Obtain a unique hardware identifier in C++ in Windows

Question

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Reliable way of generating unique hardware ID

I would like to retrieve an unique hardware identifier for a single machine in C++. Any suggestions? I need this software working in Windows XP, Vista, 7, 8. I just need a few system calls to retrieve MAC address, hard disk serial number, or something like this.

Solution

Encrypt any value with the machine's DPAPI key and use the encrypted value as your ID.

Note: I copied my original answer to the question that this one duplicates.

Comments

[ahmd0]

DPAPI will use PBKDF2 encryption method that uses random "salt", which will produce a resulting cipher text with random values every time you generate it. So unless you specify how to make PBKDF2 not use random "salt" (I'm guessing, via CryptProtectData API) I don't see how your suggestion would work? More info: msdn.microsoft.com/en-us/library/ms995355.aspx