use of com.github.zhenwei.core.crypto.params.GOST3410PrivateKeyParameters in project LinLong-Java by zhenwei1108.
the class GOST3410KeyPairGenerator method generateKeyPair.
public AsymmetricCipherKeyPair generateKeyPair() {
BigInteger p, q, a, x, y;
GOST3410Parameters GOST3410Params = param.getParameters();
SecureRandom random = param.getRandom();
q = GOST3410Params.getQ();
p = GOST3410Params.getP();
a = GOST3410Params.getA();
int minWeight = 64;
for (; ; ) {
x = BigIntegers.createRandomBigInteger(256, random);
if (x.signum() < 1 || x.compareTo(q) >= 0) {
continue;
}
if (WNafUtil.getNafWeight(x) < minWeight) {
continue;
}
break;
}
//
// calculate the public key.
//
y = a.modPow(x, p);
return new AsymmetricCipherKeyPair(new GOST3410PublicKeyParameters(y, GOST3410Params), new GOST3410PrivateKeyParameters(x, GOST3410Params));
}
use of com.github.zhenwei.core.crypto.params.GOST3410PrivateKeyParameters in project LinLong-Java by zhenwei1108.
the class KeyPairGeneratorSpi method generateKeyPair.
public KeyPair generateKeyPair() {
if (!initialised) {
init(new GOST3410ParameterSpec(CryptoProObjectIdentifiers.gostR3410_94_CryptoPro_A.getId()), CryptoServicesRegistrar.getSecureRandom());
}
AsymmetricCipherKeyPair pair = engine.generateKeyPair();
GOST3410PublicKeyParameters pub = (GOST3410PublicKeyParameters) pair.getPublic();
GOST3410PrivateKeyParameters priv = (GOST3410PrivateKeyParameters) pair.getPrivate();
return new KeyPair(new BCGOST3410PublicKey(pub, gost3410Params), new BCGOST3410PrivateKey(priv, gost3410Params));
}
use of com.github.zhenwei.core.crypto.params.GOST3410PrivateKeyParameters in project LinLong-Java by zhenwei1108.
the class GOST3410Util method generatePrivateKeyParameter.
public static AsymmetricKeyParameter generatePrivateKeyParameter(PrivateKey key) throws InvalidKeyException {
if (key instanceof GOST3410PrivateKey) {
GOST3410PrivateKey k = (GOST3410PrivateKey) key;
GOST3410PublicKeyParameterSetSpec p = k.getParameters().getPublicKeyParameters();
return new GOST3410PrivateKeyParameters(k.getX(), new GOST3410Parameters(p.getP(), p.getQ(), p.getA()));
}
throw new InvalidKeyException("can't identify GOST3410 private key.");
}
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