[Swlug] mount disk image file with encryption

[Mark Einon]

Hi Bascule,

A little tip - the disk type is GPT so fdisk won't work, gparted or
gdisk will.

Best regards,

Mark

On Mon, 2020-11-23 at 19:28 +0000, bascule via Swlug wrote:
> i have a failing microsd card, i've made an image of it but i can't
> find the 
> right arguments to access the contents of the image file.
> 
> the card is adopted storage from an android phone and i have the key,
> using 
> the physical card i can access it using:
> dmsetup create crypt1 --table "0 `blockdev --getsize /dev/sdf2` crypt
> aes-cbc-
> essiv:sha256 `cat key` 0 /dev/sdf2 0"
> 
> and then mounting.
> 
> but while fdisk sdcard_img shows:
> [root at mycroft bascule]# fdisk sdcard_img
> 
> Welcome to fdisk (util-linux 2.33.2).
> Changes will remain in memory only, until you decide to write them.
> Be careful before using the write command.
> 
> 
> Command (m for help): p
> Disk sdcard_img: 119.8 GiB, 128579534848 bytes, 251131904 sectors
> Units: sectors of 1 * 512 = 512 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disklabel type: gpt
> Disk identifier: B826F4C0-DC80-4670-A4A7-F99A7314FF9F
> 
> Device      Start       End   Sectors   Size Type
> sdcard_img1  2048     34815     32768    16M unknown
> sdcard_img2 34816 251131870 251097055 119.7G unknown
> 
> 
> i don't know how to reference the 2nd 'partition' on the image file
> for the 
> dmsetup command.
> since making the image file the card seems to be failing more and more
> so i 
> wish to extract files from the image file
> can someone help me?
> 
> bascule
> 
> 
> 

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