使用CopyFileEx复制另一个用户的加密文件

Question

I want to copy some encrypted files of other user from one computer to another using CopyFileEx API in c#.

CopyFileEx decrypts file before copy to target. Files can be decrypted by the only user who encrypted them.

In this case, I will get error message of Access Denied.

Is there a way using CopyFileEx to achieve this?

Answer 1

It is obvious that to access encrypted file content you should be authorized as specific user. That is the purpose of encryption.

If your task is backup only, you can use ReadEncryptedFileRaw and WriteEncryptedFileRaw pair to backup/restore encrypted files without actually decrypting it.

But if still want to access file encrypted by another user and you have his credentials, you can use impersonation .