字符串 签名认证

DZMD5.java

package systems.baseutil.tool;

import java.io.UnsupportedEncodingException;
import java.security.SignatureException;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.StringUtils;

/**
* 功能：支付宝MD5签名处理核心文件，不需要修改
* 版本：3.3
* 修改日期：2012-08-17
* 说明：
* 以下代码只是为了方便商户测试而提供的样例代码，商户可以根据自己网站的需要，按照技术文档编写,并非一定要使用该代码。
* 该代码仅供学习和研究支付宝接口使用，只是提供一个
* */

public class DZMD5 {

/**
* 签名字符串
* @param text 需要签名的字符串
* @param key 密钥
* @param input_charset 编码格式
* @return 签名结果
*/
public static String sign(String text, String key, String input_charset) {
text = StringUtils.isBlank(text)?("key=" + key):(text + "&key=" + key);
return DigestUtils.md5Hex(getContentBytes(text, input_charset));
}

/**
* 签名字符串
* @param text 需要签名的字符串
* @param sign 签名结果
* @param key 密钥
* @param input_charset 编码格式
* @return 签名结果
*/
public static boolean verify(String text, String sign, String key, String input_charset) {
String mysign = sign(text, key, input_charset);
if(mysign.equals(sign)) {
return true;
}
else {
return false;
}
}

/**
* @param content
* @param charset
* @return
* @throws SignatureException
* @throws UnsupportedEncodingException
*/
private static byte[] getContentBytes(String content, String charset) {
if (charset == null || "".equals(charset)) {
return content.getBytes();
}
try {
return content.getBytes(charset);
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("MD5签名过程中出现错误,指定的编码集不对,您目前指定的编码集是:" + charset);
}
}

}
DZSignUtils.java

package systems.baseutil.tool;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class DZSignUtils {

private static final String KEY = "2b3befd6c0be6d15eef53fe3c25df0fb";

public static String sign(Map<String, String> parameterMap) {
if(parameterMap == null){
return null;
}
Map<String, String> filterParameterMap = filterParameter(parameterMap);
String linkParameterStr = linkFileName(filterParameterMap);
return DZMD5.sign(linkParameterStr, KEY, "UTF-8");
}

/**去除key=sign 的键值对
* @param parameterMap
*/
public static Map<String, String> filterParameter(Map<String, String> parameterMap) {
Map<String, String> resultMap = new HashMap<String, String>();
if(parameterMap != null){
for (String key : parameterMap.keySet()) {
if("sign".equals(key)){
continue;
}
resultMap.put(key, parameterMap.get(key));
}
}
return resultMap;
}

/**
* 将map的key与value排序用&拼接成字符串
* @param parameterMap
* @return key1=value1&key2=value2&key3=value3.....
*/
public static String linkFileName(Map<String, String> parameterMap) {
if (parameterMap == null || parameterMap.size() < 1) {
return null;
}

List<String> keyList = new ArrayList<String>(parameterMap.keySet());
Collections.sort(keyList);

StringBuffer sb = new StringBuffer();
for (int i = 0; i < keyList.size(); i++) {
String key = keyList.get(i);
String keyValue = parameterMap.get(key);
sb.append(key).append("=").append(keyValue);
if (i < keyList.size() - 1) {
sb.append("&");
}
}
return sb.toString();
}

public static boolean verify(Map<String, String> parameterMap, String sign) {
String localSign = sign(parameterMap);
if (localSign != null) {
return localSign.equals(sign);
}
return false;
}

public static void main(String[] args) throws UnsupportedEncodingException {
String sign = "f527b7db45af077b88d45e0fe7318c64";

Map<String, String> parameterMap = new HashMap<String, String>();
parameterMap.put("limit", "10");
parameterMap.put("hostName", "dz6225");
parameterMap.put("sign", sign);

// System.out.println(linkFileName(parameterMap));
// System.out.println(filterParameter(parameterMap));
System.out.println(sign(parameterMap));
System.out.println(verify(parameterMap, sign));

// System.out.println(DigestUtils.md5Hex("userId=287310&verifyCodeInfo={\"answerList\":[{\"submitUrl1\":\"\\/r\\/u\\/purchase.jsp?ln=4870_234043__0_&t1=16664&verifyCode=1&pftype=ChapterFee&t=qc6lm6gK%2BuKJ1Z2f5B5uHA%3D%3D&cm=M3020050&purl=%2Fr%2Fl%2Fr.jsp%3Faaa_flag%3D1%26cm%3DM3020050%26bid%3D353148106%26cid%3D353148146&cid=353148146&bid=353148106&h=1&layout=9\",\"PicUrl1\":\"\\/r\\/images\\/verification\\/1.png?ln=4870_234043__0_&t1=16664&cm=M3020050\"},{\"submitUrl2\":\"\\/r\\/u\\/purchase.jsp?ln=4870_234043__0_&t1=16664&verifyCode=3&pftype=ChapterFee&t=qc6lm6gK%2BuKJ1Z2f5B5uHA%3D%3D&cm=M3020050&purl=%2Fr%2Fl%2Fr.jsp%3Faaa_flag%3D1%26cm%3DM3020050%26bid%3D353148106%26cid%3D353148146&cid=353148146&bid=353148106&h=1&layout=9\",\"PicUrl2\":\"\\/r\\/images\\/verification\\/3.png?ln=4870_234043__0_&t1=16664&cm=M3020050\"},{\"PicUrl3\":\"\\/r\\/images\\/verification\\/9.png?ln=4870_234043__0_&t1=16664&cm=M3020050\",\"submitUrl3\":\"\\/r\\/u\\/purchase.jsp?ln=4870_234043__0_&t1=16664&verifyCode=9&pftype=ChapterFee&t=qc6lm6gK%2BuKJ1Z2f5B5uHA%3D%3D&cm=M3020050&purl=%2Fr%2Fl%2Fr.jsp%3Faaa_flag%3D1%26cm%3DM3020050%26bid%3D353148106%26cid%3D353148146&cid=353148146&bid=353148106&h=1&layout=9\"},{\"PicUrl4\":\"\\/r\\/images\\/verification\\/5.png?ln=4870_234043__0_&t1=16664&cm=M3020050\",\"submitUrl4\":\"\\/r\\/u\\/purchase.jsp?ln=4870_234043__0_&t1=16664&verifyCode=5&pftype=ChapterFee&t=qc6lm6gK%2BuKJ1Z2f5B5uHA%3D%3D&cm=M3020050&purl=%2Fr%2Fl%2Fr.jsp%3Faaa_flag%3D1%26cm%3DM3020050%26bid%3D353148106%26cid%3D353148146&cid=353148146&bid=353148106&h=1&layout=9\"}],\"verifyCodePicUrl\":\"\\/r\\/vs\\/avi?ln=4870_234043__0_&t1=16664&pftype=ChapterFee&cm=M3020050&picw=120&pich=32&picfs=16&pictd=1439794609599&layout=9\"}}&key=ddbc9169242b479da867eb24efb735d1".getBytes("utf-8")));
}
}