From nobody Fri Oct 31 16:38:18 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=reject dis=none) header.from=citrix.com ARC-Seal: i=1; a=rsa-sha256; t=1748871438; cv=none; d=zohomail.com; s=zohoarc; b=jYbM7Xclsmj9ZcIXmilsumAN6QpsKV9LrRugvWqzPYi/nYbXIP+0S8p/MMLq+tzgmGaSRWpptLF05y+iT182R9X1E+daCz8RKsiY5DxUYyaUM4ps1zXCNuIha9EwifLY45PCWiuFM8qbWq5ud6pqpjp1lgi/5cclbzzmFE+6dGA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1748871438; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=D4baIbDrOsM/y9vBJw3lc1/l5s3LVRFoojQrWo8j6uc=; b=eUk+gQ/AOuLMzIZm62pzZlKzgM/FyecA257Swka8j7yZsZ9xrreDuoW4qpFeYljs/bL4gjVYdShtmyGciBo7XbzOXlR0tgBBs48/5hnt8xLhQPU1vonQFuaPGZ3q20MDIUxu3hsvL10bVuMrTThGlB4lg8rPI/KD2nIxxQkXAZY= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1748871437928610.8562847082563; Mon, 2 Jun 2025 06:37:17 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.1003322.1382864 (Exim 4.92) (envelope-from ) id 1uM5LV-0000dE-Jk; Mon, 02 Jun 2025 13:36:57 +0000 Received: by outflank-mailman (output) from mailman id 1003322.1382864; Mon, 02 Jun 2025 13:36:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1uM5LV-0000d5-Gz; Mon, 02 Jun 2025 13:36:57 +0000 Received: by outflank-mailman (input) for mailman id 1003322; Mon, 02 Jun 2025 13:36:56 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1uM5LU-0000AN-6C for xen-devel@lists.xenproject.org; Mon, 02 Jun 2025 13:36:56 +0000 Received: from mail-ej1-x632.google.com (mail-ej1-x632.google.com [2a00:1450:4864:20::632]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id a664d860-3fb6-11f0-a300-13f23c93f187; Mon, 02 Jun 2025 15:36:55 +0200 (CEST) Received: by mail-ej1-x632.google.com with SMTP id a640c23a62f3a-ad8a6c202ffso855479666b.3 for ; Mon, 02 Jun 2025 06:36:55 -0700 (PDT) Received: from rossla-pc.eng.citrite.net ([185.25.67.249]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ada5d82becbsm801962166b.39.2025.06.02.06.36.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Jun 2025 06:36:54 -0700 (PDT) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: a664d860-3fb6-11f0-a300-13f23c93f187 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.com; s=google; t=1748871415; x=1749476215; darn=lists.xenproject.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=D4baIbDrOsM/y9vBJw3lc1/l5s3LVRFoojQrWo8j6uc=; b=cLEY13ZWw57uHIDQFppYDQ79QwNpvQZbHtCr9SDi7hTkR/iKKWkzJQlfGQRtNfAhD5 ISvMhjmjz0fl4oNJqjTP85DoFaXH9yn20WkV2soZLh3VBdRDAziL7JjYAEmRjE787hku Qd3PjNakR9T3wzc/yFmEzRRid9cr/o1gF9bL4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748871415; x=1749476215; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=D4baIbDrOsM/y9vBJw3lc1/l5s3LVRFoojQrWo8j6uc=; b=en8C3jibS4cnCI/bXmqU1oSmCZvfZ5Ayl4Wy6DR+xYlXvErrp14OerG+0qOQH6Xlve eWPiFADutOVSjZPYfjpJCMi8YZBc6cauUZqJMYnXW0NelAlNbIuW7NIyfgJsACtXk+tb cZ7HqqH7eKfM4yrAIk5anmpRj1X+nQCQg6klXjeKpAziIC49QuW71UYWSqCQx71mx4G0 /ho+UpuKihQ9ki9rDpSM7Jns2PIZ+ngZpgXYpXIuQ+8ZdcYcDY7/qOV8XoZvKmJNVxx5 AsS/55tKO9SxyElHI51UbzqjEiflHK4+GI5J0S9M8Kv2kWO6Py0PqAJLOxl8J+60lfcW Cr6A== X-Gm-Message-State: AOJu0Yx1fsMPLu9I/Mxj236owerRfa6zXbgDJqgC14SjZKQ2KjIb1lRm zP2Gob65P4/0dujMpKxsPOoZEcpWHgnkAIsMlLhEt8qkCpQPaubTXKyyChZc87H28DdbyMleM4I 3NUc= X-Gm-Gg: ASbGncv07aszco3ek8cxSLOkOh08TArGnu91Z1w3Dt4W7WKPlNb/kkBggBICDRpNMp8 /WRo79tHf6U7kvZ+T4yoFwvACZNAxEajHtyeLOnxwuN7W05afzopL/Fw8/vyXgy1kTiA8+wui0S nbVt7I7s+OrCkBkNc82reLA+JxsEVXfRDeK+vxio7vUlURoXVYBs+Ex8isQ/ej33DvnUovLz3s/ Fm6zGdo6XaqW6FOjeZgsgLvawrChSjE3ADYg9DBq7SDrhxLeQICJ+a2I81CGqtR+TLL9kwVdh7D 3aBI/jnbZZNGGrB2WEn2CJRpxbekEqqAiwRLv/KnEIb8WwlFbtvug90G9xTPgKb+2biCtKqvkBG j3xTHGwozZA== X-Google-Smtp-Source: AGHT+IGyzrBL1oEx1GJqgPBxBT5OrZ6loM+nv7/VroTRyESh/NW9kHGjgB8y/GwOZNWzbhJ1PHSi4A== X-Received: by 2002:a17:907:9711:b0:ad8:9b16:58cc with SMTP id a640c23a62f3a-adb494e5aa2mr765152666b.39.1748871414513; Mon, 02 Jun 2025 06:36:54 -0700 (PDT) From: Ross Lagerwall To: xen-devel@lists.xenproject.org Cc: Ross Lagerwall , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [PATCH v3 4/5] livepatch: Load built-in key during boot Date: Mon, 2 Jun 2025 14:36:36 +0100 Message-ID: <20250602133639.2871212-5-ross.lagerwall@citrix.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250602133639.2871212-1-ross.lagerwall@citrix.com> References: <20250602133639.2871212-1-ross.lagerwall@citrix.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @citrix.com) X-ZM-MESSAGEID: 1748871439497116600 Content-Type: text/plain; charset="utf-8" Parse the raw data of the embedded RSA key into a form that can be later used for verifying live patch signatures. Signed-off-by: Ross Lagerwall --- * Fix endianness of builtin key lengths * Set builtin key to __ro_after_init xen/common/livepatch.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/xen/common/livepatch.c b/xen/common/livepatch.c index 9a0df5363b59..92d1d342d872 100644 --- a/xen/common/livepatch.c +++ b/xen/common/livepatch.c @@ -11,6 +11,8 @@ #include #include #include +#include +#include #include #include #include @@ -73,6 +75,10 @@ static struct livepatch_work livepatch_work; static DEFINE_PER_CPU(bool, work_to_do); static DEFINE_PER_CPU(struct tasklet, livepatch_tasklet); =20 +#ifdef CONFIG_PAYLOAD_VERIFY +static struct rsa_public_key __ro_after_init builtin_payload_key; +#endif + static int get_name(const struct xen_livepatch_name *name, char *n) { if ( !name->size || name->size > XEN_LIVEPATCH_NAME_SIZE ) @@ -2300,6 +2306,31 @@ static void cf_check livepatch_printall(unsigned cha= r key) spin_unlock(&payload_lock); } =20 +static int load_builtin_payload_key(void) +{ +#ifdef CONFIG_PAYLOAD_VERIFY + const uint8_t *ptr; + uint32_t len; + + rsa_public_key_init(&builtin_payload_key); + + ptr =3D xen_livepatch_key_data; + + memcpy(&len, ptr, sizeof(len)); + ptr +=3D sizeof(len); + builtin_payload_key.n =3D mpi_read_raw_data(ptr, le32_to_cpu(len)); + ptr +=3D len; + + memcpy(&len, ptr, sizeof(len)); + ptr +=3D sizeof(len); + builtin_payload_key.e =3D mpi_read_raw_data(ptr, le32_to_cpu(len)); + + return rsa_public_key_prepare(&builtin_payload_key); +#else + return 0; +#endif +} + static int cf_check cpu_callback( struct notifier_block *nfb, unsigned long action, void *hcpu) { @@ -2318,6 +2349,11 @@ static struct notifier_block cpu_nfb =3D { static int __init cf_check livepatch_init(void) { unsigned int cpu; + int err; + + err =3D load_builtin_payload_key(); + if ( err ) + return err; =20 for_each_online_cpu ( cpu ) { --=20 2.49.0