Steamless/Steamless.Unpacker.Variant20.x86/Classes/SteamStubHeader.cs

/**
 * Steamless - Copyright (c) 2015 - 2022 atom0s [atom0s@live.com]
 *
 * This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
 * To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ or send a letter to
 * Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
 *
 * By using Steamless, you agree to the above license and its terms.
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 *                    made. You must do so in any reasonable manner, but not in any way that suggests the licensor
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 *
 *   Non-Commercial - You may not use the material (Steamless) for commercial purposes.
 *
 *   No-Derivatives - If you remix, transform, or build upon the material (Steamless), you may not distribute the
 *                    modified material. You are, however, allowed to submit the modified works back to the original
 *                    Steamless project in attempt to have it added to the original project.
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namespace Steamless.Unpacker.Variant20.x86.Classes
{
    using System;
    using System.Runtime.InteropServices;

    /// <summary>
    /// SteamStub DRM Variant 2.0 Header
    /// 
    /// Size: 856 bytes
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SteamStub32Var20_856_Header
    {
        public uint XorKey1;                   // Xor key used to encode the header data.
        public uint XorKey2;                   // Xor key used to encode the header data.
        public uint GetModuleHandleA_idata;    // The address of GetModuleHandleA inside of the .idata section.
        public uint GetProcAddress_idata;      // The address of GetProcAddress inside of the .idata section.
        public uint GetModuleHandleW_idata;    // The address of GetModuleHandleW inside of the .idata section.
        public uint Flags;                     // Protection flags used with the file.
        public uint Unknown0000;               // Unknown (Used as part of a hash check when (Flags & 0x10) is set.)
        public uint BindSectionVirtualAddress; // The virtual address to the .bind section.
        public uint BindSectionCodeSize;       // The size of the code stub inside of the .bind section.
        public uint BindSectionHash;           // Hash that is calculated based on the .bind code section and .bind stub header data. (Only used if (Flags & 1) is set.)
        public uint OEP;                       // The original file OEP to be invoked after the stub has finished.
        public uint CodeSectionVirtualAddress; // The virtual address to the code section. (.text)
        public uint CodeSectionSize;           // The size of the code section.
        public uint CodeSectionXorKey;         // The starting key to xor decode against. (Only used if (Flags & 4) is set.)
        public uint SteamAppId;                // The steam application id of the packed file.

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x08)]
        public byte[] SteamAppIDString; // The SteamAppID of the packed file, in string format.

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x314)]
        public byte[] StubData; // Misc stub data, such as strings, error messages, etc.
    }

    /// <summary>
    /// SteamStub DRM Variant 2.0 Header
    /// 
    /// Size: 884 bytes
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SteamStub32Var20_884_Header
    {
        public uint XorKey1;                   // Xor key used to encode the header data.
        public uint XorKey2;                   // Xor key used to encode the header data.
        public uint GetModuleHandleA_idata;    // The address of GetModuleHandleA inside of the .idata section.
        public uint GetProcAddress_idata;      // The address of GetProcAddress inside of the .idata section.
        public uint LoadLibraryA_idata;        // The address of LoadLibraryA inside of the .idata section.
        public uint GetProcAddress_custom;     // The address of the custom GetProcAddress implementation function.
        public uint Flags;                     // Protection flags used with the file.
        public uint Unknown0000;               // Unknown (Used as part of a hash check when (Flags & 0x10) is set.)
        public uint BindSectionVirtualAddress; // The virtual address to the .bind section.
        public uint BindSectionCodeSize;       // The size of the code stub inside of the .bind section.
        public uint BindSectionHash;           // Hash that is calculated based on the .bind code section and .bind stub header data. (Only used if (Flags & 1) is set.)
        public uint OEP;                       // The original file OEP to be invoked after the stub has finished.
        public uint CodeSectionVirtualAddress; // The virtual address to the code section. (.text)
        public uint CodeSectionSize;           // The size of the code section.
        public uint CodeSectionXorKey;         // The starting key to xor decode against. (Only used if (Flags & 4) is set.)
        public uint SteamAppId;                // The steam application id of the packed file.

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x08)]
        public byte[] SteamAppIDString; // The SteamAppID of the packed file, in string format.

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x32C)]
        public byte[] StubData; // Misc stub data, such as strings, error messages, etc.
    }

    /// <summary>
    /// SteamStub DRM Variant 2.0 Header
    /// 
    /// Size: 952 bytes
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public struct SteamStub32Var20_952_Header
    {
        public uint XorKey1;                    // Xor key used to encode the header data.
        public uint XorKey2;                    // Xor key used to encode the header data.
        public uint GetModuleHandleA_idata;     // The address of GetModuleHandleA inside of the .idata section.
        public uint GetProcAddress_idata;       // The address of GetProcAddress inside of the .idata section.
        public uint GetModuleHandleW_idata;     // The address of GetModuleHandleW inside of the .idata section.
        public uint GetProcAddress_bind;        // The address of the .bind sections custom GetProcAddress instance.
        public uint Flags;                      // Protection flags used with the file.
        public uint Unknown0000;                // Unknown (Used as part of a hash check when (Flags & 0x10) is set.)
        public uint BindSectionVirtualAddress;  // The virtual address to the .bind section.
        public uint BindSectionCodeSize;        // The size of the code stub inside of the .bind section.
        public uint BindSectionHash;            // Hash that is calculated based on the .bind code section and .bind stub header data. (Only used if (Flags & 1) is set.)
        public uint OEP;                        // The original file OEP to be invoked after the stub has finished.
        public uint CodeSectionVirtualAddress;  // The virtual address to the code section. (.text) (Was 0x0401000 when testing. Possibly original OEP?)
        public uint CodeSectionSize;            // The size of the code section.
        public uint CodeSectionXorKey;          // The starting key to xor decode against. (Only used if (Flags & 4) is set.)
        public uint SteamAppID;                 // The steam application id of the packed file.

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x0C)]
        public byte[] SteamAppIDString;         // The SteamAppID of the packed file, in string format.

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x36C)]
        public byte[] StubData;                 // Misc stub data, such as strings, error messages, etc.
    }
}