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Kotlin conversion: AEADAlgorithm

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This commit is contained in:
Paul Schaub 2023-08-04 17:01:54 +02:00
parent 794da41e27
commit 659d2c49bd
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
2 changed files with 30 additions and 100 deletions
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100
pgpainless-core/src/main/java/org/pgpainless/algorithm/AEADAlgorithm.java
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// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.algorithm;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
/**
* List of AEAD algorithms defined in crypto-refresh-06.
*
* @see <a href="https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-06.html#name-aead-algorithms">
* Crypto-Refresh-06 §9.6 - AEAD Algorithms</a>
*/
public enum AEADAlgorithm {
EAX(1, 16, 16),
OCB(2, 15, 16),
GCM(3, 12, 16),
;
private final int algorithmId;
private final int ivLength;
private final int tagLength;
private static final Map<Integer, AEADAlgorithm> MAP = new HashMap<>();
static {
for (AEADAlgorithm h : AEADAlgorithm.values()) {
MAP.put(h.algorithmId, h);
}
}
AEADAlgorithm(int id, int ivLength, int tagLength) {
this.algorithmId = id;
this.ivLength = ivLength;
this.tagLength = tagLength;
}
/**
* Return the ID of the AEAD algorithm.
*
* @return algorithm ID
*/
public int getAlgorithmId() {
return algorithmId;
}
/**
* Return the length (in octets) of the IV.
*
* @return iv length
*/
public int getIvLength() {
return ivLength;
}
/**
* Return the length (in octets) of the authentication tag.
*
* @return tag length
*/
public int getTagLength() {
return tagLength;
}
/**
* Return the {@link AEADAlgorithm} value that corresponds to the provided algorithm id.
* If an invalid algorithm id was provided, null is returned.
*
* @param id numeric id
* @return enum value
*/
@Nullable
public static AEADAlgorithm fromId(int id) {
return MAP.get(id);
}
/**
* Return the {@link AEADAlgorithm} value that corresponds to the provided algorithm id.
* If an invalid algorithm id was provided, throw a {@link NoSuchElementException}.
*
* @param id algorithm id
* @return enum value
* @throws NoSuchElementException in case of an unknown algorithm id
*/
@Nonnull
public static AEADAlgorithm requireFromId(int id) {
AEADAlgorithm algorithm = fromId(id);
if (algorithm == null) {
throw new NoSuchElementException("No AEADAlgorithm found for id " + id);
}
return algorithm;
}
}

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pgpainless-core/src/main/java/org/pgpainless/algorithm/AEADAlgorithm.kt Normal file
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// SPDX-FileCopyrightText: 2023 Paul Schaub <info@pgpainless.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.algorithm
enum class AEADAlgorithm(
val algorithmId: Int,
val ivLength: Int,
val tagLength: Int) {
EAX(1, 16, 16),
OCB(2, 15, 16),
GCM(3, 12, 16),
;
companion object {
@JvmStatic
fun fromId(id: Int): AEADAlgorithm? {
return values().firstOrNull {
algorithm -> algorithm.algorithmId == id
}
}
@JvmStatic
fun requireFromId(id: Int): AEADAlgorithm {
return fromId(id) ?:
throw NoSuchElementException("No AEADAlgorithm found for id $id")
}
}
}