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vnc: call sasl_server_init() only when required

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VNC server is calling sasl_server_init() during startup of QEMU, even
if SASL auth has not been enabled.

This may create undesirable warnings like "Could not find keytab file:
/etc/qemu/krb5.tab" when the user didn't configure SASL on host and
started VNC server.

Instead, only initialize SASL when needed. Note that HMP/QMP "change
vnc" calls vnc_display_open() again, which will initialize SASL if
needed.

Fix assignment in if condition, while touching this code.

Related to:
https://bugzilla.redhat.com/show_bug.cgi?id=1609327

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20180907063634.359-1-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-09-07 10:36:34 +04:00 committed by Gerd Hoffmann
parent 6624c38d11
commit b5dc0d7d56
1 changed files with 8 additions and 7 deletions
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9
ui/vnc.c
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@ -3821,9 +3821,6 @@ void vnc_display_open(const char *id, Error **errp)
bool reverse = false;
const char *credid;
bool sasl = false;
#ifdef CONFIG_VNC_SASL
int saslErr;
#endif
int acl = 0;
int lock_key_sync = 1;
int key_delay_ms;
@ -3963,11 +3960,15 @@ void vnc_display_open(const char *id, Error **errp)
trace_vnc_auth_init(vd, 1, vd->ws_auth, vd->ws_subauth);
#ifdef CONFIG_VNC_SASL
if ((saslErr = sasl_server_init(NULL, "qemu")) != SASL_OK) {
if (sasl) {
int saslErr = sasl_server_init(NULL, "qemu");
if (saslErr != SASL_OK) {
error_setg(errp, "Failed to initialize SASL auth: %s",
sasl_errstring(saslErr, NULL, NULL));
goto fail;
}
}
#endif
vd->lock_key_sync = lock_key_sync;
if (lock_key_sync) {