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Thu, 2 Apr 2026 22:15:12 +0000 (GMT) Received: from smtpav05.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 09DE658052; Thu, 2 Apr 2026 22:15:11 +0000 (GMT) Received: from fedora-workstation.ibmuc.com (unknown [9.61.183.185]) by smtpav05.dal12v.mail.ibm.com (Postfix) with ESMTP; Thu, 2 Apr 2026 22:15:10 +0000 (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=Fhv58ISPTiK07cD6K 6OR72kN2mYOGtdegx3Out2IwW8=; b=fS9Mxlgr5W01oPG5eR+sijbqWT/GXKxW4 p+3uTQQyaRubRKHnBp6BmqzV2c4FIK+sJFKtzo0ivVyp2AIKRRiG78d3TgY/vli9 0LgkWBmDmM7A7KoV5DxXu5HgCRSNRcCS2TTfo9AbbqzeQ8a95BbMeEyyCyVPsKVI MH9ccmpwd0wbk/YTuWyjNHpWUN3mgpvT0qoV3WyAyv55LwrugnK/VLW/A60nCLMy mhmJMZDdBZamx/N+iy0KnV0NzUWXMKxp4N9i8awYuu5lN+5hN4YxU9Cn78Y47vjj jh4ZWWobaV87K89/8geFCNhrthFv2D7mLqUH6eZjRgkdXkw94juIQ== From: Zhuoying Cai To: qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: jrossi@linux.ibm.com, cohuck@redhat.com, berrange@redhat.com, richard.henderson@linaro.org, pierrick.bouvier@linaro.org, david@kernel.org, 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, brueckner@linux.ibm.com, jdaley@linux.ibm.com Subject: [PATCH v10 04/30] hw/s390x/ipl: Create certificate store Date: Thu, 2 Apr 2026 18:14:26 -0400 Message-ID: <20260402221453.1602899-5-zycai@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260402221453.1602899-1-zycai@linux.ibm.com> References: <20260402221453.1602899-1-zycai@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=Fdo6BZ+6 c=1 sm=1 tr=0 ts=69ceea73 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=6ph8WD7lSjxTzuMCr3kA:9 X-Proofpoint-ORIG-GUID: d6h9_KBV5wEpmpUaqIbxxPWH3OvJ_tiz X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDAyMDE5NSBTYWx0ZWRfX3jprIxmRobKy 8u0kPR6wN7K1T+fm+PfdAEa/7c5TL9s/jD7/yneE0FSbCkJQXDrDsISyEsV7JAZNMZ4pJ9k/2au AvI7NjtLmOHtFySSXwCvj2S46B4p2qbu82AfYYGOWEOvDqsw4n8wYuqtW3BnD2sE0RRE6ezDPq2 /EKm4kWuP9v5gIIMddlwuoDZOL8RYhxWT0k7WyAJskZHJodQ3r+NqWD0S3l9JClwlYtrmkrYvpr RsuZ0UqkcFK/W/tLFpENhKz+5/MPITgpTKyW4i/bg50NghBWl4ajx8B4tDWAVvL0ZL6ysXx8aIX /nHQ+uEXo/+cTWQ/Z+sIjkvsY8wmeYf2sYoUyEx857GR4qgnkMLCDxYtPXwpog4WPKv9K/n62dx eoxCGaLhQNy2QajKjbvWZqc7FIgrd6RazGiuaNdNERmF6x9USYZcfMDQ6ugBxNta0gEomZ+HzLe 9eHYKlxCdT5itVSP5fg== X-Proofpoint-GUID: d6h9_KBV5wEpmpUaqIbxxPWH3OvJ_tiz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-02_04,2026-04-02_05,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 clxscore=1015 bulkscore=0 suspectscore=0 priorityscore=1501 adultscore=0 malwarescore=0 phishscore=0 spamscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604020195 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" 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 Reviewed-by: Farhan Ali --- docs/specs/index.rst | 1 + docs/specs/s390x-secure-ipl.rst | 16 +++ hw/s390x/cert-store.c | 221 ++++++++++++++++++++++++++++++++ hw/s390x/cert-store.h | 39 ++++++ hw/s390x/ipl.c | 10 ++ hw/s390x/ipl.h | 3 + hw/s390x/meson.build | 1 + include/hw/s390x/ipl/qipl.h | 2 + 8 files changed, 293 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/index.rst b/docs/specs/index.rst index b7909a108a..76d439782c 100644 --- a/docs/specs/index.rst +++ b/docs/specs/index.rst @@ -40,3 +40,4 @@ guest hardware that is specific to QEMU. riscv-aia aspeed-intc iommu-testdev + s390x-secure-ipl diff --git a/docs/specs/s390x-secure-ipl.rst b/docs/specs/s390x-secure-ipl.= rst new file mode 100644 index 0000000000..7ddac98a37 --- /dev/null +++ b/docs/specs/s390x-secure-ipl.rst @@ -0,0 +1,16 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +s390 Certificate Store and Functions +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +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 certifi= cate +store. diff --git a/hw/s390x/cert-store.c b/hw/s390x/cert-store.c new file mode 100644 index 0000000000..a4f15627e9 --- /dev/null +++ b/hw/s390x/cert-store.c @@ -0,0 +1,221 @@ +/* + * 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 BootCertificatesList *s390_get_boot_certs(void) +{ + return S390_CCW_MACHINE(qdev_get_machine())->boot_certs; +} + +static S390IPLCertificate *init_cert(char *path, Error **errp) +{ + int rc; + char *buf; + size_t size; + size_t der_len; + char name[CERT_NAME_MAX_LEN]; + g_autofree gchar *filename =3D NULL; + S390IPLCertificate *cert =3D NULL; + g_autofree uint8_t *cert_der =3D NULL; + Error *local_err =3D NULL; + + filename =3D g_path_get_basename(path); + + if (!g_file_get_contents(path, &buf, &size, NULL)) { + error_setg(errp, "Failed to load certificate: %s", path); + return NULL; + } + + rc =3D qcrypto_x509_convert_cert_der((uint8_t *)buf, size, + &cert_der, &der_len, &local_err); + if (rc !=3D 0) { + error_propagate_prepend(errp, local_err, + "Failed to initialize certificate: %s: ", = path); + g_free(buf); + return NULL; + } + + cert =3D g_new0(S390IPLCertificate, 1); + cert->size =3D size; + /* + * Store DER length only - reused for size calculation. + * cert_der is discarded because DER certificate data will be used once + * and can be regenerated from cert->raw. + */ + cert->der_size =3D der_len; + /* store raw pointer - ownership transfers to cert */ + cert->raw =3D (uint8_t *)buf; + + /* + * Left justified certificate name with padding on the right with blan= ks. + * Convert certificate name to EBCDIC. + */ + strpadcpy(name, CERT_NAME_MAX_LEN, filename, ' '); + ebcdic_put(cert->name, name, CERT_NAME_MAX_LEN); + + 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 =3D ROUND_UP(CERT_KEY_ID_LEN, 4); + hash_buf_size =3D ROUND_UP(CERT_HASH_LEN, 4); + cert_buf_size =3D ROUND_UP(cert->der_size, 4); + data_buf_size =3D keyid_buf_size + hash_buf_size + cert_buf_size; + + if (cert_store->largest_cert_size < data_buf_size) { + cert_store->largest_cert_size =3D data_buf_size; + } + + g_assert(cert_store->count < MAX_CERTIFICATES); + + cert_store->certs[cert_store->count] =3D *cert; + cert_store->total_bytes +=3D data_buf_size; + cert_store->count++; +} + +static GPtrArray *get_cert_paths(Error **errp) +{ + struct stat st; + BootCertificatesList *path_list =3D NULL; + BootCertificatesList *list =3D NULL; + gchar *cert_path; + GDir *dir =3D NULL; + const gchar *filename; + bool is_empty; + g_autoptr(GError) err =3D NULL; + g_autoptr(GPtrArray) cert_path_builder =3D g_ptr_array_new_full(0, g_f= ree); + + path_list =3D s390_get_boot_certs(); + + for (list =3D path_list; list; list =3D list->next) { + cert_path =3D list->value->path; + + if (g_strcmp0(cert_path, "") =3D=3D 0) { + error_setg(errp, "Empty path in certificate path list is not a= llowed"); + goto fail; + } + + if (stat(cert_path, &st) !=3D 0) { + error_setg(errp, "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_setg(errp, "Certificate file '%s' must have a .pem e= xtension", + cert_path); + goto fail; + } + + g_ptr_array_add(cert_path_builder, g_strdup(cert_path)); + } else if (S_ISDIR(st.st_mode)) { + dir =3D g_dir_open(cert_path, 0, &err); + if (dir =3D=3D NULL) { + error_setg(errp, "Failed to open directory '%s': %s", + cert_path, err->message); + + goto fail; + } + + is_empty =3D true; + while ((filename =3D g_dir_read_name(dir))) { + is_empty =3D false; + + if (g_str_has_suffix(filename, ".pem")) { + g_ptr_array_add(cert_path_builder, + g_build_filename(cert_path, filename, = NULL)); + } else { + warn_report("skipping '%s': not a .pem file", filename= ); + } + } + + if (is_empty) { + warn_report("'%s' directory is empty", cert_path); + } + + g_dir_close(dir); + } else { + error_setg(errp, "Path '%s' is neither a file nor a directory"= , cert_path); + goto fail; + } + } + + qapi_free_BootCertificatesList(path_list); + return g_steal_pointer(&cert_path_builder); + +fail: + qapi_free_BootCertificatesList(path_list); + return NULL; +} + +void s390_ipl_create_cert_store(S390IPLCertificateStore *cert_store) +{ + GPtrArray *cert_path_builder; + Error *err =3D NULL; + + /* If cert store is already populated, then no work to do */ + if (cert_store->count) { + return; + } + + cert_path_builder =3D get_cert_paths(&err); + if (cert_path_builder =3D=3D NULL) { + error_report_err(err); + exit(1); + } + + if (cert_path_builder->len =3D=3D 0) { + g_ptr_array_free(cert_path_builder, TRUE); + return; + } + + if (cert_path_builder->len > MAX_CERTIFICATES) { + error_report("Cert store exceeds maximum of %d certificates", MAX_= CERTIFICATES); + g_ptr_array_free(cert_path_builder, TRUE); + exit(1); + } + + cert_store->largest_cert_size =3D 0; + cert_store->total_bytes =3D 0; + + for (int i =3D 0; i < cert_path_builder->len; i++) { + g_autofree S390IPLCertificate *cert =3D + init_cert((char *) cert_path_builder->pdata[i], + &err); + if (!cert) { + error_report_err(err); + 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..7fc9503cb9 --- /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 CERT_NAME_MAX_LEN 64 + +#define CERT_KEY_ID_LEN QCRYPTO_HASH_DIGEST_LEN_SHA256 +#define CERT_HASH_LEN QCRYPTO_HASH_DIGEST_LEN_SHA256 + +struct S390IPLCertificate { + uint8_t name[CERT_NAME_MAX_LEN]; + size_t size; + size_t der_size; + uint8_t *raw; +}; +typedef struct S390IPLCertificate S390IPLCertificate; + +struct S390IPLCertificateStore { + uint16_t count; + size_t largest_cert_size; + size_t total_bytes; + S390IPLCertificate certs[MAX_CERTIFICATES]; +}; +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 1babcd2b7d..fbef46aee5 100644 --- a/hw/s390x/ipl.c +++ b/hw/s390x/ipl.c @@ -38,6 +38,7 @@ #include "qemu/option.h" #include "qemu/ctype.h" #include "standard-headers/linux/virtio_ids.h" +#include "cert-store.h" =20 #define KERN_IMAGE_START 0x010000UL #define LINUX_MAGIC_ADDR 0x010008UL @@ -453,6 +454,13 @@ void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t= *ebcdic_lp) } } =20 +S390IPLCertificateStore *s390_ipl_get_certificate_store(void) +{ + S390IPLState *ipl =3D get_ipl_device(); + + return &ipl->cert_store; +} + static bool s390_build_iplb(DeviceState *dev_st, IplParameterBlock *iplb) { CcwDevice *ccw_dev =3D NULL; @@ -771,6 +779,8 @@ void s390_ipl_prepare_cpu(S390CPU *cpu) cpu->env.psw.addr =3D ipl->start_addr; cpu->env.psw.mask =3D IPL_PSW_MASK; =20 + s390_ipl_create_cert_store(&ipl->cert_store); + if (!ipl->kernel || ipl->iplb_valid) { cpu->env.psw.addr =3D ipl->bios_start_addr; if (!ipl->iplb_valid) { diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h index 403cd08450..57f6a072a0 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 =20 +#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); =20 enum s390_reset { /* default is a reset not triggered by a CPU e.g. issued by QMP */ @@ -63,6 +65,7 @@ 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 57cc2a6be3..6b39ad012f 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 8d3c83a80b..ed1a91182a 100644 --- a/include/hw/s390x/ipl/qipl.h +++ b/include/hw/s390x/ipl/qipl.h @@ -31,6 +31,8 @@ typedef enum S390IplType S390IplType; =20 #define QEMU_DEFAULT_IPL S390_IPL_TYPE_CCW =20 +#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 --=20 2.53.0