1 #ifndef CRYPTOPP_ESIGN_H 2 #define CRYPTOPP_ESIGN_H 32 bool GetVoidValue(
const char *name,
const std::type_info &valueType,
void *pValue)
const;
41 const Integer & GetModulus()
const {
return m_n;}
42 const Integer & GetPublicExponent()
const {
return m_e;}
44 void SetModulus(
const Integer &n) {m_n = n;}
45 void SetPublicExponent(
const Integer &e) {m_e = e;}
61 {m_n = n; m_e = e; m_p = p; m_q = q;}
73 bool GetVoidValue(
const char *name,
const std::type_info &valueType,
void *pValue)
const;
78 const Integer& GetPrime1()
const {
return m_p;}
79 const Integer& GetPrime2()
const {
return m_q;}
81 void SetPrime1(
const Integer &p) {m_p = p;}
82 void SetPrime2(
const Integer &q) {m_q = q;}
93 static const char *StaticAlgorithmName() {
return "EMSA5";}
96 const byte *recoverableMessage,
size_t recoverableMessageLength,
98 byte *representative,
size_t representativeBitLength)
const 100 CRYPTOPP_UNUSED(rng), CRYPTOPP_UNUSED(recoverableMessage), CRYPTOPP_UNUSED(recoverableMessageLength);
101 CRYPTOPP_UNUSED(messageEmpty), CRYPTOPP_UNUSED(hashIdentifier);
104 size_t representativeByteLength =
BitsToBytes(representativeBitLength);
106 mgf.GenerateAndMask(hash, representative, representativeByteLength, digest, digest.size(),
false);
107 if (representativeBitLength % 8 != 0)
108 representative[0] = (byte)
Crop(representative[0], representativeBitLength % 8);
120 static std::string StaticAlgorithmName() {
return "ESIGN";}
126 template <
class H,
class STANDARD = P1363_EMSA5>
Integer CalculateRandomizedInverse(RandomNumberGenerator &rng, const Integer &x) const
Applies the inverse of the trapdoor function, using random data if required.
Utility functions for the Crypto++ library.
size_t BitsToBytes(size_t bitCount)
Returns the number of 8-bit bytes or octets required for the specified number of bits.
This file contains helper classes/functions for implementing public key algorithms.
Integer ImageBound() const
Returns the maximum size of a message after the trapdoor function is applied.
ESIGN, as defined in IEEE P1363a.
Abstract base classes that provide a uniform interface to this library.
void DEREncode(BufferedTransformation &bt) const
Encode this object into a BufferedTransformation.
Interface for random number generators.
bool Validate(RandomNumberGenerator &rng, unsigned int level) const
Check this object for errors.
SecByteBlock is a SecBlock<byte> typedef.
Interface for private keys.
Base class for public key signature standard classes.
void BERDecode(BufferedTransformation &bt)
Decode this object from a BufferedTransformation.
Interface for message encoding method for public key signature schemes.
T Crop(T value, size_t bits)
Truncates the value to the specified number of bits.
void AssignFrom(const NameValuePairs &source)
Assign values to this object.
Integer PreimageBound() const
Returns the maximum size of a message before the trapdoor function is applied.
static Integer Power2(size_t e)
Exponentiates to a power of 2.
Multiple precision integer with arithmetic operations.
T1 SaturatingSubtract(const T1 &a, const T2 &b)
Performs a saturating subtract clamped at 0.
Applies the trapdoor function.
EMSA5, for use with ESIGN.
Classes and functions for working with ANS.1 objects.
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
Get a named value.
void GenerateRandomWithKeySize(RandomNumberGenerator &rng, unsigned int keySize)
Generate a random key or crypto parameters.
Interface for public keys.
Crypto++ library namespace.
Applies the inverse of the trapdoor function, using random data if required.
void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg)
Interface for retrieving values given their names.
Trapdoor Function Based Signature Scheme.