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InvertibleRWFunction Class Reference

#include <rw.h>

Inheritance diagram for InvertibleRWFunction:

RWFunction TrapdoorFunctionInverse PrivateKey TrapdoorFunction PublicKey RandomizedTrapdoorFunctionInverse GeneratableCryptoMaterial RandomizedTrapdoorFunction CryptoMaterial CryptoMaterial TrapdoorFunctionBounds NameValuePairs NameValuePairs List of all members.

Detailed Description

_

Definition at line 42 of file rw.h.

Public Member Functions

void Initialize (const Integer &n, const Integer &p, const Integer &q, const Integer &u)
void Initialize (RandomNumberGenerator &rng, unsigned int modulusBits)
void BERDecode (BufferedTransformation &bt)
void DEREncode (BufferedTransformation &bt) const
Integer CalculateInverse (RandomNumberGenerator &rng, const Integer &x) const
bool Validate (RandomNumberGenerator &rng, unsigned int level) const
 check this object for errors
bool GetVoidValue (const char *name, const std::type_info &valueType, void *pValue) const
 to be implemented by derived classes, users should use one of the above functions instead
void AssignFrom (const NameValuePairs &source)
 assign values from source to this object
void GenerateRandom (RandomNumberGenerator &rng, const NameValuePairs &alg)
const IntegerGetPrime1 () const
const IntegerGetPrime2 () const
const IntegerGetMultiplicativeInverseOfPrime2ModPrime1 () const
void SetPrime1 (const Integer &p)
void SetPrime2 (const Integer &q)
void SetMultiplicativeInverseOfPrime2ModPrime1 (const Integer &u)
void Initialize (const Integer &n)
Integer ApplyFunction (const Integer &x) const
Integer PreimageBound () const
Integer ImageBound () const
const IntegerGetModulus () const
void SetModulus (const Integer &n)
Integer ApplyRandomizedFunction (RandomNumberGenerator &rng, const Integer &x) const
bool IsRandomized () const
virtual Integer MaxPreimage () const
virtual Integer MaxImage () const
virtual void ThrowIfInvalid (RandomNumberGenerator &rng, unsigned int level) const
 throws InvalidMaterial if this object fails Validate() test
virtual void Save (BufferedTransformation &bt) const
 save key into a BufferedTransformation
virtual void Load (BufferedTransformation &bt)
 load key from a BufferedTransformation
virtual bool SupportsPrecomputation () const
 whether this object supports precomputation
virtual void Precompute (unsigned int n)
 do precomputation
virtual void LoadPrecomputation (BufferedTransformation &storedPrecomputation)
 retrieve previously saved precomputation
virtual void SavePrecomputation (BufferedTransformation &storedPrecomputation) const
 save precomputation for later use
void DoQuickSanityCheck () const
template<class T> bool GetThisObject (T &object) const
 get a copy of this object or a subobject of it
template<class T> bool GetThisPointer (T *&p) const
 get a pointer to this object, as a pointer to T
template<class T> bool GetValue (const char *name, T &value) const
 get a named value, returns true if the name exists
template<class T> T GetValueWithDefault (const char *name, T defaultValue) const
 get a named value, returns the default if the name doesn't exist
std::string GetValueNames () const
 get a list of value names that can be retrieved
bool GetIntValue (const char *name, int &value) const
 get a named value with type int
int GetIntValueWithDefault (const char *name, int defaultValue) const
 get a named value with type int, with default
template<class T> void GetRequiredParameter (const char *className, const char *name, T &value) const
void GetRequiredIntParameter (const char *className, const char *name, int &value) const
Integer CalculateRandomizedInverse (RandomNumberGenerator &rng, const Integer &x) const
bool IsRandomized () const
void GenerateRandomWithKeySize (RandomNumberGenerator &rng, unsigned int keySize)
 calls the above function with a NameValuePairs object that just specifies "KeySize"

Static Public Member Functions

void ThrowIfTypeMismatch (const char *name, const std::type_info &stored, const std::type_info &retrieving)
 used by derived classes to check for type mismatch

Protected Attributes

Integer m_p
Integer m_q
Integer m_u
Integer m_n


Member Function Documentation

bool InvertibleRWFunction::Validate RandomNumberGenerator rng,
unsigned int  level
const [virtual]
 

check this object for errors

Parameters:
level denotes the level of thoroughness: 0 - using this object won't cause a crash or exception (rng is ignored) 1 - this object will probably function (encrypt, sign, etc.) correctly (but may not check for weak keys and such) 2 - make sure this object will function correctly, and do reasonable security checks 3 - do checks that may take a long time
Returns:
true if the tests pass

Reimplemented from RWFunction.

Definition at line 169 of file rw.cpp.

References Integer::IsPositive(), Integer::One(), and RWFunction::Validate().

void InvertibleRWFunction::AssignFrom const NameValuePairs source  )  [virtual]
 

assign values from source to this object

Note:
This function can be used to create a public key from a private key.

Reimplemented from RWFunction.

Definition at line 194 of file rw.cpp.

void InvertibleRWFunction::GenerateRandom RandomNumberGenerator rng,
const NameValuePairs alg
[virtual]
 

parameters: (ModulusSize)

Reimplemented from GeneratableCryptoMaterial.

Definition at line 111 of file rw.cpp.

References Integer::GenerateRandom(), NameValuePairs::GetIntValue(), and Integer::InverseMod().

virtual void CryptoMaterial::Load BufferedTransformation bt  )  [inline, virtual, inherited]
 

load key from a BufferedTransformation

Exceptions:
KeyingErr if decode fails
Note:
Generally does not check that the key is valid. Call ValidateKey() or ThrowIfInvalidKey() to check that.

Reimplemented in ASN1CryptoMaterial.

Definition at line 994 of file cryptlib.h.

virtual void CryptoMaterial::Precompute unsigned int  n  )  [inline, virtual, inherited]
 

do precomputation

The exact semantics of Precompute() is varies, but typically it means calculate a table of n objects that can be used later to speed up computation.

Reimplemented in DL_GroupParameters< T >, DL_PrivateKeyImpl< GP >, DL_PublicKeyImpl< GP >, DL_GroupParameters< Integer >, DL_GroupParameters< typenameEcPrecomputation< EC >::Element >, DL_PrivateKeyImpl< DL_GroupParameters_EC< EC > >, and DL_PublicKeyImpl< DL_GroupParameters_EC< EC > >.

Definition at line 1003 of file cryptlib.h.

bool NameValuePairs::GetIntValue const char *  name,
int &  value
const [inline, inherited]
 

get a named value with type int

used to ensure we don't accidentally try to get an unsigned int or some other type when we mean int (which is the most common case) Definition at line 278 of file cryptlib.h.

Referenced by GenerateRandom(), InvertibleRSAFunction::GenerateRandom(), InvertibleRabinFunction::GenerateRandom(), InvertibleLUCFunction::GenerateRandom(), DL_GroupParameters_IntegerBased::GenerateRandom(), DL_GroupParameters_DSA::GenerateRandom(), and InvertibleESIGNFunction::GenerateRandom().


The documentation for this class was generated from the following files:
Generated on Wed Jul 21 19:15:56 2004 for Crypto++ by doxygen 1.3.7-20040704