c734cd40a1
The requirement to specify the parent class type makes the macro harder to use and easy to misuse (silent bugs can be introduced if the wrong struct type is specified). Simplify the macro by just not declaring any class struct, allowing us to remove the class_size field from the TypeInfo variables for those types. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200916182519.415636-3-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
148 lines
3.9 KiB
C
148 lines
3.9 KiB
C
/*
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* QEMU crypto secret support
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*
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* Copyright 2020 Yandex N.V.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qemu/osdep.h"
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#include <asm/unistd.h>
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#include <linux/keyctl.h>
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#include "qapi/error.h"
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#include "qom/object_interfaces.h"
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#include "trace.h"
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#include "crypto/secret_keyring.h"
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static inline
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long keyctl_read(int32_t key, uint8_t *buffer, size_t buflen)
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{
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return syscall(__NR_keyctl, KEYCTL_READ, key, buffer, buflen, 0);
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}
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static void
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qcrypto_secret_keyring_load_data(QCryptoSecretCommon *sec_common,
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uint8_t **output,
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size_t *outputlen,
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Error **errp)
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{
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QCryptoSecretKeyring *secret = QCRYPTO_SECRET_KEYRING(sec_common);
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uint8_t *buffer = NULL;
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long retcode;
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*output = NULL;
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*outputlen = 0;
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if (!secret->serial) {
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error_setg(errp, "'serial' parameter must be provided");
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return;
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}
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retcode = keyctl_read(secret->serial, NULL, 0);
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if (retcode <= 0) {
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goto keyctl_error;
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}
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buffer = g_new0(uint8_t, retcode);
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retcode = keyctl_read(secret->serial, buffer, retcode);
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if (retcode < 0) {
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g_free(buffer);
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goto keyctl_error;
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}
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*outputlen = retcode;
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*output = buffer;
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return;
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keyctl_error:
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error_setg_errno(errp, errno,
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"Unable to read serial key %08x",
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secret->serial);
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}
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static void
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qcrypto_secret_prop_set_key(Object *obj, Visitor *v,
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const char *name, void *opaque,
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Error **errp)
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{
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QCryptoSecretKeyring *secret = QCRYPTO_SECRET_KEYRING(obj);
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int32_t value;
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visit_type_int32(v, name, &value, errp);
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if (!value) {
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error_setg(errp, "'serial' should not be equal to 0");
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}
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secret->serial = value;
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}
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static void
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qcrypto_secret_prop_get_key(Object *obj, Visitor *v,
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const char *name, void *opaque,
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Error **errp)
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{
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QCryptoSecretKeyring *secret = QCRYPTO_SECRET_KEYRING(obj);
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int32_t value = secret->serial;
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visit_type_int32(v, name, &value, errp);
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}
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static void
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qcrypto_secret_keyring_complete(UserCreatable *uc, Error **errp)
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{
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object_property_set_bool(OBJECT(uc), "loaded", true, errp);
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}
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static void
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qcrypto_secret_keyring_class_init(ObjectClass *oc, void *data)
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{
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QCryptoSecretCommonClass *sic = QCRYPTO_SECRET_COMMON_CLASS(oc);
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sic->load_data = qcrypto_secret_keyring_load_data;
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UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
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ucc->complete = qcrypto_secret_keyring_complete;
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object_class_property_add(oc, "serial", "int32_t",
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qcrypto_secret_prop_get_key,
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qcrypto_secret_prop_set_key,
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NULL, NULL);
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}
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static const TypeInfo qcrypto_secret_info = {
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.parent = TYPE_QCRYPTO_SECRET_COMMON,
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.name = TYPE_QCRYPTO_SECRET_KEYRING,
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.instance_size = sizeof(QCryptoSecretKeyring),
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.class_init = qcrypto_secret_keyring_class_init,
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_USER_CREATABLE },
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{ }
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}
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};
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static void
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qcrypto_secret_register_types(void)
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{
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type_register_static(&qcrypto_secret_info);
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}
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type_init(qcrypto_secret_register_types);
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