com.alibaba.nls.client.util.Signer Maven / Gradle / Ivy
/*
* Copyright 2015 Alibaba Group Holding Limited
*
* 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 com.alibaba.nls.client.util;
import java.io.UnsupportedEncodingException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.SimpleTimeZone;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
/**
* @author zhishen.ml
*/
public class Signer {
private static final String ALGORITHM_NAME = "HmacSHA1";
private static final String ENCODING = "UTF-8";
private static final String GMT="GMT";
public static String signString(String stringToSign, String accessKeySecret) {
try {
Mac mac = Mac.getInstance(ALGORITHM_NAME);
mac.init(new SecretKeySpec(
accessKeySecret.getBytes(ENCODING),
ALGORITHM_NAME
));
byte[] signData = mac.doFinal(stringToSign.getBytes(ENCODING));
String encodeToString = Base64Encoder.encode(signData);
return encodeToString.substring(0, (encodeToString + "\n").length() - 1);
} catch (NoSuchAlgorithmException e) {
throw new IllegalArgumentException(e.toString());
} catch (UnsupportedEncodingException e) {
throw new IllegalArgumentException(e.toString());
} catch (Exception e) {
throw new IllegalArgumentException(e.toString());
}
}
public static String toGMTString() {
return toGMTString(new Date());
}
private static String toGMTString(Date date) {
SimpleDateFormat df = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss z", Locale.UK);
df.setTimeZone(new SimpleTimeZone(0, GMT));
String text = df.format(date);
if (!text.endsWith(GMT)) {
// delete +00:00 from the end of string: Sun, 30 Sep 2018 08:42:06 GMT+00:00
text = text.substring(0, text.length() - 6);
}
return text;
}
}