On 22 May '08, at 3:32 AM, Ruotger Skupin wrote:
To protect sensitive user data I attach an encrypted disk image and store the application data there.
Interesting. FYI, if the data is fairly small you can store it directly in a Keychain item(s), but for large amounts of data a disk image is a good idea.
-certificate certificate_filespecify a secondary access certificate for the image being created.-pubkey PK1,PK2,...,PKnspecify a list of public key hashes in ASCII hex for the image being created. The hash(s) will be used to locate a public key used to protect an encrypted image.Is there any example code how to do this in Cocoa?
I don't know, as I haven't used hdiutil. None of the relevant technologies have Cocoa APIs, so if there are examples they're most likely C code, but you could use them in a Cocoa app.
To work with certificates or public keys you'll need to use the Keychain or CDSA (or openssl) APIs. I've found the 3rd party open- source Keychain.framework (keychain.sourceforge.net) invaluable for working with those, as it offers a lot of high-level Cocoa wrappers.
Furher discussion should probably go to either the filesystem-dev or apple-cdsa mailing lists. (The latter, despite its cryptic name, covers crypto and security APIs.)
—Jens
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