#include <cryptlib.h>
Inheritance diagram for PK_CryptoSystem:
This class provides an interface common to encryptors and decryptors for querying their plaintext and ciphertext lengths.
Definition at line 1109 of file cryptlib.h.
Public Member Functions | |
virtual | ~PK_CryptoSystem () |
virtual unsigned int | MaxPlaintextLength (unsigned int ciphertextLength) const =0 |
maximum length of plaintext for a given ciphertext length | |
virtual unsigned int | CiphertextLength (unsigned int plaintextLength) const =0 |
calculate length of ciphertext given length of plaintext | |
virtual bool | ParameterSupported (const char *name) const =0 |
this object supports the use of the parameter with the given name | |
virtual unsigned int | FixedCiphertextLength () const |
return fixed ciphertext length, if one exists, otherwise return 0 | |
virtual unsigned int | FixedMaxPlaintextLength () const |
return maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0 |
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maximum length of plaintext for a given ciphertext length
Implemented in PK_FixedLengthCryptoSystemImpl< PK_Encryptor >, PK_FixedLengthCryptoSystemImpl< PK_Decryptor >, DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< Integer > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< SCHEME_OPTIONS::Element > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< Integer > >, DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< SCHEME_OPTIONS::Element > >, and DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< T > >. |
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calculate length of ciphertext given length of plaintext
Implemented in PK_FixedLengthCryptoSystemImpl< PK_Encryptor >, PK_FixedLengthCryptoSystemImpl< PK_Decryptor >, DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< Integer > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< SCHEME_OPTIONS::Element > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< Integer > >, DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< SCHEME_OPTIONS::Element > >, and DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< T > >. Referenced by PK_DefaultEncryptionFilter::Put2(). |
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this object supports the use of the parameter with the given name some possible parameter names: EncodingParameters, KeyDerivationParameters Implemented in TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >, TF_CryptoSystemBase< PK_Encryptor, TF_Base< RandomizedTrapdoorFunction, PK_EncryptionMessageEncodingMethod > >, DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< Integer > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< SCHEME_OPTIONS::Element > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > >, DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< Integer > >, DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< SCHEME_OPTIONS::Element > >, and DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< T > >. |
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return fixed ciphertext length, if one exists, otherwise return 0
Reimplemented in ElGamalObjectImpl< DL_DecryptorBase< Integer >, SchemeOptions, SchemeOptions::PrivateKey >, ElGamalObjectImpl< DL_EncryptorBase< Integer >, SchemeOptions, SchemeOptions::PublicKey >, TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >, and TF_CryptoSystemBase< PK_Encryptor, TF_Base< RandomizedTrapdoorFunction, PK_EncryptionMessageEncodingMethod > >. Definition at line 1129 of file cryptlib.h. |