Examples with DSAParameterSpec java.security.spec.DSAParameterSpec used on opensource projects

Example 16 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project jdk8u_jdk by JetBrains.

the class DSAPrivateKey method getParams.

/**
     * Returns the DSA parameters associated with this key, or null if the
     * parameters could not be parsed.
     */
public DSAParams getParams() {
    try {
        if (algid instanceof DSAParams) {
            return (DSAParams) algid;
        } else {
            DSAParameterSpec paramSpec;
            AlgorithmParameters algParams = algid.getParameters();
            if (algParams == null) {
                return null;
            }
            paramSpec = algParams.getParameterSpec(DSAParameterSpec.class);
            return (DSAParams) paramSpec;
        }
    } catch (InvalidParameterSpecException e) {
        return null;
    }
}

Example 17 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project jdk8u_jdk by JetBrains.

the class DSAPublicKey method getParams.

/**
     * Returns the DSA parameters associated with this key, or null if the
     * parameters could not be parsed.
     */
public DSAParams getParams() {
    try {
        if (algid instanceof DSAParams) {
            return (DSAParams) algid;
        } else {
            DSAParameterSpec paramSpec;
            AlgorithmParameters algParams = algid.getParameters();
            if (algParams == null) {
                return null;
            }
            paramSpec = algParams.getParameterSpec(DSAParameterSpec.class);
            return (DSAParams) paramSpec;
        }
    } catch (InvalidParameterSpecException e) {
        return null;
    }
}

Example 18 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project jdk8u_jdk by JetBrains.

the class TestDSAGenParameterSpec method checkParam.

private static void checkParam(AlgorithmParameters param, DSAGenParameterSpec genParam) throws InvalidParameterSpecException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException {
    String algorithm = param.getAlgorithm();
    if (!algorithm.equalsIgnoreCase(ALGORITHM_NAME)) {
        throw new RuntimeException("Unexpected type of parameters: " + algorithm);
    }
    DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class);
    int valueL = spec.getP().bitLength();
    int strengthP = genParam.getPrimePLength();
    if (strengthP != valueL) {
        System.out.printf("P: Expected %d but actual %d%n", strengthP, valueL);
        throw new RuntimeException("Wrong P strength");
    }
    int valueN = spec.getQ().bitLength();
    int strengthQ = genParam.getSubprimeQLength();
    if (strengthQ != valueN) {
        System.out.printf("Q: Expected %d but actual %d%n", strengthQ, valueN);
        throw new RuntimeException("Wrong Q strength");
    }
    if (genParam.getSubprimeQLength() != genParam.getSeedLength()) {
        System.out.println("Defaut seed length should be the same as Q.");
        throw new RuntimeException("Wrong seed length");
    }
    // use the parameters to generate real DSA keys
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(ALGORITHM_NAME, PROVIDER_NAME);
    keyGen.initialize(spec);
    keyGen.generateKeyPair();
}

Example 19 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project xipki by xipki.

the class KeyUtil method generateDSAKeypair.

// CHECKSTYLE:SKIP
public static KeyPair generateDSAKeypair(DSAParameters dsaParams, SecureRandom random) throws NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException {
    DSAParameterSpec dsaParamSpec = new DSAParameterSpec(dsaParams.getP(), dsaParams.getQ(), dsaParams.getG());
    KeyPairGenerator kpGen = getKeyPairGenerator("DSA");
    synchronized (kpGen) {
        kpGen.initialize(dsaParamSpec, random);
        return kpGen.generateKeyPair();
    }
}

Example 20 with DSAParameterSpec

use of java.security.spec.DSAParameterSpec in project xipki by xipki.

the class KeyUtil method generateDSAKeypair.

// CHECKSTYLE:SKIP
public static KeyPair generateDSAKeypair(int plength, int qlength, SecureRandom random) throws NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException {
    DSAParameterSpec dsaParamSpec = DSAParameterCache.getDSAParameterSpec(plength, qlength, random);
    KeyPairGenerator kpGen = getKeyPairGenerator("DSA");
    synchronized (kpGen) {
        kpGen.initialize(dsaParamSpec, random);
        return kpGen.generateKeyPair();
    }
}