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PK_FixedLengthCryptoSystem Class Reference

abstract base class for encryptors and decryptors with fixed length ciphertext. More...

#include <cryptlib.h>

Inheritance diagram for PK_FixedLengthCryptoSystem:

List of all members.

Public Methods
virtual unsigned int	MaxPlainTextLength ()const=0
virtual unsigned int	CipherTextLength ()const=0
unsigned int	MaxPlainTextLength (unsigned int cipherTextLength)const
	maximum length of plaintext for a given ciphertext length. More...
unsigned int	CipherTextLength (unsigned int plainTextLength)const
	calculate length of ciphertext given length of plaintext. More...

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Detailed Description

abstract base class for encryptors and decryptors with fixed length ciphertext.

A simplified interface (as embodied in this class and its subclasses) is provided for crypto systems (such as RSA) whose ciphertext length depend only on the key, not on the length of the plaintext. The maximum plaintext length also depend only on the key.

Definition at line 519 of file cryptlib.h.

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Member Function Documentation

unsigned int PK_FixedLengthCryptoSystem::CipherTextLength ( unsigned int plainTextLength ) const [virtual]

calculate length of ciphertext given length of plaintext. Reimplemented from PK_CryptoSystem. Definition at line 455 of file cryptlib.cpp. Referenced by DecryptorTemplate::Decrypt(), PK_FixedLengthDecryptor::Decrypt(), EncryptorTemplate::Encrypt(), and MaxPlainTextLength().

unsigned int PK_FixedLengthCryptoSystem::MaxPlainTextLength ( unsigned int cipherTextLength ) const [virtual]

maximum length of plaintext for a given ciphertext length. Reimplemented from PK_CryptoSystem. Definition at line 447 of file cryptlib.cpp. Referenced by CipherTextLength(), LUCELG_Decryptor::Decrypt(), ElGamalDecryptor::Decrypt(), EncryptorTemplate::Encrypt(), and LUCELG_Encryptor::Encrypt().

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

• cryptlib.h
• cryptlib.cpp

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