private static CipherParameters extractPBES2CipherParams(
char[] password, PBES2Parameters pbeParams) {
PBKDF2Params pbkdfParams =
PBKDF2Params.getInstance(pbeParams.getKeyDerivationFunc().getParameters());
int keySize = 192;
if (pbkdfParams.getKeyLength() != null) {
keySize = pbkdfParams.getKeyLength().intValue() * 8;
}
int iterationCount = pbkdfParams.getIterationCount().intValue();
byte[] salt = pbkdfParams.getSalt();
PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
generator.init(PBEParametersGenerator.PKCS5PasswordToBytes(password), salt, iterationCount);
return generator.generateDerivedParameters(keySize);
}
