Interface for public-key decryptors. More...

Inheritance diagram for PK_Decryptor:

Public Member Functions
virtual DecodingResult	Decrypt (RandomNumberGenerator &rng, const byte ciphertext, size_t ciphertextLength, byte plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const =0
	Decrypt a byte string. More...

virtual BufferedTransformation *	CreateDecryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs &parameters=g_nullNameValuePairs) const
	Create a new decryption filter. More...

DecodingResult	FixedLengthDecrypt (RandomNumberGenerator &rng, const byte ciphertext, byte plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const
	Decrypt a fixed size ciphertext. More...

Public Member Functions inherited from PK_CryptoSystem
virtual size_t	MaxPlaintextLength (size_t ciphertextLength) const =0
	Provides the maximum length of plaintext for a given ciphertext length. More...

virtual size_t	CiphertextLength (size_t plaintextLength) const =0
	Calculate the length of ciphertext given length of plaintext. More...

virtual bool	ParameterSupported (const char *name) const =0
	Determines whether this object supports the use of a named parameter. More...

virtual size_t	FixedCiphertextLength () const
	Provides the fixed ciphertext length, if one exists. More...

virtual size_t	FixedMaxPlaintextLength () const
	Provides the maximum plaintext length given a fixed ciphertext length. More...

Public Member Functions inherited from PrivateKeyAlgorithm
CryptoMaterial &	AccessMaterial ()
	Retrieves a reference to a Private Key. More...

const CryptoMaterial &	GetMaterial () const
	Retrieves a reference to a Private Key. More...

virtual PrivateKey &	AccessPrivateKey ()=0
	Retrieves a reference to a Private Key. More...

virtual const PrivateKey &	GetPrivateKey () const
	Retrieves a reference to a Private Key. More...

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

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

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

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

Detailed Description

Interface for public-key decryptors.

Definition at line 2737 of file cryptlib.h.

Member Function Documentation

◆ Decrypt()

virtual DecodingResult PK_Decryptor::Decrypt	(	RandomNumberGenerator &	rng,
		const byte *	ciphertext,
		size_t	ciphertextLength,
		byte *	plaintext,
		const NameValuePairs &	parameters = `g_nullNameValuePairs`
	)		const

pure virtual

Decrypt a byte string.

Parameters

rng	a RandomNumberGenerator derived class
ciphertext	the encrypted byte buffer
ciphertextLength	the size of the encrypted byte buffer
plaintext	a byte buffer to hold the decrypted string
parameters	a set of NameValuePairs to initialize this object

Returns: the result of the decryption operation

If DecodingResult::isValidCoding is true, then DecodingResult::messageLength is valid and holds the actual length of the plaintext recovered. The result is undefined if decryption failed. If DecodingResult::isValidCoding is false, then DecodingResult::messageLength is undefined.

Precondition: COUNTOF(plaintext) == MaxPlaintextLength(ciphertextLength) ensures the output byte buffer is large enough

See also: PK_Encryptor

Implemented in DL_DecryptorBase< T >.

◆ CreateDecryptionFilter()

virtual BufferedTransformation* PK_Decryptor::CreateDecryptionFilter	(	RandomNumberGenerator &	rng,
		BufferedTransformation *	attachment = `NULL`,
		const NameValuePairs &	parameters = `g_nullNameValuePairs`
	)		const

virtual

Create a new decryption filter.

Parameters

rng	a RandomNumberGenerator derived class
attachment	an attached transformation
parameters	a set of NameValuePairs to initialize this object

Returns: the newly created decryption filter

Note: the caller is responsible for deleting the returned pointer

◆ FixedLengthDecrypt()

DecodingResult PK_Decryptor::FixedLengthDecrypt	(	RandomNumberGenerator &	rng,
		const byte *	ciphertext,
		byte *	plaintext,
		const NameValuePairs &	parameters = `g_nullNameValuePairs`
	)		const

inline

Decrypt a fixed size ciphertext.

Parameters

rng	a RandomNumberGenerator derived class
ciphertext	the encrypted byte buffer
plaintext	a byte buffer to hold the decrypted string
parameters	a set of NameValuePairs to initialize this object

Returns: the result of the decryption operation

If DecodingResult::isValidCoding is true, then DecodingResult::messageLength is valid and holds the actual length of the plaintext recovered. The result is undefined if decryption failed. If DecodingResult::isValidCoding is false, then DecodingResult::messageLength is undefined.

Precondition: COUNTOF(plaintext) == MaxPlaintextLength(ciphertextLength) ensures the output byte buffer is large enough

See also: PK_Encryptor

Definition at line 2782 of file cryptlib.h.

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

cryptlib.h

Public Member Functions

Detailed Description

Member Function Documentation

◆ Decrypt()

◆ CreateDecryptionFilter()

◆ FixedLengthDecrypt()