Crypto++
5.6.3
Free C++ class library of cryptographic schemes
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Public Types | |
typedef T | Element |
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. More... | |
size_t | MaxPlaintextLength (size_t ciphertextLength) const |
size_t | CiphertextLength (size_t plaintextLength) const |
bool | ParameterSupported (const char *name) const |
virtual BufferedTransformation * | CreateDecryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs ¶meters=g_nullNameValuePairs) const |
create a new decryption filter More... | |
DecodingResult | FixedLengthDecrypt (RandomNumberGenerator &rng, const byte *ciphertext, byte *plaintext, const NameValuePairs ¶meters=g_nullNameValuePairs) const |
decrypt a fixed size ciphertext | |
virtual size_t | FixedCiphertextLength () const |
return fixed ciphertext length, if one exists, otherwise return 0 More... | |
virtual size_t | FixedMaxPlaintextLength () const |
return maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0 | |
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. More... | |
virtual Clonable * | Clone () const |
Copies this object. More... | |
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inlinevirtual |
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.
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virtualinherited |
create a new decryption filter
Definition at line 864 of file cryptlib.cpp.
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inlinevirtualinherited |
return fixed ciphertext length, if one exists, otherwise return 0
Definition at line 2150 of file cryptlib.h.
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inlinevirtualinherited |
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 AuthenticatedSymmetricCipher, SignatureVerificationFilter, SignerFilter, AuthenticatedDecryptionFilter, HashVerificationFilter, HashFilter, StreamTransformationFilter, ClassNullRNG, BitBucket, RDSEED, DH_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >, HMAC< T >, RDRAND, CRC32, GCM_Base, Adler32, EAX_Base, CCM_Base, SHA3, and VMAC_Base.
Definition at line 488 of file cryptlib.h.
Referenced by VariableRounds< 6, 2 >::StaticGetDefaultRounds().
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inlinevirtualinherited |
Copies this object.
NotImplemented |
Definition at line 464 of file cryptlib.h.