io.gravitee.am.gateway.handler.common.utils.HashUtil Maven / Gradle / Ivy

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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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
 *
 *         http://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 io.gravitee.am.gateway.handler.common.utils;

import lombok.extern.slf4j.Slf4j;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.HexFormat;

@Slf4j
public class HashUtil {
    public static String generateSHA256(String input) {
        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-256");
            byte[] encodedHash = digest.digest(input.getBytes(StandardCharsets.UTF_8));
            return HexFormat.of().formatHex(encodedHash);
        } catch (NoSuchAlgorithmException e) {
            log.debug("Cannot generate hash", e);
            throw new RuntimeException(e);
        }
    }

    public static boolean compare(String hash, String rawString) {
        String toCompare = generateSHA256(rawString);
        return hash.equals(toCompare);
    }
}