![]() ![]() If no problems occur, the contents of the encrypted block device should not be accessible directly from the block device. ![]() Use the legacy command cryptsetup-reencrypt:.If it has been, unmount and use cryptsetup luksClose to close it. Make sure that the block device to be decrypted has not been opened by cryptsetup (there is no entry under `/dev/mapper/`, let alone mounted.Identify your block device using blkid, lsblk, etc'.reboot into a live environment using a USB stick.Verify that your block device has a LUKS1 header (and not LUKS2) using cryptsetup luksDump.Decrypting LUKS1 devices in-placeĭecryption is done in offline mode, using the (noq legacy) cryptsetup-reencrypt command. You should always backup your drive and LUKS headers before proceeding, to protect your data from accidents during decryption. Warning: The procedures which follow are inherently risky and may cause catastrophic data loss. unmount not required) decryption are supported. LUKS1 decryption only supported offline mode decryption.įor LUKS2 devices, both offline and online (i.e. Support for non-destructive offline decryption of LUKS1 devices has been available starting with cryptsetup version 1.5.0, which was released in 2012. The terms used by cryptsetup's documentation for this is "decryption." The files in the filesystem will remain intact. Performing in-place decryption will remove the LUKS signature, and place the ext4 filesystemĭirectly on the partition, so that you can mount it directly. For example, if you have an ext4 filesystem living inside a LUKS-encrypted partition, See cryptsetup-reencrypt(8) (Discuss in Talk:Removing system encryption) OverviewĪlthough not as safe as backing up your data and restoring it on to a reformatted device,Ĭryptsetup does allow the user to permanently remove the LUKS encryption from a device in-place. Reason: cryptsetup-reencrypt tool has been removed as of cryptsetup 2.5.0. ![]()
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