139 lines
3.5 KiB
Java
139 lines
3.5 KiB
Java
/*
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* Copyright 2018 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.pgpainless.algorithm;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import org.bouncycastle.bcpg.SymmetricKeyAlgorithmTags;
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/**
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* Enumeration of possible symmetric encryption algorithms.
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*
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* @see <a href="https://tools.ietf.org/html/rfc4880#section-9.2">RFC4880: Symmetric-Key Algorithms</a>
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*/
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public enum SymmetricKeyAlgorithm {
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/**
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* Plaintext or unencrypted data.
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*/
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NULL (SymmetricKeyAlgorithmTags.NULL),
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/**
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* IDEA is deprecated.
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* @deprecated use a different algorithm.
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*/
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@Deprecated
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IDEA (SymmetricKeyAlgorithmTags.IDEA),
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/**
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* TripleDES (DES-EDE - 168 bit key derived from 192).
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*/
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TRIPLE_DES (SymmetricKeyAlgorithmTags.TRIPLE_DES),
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/**
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* CAST5 (128 bit key, as per RFC2144).
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*/
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CAST5 (SymmetricKeyAlgorithmTags.CAST5),
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/**
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* Blowfish (128 bit key, 16 rounds).
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*/
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BLOWFISH (SymmetricKeyAlgorithmTags.BLOWFISH),
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/**
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* Reserved in RFC4880.
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* SAFER-SK128 (13 rounds)
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*/
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SAFER (SymmetricKeyAlgorithmTags.SAFER),
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/**
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* Reserved in RFC4880.
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* Reserved for DES/SK
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*/
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DES (SymmetricKeyAlgorithmTags.DES),
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/**
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* AES with 128-bit key.
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*/
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AES_128 (SymmetricKeyAlgorithmTags.AES_128),
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/**
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* AES with 192-bit key.
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*/
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AES_192 (SymmetricKeyAlgorithmTags.AES_192),
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/**
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* AES with 256-bit key.
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*/
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AES_256 (SymmetricKeyAlgorithmTags.AES_256),
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/**
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* Twofish with 256-bit key.
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*/
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TWOFISH (SymmetricKeyAlgorithmTags.TWOFISH),
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/**
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* Reserved for Camellia with 128-bit key.
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*/
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CAMELLIA_128 (SymmetricKeyAlgorithmTags.CAMELLIA_128),
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/**
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* Reserved for Camellia with 192-bit key.
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*/
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CAMELLIA_192 (SymmetricKeyAlgorithmTags.CAMELLIA_192),
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/**
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* Reserved for Camellia with 256-bit key.
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*/
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CAMELLIA_256 (SymmetricKeyAlgorithmTags.CAMELLIA_256),
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;
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private static final Map<Integer, SymmetricKeyAlgorithm> MAP = new ConcurrentHashMap<>();
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static {
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for (SymmetricKeyAlgorithm s : SymmetricKeyAlgorithm.values()) {
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MAP.put(s.algorithmId, s);
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}
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}
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/**
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* Return the {@link SymmetricKeyAlgorithm} enum that corresponds to the provided numeric id.
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* If an invalid id is provided, null is returned.
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*
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* @param id numeric algorithm id
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* @return symmetric key algorithm enum
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*/
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public static SymmetricKeyAlgorithm fromId(int id) {
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return MAP.get(id);
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}
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private final int algorithmId;
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SymmetricKeyAlgorithm(int algorithmId) {
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this.algorithmId = algorithmId;
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}
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/**
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* Return the numeric algorithm id of the enum.
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*
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* @return numeric id
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*/
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public int getAlgorithmId() {
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return algorithmId;
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}
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}
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