作不下去了(想死的心都有了)，想买代码啦（花钱免死）

做了2个月，没什么进展，郁闷啊
有谁愿意卖透明加解密代码的？联系

手机：13366702836
msn： weng760110@hotmail.com

等等,列出你的具体要求,让我试试看.我在linux上已经搞定了.但windows还是门外汉.不过有具体项目要比漫无目标要强.

linux？？？楼上的兄弟，我需要的是近期能给出的

网上有卖代码的,就怕你个人买不起.tefs, sefs 都有代码卖呀

这个心情我也有，现在在搞加密标记放在文件头部，问题是从来就没有间断过！

tefs, sefs 一般什么价位？（代码）

如果买到个垃圾代码就可以直接见毛主席他老人家了

需求也不说

引用第5楼may于2007-07-25 19:11发表的  :
tefs, sefs 一般什么价位？（代码）

如果我没有记错,tefs的价格超过这儿大部分人一年的薪水..

引用第0楼may于2007-07-25 16:14发表的 作不下去了(想死的心都有了)，想买代码啦（花钱免死） :
做了2个月，没什么进展，郁闷啊
有谁愿意卖透明加解密代码的？联系

手机：13366702836
msn： weng760110@hotmail.com

推荐你买OSR DMK 一步到位。呵呵。 买这个绝对不会亏的

引用第9楼我最老实于2007-07-25 20:21发表的  :


推荐你买OSR DMK 一步到位。呵呵。 买这个绝对不会亏的

不过你才弄了2个月就想弄出来也太着急了。至少也要6个月

OSR DMK是什么东东？

引用第11楼linuxyf于2007-07-26 08:20发表的  :
OSR DMK是什么东东？

tony mason大牛写的一个库，估计是OSR 以前版本的升级。

这鸟玩已以前听说是口碑极品，价格也是极品,可能会超过本论坛大部分人一辈子的工资。很少有人用过，有著名大公司听说有用它的。

则么没牛人反过？？？？

引用第8楼znsoft于2007-07-25 20:19发表的  :



如果我没有记错,tefs的价格超过这儿大部分人一年的薪水..

没这么夸张。 这里一般人3-4个月的薪水足以。

Data Modification Kit (DMK)

Products that encrypt, compress, or otherwise modify file-based data require some of the most complex kernel software developed for Windows. Even for seasoned kernel-mode programmers, the complexity of delivering per-file data modification solutions on Windows is significant. For a development team that is not fortunate enough to include multiple Windows file system and internals experts, the task of actually getting such a product to work can be daunting.

OSR has years of experience working with clients and other members of the development community to deliver such solutions. Now, OSR is going a step further with the introduction of our Data Modification Kit (DMK) . Read on, to find out how the OSR DMK can facilitate the development of per-file data modification solutions for Windows that encompass a broad range of features while maintaining correctness, flexibility, and ease of use.


The Challenge

A common use for a Windows file system filter driver is to extend the base OS to provide support for encryption, compression, or other custom modifications on a per-file basis. We call this "per-file data modification." Often, supporting per-file data modification requires changing the size and format of the data as well as storing additional meta-data with the file. Unfortunately, implementing this level of functionality on Windows is a task riddled with numerous difficulties. Some of the most common difficulties are:

    * Support for executable images - Because the executable image is memory mapped, file system filter drivers are bypassed when they interact with the Windows Virtual Memory system regarding the size of the file-backed section. This can lead to incorrect behavior of the application.

    * Support for memory mapped data files - Any application that uses the Windows file mapping APIs can cause problems. Such applications are common, including Microsoft Word (2003) and Notepad.

    * Support for arbitrary data modification - To simplify the task, existing solutions typically restrict their meta-data additions to affixing a header or trailer to the data. This does not provide them with the ability to perform arbitrary data modifications (such as compression, for example).

    * Support for all standard Windows file systems - Each Windows file system comes with its own set of idiosyncratic behaviors that must be accommodated. And of course, this results in an increased testing burden because each unique scenario has to be scripted, tested, and have its results validated.

    * A changing file system filter model - With Microsoft slowly moving to a newer filter model, most development teams are now faced with the task of having to support the older legacy platforms and yet coexist and work well with the new platforms of the future

    * Subtle, yet crucial, differences among Windows versions - Each version of Windows has introduced changes that affect Windows file systems. Just discovering these changes can be difficult enough; properly accommodating them in a product can be maddening.

There are a number of partial solutions to these issues. However, such solutions can compromise the capabilities of the product and still involve considerable specialized development.


The Solution

The OSR Data Modification Kit (DMK) addresses these complex issues by providing a comprehensive solution for supporting per-file data modification on Windows.

The DMK's primary value is that it provides a ready-made infrastructure that properly deals with Windows' complexities. As a result, regardless of the specifics of your data modification, you need only provide the actual routines that perform the data modification. This simplifies the development process, increases reliability, and decreases the time required to deliver your product to market. Additionally, because the DMK includes source code, it is suitable for use even in highly sensitive projects - everything is available for your inspection, modification, and customization.


Features

The following key features are supported by OSR's DMK:

    * Customizable data modification algorithms. You decide the minimum block size for your algorithm. The DMK calls your data modification function, providing the data requiring modification. In response, your data modification function returns an optional header block plus the transformed data block. Note that the transformed data block need not be the same size as the input data block- you can make it smaller or larger.

      Benefit - Complete flexibility in choice of algorithm for your solution, regardless of minimum block size.

    * Support for multiple, sequential, transformations. Because the OSR DMK allows the output data returned by your library to be any size relative to the input data, you can easily implement multiple transformations.

      Benefit - Implement compression and encryption in your solution (for example), gaining both disk space and performance, and giving your product another advantage for your customer.

    * Support for all file systems. The OSR DMK supports FAT, NTFS, network redirectors, and other Windows file systems.

      Benefit - Flexibility in developing local or remote transformation solutions with support for any underlying Windows file system.

    * Support for Windows versions from Windows 2000. The OSR DMK does the work necessary to ensure proper support of Windows versions starting with Windows 2000 SP 4.

      Benefit - Your product works across all common Windows client and server releases, with no source-code changes to your data transformation library.

    * Data safety. Even if the data modification toolkit is removed from a system that contains transformed files, each transformed file appears as a single file to the base file system, so it can be safely backed up, copied to removable storage, and later re-transformed if required.

      Benefit - Data integrity, including added meta-data, is maintained.

    * Case-by-case file access control. Each time the file is opened, the DMK calls an authorization function that you provide, to perform custom access checks (if desired) and indicate whether file data should be transformed as it is accessed. Alternatively, your transformation library can indicate to the DMK that for a given open file instance the data should be provided as is - without performing any transformation. If your data modification driver is present on both a server and client system, you can (if you wish) shift the work required to transform (or reverse transform) to the client system, distributing workload, potentially decreasing network overhead (e.g., compressed data) and increasing security (e.g., encrypted data).

      Benefit - Implement your own access control scheme to augment the existing Windows implementation as well as control which version of the data will be seen by individual callers.

    * Policy Change. The DMK allows you to change the specific data modification policy for a given file in a reliable and transparent fashion. Thus, the handling of existing files can be changed simply by indicating to the DMK that this should be done.

      Benefit - Provides tremendous flexibility in reconfiguring the product dynamically based upon policy changes.


Architecture
 This diagram graphically shows the high level components that comprise a solution using the OSR Data Modification Kit. While OSR provides the DMK to handle the "nitty gritty" details, you add unique value by providing a "data transformation library" (this is the component that provides compression, encryption or other data modification services) and optionally an auxiliary service that works cooperatively with your data transformation library.

The benefit of this architecture is that it provides you a broad range of options for implementing your product. You can choose to provide a straight-forward, kernel-only data transformation library, or a mixed user/kernel implementation providing flexibility and ease of implementation.


Additional Benefits

Using the DMK provides a number of business advantages as well:

    * Time to Market. Because you no longer need to have your team learn the esoteric details of Windows file system filter drivers, you can have them focus on the value-add provided by your application.

    * Quality. The OSR team has been developing Windows file system filter drivers for over ten years. This is our core competency. Be assured that this is no hollow claim: We've developed the core code behind the most comprehensive, successful, products in the industry.

    * World-class support. When your team has problems or questions, your developers interact with our developers. We enjoy success when our clients enjoy success - so we're here to support your development efforts every step of the way.

    * Broadest feature set. The OSR team has made it possible to provide the best possible set of features. By using the DMK, you can support the broadest range of features within your product - giving your product all the advantages of a solid toolkit plus the unique features only your team can provide.


Applications

The DMK is ideally suited for two specific types of data modification:

    * Encryption. The DMK allows your product to decide if a particular user may access a given file's data; your product also can control whether the user sees the clear or encrypted version of the data. If your product is not installed, the file remains a single intact unit, but the stored data is still in its encrypted form.

    * Data Compression. The DMK allows arbitrary resizing of the data, allowing your product to trivially incorporate data compression. Further, the DMK provides the infrastructure necessary for handling the issues that can arise with data compression.


O/S Support

The DMK provides support for all current versions of Windows:

    * Windows 2000 SP4 URP and beyond

    * Windows XP, all service packs

    * Windows Server 2003

    * Windows Vista (on release)

 

Availability

The OSR Data Modification Kit (DMK)V1.0 was formally released in November 2006.

引用第13楼wowocock于2007-07-26 09:10发表的  :
则么没牛人反过？？？？

不是不想反。关键是很难找到副本。

要是能找到Data Modification Kit (DMK)  的副本（最好是源码）就好了。

Data Modification Kit (DMK) 不知道这套产品具体卖多少钱？？？

引用第18楼linuxyf于2007-07-26 09:18发表的  :
Data Modification Kit (DMK) 不知道这套产品具体卖多少钱？？？

FSK好像是10几万刀。这个估计只能高。