Interface for crypto material. More...

#include <cryptlib.h>

Inheritance diagram for CryptoMaterial:

Classes
class	InvalidMaterial
	Exception thrown when invalid crypto material is detected. More...

Public Member Functions
virtual void	AssignFrom (const NameValuePairs &source)=0
	Assign values to this object. More...

virtual bool	Validate (RandomNumberGenerator &rng, unsigned int level) const =0
	Check this object for errors. More...

virtual void	ThrowIfInvalid (RandomNumberGenerator &rng, unsigned int level) const
	Check this object for errors. More...

virtual void	Save (BufferedTransformation &bt) const
	Saves a key to a BufferedTransformation. More...

virtual void	Load (BufferedTransformation &bt)
	Loads a key from a BufferedTransformation. More...

virtual bool	SupportsPrecomputation () const
	Determines whether the object supports precomputation. More...

virtual void	Precompute (unsigned int precomputationStorage)
	Perform precomputation. More...

virtual void	LoadPrecomputation (BufferedTransformation &storedPrecomputation)
	Retrieve previously saved precomputation. More...

virtual void	SavePrecomputation (BufferedTransformation &storedPrecomputation) const
	Save precomputation for later use. More...

void	DoQuickSanityCheck () const
	Perform a quick sanity check. More...

Public Member Functions inherited from NameValuePairs
template<class T >
bool	GetThisObject (T &object) const
	Get a copy of this object or subobject. More...

template<class T >
bool	GetThisPointer (T *&ptr) const
	Get a pointer to this object. More...

template<class T >
bool	GetValue (const char *name, T &value) const
	Get a named value. More...

template<class T >
T	GetValueWithDefault (const char *name, T defaultValue) const
	Get a named value. More...

CRYPTOPP_DLL std::string	GetValueNames () const
	Get a list of value names that can be retrieved. More...

CRYPTOPP_DLL bool	GetIntValue (const char *name, int &value) const
	Get a named value with type int. More...

CRYPTOPP_DLL int	GetIntValueWithDefault (const char *name, int defaultValue) const
	Get a named value with type int, with default. More...

CRYPTOPP_DLL bool	GetWord64Value (const char *name, word64 &value) const
	Get a named value with type word64. More...

CRYPTOPP_DLL word64	GetWord64ValueWithDefault (const char *name, word64 defaultValue) const
	Get a named value with type word64, with default. More...

template<class T >
void	GetRequiredParameter (const char className, const char name, T &value) const
	Retrieves a required name/value pair. More...

CRYPTOPP_DLL void	GetRequiredIntParameter (const char className, const char name, int &value) const
	Retrieves a required name/value pair. More...

virtual CRYPTOPP_DLL bool	GetVoidValue (const char name, const std::type_info &valueType, void pValue) const =0
	Get a named value. More...

Additional Inherited Members
Static Public Member Functions inherited from NameValuePairs
static CRYPTOPP_DLL void	ThrowIfTypeMismatch (const char *name, const std::type_info &stored, const std::type_info &retrieving)
	Ensures an expected name and type is present. More...

Detailed Description

Interface for crypto material.

CryptoMaterial() is an interface for crypto material, such as public keys, private keys and crypto parameters. Derived classes generally do not offer public methods such as GenerateRandom() and GenerateRandomWithKeySize().

See also: GeneratableCryptoMaterial()

Definition at line 2389 of file cryptlib.h.

Constructor & Destructor Documentation

◆ ~CryptoMaterial()

virtual CryptoMaterial::~CryptoMaterial ( )

inlinevirtual

Definition at line 2399 of file cryptlib.h.

Member Function Documentation

◆ AssignFrom()

virtual void CryptoMaterial::AssignFrom ( const NameValuePairs & source )

pure virtual

Assign values to this object.

This function can be used to create a public key from a private key.

Implemented in DL_GroupParameters_EC< EC >, DL_PrivateKey_ECGDSA< EC >, DL_PublicKey_ECGDSA< EC >, ESIGNFunction, InvertibleESIGNFunction, DL_GroupParameters_IntegerBased, DL_GroupParameters_IntegerBasedImpl< GROUP_PRECOMP, BASE_PRECOMP >, DL_GroupParameters_IntegerBasedImpl< ModExpPrecomputation >, DL_GroupParameters_IntegerBasedImpl< DL_GroupPrecomputation_LUC, DL_BasePrecomputation_LUC >, LUCFunction, InvertibleLUCFunction, DL_PrivateKeyImpl< GP >, DL_PrivateKeyImpl< DL_GroupParameters_EC< EC > >, DL_PublicKeyImpl< GP >, DL_PublicKeyImpl< DL_GroupParameters_EC< EC > >, RabinFunction, InvertibleRabinFunction, RSAFunction, InvertibleRSAFunction, RWFunction, InvertibleRWFunction, x25519, ed25519PrivateKey, ed25519PublicKey, and XTR_DH.

◆ Validate()

virtual bool CryptoMaterial::Validate	(	RandomNumberGenerator &	rng,
		unsigned int	level
	)		const

pure virtual

Check this object for errors.

Parameters

rng	a RandomNumberGenerator for objects which use randomized testing
level	the level of thoroughness

Returns: true if the tests succeed, false otherwise

There are four levels of thoroughness:

0 - using this object won't cause a crash or exception
1 - this object will probably function, and encrypt, sign, other operations correctly
2 - ensure this object will function correctly, and perform reasonable security checks
3 - perform reasonable security checks, and do checks that may take a long time

Level 0 does not require a RandomNumberGenerator. A NullRNG() can be used for level 0. Level 1 may not check for weak keys and such. Levels 2 and 3 are recommended.

See also: ThrowIfInvalid()

Implemented in ESIGNFunction, InvertibleESIGNFunction, LUCFunction, InvertibleLUCFunction, DL_GroupParameters< T >, DL_GroupParameters< typename GROUP_PRECOMP::Element >, DL_GroupParameters< Integer >, DL_PrivateKeyImpl< GP >, DL_PrivateKeyImpl< DL_GroupParameters_EC< EC > >, DL_PublicKeyImpl< GP >, DL_PublicKeyImpl< DL_GroupParameters_EC< EC > >, RabinFunction, InvertibleRabinFunction, RSAFunction, InvertibleRSAFunction, RWFunction, InvertibleRWFunction, x25519, ed25519PrivateKey, ed25519PublicKey, and XTR_DH.

◆ ThrowIfInvalid()

virtual void CryptoMaterial::ThrowIfInvalid	(	RandomNumberGenerator &	rng,
		unsigned int	level
	)		const

inlinevirtual

Check this object for errors.

Parameters

rng	a RandomNumberGenerator for objects which use randomized testing
level	the level of thoroughness

Exceptions

InvalidMaterial

Internally, ThrowIfInvalid() calls Validate() and throws InvalidMaterial() if validation fails.

See also: Validate()

Definition at line 2427 of file cryptlib.h.

◆ Save()

virtual void CryptoMaterial::Save ( BufferedTransformation & bt ) const

inlinevirtual

Saves a key to a BufferedTransformation.

Parameters

bt	the destination BufferedTransformation

Exceptions

NotImplemented

Save() writes the material to a BufferedTransformation.

If the material is a key, then the key is written with ASN.1 DER encoding. The key includes an object identifier with an algorithm id, like a subjectPublicKeyInfo.

A "raw" key without the "key info" can be saved using a key's DEREncode() method.

If a derived class does not override Save(), then the base class throws NotImplemented().

Reimplemented in ASN1CryptoMaterial< DL_GroupParameters< Integer > >, ASN1CryptoMaterial< PublicKey >, ASN1CryptoMaterial< PrivateKey >, InvertibleESIGNFunction, InvertibleRSAFunction, RWFunction, InvertibleRWFunction, x25519, ed25519PrivateKey, and ed25519PublicKey.

Definition at line 2439 of file cryptlib.h.

◆ Load()

virtual void CryptoMaterial::Load ( BufferedTransformation & bt )

inlinevirtual

Loads a key from a BufferedTransformation.

Parameters

bt	the source BufferedTransformation

Exceptions

KeyingErr

Load() attempts to read material from a BufferedTransformation. If the material is a key that was generated outside the library, then the following usually applies: