From patchwork Thu Jul 8 00:55:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Isaku Yamahata X-Patchwork-Id: 12364295 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 795F2C11F6B for ; Thu, 8 Jul 2021 00:56:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6502961977 for ; Thu, 8 Jul 2021 00:56:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231187AbhGHA7G (ORCPT ); Wed, 7 Jul 2021 20:59:06 -0400 Received: from mga03.intel.com ([134.134.136.65]:19087 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230240AbhGHA6j (ORCPT ); Wed, 7 Jul 2021 20:58:39 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10038"; a="209462010" X-IronPort-AV: E=Sophos;i="5.84,222,1620716400"; d="scan'208";a="209462010" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jul 2021 17:55:58 -0700 X-IronPort-AV: E=Sophos;i="5.84,222,1620716400"; d="scan'208";a="423770085" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jul 2021 17:55:57 -0700 From: isaku.yamahata@gmail.com To: qemu-devel@nongnu.org, pbonzini@redhat.com, alistair@alistair23.me, ehabkost@redhat.com, marcel.apfelbaum@gmail.com, mst@redhat.com, cohuck@redhat.com, mtosatti@redhat.com, xiaoyao.li@intel.com, seanjc@google.com, erdemaktas@google.com Cc: kvm@vger.kernel.org, isaku.yamahata@gmail.com, isaku.yamahata@intel.com Subject: [RFC PATCH v2 30/44] qom: implement property helper for sha384 Date: Wed, 7 Jul 2021 17:55:00 -0700 Message-Id: <398d321c9c74c43bf0fa137c04932b1b7a89efab.1625704981.git.isaku.yamahata@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Isaku Yamahata Implement property_add_sha384() which converts hex string <-> uint8_t[48] It will be used for TDX which uses sha384 for measurement. Signed-off-by: Isaku Yamahata --- include/qom/object.h | 17 ++++++++++ qom/object.c | 76 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 93 insertions(+) diff --git a/include/qom/object.h b/include/qom/object.h index 6721cd312e..594d0ec52c 100644 --- a/include/qom/object.h +++ b/include/qom/object.h @@ -1853,6 +1853,23 @@ ObjectProperty *object_property_add_alias(Object *obj, const char *name, ObjectProperty *object_property_add_const_link(Object *obj, const char *name, Object *target); + +/** + * object_property_add_sha384: + * @obj: the object to add a property to + * @name: the name of the property + * @v: pointer to value + * @flags: bitwise-or'd ObjectPropertyFlags + * + * Add an sha384 property in memory. This function will add a + * property of type 'sha384'. + * + * Returns: The newly added property on success, or %NULL on failure. + */ +ObjectProperty * object_property_add_sha384(Object *obj, const char *name, + const uint8_t *v, + ObjectPropertyFlags flags); + /** * object_property_set_description: * @obj: the object owning the property diff --git a/qom/object.c b/qom/object.c index 6a01d56546..e33a0b8c5d 100644 --- a/qom/object.c +++ b/qom/object.c @@ -15,6 +15,7 @@ #include "qapi/error.h" #include "qom/object.h" #include "qom/object_interfaces.h" +#include "qemu/ctype.h" #include "qemu/cutils.h" #include "qapi/visitor.h" #include "qapi/string-input-visitor.h" @@ -2749,6 +2750,81 @@ object_property_add_alias(Object *obj, const char *name, return op; } +#define SHA384_DIGEST_SIZE 48 +static void property_get_sha384(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + uint8_t *value = (uint8_t *)opaque; + char str[SHA384_DIGEST_SIZE * 2 + 1]; + char *str_ = (char*)str; + size_t i; + + for (i = 0; i < SHA384_DIGEST_SIZE; i++) { + char *buf; + buf = &str[i * 2]; + + sprintf(buf, "%02hhx", value[i]); + } + str[SHA384_DIGEST_SIZE * 2] = '\0'; + + visit_type_str(v, name, &str_, errp); +} + +static void property_set_sha384(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + uint8_t *value = (uint8_t *)opaque; + char* str; + size_t len; + size_t i; + + if (!visit_type_str(v, name, &str, errp)) { + goto err; + } + + len = strlen(str); + if (len != SHA384_DIGEST_SIZE * 2) { + error_setg(errp, "invalid length for sha348 hex string %s. " + "it must be 48 * 2 hex", name); + goto err; + } + + for (i = 0; i < SHA384_DIGEST_SIZE; i++) { + if (!qemu_isxdigit(str[i * 2]) || !qemu_isxdigit(str[i * 2 + 1])) { + error_setg(errp, "invalid char for sha318 hex string %s at %c%c", + name, str[i * 2], str[i * 2 + 1]); + goto err; + } + + if (sscanf(str + i * 2, "%02hhx", &value[i]) != 1) { + error_setg(errp, "invalid format for sha318 hex string %s", name); + goto err; + } + } + +err: + g_free(str); +} + +ObjectProperty * +object_property_add_sha384(Object *obj, const char *name, + const uint8_t *v, ObjectPropertyFlags flags) +{ + ObjectPropertyAccessor *getter = NULL; + ObjectPropertyAccessor *setter = NULL; + + if ((flags & OBJ_PROP_FLAG_READ) == OBJ_PROP_FLAG_READ) { + getter = property_get_sha384; + } + + if ((flags & OBJ_PROP_FLAG_WRITE) == OBJ_PROP_FLAG_WRITE) { + setter = property_set_sha384; + } + + return object_property_add(obj, name, "sha384", + getter, setter, NULL, (void *)v); +} + void object_property_set_description(Object *obj, const char *name, const char *description) {