
* @param key resulting keying material
* @param key_len the desired output length in bytes
* @param secret K_I
* @param secret_len size of K_I in bytes
* @param salt IV || Context
* @param salt_len size of Context plus IV in bytes
* @param label Label
* @param label_len size of Label in bytes
*
* @throws Invalid_Argument key_len > 2^32
*/
size_t kdf(byte key[], size_t key_len,
const byte secret[], size_t secret_len,
const byte salt[], size_t salt_len,
const byte label[], size_t label_len) const override;
SP800_108_Feedback(MessageAuthenticationCode* mac) : m_prf(mac) {}
static SP800_108_Feedback* make(const Spec& spec);
private:
std::unique_ptr<MessageAuthenticationCode> m_prf;
};
/**
* NIST SP 800-108 KDF in Double Pipeline Mode (5.3)
*/
class BOTAN_DLL SP800_108_Pipeline : public KDF
{
public:
std::string name() const override { return "SP800-108-Pipeline(" + m_prf->name() + ")"; }
KDF* clone() const override { return new SP800_108_Pipeline(m_prf->clone()); }
/**
* Derive a key using the SP800-108 KDF in Double Pipeline mode.
*
* The implementation uses the optional counter i and hard
* codes the length of [L]_2 and [i]_2 (the value r) to 32 bits.
*
* @param key resulting keying material
* @param key_len the desired output length in bytes
* @param secret K_I
* @param secret_len size of K_I in bytes
* @param salt Context
* @param salt_len size of Context in bytes
* @param label Label
* @param label_len size of Label in bytes
*
* @throws Invalid_Argument key_len > 2^32
*/
size_t kdf(byte key[], size_t key_len,
const byte secret[], size_t secret_len,
const byte salt[], size_t salt_len,
const byte label[], size_t label_len) const override;
SP800_108_Pipeline(MessageAuthenticationCode* mac) : m_prf(mac) {}
static SP800_108_Pipeline* make(const Spec& spec);
private:
std::unique_ptr<MessageAuthenticationCode> m_prf;
};
}
#endif
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