dcavalca / rpms / qemu

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Index: qemu-kvm-0.10/qemu/Makefile
===================================================================
--- qemu-kvm-0.10.orig/qemu/Makefile
+++ qemu-kvm-0.10/qemu/Makefile
@@ -149,6 +149,9 @@ ifdef CONFIG_CURSES
 OBJS+=curses.o
 endif
 OBJS+=vnc.o d3des.o
+ifdef CONFIG_VNC_TLS
+OBJS+=vnc-tls.o vnc-auth-vencrypt.o
+endif
 
 ifdef CONFIG_COCOA
 OBJS+=cocoa.o
@@ -172,10 +175,16 @@ sdl.o: sdl.c keymaps.h sdl_keysym.h
 
 sdl.o audio/sdlaudio.o: CFLAGS += $(SDL_CFLAGS)
 
-vnc.o: vnc.c keymaps.h sdl_keysym.h vnchextile.h d3des.c d3des.h
+vnc.h: vnc-tls.h vnc-auth-vencrypt.h keymaps.h
+
+vnc.o: vnc.c vnc.h vnc_keysym.h vnchextile.h d3des.c d3des.h
 
 vnc.o: CFLAGS += $(CONFIG_VNC_TLS_CFLAGS)
 
+vnc-tls.o: vnc-tls.c vnc.h
+
+vnc-auth-vencrypt.o: vnc-auth-vencrypt.c vnc.h
+
 curses.o: curses.c keymaps.h curses_keys.h
 
 bt-host.o: CFLAGS += $(CONFIG_BLUEZ_CFLAGS)
Index: qemu-kvm-0.10/qemu/vnc-auth-vencrypt.c
===================================================================
--- /dev/null
+++ qemu-kvm-0.10/qemu/vnc-auth-vencrypt.c
@@ -0,0 +1,167 @@
+/*
+ * QEMU VNC display driver: VeNCrypt authentication setup
+ *
+ * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
+ * Copyright (C) 2006 Fabrice Bellard
+ * Copyright (C) 2009 Red Hat, Inc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "vnc.h"
+
+
+static void start_auth_vencrypt_subauth(VncState *vs)
+{
+    switch (vs->vd->subauth) {
+    case VNC_AUTH_VENCRYPT_TLSNONE:
+    case VNC_AUTH_VENCRYPT_X509NONE:
+       VNC_DEBUG("Accept TLS auth none\n");
+       vnc_write_u32(vs, 0); /* Accept auth completion */
+       start_client_init(vs);
+       break;
+
+    case VNC_AUTH_VENCRYPT_TLSVNC:
+    case VNC_AUTH_VENCRYPT_X509VNC:
+       VNC_DEBUG("Start TLS auth VNC\n");
+       start_auth_vnc(vs);
+       break;
+
+    default: /* Should not be possible, but just in case */
+       VNC_DEBUG("Reject auth %d\n", vs->vd->auth);
+       vnc_write_u8(vs, 1);
+       if (vs->minor >= 8) {
+           static const char err[] = "Unsupported authentication type";
+           vnc_write_u32(vs, sizeof(err));
+           vnc_write(vs, err, sizeof(err));
+       }
+       vnc_client_error(vs);
+    }
+}
+
+static void vnc_tls_handshake_io(void *opaque);
+
+static int vnc_start_vencrypt_handshake(struct VncState *vs) {
+    int ret;
+
+    if ((ret = gnutls_handshake(vs->tls.session)) < 0) {
+       if (!gnutls_error_is_fatal(ret)) {
+           VNC_DEBUG("Handshake interrupted (blocking)\n");
+           if (!gnutls_record_get_direction(vs->tls.session))
+               qemu_set_fd_handler(vs->csock, vnc_tls_handshake_io, NULL, vs);
+           else
+               qemu_set_fd_handler(vs->csock, NULL, vnc_tls_handshake_io, vs);
+           return 0;
+       }
+       VNC_DEBUG("Handshake failed %s\n", gnutls_strerror(ret));
+       vnc_client_error(vs);
+       return -1;
+    }
+
+    if (vs->vd->tls.x509verify) {
+	if (vnc_tls_validate_certificate(vs) < 0) {
+	    VNC_DEBUG("Client verification failed\n");
+	    vnc_client_error(vs);
+	    return -1;
+	} else {
+	    VNC_DEBUG("Client verification passed\n");
+	}
+    }
+
+    VNC_DEBUG("Handshake done, switching to TLS data mode\n");
+    vs->tls.wiremode = VNC_WIREMODE_TLS;
+    qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
+
+    start_auth_vencrypt_subauth(vs);
+
+    return 0;
+}
+
+static void vnc_tls_handshake_io(void *opaque) {
+    struct VncState *vs = (struct VncState *)opaque;
+
+    VNC_DEBUG("Handshake IO continue\n");
+    vnc_start_vencrypt_handshake(vs);
+}
+
+
+
+#define NEED_X509_AUTH(vs)			      \
+    ((vs)->vd->subauth == VNC_AUTH_VENCRYPT_X509NONE ||   \
+     (vs)->vd->subauth == VNC_AUTH_VENCRYPT_X509VNC ||    \
+     (vs)->vd->subauth == VNC_AUTH_VENCRYPT_X509PLAIN)
+
+
+static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len)
+{
+    int auth = read_u32(data, 0);
+
+    if (auth != vs->vd->subauth) {
+	VNC_DEBUG("Rejecting auth %d\n", auth);
+	vnc_write_u8(vs, 0); /* Reject auth */
+	vnc_flush(vs);
+	vnc_client_error(vs);
+    } else {
+	VNC_DEBUG("Accepting auth %d, setting up TLS for handshake\n", auth);
+	vnc_write_u8(vs, 1); /* Accept auth */
+	vnc_flush(vs);
+
+	if (vnc_tls_client_setup(vs, NEED_X509_AUTH(vs)) < 0) {
+	    VNC_DEBUG("Failed to setup TLS\n");
+	    return 0;
+	}
+
+	VNC_DEBUG("Start TLS VeNCrypt handshake process\n");
+	if (vnc_start_vencrypt_handshake(vs) < 0) {
+	    VNC_DEBUG("Failed to start TLS handshake\n");
+	    return 0;
+	}
+    }
+    return 0;
+}
+
+static int protocol_client_vencrypt_init(VncState *vs, uint8_t *data, size_t len)
+{
+    if (data[0] != 0 ||
+	data[1] != 2) {
+	VNC_DEBUG("Unsupported VeNCrypt protocol %d.%d\n", (int)data[0], (int)data[1]);
+	vnc_write_u8(vs, 1); /* Reject version */
+	vnc_flush(vs);
+	vnc_client_error(vs);
+    } else {
+	VNC_DEBUG("Sending allowed auth %d\n", vs->vd->subauth);
+	vnc_write_u8(vs, 0); /* Accept version */
+	vnc_write_u8(vs, 1); /* Number of sub-auths */
+	vnc_write_u32(vs, vs->vd->subauth); /* The supported auth */
+	vnc_flush(vs);
+	vnc_read_when(vs, protocol_client_vencrypt_auth, 4);
+    }
+    return 0;
+}
+
+
+void start_auth_vencrypt(VncState *vs)
+{
+    /* Send VeNCrypt version 0.2 */
+    vnc_write_u8(vs, 0);
+    vnc_write_u8(vs, 2);
+
+    vnc_read_when(vs, protocol_client_vencrypt_init, 2);
+}
+
Index: qemu-kvm-0.10/qemu/vnc-auth-vencrypt.h
===================================================================
--- /dev/null
+++ qemu-kvm-0.10/qemu/vnc-auth-vencrypt.h
@@ -0,0 +1,33 @@
+/*
+ * QEMU VNC display driver
+ *
+ * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
+ * Copyright (C) 2006 Fabrice Bellard
+ * Copyright (C) 2009 Red Hat, Inc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#ifndef __QEMU_VNC_AUTH_VENCRYPT_H__
+#define __QEMU_VNC_AUTH_VENCRYPT_H__
+
+void start_auth_vencrypt(VncState *vs);
+
+#endif /* __QEMU_VNC_AUTH_VENCRYPT_H__ */
Index: qemu-kvm-0.10/qemu/vnc-tls.c
===================================================================
--- /dev/null
+++ qemu-kvm-0.10/qemu/vnc-tls.c
@@ -0,0 +1,414 @@
+/*
+ * QEMU VNC display driver: TLS helpers
+ *
+ * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
+ * Copyright (C) 2006 Fabrice Bellard
+ * Copyright (C) 2009 Red Hat, Inc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "vnc.h"
+#include "qemu_socket.h"
+
+#if defined(_VNC_DEBUG) && _VNC_DEBUG >= 2
+/* Very verbose, so only enabled for _VNC_DEBUG >= 2 */
+static void vnc_debug_gnutls_log(int level, const char* str) {
+    VNC_DEBUG("%d %s", level, str);
+}
+#endif /* defined(_VNC_DEBUG) && _VNC_DEBUG >= 2 */
+
+
+#define DH_BITS 1024
+static gnutls_dh_params_t dh_params;
+
+static int vnc_tls_initialize(void)
+{
+    static int tlsinitialized = 0;
+
+    if (tlsinitialized)
+	return 1;
+
+    if (gnutls_global_init () < 0)
+	return 0;
+
+    /* XXX ought to re-generate diffie-hellmen params periodically */
+    if (gnutls_dh_params_init (&dh_params) < 0)
+	return 0;
+    if (gnutls_dh_params_generate2 (dh_params, DH_BITS) < 0)
+	return 0;
+
+#if defined(_VNC_DEBUG) && _VNC_DEBUG >= 2
+    gnutls_global_set_log_level(10);
+    gnutls_global_set_log_function(vnc_debug_gnutls_log);
+#endif
+
+    tlsinitialized = 1;
+
+    return 1;
+}
+
+static ssize_t vnc_tls_push(gnutls_transport_ptr_t transport,
+			    const void *data,
+			    size_t len) {
+    struct VncState *vs = (struct VncState *)transport;
+    int ret;
+
+ retry:
+    ret = send(vs->csock, data, len, 0);
+    if (ret < 0) {
+	if (errno == EINTR)
+	    goto retry;
+	return -1;
+    }
+    return ret;
+}
+
+
+static ssize_t vnc_tls_pull(gnutls_transport_ptr_t transport,
+			    void *data,
+			    size_t len) {
+    struct VncState *vs = (struct VncState *)transport;
+    int ret;
+
+ retry:
+    ret = recv(vs->csock, data, len, 0);
+    if (ret < 0) {
+	if (errno == EINTR)
+	    goto retry;
+	return -1;
+    }
+    return ret;
+}
+
+
+static gnutls_anon_server_credentials vnc_tls_initialize_anon_cred(void)
+{
+    gnutls_anon_server_credentials anon_cred;
+    int ret;
+
+    if ((ret = gnutls_anon_allocate_server_credentials(&anon_cred)) < 0) {
+	VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
+	return NULL;
+    }
+
+    gnutls_anon_set_server_dh_params(anon_cred, dh_params);
+
+    return anon_cred;
+}
+
+
+static gnutls_certificate_credentials_t vnc_tls_initialize_x509_cred(VncDisplay *vd)
+{
+    gnutls_certificate_credentials_t x509_cred;
+    int ret;
+
+    if (!vd->tls.x509cacert) {
+	VNC_DEBUG("No CA x509 certificate specified\n");
+	return NULL;
+    }
+    if (!vd->tls.x509cert) {
+	VNC_DEBUG("No server x509 certificate specified\n");
+	return NULL;
+    }
+    if (!vd->tls.x509key) {
+	VNC_DEBUG("No server private key specified\n");
+	return NULL;
+    }
+
+    if ((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0) {
+	VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
+	return NULL;
+    }
+    if ((ret = gnutls_certificate_set_x509_trust_file(x509_cred,
+						      vd->tls.x509cacert,
+						      GNUTLS_X509_FMT_PEM)) < 0) {
+	VNC_DEBUG("Cannot load CA certificate %s\n", gnutls_strerror(ret));
+	gnutls_certificate_free_credentials(x509_cred);
+	return NULL;
+    }
+
+    if ((ret = gnutls_certificate_set_x509_key_file (x509_cred,
+						     vd->tls.x509cert,
+						     vd->tls.x509key,
+						     GNUTLS_X509_FMT_PEM)) < 0) {
+	VNC_DEBUG("Cannot load certificate & key %s\n", gnutls_strerror(ret));
+	gnutls_certificate_free_credentials(x509_cred);
+	return NULL;
+    }
+
+    if (vd->tls.x509cacrl) {
+	if ((ret = gnutls_certificate_set_x509_crl_file(x509_cred,
+							vd->tls.x509cacrl,
+							GNUTLS_X509_FMT_PEM)) < 0) {
+	    VNC_DEBUG("Cannot load CRL %s\n", gnutls_strerror(ret));
+	    gnutls_certificate_free_credentials(x509_cred);
+	    return NULL;
+	}
+    }
+
+    gnutls_certificate_set_dh_params (x509_cred, dh_params);
+
+    return x509_cred;
+}
+
+
+int vnc_tls_validate_certificate(struct VncState *vs)
+{
+    int ret;
+    unsigned int status;
+    const gnutls_datum_t *certs;
+    unsigned int nCerts, i;
+    time_t now;
+
+    VNC_DEBUG("Validating client certificate\n");
+    if ((ret = gnutls_certificate_verify_peers2 (vs->tls.session, &status)) < 0) {
+	VNC_DEBUG("Verify failed %s\n", gnutls_strerror(ret));
+	return -1;
+    }
+
+    if ((now = time(NULL)) == ((time_t)-1)) {
+	return -1;
+    }
+
+    if (status != 0) {
+	if (status & GNUTLS_CERT_INVALID)
+	    VNC_DEBUG("The certificate is not trusted.\n");
+
+	if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
+	    VNC_DEBUG("The certificate hasn't got a known issuer.\n");
+
+	if (status & GNUTLS_CERT_REVOKED)
+	    VNC_DEBUG("The certificate has been revoked.\n");
+
+	if (status & GNUTLS_CERT_INSECURE_ALGORITHM)
+	    VNC_DEBUG("The certificate uses an insecure algorithm\n");
+
+	return -1;
+    } else {
+	VNC_DEBUG("Certificate is valid!\n");
+    }
+
+    /* Only support x509 for now */
+    if (gnutls_certificate_type_get(vs->tls.session) != GNUTLS_CRT_X509)
+	return -1;
+
+    if (!(certs = gnutls_certificate_get_peers(vs->tls.session, &nCerts)))
+	return -1;
+
+    for (i = 0 ; i < nCerts ; i++) {
+	gnutls_x509_crt_t cert;
+	VNC_DEBUG ("Checking certificate chain %d\n", i);
+	if (gnutls_x509_crt_init (&cert) < 0)
+	    return -1;
+
+	if (gnutls_x509_crt_import(cert, &certs[i], GNUTLS_X509_FMT_DER) < 0) {
+	    gnutls_x509_crt_deinit (cert);
+	    return -1;
+	}
+
+	if (gnutls_x509_crt_get_expiration_time (cert) < now) {
+	    VNC_DEBUG("The certificate has expired\n");
+	    gnutls_x509_crt_deinit (cert);
+	    return -1;
+	}
+
+	if (gnutls_x509_crt_get_activation_time (cert) > now) {
+	    VNC_DEBUG("The certificate is not yet activated\n");
+	    gnutls_x509_crt_deinit (cert);
+	    return -1;
+	}
+
+	if (gnutls_x509_crt_get_activation_time (cert) > now) {
+	    VNC_DEBUG("The certificate is not yet activated\n");
+	    gnutls_x509_crt_deinit (cert);
+	    return -1;
+	}
+
+	gnutls_x509_crt_deinit (cert);
+    }
+
+    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;
+}
+
+
+void vnc_tls_client_cleanup(struct VncState *vs)
+{
+    if (vs->tls.session) {
+	gnutls_deinit(vs->tls.session);
+	vs->tls.session = NULL;
+    }
+    vs->tls.wiremode = VNC_WIREMODE_CLEAR;
+}
+
+
+
+static int vnc_set_x509_credential(VncDisplay *vd,
+				   const char *certdir,
+				   const char *filename,
+				   char **cred,
+				   int ignoreMissing)
+{
+    struct stat sb;
+
+    if (*cred) {
+	qemu_free(*cred);
+	*cred = NULL;
+    }
+
+    *cred = qemu_malloc(strlen(certdir) + strlen(filename) + 2);
+
+    strcpy(*cred, certdir);
+    strcat(*cred, "/");
+    strcat(*cred, filename);
+
+    VNC_DEBUG("Check %s\n", *cred);
+    if (stat(*cred, &sb) < 0) {
+	qemu_free(*cred);
+	*cred = NULL;
+	if (ignoreMissing && errno == ENOENT)
+	    return 0;
+	return -1;
+    }
+
+    return 0;
+}
+
+
+#define X509_CA_CERT_FILE "ca-cert.pem"
+#define X509_CA_CRL_FILE "ca-crl.pem"
+#define X509_SERVER_KEY_FILE "server-key.pem"
+#define X509_SERVER_CERT_FILE "server-cert.pem"
+
+
+int vnc_tls_set_x509_creds_dir(VncDisplay *vd,
+			       const char *certdir)
+{
+    if (vnc_set_x509_credential(vd, certdir, X509_CA_CERT_FILE, &vd->tls.x509cacert, 0) < 0)
+	goto cleanup;
+    if (vnc_set_x509_credential(vd, certdir, X509_CA_CRL_FILE, &vd->tls.x509cacrl, 1) < 0)
+	goto cleanup;
+    if (vnc_set_x509_credential(vd, certdir, X509_SERVER_CERT_FILE, &vd->tls.x509cert, 0) < 0)
+	goto cleanup;
+    if (vnc_set_x509_credential(vd, certdir, X509_SERVER_KEY_FILE, &vd->tls.x509key, 0) < 0)
+	goto cleanup;
+
+    return 0;
+
+ cleanup:
+    qemu_free(vd->tls.x509cacert);
+    qemu_free(vd->tls.x509cacrl);
+    qemu_free(vd->tls.x509cert);
+    qemu_free(vd->tls.x509key);
+    vd->tls.x509cacert = vd->tls.x509cacrl = vd->tls.x509cert = vd->tls.x509key = NULL;
+    return -1;
+}
+
Index: qemu-kvm-0.10/qemu/vnc-tls.h
===================================================================
--- /dev/null
+++ qemu-kvm-0.10/qemu/vnc-tls.h
@@ -0,0 +1,70 @@
+/*
+ * QEMU VNC display driver. TLS helpers
+ *
+ * Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>
+ * Copyright (C) 2006 Fabrice Bellard
+ * Copyright (C) 2009 Red Hat, Inc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#ifndef __QEMU_VNC_TLS_H__
+#define __QEMU_VNC_TLS_H__
+
+#include <gnutls/gnutls.h>
+#include <gnutls/x509.h>
+
+enum {
+    VNC_WIREMODE_CLEAR,
+    VNC_WIREMODE_TLS,
+};
+
+typedef struct VncDisplayTLS VncDisplayTLS;
+typedef struct VncStateTLS VncStateTLS;
+
+/* Server state */
+struct VncDisplayTLS {
+    int x509verify; /* Non-zero if server requests & validates client cert */
+
+    /* Paths to x509 certs/keys */
+    char *x509cacert;
+    char *x509cacrl;
+    char *x509cert;
+    char *x509key;
+};
+
+/* Per client state */
+struct VncStateTLS {
+    /* Whether data is being TLS encrypted yet */
+    int wiremode;
+    gnutls_session_t session;
+};
+
+int vnc_tls_client_setup(VncState *vs, int x509Creds);
+void vnc_tls_client_cleanup(VncState *vs);
+
+int vnc_tls_validate_certificate(VncState *vs);
+
+int vnc_tls_set_x509_creds_dir(VncDisplay *vd,
+			       const char *path);
+
+
+#endif /* __QEMU_VNC_TLS_H__ */
+
Index: qemu-kvm-0.10/qemu/vnc.c
===================================================================
--- qemu-kvm-0.10.orig/qemu/vnc.c
+++ qemu-kvm-0.10/qemu/vnc.c
@@ -34,21 +34,6 @@
 #include "vnc_keysym.h"
 #include "d3des.h"
 
-// #define _VNC_DEBUG 1
-
-#ifdef _VNC_DEBUG
-#define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
-
-#if defined(CONFIG_VNC_TLS) && _VNC_DEBUG >= 2
-/* Very verbose, so only enabled for _VNC_DEBUG >= 2 */
-static void vnc_debug_gnutls_log(int level, const char* str) {
-    VNC_DEBUG("%d %s", level, str);
-}
-#endif /* CONFIG_VNC_TLS && _VNC_DEBUG */
-#else
-#define VNC_DEBUG(fmt, ...) do { } while (0)
-#endif
-
 #define count_bits(c, v) { \
     for (c = 0; v; v >>= 1) \
     { \
@@ -204,14 +189,7 @@ static inline uint32_t vnc_has_feature(V
    3) resolutions > 1024
 */
 
-static void vnc_write(VncState *vs, const void *data, size_t len);
-static void vnc_write_u32(VncState *vs, uint32_t value);
-static void vnc_write_s32(VncState *vs, int32_t value);
-static void vnc_write_u16(VncState *vs, uint16_t value);
-static void vnc_write_u8(VncState *vs, uint8_t value);
-static void vnc_flush(VncState *vs);
 static void vnc_update_client(void *opaque);
-static void vnc_client_read(void *opaque);
 
 static void vnc_colordepth(VncState *vs);
 
@@ -867,10 +845,7 @@ static int vnc_client_io_error(VncState 
         if (vs->input.buffer) qemu_free(vs->input.buffer);
         if (vs->output.buffer) qemu_free(vs->output.buffer);
 #ifdef CONFIG_VNC_TLS
-	if (vs->tls_session) {
-	    gnutls_deinit(vs->tls_session);
-	    vs->tls_session = NULL;
-	}
+	vnc_tls_client_cleanup(vs);
 #endif /* CONFIG_VNC_TLS */
         audio_del(vs);
 
@@ -896,19 +871,20 @@ static int vnc_client_io_error(VncState 
     return ret;
 }
 
-static void vnc_client_error(VncState *vs)
+
+void vnc_client_error(VncState *vs)
 {
     vnc_client_io_error(vs, -1, EINVAL);
 }
 
-static void vnc_client_write(void *opaque)
+void vnc_client_write(void *opaque)
 {
     long ret;
     VncState *vs = opaque;
 
 #ifdef CONFIG_VNC_TLS
-    if (vs->tls_session) {
-	ret = gnutls_write(vs->tls_session, vs->output.buffer, vs->output.offset);
+    if (vs->tls.session) {
+	ret = gnutls_write(vs->tls.session, vs->output.buffer, vs->output.offset);
 	if (ret < 0) {
 	    if (ret == GNUTLS_E_AGAIN)
 		errno = EAGAIN;
@@ -931,13 +907,13 @@ static void vnc_client_write(void *opaqu
     }
 }
 
-static void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
+void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting)
 {
     vs->read_handler = func;
     vs->read_handler_expect = expecting;
 }
 
-static void vnc_client_read(void *opaque)
+void vnc_client_read(void *opaque)
 {
     VncState *vs = opaque;
     long ret;
@@ -945,8 +921,8 @@ static void vnc_client_read(void *opaque
     buffer_reserve(&vs->input, 4096);
 
 #ifdef CONFIG_VNC_TLS
-    if (vs->tls_session) {
-	ret = gnutls_read(vs->tls_session, buffer_end(&vs->input), 4096);
+    if (vs->tls.session) {
+	ret = gnutls_read(vs->tls.session, buffer_end(&vs->input), 4096);
 	if (ret < 0) {
 	    if (ret == GNUTLS_E_AGAIN)
 		errno = EAGAIN;
@@ -980,7 +956,7 @@ static void vnc_client_read(void *opaque
     }
 }
 
-static void vnc_write(VncState *vs, const void *data, size_t len)
+void vnc_write(VncState *vs, const void *data, size_t len)
 {
     buffer_reserve(&vs->output, len);
 
@@ -991,12 +967,12 @@ static void vnc_write(VncState *vs, cons
     buffer_append(&vs->output, data, len);
 }
 
-static void vnc_write_s32(VncState *vs, int32_t value)
+void vnc_write_s32(VncState *vs, int32_t value)
 {
     vnc_write_u32(vs, *(uint32_t *)&value);
 }
 
-static void vnc_write_u32(VncState *vs, uint32_t value)
+void vnc_write_u32(VncState *vs, uint32_t value)
 {
     uint8_t buf[4];
 
@@ -1008,7 +984,7 @@ static void vnc_write_u32(VncState *vs, 
     vnc_write(vs, buf, 4);
 }
 
-static void vnc_write_u16(VncState *vs, uint16_t value)
+void vnc_write_u16(VncState *vs, uint16_t value)
 {
     uint8_t buf[2];
 
@@ -1018,74 +994,39 @@ static void vnc_write_u16(VncState *vs, 
     vnc_write(vs, buf, 2);
 }
 
-static void vnc_write_u8(VncState *vs, uint8_t value)
+void vnc_write_u8(VncState *vs, uint8_t value)
 {
     vnc_write(vs, (char *)&value, 1);
 }
 
-static void vnc_flush(VncState *vs)
+void vnc_flush(VncState *vs)
 {
     if (vs->output.offset)
 	vnc_client_write(vs);
 }
 
-static uint8_t read_u8(uint8_t *data, size_t offset)
+uint8_t read_u8(uint8_t *data, size_t offset)
 {
     return data[offset];
 }
 
-static uint16_t read_u16(uint8_t *data, size_t offset)
+uint16_t read_u16(uint8_t *data, size_t offset)
 {
     return ((data[offset] & 0xFF) << 8) | (data[offset + 1] & 0xFF);
 }
 
-static int32_t read_s32(uint8_t *data, size_t offset)
+int32_t read_s32(uint8_t *data, size_t offset)
 {
     return (int32_t)((data[offset] << 24) | (data[offset + 1] << 16) |
 		     (data[offset + 2] << 8) | data[offset + 3]);
 }
 
-static uint32_t read_u32(uint8_t *data, size_t offset)
+uint32_t read_u32(uint8_t *data, size_t offset)
 {
     return ((data[offset] << 24) | (data[offset + 1] << 16) |
 	    (data[offset + 2] << 8) | data[offset + 3]);
 }
 
-#ifdef CONFIG_VNC_TLS
-static ssize_t vnc_tls_push(gnutls_transport_ptr_t transport,
-                            const void *data,
-                            size_t len) {
-    struct VncState *vs = (struct VncState *)transport;
-    int ret;
-
- retry:
-    ret = send(vs->csock, data, len, 0);
-    if (ret < 0) {
-	if (errno == EINTR)
-	    goto retry;
-	return -1;
-    }
-    return ret;
-}
-
-
-static ssize_t vnc_tls_pull(gnutls_transport_ptr_t transport,
-                            void *data,
-                            size_t len) {
-    struct VncState *vs = (struct VncState *)transport;
-    int ret;
-
- retry:
-    ret = recv(vs->csock, data, len, 0);
-    if (ret < 0) {
-	if (errno == EINTR)
-	    goto retry;
-	return -1;
-    }
-    return ret;
-}
-#endif /* CONFIG_VNC_TLS */
-
 static void client_cut_text(VncState *vs, size_t len, uint8_t *text)
 {
 }
@@ -1668,6 +1609,11 @@ static int protocol_client_init(VncState
     return 0;
 }
 
+void start_client_init(VncState *vs)
+{
+    vnc_read_when(vs, protocol_client_init, 1);
+}
+
 static void make_challenge(VncState *vs)
 {
     int i;
@@ -1723,12 +1669,12 @@ static int protocol_client_auth_vnc(VncS
 	vnc_write_u32(vs, 0); /* Accept auth */
 	vnc_flush(vs);
 
-	vnc_read_when(vs, protocol_client_init, 1);
+        start_client_init(vs);
     }
     return 0;
 }
 
-static int start_auth_vnc(VncState *vs)
+void start_auth_vnc(VncState *vs)
 {
     make_challenge(vs);
     /* Send client a 'random' challenge */
@@ -1736,411 +1682,9 @@ static int start_auth_vnc(VncState *vs)
     vnc_flush(vs);
 
     vnc_read_when(vs, protocol_client_auth_vnc, sizeof(vs->challenge));
-    return 0;
-}
-
-
-#ifdef CONFIG_VNC_TLS
-#define DH_BITS 1024
-static gnutls_dh_params_t dh_params;
-
-static int vnc_tls_initialize(void)
-{
-    static int tlsinitialized = 0;
-
-    if (tlsinitialized)
-	return 1;
-
-    if (gnutls_global_init () < 0)
-	return 0;
-
-    /* XXX ought to re-generate diffie-hellmen params periodically */
-    if (gnutls_dh_params_init (&dh_params) < 0)
-	return 0;
-    if (gnutls_dh_params_generate2 (dh_params, DH_BITS) < 0)
-	return 0;
-
-#if defined(_VNC_DEBUG) && _VNC_DEBUG >= 2
-    gnutls_global_set_log_level(10);
-    gnutls_global_set_log_function(vnc_debug_gnutls_log);
-#endif
-
-    tlsinitialized = 1;
-
-    return 1;
-}
-
-static gnutls_anon_server_credentials vnc_tls_initialize_anon_cred(void)
-{
-    gnutls_anon_server_credentials anon_cred;
-    int ret;
-
-    if ((ret = gnutls_anon_allocate_server_credentials(&anon_cred)) < 0) {
-	VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
-	return NULL;
-    }
-
-    gnutls_anon_set_server_dh_params(anon_cred, dh_params);
-
-    return anon_cred;
 }
 
 
-static gnutls_certificate_credentials_t vnc_tls_initialize_x509_cred(VncState *vs)
-{
-    gnutls_certificate_credentials_t x509_cred;
-    int ret;
-
-    if (!vs->vd->x509cacert) {
-	VNC_DEBUG("No CA x509 certificate specified\n");
-	return NULL;
-    }
-    if (!vs->vd->x509cert) {
-	VNC_DEBUG("No server x509 certificate specified\n");
-	return NULL;
-    }
-    if (!vs->vd->x509key) {
-	VNC_DEBUG("No server private key specified\n");
-	return NULL;
-    }
-
-    if ((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0) {
-	VNC_DEBUG("Cannot allocate credentials %s\n", gnutls_strerror(ret));
-	return NULL;
-    }
-    if ((ret = gnutls_certificate_set_x509_trust_file(x509_cred,
-						      vs->vd->x509cacert,
-						      GNUTLS_X509_FMT_PEM)) < 0) {
-	VNC_DEBUG("Cannot load CA certificate %s\n", gnutls_strerror(ret));
-	gnutls_certificate_free_credentials(x509_cred);
-	return NULL;
-    }
-
-    if ((ret = gnutls_certificate_set_x509_key_file (x509_cred,
-						     vs->vd->x509cert,
-						     vs->vd->x509key,
-						     GNUTLS_X509_FMT_PEM)) < 0) {
-	VNC_DEBUG("Cannot load certificate & key %s\n", gnutls_strerror(ret));
-	gnutls_certificate_free_credentials(x509_cred);
-	return NULL;
-    }
-
-    if (vs->vd->x509cacrl) {
-	if ((ret = gnutls_certificate_set_x509_crl_file(x509_cred,
-							vs->vd->x509cacrl,
-							GNUTLS_X509_FMT_PEM)) < 0) {
-	    VNC_DEBUG("Cannot load CRL %s\n", gnutls_strerror(ret));
-	    gnutls_certificate_free_credentials(x509_cred);
-	    return NULL;
-	}
-    }
-
-    gnutls_certificate_set_dh_params (x509_cred, dh_params);
-
-    return x509_cred;
-}
-
-static int vnc_validate_certificate(struct VncState *vs)
-{
-    int ret;
-    unsigned int status;
-    const gnutls_datum_t *certs;
-    unsigned int nCerts, i;
-    time_t now;
-
-    VNC_DEBUG("Validating client certificate\n");
-    if ((ret = gnutls_certificate_verify_peers2 (vs->tls_session, &status)) < 0) {
-	VNC_DEBUG("Verify failed %s\n", gnutls_strerror(ret));
-	return -1;
-    }
-
-    if ((now = time(NULL)) == ((time_t)-1)) {
-	return -1;
-    }
-
-    if (status != 0) {
-	if (status & GNUTLS_CERT_INVALID)
-	    VNC_DEBUG("The certificate is not trusted.\n");
-
-	if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
-	    VNC_DEBUG("The certificate hasn't got a known issuer.\n");
-
-	if (status & GNUTLS_CERT_REVOKED)
-	    VNC_DEBUG("The certificate has been revoked.\n");
-
-	if (status & GNUTLS_CERT_INSECURE_ALGORITHM)
-	    VNC_DEBUG("The certificate uses an insecure algorithm\n");
-
-	return -1;
-    } else {
-	VNC_DEBUG("Certificate is valid!\n");
-    }
-
-    /* Only support x509 for now */
-    if (gnutls_certificate_type_get(vs->tls_session) != GNUTLS_CRT_X509)
-	return -1;
-
-    if (!(certs = gnutls_certificate_get_peers(vs->tls_session, &nCerts)))
-	return -1;
-
-    for (i = 0 ; i < nCerts ; i++) {
-	gnutls_x509_crt_t cert;
-	VNC_DEBUG ("Checking certificate chain %d\n", i);
-	if (gnutls_x509_crt_init (&cert) < 0)
-	    return -1;
-
-	if (gnutls_x509_crt_import(cert, &certs[i], GNUTLS_X509_FMT_DER) < 0) {
-	    gnutls_x509_crt_deinit (cert);
-	    return -1;
-	}
-
-	if (gnutls_x509_crt_get_expiration_time (cert) < now) {
-	    VNC_DEBUG("The certificate has expired\n");
-	    gnutls_x509_crt_deinit (cert);
-	    return -1;
-	}
-
-	if (gnutls_x509_crt_get_activation_time (cert) > now) {
-	    VNC_DEBUG("The certificate is not yet activated\n");
-	    gnutls_x509_crt_deinit (cert);
-	    return -1;
-	}
-
-	if (gnutls_x509_crt_get_activation_time (cert) > now) {
-	    VNC_DEBUG("The certificate is not yet activated\n");
-	    gnutls_x509_crt_deinit (cert);
-	    return -1;
-	}
-
-	gnutls_x509_crt_deinit (cert);
-    }
-
-    return 0;
-}
-
-
-static int start_auth_vencrypt_subauth(VncState *vs)
-{
-    switch (vs->vd->subauth) {
-    case VNC_AUTH_VENCRYPT_TLSNONE:
-    case VNC_AUTH_VENCRYPT_X509NONE:
-       VNC_DEBUG("Accept TLS auth none\n");
-       vnc_write_u32(vs, 0); /* Accept auth completion */
-       vnc_read_when(vs, protocol_client_init, 1);
-       break;
-
-    case VNC_AUTH_VENCRYPT_TLSVNC:
-    case VNC_AUTH_VENCRYPT_X509VNC:
-       VNC_DEBUG("Start TLS auth VNC\n");
-       return start_auth_vnc(vs);
-
-    default: /* Should not be possible, but just in case */
-       VNC_DEBUG("Reject auth %d\n", vs->vd->auth);
-       vnc_write_u8(vs, 1);
-       if (vs->minor >= 8) {
-           static const char err[] = "Unsupported authentication type";
-           vnc_write_u32(vs, sizeof(err));
-           vnc_write(vs, err, sizeof(err));
-       }
-       vnc_client_error(vs);
-    }
-
-    return 0;
-}
-
-static void vnc_handshake_io(void *opaque);
-
-static int vnc_continue_handshake(struct VncState *vs) {
-    int ret;
-
-    if ((ret = gnutls_handshake(vs->tls_session)) < 0) {
-       if (!gnutls_error_is_fatal(ret)) {
-           VNC_DEBUG("Handshake interrupted (blocking)\n");
-           if (!gnutls_record_get_direction(vs->tls_session))
-               qemu_set_fd_handler(vs->csock, vnc_handshake_io, NULL, vs);
-           else
-               qemu_set_fd_handler(vs->csock, NULL, vnc_handshake_io, vs);
-           return 0;
-       }
-       VNC_DEBUG("Handshake failed %s\n", gnutls_strerror(ret));
-       vnc_client_error(vs);
-       return -1;
-    }
-
-    if (vs->vd->x509verify) {
-	if (vnc_validate_certificate(vs) < 0) {
-	    VNC_DEBUG("Client verification failed\n");
-	    vnc_client_error(vs);
-	    return -1;
-	} else {
-	    VNC_DEBUG("Client verification passed\n");
-	}
-    }
-
-    VNC_DEBUG("Handshake done, switching to TLS data mode\n");
-    vs->wiremode = VNC_WIREMODE_TLS;
-    qemu_set_fd_handler2(vs->csock, NULL, vnc_client_read, vnc_client_write, vs);
-
-    return start_auth_vencrypt_subauth(vs);
-}
-
-static void vnc_handshake_io(void *opaque) {
-    struct VncState *vs = (struct VncState *)opaque;
-
-    VNC_DEBUG("Handshake IO continue\n");
-    vnc_continue_handshake(vs);
-}
-
-#define NEED_X509_AUTH(vs)			      \
-    ((vs)->vd->subauth == VNC_AUTH_VENCRYPT_X509NONE ||   \
-     (vs)->vd->subauth == VNC_AUTH_VENCRYPT_X509VNC ||    \
-     (vs)->vd->subauth == VNC_AUTH_VENCRYPT_X509PLAIN)
-
-
-static int vnc_start_tls(struct VncState *vs) {
-    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, NEED_X509_AUTH(vs) ? 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 (NEED_X509_AUTH(vs)) {
-	    gnutls_certificate_server_credentials x509_cred = vnc_tls_initialize_x509_cred(vs);
-	    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->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);
-    }
-
-    VNC_DEBUG("Start TLS handshake process\n");
-    return vnc_continue_handshake(vs);
-}
-
-static int protocol_client_vencrypt_auth(VncState *vs, uint8_t *data, size_t len)
-{
-    int auth = read_u32(data, 0);
-
-    if (auth != vs->vd->subauth) {
-	VNC_DEBUG("Rejecting auth %d\n", auth);
-	vnc_write_u8(vs, 0); /* Reject auth */
-	vnc_flush(vs);
-	vnc_client_error(vs);
-    } else {
-	VNC_DEBUG("Accepting auth %d, starting handshake\n", auth);
-	vnc_write_u8(vs, 1); /* Accept auth */
-	vnc_flush(vs);
-
-	if (vnc_start_tls(vs) < 0) {
-	    VNC_DEBUG("Failed to complete TLS\n");
-	    return 0;
-	}
-    }
-    return 0;
-}
-
-static int protocol_client_vencrypt_init(VncState *vs, uint8_t *data, size_t len)
-{
-    if (data[0] != 0 ||
-	data[1] != 2) {
-	VNC_DEBUG("Unsupported VeNCrypt protocol %d.%d\n", (int)data[0], (int)data[1]);
-	vnc_write_u8(vs, 1); /* Reject version */
-	vnc_flush(vs);
-	vnc_client_error(vs);
-    } else {
-	VNC_DEBUG("Sending allowed auth %d\n", vs->vd->subauth);
-	vnc_write_u8(vs, 0); /* Accept version */
-	vnc_write_u8(vs, 1); /* Number of sub-auths */
-	vnc_write_u32(vs, vs->vd->subauth); /* The supported auth */
-	vnc_flush(vs);
-	vnc_read_when(vs, protocol_client_vencrypt_auth, 4);
-    }
-    return 0;
-}
-
-static int start_auth_vencrypt(VncState *vs)
-{
-    /* Send VeNCrypt version 0.2 */
-    vnc_write_u8(vs, 0);
-    vnc_write_u8(vs, 2);
-
-    vnc_read_when(vs, protocol_client_vencrypt_init, 2);
-    return 0;
-}
-#endif /* CONFIG_VNC_TLS */
-
 static int protocol_client_auth(VncState *vs, uint8_t *data, size_t len)
 {
     /* We only advertise 1 auth scheme at a time, so client
@@ -2163,17 +1707,19 @@ static int protocol_client_auth(VncState
                vnc_write_u32(vs, 0); /* Accept auth completion */
                vnc_flush(vs);
            }
-           vnc_read_when(vs, protocol_client_init, 1);
+           start_client_init(vs);
            break;
 
        case VNC_AUTH_VNC:
            VNC_DEBUG("Start VNC auth\n");
-           return start_auth_vnc(vs);
+           start_auth_vnc(vs);
+           break;
 
 #ifdef CONFIG_VNC_TLS
        case VNC_AUTH_VENCRYPT:
            VNC_DEBUG("Accept VeNCrypt auth\n");;
-           return start_auth_vencrypt(vs);
+           start_auth_vencrypt(vs);
+           break;
 #endif /* CONFIG_VNC_TLS */
 
        default: /* Should not be possible, but just in case */
@@ -2226,7 +1772,7 @@ static int protocol_version(VncState *vs
             VNC_DEBUG("Tell client auth none\n");
             vnc_write_u32(vs, vs->vd->auth);
             vnc_flush(vs);
-            vnc_read_when(vs, protocol_client_init, 1);
+	    start_client_init(vs);
        } else if (vs->vd->auth == VNC_AUTH_VNC) {
             VNC_DEBUG("Tell client VNC auth\n");
             vnc_write_u32(vs, vs->vd->auth);
@@ -2328,61 +1874,6 @@ void vnc_display_init(DisplayState *ds)
     register_displaychangelistener(ds, dcl);
 }
 
-#ifdef CONFIG_VNC_TLS
-static int vnc_set_x509_credential(VncDisplay *vs,
-				   const char *certdir,
-				   const char *filename,
-				   char **cred,
-				   int ignoreMissing)
-{
-    struct stat sb;
-
-    if (*cred) {
-	qemu_free(*cred);
-	*cred = NULL;
-    }
-
-    *cred = qemu_malloc(strlen(certdir) + strlen(filename) + 2);
-
-    strcpy(*cred, certdir);
-    strcat(*cred, "/");
-    strcat(*cred, filename);
-
-    VNC_DEBUG("Check %s\n", *cred);
-    if (stat(*cred, &sb) < 0) {
-	qemu_free(*cred);
-	*cred = NULL;
-	if (ignoreMissing && errno == ENOENT)
-	    return 0;
-	return -1;
-    }
-
-    return 0;
-}
-
-static int vnc_set_x509_credential_dir(VncDisplay *vs,
-				       const char *certdir)
-{
-    if (vnc_set_x509_credential(vs, certdir, X509_CA_CERT_FILE, &vs->x509cacert, 0) < 0)
-	goto cleanup;
-    if (vnc_set_x509_credential(vs, certdir, X509_CA_CRL_FILE, &vs->x509cacrl, 1) < 0)
-	goto cleanup;
-    if (vnc_set_x509_credential(vs, certdir, X509_SERVER_CERT_FILE, &vs->x509cert, 0) < 0)
-	goto cleanup;
-    if (vnc_set_x509_credential(vs, certdir, X509_SERVER_KEY_FILE, &vs->x509key, 0) < 0)
-	goto cleanup;
-
-    return 0;
-
- cleanup:
-    qemu_free(vs->x509cacert);
-    qemu_free(vs->x509cacrl);
-    qemu_free(vs->x509cert);
-    qemu_free(vs->x509key);
-    vs->x509cacert = vs->x509cacrl = vs->x509cert = vs->x509key = NULL;
-    return -1;
-}
-#endif /* CONFIG_VNC_TLS */
 
 void vnc_display_close(DisplayState *ds)
 {
@@ -2402,7 +1893,7 @@ void vnc_display_close(DisplayState *ds)
     vs->auth = VNC_AUTH_INVALID;
 #ifdef CONFIG_VNC_TLS
     vs->subauth = VNC_AUTH_INVALID;
-    vs->x509verify = 0;
+    vs->tls.x509verify = 0;
 #endif
 }
 
@@ -2458,7 +1949,7 @@ int vnc_display_open(DisplayState *ds, c
 	    char *start, *end;
 	    x509 = 1; /* Require x509 certificates */
 	    if (strncmp(options, "x509verify", 10) == 0)
-	        vs->x509verify = 1; /* ...and verify client certs */
+	        vs->tls.x509verify = 1; /* ...and verify client certs */
 
 	    /* Now check for 'x509=/some/path' postfix
 	     * and use that to setup x509 certificate/key paths */
@@ -2469,7 +1960,7 @@ int vnc_display_open(DisplayState *ds, c
 		char *path = qemu_strndup(start + 1, len);
 
 		VNC_DEBUG("Trying certificate path '%s'\n", path);
-		if (vnc_set_x509_credential_dir(vs, path) < 0) {
+		if (vnc_tls_set_x509_creds_dir(vs, path) < 0) {
 		    fprintf(stderr, "Failed to find x509 certificates/keys in %s\n", path);
 		    qemu_free(path);
 		    qemu_free(vs->display);
Index: qemu-kvm-0.10/qemu/vnc.h
===================================================================
--- qemu-kvm-0.10.orig/qemu/vnc.h
+++ qemu-kvm-0.10/qemu/vnc.h
@@ -32,13 +32,16 @@
 #include "audio/audio.h"
 #include <zlib.h>
 
-#ifdef CONFIG_VNC_TLS
-#include <gnutls/gnutls.h>
-#include <gnutls/x509.h>
-#endif /* CONFIG_VNC_TLS */
-
 #include "keymaps.h"
 
+// #define _VNC_DEBUG 1
+
+#ifdef _VNC_DEBUG
+#define VNC_DEBUG(fmt, ...) do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define VNC_DEBUG(fmt, ...) do { } while (0)
+#endif
+
 /*****************************************************************************
  *
  * Core data structures
@@ -72,6 +75,11 @@ typedef void VncSendHextileTile(VncState
 
 typedef struct VncDisplay VncDisplay;
 
+#ifdef CONFIG_VNC_TLS
+#include "vnc-tls.h"
+#include "vnc-auth-vencrypt.h"
+#endif
+
 struct VncDisplay
 {
     int lsock;
@@ -83,13 +91,8 @@ struct VncDisplay
     char *password;
     int auth;
 #ifdef CONFIG_VNC_TLS
-    int subauth;
-    int x509verify;
-
-    char *x509cacert;
-    char *x509cacrl;
-    char *x509cert;
-    char *x509key;
+    int subauth; /* Used by VeNCrypt */
+    VncDisplayTLS tls;
 #endif
 };
 
@@ -117,8 +120,7 @@ struct VncState
     char challenge[VNC_AUTH_CHALLENGE_SIZE];
 
 #ifdef CONFIG_VNC_TLS
-    int wiremode;
-    gnutls_session_t tls_session;
+    VncStateTLS tls;
 #endif
 
     Buffer output;
@@ -162,12 +164,6 @@ enum {
     VNC_AUTH_VENCRYPT = 19
 };
 
-#ifdef CONFIG_VNC_TLS
-enum {
-    VNC_WIREMODE_CLEAR,
-    VNC_WIREMODE_TLS,
-};
-
 enum {
     VNC_AUTH_VENCRYPT_PLAIN = 256,
     VNC_AUTH_VENCRYPT_TLSNONE = 257,
@@ -178,12 +174,6 @@ enum {
     VNC_AUTH_VENCRYPT_X509PLAIN = 262,
 };
 
-#define X509_CA_CERT_FILE "ca-cert.pem"
-#define X509_CA_CRL_FILE "ca-crl.pem"
-#define X509_SERVER_KEY_FILE "server-key.pem"
-#define X509_SERVER_CERT_FILE "server-cert.pem"
-
-#endif /* CONFIG_VNC_TLS */
 
 /*****************************************************************************
  *
@@ -254,4 +244,38 @@ enum {
 #define VNC_FEATURE_ZLIB_MASK                (1 << VNC_FEATURE_ZLIB)
 #define VNC_FEATURE_COPYRECT_MASK            (1 << VNC_FEATURE_COPYRECT)
 
+
+/*****************************************************************************
+ *
+ * Internal APIs
+ *
+ *****************************************************************************/
+
+/* Event loop functions */
+void vnc_client_read(void *opaque);
+void vnc_client_write(void *opaque);
+
+
+/* Protocol I/O functions */
+void vnc_write(VncState *vs, const void *data, size_t len);
+void vnc_write_u32(VncState *vs, uint32_t value);
+void vnc_write_s32(VncState *vs, int32_t value);
+void vnc_write_u16(VncState *vs, uint16_t value);
+void vnc_write_u8(VncState *vs, uint8_t value);
+void vnc_flush(VncState *vs);
+void vnc_read_when(VncState *vs, VncReadEvent *func, size_t expecting);
+
+
+/* Buffer I/O functions */
+uint8_t read_u8(uint8_t *data, size_t offset);
+uint16_t read_u16(uint8_t *data, size_t offset);
+int32_t read_s32(uint8_t *data, size_t offset);
+uint32_t read_u32(uint8_t *data, size_t offset);
+
+/* Protocol stage functions */
+void vnc_client_error(VncState *vs);
+
+void start_client_init(VncState *vs);
+void start_auth_vnc(VncState *vs);
+
 #endif /* __QEMU_VNC_H */