Crypto++ 8.5 Free C++ class library of cryptographic schemes

Classes | Macros | Typedefs | Enumerations | Functions
pubkey.h File Reference

This file contains helper classes/functions for implementing public key algorithms. More...

Go to the source code of this file.

## Classes
class | TrapdoorFunctionBounds
| Provides range for plaintext and ciphertext lengths. More...
class | RandomizedTrapdoorFunction
| Applies the trapdoor function, using random data if required. More...
class | TrapdoorFunction
| Applies the trapdoor function. More...
class | RandomizedTrapdoorFunctionInverse
| Applies the inverse of the trapdoor function, using random data if required. More...
class | TrapdoorFunctionInverse
| Applies the inverse of the trapdoor function. More...
class | PK_EncryptionMessageEncodingMethod
| Message encoding method for public key encryption. More...
class | TF_Base< TFI, MEI >
| The base for trapdoor based cryptosystems. More...
class | PK_FixedLengthCryptoSystemImpl< BASE >
| Public key trapdoor function default implementation. More...
class | TF_CryptoSystemBase< INTFACE, BASE >
| Trapdoor function cryptosystem base class. More...
class | TF_DecryptorBase
| Trapdoor function cryptosystems decryption base class. More...
class | TF_EncryptorBase
| Trapdoor function cryptosystems encryption base class. More...
class | PK_SignatureMessageEncodingMethod
| Interface for message encoding method for public key signature schemes. More...
struct | PK_SignatureMessageEncodingMethod::HashIdentifierLookup
struct | PK_SignatureMessageEncodingMethod::HashIdentifierLookup::HashIdentifierLookup2< H >
class | PK_DeterministicSignatureMessageEncodingMethod
| Interface for message encoding method for public key signature schemes. More...
class | PK_RecoverableSignatureMessageEncodingMethod
| Interface for message encoding method for public key signature schemes. More...
class | DL_SignatureMessageEncodingMethod_DSA
| Interface for message encoding method for public key signature schemes. More...
class | DL_SignatureMessageEncodingMethod_NR
| Interface for message encoding method for public key signature schemes. More...
class | PK_MessageAccumulatorBase
| Interface for message encoding method for public key signature schemes. More...
class | PK_MessageAccumulatorImpl< HASH_ALGORITHM >
| Interface for message encoding method for public key signature schemes. More...
class | TF_SignatureSchemeBase< INTFACE, BASE >
| Trapdoor Function (TF) Signature Scheme base class. More...
class | TF_SignerBase
| Trapdoor Function (TF) Signer base class. More...
class | TF_VerifierBase
| Trapdoor Function (TF) Verifier base class. More...
struct | TF_CryptoSchemeOptions< T1, T2, T3 >
| Trapdoor Function (TF) scheme options. More...
struct | TF_SignatureSchemeOptions< T1, T2, T3, T4 >
| Trapdoor Function (TF) signature scheme options. More...
class | TF_ObjectImplBase< BASE, SCHEME_OPTIONS, KEY_CLASS >
| Trapdoor Function (TF) base implementation. More...
class | TF_ObjectImplExtRef< BASE, SCHEME_OPTIONS, KEY >
| Trapdoor Function (TF) signature with external reference. More...
class | TF_ObjectImpl< BASE, SCHEME_OPTIONS, KEY_CLASS >
| Trapdoor Function (TF) signature scheme options. More...
class | TF_DecryptorImpl< SCHEME_OPTIONS >
| Trapdoor Function (TF) decryptor options. More...
class | TF_EncryptorImpl< SCHEME_OPTIONS >
| Trapdoor Function (TF) encryptor options. More...
class | TF_SignerImpl< SCHEME_OPTIONS >
| Trapdoor Function (TF) encryptor options. More...
class | TF_VerifierImpl< SCHEME_OPTIONS >
| Trapdoor Function (TF) encryptor options. More...
class | MaskGeneratingFunction
| Mask generation function interface. More...
class | P1363_MGF1
| P1363 mask generation function. More...
class | P1363_KDF2< H >
| P1363 key derivation function. More...
class | DL_BadElement
| Exception thrown when an invalid group element is encountered. More...
class | DL_GroupParameters< T >
| Interface for Discrete Log (DL) group parameters. More...
class | DL_GroupParametersImpl< GROUP_PRECOMP, BASE_PRECOMP, BASE >
| Base implementation of Discrete Log (DL) group parameters. More...
class | DL_Key< T >
| Base class for a Discrete Log (DL) key. More...
class | DL_PublicKey< T >
| Interface for Discrete Log (DL) public keys. More...
class | DL_PrivateKey< T >
| Interface for Discrete Log (DL) private keys. More...
class | DL_KeyImpl< PK, GP, O >
| Discrete Log (DL) key base implementation. More...
class | DL_PrivateKeyImpl< GP >
| Discrete Log (DL) private key base implementation. More...
class | DL_PrivateKey_WithSignaturePairwiseConsistencyTest< BASE, SIGNATURE_SCHEME >
class | DL_PublicKeyImpl< GP >
| Discrete Log (DL) public key base implementation. More...
class | DL_ElgamalLikeSignatureAlgorithm< T >
| Interface for Elgamal-like signature algorithms. More...
class | DeterministicSignatureAlgorithm
| Interface for deterministic signers. More...
class | DL_KeyAgreementAlgorithm< T >
| Interface for DL key agreement algorithms. More...
class | DL_KeyDerivationAlgorithm< T >
| Interface for key derivation algorithms used in DL cryptosystems. More...
class | DL_SymmetricEncryptionAlgorithm
| Interface for symmetric encryption algorithms used in DL cryptosystems. More...
class | DL_Base< KI >
| Discrete Log (DL) base interface. More...
class | DL_SignatureSchemeBase< INTFACE, KEY_INTFACE >
| Discrete Log (DL) signature scheme base implementation. More...
class | DL_SignerBase< T >
| Discrete Log (DL) signature scheme signer base implementation. More...
class | DL_VerifierBase< T >
| Discret Log (DL) Verifier base class. More...
class | DL_CryptoSystemBase< PK, KI >
| Discrete Log (DL) cryptosystem base implementation. More...
class | DL_DecryptorBase< T >
| Discrete Log (DL) decryptor base implementation. More...
class | DL_EncryptorBase< T >
| Discrete Log (DL) encryptor base implementation. More...
struct | DL_SchemeOptionsBase< T1, T2 >
| Discrete Log (DL) scheme options. More...
struct | DL_KeyedSchemeOptions< T1, T2 >
| Discrete Log (DL) key options. More...
struct | DL_SignatureSchemeOptions< T1, T2, T3, T4, T5 >
| Discrete Log (DL) signature scheme options. More...
struct | DL_CryptoSchemeOptions< T1, T2, T3, T4, T5 >
| Discrete Log (DL) crypto scheme options. More...
class | DL_ObjectImplBase< BASE, SCHEME_OPTIONS, KEY >
| Discrete Log (DL) base object implementation. More...
class | DL_ObjectImpl< BASE, SCHEME_OPTIONS, KEY >
| Discrete Log (DL) object implementation. More...
class | DL_SignerImpl< SCHEME_OPTIONS >
| Discrete Log (DL) signer implementation. More...
class | DL_VerifierImpl< SCHEME_OPTIONS >
| Discrete Log (DL) verifier implementation. More...
class | DL_EncryptorImpl< SCHEME_OPTIONS >
| Discrete Log (DL) encryptor implementation. More...
class | DL_DecryptorImpl< SCHEME_OPTIONS >
| Discrete Log (DL) decryptor implementation. More...
class | DL_SimpleKeyAgreementDomainBase< T >
| Discrete Log (DL) simple key agreement base implementation. More...
class | DL_KeyAgreementAlgorithm_DH< ELEMENT, COFACTOR_OPTION >
| Diffie-Hellman key agreement algorithm. More...
class | PK_FinalTemplate< BASE >
| Template implementing constructors for public key algorithm classes. More...
struct | EncryptionStandard
| Base class for public key encryption standard classes. More...
struct | SignatureStandard
| Base class for public key signature standard classes. More...
class | TF_ES< KEYS, STANDARD, ALG_INFO >
| Trapdoor Function (TF) encryption scheme. More...
class | TF_ES< KEYS, STANDARD, ALG_INFO >
| Trapdoor Function (TF) encryption scheme. More...
class | TF_SS< KEYS, STANDARD, H, ALG_INFO >
| Trapdoor Function (TF) Signature Scheme. More...
class | TF_SS< KEYS, STANDARD, H, ALG_INFO >
| Trapdoor Function (TF) Signature Scheme. More...
class | DL_SS< KEYS, SA, MEM, H, ALG_INFO >
| Discrete Log (DL) signature scheme. More...
class | DL_SS< KEYS, SA, MEM, H, ALG_INFO >
| Discrete Log (DL) signature scheme. More...
class | DL_ES< KEYS, AA, DA, EA, ALG_INFO >
| Discrete Log (DL) encryption scheme. More...

## Macros
#define | MAYBE_RETURN(x) CRYPTOPP_UNUSED(x)

## Typedefs
typedef std::pair< const byte *, unsigned int > | HashIdentifier
typedef EnumToType< CofactorMultiplicationOption, NO_COFACTOR_MULTIPLICTION > | NoCofactorMultiplication
typedef EnumToType< CofactorMultiplicationOption, COMPATIBLE_COFACTOR_MULTIPLICTION > | CompatibleCofactorMultiplication
typedef EnumToType< CofactorMultiplicationOption, INCOMPATIBLE_COFACTOR_MULTIPLICTION > | IncompatibleCofactorMultiplication

## Enumerations
enum | CofactorMultiplicationOption { NO_COFACTOR_MULTIPLICTION, COMPATIBLE_COFACTOR_MULTIPLICTION, INCOMPATIBLE_COFACTOR_MULTIPLICTION }
| Methods for avoiding "Small-Subgroup" attacks on Diffie-Hellman Key Agreement. More...

## Functions
CRYPTOPP_DLL void | P1363_MGF1KDF2_Common (HashTransformation &hash, byte *output, size_t outputLength, const byte *input, size_t inputLength, const byte *derivationParams, size_t derivationParamsLength, bool mask, unsigned int counterStart)

## Detailed Description

This file contains helper classes/functions for implementing public key algorithms.

The class hierachies in this header file tend to look like this:

                      x1
                     +--+
                     |  |
                    y1  z1
                     |  |
                x2<y1>  x2<z1>
                     |  |
                    y2  z2
                     |  |
                x3<y2>  x3<z2>
                     |  |
                    y3  z3

- x1, y1, z1 are abstract interface classes defined in cryptlib.h
- x2, y2, z2 are implementations of the interfaces using "abstract policies", which are pure virtual functions that should return interfaces to interchangeable algorithms. These classes have Base suffixes.
- x3, y3, z3 hold actual algorithms and implement those virtual functions. These classes have Impl suffixes.

The TF_ prefix means an implementation using trapdoor functions on integers.

The DL_ prefix means an implementation using group operations in groups where discrete log is hard.

Definition in file pubkey.h.

## Enumeration Type Documentation

## ◆ CofactorMultiplicationOption

enum CofactorMultiplicationOption

Methods for avoiding "Small-Subgroup" attacks on Diffie-Hellman Key Agreement.

Additional methods exist and include public key validation and choice of prime p.

See also
  Methods for Avoiding the "Small-Subgroup" Attacks on the Diffie-Hellman Key Agreement Method for S/MIME

Enumerator
NO_COFACTOR_MULTIPLICTION | No cofactor multiplication applied.
COMPATIBLE_COFACTOR_MULTIPLICTION | Cofactor multiplication compatible with ordinary Diffie-Hellman. Modifies the computation of ZZ by including j (the cofactor) in the computations and is compatible with ordinary Diffie-Hellman.
INCOMPATIBLE_COFACTOR_MULTIPLICTION | Cofactor multiplication incompatible with ordinary Diffie-Hellman. Modifies the computation of ZZ by including j (the cofactor) in the computations but is not compatible with ordinary Diffie-Hellman.

Definition at line 2113 of file pubkey.h.