How to save CFUUID in keychain

Question

I'm developing an iPhone application.
The application access some web service that aboug other things should recognize the device ID.

Since UDID is deprecated, I need to call CFUUIDCreate to generate my own UUID for this purpose.

The ID is security-sensitive: all my network communication is encrypted, and I don't want nobody but my certificate-authenticated server to know that UUID.
Besides, I want this identifier to survive re-install.
Using the keychain to store that UUID seems like an obvious solution.

How do I do that?

On the internets, there're some samples how to store user name & password in keychain. I have neither user nor password, just 16 bytes UUID (or a single NSString).

Which kSecClass do I need to use?
Which attributes do I need to set and retrieve?
Which attributes are optional and which are mandatory?

What header/framework defines the CSSM_ALGORITHMS?
The doc mentions cssmtype.h, xcode autocompletion has <Security/cssmtype.h> however the xcode compiler says "file not found".

From the common sense, "Identity" should fit best. The docs however say "an identity is the combination of a private key and a certificate", I have neither of them. Also, I don't see the "key bytes" attribute.

Thanks in advance!

Answer 1

You could use the SSKeychain wrapper. Also check out the answer on this question for some basic usage stuff: How to choose account and service values for SSKeychain