dh2.cpp
// dh2.cpp - originally written and placed in the public domain by Wei Dai
#include "pch.h"
#include "cryptlib.h"
#include "misc.h"
#include "dh2.h"
NAMESPACE_BEGIN(CryptoPP)
#if defined(CRYPTOPP_DEBUG) && !defined(CRYPTOPP_DOXYGEN_PROCESSING)
struct NullCryptoParameters : public CryptoParameters
{
void AssignFrom(const NameValuePairs &source) {
CRYPTOPP_UNUSED(source);
}
bool Validate(RandomNumberGenerator &rng, unsigned int level) const {
CRYPTOPP_UNUSED(rng); CRYPTOPP_UNUSED(level);
return false;
}
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const {
CRYPTOPP_UNUSED(name); CRYPTOPP_UNUSED(valueType); CRYPTOPP_UNUSED(pValue);
return false;
}
};
struct NullSimpleKeyAgreementDomain : public TwoBases<NullCryptoParameters, SimpleKeyAgreementDomain>
{
CryptoParameters & AccessCryptoParameters() {
return *this;
}
unsigned int AgreedValueLength() const {
return 1;
}
unsigned int PrivateKeyLength() const {
return 1;
}
unsigned int PublicKeyLength() const {
return 1;
}
void GeneratePrivateKey(RandomNumberGenerator &rng, byte *privateKey) const {
CRYPTOPP_UNUSED(rng); CRYPTOPP_UNUSED(privateKey);
}
void GeneratePublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const {
CRYPTOPP_UNUSED(rng); CRYPTOPP_UNUSED(privateKey); CRYPTOPP_UNUSED(publicKey);
}
bool Agree(byte *agreedValue, const byte *privateKey, const byte *otherPublicKey, bool validateOtherPublicKey=true) const {
CRYPTOPP_UNUSED(agreedValue); CRYPTOPP_UNUSED(privateKey);
CRYPTOPP_UNUSED(otherPublicKey); CRYPTOPP_UNUSED(validateOtherPublicKey);
return false;
}
};
void DH2_TestInstantiations()
{
NullSimpleKeyAgreementDomain dom;
DH2 dh(dom);
}
#endif
bool DH2::Agree(byte *agreedValue,
const byte *staticSecretKey, const byte *ephemeralSecretKey,
const byte *staticOtherPublicKey, const byte *ephemeralOtherPublicKey,
bool validateStaticOtherPublicKey) const
{
return d1.Agree(agreedValue, staticSecretKey, staticOtherPublicKey, validateStaticOtherPublicKey)
&& d2.Agree(agreedValue+d1.AgreedValueLength(), ephemeralSecretKey, ephemeralOtherPublicKey, true);
}
NAMESPACE_END
CryptoMaterial::AssignFrom
virtual void AssignFrom(const NameValuePairs &source)=0
Assign values to this object.
CryptoMaterial::Validate
virtual bool Validate(RandomNumberGenerator &rng, unsigned int level) const =0
Check this object for errors.
CryptoParameters
Interface for crypto parameters.
Definition cryptlib.h:2551
DH2
Unified Diffie-Hellman in GF(p).
Definition dh2.h:21
DH2::Agree
bool Agree(byte *agreedValue, const byte *staticPrivateKey, const byte *ephemeralPrivateKey, const byte *staticOtherPublicKey, const byte *ephemeralOtherPublicKey, bool validateStaticOtherPublicKey=true) const
Derive agreed value.
Definition dh2.cpp:60
NameValuePairs::GetVoidValue
virtual CRYPTOPP_DLL bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const =0
Get a named value.
cryptlib.h
Abstract base classes that provide a uniform interface to this library.
dh2.h
Classes for Unified Diffie-Hellman key exchange.
misc.h
Utility functions for the Crypto++ library.
CryptoPP
Crypto++ library namespace.
pch.h
Precompiled header file.