<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %replace(%msg){'f k="pin">(.*?)</f','f k="pin">**********</f'}%n</pattern>

<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %replace(%msg){'pin=(.*?),','pin=**********,'}%n</pattern>

@Component("maskingPatternLayout")
public class MaskingPatternLayout extends PatternLayout {

    @Autowired
    private Environment env;

    @Override
    public String doLayout(ILoggingEvent event) {
        String message=super.doLayout(event);

        String patternsProperty = env.getProperty("bowdleriser.patterns");

        if( patternsProperty != null ) {
            String[] patterns = patternsProperty.split("|");
            for (int i = 0; i < patterns.length; i++ ) {
                Pattern pattern = Pattern.compile(patterns[i]);
                Matcher matcher = pattern.matcher(event.getMessage());
                matcher.replaceAll("*");
            }
        } else {
            System.out.println("Bowdleriser not cleaning! Naughty strings are getting through!");
        }

        return message;
    }
}

<configuration>
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
        <layout class="com.touchcorp.touchpoint.utils.MaskingPatternLayout">
      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </layout>
    </encoder>
  </appender>

    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
      <file>logs/touchpoint.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
            <fileNamePattern>logs/touchpoint.%i.log.zip</fileNamePattern>
            <minIndex>1</minIndex>
            <maxIndex>3</maxIndex>
        </rollingPolicy>

        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <maxFileSize>10MB</maxFileSize>
        </triggeringPolicy>
      <encoder>
          <layout class="com.touchcorp.touchpoint.utils.MaskingPatternLayout">
            <pattern>%date{YYYY-MM-dd HH:mm:ss} %level [%thread] %logger{10} [%file:%line] %msg%n</pattern>
          </layout>
      </encoder>
    </appender>


  <logger name="com.touchcorp.touchpoint" level="DEBUG" />
  <logger name="org.springframework.web.servlet.mvc" level="TRACE" />

  <root level="INFO">
    <appender-ref ref="FILE" />
    <appender-ref ref="STDOUT" />
  </root>
</configuration>

public class MaskingPatternLayout extends PatternLayout {

    private String patternsProperty;

    public String getPatternsProperty() {
        return patternsProperty;
    }

    public void setPatternsProperty(String patternsProperty) {
        this.patternsProperty = patternsProperty;
    }

    @Override
    public String doLayout(ILoggingEvent event) {
        String message = super.doLayout(event);

        if (patternsProperty != null) {
            String[] patterns = patternsProperty.split("\|");
            for (int i = 0; i < patterns.length; i++) {
                Pattern pattern = Pattern.compile(patterns[i]);

                Matcher matcher = pattern.matcher(event.getMessage());
                if (matcher.find()) {
                    message = matcher.replaceAll("*");
                }
            }
        } else {

        }

        return message;
    }

}

<appender name="fileAppender1" class="ch.qos.logback.core.FileAppender">
    <file>c:/logs/kp-ws.log</file>
    <append>true</append>
    <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
        <layout class="com.kp.MaskingPatternLayout">
            <patternsProperty>.*password.*|.*karthik.*</patternsProperty>
            <pattern>%d [%thread] %-5level %logger{35} - %msg%n</pattern>
        </layout>
    </encoder>
</appender>
<root level="DEBUG">
    <appender-ref ref="fileAppender1" />
</root>

private String patternsProperty;
private Optional<Pattern> pattern;

public String getPatternsProperty() {
    return patternsProperty;
}

public void setPatternsProperty(String patternsProperty) {
    this.patternsProperty = patternsProperty;
    if (this.patternsProperty != null) {
        this.pattern = Optional.of(Pattern.compile(patternsProperty, Pattern.MULTILINE));
    } else {
        this.pattern = Optional.empty();
    }
}

    @Override
    public String doLayout(ILoggingEvent event) {
        final StringBuilder message = new StringBuilder(super.doLayout(event));

        if (pattern.isPresent()) {
            Matcher matcher = pattern.get().matcher(message);
            while (matcher.find()) {

                int group = 1;
                while (group <= matcher.groupCount()) {
                    if (matcher.group(group) != null) {
                        for (int i = matcher.start(group); i < matcher.end(group); i++) {
                            message.setCharAt(i, '*');
                        }
                    }
                    group++;
                }
            }
        }
        return message.toString();
    }

}

<appender name="fileAppender1" class="ch.qos.logback.core.FileAppender">
    <file>c:/logs/kp-ws.log</file>
    <append>true</append>
    <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
        <layout class="com.kp.MaskingPatternLayout">
            <patternsProperty>(password)|(karthik)</patternsProperty>
            <pattern>%d [%thread] %-5level %logger{35} - %msg%n</pattern>
        </layout>
    </encoder>
</appender>
<root level="DEBUG">
    <appender-ref ref="fileAppender1" />
</root>

My username=test and password=*******

replace(p){r, t}

%replace(  %replace(%msg){'regex1', 'replacement1'}  ){'regex2', 'replacement2'}