Botan
2.19.3
Crypto and TLS for C&
src
lib
kdf
sp800_56c
sp800_56c.h
Go to the documentation of this file.
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/*
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* KDF defined in NIST SP 800-56c
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* (C) 2016 Kai Michaelis
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*
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* Botan is released under the Simplified BSD License (see license.txt)
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*/
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#ifndef BOTAN_SP800_56C_H_
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#define BOTAN_SP800_56C_H_
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#include <botan/kdf.h>
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#include <botan/mac.h>
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BOTAN_FUTURE_INTERNAL_HEADER
(sp800_56c.h)
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namespace
Botan
{
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/**
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* NIST SP 800-56C KDF
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*/
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class
BOTAN_PUBLIC_API
(2,0)
SP800_56C
final
:
public
KDF
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{
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public
:
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std::string
name
()
const override
{
return
"SP800-56C("
+ m_prf->name() +
")"
; }
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KDF
*
clone
()
const override
{
return
new
SP800_56C
(m_prf->clone(), m_exp->clone()); }
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/**
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* Derive a key using the SP800-56C KDF.
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*
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* The implementation hard codes the context value for the
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* expansion step to the empty string.
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*
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* @param key derived keying material K_M
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* @param key_len the desired output length in bytes
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* @param secret shared secret Z
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* @param secret_len size of Z in bytes
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* @param salt salt s of the extraction step
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* @param salt_len size of s in bytes
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* @param label label for the expansion step
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* @param label_len size of label in bytes
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*
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* @throws Invalid_Argument key_len > 2^32
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*/
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size_t
kdf
(uint8_t key[],
size_t
key_len,
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const
uint8_t secret[],
size_t
secret_len,
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const
uint8_t salt[],
size_t
salt_len
,
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const
uint8_t label[],
size_t
label_len)
const override
;
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/**
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* @param mac MAC algorithm used for randomness extraction
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* @param exp KDF used for key expansion
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*/
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SP800_56C
(
MessageAuthenticationCode
* mac,
KDF
* exp) : m_prf(mac), m_exp(exp) {}
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private
:
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std::unique_ptr<MessageAuthenticationCode> m_prf;
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std::unique_ptr<KDF> m_exp;
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};
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}
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#endif
Botan::KDF
Definition
kdf.h:21
Botan::KDF::kdf
virtual size_t kdf(uint8_t key[], size_t key_len, const uint8_t secret[], size_t secret_len, const uint8_t salt[], size_t salt_len, const uint8_t label[], size_t label_len) const =0
Botan::MessageAuthenticationCode
Definition
mac.h:23
Botan::SP800_56C
Definition
sp800_56c.h:22
Botan::SP800_56C::clone
KDF * clone() const override
Definition
sp800_56c.h:26
Botan::SP800_56C::SP800_56C
SP800_56C(MessageAuthenticationCode *mac, KDF *exp)
Definition
sp800_56c.h:54
Botan::SP800_56C::name
std::string name() const override
Definition
sp800_56c.h:24
final
int(* final)(unsigned char *, CTX *)
Definition
commoncrypto_hash.cpp:29
BOTAN_PUBLIC_API
#define BOTAN_PUBLIC_API(maj, min)
Definition
compiler.h:31
BOTAN_FUTURE_INTERNAL_HEADER
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition
compiler.h:136
Botan
Definition
alg_id.cpp:13
salt_len
size_t salt_len
Definition
x509_obj.cpp:25
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