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https://github.com/raspberrypi/linux/issues/1312
Feb 29, 2016 · Check that kernel supports aes-cbc-essiv:sha256 cipher (check syslog for more info). I've inserted numerous crypto kernel modules I could find (aes, sha256, and variations thereof I found on my other systems), but sadly to no avail. Is there any way for me to solve this, or is this really a bug in the kernel, cryptsetup, or possibly my own fault?
https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/dm-crypt.html
aes-cbc-essiv:sha256 aes-xts-plain64 serpent-xts-plain64 Cipher format also supports direct specification with kernel crypt API format (selected by capi: prefix). The …
https://www.centos.org/forums/viewtopic.php?t=30503
Jan 09, 2009 · Check kernel for support for aes-cbc-essiv:sha256 cipher spec and verify that /dev/sda3 contains at least 133 sectors. Failed to read from key storage. maybe also problem with mkinitrd ?
https://forums.gentoo.org/viewtopic-p-4430639.html
Oct 29, 2007 · Check kernel for support for the aes-cbc-essiv:sha256 cipher spec and verify that /dev/sda7 contains at least 383 sectors. Failed to write to key storage. Command failed.
https://patchwork.kernel.org/patch/9795327/
This patch adds support for using AES-128-CBC for file contents and AES-128-CBC-CTS for file name encryption. To mitigate watermarking attacks, IVs are generated using the ESSIV algorithm. While AES-CBC is actually slightly less secure than AES-XTS from a security point of view, there is more widespread hardware support.
http://lkml.iu.edu/hypermail/linux/kernel/1704.3/02133.html
> an expert on ESSIV really should weigh in, but my intuition is that you > really only need to be using AES-128, using the first 'keysize' bytes of the > hash.
http://lkml.iu.edu/hypermail/linux/kernel/1704.3/01912.html
Next in thread: David Gstir: "Re: [PATCH v2] fscrypt: Add support for AES-128-CBC" Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Hi Daniel and David,
https://nelenkov.blogspot.com/2015/05/hardware-accelerated-disk-encryption-in.html
dm-crypt parses the cipher specification (aes-cbc-essiv:sha256 in stock Android) passed as part of its mapping table and instantiates the corresponding transforms via the kernel crypto API. Thus in order to have dm-crypt use hardware acceleration, one has to either register a hardware-backed AES implementation with a high priority (which may affect other kernel services), or use a unique AES ...
https://mbroz.fedorapeople.org/talks/LinuxAlt2008-eng/dmcrypt-eng.pdf
block device – atomic unit is sector in Linux sector always 512 bytes, random access sectors encrypted independently (sectors contains random data before write) encryption algorithm uses block <= sector block is ususually 128bits (16 bytes) last block has the same size as others disc encryption key + IV... block1 (~16bytes) sector (512bytes)
http://dcslab.hanyang.ac.kr/nvramos/nvramos16/presentation/s5.pdf
Linux Kernel Encryption Support for File system Kyungsik Lee SW Platform Lab., Corporate R&D LG Electronics, Inc. ... Advanced Encryption Standard ... aes-xts dm-crypt, aes-cbc-essiv:sha256 10. Sequential Read Prefetching •Readahead 11 0 50 100 150 200 250
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