spring security Sha512DigestUtils 源码
spring security Sha512DigestUtils 代码
文件路径：/core/src/main/java/org/springframework/security/core/token/Sha512DigestUtils.java
/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.security.core.token;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import org.springframework.security.crypto.codec.Hex;
/**
* Provides SHA512 digest methods.
*
* <p>
* Based on Commons Codec, which does not presently provide SHA512 support.
* </p>
*
* @author Ben Alex
* @since 2.0.1
*
*/
public abstract class Sha512DigestUtils {
/**
* Returns an SHA digest.
* @return An SHA digest instance.
* @throws RuntimeException when a {@link java.security.NoSuchAlgorithmException} is
* caught.
*/
private static MessageDigest getSha512Digest() {
try {
return MessageDigest.getInstance("SHA-512");
}
catch (NoSuchAlgorithmException ex) {
throw new RuntimeException(ex.getMessage());
}
}
/**
* Calculates the SHA digest and returns the value as a <code>byte[]</code>.
* @param data Data to digest
* @return SHA digest
*/
public static byte[] sha(byte[] data) {
return getSha512Digest().digest(data);
}
/**
* Calculates the SHA digest and returns the value as a <code>byte[]</code>.
* @param data Data to digest
* @return SHA digest
*/
public static byte[] sha(String data) {
return sha(data.getBytes());
}
/**
* Calculates the SHA digest and returns the value as a hex string.
* @param data Data to digest
* @return SHA digest as a hex string
*/
public static String shaHex(byte[] data) {
return new String(Hex.encode(sha(data)));
}
/**
* Calculates the SHA digest and returns the value as a hex string.
* @param data Data to digest
* @return SHA digest as a hex string
*/
public static String shaHex(String data) {
return new String(Hex.encode(sha(data)));
}
}
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