QCA::HKDF Class Reference

#include <QtCrypto>

Collaboration diagram for QCA::HKDF:

Public Member Functions
	HKDF (const HKDF &from)
	HKDF (const QString &algorithm=QStringLiteral("sha256"), const QString &provider=QString())
SymmetricKey	makeKey (const SecureArray &secret, const InitializationVector &salt, const InitializationVector &info, unsigned int keyLength)
HKDF &	operator= (const HKDF &from)
Public Member Functions inherited from QCA::Algorithm
	Algorithm (const Algorithm &from)
void	change (const QString &type, const QString &provider)
void	change (Provider::Context *c)
Provider::Context *	context ()
const Provider::Context *	context () const
Algorithm &	operator= (const Algorithm &from)
Provider *	provider () const
Provider::Context *	takeContext ()
QString	type () const

Additional Inherited Members
Protected Member Functions inherited from QCA::Algorithm
	Algorithm ()
	Algorithm (const QString &type, const QString &provider)

Detailed Description

Since

2.3

HMAC-based extract-and-expand key derivation function

This class implements HMAC-based Extract-and-Expand Key Derivation Function, as specified in RFC5869.

Constructor & Destructor Documentation

HKDF() [1/2]

QCA::HKDF::HKDF ( const QString &  algorithm = QStringLiteral("sha256"), const QString &  provider = QString()  )

explicit

Standard constructor.

Parameters

algorithm	the name of the hashing algorithm to use
provider	the name of the provider to use, if available

HKDF() [2/2]

QCA::HKDF::HKDF

(

const HKDF &

from

)

Standard copy constructor.

Parameters

from	the KeyDerivationFunction to copy from

Member Function Documentation

operator=()

HKDF & QCA::HKDF::operator=

(

const HKDF &

from

)

Assignment operator.

Copies the state (including key) from one HKDF to another

Parameters

from	the HKDF to assign from

makeKey()

SymmetricKey QCA::HKDF::makeKey	(	const SecureArray &	secret,
		const InitializationVector &	salt,
		const InitializationVector &	info,
		unsigned int	keyLength
	)

Generate the key from a specified secret, salt value, and an additional info.

Note

key length is ignored for some functions

Parameters

secret	the secret (password or passphrase)
salt	the salt to use
info	the info to use
keyLength	the length of key to return

Returns

the derived key

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The documentation for this class was generated from the following file:

• qca_basic.h