private static void startSession() {
Session session = Session.getInstance(true);
Pair<BigInteger, BigInteger> privateKeys = session.getPrivateKey();
System.out.println("");
System.out.println("Private key x: " + privateKeys.getFirst());
System.out.println("Private key y: " + privateKeys.getSecond());
System.out.println("");
System.out.println("Please introduce message to sign:");
String text = null;
while (text == null) {
try {
text = (new BufferedReader(new InputStreamReader(System.in))).readLine();
} catch (IOException e) {
e.printStackTrace();
}
}
Pair<BigInteger, BigInteger> signature =
DSA.sign(
true,
text,
session.getGlobalKeyG(),
session.getGlobalKeyP(),
session.getGlobalKeyQ(),
privateKeys.getFirst());
System.out.println(
"Signature (r,s): (" + signature.getFirst() + ", " + signature.getSecond() + ")");
System.out.println("");
System.out.println("Do you want to verify a message?");
System.out.println(" 1.Yes (y)");
System.out.println(" 2.No (press enter)");
String alg = null;
try {
alg = (new BufferedReader(new InputStreamReader(System.in))).readLine();
} catch (IOException e) {
e.printStackTrace();
}
switch (alg) {
case "y":
verifyMessage();
break;
default:
System.out.println("Bye!");
System.exit(1);
break;
}
}
