许多系统为了安全需要对敏感信息(如手机号、邮箱、姓名、身份证号、密码、卡号、住址等)的日志打印要求脱敏后才能输出,本文将结合个人经历及总结分享一种log4j日志脱敏方式。
自定义Layout
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.Node;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginElement;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
import org.apache.logging.log4j.core.layout.AbstractStringLayout;
import org.apache.logging.log4j.core.layout.PatternLayout;
import org.apache.logging.log4j.core.pattern.RegexReplacement;
import java.nio.charset.Charset;
@Plugin(name = "MyPatternLayout", category = Node.CATEGORY, elementType = Layout.ELEMENT_TYPE, printObject = true)
public class MyPatternLayout extends AbstractStringLayout {
private PatternLayout patternLayout;
private Boolean sensitive;
private RegexReplacement[] replaces;
protected MyPatternLayout(Charset charset, String pattern, Boolean sensitive, RegexReplacement[] replaces) {
super(charset);
patternLayout = PatternLayout.newBuilder().withPattern(pattern).build();
this.sensitive = sensitive;
this.replaces = replaces;
}
/**
* 插件构造工厂方法
*
* @param pattern 输出pattern
* @param charset 字符集
* @param sensitive 是否开启脱敏
* @param replaces 脱敏规则
* @return Layout<String>
*/
@PluginFactory
public static Layout<String> createLayout(@PluginAttribute(value = "pattern") final String pattern,
@PluginAttribute(value = "charset", defaultString = "UTF-8") final Charset charset,
@PluginAttribute(value = "sensitive") final Boolean sensitive,
@PluginElement("replace") final RegexReplacement[] replaces) {
return new MyPatternLayout(charset, pattern, sensitive, replaces);
}
@Override
public String toSerializable(LogEvent event) {
// 原日志信息
String msg = this.patternLayout.toSerializable(event);
if (Boolean.FALSE.equals(this.sensitive)) {
// 不脱敏,直接返回
return msg;
}
if (this.replaces == null || this.replaces.length == 0) {
throw new RuntimeException("未配置脱敏规则,请检查配置重试");
}
for (RegexReplacement replace : this.replaces) {
// 遍历脱敏正则 & 替换敏感数据
msg = replace.format(msg);
}
// 脱敏后的日志
return msg;
}
}
编写log4j配置
以下预设了8中常见规则,请自行根据实际情况修改
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<properties>
<!-- 文件输出格式 -->
<property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} %5level --- [%t] %c : %msg%n</property>
</properties>
<appenders>
<!-- 日志打印到控制台Appender -->
<Console name="CONSOLE" target="system_out">
<MyPatternLayout pattern="${PATTERN}" sensitive="true">
<replace>
<!-- 11位的手机号:保留前3后4 -->
<regex>
<![CDATA[
(mobile|手机号)(=|=\[|\":\"|:|:|=')(1)([3-9]{2})(\d{4})(\d{4})(\]|\"|'|)
]]>
</regex>
<replacement>$1$2$3$4****$6$7</replacement>
</replace>
<replace>
<!-- 固定电话:XXXX-XXXXXXXX或XXX-XXXXXXXX,保留区号+前2后2 -->
<regex>
<![CDATA[
(tel|座机)(=|=\[|\":\"|:|:|=')([\d]{3,4}-)(\d{2})(\d{4})(\d{2})(\]|\"|'|)
]]>
</regex>
<replacement>$1$2$3$4****$6$7</replacement>
</replace>
<replace>
<!-- 地址:汉字+字母+数字+下划线+中划线,留前3个汉字 -->
<regex>
<![CDATA[
(地址|住址|address)(=|=\[|\":\"|:|:|=')([\u4e00-\u9fa5]{3})(\w|[\u4e00-\u9fa5]|-)*(\]|\"|'|)
]]>
</regex>
<replacement>$1$2$3****$5</replacement>
</replace>
<replace>
<!-- 19位的卡号,保留后4 -->
<regex>
<![CDATA[
(cardNo|卡号)(=|=\[|\":\"|:|:|=')(\d{15})(\d{4})(\]|\"|'|)
]]>
</regex>
<replacement>$1$2***************$4$5</replacement>
</replace>
<replace>
<!-- 姓名,2-4汉字,留前1-->
<regex>
<![CDATA[
(name|姓名)(=|=\[|\":\"|:|:|=')([\u4e00-\u9fa5]{1})([\u4e00-\u9fa5]{1,3})(\]|\"|'|)
]]>
</regex>
<replacement>$1$2$3**$5</replacement>
</replace>
<replace>
<!-- 密码 6位数字,全* -->
<regex>
<![CDATA[
(password|密码|验证码)(=|=\[|\":\"|:|:|=')(\d{6})(\]|\"|'|)
]]>
</regex>
<replacement>$1$2******$4</replacement>
</replace>
<replace>
<!-- 身份证,18位(结尾为数字或X、x),保留前1后1 -->
<regex>
<![CDATA[
(身份证号|idCard)(=|=\[|\":\"|:|:|=')(\d{1})(\d{16})([\d|X|x]{1})(\]|\"|)
]]>
</regex>
<replacement>$1$2$3****************$5$6</replacement>
</replace>
<replace>
<!-- 邮箱,保留@前的前1后1 -->
<regex>
<![CDATA[
(\w{1})(\w*)(\w{1})@(\w+).com
]]>
</regex>
<replacement>$1****$3@$4.com</replacement>
</replace>
</MyPatternLayout>
</Console>
</appenders>
<loggers>
<!-- 控制台输出 -->
<root level="info">
<AppenderRef ref="CONSOLE"/>
</root>
</loggers>
</configuration>
注意:
- Console使用了上一节中我们自己写的的MyPatternLayout,MyPatternLayout的两个属性pattern和sensitive,对应类MyPatternLayout的插件工厂方法的入参
- MyPatternLayout节点的子节点replace(可多个)是我们配置的脱敏正则表达式
正则匹配说明
<replace>
<!-- 11位的手机号:保留前3后4 -->
<regex>
<![CDATA[
(mobile|手机号|phoneNo)(=|=\[|\":\"|:|:|=')(1)([3-9]{2})(\d{4})(\d{4})(\]|\"|'|)
]]>
</regex>
<replacement>$1$2$3$4****$6$7</replacement>
</replace>
regex说明
- (mobile|手机号|phoneNo):脱敏关键字,多个之间以英文|分隔
- (=|=[|\":\"|:|:|='):关键字后的符号,多个之间以英文|分隔,详见下文匹配说明
- (1):匹配数字1
- ([3-9]{2}):匹配2位数字,取值为3-9间的数字
- (\d{4}):匹配4位数字
- (\d{4}):匹配4位数字
(]|\"|'|):匹配值后的其他字符
// 代码 logger.infoMessage("mobile={}", "13511114444"); # 脱敏后 2021-11-16 11:02:08.767 INFO --- [main] log.test.LogTest : mobile=135****4444
分组匹配示意图(同颜色为对应关系)
replacement中的$n即对应第n对括号(从1开始),上图中共有7对括号,$1$2$3$4**** $6$7则表示,仅有第5组内容被** 替代,其他内容按原内容显示
注意事项
- 根据情况自行调整replace节点
- 含脱敏关键字的正则,尽量列举全面
- 值匹配正则(如上文的手机号的第3分组到倒数第2分组):需要根据实际情况调整,特别是卡号、账号的规则,各家银行或有不同
- 修改完配置后,务必进行测试,正则解析出错只有运行时可发现
日志打印规范,根据第2分组(=|=[|\":\"|:|:|=')可知,可匹配如下情况
@Test public void test0() { // 等号 logger.infoMessage("mobile={}", "13511114444"); // 等号+[ logger.infoMessage("mobile=[{}]", "13511114444"); // 英文单引号+等号 logger.infoMessage("mobile'='{}'", "13511114444"); // 中文冒号 logger.infoMessage("mobile:{}", "13511114444"); // 英文冒号 logger.infoMessage("mobile:{}", "13511114444"); // 英文双引号+英文冒号 logger.infoMessage("\"mobile\":\"{}\"", "13511114444"); } # 脱敏后 log.test.LogTest : mobile=135****4444 log.test.LogTest : mobile=[135****4444] log.test.LogTest : mobile:135****4444 log.test.LogTest : mobile:135****4444 log.test.LogTest : 'mobile'='13511114444' log.test.LogTest : "mobile":"135****4444"
对于不符合如上的情况,请调整代码或修改匹配正则
脱敏测试
普通字符串值直接输出
@Test
public void test1() {
//11位手机号
logger.infoMessage("mobile={}", "13511114444");
logger.infoMessage("mobile={},手机号:{}", "13511112222", "13511113333");
logger.infoMessage("手机号:{}", "13511115555");
//固定电话(带区号-)
logger.infoMessage("tel:{},座机={}", "0791-83376222", "021-88331234");
logger.infoMessage("tel:{}", "0791-83376222");
logger.infoMessage("座机={}", "021-88331234");
//地址
logger.infoMessage("address:{}", "浙江省杭州市西湖区北京西路100号");
logger.infoMessage("地址:{}", "上海市浦东区北京东路1-10号");
//19位卡号
logger.infoMessage("cardNo:{}", "6227002020000101222");
//姓名
logger.infoMessage("name={}, 姓名=[{}],name={},姓名:{}", "张三", "上官婉儿", "李云龙", "楚云飞");
//密码
logger.infoMessage("password:{},密码={}", "123456", "456789");
logger.infoMessage("password:{}", "123456");
logger.infoMessage("密码={}", "123456");
//身份证号码
logger.infoMessage("idCard:{},身份证号={}", "360123202111111122", "360123202111111122");
logger.infoMessage("身份证号={}", "360123202111111122");
//邮箱
logger.infoMessage("邮箱:{}", "wxyz123@qq.com");
logger.infoMessage("email={}", "wxyz123@qq.com");
}
# 结果
log.test.LogTest : mobile=135****4444
log.test.LogTest : mobile=135****2222,手机号:135****3333
log.test.LogTest : 手机号:135****5555
log.test.LogTest : tel:0791-83****22,座机=021-88****34
log.test.LogTest : tel:0791-83****22
log.test.LogTest : 座机=021-88****34
log.test.LogTest : address:浙江省****
log.test.LogTest : 地址:上海市****
log.test.LogTest : cardNo:***************1222
log.test.LogTest : name=张**, 姓名=[上**],name=李**,姓名:楚**
log.test.LogTest : password:******,密码=******
log.test.LogTest : password:******
log.test.LogTest : 密码=******
log.test.LogTest : idCard:3****************2,身份证号=3****************2
log.test.LogTest : 身份证号=3****************2
log.test.LogTest : 邮箱:w****3@qq.com
log.test.LogTest : email=w****3@qq.com
json和toString的脱敏输出
@Test
public void test2() {
User user = new User();
user.setCardNo("6227002020000101222");
user.setTel("0571-28821111");
user.setAddress("浙江省西湖区西湖路288号钱江乐园2-101室");
user.setEmail("zhangs12345@qq.com");
user.setPassword("123456");
user.setMobile("15911116789");
user.setName("张三");
user.setIdCard("360123202111111122");
Job job = new Job();
job.setAddress("浙江省西湖区西湖路288号钱江乐园2-101室");
job.setTel("0571-12345678");
job.setJobName("操作员");
job.setSalary(2000);
job.setCompany("股份有限公司");
job.setPosition(Arrays.asList("需求", "开发", "测试", "上线"));
user.setJob(job);
//toString
logger.infoMessage("用户信息:{}", user);
//json
logger.infoMessage("用户信息:{}", JSONUtil.toJsonStr(user));
}
log.test.LogTest : 用户信息:User{name='张**', idCard='3****************2', cardNo='***************1222', mobile='159****6789', tel='0571-28****11', password='******', email='z****5@qq.com', address='浙江省****', job=Job{jobName='操作员', salary=2000, company='股份有限公司', address='浙江省****', tel='0571-12****78', position=[需求, 开发, 测试, 上线]}}
log.test.LogTest : 用户信息:{"password":"******","address":"浙江省****","idCard":"3****************2","name":"张**","mobile":"159****6789","tel":"0571-28****11","job":{"jobName":"操作员","address":"浙江省****","company":"股份有限公司","tel":"0571-12****78","position":["需求","开发","测试","上线"],"salary":2000},"cardNo":"***************1222","email":"z****5@qq.com"}
在线正则测试:https://c.runoob.com/front-en...
参考链接
来源:blog.csdn.net/blue_driver/article/details/122025368
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