int vnc_tls_client_setup(struct VncState *vs,
int needX509Creds) {
VNC_DEBUG("Do TLS setup\n");
if (vnc_tls_initialize() < 0) {
VNC_DEBUG("Failed to init TLS\n");
vnc_client_error(vs);
return -1;
}
if (vs->tls.session == NULL) {
if (gnutls_init(&vs->tls.session, GNUTLS_SERVER) < 0) {
vnc_client_error(vs);
return -1;
}
if (gnutls_set_default_priority(vs->tls.session) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (vnc_set_gnutls_priority(vs->tls.session, needX509Creds) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (needX509Creds) {
gnutls_certificate_server_credentials x509_cred = vnc_tls_initialize_x509_cred(vs->vd);
if (!x509_cred) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (gnutls_credentials_set(vs->tls.session, GNUTLS_CRD_CERTIFICATE, x509_cred) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
gnutls_certificate_free_credentials(x509_cred);
vnc_client_error(vs);
return -1;
}
if (vs->vd->tls.x509verify) {
VNC_DEBUG("Requesting a client certificate\n");
gnutls_certificate_server_set_request (vs->tls.session, GNUTLS_CERT_REQUEST);
}
} else {
gnutls_anon_server_credentials_t anon_cred = vnc_tls_initialize_anon_cred();
if (!anon_cred) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (gnutls_credentials_set(vs->tls.session, GNUTLS_CRD_ANON, anon_cred) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
gnutls_anon_free_server_credentials(anon_cred);
vnc_client_error(vs);
return -1;
}
}
gnutls_transport_set_ptr(vs->tls.session, (gnutls_transport_ptr_t)vs);
gnutls_transport_set_push_function(vs->tls.session, vnc_tls_push);
gnutls_transport_set_pull_function(vs->tls.session, vnc_tls_pull);
}
return 0;
}
int vnc_tls_client_setup(struct VncState *vs,
int needX509Creds) {
static const int cert_type_priority[] = { GNUTLS_CRT_X509, 0 };
static const int protocol_priority[]= { GNUTLS_TLS1_1, GNUTLS_TLS1_0, GNUTLS_SSL3, 0 };
static const int kx_anon[] = {GNUTLS_KX_ANON_DH, 0};
static const int kx_x509[] = {GNUTLS_KX_DHE_DSS, GNUTLS_KX_RSA, GNUTLS_KX_DHE_RSA, GNUTLS_KX_SRP, 0};
VNC_DEBUG("Do TLS setup\n");
if (vnc_tls_initialize() < 0) {
VNC_DEBUG("Failed to init TLS\n");
vnc_client_error(vs);
return -1;
}
if (vs->tls.session == NULL) {
if (gnutls_init(&vs->tls.session, GNUTLS_SERVER) < 0) {
vnc_client_error(vs);
return -1;
}
if (gnutls_set_default_priority(vs->tls.session) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (gnutls_kx_set_priority(vs->tls.session, needX509Creds ? kx_x509 : kx_anon) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (gnutls_certificate_type_set_priority(vs->tls.session, cert_type_priority) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (gnutls_protocol_set_priority(vs->tls.session, protocol_priority) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (needX509Creds) {
gnutls_certificate_server_credentials x509_cred = vnc_tls_initialize_x509_cred(vs->vd);
if (!x509_cred) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (gnutls_credentials_set(vs->tls.session, GNUTLS_CRD_CERTIFICATE, x509_cred) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
gnutls_certificate_free_credentials(x509_cred);
vnc_client_error(vs);
return -1;
}
if (vs->vd->tls.x509verify) {
VNC_DEBUG("Requesting a client certificate\n");
gnutls_certificate_server_set_request (vs->tls.session, GNUTLS_CERT_REQUEST);
}
} else {
gnutls_anon_server_credentials anon_cred = vnc_tls_initialize_anon_cred();
if (!anon_cred) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
vnc_client_error(vs);
return -1;
}
if (gnutls_credentials_set(vs->tls.session, GNUTLS_CRD_ANON, anon_cred) < 0) {
gnutls_deinit(vs->tls.session);
vs->tls.session = NULL;
gnutls_anon_free_server_credentials(anon_cred);
vnc_client_error(vs);
return -1;
}
}
gnutls_transport_set_ptr(vs->tls.session, (gnutls_transport_ptr_t)vs);
gnutls_transport_set_push_function(vs->tls.session, vnc_tls_push);
gnutls_transport_set_pull_function(vs->tls.session, vnc_tls_pull);
}
return 0;
}
