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libvirt/tools/virsh-secret.c
Kristina Hanicova ec5561c0bb virsh: add support for '--validate' option in define secret 
Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
2021-08-20 15:41:22 +02:00

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/*
* virsh-secret.c: Commands to manage secret
*
* Copyright (C) 2005, 2007-2016 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "virsh-secret.h"
#include "virsh-util.h"
#include "internal.h"
#include "virbuffer.h"
#include "viralloc.h"
#include "virfile.h"
#include "virutil.h"
#include "virsecret.h"
#include "virtime.h"
#include "vsh-table.h"
#include "virenum.h"
#include "virsecureerase.h"
static virSecretPtr
virshCommandOptSecret(vshControl *ctl, const vshCmd *cmd, const char **name)
{
virSecretPtr secret = NULL;
const char *n = NULL;
const char *optname = "secret";
virshControl *priv = ctl->privData;
if (vshCommandOptStringReq(ctl, cmd, optname, &n) < 0)
return NULL;
vshDebug(ctl, VSH_ERR_DEBUG,
"%s: found option <%s>: %s\n", cmd->def->name, optname, n);
if (name != NULL)
*name = n;
secret = virSecretLookupByUUIDString(priv->conn, n);
if (secret == NULL)
vshError(ctl, _("failed to get secret '%s'"), n);
return secret;
}
/*
* "secret-define" command
*/
static const vshCmdInfo info_secret_define[] = {
{.name = "help",
.data = N_("define or modify a secret from an XML file")
},
{.name = "desc",
.data = N_("Define or modify a secret.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_secret_define[] = {
VIRSH_COMMON_OPT_FILE(N_("file containing secret attributes in XML")),
{.name = "validate",
.type = VSH_OT_BOOL,
.help = N_("validate the XML against the schema")
},
{.name = NULL}
};
static bool
cmdSecretDefine(vshControl *ctl, const vshCmd *cmd)
{
const char *from = NULL;
g_autofree char *buffer = NULL;
virSecretPtr res;
char uuid[VIR_UUID_STRING_BUFLEN];
bool ret = false;
unsigned int flags = 0;
virshControl *priv = ctl->privData;
if (vshCommandOptStringReq(ctl, cmd, "file", &from) < 0)
return false;
if (vshCommandOptBool(cmd, "validate"))
flags |= VIR_SECRET_DEFINE_VALIDATE;
if (virFileReadAll(from, VSH_MAX_XML_FILE, &buffer) < 0)
return false;
if (!(res = virSecretDefineXML(priv->conn, buffer, flags))) {
vshError(ctl, _("Failed to set attributes from %s"), from);
goto cleanup;
}
if (virSecretGetUUIDString(res, &(uuid[0])) < 0) {
vshError(ctl, "%s", _("Failed to get UUID of created secret"));
goto cleanup;
}
vshPrintExtra(ctl, _("Secret %s created\n"), uuid);
ret = true;
cleanup:
virshSecretFree(res);
return ret;
}
/*
* "secret-dumpxml" command
*/
static const vshCmdInfo info_secret_dumpxml[] = {
{.name = "help",
.data = N_("secret attributes in XML")
},
{.name = "desc",
.data = N_("Output attributes of a secret as an XML dump to stdout.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_secret_dumpxml[] = {
{.name = "secret",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("secret UUID"),
.completer = virshSecretUUIDCompleter,
},
{.name = NULL}
};
static bool
cmdSecretDumpXML(vshControl *ctl, const vshCmd *cmd)
{
virSecretPtr secret;
bool ret = false;
g_autofree char *xml = NULL;
secret = virshCommandOptSecret(ctl, cmd, NULL);
if (secret == NULL)
return false;
xml = virSecretGetXMLDesc(secret, 0);
if (xml == NULL)
goto cleanup;
vshPrint(ctl, "%s", xml);
ret = true;
cleanup:
virshSecretFree(secret);
return ret;
}
/*
* "secret-set-value" command
*/
static const vshCmdInfo info_secret_set_value[] = {
{.name = "help",
.data = N_("set a secret value")
},
{.name = "desc",
.data = N_("Set a secret value.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_secret_set_value[] = {
{.name = "secret",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("secret UUID"),
.completer = virshSecretUUIDCompleter,
},
{.name = "file",
.type = VSH_OT_STRING,
.flags = VSH_OFLAG_REQ_OPT,
.help = N_("read secret from file"),
},
{.name = "plain",
.type = VSH_OT_BOOL,
.help = N_("read the secret from file without converting from base64")
},
{.name = "interactive",
.type = VSH_OT_BOOL,
.help = N_("read the secret from the terminal")
},
{.name = "base64",
.type = VSH_OT_STRING,
.help = N_("base64-encoded secret value")
},
{.name = NULL}
};
static bool
cmdSecretSetValue(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshSecret) secret = NULL;
const char *base64 = NULL;
const char *filename = NULL;
g_autofree char *secret_val = NULL;
size_t secret_len = 0;
bool plain = vshCommandOptBool(cmd, "plain");
bool interactive = vshCommandOptBool(cmd, "interactive");
int res;
VSH_EXCLUSIVE_OPTIONS("file", "base64");
VSH_EXCLUSIVE_OPTIONS("plain", "base64");
VSH_EXCLUSIVE_OPTIONS("interactive", "base64");
VSH_EXCLUSIVE_OPTIONS("interactive", "plain");
VSH_EXCLUSIVE_OPTIONS("interactive", "file");
if (!(secret = virshCommandOptSecret(ctl, cmd, NULL)))
return false;
if (vshCommandOptStringReq(ctl, cmd, "base64", &base64) < 0)
return false;
if (vshCommandOptStringReq(ctl, cmd, "file", &filename) < 0)
return false;
if (base64) {
/* warn users that the --base64 option passed from command line is wrong */
vshError(ctl, _("Passing secret value as command-line argument is insecure!"));
secret_val = g_strdup(base64);
secret_len = strlen(secret_val);
} else if (filename) {
ssize_t read_ret;
if ((read_ret = virFileReadAll(filename, 1024, &secret_val)) < 0) {
vshSaveLibvirtError();
return false;
}
secret_len = read_ret;
} else if (interactive) {
vshPrint(ctl, "%s", _("Enter new value for secret:"));
fflush(stdout);
if (!(secret_val = virGetPassword())) {
vshError(ctl, "%s", _("Failed to read secret"));
return false;
}
secret_len = strlen(secret_val);
plain = true;
} else {
vshError(ctl, _("Input secret value is missing"));
return false;
}
if (!plain) {
g_autofree char *tmp = g_steal_pointer(&secret_val);
size_t tmp_len = secret_len;
secret_val = (char *) g_base64_decode(tmp, &secret_len);
virSecureErase(tmp, tmp_len);
}
res = virSecretSetValue(secret, (unsigned char *) secret_val, secret_len, 0);
virSecureErase(secret_val, secret_len);
if (res != 0) {
vshError(ctl, "%s", _("Failed to set secret value"));
return false;
}
vshPrintExtra(ctl, "%s", _("Secret value set\n"));
return true;
}
/*
* "secret-get-value" command
*/
static const vshCmdInfo info_secret_get_value[] = {
{.name = "help",
.data = N_("Output a secret value")
},
{.name = "desc",
.data = N_("Output a secret value to stdout.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_secret_get_value[] = {
{.name = "secret",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("secret UUID"),
.completer = virshSecretUUIDCompleter,
},
{.name = "plain",
.type = VSH_OT_BOOL,
.help = N_("get value without converting to base64")
},
{.name = NULL}
};
static bool
cmdSecretGetValue(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshSecret) secret = NULL;
g_autofree unsigned char *value = NULL;
size_t value_size;
bool plain = vshCommandOptBool(cmd, "plain");
if (!(secret = virshCommandOptSecret(ctl, cmd, NULL)))
return false;
if (!(value = virSecretGetValue(secret, &value_size, 0)))
return false;
if (plain) {
if (fwrite(value, 1, value_size, stdout) != value_size) {
virSecureErase(value, value_size);
vshError(ctl, "failed to write secret");
return false;
}
} else {
g_autofree char *base64 = g_base64_encode(value, value_size);
vshPrint(ctl, "%s", base64);
virSecureEraseString(base64);
}
virSecureErase(value, value_size);
return true;
}
/*
* "secret-undefine" command
*/
static const vshCmdInfo info_secret_undefine[] = {
{.name = "help",
.data = N_("undefine a secret")
},
{.name = "desc",
.data = N_("Undefine a secret.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_secret_undefine[] = {
{.name = "secret",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("secret UUID"),
.completer = virshSecretUUIDCompleter,
},
{.name = NULL}
};
static bool
cmdSecretUndefine(vshControl *ctl, const vshCmd *cmd)
{
virSecretPtr secret;
bool ret = false;
const char *uuid;
secret = virshCommandOptSecret(ctl, cmd, &uuid);
if (secret == NULL)
return false;
if (virSecretUndefine(secret) < 0) {
vshError(ctl, _("Failed to delete secret %s"), uuid);
goto cleanup;
}
vshPrintExtra(ctl, _("Secret %s deleted\n"), uuid);
ret = true;
cleanup:
virshSecretFree(secret);
return ret;
}
static int
virshSecretSorter(const void *a, const void *b)
{
virSecretPtr *sa = (virSecretPtr *) a;
virSecretPtr *sb = (virSecretPtr *) b;
char uuid_sa[VIR_UUID_STRING_BUFLEN];
char uuid_sb[VIR_UUID_STRING_BUFLEN];
if (*sa && !*sb)
return -1;
if (!*sa)
return *sb != NULL;
virSecretGetUUIDString(*sa, uuid_sa);
virSecretGetUUIDString(*sb, uuid_sb);
return vshStrcasecmp(uuid_sa, uuid_sb);
}
struct virshSecretList {
virSecretPtr *secrets;
size_t nsecrets;
};
static void
virshSecretListFree(struct virshSecretList *list)
{
size_t i;
if (list && list->secrets) {
for (i = 0; i < list->nsecrets; i++)
virshSecretFree(list->secrets[i]);
g_free(list->secrets);
}
g_free(list);
}
static struct virshSecretList *
virshSecretListCollect(vshControl *ctl,
unsigned int flags)
{
struct virshSecretList *list = g_new0(struct virshSecretList, 1);
size_t i;
int ret;
virSecretPtr secret;
bool success = false;
size_t deleted = 0;
int nsecrets = 0;
char **uuids = NULL;
virshControl *priv = ctl->privData;
/* try the list with flags support (0.10.2 and later) */
if ((ret = virConnectListAllSecrets(priv->conn,
&list->secrets,
flags)) >= 0) {
list->nsecrets = ret;
goto finished;
}
/* check if the command is actually supported */
if (last_error && last_error->code == VIR_ERR_NO_SUPPORT)
goto fallback;
/* there was an error during the call */
vshError(ctl, "%s", _("Failed to list node secrets"));
goto cleanup;
fallback:
/* fall back to old method (0.10.1 and older) */
vshResetLibvirtError();
if (flags) {
vshError(ctl, "%s", _("Filtering is not supported by this libvirt"));
goto cleanup;
}
nsecrets = virConnectNumOfSecrets(priv->conn);
if (nsecrets < 0) {
vshError(ctl, "%s", _("Failed to count secrets"));
goto cleanup;
}
if (nsecrets == 0)
return list;
uuids = g_new0(char *, nsecrets);
nsecrets = virConnectListSecrets(priv->conn, uuids, nsecrets);
if (nsecrets < 0) {
vshError(ctl, "%s", _("Failed to list secrets"));
goto cleanup;
}
list->secrets = g_new0(virSecretPtr, nsecrets);
list->nsecrets = 0;
/* get the secrets */
for (i = 0; i < nsecrets; i++) {
if (!(secret = virSecretLookupByUUIDString(priv->conn, uuids[i])))
continue;
list->secrets[list->nsecrets++] = secret;
}
/* truncate secrets that weren't found */
deleted = nsecrets - list->nsecrets;
finished:
/* sort the list */
if (list->secrets && list->nsecrets)
qsort(list->secrets, list->nsecrets,
sizeof(*list->secrets), virshSecretSorter);
/* truncate the list for not found secret objects */
if (deleted)
VIR_SHRINK_N(list->secrets, list->nsecrets, deleted);
success = true;
cleanup:
if (nsecrets > 0) {
for (i = 0; i < nsecrets; i++)
VIR_FREE(uuids[i]);
VIR_FREE(uuids);
}
if (!success) {
virshSecretListFree(list);
list = NULL;
}
return list;
}
/*
* "secret-list" command
*/
static const vshCmdInfo info_secret_list[] = {
{.name = "help",
.data = N_("list secrets")
},
{.name = "desc",
.data = N_("Returns a list of secrets")
},
{.name = NULL}
};
static const vshCmdOptDef opts_secret_list[] = {
{.name = "ephemeral",
.type = VSH_OT_BOOL,
.help = N_("list ephemeral secrets")
},
{.name = "no-ephemeral",
.type = VSH_OT_BOOL,
.help = N_("list non-ephemeral secrets")
},
{.name = "private",
.type = VSH_OT_BOOL,
.help = N_("list private secrets")
},
{.name = "no-private",
.type = VSH_OT_BOOL,
.help = N_("list non-private secrets")
},
{.name = NULL}
};
static bool
cmdSecretList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
{
size_t i;
struct virshSecretList *list = NULL;
bool ret = false;
unsigned int flags = 0;
g_autoptr(vshTable) table = NULL;
if (vshCommandOptBool(cmd, "ephemeral"))
flags |= VIR_CONNECT_LIST_SECRETS_EPHEMERAL;
if (vshCommandOptBool(cmd, "no-ephemeral"))
flags |= VIR_CONNECT_LIST_SECRETS_NO_EPHEMERAL;
if (vshCommandOptBool(cmd, "private"))
flags |= VIR_CONNECT_LIST_SECRETS_PRIVATE;
if (vshCommandOptBool(cmd, "no-private"))
flags |= VIR_CONNECT_LIST_SECRETS_NO_PRIVATE;
if (!(list = virshSecretListCollect(ctl, flags)))
return false;
table = vshTableNew(_("UUID"), _("Usage"), NULL);
if (!table)
goto cleanup;
for (i = 0; i < list->nsecrets; i++) {
virSecretPtr sec = list->secrets[i];
int usageType = virSecretGetUsageType(sec);
const char *usageStr = virSecretUsageTypeToString(usageType);
char uuid[VIR_UUID_STRING_BUFLEN];
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
g_autofree char *usage = NULL;
if (virSecretGetUUIDString(sec, uuid) < 0) {
vshError(ctl, "%s", _("Failed to get uuid of secret"));
goto cleanup;
}
if (usageType) {
virBufferStrcat(&buf, usageStr, " ",
virSecretGetUsageID(sec), NULL);
usage = virBufferContentAndReset(&buf);
if (!usage)
goto cleanup;
if (vshTableRowAppend(table, uuid, usage, NULL) < 0)
goto cleanup;
} else {
if (vshTableRowAppend(table, uuid, _("Unused"), NULL) < 0)
goto cleanup;
}
}
vshTablePrintToStdout(table, ctl);
ret = true;
cleanup:
virshSecretListFree(list);
return ret;
}
/*
* "Secret-event" command
*/
VIR_ENUM_DECL(virshSecretEvent);
VIR_ENUM_IMPL(virshSecretEvent,
VIR_SECRET_EVENT_LAST,
N_("Defined"),
N_("Undefined"));
static const char *
virshSecretEventToString(int event)
{
const char *str = virshSecretEventTypeToString(event);
return str ? _(str) : _("unknown");
}
struct virshSecretEventData {
vshControl *ctl;
bool loop;
bool timestamp;
int count;
virshSecretEventCallback *cb;
};
typedef struct virshSecretEventData virshSecretEventData;
static void
vshEventLifecyclePrint(virConnectPtr conn G_GNUC_UNUSED,
virSecretPtr secret,
int event,
int detail G_GNUC_UNUSED,
void *opaque)
{
virshSecretEventData *data = opaque;
char uuid[VIR_UUID_STRING_BUFLEN];
if (!data->loop && data->count)
return;
virSecretGetUUIDString(secret, uuid);
if (data->timestamp) {
char timestamp[VIR_TIME_STRING_BUFLEN];
if (virTimeStringNowRaw(timestamp) < 0)
timestamp[0] = '\0';
vshPrint(data->ctl, _("%s: event 'lifecycle' for secret %s: %s\n"),
timestamp, uuid, virshSecretEventToString(event));
} else {
vshPrint(data->ctl, _("event 'lifecycle' for secret %s: %s\n"),
uuid, virshSecretEventToString(event));
}
data->count++;
if (!data->loop)
vshEventDone(data->ctl);
}
static void
vshEventGenericPrint(virConnectPtr conn G_GNUC_UNUSED,
virSecretPtr secret,
void *opaque)
{
virshSecretEventData *data = opaque;
char uuid[VIR_UUID_STRING_BUFLEN];
if (!data->loop && data->count)
return;
virSecretGetUUIDString(secret, uuid);
if (data->timestamp) {
char timestamp[VIR_TIME_STRING_BUFLEN];
if (virTimeStringNowRaw(timestamp) < 0)
timestamp[0] = '\0';
vshPrint(data->ctl, _("%s: event '%s' for secret %s\n"),
timestamp,
data->cb->name,
uuid);
} else {
vshPrint(data->ctl, _("event '%s' for secret %s\n"),
data->cb->name,
uuid);
}
data->count++;
if (!data->loop)
vshEventDone(data->ctl);
}
virshSecretEventCallback virshSecretEventCallbacks[] = {
{ "lifecycle",
VIR_SECRET_EVENT_CALLBACK(vshEventLifecyclePrint), },
{ "value-changed", vshEventGenericPrint, },
};
G_STATIC_ASSERT(VIR_SECRET_EVENT_ID_LAST == G_N_ELEMENTS(virshSecretEventCallbacks));
static const vshCmdInfo info_secret_event[] = {
{.name = "help",
.data = N_("Secret Events")
},
{.name = "desc",
.data = N_("List event types, or wait for secret events to occur")
},
{.name = NULL}
};
static const vshCmdOptDef opts_secret_event[] = {
{.name = "secret",
.type = VSH_OT_STRING,
.help = N_("filter by secret name or uuid"),
.completer = virshSecretUUIDCompleter,
},
{.name = "event",
.type = VSH_OT_STRING,
.completer = virshSecretEventNameCompleter,
.help = N_("which event type to wait for")
},
{.name = "loop",
.type = VSH_OT_BOOL,
.help = N_("loop until timeout or interrupt, rather than one-shot")
},
{.name = "timeout",
.type = VSH_OT_INT,
.help = N_("timeout seconds")
},
{.name = "list",
.type = VSH_OT_BOOL,
.help = N_("list valid event types")
},
{.name = "timestamp",
.type = VSH_OT_BOOL,
.help = N_("show timestamp for each printed event")
},
{.name = NULL}
};
static bool
cmdSecretEvent(vshControl *ctl, const vshCmd *cmd)
{
virSecretPtr secret = NULL;
bool ret = false;
int eventId = -1;
int timeout = 0;
virshSecretEventData data;
const char *eventName = NULL;
int event;
virshControl *priv = ctl->privData;
if (vshCommandOptBool(cmd, "list")) {
size_t i;
for (i = 0; i < VIR_SECRET_EVENT_ID_LAST; i++)
vshPrint(ctl, "%s\n", virshSecretEventCallbacks[i].name);
return true;
}
if (vshCommandOptStringReq(ctl, cmd, "event", &eventName) < 0)
return false;
if (!eventName) {
vshError(ctl, "%s", _("either --list or --event <type> is required"));
return false;
}
for (event = 0; event < VIR_SECRET_EVENT_ID_LAST; event++)
if (STREQ(eventName, virshSecretEventCallbacks[event].name))
break;
if (event == VIR_SECRET_EVENT_ID_LAST) {
vshError(ctl, _("unknown event type %s"), eventName);
return false;
}
data.ctl = ctl;
data.loop = vshCommandOptBool(cmd, "loop");
data.timestamp = vshCommandOptBool(cmd, "timestamp");
data.count = 0;
data.cb = &virshSecretEventCallbacks[event];
if (vshCommandOptTimeoutToMs(ctl, cmd, &timeout) < 0)
return false;
if (vshCommandOptBool(cmd, "secret"))
secret = virshCommandOptSecret(ctl, cmd, NULL);
if (vshEventStart(ctl, timeout) < 0)
goto cleanup;
if ((eventId = virConnectSecretEventRegisterAny(priv->conn, secret, event,
data.cb->cb,
&data, NULL)) < 0)
goto cleanup;
switch (vshEventWait(ctl)) {
case VSH_EVENT_INTERRUPT:
vshPrint(ctl, "%s", _("event loop interrupted\n"));
break;
case VSH_EVENT_TIMEOUT:
vshPrint(ctl, "%s", _("event loop timed out\n"));
break;
case VSH_EVENT_DONE:
break;
default:
goto cleanup;
}
vshPrint(ctl, _("events received: %d\n"), data.count);
if (data.count)
ret = true;
cleanup:
vshEventCleanup(ctl);
if (eventId >= 0 &&
virConnectSecretEventDeregisterAny(priv->conn, eventId) < 0)
ret = false;
virshSecretFree(secret);
return ret;
}
const vshCmdDef secretCmds[] = {
{.name = "secret-define",
.handler = cmdSecretDefine,
.opts = opts_secret_define,
.info = info_secret_define,
.flags = 0
},
{.name = "secret-dumpxml",
.handler = cmdSecretDumpXML,
.opts = opts_secret_dumpxml,
.info = info_secret_dumpxml,
.flags = 0
},
{.name = "secret-event",
.handler = cmdSecretEvent,
.opts = opts_secret_event,
.info = info_secret_event,
.flags = 0
},
{.name = "secret-get-value",
.handler = cmdSecretGetValue,
.opts = opts_secret_get_value,
.info = info_secret_get_value,
.flags = 0
},
{.name = "secret-list",
.handler = cmdSecretList,
.opts = opts_secret_list,
.info = info_secret_list,
.flags = 0
},
{.name = "secret-set-value",
.handler = cmdSecretSetValue,
.opts = opts_secret_set_value,
.info = info_secret_set_value,
.flags = 0
},
{.name = "secret-undefine",
.handler = cmdSecretUndefine,
.opts = opts_secret_undefine,
.info = info_secret_undefine,
.flags = 0
},
{.name = NULL}
};
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