Examples with DSAPublicKey java.security.interfaces.DSAPublicKey used on opensource projects

Example 31 with DSAPublicKey

use of java.security.interfaces.DSAPublicKey in project jdk8u_jdk by JetBrains.

the class BasicChecker method makeInheritedParamsKey.

/**
     * Internal method to create a new key with inherited key parameters.
     *
     * @param keyValueKey key from which to obtain key value
     * @param keyParamsKey key from which to obtain key parameters
     * @return new public key having value and parameters
     * @throws CertPathValidatorException if keys are not appropriate types
     * for this operation
     */
static PublicKey makeInheritedParamsKey(PublicKey keyValueKey, PublicKey keyParamsKey) throws CertPathValidatorException {
    if (!(keyValueKey instanceof DSAPublicKey) || !(keyParamsKey instanceof DSAPublicKey))
        throw new CertPathValidatorException("Input key is not " + "appropriate type for " + "inheriting parameters");
    DSAParams params = ((DSAPublicKey) keyParamsKey).getParams();
    if (params == null)
        throw new CertPathValidatorException("Key parameters missing");
    try {
        BigInteger y = ((DSAPublicKey) keyValueKey).getY();
        KeyFactory kf = KeyFactory.getInstance("DSA");
        DSAPublicKeySpec ks = new DSAPublicKeySpec(y, params.getP(), params.getQ(), params.getG());
        return kf.generatePublic(ks);
    } catch (GeneralSecurityException e) {
        throw new CertPathValidatorException("Unable to generate key with" + " inherited parameters: " + e.getMessage(), e);
    }
}