linux-kernel - Re: [PATCH v3 2/2] fscrypt: Add SM4 XTS/CTS symmetric algorithm support

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Message-ID: <1a5e57be-ccff-f281-6e06-be5e59db1d05@gmail.com>
Date:   Mon, 28 Nov 2022 20:33:54 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>,
        Eric Biggers <ebiggers@...nel.org>,
        "Theodore Y. Ts o" <tytso@....edu>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Jonathan Corbet <corbet@....net>, Jens Axboe <axboe@...nel.dk>,
        Ard Biesheuvel <ardb@...nel.org>,
        linux-fscrypt@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-block@...r.kernel.org
Subject: Re: [PATCH v3 2/2] fscrypt: Add SM4 XTS/CTS symmetric algorithm
 support

On 11/25/22 19:16, Tianjia Zhang wrote:
> SM4 is a symmetric algorithm widely used in China, and is even mandatory
> in many scenarios. We need to provide these users with the ability to
> encrypt files or disks using SM4-XTS, and many other algorithms that use
> SM2/3/4 algorithms or their combined algorithm scenarios, these features
> are demanded by many users, this patch enables to use SM4-XTS mode to
> encrypt file content, and use SM4-CBC-CTS to encrypt filename.
> 

Similar reply as [1]. That is, better say:

```
Add support for XTS and CTS mode variant of SM4 algorithm, in similar
fashion to SM2 and SM3. The former is used to encrypt file contents, while
the latter (SM4-CBC-CTS) is used to encrypt filenames. 
```

Thanks.

[1]: https://lore.kernel.org/linux-doc/42624542-6ccb-26a5-db98-d7944972246e@gmail.com/

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