From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f48.google.com (mail-wr1-f48.google.com [209.85.221.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E38873BBFB6 for ; Mon, 6 Jul 2026 18:20:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783362016; cv=none; b=irHb/qY99/S2jhEfYNAm765tzPTyBpOq2hqNGcZ2WVmRclBZTeHS6IeeguDNFxgaJnPYfXRRwW76qGbn/lFz5TsrOXFkwVsQPu1ZKPjGEBamFmVn9HuQzctBI3fa01fz9FwiwZGEWVc1l8Kn+Od5vSx0T3iyFSfUuuw3l20nrN8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783362016; c=relaxed/simple; bh=+mBC3wHds5hkqQoAbrs/ckZqUqlq5DGBoM+aQ6GSbN0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ezifQc6zMekgqGrLbQ9QeSUDi4gqUXZWM5QOB/9srsnxfXFMKTWR6GdI+b0OLbPaleF67vKFcnUcMoEXpCJTbExjmrWP7JxY+Ce7jh2wN5TSL3ELLzAJvw/HHDL0D2PPuSPTyOe4qAqIQHhe53VBRTOdTUsU3MnNMR2YwadwZvA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Z9+QfX1d; arc=none smtp.client-ip=209.85.221.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Z9+QfX1d" Received: by mail-wr1-f48.google.com with SMTP id ffacd0b85a97d-47ddf7b09aaso992739f8f.3 for ; Mon, 06 Jul 2026 11:20:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1783362012; x=1783966812; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to; bh=/oh7qDp/45FgXXQqrTzgauJ39HP74+OOVGmB/m/72Sk=; b=Z9+QfX1dlYDzB47Apqo7xukv3o1dKc+n2QUUH54Q4/HyRrhZflF3i4gqRtCI/fRIka 2eTSNgrgBIqltmd4p7a2DRmQYTYZLe8v4NHBjC818dXbsg69ro8WifoQDV2V73BvQMyy 0f4Bxg1mHXXpuo6rqFVI92EbEdevPZuhkPPfsoUFIlbca5MWfxoKlIwA3+SewcUAyLHA nlibZ8TFCvWi8mK8YiOTByDG3i0ijTvqK+rhbO0+b3qWEfz3l9MyUoDd+5h9vwdh4+IZ 4XLpBsZ7CE1S5/wauVHk9U+8b2qKXs3jbI1c13GBDBqW+jEjb/pP8q1lvsQvV1XORUzL zLPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783362012; x=1783966812; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=/oh7qDp/45FgXXQqrTzgauJ39HP74+OOVGmB/m/72Sk=; b=m+ppXJMrr41SXCEZhAg8pK0Ah6qQV85blsmYlK3Y7IYQtqQf1ymDphD5SCULtI4mal RtRytO9OnIxfaqEhwUVcC5v5IZxN968L2GrDQ0H7FOlpV7SsobWf5xV42sAKd08XkN3y svDiw1FQpxkAqGy8lEucGLu6+BZ0eFYLpUnYbV4K9JOtjUGUObThix0gJxUXNx7c0pvd +firPnEHmebU4GNuPKFCot7cvrbMXpryf7bbzdmokSkxRy4IX/u7PeafxawS0LV8jMAI VtUcvXREpKIKd6+wz7JNDfBhW5n5a+ypALRKvPQfpdBUxyCtFs7NOPyTtf7Nhr/JImxk LoOA== X-Forwarded-Encrypted: i=1; AHgh+Rrx342Wtb9Wze8N6j3jpng8l1XZHAjtIvDof99bvpjrPC+DexXDUGv3khi6KiAd1SE6OhtzHEzcPFeqjb8=@vger.kernel.org X-Gm-Message-State: AOJu0Yyfkd/YAkEvkOgf6mEK+cl3TqVAkPiFheEvoGW1S22nc1WZ5Jjq 7ygkIu7T3Q0Uy/sq0qzz/fyezNXL/5xCjiCeqJmubng3cQLxPzRnqShs X-Gm-Gg: AfdE7clMTg42xVAvIUmYmxMpjxO12lgBCokpMA05zqZag63fXS5RhaUjZWtQ5Jnn9F+ yMwyHiaiWM/qRAQctUQKCh3ceLokyk5Y+iVySYH4yKsfUzHBRIkm/8hvzHnJVm+WSBpEWZlEMI4 URJerxXqD6L2LmbnpEwvib5uZdKvxvbrfwu2mPTrA5zC9pgIoIHtRilKwMmp6JwtwDp3RcQ1wXS XKerYUMNLg0+XykJT7NuvG9+sUXaYLQ9dmmITcLGqawr81s7pAlw9cafuetSUbtAWIEDmYMg5Rk wHQy0/2a+FcmqCdAkbBM3jy/1Okk81MWZJoH8/KeQHtThl1ed2ywMB5WAYs5lXEiAGIs1QshSl0 zy1BAadDdkwC1f8ZPACAVOYXi1lTkeVBbk7nWFkCsX5wa6bRGdhXeJRlVJ2fT6/RDzreXufeW62 SR5xKOVQAKyd4lQVS89INes/WTOPGWfQ1msOksng== X-Received: by 2002:a05:6000:461e:b0:454:a41f:d082 with SMTP id ffacd0b85a97d-47de66677fdmr1640454f8f.3.1783362012186; Mon, 06 Jul 2026 11:20:12 -0700 (PDT) Received: from [192.168.2.14] (85-70-151-113.rcd.o2.cz. [85.70.151.113]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47aa0f213e8sm23719930f8f.34.2026.07.06.11.20.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 06 Jul 2026 11:20:11 -0700 (PDT) Message-ID: <276a4c4e-bbe4-4f6f-9f9a-c1e195e06c86@gmail.com> Date: Mon, 6 Jul 2026 20:20:10 +0200 Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] crypto: af_alg - Allow additional ciphers for cryptsetup To: Eric Biggers , Herbert Xu , linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org References: <20260705184419.40762-1-ebiggers@kernel.org> Content-Language: en-US From: Milan Broz Autocrypt: addr=gmazyland@gmail.com; keydata= xsFNBE94p38BEADZRET8y1gVxlfDk44/XwBbFjC7eM6EanyCuivUPMmPwYDo9qRey0JdOGhW hAZeutGGxsKliozmeTL25Z6wWICu2oeY+ZfbgJQYHFeQ01NVwoYy57hhytZw/6IMLFRcIaWS Hd7oNdneQg6mVJcGdA/BOX68uo3RKSHj6Q8GoQ54F/NpCotzVcP1ORpVJ5ptyG0x6OZm5Esn 61pKE979wcHsz7EzcDYl+3MS63gZm+O3D1u80bUMmBUlxyEiC5jo5ksTFheA8m/5CAPQtxzY vgezYlLLS3nkxaq2ERK5DhvMv0NktXSutfWQsOI5WLjG7UWStwAnO2W+CVZLcnZV0K6OKDaF bCj4ovg5HV0FyQZknN2O5QbxesNlNWkMOJAnnX6c/zowO7jq8GCpa3oJl3xxmwFbCZtH4z3f EVw0wAFc2JlnufR4dhaax9fhNoUJ4OSVTi9zqstxhEyywkazakEvAYwOlC5+1FKoc9UIvApA GvgcTJGTOp7MuHptHGwWvGZEaJqcsqoy7rsYPxtDQ7bJuJJblzGIUxWAl8qsUsF8M4ISxBkf fcUYiR0wh1luUhXFo2rRTKT+Ic/nJDE66Ee4Ecn9+BPlNODhlEG1vk62rhiYSnyzy5MAUhUl stDxuEjYK+NGd2aYH0VANZalqlUZFTEdOdA6NYROxkYZVsVtXQARAQABzSBNaWxhbiBCcm96 IDxnbWF6eWxhbmRAZ21haWwuY29tPsLBlQQTAQgAPwIbAwYLCQgHAwIGFQgCCQoLBBYCAwEC HgECF4AWIQQqKRgkP95GZI0GhvnZsFd72T6Y/AUCYaUUZgUJJPhv5wAKCRDZsFd72T6Y/D5N D/438pkYd5NyycQ2Gu8YAjF57Od2GfeiftCDBOMXzh1XxIx7gLosLHvzCZ0SaRYPVF/Nr/X9 sreJVrMkwd1ILNdCQB1rLBhhKzwYFztmOYvdCG9LRrBVJPgtaYqO/0493CzXwQ7FfkEc4OVB uhBs4YwFu+kmhh0NngcP4jaaaIziHw/rQ9vLiAi28p1WeVTzOjtBt8QisTidS2VkZ+/iAgqB 9zz2UPkE1UXBAPU4iEsGCVXGWRz99IULsTNjP4K3p8ZpdZ6ovy7X6EN3lYhbpmXYLzZ3RXst PEojSvqpkSQsjUksR5VBE0GnaY4B8ZlM3Ng2o7vcxbToQOsOkbVGn+59rpBKgiRadRFuT+2D x80VrwWBccaph+VOfll9/4FVv+SBQ1wSPOUHl11TWVpdMFKtQgA5/HHldVqrcEssWJb9/tew 9pqxTDn6RHV/pfzKCspiiLVkI66BF802cpyboLBBSvcDuLHbOBHrpC+IXCZ7mgkCrgMlZMql wFWBjAu8Zlc5tQJPgE9eeQAQrfZRcLgux88PtxhVihA1OsMNoqYapgMzMTubLUMYCCsjrHZe nzw5uTcjig0RHz9ilMJlvVbhwVVLmmmf4p/R37QYaqm1RycLpvkUZUzSz2NCyTcZp9nM6ooR GhpDQWmUdH1Jz9T6E9//KIhI6xt4//P15ZfiIs7BTQRPeKd/ARAA3oR1fJ/D3GvnoInVqydD U9LGnMQaVSwQe+fjBy5/ILwo3pUZSVHdaKeVoa84gLO9g6JLToTo+ooMSBtsCkGHb//oiGTU 7KdLTLiFh6kmL6my11eiK53o1BI1CVwWMJ8jxbMBPet6exUubBzceBFbmqq3lVz4RZ2D1zKV njxB0/KjdbI53anIv7Ko1k+MwaKMTzO/O6vBmI71oGQkKO6WpcyzVjLIip9PEpDUYJRCrhKg hBeMPwe+AntP9Om4N/3AWF6icarGImnFvTYswR2Q+C6AoiAbqI4WmXOuzJLKiImwZrSYnSfQ 7qtdDGXWYr/N1+C+bgI8O6NuAg2cjFHE96xwJVhyaMzyROUZgm4qngaBvBvCQIhKzit61oBe I/drZ/d5JolzlKdZZrcmofmiCQRa+57OM3Fbl8ykFazN1ASyCex2UrftX5oHmhaeeRlGVaTV iEbAvU4PP4RnNKwaWQivsFhqQrfFFhvFV9CRSvsR6qu5eiFI6c8CjB49gBcKKAJ9a8gkyWs8 sg4PYY7L15XdRn8kOf/tg98UCM1vSBV2moEJA0f98/Z48LQXNb7dgvVRtH6owARspsV6nJyD vktsLTyMW5BW9q4NC1rgQC8GQXjrQ+iyQLNwy5ESe2MzGKkHogxKg4Pvi1wZh9Snr+RyB0Rq rIrzbXhyi47+7wcAEQEAAcLBfAQYAQgAJgIbDBYhBCopGCQ/3kZkjQaG+dmwV3vZPpj8BQJh pRSXBQkk+HAYAAoJENmwV3vZPpj8BPMP/iZV+XROOhs/MsKd7ngQeFgETkmt8YVhb2Rg3Vgp AQe9cn6aw9jk3CnB0ecNBdoyyt33t3vGNau6iCwlRfaTdXg9qtIyctuCQSewY2YMk5AS8Mmb XoGvjH1Z/irrVsoSz+N7HFPKIlAy8D/aRwS1CHm9saPQiGoeR/zThciVYncRG/U9J6sV8XH9 OEPnQQR4w/V1bYI9Sk+suGcSFN7pMRMsSslOma429A3bEbZ7Ikt9WTJnUY9XfL5ZqQnjLeRl 8243OTfuHSth26upjZIQ2esccZMYpQg0/MOlHvuFuFu6MFL/gZDNzH8jAcBrNd/6ABKsecYT nBInKH2TONc0kC65oAhrSSBNLudTuPHce/YBCsUCAEMwgJTybdpMQh9NkS68WxQtXxU6neoQ U7kEJGGFsc7/yXiQXuVvJUkK/Xs04X6j0l1f/6KLoNQ9ep/2In596B0BcvvaKv7gdDt1Trgg vlB+GpT+iFRLvhCBe5kAERREfRfmWJq1bHod/ulrp/VLGAaZlOBTgsCzufWF5SOLbZkmV2b5 xy2F/AU3oQUZncCvFMTWpBC+gO/o3kZCyyGCaQdQe4jS/FUJqR1suVwNMzcOJOP/LMQwujE/ Ch7XLM35VICo9qqhih4OvLHUAWzC5dNSipL+rSGHvWBdfXDhbezJIl6sp7/1rJfS8qPs In-Reply-To: <20260705184419.40762-1-ebiggers@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 7/5/26 8:44 PM, Eric Biggers wrote: > Add "xts(camellia)", "xts(serpent)", and "xts(twofish)" to the allowlist > for af_alg_restrict=1. These niche AES alternatives have continued to > see rare but persistent use via cryptsetup, which has historically > relied on the AF_ALG support for these ciphers in XTS mode for > performing the keyslot encryption. (cryptsetup v2.8.7 and later fall > back to a temporary dm-crypt mapping, but that requires root.) > > Signed-off-by: Eric Biggers > --- > crypto/algif_skcipher.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c > index 2b8069667974..49ae779b3b6b 100644 > --- a/crypto/algif_skcipher.c > +++ b/crypto/algif_skcipher.c > @@ -45,6 +45,9 @@ static const struct af_alg_allowlist_entry skcipher_allowlist[] = { > { "ecb(des)", true }, /* iwd */ > { "hctr2(aes)", false }, /* cryptsetup */ > { "xts(aes)", false }, /* cryptsetup benchmark */ > + { "xts(camellia)", false }, /* cryptsetup */ > + { "xts(serpent)", false }, /* cryptsetup */ > + { "xts(twofish)", false }, /* cryptsetup */ > {}, Well, if we are going this way, I would also add Aria and SM4 (currently usable only in cryptsetup main branch). Milan p.s. There is another user of AF_ALG hash, hardlink in util-linux, see https://github.com/util-linux/util-linux/blob/master/lib/fileeq.c