On Tue, Jan 26, 2010 at 4:58 PM, Milan Broz <mbroz@xxxxxxxxxx> wrote: > On 01/26/2010 09:41 AM, Bai Shuwei wrote: >> Hello, everyone: >> i add one line in the setkey function which is in xts.c file to >> print the in_key value. I find the key value not same i set in the >> keyfile by cryptsetup >> >> my command is >> # cryptsetup luksFormat -d my_keyfile -c xts-aes-plain -s 256 /dev/loop0 > > -d is key file for key slot (passphrase), volume (master) key for encryption > is generated using RNG during luksFormat inside cryptsetup. > > You can use pre-generated master key using --master-key-file in cryptsetup 1.1.x > (but note it reads raw input, not hexa encoding). See man page. > > You do not need to modify xts.c btw, try "dmsetup table --showkeys" for active > dm-crypt mappings to show used volume key. > > (and also better use dm-crypt@xxxxxxxx mailing list for questions related to > userspace cryptsetup) > > Milan > -- > mbroz@xxxxxxxxxx > Hi, thanks Milan firstly! I use "dmsetup table --showkeys" get the bellow information. disk$ sudo dmsetup table --showkeys /dev/mapper/dsi0 0 2040 crypt aes-xts-plain 3131313131313131313131313131313131313131313131313131313131313131 0 7:0 2056 If i forget the passphase, can i use the above information/key to recovery my disk? Best Regards Bai Shuwei -- Love other people, as same as love yourself! Don't think all the time, do it by your hands! E-Mail: baishuwei@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
