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Create multiple nested secure disk images
I believe that AES 128 encrypted disk images are the only choice with hdiutil. this is not necessarily a limitation of hdiutil itself, but a limitation of the current framework which hdiutil uses for working with disk images.
"/System/Library/PrivateFrameworks/DiskImages.framework" If this is indeed the case, then it may be possible to use stronger encryption in future versions of OS X. The hdiutil man page indicates that the default specification, or [crypto_method], used by the the hdiutil create -encryption option is called CEncryptedEncoding. After searching the OS X 10.3.7 filesystem, the Apple Developer Connection, and the WWW in general, I have found no mention of any possible alternative specifications. Furthermore, if there were such an alternative, there would have to be mention of it in a framework somewhere otherwise such an image would be unrecognizable/unmountable. For the curious, there is a file called CEncryptionEncoding.strings located with "/System/Library/PrivateFrameworks/DiskImages.framework/Versions/A/Resources/English.lproj/" which simply provides some strings for use with Disk Utility. To create an AES 128 encrypted disk image from the command line, from a folder named "MyFolder" located on the desktop, one could type the following: hdiutil create -encryption -srcfolder ~/Desktop/MyFolder ~/Desktop/MyFolder.dmg after being prompted for a password, the resulting image should be created on the desktop.
Create multiple nested secure disk images
I'm trying to do this on my clients OSX server and I get no propt for a pass word .. they only way it works is to put the passphrase as a comandline arg ( kinda defats the point ) |
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