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Kotlin conversion: HashAlgorithm

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This commit is contained in:
Paul Schaub 2023-08-04 17:03:59 +02:00
parent 98e9c0934d
commit 2c38490742
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
2 changed files with 76 additions and 118 deletions
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118
pgpainless-core/src/main/java/org/pgpainless/algorithm/HashAlgorithm.java
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// SPDX-FileCopyrightText: 2018 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.algorithm;
import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
import org.bouncycastle.bcpg.HashAlgorithmTags;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
/**
* An enumeration of different hashing algorithms.
*
* @see <a href="https://tools.ietf.org/html/rfc4880#section-9.4">RFC4880: Hash Algorithms</a>
*/
public enum HashAlgorithm {
@Deprecated
MD5 (HashAlgorithmTags.MD5, "MD5"),
SHA1 (HashAlgorithmTags.SHA1, "SHA1"),
RIPEMD160 (HashAlgorithmTags.RIPEMD160, "RIPEMD160"),
SHA256 (HashAlgorithmTags.SHA256, "SHA256"),
SHA384 (HashAlgorithmTags.SHA384, "SHA384"),
SHA512 (HashAlgorithmTags.SHA512, "SHA512"),
SHA224 (HashAlgorithmTags.SHA224, "SHA224"),
SHA3_256 (12, "SHA3-256"),
SHA3_512 (14, "SHA3-512"),
;
private static final Map<Integer, HashAlgorithm> ID_MAP = new HashMap<>();
private static final Map<String, HashAlgorithm> NAME_MAP = new HashMap<>();
static {
for (HashAlgorithm h : HashAlgorithm.values()) {
ID_MAP.put(h.algorithmId, h);
NAME_MAP.put(h.name, h);
}
}
/**
* Return the {@link HashAlgorithm} 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 HashAlgorithm fromId(int id) {
return ID_MAP.get(id);
}
/**
* Return the {@link HashAlgorithm} 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 HashAlgorithm requireFromId(int id) {
HashAlgorithm algorithm = fromId(id);
if (algorithm == null) {
throw new NoSuchElementException("No HashAlgorithm found for id " + id);
}
return algorithm;
}
/**
* Return the {@link HashAlgorithm} value that corresponds to the provided name.
* If an invalid algorithm name was provided, null is returned.
*
* @see <a href="https://datatracker.ietf.org/doc/html/rfc4880#section-9.4">RFC4880: §9.4 Hash Algorithms</a>
* for a list of algorithms and names.
*
* @param name text name
* @return enum value
*/
@Nullable
public static HashAlgorithm fromName(String name) {
String algorithmName = name.toUpperCase();
HashAlgorithm algorithm = NAME_MAP.get(algorithmName);
if (algorithm == null) {
algorithm = NAME_MAP.get(algorithmName.replace("-", ""));
}
return algorithm;
}
private final int algorithmId;
private final String name;
HashAlgorithm(int id, String name) {
this.algorithmId = id;
this.name = name;
}
/**
* Return the numeric algorithm id of the hash algorithm.
*
* @return numeric id
*/
public int getAlgorithmId() {
return algorithmId;
}
/**
* Return the text name of the hash algorithm.
*
* @return text name
*/
public String getAlgorithmName() {
return name;
}
}

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pgpainless-core/src/main/java/org/pgpainless/algorithm/HashAlgorithm.kt Normal file
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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.algorithm
/**
* An enumeration of different hashing algorithms.
*
* See [RFC4880: Hash Algorithms](https://tools.ietf.org/html/rfc4880#section-9.4)
*/
enum class HashAlgorithm(val algorithmId: Int, val algorithmName: String) {
@Deprecated("MD5 is deprecated")
MD5 (1, "MD5"),
SHA1 (2, "SHA1"),
RIPEMD160 (3, "RIPEMD160"),
SHA256 (8, "SHA256"),
SHA384 (9, "SHA384"),
SHA512 (10, "SHA512"),
SHA224 (11, "SHA224"),
SHA3_256 (12, "SHA3-256"),
SHA3_512 (14, "SHA3-512"),
;
companion object {
/**
* Return the [HashAlgorithm] 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
*/
@JvmStatic
fun fromId(id: Int): HashAlgorithm? {
return values().firstOrNull {
h -> h.algorithmId == id
}
}
/**
* Return the [HashAlgorithm] value that corresponds to the provided algorithm id.
* If an invalid algorithm id was provided, throw a [NoSuchElementException].
*
* @param id algorithm id
* @return enum value
* @throws NoSuchElementException in case of an unknown algorithm id
*/
@JvmStatic
fun requireFromId(id: Int): HashAlgorithm {
return fromId(id) ?:
throw NoSuchElementException("No HashAlgorithm found for id $id")
}
/**
* Return the [HashAlgorithm] value that corresponds to the provided name.
* If an invalid algorithm name was provided, null is returned.
*
* See [RFC4880: §9.4 Hash Algorithms](https://datatracker.ietf.org/doc/html/rfc4880#section-9.4)
* for a list of algorithms and names.
*
* @param name text name
* @return enum value
*/
@JvmStatic
fun fromName(name: String): HashAlgorithm? {
return name.uppercase().let { algoName ->
values().firstOrNull {
it.algorithmName == algoName
} ?: values().firstOrNull {
it.algorithmName == algoName.replace("-", "")
}
}
}
}
}