On 01/27/2010 04:21 AM, Bai Shuwei wrote: > On Tue, Jan 26, 2010 at 4:58 PM, Milan Broz <mbroz@xxxxxxxxxx> wrote: > 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? yes, if you know mapping table (iow: key, cipher and mode, IV and device offset), you can map this device directly using dmsetup. (try dmsetup create dsi0 --table "0 2040 crypt .... 7:0 2056") Anyway, you can better backup LUKS header and use some other passphrase, there is also volume_key project, which implements key escrow (for cryptsetup too). Milan -- 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
