From patchwork Thu Apr 30 16:18:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 11520899 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 251B5912 for ; Thu, 30 Apr 2020 16:20:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09005208C3 for ; Thu, 30 Apr 2020 16:20:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588263612; bh=ORjljVOjhf/2+iwPRot8U36ehoPt3y93WEknPAl6A+o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GAuKsE2SIIQBV7eHU/Kw4MyztuqUFrJG75BQABjkCtZJd3XAGnkKfulALYe5uo2pJ X4TSOKjWUUEa4QMIq5SK/w6Ybu3dLn9hV2K+dmiMpAKxXJhcCJsJm/MAGAua+jBdOo LaWFOFkNVVIStSaTtqqkvk4FQV+zQN841/PPCzso= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728103AbgD3QSj (ORCPT ); Thu, 30 Apr 2020 12:18:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:58534 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726309AbgD3QSi (ORCPT ); Thu, 30 Apr 2020 12:18:38 -0400 Received: from mail.kernel.org (ip5f5ad5c5.dynamic.kabel-deutschland.de [95.90.213.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A6EE3208C3; Thu, 30 Apr 2020 16:18:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588263517; bh=ORjljVOjhf/2+iwPRot8U36ehoPt3y93WEknPAl6A+o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E8HOAePBXi6WI+jzMe8alh7NPftqSNmZllGrIna0V9+8gVsCkxSEctza4NQfjYFrg PDc92ajWS6VHX3K0N7wiY/mDUQxz68+dHpsPWN3xy4mlhU/tKzi/370OrediB6aX/a fv51/qsAaKLzJhFChZ7+yl+EXRhaRhPPYkU7l5bo= Received: from mchehab by mail.kernel.org with local (Exim 4.92.3) (envelope-from ) id 1jUBtT-00Axgm-U6; Thu, 30 Apr 2020 18:18:35 +0200 From: Mauro Carvalho Chehab To: Linux Doc Mailing List Cc: Mauro Carvalho Chehab , linux-kernel@vger.kernel.org, Jonathan Corbet , Herbert Xu , "David S. Miller" , linux-crypto@vger.kernel.org Subject: [PATCH v4 03/19] docs: crypto: convert api-intro.txt to ReST format Date: Thu, 30 Apr 2020 18:18:17 +0200 Message-Id: <112b12acb7b6c7ea339171c88c3cf93a183b11ac.1588263270.git.mchehab+huawei@kernel.org> X-Mailer: git-send-email 2.25.4 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org - Change title markups; - Mark literal blocks; - Use list markups at authors/credits; - Add blank lines when needed; - Remove trailing whitespaces. Signed-off-by: Mauro Carvalho Chehab --- .../crypto/{api-intro.txt => api-intro.rst} | 186 ++++++++++-------- Documentation/crypto/index.rst | 1 + 2 files changed, 100 insertions(+), 87 deletions(-) rename Documentation/crypto/{api-intro.txt => api-intro.rst} (70%) diff --git a/Documentation/crypto/api-intro.txt b/Documentation/crypto/api-intro.rst similarity index 70% rename from Documentation/crypto/api-intro.txt rename to Documentation/crypto/api-intro.rst index 45d943fcae5b..bcff47d42189 100644 --- a/Documentation/crypto/api-intro.txt +++ b/Documentation/crypto/api-intro.rst @@ -1,7 +1,11 @@ +.. SPDX-License-Identifier: GPL-2.0 - Scatterlist Cryptographic API - -INTRODUCTION +============================= +Scatterlist Cryptographic API +============================= + +Introduction +============ The Scatterlist Crypto API takes page vectors (scatterlists) as arguments, and works directly on pages. In some cases (e.g. ECB @@ -13,22 +17,23 @@ so that processing can be applied to paged skb's without the need for linearization. -DETAILS +Details +======= At the lowest level are algorithms, which register dynamically with the API. 'Transforms' are user-instantiated objects, which maintain state, handle all -of the implementation logic (e.g. manipulating page vectors) and provide an -abstraction to the underlying algorithms. However, at the user +of the implementation logic (e.g. manipulating page vectors) and provide an +abstraction to the underlying algorithms. However, at the user level they are very simple. -Conceptually, the API layering looks like this: +Conceptually, the API layering looks like this:: [transform api] (user interface) [transform ops] (per-type logic glue e.g. cipher.c, compress.c) [algorithm api] (for registering algorithms) - + The idea is to make the user interface and algorithm registration API very simple, while hiding the core logic from both. Many good ideas from existing APIs such as Cryptoapi and Nettle have been adapted for this. @@ -44,21 +49,21 @@ one block while the former can operate on an arbitrary amount of data, subject to block size requirements (i.e., non-stream ciphers can only process multiples of blocks). -Here's an example of how to use the API: +Here's an example of how to use the API:: #include #include #include - + struct scatterlist sg[2]; char result[128]; struct crypto_ahash *tfm; struct ahash_request *req; - + tfm = crypto_alloc_ahash("md5", 0, CRYPTO_ALG_ASYNC); if (IS_ERR(tfm)) fail(); - + /* ... set up the scatterlists ... */ req = ahash_request_alloc(tfm, GFP_ATOMIC); @@ -67,18 +72,19 @@ Here's an example of how to use the API: ahash_request_set_callback(req, 0, NULL, NULL); ahash_request_set_crypt(req, sg, result, 2); - + if (crypto_ahash_digest(req)) fail(); ahash_request_free(req); crypto_free_ahash(tfm); - + Many real examples are available in the regression test module (tcrypt.c). -DEVELOPER NOTES +Developer Notes +=============== Transforms may only be allocated in user context, and cryptographic methods may only be called from softirq and user contexts. For @@ -91,7 +97,8 @@ size (typically 8 bytes). This prevents having to do any copying across non-aligned page fragment boundaries. -ADDING NEW ALGORITHMS +Adding New Algorithms +===================== When submitting a new algorithm for inclusion, a mandatory requirement is that at least a few test vectors from known sources (preferably @@ -119,132 +126,137 @@ Also check the TODO list at the web site listed below to see what people might already be working on. -BUGS +Bugs +==== Send bug reports to: -linux-crypto@vger.kernel.org -Cc: Herbert Xu , + linux-crypto@vger.kernel.org + +Cc: + Herbert Xu , David S. Miller -FURTHER INFORMATION +Further Information +=================== For further patches and various updates, including the current TODO list, see: http://gondor.apana.org.au/~herbert/crypto/ -AUTHORS +Authors +======= -James Morris -David S. Miller -Herbert Xu +- James Morris +- David S. Miller +- Herbert Xu -CREDITS +Credits +======= The following people provided invaluable feedback during the development of the API: - Alexey Kuznetzov - Rusty Russell - Herbert Valerio Riedel - Jeff Garzik - Michael Richardson - Andrew Morton - Ingo Oeser - Christoph Hellwig + - Alexey Kuznetzov + - Rusty Russell + - Herbert Valerio Riedel + - Jeff Garzik + - Michael Richardson + - Andrew Morton + - Ingo Oeser + - Christoph Hellwig Portions of this API were derived from the following projects: - + Kerneli Cryptoapi (http://www.kerneli.org/) - Alexander Kjeldaas - Herbert Valerio Riedel - Kyle McMartin - Jean-Luc Cooke - David Bryson - Clemens Fruhwirth - Tobias Ringstrom - Harald Welte + - Alexander Kjeldaas + - Herbert Valerio Riedel + - Kyle McMartin + - Jean-Luc Cooke + - David Bryson + - Clemens Fruhwirth + - Tobias Ringstrom + - Harald Welte and; - + Nettle (http://www.lysator.liu.se/~nisse/nettle/) - Niels Möller + - Niels Möller Original developers of the crypto algorithms: - Dana L. How (DES) - Andrew Tridgell and Steve French (MD4) - Colin Plumb (MD5) - Steve Reid (SHA1) - Jean-Luc Cooke (SHA256, SHA384, SHA512) - Kazunori Miyazawa / USAGI (HMAC) - Matthew Skala (Twofish) - Dag Arne Osvik (Serpent) - Brian Gladman (AES) - Kartikey Mahendra Bhatt (CAST6) - Jon Oberheide (ARC4) - Jouni Malinen (Michael MIC) - NTT(Nippon Telegraph and Telephone Corporation) (Camellia) + - Dana L. How (DES) + - Andrew Tridgell and Steve French (MD4) + - Colin Plumb (MD5) + - Steve Reid (SHA1) + - Jean-Luc Cooke (SHA256, SHA384, SHA512) + - Kazunori Miyazawa / USAGI (HMAC) + - Matthew Skala (Twofish) + - Dag Arne Osvik (Serpent) + - Brian Gladman (AES) + - Kartikey Mahendra Bhatt (CAST6) + - Jon Oberheide (ARC4) + - Jouni Malinen (Michael MIC) + - NTT(Nippon Telegraph and Telephone Corporation) (Camellia) SHA1 algorithm contributors: - Jean-Francois Dive - + - Jean-Francois Dive + DES algorithm contributors: - Raimar Falke - Gisle Sælensminde - Niels Möller + - Raimar Falke + - Gisle Sælensminde + - Niels Möller Blowfish algorithm contributors: - Herbert Valerio Riedel - Kyle McMartin + - Herbert Valerio Riedel + - Kyle McMartin Twofish algorithm contributors: - Werner Koch - Marc Mutz + - Werner Koch + - Marc Mutz SHA256/384/512 algorithm contributors: - Andrew McDonald - Kyle McMartin - Herbert Valerio Riedel - + - Andrew McDonald + - Kyle McMartin + - Herbert Valerio Riedel + AES algorithm contributors: - Alexander Kjeldaas - Herbert Valerio Riedel - Kyle McMartin - Adam J. Richter - Fruhwirth Clemens (i586) - Linus Torvalds (i586) + - Alexander Kjeldaas + - Herbert Valerio Riedel + - Kyle McMartin + - Adam J. Richter + - Fruhwirth Clemens (i586) + - Linus Torvalds (i586) CAST5 algorithm contributors: - Kartikey Mahendra Bhatt (original developers unknown, FSF copyright). + - Kartikey Mahendra Bhatt (original developers unknown, FSF copyright). TEA/XTEA algorithm contributors: - Aaron Grothe - Michael Ringe + - Aaron Grothe + - Michael Ringe Khazad algorithm contributors: - Aaron Grothe + - Aaron Grothe Whirlpool algorithm contributors: - Aaron Grothe - Jean-Luc Cooke + - Aaron Grothe + - Jean-Luc Cooke Anubis algorithm contributors: - Aaron Grothe + - Aaron Grothe Tiger algorithm contributors: - Aaron Grothe + - Aaron Grothe VIA PadLock contributors: - Michal Ludvig + - Michal Ludvig Camellia algorithm contributors: - NTT(Nippon Telegraph and Telephone Corporation) (Camellia) + - NTT(Nippon Telegraph and Telephone Corporation) (Camellia) Generic scatterwalk code by Adam J. Richter Please send any credits updates or corrections to: Herbert Xu - diff --git a/Documentation/crypto/index.rst b/Documentation/crypto/index.rst index 2bcaf422731e..b2eeab3c8631 100644 --- a/Documentation/crypto/index.rst +++ b/Documentation/crypto/index.rst @@ -17,6 +17,7 @@ for cryptographic use cases, as well as programming examples. :maxdepth: 2 intro + api-intro architecture asymmetric-keys devel-algos