From: Milan Broz <gmazyland@gmail.com>
To: Gilad Ben-Yossef <gilad@benyossef.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>,
Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@redhat.com>,
dm-devel@redhat.com
Cc: Ofir Drang <ofir.drang@arm.com>,
Eric Biggers <ebiggers@kernel.org>,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 1/4] crypto: add eboiv as a crypto API template
Date: Fri, 30 Oct 2020 11:33:30 +0100 [thread overview]
Message-ID: <3a4804a5-5d5c-1216-1503-c241cc24f3c2@gmail.com> (raw)
In-Reply-To: <20201029100546.28686-2-gilad@benyossef.com>
On 29/10/2020 11:05, Gilad Ben-Yossef wrote:
>
> +config CRYPTO_EBOIV
> + tristate "EBOIV support for block encryption"
> + default DM_CRYPT
> + select CRYPTO_CBC
> + help
> + Encrypted byte-offset initialization vector (EBOIV) is an IV
> + generation method that is used in some cases by dm-crypt for
> + supporting the BitLocker volume encryption used by Windows 8
> + and onwards as a backwards compatible version in lieu of XTS
> + support.
> +
> + It uses the block encryption key as the symmetric key for a
> + block encryption pass applied to the sector offset of the block.
> + Additional details can be found at
> + https://www.jedec.org/sites/default/files/docs/JESD223C.pdf
This page is not available. Are you sure this is the proper documentation?
I think the only description we used (for dm-crypt) was original Ferguson's Bitlocker doc:
https://download.microsoft.com/download/0/2/3/0238acaf-d3bf-4a6d-b3d6-0a0be4bbb36e/bitlockercipher200608.pdf
IIRC EBOIV was a shortcut I added to dm-crypt because we found no official terminology for this IV.
And after lunchtime, nobody invented anything better, so it stayed as it is now :-)
Milan
next prev parent reply other threads:[~2020-10-30 10:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 10:05 [PATCH v3 0/4] crypto: switch to crypto API for EBOIV generation Gilad Ben-Yossef
2020-10-29 10:05 ` [PATCH v3 1/4] crypto: add eboiv as a crypto API template Gilad Ben-Yossef
2020-10-30 10:33 ` Milan Broz [this message]
2020-10-30 11:20 ` Gilad Ben-Yossef
2020-10-29 10:05 ` [PATCH v3 2/4] crypto: add eboiv(cbc(aes)) test vectors Gilad Ben-Yossef
2020-10-29 10:05 ` [PATCH v3 3/4] dm crypt: switch to EBOIV crypto API template Gilad Ben-Yossef
2020-10-29 10:05 ` [PATCH v3 4/4] crypto: ccree: re-introduce ccree eboiv support Gilad Ben-Yossef
2020-12-02 8:29 ` [PATCH v3 0/4] crypto: switch to crypto API for EBOIV generation Gilad Ben-Yossef
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