Neither the VNC or SPICE code for password changes provides error reporting at source, leading the callers to report a largely useless generic error message. Fixing this removes one of the two remaining needs for the undesirable error_printf_unless_qmp() method. While fixing this the error message hint is improved to recommend the 'password-secret' option which allows securely passing a password at startup. Reported-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> --- include/ui/console.h | 2 +- include/ui/qemu-spice-module.h | 3 ++- tests/functional/generic/test_vnc.py | 4 ++-- ui/spice-core.c | 25 ++++++++++++++++++------- ui/spice-module.c | 7 ++++--- ui/ui-qmp-cmds.c | 19 ++++++------------- ui/vnc-stubs.c | 6 +++--- ui/vnc.c | 10 +++++++--- 8 files changed, 43 insertions(+), 33 deletions(-) diff --git a/include/ui/console.h b/include/ui/console.h index 98feaa58bd..3677a9d334 100644 --- a/include/ui/console.h +++ b/include/ui/console.h @@ -457,7 +457,7 @@ void qemu_display_help(void); void vnc_display_init(const char *id, Error **errp); void vnc_display_open(const char *id, Error **errp); void vnc_display_add_client(const char *id, int csock, bool skipauth); -int vnc_display_password(const char *id, const char *password); +int vnc_display_password(const char *id, const char *password, Error **errp); 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); diff --git a/include/ui/qemu-spice-module.h b/include/ui/qemu-spice-module.h index 1f22d557ea..072efa0c83 100644 --- a/include/ui/qemu-spice-module.h +++ b/include/ui/qemu-spice-module.h @@ -29,7 +29,8 @@ struct QemuSpiceOps { void (*display_init)(void); int (*migrate_info)(const char *h, int p, int t, const char *s); int (*set_passwd)(const char *passwd, - bool fail_if_connected, bool disconnect_if_connected); + bool fail_if_connected, bool disconnect_if_connected, + Error **errp); int (*set_pw_expire)(time_t expires); int (*display_add_client)(int csock, int skipauth, int tls); #ifdef CONFIG_SPICE diff --git a/tests/functional/generic/test_vnc.py b/tests/functional/generic/test_vnc.py index f1dd1597cf..097f858ca1 100755 --- a/tests/functional/generic/test_vnc.py +++ b/tests/functional/generic/test_vnc.py @@ -48,7 +48,7 @@ def test_no_vnc_change_password(self): self.assertEqual(set_password_response['error']['class'], 'GenericError') self.assertEqual(set_password_response['error']['desc'], - 'Could not set password') + 'No VNC display is present'); def launch_guarded(self): try: @@ -73,7 +73,7 @@ def test_change_password_requires_a_password(self): self.assertEqual(set_password_response['error']['class'], 'GenericError') self.assertEqual(set_password_response['error']['desc'], - 'Could not set password') + 'VNC password authentication is disabled') def test_change_password(self): self.set_machine('none') diff --git a/ui/spice-core.c b/ui/spice-core.c index ee13ecc4a5..ef1c00134f 100644 --- a/ui/spice-core.c +++ b/ui/spice-core.c @@ -757,7 +757,7 @@ static void qemu_spice_init(void) tls_ciphers); } if (password) { - qemu_spice.set_passwd(password, false, false); + qemu_spice.set_passwd(password, false, false, NULL); } if (qemu_opt_get_bool(opts, "sasl", 0)) { if (spice_server_set_sasl(spice_server, 1) == -1) { @@ -920,8 +920,10 @@ int qemu_spice_add_display_interface(QXLInstance *qxlin, QemuConsole *con) return qemu_spice_add_interface(&qxlin->base); } -static int qemu_spice_set_ticket(bool fail_if_conn, bool disconnect_if_conn) +static int qemu_spice_set_ticket(bool fail_if_conn, bool disconnect_if_conn, + Error **errp) { + int ret; time_t lifetime, now = time(NULL); char *passwd; @@ -935,26 +937,35 @@ static int qemu_spice_set_ticket(bool fail_if_conn, bool disconnect_if_conn) passwd = NULL; lifetime = 1; } - return spice_server_set_ticket(spice_server, passwd, lifetime, - fail_if_conn, disconnect_if_conn); + ret = spice_server_set_ticket(spice_server, passwd, lifetime, + fail_if_conn, disconnect_if_conn); + if (ret < 0) { + error_setg(errp, "Unable to set SPICE server ticket"); + return -1; + } + return 0; } static int qemu_spice_set_passwd(const char *passwd, - bool fail_if_conn, bool disconnect_if_conn) + bool fail_if_conn, bool disconnect_if_conn, + Error **errp) { if (strcmp(auth, "spice") != 0) { + error_setg(errp, "SPICE authentication is disabled"); + error_append_hint(errp, + "To enable it use '-spice ...,password-secret=ID'"); return -1; } g_free(auth_passwd); auth_passwd = g_strdup(passwd); - return qemu_spice_set_ticket(fail_if_conn, disconnect_if_conn); + return qemu_spice_set_ticket(fail_if_conn, disconnect_if_conn, errp); } static int qemu_spice_set_pw_expire(time_t expires) { auth_expires = expires; - return qemu_spice_set_ticket(false, false); + return qemu_spice_set_ticket(false, false, NULL); } static int qemu_spice_display_add_client(int csock, int skipauth, int tls) diff --git a/ui/spice-module.c b/ui/spice-module.c index 3222335872..7651c85885 100644 --- a/ui/spice-module.c +++ b/ui/spice-module.c @@ -45,14 +45,15 @@ static int qemu_spice_migrate_info_stub(const char *h, int p, int t, static int qemu_spice_set_passwd_stub(const char *passwd, bool fail_if_connected, - bool disconnect_if_connected) + bool disconnect_if_connected, + Error **errp) { - return -1; + g_assert_not_reached(); } static int qemu_spice_set_pw_expire_stub(time_t expires) { - return -1; + g_assert_not_reached(); } static int qemu_spice_display_add_client_stub(int csock, int skipauth, diff --git a/ui/ui-qmp-cmds.c b/ui/ui-qmp-cmds.c index b49b636152..1173c82cf7 100644 --- a/ui/ui-qmp-cmds.c +++ b/ui/ui-qmp-cmds.c @@ -31,15 +31,14 @@ void qmp_set_password(SetPasswordOptions *opts, Error **errp) { - int rc; - if (opts->protocol == DISPLAY_PROTOCOL_SPICE) { if (!qemu_using_spice(errp)) { return; } - rc = qemu_spice.set_passwd(opts->password, - opts->connected == SET_PASSWORD_ACTION_FAIL, - opts->connected == SET_PASSWORD_ACTION_DISCONNECT); + qemu_spice.set_passwd(opts->password, + opts->connected == SET_PASSWORD_ACTION_FAIL, + opts->connected == SET_PASSWORD_ACTION_DISCONNECT, + errp); } else { assert(opts->protocol == DISPLAY_PROTOCOL_VNC); if (opts->connected != SET_PASSWORD_ACTION_KEEP) { @@ -52,11 +51,7 @@ void qmp_set_password(SetPasswordOptions *opts, Error **errp) * Note that setting an empty password will not disable login * through this interface. */ - rc = vnc_display_password(opts->u.vnc.display, opts->password); - } - - if (rc != 0) { - error_setg(errp, "Could not set password"); + vnc_display_password(opts->u.vnc.display, opts->password, errp); } } @@ -107,9 +102,7 @@ void qmp_expire_password(ExpirePasswordOptions *opts, Error **errp) #ifdef CONFIG_VNC void qmp_change_vnc_password(const char *password, Error **errp) { - if (vnc_display_password(NULL, password) < 0) { - error_setg(errp, "Could not set password"); - } + vnc_display_password(NULL, password, errp); } #endif diff --git a/ui/vnc-stubs.c b/ui/vnc-stubs.c index a96bc86236..5de9bf9d70 100644 --- a/ui/vnc-stubs.c +++ b/ui/vnc-stubs.c @@ -2,11 +2,11 @@ #include "ui/console.h" #include "qapi/error.h" -int vnc_display_password(const char *id, const char *password) +int vnc_display_password(const char *id, const char *password, Error **errp) { - return -ENODEV; + g_assert_not_reached(); } int vnc_display_pw_expire(const char *id, time_t expires) { - return -ENODEV; + g_assert_not_reached(); }; diff --git a/ui/vnc.c b/ui/vnc.c index daf5b01d34..8bf14cf9a7 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -3526,16 +3526,20 @@ static void vnc_display_close(VncDisplay *vd) #endif } -int vnc_display_password(const char *id, const char *password) +int vnc_display_password(const char *id, const char *password, Error **errp) { VncDisplay *vd = vnc_display_find(id); if (!vd) { + error_setg(errp, "No VNC display is present"); + error_append_hint(errp, + "To enable it, use '-vnc ...'"); return -EINVAL; } if (vd->auth == VNC_AUTH_NONE) { - error_printf_unless_qmp("If you want use passwords please enable " - "password auth using '-vnc ${dpy},password'.\n"); + error_setg(errp, "VNC password authentication is disabled"); + error_append_hint(errp, + "To enable it, use '-vnc ...,password-secret=ID'"); return -EINVAL; } -- 2.53.0