Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results

Home NTDEV

Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging


The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.


Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/


EFS question

OSR_Community_UserOSR_Community_User Member Posts: 110,217
I'm new to this list, so excuse me if my question is addressed improperly.
I need help with AddUsersToEncryptedFile() function usage or rather
how to use EFS_CERTIFICATE_BLOB type.
How to get EFS_CERTIFICATE_BLOB for particular user?
Unfortunately, I was unable to find any examples regarding this specific API
call.
Any code sample would be great.

Any help would be appreciated!

Sincerely,

Serge Melnichenko
Previo Estonia

Comments

  • OSR_Community_UserOSR_Community_User Member Posts: 110,217
    I wonder how many people might have tried this specific thing.

    My experience with many of these CryptoAPI functions was not very good.
    Sometimes they just don't work anyway.

    Apart from the documentation in the Platform SDK there is just luck, understanding & hit-n-trial that can work.

    I also recall someone from Microsoft telling me about 6 months back that CryptoAPI 2.0 doesn't support adding multiple users to an encrypted file. Although I could find documentation & APIs mentioned in this regard.
    ----- Original Message -----
    From: Serge Melnichenko
    To: NT Developers Interest List
    Sent: Wednesday, May 10, 2000 6:14 PM
    Subject: [ntdev] EFS question


    I'm new to this list, so excuse me if my question is addressed improperly.
    I need help with AddUsersToEncryptedFile() function usage or rather
    how to use EFS_CERTIFICATE_BLOB type.
    How to get EFS_CERTIFICATE_BLOB for particular user?
    Unfortunately, I was unable to find any examples regarding this specific API call.
    Any code sample would be great.

    Any help would be appreciated!

    Sincerely,

    Serge Melnichenko
    Previo Estonia
  • OSR_Community_UserOSR_Community_User Member Posts: 110,217
    Hey the API is no big deal man.

    U should be able to find it in either NTFS in FS Section or CyptoAPI Section in Platform SDK.

    That is where I recall, I found it, its been 7-8 months.
    ----- Original Message -----
    From: Serge Melnichenko
    To: Mayank Kulshreshtha (E-mail)
    Sent: Thursday, May 11, 2000 7:32 PM
    Subject: RE: [ntdev] Re: EFS question


    Thanks for you help!
    That would be great if you find the mentioned documentation & APIs.

    Thank you in advance,
    Serge
    -----Original Message-----
    From: Mayank Kulshreshtha [mailto:[email protected]]
    Sent: Wednesday, May 10, 2000 3:04 PM
    To: NT Developers Interest List
    Subject: [ntdev] Re: EFS question


    I wonder how many people might have tried this specific thing.

    My experience with many of these CryptoAPI functions was not very good.
    Sometimes they just don't work anyway.

    Apart from the documentation in the Platform SDK there is just luck, understanding & hit-n-trial that can work.

    I also recall someone from Microsoft telling me about 6 months back that CryptoAPI 2.0 doesn't support adding multiple users to an encrypted file. Although I could find documentation & APIs mentioned in this regard.
    ----- Original Message -----
    From: Serge Melnichenko
    To: NT Developers Interest List
    Sent: Wednesday, May 10, 2000 6:14 PM
    Subject: [ntdev] EFS question


    I'm new to this list, so excuse me if my question is addressed improperly.
    I need help with AddUsersToEncryptedFile() function usage or rather
    how to use EFS_CERTIFICATE_BLOB type.
    How to get EFS_CERTIFICATE_BLOB for particular user?
    Unfortunately, I was unable to find any examples regarding this specific API call.
    Any code sample would be great.

    Any help would be appreciated!

    Sincerely,

    Serge Melnichenko
    Previo Estonia
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. Sign in or register to get started.

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Kernel Debugging 13-17 May 2024 Live, Online
Developing Minifilters 1-5 Apr 2024 Live, Online
Internals & Software Drivers 11-15 Mar 2024 Live, Online
Writing WDF Drivers 20-24 May 2024 Live, Online