MQV domain for performing authenticated key agreement. More...

#include <mqv.h>

Inheritance diagram for MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >:

Public Types
typedef GROUP_PARAMETERS	GroupParameters

typedef GroupParameters::Element	Element

typedef MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >	Domain

Public Member Functions
	MQV_Domain ()
	Construct a MQV domain.

	MQV_Domain (const GroupParameters &params)
	Construct a MQV domain.

	MQV_Domain (BufferedTransformation &bt)
	Construct a MQV domain.

template<class T1 , class T2 >
	MQV_Domain (T1 v1, T2 v2)
	Construct a MQV domain.

template<class T1 , class T2 , class T3 >
	MQV_Domain (T1 v1, T2 v2, T3 v3)
	Construct a MQV domain.

template<class T1 , class T2 , class T3 , class T4 >
	MQV_Domain (T1 v1, T2 v2, T3 v3, T4 v4)
	Construct a MQV domain.

const GroupParameters &	GetGroupParameters () const
	Retrieves the group parameters for this domain.

GroupParameters &	AccessGroupParameters ()
	Retrieves the group parameters for this domain.

CryptoParameters &	AccessCryptoParameters ()
	Retrieves the crypto parameters for this domain.

unsigned int	AgreedValueLength () const
	Provides the size of the agreed value.

unsigned int	StaticPrivateKeyLength () const
	Provides the size of the static private key.

unsigned int	StaticPublicKeyLength () const
	Provides the size of the static public key.

void	GenerateStaticPrivateKey (RandomNumberGenerator &rng, byte *privateKey) const
	Generate static private key in this domain.

void	GenerateStaticPublicKey (RandomNumberGenerator &rng, const byte privateKey, byte publicKey) const
	Generate a static public key from a private key in this domain.

unsigned int	EphemeralPrivateKeyLength () const
	Provides the size of the ephemeral private key.

unsigned int	EphemeralPublicKeyLength () const
	Provides the size of the ephemeral public key.

void	GenerateEphemeralPrivateKey (RandomNumberGenerator &rng, byte *privateKey) const
	Generate ephemeral private key in this domain.

void	GenerateEphemeralPublicKey (RandomNumberGenerator &rng, const byte privateKey, byte publicKey) const
	Generate ephemeral public key from a private key in this domain.

bool	Agree (byte agreedValue, const byte staticPrivateKey, const byte ephemeralPrivateKey, const byte staticOtherPublicKey, const byte *ephemeralOtherPublicKey, bool validateStaticOtherPublicKey=true) const
	Derive agreed value or shared secret.

Public Member Functions inherited from AuthenticatedKeyAgreementDomain
virtual void	GenerateStaticKeyPair (RandomNumberGenerator &rng, byte privateKey, byte publicKey) const
	Generate a static private/public key pair.

virtual void	GenerateEphemeralKeyPair (RandomNumberGenerator &rng, byte privateKey, byte publicKey) const
	Generate private/public key pair.

Public Member Functions inherited from KeyAgreementAlgorithm
CryptoMaterial &	AccessMaterial ()
	Retrieves a reference to Crypto Parameters.

const CryptoMaterial &	GetMaterial () const
	Retrieves a reference to Crypto Parameters.

virtual const CryptoParameters &	GetCryptoParameters () const
	Retrieves a reference to Crypto Parameters.

Public Member Functions inherited from Algorithm
	Algorithm (bool checkSelfTestStatus=true)
	Interface for all crypto algorithms.

virtual std::string	AlgorithmName () const
	Provides the name of this algorithm.

virtual std::string	AlgorithmProvider () const
	Retrieve the provider of this algorithm.

Public Member Functions inherited from Clonable
virtual Clonable *	Clone () const
	Copies this object.

Detailed Description

template<class GROUP_PARAMETERS, class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>
class MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >

MQV domain for performing authenticated key agreement.

Template Parameters

GROUP_PARAMETERS	doamin parameters
COFACTOR_OPTION	cofactor option

GROUP_PARAMETERS parameters include the curve coefcients and the base point. Binary curves use a polynomial to represent its characteristic, while prime curves use a prime number.

See also: MQV, HMQV, FHMQV, and AuthenticatedKeyAgreementDomain

Since: Crypto++ 3.0

Definition at line 28 of file mqv.h.

Member Typedef Documentation

◆ GroupParameters

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

typedef GROUP_PARAMETERS MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::GroupParameters

Definition at line 31 of file mqv.h.

◆ Element

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

typedef GroupParameters::Element MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::Element

Definition at line 32 of file mqv.h.

◆ Domain

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

typedef MQV_Domain<GROUP_PARAMETERS, COFACTOR_OPTION> MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::Domain

Definition at line 33 of file mqv.h.

Constructor & Destructor Documentation

◆ MQV_Domain() [1/6]

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::MQV_Domain ( )

inline

Construct a MQV domain.

Definition at line 36 of file mqv.h.

◆ MQV_Domain() [2/6]

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::MQV_Domain ( const GroupParameters & params )

inline

Construct a MQV domain.

Parameters

params group parameters and options

Definition at line 40 of file mqv.h.

◆ MQV_Domain() [3/6]

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::MQV_Domain ( BufferedTransformation & bt )

inline

Construct a MQV domain.

Parameters

bt	BufferedTransformation with group parameters and options

Definition at line 45 of file mqv.h.

◆ MQV_Domain() [4/6]

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

template<class T1 , class T2 >

MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::MQV_Domain	(	T1	v1,
		T2	v2
	)

inline

Construct a MQV domain.

Template Parameters

T1	template parameter used as a constructor parameter
T2	template parameter used as a constructor parameter

Parameters

v1	first parameter
v2	second parameter

v1 and v2 are passed directly to the GROUP_PARAMETERS object.

Definition at line 55 of file mqv.h.

◆ MQV_Domain() [5/6]

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

template<class T1 , class T2 , class T3 >

MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::MQV_Domain	(	T1	v1,
		T2	v2,
		T3	v3
	)

inline

Construct a MQV domain.

Template Parameters

T1	template parameter used as a constructor parameter
T2	template parameter used as a constructor parameter
T3	template parameter used as a constructor parameter

Parameters

v1	first parameter
v2	second parameter
v3	third parameter

v1, v2 and v3 are passed directly to the GROUP_PARAMETERS object.

Definition at line 67 of file mqv.h.

◆ MQV_Domain() [6/6]

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

template<class T1 , class T2 , class T3 , class T4 >

MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::MQV_Domain	(	T1	v1,
		T2	v2,
		T3	v3,
		T4	v4
	)

inline

Construct a MQV domain.

Template Parameters

T1	template parameter used as a constructor parameter
T2	template parameter used as a constructor parameter
T3	template parameter used as a constructor parameter
T4	template parameter used as a constructor parameter

Parameters

v1	first parameter
v2	second parameter
v3	third parameter
v4	third parameter

v1, v2, v3 and v4 are passed directly to the GROUP_PARAMETERS object.

Definition at line 81 of file mqv.h.

Member Function Documentation

◆ GetGroupParameters()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

const GroupParameters & MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::GetGroupParameters ( ) const

inline

Retrieves the group parameters for this domain.

Returns: the group parameters for this domain as a const reference

Definition at line 86 of file mqv.h.

◆ AccessGroupParameters()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

GroupParameters & MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::AccessGroupParameters ( )

inline

Retrieves the group parameters for this domain.

Returns: the group parameters for this domain as a non-const reference

Definition at line 90 of file mqv.h.

◆ AccessCryptoParameters()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

CryptoParameters & MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::AccessCryptoParameters ( )

inlinevirtual

Retrieves the crypto parameters for this domain.

Returns: the crypto parameters for this domain as a non-const reference

Implements KeyAgreementAlgorithm.

Definition at line 94 of file mqv.h.

◆ AgreedValueLength()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

unsigned int MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::AgreedValueLength ( ) const

inlinevirtual

Provides the size of the agreed value.

Returns: size of agreed value produced in this domain

The length is calculated using GetEncodedElementSize(false), which means the element is encoded in a non-reversible format. A non-reversible format means its a raw byte array, and it lacks presentation format like an ASN.1 BIT_STRING or OCTET_STRING.

Implements AuthenticatedKeyAgreementDomain.

Definition at line 102 of file mqv.h.

◆ StaticPrivateKeyLength()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

unsigned int MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::StaticPrivateKeyLength ( ) const

inlinevirtual

Provides the size of the static private key.

Returns: size of static private keys in this domain

The length is calculated using the byte count of the subgroup order.

Implements AuthenticatedKeyAgreementDomain.

Definition at line 107 of file mqv.h.

◆ StaticPublicKeyLength()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

unsigned int MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::StaticPublicKeyLength ( ) const

inlinevirtual

Provides the size of the static public key.

Returns: size of static public keys in this domain

The length is calculated using GetEncodedElementSize(true), which means the element is encoded in a reversible format. A reversible format means it has a presentation format, and its an ANS.1 encoded element or point.

Implements AuthenticatedKeyAgreementDomain.

Definition at line 115 of file mqv.h.

◆ GenerateStaticPrivateKey()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

void MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::GenerateStaticPrivateKey	(	RandomNumberGenerator &	rng,
		byte *	privateKey
	)		const

inlinevirtual

Generate static private key in this domain.

Parameters

rng	a RandomNumberGenerator derived class
privateKey	a byte buffer for the generated private key in this domain

The private key is a random scalar used as an exponent in the range [1,MaxExponent()].

Precondition: COUNTOF(privateKey) == PrivateStaticKeyLength()

Implements AuthenticatedKeyAgreementDomain.

Definition at line 123 of file mqv.h.

◆ GenerateStaticPublicKey()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

void MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::GenerateStaticPublicKey	(	RandomNumberGenerator &	rng,
		const byte *	privateKey,
		byte *	publicKey
	)		const

inlinevirtual

Generate a static public key from a private key in this domain.

Parameters

rng	a RandomNumberGenerator derived class
privateKey	a byte buffer with the previously generated private key
publicKey	a byte buffer for the generated public key in this domain

The public key is an element or point on the curve, and its stored in a revrsible format. A reversible format means it has a presentation format, and its an ANS.1 encoded element or point.

Precondition: COUNTOF(publicKey) == PublicStaticKeyLength()

Implements AuthenticatedKeyAgreementDomain.

Definition at line 137 of file mqv.h.

◆ EphemeralPrivateKeyLength()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

unsigned int MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::EphemeralPrivateKeyLength ( ) const

inlinevirtual

Provides the size of the ephemeral private key.

Returns: size of ephemeral private keys in this domain

An ephemeral private key is a private key and public key. The serialized size is different than a static private key.

Implements AuthenticatedKeyAgreementDomain.

Definition at line 150 of file mqv.h.

◆ EphemeralPublicKeyLength()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

unsigned int MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::EphemeralPublicKeyLength ( ) const

inlinevirtual

Provides the size of the ephemeral public key.

Returns: size of ephemeral public keys in this domain

An ephemeral public key is a public key. The serialized size is the same as a static public key.

Implements AuthenticatedKeyAgreementDomain.

Definition at line 156 of file mqv.h.

◆ GenerateEphemeralPrivateKey()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

void MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::GenerateEphemeralPrivateKey	(	RandomNumberGenerator &	rng,
		byte *	privateKey
	)		const

inlinevirtual

Generate ephemeral private key in this domain.

Parameters

rng	a RandomNumberGenerator derived class
privateKey	a byte buffer for the generated private key in this domain

Precondition: COUNTOF(privateKey) == EphemeralPrivateKeyLength()

Implements AuthenticatedKeyAgreementDomain.

Definition at line 162 of file mqv.h.

◆ GenerateEphemeralPublicKey()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

void MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::GenerateEphemeralPublicKey	(	RandomNumberGenerator &	rng,
		const byte *	privateKey,
		byte *	publicKey
	)		const

inlinevirtual

Generate ephemeral public key from a private key in this domain.

Parameters

rng	a RandomNumberGenerator derived class
privateKey	a byte buffer with the previously generated private key
publicKey	a byte buffer for the generated public key in this domain

Precondition: COUNTOF(publicKey) == EphemeralPublicKeyLength()

Implements AuthenticatedKeyAgreementDomain.

Definition at line 176 of file mqv.h.

◆ Agree()

template<class GROUP_PARAMETERS , class COFACTOR_OPTION = typename GROUP_PARAMETERS::DefaultCofactorOption>

bool MQV_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >::Agree	(	byte *	agreedValue,
		const byte *	staticPrivateKey,
		const byte *	ephemeralPrivateKey,
		const byte *	staticOtherPublicKey,
		const byte *	ephemeralOtherPublicKey,
		bool	validateStaticOtherPublicKey = `true`
	)		const

inlinevirtual

Derive agreed value or shared secret.

Parameters

agreedValue	the shared secret
staticPrivateKey	your long term private key
ephemeralPrivateKey	your ephemeral private key
staticOtherPublicKey	couterparty's long term public key
ephemeralOtherPublicKey	couterparty's ephemeral public key
validateStaticOtherPublicKey	flag indicating validation

Returns: true upon success, false in case of failure

Agree() performs the authenticated key agreement. Agree() derives a shared secret from your private keys and couterparty's public keys. Each instance or run of the protocol should use a new ephemeral key pair.

The other's ephemeral public key will always be validated at Level 1 to ensure it is a point on the curve. validateStaticOtherPublicKey determines how thoroughly other's static public key is validated. If you have previously validated the couterparty's static public key, then use validateStaticOtherPublicKey=false to save time.

Precondition: COUNTOF(agreedValue) == AgreedValueLength(); COUNTOF(staticPrivateKey) == StaticPrivateKeyLength(); COUNTOF(ephemeralPrivateKey) == EphemeralPrivateKeyLength(); COUNTOF(staticOtherPublicKey) == StaticPublicKeyLength(); COUNTOF(ephemeralOtherPublicKey) == EphemeralPublicKeyLength()

Implements AuthenticatedKeyAgreementDomain.

Definition at line 205 of file mqv.h.

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

mqv.h

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

◆ GroupParameters

◆ Element

◆ Domain

Constructor & Destructor Documentation

◆ MQV_Domain() [1/6]

◆ MQV_Domain() [2/6]

◆ MQV_Domain() [3/6]

◆ MQV_Domain() [4/6]

◆ MQV_Domain() [5/6]

◆ MQV_Domain() [6/6]

Member Function Documentation

◆ GetGroupParameters()

◆ AccessGroupParameters()

◆ AccessCryptoParameters()

◆ AgreedValueLength()

◆ StaticPrivateKeyLength()

◆ StaticPublicKeyLength()

◆ GenerateStaticPrivateKey()

◆ GenerateStaticPublicKey()

◆ EphemeralPrivateKeyLength()

◆ EphemeralPublicKeyLength()

◆ GenerateEphemeralPrivateKey()

◆ GenerateEphemeralPublicKey()

◆ Agree()