public AsymmetricCipherKeyPair getKeyPair(
int keySize, String algorithm, String RNGAlgorithm, String RNGProvider) {
AsymmetricCipherKeyPair pair = serverKeys.get(algorithm);
if (pair != null) {
return pair;
}
if (provider == null) {
return pair;
}
SecureRandom secureRandom = getSecureRandom(RNGAlgorithm, RNGProvider);
if (secureRandom == null) {
return null;
}
AsymmetricCipherKeyPairGenerator generator = getGenerator(algorithm);
if (generator == null) {
return null;
}
initGenerator(keySize, algorithm, generator, secureRandom);
AsymmetricCipherKeyPair newPair = generator.generateKeyPair();
AsymmetricCipherKeyPair oldPair = serverKeys.putIfAbsent(algorithm, newPair);
if (oldPair != null) {
return oldPair;
}
return newPair;
}
public void initGenerator(
int keySize,
String algorithm,
AsymmetricCipherKeyPairGenerator generator,
SecureRandom random) {
if (algorithm.equals("RSA")) {
RSAKeyGenerationParameters params =
new RSAKeyGenerationParameters(new BigInteger("10001", 16), random, keySize, 80);
generator.init(params);
}
}