qemu

FORK: QEMU emulator
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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 
     29 static void
     30 qcrypto_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 
     68 static void
     69 qcrypto_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 
     80 static char *
     81 qcrypto_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 
     89 static void
     90 qcrypto_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 
    101 static char *
    102 qcrypto_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 
    110 static void
    111 qcrypto_secret_finalize(Object *obj)
    112 {
    113     QCryptoSecret *secret = QCRYPTO_SECRET(obj);
    114 
    115     g_free(secret->file);
    116     g_free(secret->data);
    117 }
    118 
    119 static void
    120 qcrypto_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 
    134 static 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 
    144 static void
    145 qcrypto_secret_register_types(void)
    146 {
    147     type_register_static(&qcrypto_secret_info);
    148 }
    149 
    150 
    151 type_init(qcrypto_secret_register_types);