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OSX 10.14 Mojave - man page for csgather (mojave section 1)

csgather(1)						    BSD General Commands Manual 					       csgather(1)

NAME
csgather -- Gather CoreStorage metadata for diagnosis
SYNOPSIS
csgather -G dir device ... csgather -r mountPoint [-o filename]
DESCRIPTION
csgather gathers CoreStorage metadata for diagnosis. It works in two modes. In the first mode where -G and a list of devices are provided, CoreStorage metadata on these list of devices will be collected. The col- lected information includes the size and UUID of the CoreStorage logical and physical volumes, the name of the logical volumes, the wrapped (encrypted) volume key (which can only be decrypted by a brute-force attack), user name and user login image file. No other user information (such as directory structure, file names, file content, etc) is collected. In the second mode where -r is provided, the encryption context which includes the wrapped volume key (which can only be decrypted by a brute-force attack), user name and user login image file will be collected. If the wrapped volume key is decrypted by a brute-force attack, the volume key used to encrypt data on CoreStorage Logical Volumes is in the clear. It is not mathematically possible to derive the user's passphrase from the volume key. The volume key is only useful when the attacker has access to the encrypted data in the CoreStorage Logical Volume, which are not collected by csgather. The following options are available: -G dir Gather all CoreStorage metadata and write into the specified directory. The given directory must not already exist. -o filename Specify the output file generated by the -r option. If not given, use standard output. -r mountPoint Find out the CoreStorage logical volume identified by the given mount point, and print its encryption context to the file given in the -o option.
SEE ALSO
csdiagnose(1)
HISTORY
The csgather utility first appeared along with CoreStorage in OS X 10.10.0.
OS X
July 24, 2019 OS X

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