From patchwork Wed Nov 30 20:23:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Joyce X-Patchwork-Id: 13060421 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E1C0C4708C for ; Wed, 30 Nov 2022 20:24:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229628AbiK3UYl (ORCPT ); Wed, 30 Nov 2022 15:24:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229748AbiK3UYW (ORCPT ); Wed, 30 Nov 2022 15:24:22 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93B3CF75; Wed, 30 Nov 2022 12:24:20 -0800 (PST) Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2AUJABSr011530; Wed, 30 Nov 2022 20:24:07 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=w1peTonDZuxenXexGE4C0Bx6s+Dx3567tMu20D0uLq4=; b=RDHU4y3DrNm3x86yFl1N9rajTabd8T9oTa4bgpidtb6l1WGLmGTSesTfBpPEycn79arD YkkXPB6iUhPxj7WcT/G3TER/j0X/LUX1+DP4+TgSr0omzq6Qt98wZj0H3ua1rdbiwvMu l+VFFibfjry11q0KvqeUrPP0Cbh3fFjpOqSRA2xlXkv+QY9xEKV1DpiUoWaS+Vnp2QQu YQ1B5zhCvivHQ6EarToTkcvcSPSk8hH15a72rGKSQiRYSv+UWm8/eQHAVGOeZsziZIW2 4+tTJeJ1jJ/UoymGuKLFPPtQpzW+nPBCIJOtBs9cQCMOfSQxFkw/FjtU6/rDjq8xm14A Uw== Received: from ppma01dal.us.ibm.com (83.d6.3fa9.ip4.static.sl-reverse.com [169.63.214.131]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3m6bednhy6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Nov 2022 20:24:06 +0000 Received: from pps.filterd (ppma01dal.us.ibm.com [127.0.0.1]) by ppma01dal.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 2AUKLWDt009268; Wed, 30 Nov 2022 20:24:05 GMT Received: from smtprelay02.wdc07v.mail.ibm.com ([9.208.129.120]) by ppma01dal.us.ibm.com with ESMTP id 3m3aeae0y3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Nov 2022 20:24:05 +0000 Received: from smtpav01.dal12v.mail.ibm.com (smtpav01.dal12v.mail.ibm.com [10.241.53.100]) by smtprelay02.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 2AUKO4gu38142252 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 30 Nov 2022 20:24:04 GMT Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2804058059; Wed, 30 Nov 2022 20:24:04 +0000 (GMT) Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 12D0158058; Wed, 30 Nov 2022 20:24:03 +0000 (GMT) Received: from rhel-laptop.ibm.com.com (unknown [9.160.99.100]) by smtpav01.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 30 Nov 2022 20:24:02 +0000 (GMT) From: gjoyce@linux.vnet.ibm.com To: linux-block@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org, jonathan.derrick@linux.dev, brking@linux.vnet.ibm.com, msuchanek@suse.de, mpe@ellerman.id.au, nayna@linux.ibm.com, axboe@kernel.dk, akpm@linux-foundation.org, gjoyce@linux.vnet.ibm.com, keyrings@vger.kernel.org Subject: [PATCH v5 2/3] powerpc/pseries: PLPKS SED Opal keystore support Date: Wed, 30 Nov 2022 14:23:57 -0600 Message-Id: <20221130202358.18034-3-gjoyce@linux.vnet.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221130202358.18034-1-gjoyce@linux.vnet.ibm.com> References: <20221130202358.18034-1-gjoyce@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: WQVGc5sBIZT3cez3D_f-UwHPMq8aeway X-Proofpoint-GUID: WQVGc5sBIZT3cez3D_f-UwHPMq8aeway X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-30_04,2022-11-30_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1015 mlxlogscore=999 mlxscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 adultscore=0 suspectscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211300141 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Greg Joyce Define operations for SED Opal to read/write keys from POWER LPAR Platform KeyStore(PLPKS). This allows for non-volatile storage of SED Opal keys. Signed-off-by: Greg Joyce Reviewed-by: Jonathan Derrick --- arch/powerpc/platforms/pseries/Makefile | 1 + .../powerpc/platforms/pseries/plpks_sed_ops.c | 129 ++++++++++++++++++ 2 files changed, 130 insertions(+) create mode 100644 arch/powerpc/platforms/pseries/plpks_sed_ops.c diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 92310202bdd7..5bedc06ee2cc 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_PPC_SPLPAR) += vphn.o obj-$(CONFIG_PPC_SVM) += svm.o obj-$(CONFIG_FA_DUMP) += rtas-fadump.o obj-$(CONFIG_PSERIES_PLPKS) += plpks.o +obj-$(CONFIG_PSERIES_PLPKS) += plpks_sed_ops.o obj-$(CONFIG_SUSPEND) += suspend.o obj-$(CONFIG_PPC_VAS) += vas.o vas-sysfs.o diff --git a/arch/powerpc/platforms/pseries/plpks_sed_ops.c b/arch/powerpc/platforms/pseries/plpks_sed_ops.c new file mode 100644 index 000000000000..cd1084d07716 --- /dev/null +++ b/arch/powerpc/platforms/pseries/plpks_sed_ops.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * POWER Platform specific code for non-volatile SED key access + * Copyright (C) 2022 IBM Corporation + * + * Define operations for SED Opal to read/write keys + * from POWER LPAR Platform KeyStore(PLPKS). + * + * Self Encrypting Drives(SED) key storage using PLPKS + */ + +#include +#include +#include +#include +#include +#include "plpks.h" + +/* + * structure that contains all SED data + */ +struct plpks_sed_object_data { + u_char version; + u_char pad1[7]; + u_long authority; + u_long range; + u_int key_len; + u_char key[32]; +}; + +#define PLPKS_PLATVAR_POLICY WORLDREADABLE +#define PLPKS_PLATVAR_OS_COMMON 4 + +#define PLPKS_SED_OBJECT_DATA_V0 0 +#define PLPKS_SED_MANGLED_LABEL "/default/pri" +#define PLPKS_SED_COMPONENT "sed-opal" +#define PLPKS_SED_KEY "opal-boot-pin" + +/* + * authority is admin1 and range is global + */ +#define PLPKS_SED_AUTHORITY 0x0000000900010001 +#define PLPKS_SED_RANGE 0x0000080200000001 + +void plpks_init_var(struct plpks_var *var, char *keyname) +{ + var->name = keyname; + var->namelen = strlen(keyname); + if (strcmp(PLPKS_SED_KEY, keyname) == 0) { + var->name = PLPKS_SED_MANGLED_LABEL; + var->namelen = strlen(keyname); + } + var->policy = PLPKS_PLATVAR_POLICY; + var->os = PLPKS_PLATVAR_OS_COMMON; + var->data = NULL; + var->datalen = 0; + var->component = PLPKS_SED_COMPONENT; +} + +/* + * Read the SED Opal key from PLPKS given the label + */ +int sed_read_key(char *keyname, char *key, u_int *keylen) +{ + struct plpks_var var; + struct plpks_sed_object_data *data; + u_int offset; + int ret; + u_int len; + + plpks_init_var(&var, keyname); + + ret = plpks_read_os_var(&var); + if (ret != 0) + return ret; + + offset = offsetof(struct plpks_sed_object_data, key); + if (offset > var.datalen) { + kfree(var.data); + return -EINVAL; + } + + data = (struct plpks_sed_object_data *)var.data; + len = min(be32_to_cpu(data->key_len), *keylen); + + if (var.data) { + memcpy(key, data->key, len); + kfree(var.data); + } else + len = 0; + + key[len] = '\0'; + *keylen = len; + + return 0; +} + +/* + * Write the SED Opal key to PLPKS given the label + */ +int sed_write_key(char *keyname, char *key, u_int keylen) +{ + struct plpks_var var; + struct plpks_sed_object_data data; + struct plpks_var_name vname; + + plpks_init_var(&var, keyname); + + var.datalen = sizeof(struct plpks_sed_object_data); + var.data = (u8 *)&data; + + /* initialize SED object */ + data.version = PLPKS_SED_OBJECT_DATA_V0; + data.authority = cpu_to_be64(PLPKS_SED_AUTHORITY); + data.range = cpu_to_be64(PLPKS_SED_RANGE); + memset(&data.pad1, '\0', sizeof(data.pad1)); + data.key_len = cpu_to_be32(keylen); + memcpy(data.key, (char *)key, keylen); + + /* + * Key update requires remove first. The return value + * is ignored since it's okay if the key doesn't exist. + */ + vname.namelen = var.namelen; + vname.name = var.name; + plpks_remove_var(var.component, var.os, vname); + + return plpks_write_var(var); +}