C++ (Cpp) DHParameters::getXBitLength Beispiele

Beispiel #1

Datei: BotanDH.cpp Projekt: bellgrim/SoftHSMv2

// Key factory
bool BotanDH::generateKeyPair(AsymmetricKeyPair** ppKeyPair, AsymmetricParameters* parameters, RNG* /*rng = NULL */)
{
	// Check parameters
	if ((ppKeyPair == NULL) ||
	    (parameters == NULL))
	{
		return false;
	}

	if (!parameters->areOfType(DHParameters::type))
	{
		ERROR_MSG("Invalid parameters supplied for DH key generation");

		return false;
	}

	DHParameters* params = (DHParameters*) parameters;

	// Generate the key-pair
	BotanDH_PrivateKey* dh = NULL;
	try
	{
		BotanRNG* rng = (BotanRNG*)BotanCryptoFactory::i()->getRNG();

		// PKCS#3: 2^(l-1) <= x < 2^l
		Botan::BigInt x;
		if (params->getXBitLength() > 0)
		{
			x.randomize(*rng->getRNG(), params->getXBitLength());
		}

		dh = new BotanDH_PrivateKey(*rng->getRNG(),
					Botan::DL_Group(BotanUtil::byteString2bigInt(params->getP()),
					BotanUtil::byteString2bigInt(params->getG())),
					x);
	}
	catch (std::exception& e)
	{
		ERROR_MSG("DH key generation failed with %s", e.what());

		return false;
	}

	// Create an asymmetric key-pair object to return
	BotanDHKeyPair* kp = new BotanDHKeyPair();

	((BotanDHPublicKey*) kp->getPublicKey())->setFromBotan(dh);
	((BotanDHPrivateKey*) kp->getPrivateKey())->setFromBotan(dh);

	*ppKeyPair = kp;

	// Release the key
	delete dh;

	return true;
}

Beispiel #2

Datei: DHTests.cpp Projekt: bluelikeme/SoftHSMv2

void DHTests::testSerialisation()
{
	// Generate 1024-bit parameters for testing
	DHParameters* p;
	AsymmetricParameters** ap = (AsymmetricParameters**) &p;

	//CPPUNIT_ASSERT(dh->generateParameters(ap, (void*) 1024));
	// changed for 512-bit for speed...
#ifndef WITH_BOTAN
	CPPUNIT_ASSERT(dh->generateParameters(ap, (void*) 1024));
#else
	CPPUNIT_ASSERT(dh->generateParameters(ap, (void*) 512));
#endif

	// Set a fixed private value length
	p->setXBitLength(128);

	// Serialise the parameters
	ByteString serialisedParams = p->serialise();

	// Deserialise the parameters
	AsymmetricParameters* dP;

	CPPUNIT_ASSERT(dh->reconstructParameters(&dP, serialisedParams));

	CPPUNIT_ASSERT(dP->areOfType(DHParameters::type));

	DHParameters* ddP = (DHParameters*) dP;

	CPPUNIT_ASSERT(p->getP() == ddP->getP());
	CPPUNIT_ASSERT(p->getG() == ddP->getG());
	CPPUNIT_ASSERT(p->getXBitLength() == ddP->getXBitLength());

	// Generate a key-pair
	AsymmetricKeyPair* kp;

	CPPUNIT_ASSERT(dh->generateKeyPair(&kp, dP));

	// Serialise the key-pair
	ByteString serialisedKP = kp->serialise();

	// Deserialise the key-pair
	AsymmetricKeyPair* dKP;

	CPPUNIT_ASSERT(dh->reconstructKeyPair(&dKP, serialisedKP));

	// Check the deserialised key-pair
	DHPrivateKey* privKey = (DHPrivateKey*) kp->getPrivateKey();
	DHPublicKey* pubKey = (DHPublicKey*) kp->getPublicKey();

	DHPrivateKey* dPrivKey = (DHPrivateKey*) dKP->getPrivateKey();
	DHPublicKey* dPubKey = (DHPublicKey*) dKP->getPublicKey();

	CPPUNIT_ASSERT(privKey->getP() == dPrivKey->getP());
	CPPUNIT_ASSERT(privKey->getG() == dPrivKey->getG());
	CPPUNIT_ASSERT(privKey->getX() == dPrivKey->getX());

	CPPUNIT_ASSERT(pubKey->getP() == dPubKey->getP());
	CPPUNIT_ASSERT(pubKey->getG() == dPubKey->getG());
	CPPUNIT_ASSERT(pubKey->getY() == dPubKey->getY());

	dh->recycleParameters(p);
	dh->recycleParameters(dP);
	dh->recycleKeyPair(kp);
	dh->recycleKeyPair(dKP);
}