cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

secret.c (4058B)

      1/*
      2 * QEMU crypto secret support
      3 *
      4 * Copyright (c) 2015 Red Hat, Inc.
      5 *
      6 * This library is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU Lesser General Public
      8 * License as published by the Free Software Foundation; either
      9 * version 2.1 of the License, or (at your option) any later version.
     10 *
     11 * This library is distributed in the hope that it will be useful,
     12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14 * Lesser General Public License for more details.
     15 *
     16 * You should have received a copy of the GNU Lesser General Public
     17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18 *
     19 */
     20
     21#include "qemu/osdep.h"
     22#include "crypto/secret.h"
     23#include "qapi/error.h"
     24#include "qom/object_interfaces.h"
     25#include "qemu/module.h"
     26#include "trace.h"
     27
     28
     29static void
     30qcrypto_secret_load_data(QCryptoSecretCommon *sec_common,
     31                         uint8_t **output,
     32                         size_t *outputlen,
     33                         Error **errp)
     34{
     35    char *data = NULL;
     36    size_t length = 0;
     37    GError *gerr = NULL;
     38
     39    QCryptoSecret *secret = QCRYPTO_SECRET(sec_common);
     40
     41    *output = NULL;
     42    *outputlen = 0;
     43
     44    if (secret->file) {
     45        if (secret->data) {
     46            error_setg(errp,
     47                       "'file' and 'data' are mutually exclusive");
     48            return;
     49        }
     50        if (!g_file_get_contents(secret->file, &data, &length, &gerr)) {
     51            error_setg(errp,
     52                       "Unable to read %s: %s",
     53                       secret->file, gerr->message);
     54            g_error_free(gerr);
     55            return;
     56        }
     57        *output = (uint8_t *)data;
     58        *outputlen = length;
     59    } else if (secret->data) {
     60        *outputlen = strlen(secret->data);
     61        *output = (uint8_t *)g_strdup(secret->data);
     62    } else {
     63        error_setg(errp, "Either 'file' or 'data' must be provided");
     64    }
     65}
     66
     67
     68static void
     69qcrypto_secret_prop_set_data(Object *obj,
     70                             const char *value,
     71                             Error **errp)
     72{
     73    QCryptoSecret *secret = QCRYPTO_SECRET(obj);
     74
     75    g_free(secret->data);
     76    secret->data = g_strdup(value);
     77}
     78
     79
     80static char *
     81qcrypto_secret_prop_get_data(Object *obj,
     82                             Error **errp)
     83{
     84    QCryptoSecret *secret = QCRYPTO_SECRET(obj);
     85    return g_strdup(secret->data);
     86}
     87
     88
     89static void
     90qcrypto_secret_prop_set_file(Object *obj,
     91                             const char *value,
     92                             Error **errp)
     93{
     94    QCryptoSecret *secret = QCRYPTO_SECRET(obj);
     95
     96    g_free(secret->file);
     97    secret->file = g_strdup(value);
     98}
     99
    100
    101static char *
    102qcrypto_secret_prop_get_file(Object *obj,
    103                             Error **errp)
    104{
    105    QCryptoSecret *secret = QCRYPTO_SECRET(obj);
    106    return g_strdup(secret->file);
    107}
    108
    109
    110static void
    111qcrypto_secret_finalize(Object *obj)
    112{
    113    QCryptoSecret *secret = QCRYPTO_SECRET(obj);
    114
    115    g_free(secret->file);
    116    g_free(secret->data);
    117}
    118
    119static void
    120qcrypto_secret_class_init(ObjectClass *oc, void *data)
    121{
    122    QCryptoSecretCommonClass *sic = QCRYPTO_SECRET_COMMON_CLASS(oc);
    123    sic->load_data = qcrypto_secret_load_data;
    124
    125    object_class_property_add_str(oc, "data",
    126                                  qcrypto_secret_prop_get_data,
    127                                  qcrypto_secret_prop_set_data);
    128    object_class_property_add_str(oc, "file",
    129                                  qcrypto_secret_prop_get_file,
    130                                  qcrypto_secret_prop_set_file);
    131}
    132
    133
    134static const TypeInfo qcrypto_secret_info = {
    135    .parent = TYPE_QCRYPTO_SECRET_COMMON,
    136    .name = TYPE_QCRYPTO_SECRET,
    137    .instance_size = sizeof(QCryptoSecret),
    138    .instance_finalize = qcrypto_secret_finalize,
    139    .class_size = sizeof(QCryptoSecretClass),
    140    .class_init = qcrypto_secret_class_init,
    141};
    142
    143
    144static void
    145qcrypto_secret_register_types(void)
    146{
    147    type_register_static(&qcrypto_secret_info);
    148}
    149
    150
    151type_init(qcrypto_secret_register_types);