Trapdoor function cryptosystems decryption base class. More...
Public Member Functions | |
DecodingResult | Decrypt (RandomNumberGenerator &rng, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs ¶meters=g_nullNameValuePairs) const |
Decrypt a byte string. | |
bool | ParameterSupported (const char *name) const |
this object supports the use of the parameter with the given name | |
size_t | FixedMaxPlaintextLength () const |
return maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0 | |
size_t | FixedCiphertextLength () const |
return fixed ciphertext length, if one exists, otherwise return 0 | |
size_t | MaxPlaintextLength (size_t ciphertextLength) const |
maximum length of plaintext for a given ciphertext length | |
size_t | CiphertextLength (size_t plaintextLength) const |
calculate length of ciphertext given length of plaintext | |
virtual BufferedTransformation * | CreateDecryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs ¶meters=g_nullNameValuePairs) const |
create a new decryption filter | |
DecodingResult | FixedLengthDecrypt (RandomNumberGenerator &rng, const byte *ciphertext, byte *plaintext, const NameValuePairs ¶meters=g_nullNameValuePairs) const |
decrypt a fixed size ciphertext | |
CryptoMaterial & | AccessMaterial () |
returns a reference to the crypto material used by this object | |
const CryptoMaterial & | GetMaterial () const |
returns a const reference to the crypto material used by this object | |
virtual PrivateKey & | AccessPrivateKey ()=0 |
virtual const PrivateKey & | GetPrivateKey () const |
void | BERDecode (BufferedTransformation &bt) |
for backwards compatibility, calls AccessMaterial().Load(bt) | |
void | DEREncode (BufferedTransformation &bt) const |
for backwards compatibility, calls GetMaterial().Save(bt) | |
virtual std::string | AlgorithmName () const |
Provides the name of this algorithm. | |
virtual Clonable * | Clone () const |
Copies this object. |
Trapdoor function cryptosystems decryption base class.
Trapdoor function cryptosystems encryption base class.
Definition at line 296 of file pubkey.h.
DecodingResult TF_DecryptorBase::Decrypt | ( | RandomNumberGenerator & | rng, | |
const byte * | ciphertext, | |||
size_t | ciphertextLength, | |||
byte * | plaintext, | |||
const NameValuePairs & | parameters = g_nullNameValuePairs | |||
) | const [virtual] |
Decrypt a byte string.
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 | additional configuration options |
COUNTOF(plaintext) == MaxPlaintextLength(ciphertextLength)
ensures the output byte buffer is large enoughIf DecodingResult::isValidCoding is true, then DecodingResult::messageLength is valid and holds the the actual length of the plaintext recovered. on success. The result is undefined if decryption failed. If DecodingResult::isValidCoding is false, then DecodingResult::messageLength is undefined.
Implements PK_Decryptor.
Definition at line 140 of file pubkey.cpp.
References Algorithm::AlgorithmName(), Integer::ByteCount(), Integer::Encode(), IntToString(), SecBlock< T, A >::size(), and Integer::Zero().
bool TF_CryptoSystemBase< PK_Decryptor , TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >::ParameterSupported | ( | const char * | name | ) | const [inline, virtual, inherited] |
Implements PK_CryptoSystem.
size_t TF_CryptoSystemBase< PK_Decryptor , TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >::FixedCiphertextLength | ( | ) | const [inline, virtual, inherited] |
Implements PK_FixedLengthCryptoSystemImpl< PK_Decryptor >.
size_t PK_FixedLengthCryptoSystemImpl< PK_Decryptor >::MaxPlaintextLength | ( | size_t | ciphertextLength | ) | const [inline, virtual, inherited] |
Implements PK_CryptoSystem.
size_t PK_FixedLengthCryptoSystemImpl< PK_Decryptor >::CiphertextLength | ( | size_t | plaintextLength | ) | const [inline, virtual, inherited] |
Implements PK_CryptoSystem.
BufferedTransformation * PK_Decryptor::CreateDecryptionFilter | ( | RandomNumberGenerator & | rng, | |
BufferedTransformation * | attachment = NULL , |
|||
const NameValuePairs & | parameters = g_nullNameValuePairs | |||
) | const [virtual, inherited] |
create a new decryption filter
Definition at line 864 of file cryptlib.cpp.
virtual std::string Algorithm::AlgorithmName | ( | ) | const [inline, virtual, inherited] |
Provides the name of this algorithm.
The standard algorithm name can be a name like AES or AES/GCM. Some algorithms do not have standard names yet. For example, there is no standard algorithm name for Shoup's ECIES.
Reimplemented in Adler32, CCM_Base, CRC32, ClassNullRNG, AuthenticatedSymmetricCipher, DH_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >, EAX_Base, StreamTransformationFilter, HashFilter, HashVerificationFilter, AuthenticatedDecryptionFilter, SignerFilter, SignatureVerificationFilter, GCM_Base, HMAC< T >, RDRAND, RDSEED, SHA3, BitBucket, and VMAC_Base.
Definition at line 488 of file cryptlib.h.
Referenced by BufferedTransformation::ChannelCreatePutSpace(), BufferedTransformation::ChannelFlush(), BufferedTransformation::ChannelMessageSeriesEnd(), BufferedTransformation::ChannelPut2(), Decrypt(), TF_EncryptorBase::Encrypt(), StreamTransformation::ProcessLastBlock(), and PK_DefaultDecryptionFilter::Put2().
virtual Clonable* Clonable::Clone | ( | ) | const [inline, virtual, inherited] |
Copies this object.
NotImplemented |
Definition at line 464 of file cryptlib.h.