Crypto++ 8.9
Free C++ class library of cryptographic schemes
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ESIGN trapdoor function using the public key. More...
#include <esign.h>
Public Member Functions | |
void | Initialize (const Integer &n, const Integer &e) |
Initialize a ESIGN public key with {n,e}. | |
void | BERDecode (BufferedTransformation &bt) |
Decode this object from a BufferedTransformation. | |
void | DEREncode (BufferedTransformation &bt) const |
Encode this object into a BufferedTransformation. | |
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 |
Get a named value. | |
void | AssignFrom (const NameValuePairs &source) |
Assign values to this object. | |
Integer | ApplyFunction (const Integer &x) const |
Applies the trapdoor. | |
Integer | PreimageBound () const |
Returns the maximum size of a message before the trapdoor function is applied. | |
Integer | ImageBound () const |
Returns the maximum size of a representation after the trapdoor function is applied. | |
const Integer & | GetModulus () const |
const Integer & | GetPublicExponent () const |
void | SetModulus (const Integer &n) |
void | SetPublicExponent (const Integer &e) |
Public Member Functions inherited from TrapdoorFunction | |
Integer | ApplyRandomizedFunction (RandomNumberGenerator &rng, const Integer &x) const |
Applies the trapdoor function. | |
bool | IsRandomized () const |
Determines if the encryption algorithm is randomized. | |
Public Member Functions inherited from TrapdoorFunctionBounds | |
virtual Integer | MaxPreimage () const |
Returns the maximum size of a message before the trapdoor function is applied bound to a public key. | |
virtual Integer | MaxImage () const |
Returns the maximum size of a representation after the trapdoor function is applied bound to a public key. | |
Public Member Functions inherited from ASN1CryptoMaterial< PublicKey > | |
void | Save (BufferedTransformation &bt) const |
DER encode ASN.1 object. | |
void | Load (BufferedTransformation &bt) |
BER decode ASN.1 object. | |
Public Member Functions inherited from ASN1Object | |
virtual void | BEREncode (BufferedTransformation &bt) const |
Encode this object into a BufferedTransformation. | |
Public Member Functions inherited from CryptoMaterial | |
virtual void | ThrowIfInvalid (RandomNumberGenerator &rng, unsigned int level) const |
Check this object for errors. | |
virtual bool | SupportsPrecomputation () const |
Determines whether the object supports precomputation. | |
virtual void | Precompute (unsigned int precomputationStorage) |
Perform precomputation. | |
virtual void | LoadPrecomputation (BufferedTransformation &storedPrecomputation) |
Retrieve previously saved precomputation. | |
virtual void | SavePrecomputation (BufferedTransformation &storedPrecomputation) const |
Save precomputation for later use. | |
void | DoQuickSanityCheck () const |
Perform a quick sanity check. | |
Public Member Functions inherited from NameValuePairs | |
template<class T > | |
bool | GetThisObject (T &object) const |
Get a copy of this object or subobject. | |
template<class T > | |
bool | GetThisPointer (T *&ptr) const |
Get a pointer to this object. | |
template<class T > | |
bool | GetValue (const char *name, T &value) const |
Get a named value. | |
template<class T > | |
T | GetValueWithDefault (const char *name, T defaultValue) const |
Get a named value. | |
CRYPTOPP_DLL std::string | GetValueNames () const |
Get a list of value names that can be retrieved. | |
CRYPTOPP_DLL bool | GetIntValue (const char *name, int &value) const |
Get a named value with type int. | |
CRYPTOPP_DLL int | GetIntValueWithDefault (const char *name, int defaultValue) const |
Get a named value with type int, with default. | |
CRYPTOPP_DLL bool | GetWord64Value (const char *name, word64 &value) const |
Get a named value with type word64. | |
CRYPTOPP_DLL word64 | GetWord64ValueWithDefault (const char *name, word64 defaultValue) const |
Get a named value with type word64, with default. | |
template<class T > | |
void | GetRequiredParameter (const char *className, const char *name, T &value) const |
Retrieves a required name/value pair. | |
CRYPTOPP_DLL void | GetRequiredIntParameter (const char *className, const char *name, int &value) const |
Retrieves a required name/value pair. | |
Additional Inherited Members | |
Static Public Member Functions inherited from NameValuePairs | |
static CRYPTOPP_DLL void | ThrowIfTypeMismatch (const char *name, const std::type_info &stored, const std::type_info &retrieving) |
Ensures an expected name and type is present. | |
ESIGN trapdoor function using the public key.
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virtual |
Decode this object from a BufferedTransformation.
bt | BufferedTransformation object |
Uses Basic Encoding Rules (BER)
Implements ASN1Object.
Reimplemented in InvertibleESIGNFunction.
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virtual |
Encode this object into a BufferedTransformation.
bt | BufferedTransformation object |
Uses Distinguished Encoding Rules (DER)
Implements ASN1Object.
Reimplemented in InvertibleESIGNFunction.
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virtual |
Check this object for errors.
rng | a RandomNumberGenerator for objects which use randomized testing |
level | the level of thoroughness |
There are four levels of thoroughness:
Level 0 does not require a RandomNumberGenerator. A NullRNG() can be used for level 0. Level 1 may not check for weak keys and such. Levels 2 and 3 are recommended.
Implements CryptoMaterial.
Reimplemented in InvertibleESIGNFunction.
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virtual |
Get a named value.
name | the name of the object or value to retrieve |
valueType | reference to a variable that receives the value |
pValue | void pointer to a variable that receives the value |
GetVoidValue() retrieves the value of name if it exists.
Implements NameValuePairs.
Reimplemented in InvertibleESIGNFunction.
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virtual |
Assign values to this object.
This function can be used to create a public key from a private key.
Implements CryptoMaterial.
Reimplemented in InvertibleESIGNFunction.
Applies the trapdoor.
x | the message on which the encryption function is applied |
ApplyFunction is a generalization of encryption under a public key cryptosystem. Derived classes must implement it.
Implements TrapdoorFunction.
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inlinevirtual |
Returns the maximum size of a message before the trapdoor function is applied.
Derived classes must implement PreimageBound().
Implements TrapdoorFunctionBounds.
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inlinevirtual |
Returns the maximum size of a representation after the trapdoor function is applied.
Derived classes must implement ImageBound().
Implements TrapdoorFunctionBounds.
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inline |
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inline |