From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DF0F9CAC5A0 for ; Wed, 17 Sep 2025 23:23:45 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uz1TH-0005Uj-Rm; Wed, 17 Sep 2025 19:21:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uz1T6-0005Q3-6D; Wed, 17 Sep 2025 19:21:45 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uz1T3-0002Ma-JX; Wed, 17 Sep 2025 19:21:43 -0400 Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 58HH27Ed031341; Wed, 17 Sep 2025 23:21:39 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=TuwpGH+++Kf3sIZEb YhFUBUvwudQ8y2JmWpixuSXa6M=; b=ZK9bZcklGgnupbcyHHBm+aZTwEATMnQZw Y1mTWeYKpJLXhBd4PTqy7bsRrruKagmFbEq5uZCuG9KDg8L+g8Wh9DxzIktZ2ivf H21B7seexx5DS1706jnzEbtD63rLANI4j1q4MBgrsugTEP1R5V3pFm6+MaKwlFwT 0wzKCL5hPs7d4G1B+AyIakjrHhhVSnrZZGNsOg4LUo8Bo+m8hLz2UZD6dIz11klv tYp/SV9jm7WS/wShJctlIeHEdk53WEIU/T904/YlXpqSrA1fwIMpAxbHGwZH4nUR mS2ZMt2P4RxBthvBF+TNDCftJWVX8V4wWHf8dTrKXCCL1mZfUknIw== Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 497g4hpuuu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 17 Sep 2025 23:21:39 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 58HKVCxg005940; Wed, 17 Sep 2025 23:21:38 GMT Received: from smtprelay04.dal12v.mail.ibm.com ([172.16.1.6]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 495jxuc1m2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 17 Sep 2025 23:21:38 +0000 Received: from smtpav02.dal12v.mail.ibm.com (smtpav02.dal12v.mail.ibm.com [10.241.53.101]) by smtprelay04.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 58HNLbKZ27722378 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 Sep 2025 23:21:37 GMT Received: from smtpav02.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 213125805E; Wed, 17 Sep 2025 23:21:37 +0000 (GMT) Received: from smtpav02.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1A4205805A; Wed, 17 Sep 2025 23:21:36 +0000 (GMT) Received: from fedora-workstation.ibmuc.com (unknown [9.61.34.172]) by smtpav02.dal12v.mail.ibm.com (Postfix) with ESMTP; Wed, 17 Sep 2025 23:21:36 +0000 (GMT) From: Zhuoying Cai To: thuth@redhat.com, berrange@redhat.com, richard.henderson@linaro.org, david@redhat.com, jrossi@linux.ibm.com, qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: walling@linux.ibm.com, jjherne@linux.ibm.com, pasic@linux.ibm.com, borntraeger@linux.ibm.com, farman@linux.ibm.com, mjrosato@linux.ibm.com, iii@linux.ibm.com, eblake@redhat.com, armbru@redhat.com, zycai@linux.ibm.com, alifm@linux.ibm.com Subject: [PATCH v6 04/28] hw/s390x/ipl: Create certificate store Date: Wed, 17 Sep 2025 19:21:06 -0400 Message-ID: <20250917232131.495848-5-zycai@linux.ibm.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250917232131.495848-1-zycai@linux.ibm.com> References: <20250917232131.495848-1-zycai@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: KJvpdJmF5MVNMYwnwBDCybmr-6LNXay6 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTE2MDIwNCBTYWx0ZWRfXxHM4P2p8NmvH kisLsYK13RZ8WFYCB/XZdYfawRvXCEYikqS2kmsvrPDr1yYypm1YDrmZxIvUfo51LJ7+wsY69Ie rIIHJB09Q4fMnj7gi3dVDFCdkQknITWM/LxiGd8NQfW4HW6fG4OiaT5JSCPZQUdBk6vRrztHQbR kF/H+Lr4LrNBgm9dp9XpiBCxrpKAifr1q1NynZuYxQjdpl7F4Riregsp07t587Zp62bAsyqsr7N dP1+VaZ5j2Ea3VhZmXll1R5gdqZqkPpZdhobpMf2OD3qJdbe1YV0TSdvGAe0Nl3y8v4zZBcoYyg TfyuIKwArBkx/fNC6066Uu4YORDC/hldX088O0hsY1RjN8dZV9AlHtUyU8LRadjwuX0VhzyFApU MlBjfC/5 X-Proofpoint-GUID: KJvpdJmF5MVNMYwnwBDCybmr-6LNXay6 X-Authority-Analysis: v=2.4 cv=co2bk04i c=1 sm=1 tr=0 ts=68cb4283 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=yJojWOMRYYMA:10 a=VnNF1IyMAAAA:8 a=6ph8WD7lSjxTzuMCr3kA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-17_01,2025-09-17_02,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 priorityscore=1501 suspectscore=0 adultscore=0 phishscore=0 malwarescore=0 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509160204 Received-SPF: pass client-ip=148.163.156.1; envelope-from=zycai@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Create a certificate store for boot certificates used for secure IPL. Load certificates from the `boot-certs` parameter of s390-ccw-virtio machine type option into the cert store. Currently, only X.509 certificates in PEM format are supported, as the QEMU command line accepts certificates in PEM format only. Signed-off-by: Zhuoying Cai --- docs/specs/s390x-secure-ipl.rst | 15 +++ hw/s390x/cert-store.c | 213 ++++++++++++++++++++++++++++++++ hw/s390x/cert-store.h | 39 ++++++ hw/s390x/ipl.c | 19 +++ hw/s390x/ipl.h | 3 + hw/s390x/meson.build | 1 + include/hw/s390x/ipl/qipl.h | 2 + 7 files changed, 292 insertions(+) create mode 100644 docs/specs/s390x-secure-ipl.rst create mode 100644 hw/s390x/cert-store.c create mode 100644 hw/s390x/cert-store.h diff --git a/docs/specs/s390x-secure-ipl.rst b/docs/specs/s390x-secure-ipl.rst new file mode 100644 index 0000000000..9b1de5c604 --- /dev/null +++ b/docs/specs/s390x-secure-ipl.rst @@ -0,0 +1,15 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +s390 Certificate Store and Functions +==================================== + +s390 Certificate Store +---------------------- + +A certificate store is implemented for s390-ccw guests to retain within +memory all certificates provided by the user via the command-line, which +are expected to be stored somewhere on the host's file system. The store +will keep track of the number of certificates, their respective size, +and a summation of the sizes. + +Note: A maximum of 64 certificates are allowed to be stored in the certificate store. diff --git a/hw/s390x/cert-store.c b/hw/s390x/cert-store.c new file mode 100644 index 0000000000..318acfb1f6 --- /dev/null +++ b/hw/s390x/cert-store.c @@ -0,0 +1,213 @@ +/* + * S390 certificate store implementation + * + * Copyright 2025 IBM Corp. + * Author(s): Zhuoying Cai + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "cert-store.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "qemu/option.h" +#include "qemu/config-file.h" +#include "hw/s390x/ebcdic.h" +#include "hw/s390x/s390-virtio-ccw.h" +#include "qemu/cutils.h" +#include "crypto/x509-utils.h" +#include "qapi/qapi-types-machine-s390x.h" + +static BootCertificateList *s390_get_boot_certs(void) +{ + return S390_CCW_MACHINE(qdev_get_machine())->boot_certs; +} + +static size_t cert2buf(char *path, char **cert_buf) +{ + size_t size; + + if (!g_file_get_contents(path, cert_buf, &size, NULL)) { + return 0; + } + + return size; +} + +static S390IPLCertificate *init_cert_x509(size_t size, uint8_t *raw, Error **errp) +{ + S390IPLCertificate *cert = NULL; + g_autofree uint8_t *cert_der = NULL; + size_t der_len = size; + int rc; + + rc = qcrypto_x509_convert_cert_der(raw, size, &cert_der, &der_len, errp); + if (rc != 0) { + return NULL; + } + + cert = g_new0(S390IPLCertificate, 1); + cert->size = size; + cert->der_size = der_len; + /* store raw pointer - ownership transfers to cert */ + cert->raw = raw; + + return cert; +} + +static S390IPLCertificate *init_cert(char *path) +{ + char *buf; + size_t size; + char vc_name[VC_NAME_LEN_BYTES]; + g_autofree gchar *filename = NULL; + S390IPLCertificate *cert = NULL; + Error *local_err = NULL; + + filename = g_path_get_basename(path); + + size = cert2buf(path, &buf); + if (size == 0) { + error_report("Failed to load certificate: %s", path); + return NULL; + } + + cert = init_cert_x509(size, (uint8_t *)buf, &local_err); + if (cert == NULL) { + error_reportf_err(local_err, "Failed to initialize certificate: %s: ", path); + g_free(buf); + return NULL; + } + + /* + * Left justified certificate name with padding on the right with blanks. + * Convert certificate name to EBCDIC. + */ + strpadcpy(vc_name, VC_NAME_LEN_BYTES, filename, ' '); + ebcdic_put(cert->vc_name, vc_name, VC_NAME_LEN_BYTES); + + return cert; +} + +static void update_cert_store(S390IPLCertificateStore *cert_store, + S390IPLCertificate *cert) +{ + size_t data_buf_size; + size_t keyid_buf_size; + size_t hash_buf_size; + size_t cert_buf_size; + + /* length field is word aligned for later DIAG use */ + keyid_buf_size = ROUND_UP(CERT_KEY_ID_LEN, 4); + hash_buf_size = ROUND_UP(CERT_HASH_LEN, 4); + cert_buf_size = ROUND_UP(cert->der_size, 4); + data_buf_size = keyid_buf_size + hash_buf_size + cert_buf_size; + + if (cert_store->max_cert_size < data_buf_size) { + cert_store->max_cert_size = data_buf_size; + } + + cert_store->certs[cert_store->count] = *cert; + cert_store->total_bytes += data_buf_size; + cert_store->count++; +} + +static GPtrArray *get_cert_paths(void) +{ + BootCertificateList *path_list = NULL; + BootCertificateList *list = NULL; + gchar *cert_path; + GDir *dir = NULL; + const gchar *filename; + g_autoptr(GError) err = NULL; + g_autoptr(GPtrArray) cert_path_builder = g_ptr_array_new_full(0, g_free); + + path_list = s390_get_boot_certs(); + if (path_list == NULL) { + return g_steal_pointer(&cert_path_builder); + } + + for (list = path_list; list; list = list->next) { + cert_path = list->value->path; + + if (g_strcmp0(cert_path, "") == 0) { + error_report("Empty path in certificate path list is not allowed"); + goto fail; + } + + struct stat st; + if (stat(cert_path, &st) != 0) { + error_report("Failed to stat path '%s': %s", cert_path, g_strerror(errno)); + goto fail; + } + + if (S_ISREG(st.st_mode)) { + if (!g_str_has_suffix(cert_path, ".pem")) { + error_report("Certificate file '%s' must have a .pem extension", + cert_path); + goto fail; + } + + g_ptr_array_add(cert_path_builder, g_strdup(cert_path)); + } else if (S_ISDIR(st.st_mode)) { + dir = g_dir_open(cert_path, 0, &err); + if (dir == NULL) { + error_report("Failed to open directory '%s': %s", + cert_path, err->message); + goto fail; + } + + while ((filename = g_dir_read_name(dir))) { + if (g_str_has_suffix(filename, ".pem")) { + g_ptr_array_add(cert_path_builder, + g_build_filename(cert_path, filename, NULL)); + } + } + + g_dir_close(dir); + } else { + error_report("Path '%s' is neither a file nor a directory", cert_path); + goto fail; + } + } + + qapi_free_BootCertificateList(path_list); + return g_steal_pointer(&cert_path_builder); + +fail: + qapi_free_BootCertificateList(path_list); + exit(1); +} + +void s390_ipl_create_cert_store(S390IPLCertificateStore *cert_store) +{ + GPtrArray *cert_path_builder; + + cert_path_builder = get_cert_paths(); + if (cert_path_builder->len == 0) { + g_ptr_array_free(cert_path_builder, TRUE); + return; + } + + if (cert_path_builder->len > MAX_CERTIFICATES - 1) { + error_report("Cert store exceeds maximum of %d certificates", MAX_CERTIFICATES); + g_ptr_array_free(cert_path_builder, TRUE); + exit(1); + } + + cert_store->max_cert_size = 0; + cert_store->total_bytes = 0; + + for (int i = 0; i < cert_path_builder->len; i++) { + S390IPLCertificate *cert = init_cert((char *) cert_path_builder->pdata[i]); + if (!cert) { + g_ptr_array_free(cert_path_builder, TRUE); + exit(1); + } + + update_cert_store(cert_store, cert); + } + + g_ptr_array_free(cert_path_builder, TRUE); +} diff --git a/hw/s390x/cert-store.h b/hw/s390x/cert-store.h new file mode 100644 index 0000000000..3f76a00277 --- /dev/null +++ b/hw/s390x/cert-store.h @@ -0,0 +1,39 @@ +/* + * S390 certificate store + * + * Copyright 2025 IBM Corp. + * Author(s): Zhuoying Cai + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef HW_S390_CERT_STORE_H +#define HW_S390_CERT_STORE_H + +#include "hw/s390x/ipl/qipl.h" +#include "crypto/x509-utils.h" + +#define VC_NAME_LEN_BYTES 64 + +#define CERT_KEY_ID_LEN QCRYPTO_HASH_DIGEST_LEN_SHA256 +#define CERT_HASH_LEN QCRYPTO_HASH_DIGEST_LEN_SHA256 + +struct S390IPLCertificate { + uint8_t vc_name[VC_NAME_LEN_BYTES]; + size_t size; + size_t der_size; + uint8_t *raw; +}; +typedef struct S390IPLCertificate S390IPLCertificate; + +struct S390IPLCertificateStore { + uint16_t count; + size_t max_cert_size; + size_t total_bytes; + S390IPLCertificate certs[MAX_CERTIFICATES]; +} QEMU_PACKED; +typedef struct S390IPLCertificateStore S390IPLCertificateStore; + +void s390_ipl_create_cert_store(S390IPLCertificateStore *cert_store); + +#endif diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c index 2f082396c7..917166ba31 100644 --- a/hw/s390x/ipl.c +++ b/hw/s390x/ipl.c @@ -35,6 +35,7 @@ #include "qemu/option.h" #include "qemu/ctype.h" #include "standard-headers/linux/virtio_ids.h" +#include "cert-store.h" #define KERN_IMAGE_START 0x010000UL #define LINUX_MAGIC_ADDR 0x010008UL @@ -422,6 +423,20 @@ void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp) } } +S390IPLCertificateStore *s390_ipl_get_certificate_store(void) +{ + S390IPLState *ipl = get_ipl_device(); + + return &ipl->cert_store; +} + +static bool s390_has_certificate(void) +{ + S390IPLState *ipl = get_ipl_device(); + + return ipl->cert_store.count > 0; +} + static bool s390_build_iplb(DeviceState *dev_st, IplParameterBlock *iplb) { CcwDevice *ccw_dev = NULL; @@ -717,6 +732,10 @@ void s390_ipl_prepare_cpu(S390CPU *cpu) if (!ipl->kernel || ipl->iplb_valid) { cpu->env.psw.addr = ipl->bios_start_addr; + /* initialize cert store if it's empty */ + if (!s390_has_certificate()) { + s390_ipl_create_cert_store(&ipl->cert_store); + } if (!ipl->iplb_valid) { ipl->iplb_valid = s390_init_all_iplbs(ipl); } else { diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h index 8f83c7da29..bee72dfbb3 100644 --- a/hw/s390x/ipl.h +++ b/hw/s390x/ipl.h @@ -13,6 +13,7 @@ #ifndef HW_S390_IPL_H #define HW_S390_IPL_H +#include "cert-store.h" #include "cpu.h" #include "exec/target_page.h" #include "system/address-spaces.h" @@ -35,6 +36,7 @@ int s390_ipl_pv_unpack(struct S390PVResponse *pv_resp); void s390_ipl_prepare_cpu(S390CPU *cpu); IplParameterBlock *s390_ipl_get_iplb(void); IplParameterBlock *s390_ipl_get_iplb_pv(void); +S390IPLCertificateStore *s390_ipl_get_certificate_store(void); enum s390_reset { /* default is a reset not triggered by a CPU e.g. issued by QMP */ @@ -64,6 +66,7 @@ struct S390IPLState { IplParameterBlock iplb; IplParameterBlock iplb_pv; QemuIplParameters qipl; + S390IPLCertificateStore cert_store; uint64_t start_addr; uint64_t compat_start_addr; uint64_t bios_start_addr; diff --git a/hw/s390x/meson.build b/hw/s390x/meson.build index 8866012ddc..80d3d4a74d 100644 --- a/hw/s390x/meson.build +++ b/hw/s390x/meson.build @@ -17,6 +17,7 @@ s390x_ss.add(files( 'sclpcpu.c', 'sclpquiesce.c', 'tod.c', + 'cert-store.c', )) s390x_ss.add(when: 'CONFIG_KVM', if_true: files( 'tod-kvm.c', diff --git a/include/hw/s390x/ipl/qipl.h b/include/hw/s390x/ipl/qipl.h index 6824391111..e505f44020 100644 --- a/include/hw/s390x/ipl/qipl.h +++ b/include/hw/s390x/ipl/qipl.h @@ -20,6 +20,8 @@ #define LOADPARM_LEN 8 #define NO_LOADPARM "\0\0\0\0\0\0\0\0" +#define MAX_CERTIFICATES 64 + /* * The QEMU IPL Parameters will be stored at absolute address * 204 (0xcc) which means it is 32-bit word aligned but not -- 2.50.1