com.riversoft.weixin.common.decrypt.SHA1 Maven / Gradle / Ivy
/**
* 对公众平台发送给公众账号的消息加解密示例代码.
*
* @copyright Copyright (c) 1998-2014 Tencent Inc.
*/
// ------------------------------------------------------------------------
package com.riversoft.weixin.common.decrypt;
import java.security.MessageDigest;
import java.util.Arrays;
/**
* SHA1 class
*
* 计算公众平台的消息签名接口.
*/
public class SHA1 {
/**
* 用SHA1算法生成安全签名
*
* @param array 字符串
* @return 安全签名
* @throws AesException
*/
public static String getSHA1(String... array) throws AesException {
StringBuffer sb = new StringBuffer();
// 字符串排序
Arrays.sort(array);
for(String item: array) {
sb.append(item);
}
return getSHA1(sb.toString());
}
public static String getSHA1(String string) throws AesException {
// SHA1签名生成
try {
MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(string.getBytes());
byte[] digest = md.digest();
StringBuffer hexstr = new StringBuffer();
String shaHex = "";
for (int i = 0; i < digest.length; i++) {
shaHex = Integer.toHexString(digest[i] & 0xFF);
if (shaHex.length() < 2) {
hexstr.append(0);
}
hexstr.append(shaHex);
}
return hexstr.toString();
} catch (Exception e) {
throw new AesException(AesException.ComputeSignatureError);
}
}
}