/**
* Creates a new instance with the given parameters.
*
* @param alg Symmetric algorithm used for encryption/decryption.
* @param digest Key generation function digest.
* @param params Key generation function salt and iteration count.
*/
public PBES1EncryptionScheme(
final SymmetricAlgorithm alg, final DigestAlgorithm digest, final PBEParameter params) {
boolean valid = false;
for (PBES1Algorithm a : PBES1Algorithm.values()) {
if (a.getDigest().getAlgorithm().equals(digest.getAlgorithm())
&& a.getSpec().getName().equals(alg.getAlgorithm())
&& a.getSpec().getMode().equals(alg.getMode())
&& a.getSpec().getPadding().equals(alg.getPadding())) {
valid = true;
break;
}
}
if (!valid) {
throw new IllegalArgumentException("Invalid digest/cipher combination.");
}
setCipher(alg);
generator = new PBKDF1KeyGenerator(digest, params.getSalt(), params.getIterationCount());
}
/**
* Creates a new instance with the given parameters.
*
* @param alg Describes hash/algorithm pair suitable for PBES1 scheme.
* @param params Key generation function salt and iteration count.
*/
public PBES1EncryptionScheme(final PBES1Algorithm alg, final PBEParameter params) {
setCipher(SymmetricAlgorithm.newInstance(alg.getSpec()));
generator =
new PBKDF1KeyGenerator(alg.getDigest(), params.getSalt(), params.getIterationCount());
}