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ui: refactor method for setting up VncDisplay auth types 

There is a lot of repeated code in the auth type setup method,
particularly around checking TLS credential types. Refactor
it to reduce duplication and instead of having one method
do both plain and websockets at once, call it separately
for each.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1475163940-26094-6-git-send-email-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-09-29 16:45:36 +01:00 committed by Gerd Hoffmann
parent bf01c1794e
commit eda24e1886
2 changed files with 57 additions and 76 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

132
ui/vnc.c
View File

@ -3325,7 +3325,9 @@ static QemuOptsList qemu_vnc_opts = {
static int
vnc_display_setup_auth(VncDisplay *vd,
vnc_display_setup_auth(int *auth,
int *subauth,
QCryptoTLSCreds *tlscreds,
bool password,
bool sasl,
bool websocket,
@ -3378,86 +3380,56 @@ vnc_display_setup_auth(VncDisplay *vd,
* VNC auth mechs for plain VNC vs websockets VNC, the end
* result has the same security characteristics.
*/
if (password) {
if (vd->tlscreds) {
vd->auth = VNC_AUTH_VENCRYPT;
if (object_dynamic_cast(OBJECT(vd->tlscreds),
TYPE_QCRYPTO_TLS_CREDS_X509)) {
VNC_DEBUG("Initializing VNC server with x509 password auth\n");
vd->subauth = VNC_AUTH_VENCRYPT_X509VNC;
} else if (object_dynamic_cast(OBJECT(vd->tlscreds),
TYPE_QCRYPTO_TLS_CREDS_ANON)) {
VNC_DEBUG("Initializing VNC server with TLS password auth\n");
vd->subauth = VNC_AUTH_VENCRYPT_TLSVNC;
} else {
error_setg(errp,
"Unsupported TLS cred type %s",
object_get_typename(OBJECT(vd->tlscreds)));
return -1;
}
} else {
if (websocket || !tlscreds) {
if (password) {
VNC_DEBUG("Initializing VNC server with password auth\n");
vd->auth = VNC_AUTH_VNC;
vd->subauth = VNC_AUTH_INVALID;
}
if (websocket) {
vd->ws_auth = VNC_AUTH_VNC;
} else {
vd->ws_auth = VNC_AUTH_INVALID;
}
} else if (sasl) {
if (vd->tlscreds) {
vd->auth = VNC_AUTH_VENCRYPT;
if (object_dynamic_cast(OBJECT(vd->tlscreds),
TYPE_QCRYPTO_TLS_CREDS_X509)) {
VNC_DEBUG("Initializing VNC server with x509 SASL auth\n");
vd->subauth = VNC_AUTH_VENCRYPT_X509SASL;
} else if (object_dynamic_cast(OBJECT(vd->tlscreds),
TYPE_QCRYPTO_TLS_CREDS_ANON)) {
VNC_DEBUG("Initializing VNC server with TLS SASL auth\n");
vd->subauth = VNC_AUTH_VENCRYPT_TLSSASL;
} else {
error_setg(errp,
"Unsupported TLS cred type %s",
object_get_typename(OBJECT(vd->tlscreds)));
return -1;
}
} else {
*auth = VNC_AUTH_VNC;
} else if (sasl) {
VNC_DEBUG("Initializing VNC server with SASL auth\n");
vd->auth = VNC_AUTH_SASL;
vd->subauth = VNC_AUTH_INVALID;
}
if (websocket) {
vd->ws_auth = VNC_AUTH_SASL;
} else {
vd->ws_auth = VNC_AUTH_INVALID;
}
} else {
if (vd->tlscreds) {
vd->auth = VNC_AUTH_VENCRYPT;
if (object_dynamic_cast(OBJECT(vd->tlscreds),
TYPE_QCRYPTO_TLS_CREDS_X509)) {
VNC_DEBUG("Initializing VNC server with x509 no auth\n");
vd->subauth = VNC_AUTH_VENCRYPT_X509NONE;
} else if (object_dynamic_cast(OBJECT(vd->tlscreds),
TYPE_QCRYPTO_TLS_CREDS_ANON)) {
VNC_DEBUG("Initializing VNC server with TLS no auth\n");
vd->subauth = VNC_AUTH_VENCRYPT_TLSNONE;
} else {
error_setg(errp,
"Unsupported TLS cred type %s",
object_get_typename(OBJECT(vd->tlscreds)));
return -1;
}
*auth = VNC_AUTH_SASL;
} else {
VNC_DEBUG("Initializing VNC server with no auth\n");
vd->auth = VNC_AUTH_NONE;
vd->subauth = VNC_AUTH_INVALID;
*auth = VNC_AUTH_NONE;
}
if (websocket) {
vd->ws_auth = VNC_AUTH_NONE;
*subauth = VNC_AUTH_INVALID;
} else {
bool is_x509 = object_dynamic_cast(OBJECT(tlscreds),
TYPE_QCRYPTO_TLS_CREDS_X509) != NULL;
bool is_anon = object_dynamic_cast(OBJECT(tlscreds),
TYPE_QCRYPTO_TLS_CREDS_ANON) != NULL;
if (!is_x509 && !is_anon) {
error_setg(errp,
"Unsupported TLS cred type %s",
object_get_typename(OBJECT(tlscreds)));
return -1;
}
*auth = VNC_AUTH_VENCRYPT;
if (password) {
if (is_x509) {
VNC_DEBUG("Initializing VNC server with x509 password auth\n");
*subauth = VNC_AUTH_VENCRYPT_X509VNC;
} else {
VNC_DEBUG("Initializing VNC server with TLS password auth\n");
*subauth = VNC_AUTH_VENCRYPT_TLSVNC;
}
} else if (sasl) {
if (is_x509) {
VNC_DEBUG("Initializing VNC server with x509 SASL auth\n");
*subauth = VNC_AUTH_VENCRYPT_X509SASL;
} else {
VNC_DEBUG("Initializing VNC server with TLS SASL auth\n");
*subauth = VNC_AUTH_VENCRYPT_TLSSASL;
}
} else {
vd->ws_auth = VNC_AUTH_INVALID;
if (is_x509) {
VNC_DEBUG("Initializing VNC server with x509 no auth\n");
*subauth = VNC_AUTH_VENCRYPT_X509NONE;
} else {
VNC_DEBUG("Initializing VNC server with TLS no auth\n");
*subauth = VNC_AUTH_VENCRYPT_TLSNONE;
}
}
}
return 0;
@ -3769,7 +3741,15 @@ void vnc_display_open(const char *id, Error **errp)
}
#endif
if (vnc_display_setup_auth(vd, password, sasl, ws_enabled, errp) < 0) {
if (vnc_display_setup_auth(&vd->auth, &vd->subauth,
vd->tlscreds, password,
sasl, false, errp) < 0) {
goto fail;
}
if (vnc_display_setup_auth(&vd->ws_auth, &vd->ws_subauth,
vd->tlscreds, password,
sasl, true, errp) < 0) {
goto fail;
}

1
ui/vnc.h
View File

@ -172,6 +172,7 @@ struct VncDisplay
int auth;
int subauth; /* Used by VeNCrypt */
int ws_auth; /* Used by websockets */
int ws_subauth; /* Used by websockets */
bool lossy;
bool non_adaptive;
QCryptoTLSCreds *tlscreds;