Examples with RSAKeyParameters org.bouncycastle.crypto.params.RSAKeyParameters used on opensource projects

Example 11 with RSAKeyParameters

use of org.bouncycastle.crypto.params.RSAKeyParameters in project jruby-openssl by jruby.

the class PKCS10Request method generatePublicKey.

public PublicKey generatePublicKey() throws NoSuchAlgorithmException, InvalidKeySpecException, IOException {
    AsymmetricKeyParameter keyParams = PublicKeyFactory.createKey(publicKeyInfo);
    final KeySpec keySpec;
    final KeyFactory keyFactory;
    if (keyParams instanceof RSAKeyParameters) {
        RSAKeyParameters rsa = (RSAKeyParameters) keyParams;
        keySpec = new RSAPublicKeySpec(rsa.getModulus(), rsa.getExponent());
        keyFactory = SecurityHelper.getKeyFactory("RSA");
        return keyFactory.generatePublic(keySpec);
    } else if (keyParams instanceof DSAPublicKeyParameters) {
        DSAPublicKeyParameters dsa = (DSAPublicKeyParameters) keyParams;
        DSAParameters params = dsa.getParameters();
        keySpec = new DSAPublicKeySpec(dsa.getY(), params.getP(), params.getQ(), params.getG());
        keyFactory = SecurityHelper.getKeyFactory("DSA");
        return keyFactory.generatePublic(keySpec);
    } else if (keyParams instanceof ECPublicKeyParameters) {
        ECPublicKeyParameters ec = (ECPublicKeyParameters) keyParams;
        ECDomainParameters ecParams = ec.getParameters();
        ECParameterSpec params = new ECParameterSpec(ecParams.getCurve(), ecParams.getG(), ecParams.getN(), ecParams.getH(), ecParams.getSeed());
        // NOTE: likely to fail if non BC factory picked up :
        keySpec = new ECPublicKeySpec(ec.getQ(), params);
        keyFactory = SecurityHelper.getKeyFactory("EC");
        return keyFactory.generatePublic(keySpec);
    } else {
        throw new IllegalStateException("could not generate public key for request, params type: " + keyParams);
    }
}