Example usage for org.bouncycastle.jce.spec ElGamalParameterSpec getG

Introduction

In this page you can find the example usage for org.bouncycastle.jce.spec ElGamalParameterSpec getG.

Prototype

public BigInteger getG() 

Source Link

Document

Returns the base generator g.

Usage

From source file:SELSKeyGen.java

License:Open Source License

public static void initPGQ() throws Exception {
    String paramFile = SELS_LIST_PATH + "/params.gpg";
    File file = new File(paramFile);
    if (file.exists()) {
        PGPPublicKey pgpPubKey = readPublicKey(new FileInputStream(paramFile));
        JCEElGamalPublicKey pubKey = (JCEElGamalPublicKey) pgpPubKey.getKey("BC");
        ElGamalParameterSpec spec = pubKey.getParameters();
        p = spec.getP();//www  .j a v  a  2  s  .c o  m
        g = spec.getG();
        orderQ = p.bitLength() / 8;
        paramFlag = 1;

        System.out.println("P: = " + p.toString());
        System.out.println("G: = " + g.toString());

    } // end if
    else {
        paramFile = SELS_LIST_PATH + "/params";
        BufferedReader in = new BufferedReader(new FileReader(paramFile));

        while (true) {
            String line = in.readLine();
            if (line == null)
                break;
            String wlist[] = line.split("\\s");

            if (wlist[0].equals("g:"))
                g = new BigInteger(wlist[1]);
            else if (wlist[0].equals("p:"))
                p = new BigInteger(wlist[1]);
            else if (wlist[0].equals("q:"))
                q = new BigInteger(wlist[1]);
        } // end while
        orderQ = q.bitLength() / 8;
        paramFlag = 0;

    } // end else

}

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From source file:genkeys.java

License:Open Source License

private static PublicKeyPacket publicKeyPacket(PublicKey key, int algorithm, Date time) throws PGPException {
    BCPGKey bcpgKey;//from  w  ww  .j a v a 2  s .c om
    if (key instanceof RSAPublicKey) {
        RSAPublicKey rK = (RSAPublicKey) key;
        bcpgKey = new RSAPublicBCPGKey(rK.getModulus(), rK.getPublicExponent());
    } else if (key instanceof DSAPublicKey) {
        DSAPublicKey dK = (DSAPublicKey) key;
        DSAParams dP = dK.getParams();
        bcpgKey = new DSAPublicBCPGKey(dP.getP(), dP.getQ(), dP.getG(), dK.getY());
    } else if (key instanceof ElGamalPublicKey) {
        ElGamalPublicKey eK = (ElGamalPublicKey) key;
        ElGamalParameterSpec eS = eK.getParameters();
        bcpgKey = new ElGamalPublicBCPGKey(eS.getP(), eS.getG(), eK.getY());
    } else {
        throw new PGPException("unknown key class");
    }

    return new PublicKeyPacket(algorithm, time, bcpgKey);
}

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