private static DHParameters fromSafeP(String hexP) { BigInteger p = fromHex(hexP), q = p.shiftRight(1); return new DHParameters(p, TWO, q); }
private static DHParameters rfc7919Parameters(String hexP, int l) { // NOTE: All the groups in RFC 7919 use safe primes, i.e. q = (p-1)/2, and generator g = 2 BigInteger p = fromHex(hexP); return new DHParameters(p, TWO, p.shiftRight(1), l); }
BCDHPublicKey( BigInteger y, DHParameterSpec dhSpec) { this.y = y; this.dhSpec = dhSpec; this.dhPublicKey = new DHPublicKeyParameters(y, new DHParameters(dhSpec.getP(), dhSpec.getG())); }
private static DHParameters fromPG(String hexP, String hexG) { return new DHParameters(fromHex(hexP), fromHex(hexG)); }
BCDHPublicKey( DHPublicKey key) { this.y = key.getY(); this.dhSpec = key.getParams(); this.dhPublicKey = new DHPublicKeyParameters(y, new DHParameters(dhSpec.getP(), dhSpec.getG())); }
private static DHParameters fromPGQ(String hexP, String hexG, String hexQ) { return new DHParameters(fromHex(hexP), fromHex(hexG), fromHex(hexQ)); }
public void initialize( AlgorithmParameterSpec params, SecureRandom random) throws InvalidAlgorithmParameterException { if (!(params instanceof DHParameterSpec)) { throw new InvalidAlgorithmParameterException("parameter object not a DHParameterSpec"); } DHParameterSpec dhParams = (DHParameterSpec)params; param = new DHKeyGenerationParameters(random, new DHParameters(dhParams.getP(), dhParams.getG(), null, dhParams.getL())); engine.init(param); initialised = true; }
public void initialize( AlgorithmParameterSpec params, SecureRandom random) throws InvalidAlgorithmParameterException { if (!(params instanceof DHParameterSpec)) { throw new InvalidAlgorithmParameterException("parameter object not a DHParameterSpec"); } DHParameterSpec dhParams = (DHParameterSpec)params; param = new DHKeyGenerationParameters(random, new DHParameters(dhParams.getP(), dhParams.getG(), null, dhParams.getL())); engine.init(param); initialised = true; }
BCDHPublicKey( DHPublicKeySpec spec) { this.y = spec.getY(); this.dhSpec = new DHParameterSpec(spec.getP(), spec.getG()); this.dhPublicKey = new DHPublicKeyParameters(y, new DHParameters(spec.getP(), spec.getG())); }
public static DHParameters getParameters(TlsDHConfig dhConfig) { DHGroup dhGroup = TlsDHUtils.getDHGroup(dhConfig); if (dhGroup == null) { throw new IllegalArgumentException("No DH configuration provided"); } return new DHParameters(dhGroup.getP(), dhGroup.getG(), dhGroup.getQ(), dhGroup.getL()); }
static public AsymmetricKeyParameter generatePublicKeyParameter( PublicKey key) throws InvalidKeyException { if (key instanceof DHPublicKey) { DHPublicKey k = (DHPublicKey)key; return new DHPublicKeyParameters(k.getY(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL())); } throw new InvalidKeyException("can't identify DH public key."); }
static public AsymmetricKeyParameter generatePublicKeyParameter( PublicKey key) throws InvalidKeyException { if (key instanceof DHPublicKey) { DHPublicKey k = (DHPublicKey)key; return new DHPublicKeyParameters(k.getY(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL())); } throw new InvalidKeyException("can't identify DH public key."); }
static public AsymmetricKeyParameter generatePublicKeyParameter( PublicKey key) throws InvalidKeyException { if (key instanceof DHPublicKey) { DHPublicKey k = (DHPublicKey)key; return new DHPublicKeyParameters(k.getY(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL())); } throw new InvalidKeyException("can't identify DH public key."); }
static public AsymmetricKeyParameter generatePrivateKeyParameter( PrivateKey key) throws InvalidKeyException { if (key instanceof DHPrivateKey) { DHPrivateKey k = (DHPrivateKey)key; return new DHPrivateKeyParameters(k.getX(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL())); } throw new InvalidKeyException("can't identify DH private key."); } }
static public AsymmetricKeyParameter generatePrivateKeyParameter( PrivateKey key) throws InvalidKeyException { if (key instanceof DHPrivateKey) { DHPrivateKey k = (DHPrivateKey)key; return new DHPrivateKeyParameters(k.getX(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL())); } throw new InvalidKeyException("can't identify DH private key."); } }
static public AsymmetricKeyParameter generatePrivateKeyParameter( PrivateKey key) throws InvalidKeyException { if (key instanceof DHPrivateKey) { DHPrivateKey k = (DHPrivateKey)key; return new DHPrivateKeyParameters(k.getX(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL())); } throw new InvalidKeyException("can't identify DH private key."); } }
static public AsymmetricKeyParameter generatePrivateKeyParameter( PrivateKey key) throws InvalidKeyException { if (key instanceof DHPrivateKey) { DHPrivateKey k = (DHPrivateKey)key; return new DHPrivateKeyParameters(k.getX(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL())); } throw new InvalidKeyException("can't identify DH private key."); } }
static public AsymmetricKeyParameter generatePublicKeyParameter( PublicKey key) throws InvalidKeyException { if (key instanceof BCDHPublicKey) { return ((BCDHPublicKey)key).engineGetKeyParameters(); } if (key instanceof DHPublicKey) { DHPublicKey k = (DHPublicKey)key; return new DHPublicKeyParameters(k.getY(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL())); } throw new InvalidKeyException("can't identify DH public key."); }
public AsymmetricCipherKeyPair generateKeyPair() { DHKeyGeneratorHelper helper = DHKeyGeneratorHelper.INSTANCE; ElGamalParameters egp = param.getParameters(); DHParameters dhp = new DHParameters(egp.getP(), egp.getG(), null, egp.getL()); BigInteger x = helper.calculatePrivate(dhp, param.getRandom()); BigInteger y = helper.calculatePublic(dhp, x); return new AsymmetricCipherKeyPair( new ElGamalPublicKeyParameters(y, egp), new ElGamalPrivateKeyParameters(x, egp)); } }
public AsymmetricCipherKeyPair generateKeyPair() { DHKeyGeneratorHelper helper = DHKeyGeneratorHelper.INSTANCE; ElGamalParameters egp = param.getParameters(); DHParameters dhp = new DHParameters(egp.getP(), egp.getG(), null, egp.getL()); BigInteger x = helper.calculatePrivate(dhp, param.getRandom()); BigInteger y = helper.calculatePublic(dhp, x); return new AsymmetricCipherKeyPair( new ElGamalPublicKeyParameters(y, egp), new ElGamalPrivateKeyParameters(x, egp)); } }