Examples with DSAParameters com.github.zhenwei.core.crypto.params.DSAParameters used on opensource projects

Example 1 with DSAParameters

use of com.github.zhenwei.core.crypto.params.DSAParameters in project LinLong-Java by zhenwei1108.

the class DSASigner method verifySignature.

/**
 * return true if the value r and s represent a DSA signature for the passed in message for
 * standard DSA the message should be a SHA-1 hash of the real message to be verified.
 */
public boolean verifySignature(byte[] message, BigInteger r, BigInteger s) {
    DSAParameters params = key.getParameters();
    BigInteger q = params.getQ();
    BigInteger m = calculateE(q, message);
    BigInteger zero = BigInteger.valueOf(0);
    if (zero.compareTo(r) >= 0 || q.compareTo(r) <= 0) {
        return false;
    }
    if (zero.compareTo(s) >= 0 || q.compareTo(s) <= 0) {
        return false;
    }
    BigInteger w = BigIntegers.modOddInverseVar(q, s);
    BigInteger u1 = m.multiply(w).mod(q);
    BigInteger u2 = r.multiply(w).mod(q);
    BigInteger p = params.getP();
    u1 = params.getG().modPow(u1, p);
    u2 = ((DSAPublicKeyParameters) key).getY().modPow(u2, p);
    BigInteger v = u1.multiply(u2).mod(p).mod(q);
    return v.equals(r);
}

Example 2 with DSAParameters

use of com.github.zhenwei.core.crypto.params.DSAParameters in project LinLong-Java by zhenwei1108.

the class DSASigner method generateSignature.

/**
 * generate a signature for the given message using the key we were initialised with. For
 * conventional DSA the message should be a SHA-1 hash of the message of interest.
 *
 * @param message the message that will be verified later.
 */
public BigInteger[] generateSignature(byte[] message) {
    DSAParameters params = key.getParameters();
    BigInteger q = params.getQ();
    BigInteger m = calculateE(q, message);
    BigInteger x = ((DSAPrivateKeyParameters) key).getX();
    if (kCalculator.isDeterministic()) {
        kCalculator.init(q, x, message);
    } else {
        kCalculator.init(q, random);
    }
    BigInteger k = kCalculator.nextK();
    // the randomizer is to conceal timing information related to k and x.
    BigInteger r = params.getG().modPow(k.add(getRandomizer(q, random)), params.getP()).mod(q);
    k = BigIntegers.modOddInverse(q, k).multiply(m.add(x.multiply(r)));
    BigInteger s = k.mod(q);
    return new BigInteger[] { r, s };
}

Example 3 with DSAParameters

use of com.github.zhenwei.core.crypto.params.DSAParameters in project LinLong-Java by zhenwei1108.

the class PrivateKeyInfoFactory method createPrivateKeyInfo.

/**
 * Create a PrivateKeyInfo representation of a private key with attributes.
 *
 * @param privateKey the key to be encoded into the info object.
 * @param attributes the set of attributes to be included.
 * @return the appropriate PrivateKeyInfo
 * @throws IOException on an error encoding the key
 */
public static PrivateKeyInfo createPrivateKeyInfo(AsymmetricKeyParameter privateKey, ASN1Set attributes) throws IOException {
    if (privateKey instanceof RSAKeyParameters) {
        RSAPrivateCrtKeyParameters priv = (RSAPrivateCrtKeyParameters) privateKey;
        return new PrivateKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE), new RSAPrivateKey(priv.getModulus(), priv.getPublicExponent(), priv.getExponent(), priv.getP(), priv.getQ(), priv.getDP(), priv.getDQ(), priv.getQInv()), attributes);
    } else if (privateKey instanceof DSAPrivateKeyParameters) {
        DSAPrivateKeyParameters priv = (DSAPrivateKeyParameters) privateKey;
        DSAParameters params = priv.getParameters();
        return new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_dsa, new DSAParameter(params.getP(), params.getQ(), params.getG())), new ASN1Integer(priv.getX()), attributes);
    } else if (privateKey instanceof ECPrivateKeyParameters) {
        ECPrivateKeyParameters priv = (ECPrivateKeyParameters) privateKey;
        ECDomainParameters domainParams = priv.getParameters();
        ASN1Encodable params;
        int orderBitLength;
        if (domainParams == null) {
            // Implicitly CA
            params = new X962Parameters(DERNull.INSTANCE);
            orderBitLength = priv.getD().bitLength();
        } else if (domainParams instanceof ECGOST3410Parameters) {
            GOST3410PublicKeyAlgParameters gostParams = new GOST3410PublicKeyAlgParameters(((ECGOST3410Parameters) domainParams).getPublicKeyParamSet(), ((ECGOST3410Parameters) domainParams).getDigestParamSet(), ((ECGOST3410Parameters) domainParams).getEncryptionParamSet());
            int size;
            ASN1ObjectIdentifier identifier;
            if (cryptoProOids.contains(gostParams.getPublicKeyParamSet())) {
                size = 32;
                identifier = CryptoProObjectIdentifiers.gostR3410_2001;
            } else {
                boolean is512 = priv.getD().bitLength() > 256;
                identifier = (is512) ? RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512 : RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256;
                size = (is512) ? 64 : 32;
            }
            byte[] encKey = new byte[size];
            extractBytes(encKey, size, 0, priv.getD());
            return new PrivateKeyInfo(new AlgorithmIdentifier(identifier, gostParams), new DEROctetString(encKey));
        } else if (domainParams instanceof ECNamedDomainParameters) {
            params = new X962Parameters(((ECNamedDomainParameters) domainParams).getName());
            orderBitLength = domainParams.getN().bitLength();
        } else {
            X9ECParameters ecP = new X9ECParameters(domainParams.getCurve(), new X9ECPoint(domainParams.getG(), false), domainParams.getN(), domainParams.getH(), domainParams.getSeed());
            params = new X962Parameters(ecP);
            orderBitLength = domainParams.getN().bitLength();
        }
        ECPoint q = new FixedPointCombMultiplier().multiply(domainParams.getG(), priv.getD());
        // TODO Support point compression
        DERBitString publicKey = new DERBitString(q.getEncoded(false));
        return new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params), new ECPrivateKey(orderBitLength, priv.getD(), publicKey, params), attributes);
    } else if (privateKey instanceof X448PrivateKeyParameters) {
        X448PrivateKeyParameters key = (X448PrivateKeyParameters) privateKey;
        return new PrivateKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_X448), new DEROctetString(key.getEncoded()), attributes, key.generatePublicKey().getEncoded());
    } else if (privateKey instanceof X25519PrivateKeyParameters) {
        X25519PrivateKeyParameters key = (X25519PrivateKeyParameters) privateKey;
        return new PrivateKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_X25519), new DEROctetString(key.getEncoded()), attributes, key.generatePublicKey().getEncoded());
    } else if (privateKey instanceof Ed448PrivateKeyParameters) {
        Ed448PrivateKeyParameters key = (Ed448PrivateKeyParameters) privateKey;
        return new PrivateKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_Ed448), new DEROctetString(key.getEncoded()), attributes, key.generatePublicKey().getEncoded());
    } else if (privateKey instanceof Ed25519PrivateKeyParameters) {
        Ed25519PrivateKeyParameters key = (Ed25519PrivateKeyParameters) privateKey;
        return new PrivateKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_Ed25519), new DEROctetString(key.getEncoded()), attributes, key.generatePublicKey().getEncoded());
    } else {
        throw new IOException("key parameters not recognized");
    }
}

Example 4 with DSAParameters

use of com.github.zhenwei.core.crypto.params.DSAParameters in project LinLong-Java by zhenwei1108.

the class OpenSSHPublicKeyUtil method parsePublicKey.

/**
 * Parse a public key from an SSHBuffer instance.
 *
 * @param buffer containing the SSH public key.
 * @return A CipherParameters instance.
 */
public static AsymmetricKeyParameter parsePublicKey(SSHBuffer buffer) {
    AsymmetricKeyParameter result = null;
    String magic = buffer.readString();
    if (RSA.equals(magic)) {
        BigInteger e = buffer.readBigNumPositive();
        BigInteger n = buffer.readBigNumPositive();
        result = new RSAKeyParameters(false, n, e);
    } else if (DSS.equals(magic)) {
        BigInteger p = buffer.readBigNumPositive();
        BigInteger q = buffer.readBigNumPositive();
        BigInteger g = buffer.readBigNumPositive();
        BigInteger pubKey = buffer.readBigNumPositive();
        result = new DSAPublicKeyParameters(pubKey, new DSAParameters(p, q, g));
    } else if (magic.startsWith(ECDSA)) {
        String curveName = buffer.readString();
        ASN1ObjectIdentifier oid = SSHNamedCurves.getByName(curveName);
        X9ECParameters x9ECParameters = SSHNamedCurves.getParameters(oid);
        if (x9ECParameters == null) {
            throw new IllegalStateException("unable to find curve for " + magic + " using curve name " + curveName);
        }
        ECCurve curve = x9ECParameters.getCurve();
        byte[] pointRaw = buffer.readBlock();
        result = new ECPublicKeyParameters(curve.decodePoint(pointRaw), new ECNamedDomainParameters(oid, x9ECParameters));
    } else if (ED_25519.equals(magic)) {
        byte[] pubKeyBytes = buffer.readBlock();
        if (pubKeyBytes.length != Ed25519PublicKeyParameters.KEY_SIZE) {
            throw new IllegalStateException("public key value of wrong length");
        }
        result = new Ed25519PublicKeyParameters(pubKeyBytes, 0);
    }
    if (result == null) {
        throw new IllegalArgumentException("unable to parse key");
    }
    if (buffer.hasRemaining()) {
        throw new IllegalArgumentException("decoded key has trailing data");
    }
    return result;
}

Example 5 with DSAParameters

use of com.github.zhenwei.core.crypto.params.DSAParameters in project LinLong-Java by zhenwei1108.

the class AlgorithmParameterGeneratorSpi method engineGenerateParameters.

protected AlgorithmParameters engineGenerateParameters() {
    DSAParametersGenerator pGen;
    if (strength <= 1024) {
        pGen = new DSAParametersGenerator();
    } else {
        pGen = new DSAParametersGenerator(new SHA256Digest());
    }
    if (random == null) {
        random = CryptoServicesRegistrar.getSecureRandom();
    }
    int certainty = PrimeCertaintyCalculator.getDefaultCertainty(strength);
    if (strength == 1024) {
        params = new DSAParameterGenerationParameters(1024, 160, certainty, random);
        pGen.init(params);
    } else if (strength > 1024) {
        params = new DSAParameterGenerationParameters(strength, 256, certainty, random);
        pGen.init(params);
    } else {
        pGen.init(strength, certainty, random);
    }
    DSAParameters p = pGen.generateParameters();
    AlgorithmParameters params;
    try {
        params = createParametersInstance("DSA");
        params.init(new DSAParameterSpec(p.getP(), p.getQ(), p.getG()));
    } catch (Exception e) {
        throw new RuntimeException(e.getMessage());
    }
    return params;
}