60 lines
1.9 KiB
Java
60 lines
1.9 KiB
Java
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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import org.mozilla.jss.*;
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import org.mozilla.jss.crypto.*;
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/**
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* A command-line utility for generating PQG parameters for DSA
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* Key operations. Can be used for testing.
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* Takes the keysize as the sole argument.
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*/
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public class PQGGen {
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public static void main(String args[]) {
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int size;
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PQGParams pqg;
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try {
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if(args.length != 1) {
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throw new Exception("Usage: java PQGGen <keysize>");
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}
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size = Integer.parseInt(args[0]);
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System.out.println("Generating PQG parameters for "+size+
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"-bit keypairs. This could take hours...");
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CryptoManager.initialize(".");
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pqg = PQGParams.generate(size);
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System.out.println("Generated PQG Parameters.");
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System.out.println("Verifying PQG Parameters. "+
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"This could take a few minutes...");
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if( ! pqg.paramsAreValid() ) {
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throw new Exception("ERROR: Generated parameters are invalid.");
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}
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System.out.println("Parameters are valid!");
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System.out.println("P: "+pqg.getP());
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System.out.println("Q: "+pqg.getQ());
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System.out.println("G: "+pqg.getG());
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System.out.println("H: "+pqg.getH());
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System.out.println("seed: "+pqg.getSeed());
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System.out.println("counter: "+pqg.getCounter());
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} catch(NumberFormatException e) {
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System.err.println("Invalid key size: "+e);
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} catch(PQGParamGenException e) {
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System.err.println(e);
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} catch(java.security.InvalidParameterException e) {
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System.err.println("Invalid key size: "+e);
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} catch(Exception e) {
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System.err.println(e);
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}
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}
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}
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