crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
/*
|
|
|
|
* QEMU crypto TLS anonymous credential support
|
|
|
|
*
|
|
|
|
* Copyright (c) 2015 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
|
2019-02-13 16:54:59 +01:00
|
|
|
* version 2.1 of the License, or (at your option) any later version.
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
*
|
|
|
|
* 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/>.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2016-01-26 19:16:55 +01:00
|
|
|
#include "qemu/osdep.h"
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
#include "crypto/tlscredsanon.h"
|
2018-05-03 21:50:23 +02:00
|
|
|
#include "tlscredspriv.h"
|
include/qemu/osdep.h: Don't include qapi/error.h
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the
Error typedef. Since then, we've moved to include qemu/osdep.h
everywhere. Its file comment explains: "To avoid getting into
possible circular include dependencies, this file should not include
any other QEMU headers, with the exceptions of config-host.h,
compiler.h, os-posix.h and os-win32.h, all of which are doing a
similar job to this file and are under similar constraints."
qapi/error.h doesn't do a similar job, and it doesn't adhere to
similar constraints: it includes qapi-types.h. That's in excess of
100KiB of crap most .c files don't actually need.
Add the typedef to qemu/typedefs.h, and include that instead of
qapi/error.h. Include qapi/error.h in .c files that need it and don't
get it now. Include qapi-types.h in qom/object.h for uint16List.
Update scripts/clean-includes accordingly. Update it further to match
reality: replace config.h by config-target.h, add sysemu/os-posix.h,
sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h
comment quoted above similarly.
This reduces the number of objects depending on qapi/error.h from "all
of them" to less than a third. Unfortunately, the number depending on
qapi-types.h shrinks only a little. More work is needed for that one.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
[Fix compilation without the spice devel packages. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-14 09:01:28 +01:00
|
|
|
#include "qapi/error.h"
|
2019-05-23 16:35:07 +02:00
|
|
|
#include "qemu/module.h"
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
#include "qom/object_interfaces.h"
|
|
|
|
#include "trace.h"
|
|
|
|
|
|
|
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|
|
#ifdef CONFIG_GNUTLS
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|
|
|
|
|
|
static int
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|
|
|
qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds,
|
|
|
|
Error **errp)
|
|
|
|
{
|
2019-07-23 17:22:36 +02:00
|
|
|
g_autofree char *dhparams = NULL;
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
trace_qcrypto_tls_creds_anon_load(creds,
|
|
|
|
creds->parent_obj.dir ? creds->parent_obj.dir : "<nodir>");
|
|
|
|
|
|
|
|
if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
|
|
|
|
if (qcrypto_tls_creds_get_path(&creds->parent_obj,
|
|
|
|
QCRYPTO_TLS_CREDS_DH_PARAMS,
|
|
|
|
false, &dhparams, errp) < 0) {
|
2019-07-23 17:22:36 +02:00
|
|
|
return -1;
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = gnutls_anon_allocate_server_credentials(&creds->data.server);
|
|
|
|
if (ret < 0) {
|
|
|
|
error_setg(errp, "Cannot allocate credentials: %s",
|
|
|
|
gnutls_strerror(ret));
|
2019-07-23 17:22:36 +02:00
|
|
|
return -1;
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
if (qcrypto_tls_creds_get_dh_params_file(&creds->parent_obj, dhparams,
|
|
|
|
&creds->parent_obj.dh_params,
|
|
|
|
errp) < 0) {
|
2019-07-23 17:22:36 +02:00
|
|
|
return -1;
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
gnutls_anon_set_server_dh_params(creds->data.server,
|
|
|
|
creds->parent_obj.dh_params);
|
|
|
|
} else {
|
|
|
|
ret = gnutls_anon_allocate_client_credentials(&creds->data.client);
|
|
|
|
if (ret < 0) {
|
|
|
|
error_setg(errp, "Cannot allocate credentials: %s",
|
|
|
|
gnutls_strerror(ret));
|
2019-07-23 17:22:36 +02:00
|
|
|
return -1;
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-07-23 17:22:36 +02:00
|
|
|
return 0;
|
crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds)
|
|
|
|
{
|
|
|
|
if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
|
|
|
|
if (creds->data.client) {
|
|
|
|
gnutls_anon_free_client_credentials(creds->data.client);
|
|
|
|
creds->data.client = NULL;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (creds->data.server) {
|
|
|
|
gnutls_anon_free_server_credentials(creds->data.server);
|
|
|
|
creds->data.server = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (creds->parent_obj.dh_params) {
|
|
|
|
gnutls_dh_params_deinit(creds->parent_obj.dh_params);
|
|
|
|
creds->parent_obj.dh_params = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#else /* ! CONFIG_GNUTLS */
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
qcrypto_tls_creds_anon_load(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED,
|
|
|
|
Error **errp)
|
|
|
|
{
|
|
|
|
error_setg(errp, "TLS credentials support requires GNUTLS");
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED)
|
|
|
|
{
|
|
|
|
/* nada */
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#endif /* ! CONFIG_GNUTLS */
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
qcrypto_tls_creds_anon_prop_set_loaded(Object *obj,
|
|
|
|
bool value,
|
|
|
|
Error **errp)
|
|
|
|
{
|
|
|
|
QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
|
|
|
|
|
|
|
|
if (value) {
|
|
|
|
qcrypto_tls_creds_anon_load(creds, errp);
|
|
|
|
} else {
|
|
|
|
qcrypto_tls_creds_anon_unload(creds);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_GNUTLS
|
|
|
|
|
|
|
|
|
|
|
|
static bool
|
|
|
|
qcrypto_tls_creds_anon_prop_get_loaded(Object *obj,
|
|
|
|
Error **errp G_GNUC_UNUSED)
|
|
|
|
{
|
|
|
|
QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
|
|
|
|
|
|
|
|
if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
|
|
|
|
return creds->data.server != NULL;
|
|
|
|
} else {
|
|
|
|
return creds->data.client != NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#else /* ! CONFIG_GNUTLS */
|
|
|
|
|
|
|
|
|
|
|
|
static bool
|
|
|
|
qcrypto_tls_creds_anon_prop_get_loaded(Object *obj G_GNUC_UNUSED,
|
|
|
|
Error **errp G_GNUC_UNUSED)
|
|
|
|
{
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#endif /* ! CONFIG_GNUTLS */
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
qcrypto_tls_creds_anon_complete(UserCreatable *uc, Error **errp)
|
|
|
|
{
|
|
|
|
object_property_set_bool(OBJECT(uc), true, "loaded", errp);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
qcrypto_tls_creds_anon_finalize(Object *obj)
|
|
|
|
{
|
|
|
|
QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
|
|
|
|
|
|
|
|
qcrypto_tls_creds_anon_unload(creds);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data)
|
|
|
|
{
|
|
|
|
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
|
|
|
|
|
|
|
|
ucc->complete = qcrypto_tls_creds_anon_complete;
|
2015-08-24 19:46:57 +02:00
|
|
|
|
|
|
|
object_class_property_add_bool(oc, "loaded",
|
|
|
|
qcrypto_tls_creds_anon_prop_get_loaded,
|
qom: Drop parameter @errp of object_property_add() & friends
The only way object_property_add() can fail is when a property with
the same name already exists. Since our property names are all
hardcoded, failure is a programming error, and the appropriate way to
handle it is passing &error_abort.
Same for its variants, except for object_property_add_child(), which
additionally fails when the child already has a parent. Parentage is
also under program control, so this is a programming error, too.
We have a bit over 500 callers. Almost half of them pass
&error_abort, slightly fewer ignore errors, one test case handles
errors, and the remaining few callers pass them to their own callers.
The previous few commits demonstrated once again that ignoring
programming errors is a bad idea.
Of the few ones that pass on errors, several violate the Error API.
The Error ** argument must be NULL, &error_abort, &error_fatal, or a
pointer to a variable containing NULL. Passing an argument of the
latter kind twice without clearing it in between is wrong: if the
first call sets an error, it no longer points to NULL for the second
call. ich9_pm_add_properties(), sparc32_ledma_realize(),
sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize()
are wrong that way.
When the one appropriate choice of argument is &error_abort, letting
users pick the argument is a bad idea.
Drop parameter @errp and assert the preconditions instead.
There's one exception to "duplicate property name is a programming
error": the way object_property_add() implements the magic (and
undocumented) "automatic arrayification". Don't drop @errp there.
Instead, rename object_property_add() to object_property_try_add(),
and add the obvious wrapper object_property_add().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200505152926.18877-15-armbru@redhat.com>
[Two semantic rebase conflicts resolved]
2020-05-05 17:29:22 +02:00
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qcrypto_tls_creds_anon_prop_set_loaded);
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crypto: introduce new module for TLS anonymous credentials
Introduce a QCryptoTLSCredsAnon class which is used to
manage anonymous TLS credentials. Use of this class is
generally discouraged since it does not offer strong
security, but it is required for backwards compatibility
with the current VNC server implementation.
Simple example CLI configuration:
$QEMU -object tls-creds-anon,id=tls0,endpoint=server
Example using pre-created diffie-hellman parameters
$QEMU -object tls-creds-anon,id=tls0,endpoint=server,\
dir=/path/to/creds/dir
The 'id' value in the -object args will be used to associate the
credentials with the network services. For example, when the VNC
server is later converted it would use
$QEMU -object tls-creds-anon,id=tls0,.... \
-vnc 127.0.0.1:1,tls-creds=tls0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2015-03-13 18:39:26 +01:00
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}
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static const TypeInfo qcrypto_tls_creds_anon_info = {
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.parent = TYPE_QCRYPTO_TLS_CREDS,
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.name = TYPE_QCRYPTO_TLS_CREDS_ANON,
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.instance_size = sizeof(QCryptoTLSCredsAnon),
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.instance_finalize = qcrypto_tls_creds_anon_finalize,
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.class_size = sizeof(QCryptoTLSCredsAnonClass),
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.class_init = qcrypto_tls_creds_anon_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_tls_creds_anon_register_types(void)
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{
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type_register_static(&qcrypto_tls_creds_anon_info);
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}
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type_init(qcrypto_tls_creds_anon_register_types);
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