How to retrieve user name and password of pppoe internet connection usinf WinAPI?

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How to retrieve username and password of pppoe internet connection using WinAPI? which functions should be used to do this?

Posted 22-Oct-14 19:52pm

Igor-84

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Sergey Alexandrovich Kryukov 23-Oct-14 2:05am

There is no such function. To start with, there are no cases when a password can be retrieved or even known to anyone except the person who created it. It would be too unsafe and absolutely not needed for authentication. Surprised? :-)
—SA

Igor-84 23-Oct-14 2:23am

And how Dialupas program gets the username and password in this case?

Richard MacCutchan 23-Oct-14 4:16am

You can't; it would be a serious breach of security to allow anyone to access this information.

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Gokulnath007 · Answer 1 · 2014-10-29T00:27:00

Solution 2

http://whatismyipaddress.com/ppp-pppoe[^]

Posted 29-Oct-14 0:27am

Gokulnath007

bling · Answer 2 · 2014-10-27T06:59:00

Solution 1

I don't think you'll find anything on MSDN. It is possible to do this but the mechanism for storing username and password varies by modem.

Here's a blog that describes several utilities to do this:

How to recover lost ADSL password or other ISP password

Edit: the previous draft contained a link to a similar utility on a web site with domain named "hack-tools". I think Richard was objecting to this (see comments below).

The assumption is the username / password is stored on the host PC in a file or the registry. It might not be.

The following exercise should locate the information:

Export your registry to a text file.

Change your PPPoE user name or password through the PPPoE client software.

Re-Export your registry to a different text file.

Compare the two files (eg. use a tool like WinMerge).

Search your disk for any files with a modified time stamp in between the time stamps of the two exported registry files.

If the information was found in a file, use the Windows file I/O or standard C I/O functions.

Opening a File for Reading or Writing

If the information is in the registry, use this API:

Registy Reference

Good luck.

Posted 27-Oct-14 6:59am

bling

Updated 27-Oct-14 13:02pm

v2

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Richard MacCutchan 27-Oct-14 13:59pm

Please do not post information about hacking.

[no name] 27-Oct-14 18:36pm

Hi Richard;

Define hacking. Is this a bad thing?

You replied above this can't be done. I've posted a link that shows it can be done. Maybe you're offended that link contains the work "hack" in the domain name. Here's another link that doesn't.

http://www.nirsoft.net/utils/router_password_recovery.html

The OP asked how this might be done in Windows API. If the data is in the registry or file system, it most certainly falls under the Windows API.

If you're implying the OP has ill intent, take that up with OP.

Richard MacCutchan 28-Oct-14 4:31am

No, I object to your answer. If people are asking how to recover passwords then they may well be wanting that information for illegal purposes. This site does not condone such activities.

[no name] 28-Oct-14 18:21pm

Sounds like you are judging myself and the OP to have criminal intent. That's very offensive, Richard. I strongly disagree with your logic.

People who shy away from security issues are doomed to suffer from poor security. There are plenty of articles here to underscore that point.

http://www.codeproject.com/Articles/11443/DPAPI-and-Triple-DES-A-powerful-combination-to-sec

Do you know how safely store data on your personal device? Unless you're an expert in cryptography, that can be very difficult. Here's an API you and the OP can use to protect your data. It's what some of these lazy vendors should be using.

http://msdn.microsoft.com/en-us/library/ms995355.aspx

It's super easy. Look for CryptProtectData and CryptUnprotectData.

The resulting file is effectively DRM'd to the local machine (or local machine and logged in user). Switch to a different user id, or copy to a different machine and the file won't work.

Please don't go around insinuating your fellow CPers are crooks. It's rude, offensive, and just plain wrong.

Richard MacCutchan 29-Oct-14 4:23am

I'm not judging. I am just saying that people who ask for methods to find or decrypt passwords may have innocent intent, but publishing that information makes it available to those who do not. And if the OP is innocent, and owns the system in question, then why does he (or she) need some code to discover the username and password? Questions like this are always suspicious.

[no name] 29-Oct-14 12:10pm

Richard - you contradict yourself. You say you're "not judging" but then judge us "suspicious". I don't believe it is your intent to malign anyone, but your words don't match.

Richard MacCutchan 29-Oct-14 12:17pm

If you actually read what I wrote I am not judging anyone. I merely said Questions like this are always suspicious.

[no name] 29-Oct-14 15:26pm

Sigh. Go back to your first reply.

"If people are asking how to recover passwords then they may well be wanting that information for illegal purpose."

The OP did ask how to recover password for a PPPoE device. You *may* as well have said the OP *may* be a criminal.

Sorry, not letting you off that easy.

Richard MacCutchan 30-Oct-14 4:16am

I said may which does not imply does, and I did not suggest that the OP is a criminal. All of this is down to you totally misinterpreting my words.

Igor-84 29-Oct-14 16:21pm

I don’t intend to use this solution in illegal way – I’m writing it for my own convenience. The fact is that people, whose computers I’m serving, usually forget or even don’t know their passwords and logins. Sometimes it becomes a great problem. That’s why I decided to add this feature to my program.
Yet I found the solution. It uses 3 WinAPI functions, which names I can’t say because of the reasons described above.