[PATCH v8 0/3] vnc: support reload x509 certificates

[PATCH v8 0/3] vnc: support reload x509 certificates

[Zihao Chang]

This series supports reload x509 certificates for vnc
1. Support reload x509 certificates.
2. Support reload vnc certificates.
3. Add new qmp display-reload and implement reload x509 certificates for vnc.

Example:
{"execute": "display-reload", "arguments":{"type": "vnc", "tls-certs": true}}

Zihao Chang (3):
  crypto: add reload for QCryptoTLSCredsClass
  vnc: support reload x509 certificates for vnc
  qmp: add new qmp display-reload

 crypto/tlscredsx509.c     | 48 ++++++++++++++++++++++++++++++
 include/crypto/tlscreds.h |  8 +++--
 include/ui/console.h      |  1 +
 monitor/qmp-cmds.c        | 17 +++++++++++
 qapi/ui.json              | 61 +++++++++++++++++++++++++++++++++++++++
 ui/vnc.c                  | 28 ++++++++++++++++++
 6 files changed, 160 insertions(+), 3 deletions(-)

-- 
2.28.0

[PATCH v8 1/3] crypto: add reload for QCryptoTLSCredsClass

[Zihao Chang]

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This patch adds reload interface for QCryptoTLSCredsClass and implements
the interface for QCryptoTLSCredsX509.

Signed-off-by: Zihao Chang <changzihao1@huawei.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
---
 crypto/tlscredsx509.c     | 48 +++++++++++++++++++++++++++++++++++++++
 include/crypto/tlscreds.h |  8 ++++---
 2 files changed, 53 insertions(+), 3 deletions(-)

diff --git a/crypto/tlscredsx509.c b/crypto/tlscredsx509.c
index dbadad4df28e..bc503bab5585 100644
--- a/crypto/tlscredsx509.c
+++ b/crypto/tlscredsx509.c
@@ -770,6 +770,51 @@ qcrypto_tls_creds_x509_prop_get_sanity(Object *obj,
 }
 
 
+#ifdef CONFIG_GNUTLS
+
+
+static bool
+qcrypto_tls_creds_x509_reload(QCryptoTLSCreds *creds, Error **errp)
+{
+    QCryptoTLSCredsX509 *x509_creds = QCRYPTO_TLS_CREDS_X509(creds);
+    Error *local_err = NULL;
+    gnutls_certificate_credentials_t creds_data = x509_creds->data;
+    gnutls_dh_params_t creds_dh_params = x509_creds->parent_obj.dh_params;
+
+    x509_creds->data = NULL;
+    x509_creds->parent_obj.dh_params = NULL;
+    qcrypto_tls_creds_x509_load(x509_creds, &local_err);
+    if (local_err) {
+        qcrypto_tls_creds_x509_unload(x509_creds);
+        x509_creds->data = creds_data;
+        x509_creds->parent_obj.dh_params = creds_dh_params;
+        error_propagate(errp, local_err);
+        return false;
+    }
+
+    if (creds_data) {
+        gnutls_certificate_free_credentials(creds_data);
+    }
+    if (creds_dh_params) {
+        gnutls_dh_params_deinit(creds_dh_params);
+    }
+    return true;
+}
+
+
+#else /* ! CONFIG_GNUTLS */
+
+
+static bool
+qcrypto_tls_creds_x509_reload(QCryptoTLSCreds *creds, Error **errp)
+{
+    return false;
+}
+
+
+#endif /* ! CONFIG_GNUTLS */
+
+
 static void
 qcrypto_tls_creds_x509_complete(UserCreatable *uc, Error **errp)
 {
@@ -800,6 +845,9 @@ static void
 qcrypto_tls_creds_x509_class_init(ObjectClass *oc, void *data)
 {
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
+    QCryptoTLSCredsClass *ctcc = QCRYPTO_TLS_CREDS_CLASS(oc);
+
+    ctcc->reload = qcrypto_tls_creds_x509_reload;
 
     ucc->complete = qcrypto_tls_creds_x509_complete;
 
diff --git a/include/crypto/tlscreds.h b/include/crypto/tlscreds.h
index 079e37604784..d0808e391e91 100644
--- a/include/crypto/tlscreds.h
+++ b/include/crypto/tlscreds.h
@@ -30,14 +30,15 @@
 
 #define TYPE_QCRYPTO_TLS_CREDS "tls-creds"
 typedef struct QCryptoTLSCreds QCryptoTLSCreds;
-DECLARE_INSTANCE_CHECKER(QCryptoTLSCreds, QCRYPTO_TLS_CREDS,
-                         TYPE_QCRYPTO_TLS_CREDS)
-
 typedef struct QCryptoTLSCredsClass QCryptoTLSCredsClass;
+DECLARE_OBJ_CHECKERS(QCryptoTLSCreds, QCryptoTLSCredsClass, QCRYPTO_TLS_CREDS,
+                     TYPE_QCRYPTO_TLS_CREDS)
+
 
 #define QCRYPTO_TLS_CREDS_DH_PARAMS "dh-params.pem"
 
 
+typedef bool (*CryptoTLSCredsReload)(QCryptoTLSCreds *, Error **);
 /**
  * QCryptoTLSCreds:
  *
@@ -61,6 +62,7 @@ struct QCryptoTLSCreds {
 
 struct QCryptoTLSCredsClass {
     ObjectClass parent_class;
+    CryptoTLSCredsReload reload;
 };
 
 
-- 
2.28.0

[PATCH v8 2/3] vnc: support reload x509 certificates for vnc

[Zihao Chang]

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This patch add vnc_display_reload_certs() to support
update x509 certificates.

Signed-off-by: Zihao Chang <changzihao1@huawei.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
---
 include/ui/console.h |  1 +
 ui/vnc.c             | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index c960b7066ccd..2714038a0fae 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -476,6 +476,7 @@ int vnc_display_password(const char *id, const char *password);
 int vnc_display_pw_expire(const char *id, time_t expires);
 void vnc_parse(const char *str);
 int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp);
+bool vnc_display_reload_certs(const char *id,  Error **errp);
 
 /* input.c */
 int index_from_key(const char *key, size_t key_length);
diff --git a/ui/vnc.c b/ui/vnc.c
index 310abc937812..381e21a87563 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -584,6 +584,34 @@ VncInfo2List *qmp_query_vnc_servers(Error **errp)
     return prev;
 }
 
+bool vnc_display_reload_certs(const char *id, Error **errp)
+{
+    VncDisplay *vd = vnc_display_find(id);
+    QCryptoTLSCredsClass *creds = NULL;
+
+    if (!vd) {
+        error_setg(errp, "Can not find vnc display");
+        return false;
+    }
+
+    if (!vd->tlscreds) {
+        error_setg(errp, "vnc tls is not enable");
+        return false;
+    }
+
+    creds = QCRYPTO_TLS_CREDS_GET_CLASS(OBJECT(vd->tlscreds));
+    if (creds->reload == NULL) {
+        error_setg(errp, "%s doesn't support to reload TLS credential",
+                   object_get_typename(OBJECT(vd->tlscreds)));
+        return false;
+    }
+    if (!creds->reload(vd->tlscreds, errp)) {
+        return false;
+    }
+
+    return true;
+}
+
 /* TODO
    1) Get the queue working for IO.
    2) there is some weirdness when using the -S option (the screen is grey
-- 
2.28.0

[PATCH v8 3/3] qmp: add new qmp display-reload

[Zihao Chang]

This patch provides a new qmp to reload display configuration
without restart VM, but only reloading the vnc tls certificates
is implemented.
Example:
{"execute": "display-reload", "arguments":{"type": "vnc", "tls-certs": true}}

Signed-off-by: Zihao Chang <changzihao1@huawei.com>
---
 monitor/qmp-cmds.c | 17 +++++++++++++
 qapi/ui.json       | 61 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)

diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c
index c7df8c0ee268..f7d64a64577a 100644
--- a/monitor/qmp-cmds.c
+++ b/monitor/qmp-cmds.c
@@ -334,3 +334,20 @@ MemoryInfo *qmp_query_memory_size_summary(Error **errp)
 
     return mem_info;
 }
+
+void qmp_display_reload(DisplayReloadOptions *arg, Error **errp)
+{
+    switch (arg->type) {
+    case DISPLAY_RELOAD_TYPE_VNC:
+#ifdef CONFIG_VNC
+        if (arg->u.vnc.has_tls_certs && arg->u.vnc.tls_certs) {
+            vnc_display_reload_certs(NULL, errp);
+        }
+#else
+        error_setg(errp, "vnc is invalid, missing 'CONFIG_VNC'");
+#endif
+        break;
+    default:
+        abort();
+    }
+}
diff --git a/qapi/ui.json b/qapi/ui.json
index d08d72b43923..e39159eae022 100644
--- a/qapi/ui.json
+++ b/qapi/ui.json
@@ -1179,3 +1179,64 @@
 ##
 { 'command': 'query-display-options',
   'returns': 'DisplayOptions' }
+
+##
+# @DisplayReloadType:
+#
+# Available DisplayReload types.
+#
+# @vnc: VNC display
+#
+# Since: 6.0
+#
+##
+{ 'enum': 'DisplayReloadType',
+  'data': ['vnc'] }
+
+##
+# @DisplayReloadOptionsVNC:
+#
+# Specify the VNC reload options.
+#
+# @tls-certs: reload tls certs or not.
+#
+# Since: 6.0
+#
+##
+{ 'struct': 'DisplayReloadOptionsVNC',
+  'data': { '*tls-certs': 'bool' } }
+
+##
+# @DisplayReloadOptions:
+#
+# Options of the display configuration reload.
+#
+# @type: Specify the display type.
+#
+# Since: 6.0
+#
+##
+{ 'union': 'DisplayReloadOptions',
+  'base': {'type': 'DisplayReloadType'},
+  'discriminator': 'type',
+  'data': { 'vnc': 'DisplayReloadOptionsVNC' } }
+
+##
+# @display-reload:
+#
+# Reload display configuration.
+#
+# Returns: Nothing on success.
+#
+# Since: 6.0
+#
+# Example:
+#
+# -> { "execute": "display-reload",
+#      "arguments": { "type": "vnc", "tls-certs": true  } }
+# <- { "return": {} }
+#
+##
+{ 'command': 'display-reload',
+  'data': 'DisplayReloadOptions',
+  'boxed' : true }
-- 
2.28.0

Re: [PATCH v8 0/3] vnc: support reload x509 certificates

[Gerd Hoffmann]

On Tue, Mar 16, 2021 at 03:58:42PM +0800, Zihao Chang wrote:
> This series supports reload x509 certificates for vnc
> 1. Support reload x509 certificates.
> 2. Support reload vnc certificates.
> 3. Add new qmp display-reload and implement reload x509 certificates for vnc.

Added to ui queue.

thanks,
  Gerd