Convert a SID to String with Java

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>SIDConvertToString</groupId>
  <artifactId>SIDConvertToString</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <dependencies>
  	<dependency>
	    <groupId>net.java.dev.jna</groupId>
	    <artifactId>jna</artifactId>
	    <version>4.1.0</version>
	</dependency>
	<dependency>
	    <groupId>net.java.dev.jna</groupId>
	    <artifactId>jna-platform</artifactId>
	    <version>4.1.0</version>
	</dependency>
  </dependencies>
</project>

SIDConverter.java

public class SIDConverter {
	
	public static String convertSidToStringSid(byte[] sid) {
	    int offset, size;
	 
	    // sid[0] is the Revision, we allow only version 1, because it's the
	    // only that exists right now.
	    if (sid[0] != 1)
	        throw new IllegalArgumentException("SID revision must be 1");
	 
	    StringBuilder stringSidBuilder = new StringBuilder("S-1-");
	 
	    // The next byte specifies the numbers of sub authorities (number of
	    // dashes minus two)
	    int subAuthorityCount = sid[1] & 0xFF;
	 
	    // IdentifierAuthority (6 bytes starting from the second) (big endian)
	    long identifierAuthority = 0;
	    offset = 2;
	    size = 6;
	    for (int i = 0; i < size; i++) {
	        identifierAuthority |= (long) (sid[offset + i] & 0xFF) << (8 * (size - 1 - i));
	        // The & 0xFF is necessary because byte is signed in Java
	    }
	    if (identifierAuthority < Math.pow(2, 32)) {
	        stringSidBuilder.append(Long.toString(identifierAuthority));
	    } else {
	        stringSidBuilder.append("0x").append(
	                Long.toHexString(identifierAuthority).toUpperCase());
	    }
	 
	    // Iterate all the SubAuthority (little-endian)
	    offset = 8;
	    size = 4; // 32-bits (4 bytes) for each SubAuthority
	    for (int i = 0; i < subAuthorityCount; i++, offset += size) {
	        long subAuthority = 0;
	        for (int j = 0; j < size; j++) {
	            subAuthority |= (long) (sid[offset + j] & 0xFF) << (8 * j);
	            // The & 0xFF is necessary because byte is signed in Java
	        }
	        stringSidBuilder.append("-").append(subAuthority);
	    }
	 
	    return stringSidBuilder.toString();
	}

}

TestSIDConverter.java

import static org.junit.Assert.*;

import org.junit.Assume;
import org.junit.Test;

import com.sun.jna.platform.win32.Advapi32Util;
import com.sun.jna.platform.win32.Advapi32Util.Account;
import com.sun.jna.platform.win32.WinNT.PSID;

public class TestSIDConverter {
	
	private static final String accountNameTest = "[email protected]";
	
	private static void generateCombinations(byte[] sid, int offset) throws Exception {
	    String convertedSid, convertedSid2;
	    if (offset >= sid.length) {
	        convertedSid = Advapi32Util.convertSidToStringSid(new PSID(sid));
	        convertedSid2 = SIDConverter.convertSidToStringSid(sid);
	        if (!convertedSid.equals(convertedSid2)) {
	            throw new Exception("Conversion Error: "
	                + convertedSid2 + " instead of " + convertedSid);  
	        }
	        return;
	    }
	    for (int i = 0; i <= 255; i += 255/3) {
	        sid[offset] = (byte)(i & 0xFF);
	        generateCombinations(sid, offset+1);
	    }
	}

	@Test
	public void testAccount() {
		Assume.assumeNotNull(accountNameTest);
		Account account = Advapi32Util.getAccountByName(accountNameTest);
		assertEquals(account.sidString, SIDConverter.convertSidToStringSid(account.sid));
	}
	
	@Test
	public void testCombinations() throws Exception {
		byte[] sidTemplate = new byte[28];
		sidTemplate[0] = 1;
		generateCombinations(sidTemplate, 1);
	}

}

Greate.

This can work in .net core in linux version to convert objectSid to string value.

Thanks:)

The License is: Do Whatever You Want With It 2.0
aka I don't care, I hope it helps you!