/*****************************************************************************
* gnutls.c
*****************************************************************************
- * Copyright (C) 2004-2011 Rémi Denis-Courmont
+ * Copyright (C) 2004-2012 Rémi Denis-Courmont
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * GNU Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ * You should have received a copy of the GNU Öesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
# include "config.h"
#endif
+#include <time.h>
#include <errno.h>
-#include <sys/types.h>
-#include <errno.h>
-
-#include <sys/stat.h>
-#ifdef WIN32
-# include <windows.h>
-# include <io.h>
-# include <wincrypt.h>
-#else
-# include <unistd.h>
-#endif
-#include <fcntl.h>
+#include <assert.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_tls.h>
-#include <vlc_charset.h>
-#include <vlc_fs.h>
#include <vlc_block.h>
+#include <vlc_dialog.h>
-#include <gcrypt.h>
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
-
-#include <vlc_gcrypt.h>
#include "dhparams.h"
-#include <assert.h>
-
/*****************************************************************************
* Module descriptor
*****************************************************************************/
-static int OpenClient (vlc_tls_t *, int, const char *);
-static void CloseClient (vlc_tls_t *);
-static int OpenServer (vlc_object_t *);
-static void CloseServer (vlc_object_t *);
+static int OpenClient (vlc_tls_creds_t *);
+static void CloseClient (vlc_tls_creds_t *);
+static int OpenServer (vlc_tls_creds_t *, const char *, const char *);
+static void CloseServer (vlc_tls_creds_t *);
#define PRIORITIES_TEXT N_("TLS cipher priorities")
#define PRIORITIES_LONGTEXT N_("Ciphers, key exchange methods, " \
set_capability( "tls client", 1 )
set_callbacks( OpenClient, CloseClient )
set_category( CAT_ADVANCED )
- set_subcategory( SUBCAT_ADVANCED_MISC )
+ set_subcategory( SUBCAT_ADVANCED_NETWORK )
add_submodule ()
set_description( N_("GNU TLS server") )
set_capability( "tls server", 1 )
set_category( CAT_ADVANCED )
- set_subcategory( SUBCAT_ADVANCED_MISC )
+ set_subcategory( SUBCAT_ADVANCED_NETWORK )
set_callbacks( OpenServer, CloseServer )
add_string ("gnutls-priorities", "NORMAL", PRIORITIES_TEXT,
PRIORITIES_LONGTEXT, false)
- change_string_list (priorities_values, priorities_text, NULL)
+ change_string_list (priorities_values, priorities_text)
vlc_module_end ()
static vlc_mutex_t gnutls_mutex = VLC_STATIC_MUTEX;
{
int ret = VLC_EGENERIC;
- vlc_gcrypt_init (); /* GnuTLS depends on gcrypt */
-
vlc_mutex_lock (&gnutls_mutex);
if (gnutls_global_init ())
{
goto error;
}
- const char *psz_version = gnutls_check_version ("2.0.0");
+ const char *psz_version = gnutls_check_version ("3.0.20");
if (psz_version == NULL)
{
msg_Err (p_this, "unsupported GnuTLS version");
switch (val)
{
case GNUTLS_E_AGAIN:
-#ifdef WIN32
+#ifdef _WIN32
WSASetLastError (WSAEWOULDBLOCK);
#else
errno = EAGAIN;
break;
case GNUTLS_E_INTERRUPTED:
-#ifdef WIN32
+#ifdef _WIN32
WSASetLastError (WSAEINTR);
#else
errno = EINTR;
if (!gnutls_error_is_fatal (val))
msg_Err (obj, "Error above should be handled");
#endif
-#ifdef WIN32
+#ifdef _WIN32
WSASetLastError (WSAECONNRESET);
#else
errno = ECONNRESET;
}
#define gnutls_Error(o, val) gnutls_Error(VLC_OBJECT(o), val)
-
struct vlc_tls_sys
{
gnutls_session_t session;
- gnutls_certificate_credentials_t x509_cred;
- char *hostname;
bool handshaked;
};
* 1 if more would-be blocking recv is needed,
* 2 if more would-be blocking send is required.
*/
-static int gnutls_ContinueHandshake (vlc_tls_t *session)
+static int gnutls_ContinueHandshake (vlc_tls_t *session, const char *host,
+ const char *service)
{
vlc_tls_sys_t *sys = session->sys;
int val;
-#ifdef WIN32
+#ifdef _WIN32
WSASetLastError (0);
#endif
- val = gnutls_handshake (sys->session);
- if ((val == GNUTLS_E_AGAIN) || (val == GNUTLS_E_INTERRUPTED))
- return 1 + gnutls_record_get_direction (sys->session);
+ do
+ {
+ val = gnutls_handshake (sys->session);
+ msg_Dbg (session, "TLS handshake: %s", gnutls_strerror (val));
+
+ if ((val == GNUTLS_E_AGAIN) || (val == GNUTLS_E_INTERRUPTED))
+ /* I/O event: return to caller's poll() loop */
+ return 1 + gnutls_record_get_direction (sys->session);
+ }
+ while (val < 0 && !gnutls_error_is_fatal (val));
if (val < 0)
{
-#ifdef WIN32
+#ifdef _WIN32
msg_Dbg (session, "Winsock error %d", WSAGetLastError ());
#endif
msg_Err (session, "TLS handshake error: %s", gnutls_strerror (val));
}
sys->handshaked = true;
+ (void) host; (void) service;
return 0;
}
-typedef struct
+/**
+ * Looks up certificate in known hosts data base.
+ * @return 0 on success, -1 on failure.
+ */
+static int gnutls_CertSearch (vlc_tls_t *obj, const char *host,
+ const char *service,
+ const gnutls_datum_t *restrict datum)
{
- int flag;
+ assert (host != NULL);
+
+ /* Look up mismatching certificate in store */
+ int val = gnutls_verify_stored_pubkey (NULL, NULL, host, service,
+ GNUTLS_CRT_X509, datum, 0);
const char *msg;
-} error_msg_t;
+ switch (val)
+ {
+ case 0:
+ msg_Dbg (obj, "certificate key match for %s", host);
+ return 0;
+ case GNUTLS_E_NO_CERTIFICATE_FOUND:
+ msg_Dbg (obj, "no known certificates for %s", host);
+ msg = N_("You attempted to reach %s. "
+ "However the security certificate presented by the server "
+ "is unknown and could not be authenticated by any trusted "
+ "Certification Authority. "
+ "This problem may be caused by a configuration error "
+ "or an attempt to breach your security or your privacy.\n\n"
+ "If in doubt, abort now.\n");
+ break;
+ case GNUTLS_E_CERTIFICATE_KEY_MISMATCH:
+ msg_Dbg (obj, "certificate keys mismatch for %s", host);
+ msg = N_("You attempted to reach %s. "
+ "However the security certificate presented by the server "
+ "changed since the previous visit "
+ "and was not authenticated by any trusted "
+ "Certification Authority. "
+ "This problem may be caused by a configuration error "
+ "or an attempt to breach your security or your privacy.\n\n"
+ "If in doubt, abort now.\n");
+ break;
+ default:
+ msg_Err (obj, "certificate key match error for %s: %s", host,
+ gnutls_strerror (val));
+ return -1;
+ }
+
+ if (dialog_Question (obj, _("Insecure site"), vlc_gettext (msg),
+ _("Abort"), _("View certificate"), NULL, host) != 2)
+ return -1;
+
+ gnutls_x509_crt_t cert;
+ gnutls_datum_t desc;
-static const error_msg_t cert_errors[] =
+ if (gnutls_x509_crt_init (&cert))
+ return -1;
+ if (gnutls_x509_crt_import (cert, datum, GNUTLS_X509_FMT_DER)
+ || gnutls_x509_crt_print (cert, GNUTLS_CRT_PRINT_ONELINE, &desc))
+ {
+ gnutls_x509_crt_deinit (cert);
+ return -1;
+ }
+ gnutls_x509_crt_deinit (cert);
+
+ val = dialog_Question (obj, _("Insecure site"),
+ _("This is the certificate presented by %s:\n%s\n\n"
+ "If in doubt, abort now.\n"),
+ _("Abort"), _("Accept 24 hours"),
+ _("Accept permanently"), host, desc.data);
+ gnutls_free (desc.data);
+
+ time_t expiry = 0;
+ switch (val)
+ {
+ case 2:
+ time (&expiry);
+ expiry += 24 * 60 * 60;
+ case 3:
+ val = gnutls_store_pubkey (NULL, NULL, host, service,
+ GNUTLS_CRT_X509, datum, expiry, 0);
+ if (val)
+ msg_Err (obj, "cannot store X.509 certificate: %s",
+ gnutls_strerror (val));
+ return 0;
+ }
+ return -1;
+}
+
+
+static struct
+{
+ unsigned flag;
+ const char msg[29];
+} cert_errs[] =
{
- { GNUTLS_CERT_INVALID,
- "Certificate could not be verified" },
- { GNUTLS_CERT_REVOKED,
- "Certificate was revoked" },
- { GNUTLS_CERT_SIGNER_NOT_FOUND,
- "Certificate's signer was not found" },
- { GNUTLS_CERT_SIGNER_NOT_CA,
- "Certificate's signer is not a CA" },
- { GNUTLS_CERT_INSECURE_ALGORITHM,
- "Insecure certificate signature algorithm" },
- { 0, NULL }
+ { GNUTLS_CERT_INVALID, "Certificate not verified" },
+ { GNUTLS_CERT_REVOKED, "Certificate revoked" },
+ { GNUTLS_CERT_SIGNER_NOT_FOUND, "Signer not found" },
+ { GNUTLS_CERT_SIGNER_NOT_CA, "Signer not a CA" },
+ { GNUTLS_CERT_INSECURE_ALGORITHM, "Signature algorithm insecure" },
+ { GNUTLS_CERT_NOT_ACTIVATED, "Certificate not activated" },
+ { GNUTLS_CERT_EXPIRED, "Certificate expired" },
};
-static int gnutls_HandshakeAndValidate (vlc_tls_t *session)
+static int gnutls_HandshakeAndValidate (vlc_tls_t *session, const char *host,
+ const char *service)
{
vlc_tls_sys_t *sys = session->sys;
- int val = gnutls_ContinueHandshake (session);
+ int val = gnutls_ContinueHandshake (session, host, service);
if (val)
return val;
val = gnutls_certificate_verify_peers2 (sys->session, &status);
if (val)
{
- msg_Err (session, "Certificate verification failed: %s",
+ msg_Err (session, "Certificate verification error: %s",
gnutls_strerror (val));
return -1;
}
-
if (status)
{
- msg_Err (session, "TLS session: access denied");
- for (const error_msg_t *e = cert_errors; e->flag; e++)
- {
- if (status & e->flag)
- {
- msg_Err (session, "%s", e->msg);
- status &= ~e->flag;
- }
- }
-
- if (status)
- msg_Err (session,
- "unknown certificate error (you found a bug in VLC)");
- return -1;
+ msg_Err (session, "Certificate verification failure (0x%04X)", status);
+ for (size_t i = 0; i < sizeof (cert_errs) / sizeof (cert_errs[0]); i++)
+ if (status & cert_errs[i].flag)
+ msg_Err (session, " * %s", cert_errs[i].msg);
+ if (status & ~(GNUTLS_CERT_INVALID|GNUTLS_CERT_SIGNER_NOT_FOUND))
+ return -1;
}
/* certificate (host)name verification */
const gnutls_datum_t *data;
- data = gnutls_certificate_get_peers (sys->session, &(unsigned){0});
- if (data == NULL)
+ unsigned count;
+ data = gnutls_certificate_get_peers (sys->session, &count);
+ if (data == NULL || count == 0)
{
msg_Err (session, "Peer certificate not available");
return -1;
}
+ msg_Dbg (session, "%u certificate(s) in the list", count);
+
+ if (val || host == NULL)
+ return val;
+ if (status && gnutls_CertSearch (session, host, service, data))
+ return -1;
gnutls_x509_crt_t cert;
val = gnutls_x509_crt_init (&cert);
if (val)
{
- msg_Err (session, "x509 fatal error: %s", gnutls_strerror (val));
+ msg_Err (session, "X.509 fatal error: %s", gnutls_strerror (val));
return -1;
}
goto error;
}
- if (sys->hostname != NULL
- && !gnutls_x509_crt_check_hostname (cert, sys->hostname))
+ val = !gnutls_x509_crt_check_hostname (cert, host);
+ if (val)
{
- msg_Err (session, "Certificate does not match \"%s\"", sys->hostname);
- goto error;
+ msg_Err (session, "Certificate does not match \"%s\"", host);
+ val = gnutls_CertSearch (session, host, service, data);
}
-
- gnutls_x509_crt_deinit (cert);
- msg_Dbg (session, "TLS/x509 certificate verified");
- return 0;
-
error:
gnutls_x509_crt_deinit (cert);
- return -1;
+ return val;
}
static int
return val;
}
-#ifndef WIN32
-/**
- * Loads x509 credentials from a file descriptor (directory or regular file)
- * and closes the descriptor.
- */
-static void gnutls_x509_AddFD (vlc_object_t *obj,
- gnutls_certificate_credentials_t cred,
- int fd, bool priv, unsigned recursion)
-{
- DIR *dir = fdopendir (fd);
- if (dir != NULL)
- {
- if (recursion == 0)
- goto skipdir;
- recursion--;
-
- for (;;)
- {
- char *ent = vlc_readdir (dir);
- if (ent == NULL)
- break;
-
- if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
- {
- free (ent);
- continue;
- }
-
- int nfd = vlc_openat (fd, ent, O_RDONLY);
- if (nfd != -1)
- {
- msg_Dbg (obj, "loading x509 credentials from %s...", ent);
- gnutls_x509_AddFD (obj, cred, nfd, priv, recursion);
- }
- else
- msg_Dbg (obj, "cannot access x509 credentials in %s", ent);
- free (ent);
- }
- skipdir:
- closedir (dir);
- return;
- }
-
- block_t *block = block_File (fd);
- if (block != NULL)
- {
- gnutls_datum data = {
- .data = block->p_buffer,
- .size = block->i_buffer,
- };
- int res = priv
- ? gnutls_certificate_set_x509_key_mem (cred, &data, &data,
- GNUTLS_X509_FMT_PEM)
- : gnutls_certificate_set_x509_trust_mem (cred, &data,
- GNUTLS_X509_FMT_PEM);
- block_Release (block);
-
- if (res < 0)
- msg_Warn (obj, "cannot add x509 credentials: %s",
- gnutls_strerror (res));
- else
- msg_Dbg (obj, "added %d %s(s)", res, priv ? "key" : "certificate");
- }
- else
- msg_Warn (obj, "cannot read x509 credentials: %m");
- close (fd);
-}
-
-static void gnutls_x509_AddPath (vlc_object_t *obj,
- gnutls_certificate_credentials cred,
- const char *path, bool priv)
-{
- msg_Dbg (obj, "loading x509 credentials in %s...", path);
- int fd = vlc_open (path, O_RDONLY);
- if (fd == -1)
- {
- msg_Warn (obj, "cannot access x509 in %s: %m", path);
- return;
- }
-
- gnutls_x509_AddFD (obj, cred, fd, priv, 5);
-}
-#else /* WIN32 */
-static int
-gnutls_loadOSCAList (vlc_object_t *p_this,
- gnutls_certificate_credentials cred)
-{
- HCERTSTORE hCertStore = CertOpenSystemStoreA((HCRYPTPROV)NULL, "ROOT");
- if (!hCertStore)
- {
- msg_Warn (p_this, "could not open the Cert SystemStore");
- return VLC_EGENERIC;
- }
-
- PCCERT_CONTEXT pCertContext = CertEnumCertificatesInStore(hCertStore, NULL);
- while( pCertContext )
- {
- gnutls_datum data = {
- .data = pCertContext->pbCertEncoded,
- .size = pCertContext->cbCertEncoded,
- };
-
- if(!gnutls_certificate_set_x509_trust_mem(cred, &data, GNUTLS_X509_FMT_DER))
- {
- msg_Warn (p_this, "cannot add x509 credential");
- return VLC_EGENERIC;
- }
-
- pCertContext = CertEnumCertificatesInStore(hCertStore, pCertContext);
- }
- return VLC_SUCCESS;
-}
-#endif /* WIN32 */
/**
- * Initializes a client-side TLS session.
- */
-static int OpenClient (vlc_tls_t *session, int fd, const char *hostname)
-{
- if (gnutls_Init (VLC_OBJECT(session)))
- return VLC_EGENERIC;
-
- vlc_tls_sys_t *sys = malloc (sizeof (*sys));
- if (unlikely(sys == NULL))
- {
- gnutls_Deinit (VLC_OBJECT(session));
- return VLC_ENOMEM;
- }
-
- session->sys = sys;
- session->sock.p_sys = session;
- session->sock.pf_send = gnutls_Send;
- session->sock.pf_recv = gnutls_Recv;
- sys->handshaked = false;
-
- int val = gnutls_certificate_allocate_credentials (&sys->x509_cred);
- if (val != 0)
- {
- msg_Err (session, "cannot allocate X509 credentials: %s",
- gnutls_strerror (val));
- goto error;
- }
-
-#ifndef WIN32
- char *userdir = config_GetUserDir (VLC_DATA_DIR);
- if (userdir != NULL)
- {
- char path[strlen (userdir) + sizeof ("/ssl/private/")];
- sprintf (path, "%s/ssl", userdir);
- vlc_mkdir (path, 0755);
-
- sprintf (path, "%s/ssl/certs/", userdir);
- gnutls_x509_AddPath (VLC_OBJECT(session), sys->x509_cred, path, false);
- sprintf (path, "%s/ssl/private/", userdir);
- gnutls_x509_AddPath (VLC_OBJECT(session), sys->x509_cred, path, true);
- free (userdir);
- }
-
- const char *confdir = config_GetConfDir ();
- {
- char path[strlen (confdir)
- + sizeof ("/ssl/certs/ca-certificates.crt")];
- sprintf (path, "%s/ssl/certs/ca-certificates.crt", confdir);
- gnutls_x509_AddPath (VLC_OBJECT(session), sys->x509_cred, path, false);
- }
-#else /* WIN32 */
- gnutls_loadOSCAList (VLC_OBJECT(session), sys->x509_cred);
-#endif
- gnutls_certificate_set_verify_flags (sys->x509_cred,
- GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT);
-
- session->handshake = gnutls_HandshakeAndValidate;
- /*session->_handshake = gnutls_ContinueHandshake;*/
-
- val = gnutls_init (&sys->session, GNUTLS_CLIENT);
- if (val != 0)
- {
- msg_Err (session, "cannot initialize TLS session: %s",
- gnutls_strerror (val));
- gnutls_certificate_free_credentials (sys->x509_cred);
- goto error;
- }
-
- if (gnutls_SessionPrioritize (VLC_OBJECT(session), sys->session))
- goto s_error;
-
- /* minimum DH prime bits */
- gnutls_dh_set_prime_bits (sys->session, 1024);
-
- val = gnutls_credentials_set (sys->session, GNUTLS_CRD_CERTIFICATE,
- sys->x509_cred);
- if (val < 0)
- {
- msg_Err (session, "cannot set TLS session credentials: %s",
- gnutls_strerror (val));
- goto s_error;
- }
-
- /* server name */
- if (likely(hostname != NULL))
- {
- /* fill Server Name Indication */
- gnutls_server_name_set (sys->session, GNUTLS_NAME_DNS,
- hostname, strlen (hostname));
- /* keep hostname to match CNAME after handshake */
- sys->hostname = strdup (hostname);
- if (unlikely(sys->hostname == NULL))
- goto s_error;
- }
- else
- sys->hostname = NULL;
-
- gnutls_transport_set_ptr (sys->session,
- (gnutls_transport_ptr_t)(intptr_t)fd);
- return VLC_SUCCESS;
-
-s_error:
- gnutls_deinit (sys->session);
- gnutls_certificate_free_credentials (sys->x509_cred);
-error:
- gnutls_Deinit (VLC_OBJECT(session));
- free (sys);
- return VLC_EGENERIC;
-}
-
-
-static void CloseClient (vlc_tls_t *session)
-{
- vlc_tls_sys_t *sys = session->sys;
-
- if (sys->handshaked)
- gnutls_bye (sys->session, GNUTLS_SHUT_WR);
- gnutls_deinit (sys->session);
- /* credentials must be free'd *after* gnutls_deinit() */
- gnutls_certificate_free_credentials (sys->x509_cred);
-
- gnutls_Deinit (VLC_OBJECT(session));
- free (sys->hostname);
- free (sys);
-}
-
-
-/**
- * Server-side TLS
+ * TLS credentials private data
*/
struct vlc_tls_creds_sys
{
gnutls_certificate_credentials_t x509_cred;
- gnutls_dh_params_t dh_params;
- int (*handshake) (vlc_tls_t *);
+ gnutls_dh_params_t dh_params; /* XXX: used for server only */
+ int (*handshake) (vlc_tls_t *, const char *, const char *);
+ /* ^^ XXX: useful for server only */
};
* Terminates TLS session and releases session data.
* You still have to close the socket yourself.
*/
-static void gnutls_SessionClose (vlc_tls_t *session)
+static void gnutls_SessionClose (vlc_tls_creds_t *crd, vlc_tls_t *session)
{
vlc_tls_sys_t *sys = session->sys;
gnutls_bye (sys->session, GNUTLS_SHUT_WR);
gnutls_deinit (sys->session);
- vlc_object_release (session);
free (sys);
+ (void) crd;
}
/**
* Initializes a server-side TLS session.
*/
-static vlc_tls_t *gnutls_SessionOpen (vlc_tls_creds_t *server, int fd)
+static int gnutls_SessionOpen (vlc_tls_creds_t *crd, vlc_tls_t *session,
+ int type, int fd)
{
- vlc_tls_creds_sys_t *ssys = server->sys;
- int val;
-
- vlc_tls_t *session = vlc_object_create (server, sizeof (*session));
- if (unlikely(session == NULL))
- return NULL;
-
vlc_tls_sys_t *sys = malloc (sizeof (*session->sys));
if (unlikely(sys == NULL))
- {
- vlc_object_release (session);
- return NULL;
- }
+ return VLC_ENOMEM;
session->sys = sys;
session->sock.p_sys = session;
session->sock.pf_send = gnutls_Send;
session->sock.pf_recv = gnutls_Recv;
- session->handshake = ssys->handshake;
- session->u.close = gnutls_SessionClose;
+ session->handshake = crd->sys->handshake;
sys->handshaked = false;
- sys->hostname = NULL;
- val = gnutls_init (&sys->session, GNUTLS_SERVER);
+ int val = gnutls_init (&sys->session, type);
if (val != 0)
{
- msg_Err (server, "cannot initialize TLS session: %s",
+ msg_Err (session, "cannot initialize TLS session: %s",
gnutls_strerror (val));
free (sys);
- vlc_object_release (session);
- return NULL;
+ return VLC_EGENERIC;
}
- if (gnutls_SessionPrioritize (VLC_OBJECT (server), sys->session))
+ if (gnutls_SessionPrioritize (VLC_OBJECT (crd), sys->session))
goto error;
val = gnutls_credentials_set (sys->session, GNUTLS_CRD_CERTIFICATE,
- ssys->x509_cred);
+ crd->sys->x509_cred);
if (val < 0)
{
- msg_Err (server, "cannot set TLS session credentials: %s",
+ msg_Err (session, "cannot set TLS session credentials: %s",
gnutls_strerror (val));
goto error;
}
- if (session->handshake == gnutls_HandshakeAndValidate)
- gnutls_certificate_server_set_request (sys->session,
- GNUTLS_CERT_REQUIRE);
-
gnutls_transport_set_ptr (sys->session,
(gnutls_transport_ptr_t)(intptr_t)fd);
- return session;
+ return VLC_SUCCESS;
error:
- gnutls_SessionClose (session);
- return NULL;
+ gnutls_SessionClose (crd, session);
+ return VLC_EGENERIC;
+}
+
+static int gnutls_ServerSessionOpen (vlc_tls_creds_t *crd, vlc_tls_t *session,
+ int fd, const char *hostname)
+{
+ int val = gnutls_SessionOpen (crd, session, GNUTLS_SERVER, fd);
+ if (val != VLC_SUCCESS)
+ return val;
+
+ if (session->handshake == gnutls_HandshakeAndValidate)
+ gnutls_certificate_server_set_request (session->sys->session,
+ GNUTLS_CERT_REQUIRE);
+ assert (hostname == NULL);
+ return VLC_SUCCESS;
+}
+
+static int gnutls_ClientSessionOpen (vlc_tls_creds_t *crd, vlc_tls_t *session,
+ int fd, const char *hostname)
+{
+ int val = gnutls_SessionOpen (crd, session, GNUTLS_CLIENT, fd);
+ if (val != VLC_SUCCESS)
+ return val;
+
+ vlc_tls_sys_t *sys = session->sys;
+
+ /* minimum DH prime bits */
+ gnutls_dh_set_prime_bits (sys->session, 1024);
+
+ if (likely(hostname != NULL))
+ /* fill Server Name Indication */
+ gnutls_server_name_set (sys->session, GNUTLS_NAME_DNS,
+ hostname, strlen (hostname));
+
+ return VLC_SUCCESS;
}
/**
- * Adds one or more certificate authorities.
+ * Adds one or more Certificate Authorities to the trusted set.
*
- * @param ca_path (Unicode) path to an x509 certificates list.
+ * @param path (UTF-8) path to an X.509 certificates list.
*
* @return -1 on error, 0 on success.
*/
-static int gnutls_ServerAddCA (vlc_tls_creds_t *server, const char *ca_path)
+static int gnutls_AddCA (vlc_tls_creds_t *crd, const char *path)
{
- vlc_tls_creds_sys_t *sys = server->sys;
- const char *local_path = ToLocale (ca_path);
+ block_t *block = block_FilePath (path);
+ if (block == NULL)
+ {
+ msg_Err (crd, "cannot read trusted CA from %s: %m", path);
+ return VLC_EGENERIC;
+ }
- int val = gnutls_certificate_set_x509_trust_file (sys->x509_cred,
- local_path,
- GNUTLS_X509_FMT_PEM );
- LocaleFree (local_path);
+ gnutls_datum_t d = {
+ .data = block->p_buffer,
+ .size = block->i_buffer,
+ };
+
+ int val = gnutls_certificate_set_x509_trust_mem (crd->sys->x509_cred, &d,
+ GNUTLS_X509_FMT_PEM);
+ block_Release (block);
if (val < 0)
{
- msg_Err (server, "cannot add trusted CA (%s): %s", ca_path,
+ msg_Err (crd, "cannot load trusted CA from %s: %s", path,
gnutls_strerror (val));
return VLC_EGENERIC;
}
- msg_Dbg (server, " %d trusted CA added (%s)", val, ca_path);
+ msg_Dbg (crd, " %d trusted CA%s added from %s", val, (val != 1) ? "s" : "",
+ path);
/* enables peer's certificate verification */
- sys->handshake = gnutls_HandshakeAndValidate;
-
+ crd->sys->handshake = gnutls_HandshakeAndValidate;
return VLC_SUCCESS;
}
/**
- * Adds a certificates revocation list to be sent to TLS clients.
+ * Adds a Certificates Revocation List to be sent to TLS clients.
*
- * @param crl_path (Unicode) path of the CRL file.
+ * @param path (UTF-8) path of the CRL file.
*
* @return -1 on error, 0 on success.
*/
-static int gnutls_ServerAddCRL (vlc_tls_creds_t *server, const char *crl_path)
+static int gnutls_AddCRL (vlc_tls_creds_t *crd, const char *path)
{
- vlc_tls_creds_sys_t *sys = server->sys;
- const char *local_path = ToLocale (crl_path);
+ block_t *block = block_FilePath (path);
+ if (block == NULL)
+ {
+ msg_Err (crd, "cannot read CRL from %s: %m", path);
+ return VLC_EGENERIC;
+ }
+
+ gnutls_datum_t d = {
+ .data = block->p_buffer,
+ .size = block->i_buffer,
+ };
- int val = gnutls_certificate_set_x509_crl_file (sys->x509_cred,
- local_path,
- GNUTLS_X509_FMT_PEM);
- LocaleFree (local_path);
+ int val = gnutls_certificate_set_x509_crl_mem (crd->sys->x509_cred, &d,
+ GNUTLS_X509_FMT_PEM);
+ block_Release (block);
if (val < 0)
{
- msg_Err (server, "cannot add CRL (%s): %s", crl_path,
- gnutls_strerror (val));
+ msg_Err (crd, "cannot add CRL (%s): %s", path, gnutls_strerror (val));
return VLC_EGENERIC;
}
- msg_Dbg (server, "%d CRL added (%s)", val, crl_path);
+ msg_Dbg (crd, "%d CRL%s added from %s", val, (val != 1) ? "s" : "", path);
return VLC_SUCCESS;
}
/**
* Allocates a whole server's TLS credentials.
*/
-static int OpenServer (vlc_object_t *obj)
+static int OpenServer (vlc_tls_creds_t *crd, const char *cert, const char *key)
{
- vlc_tls_creds_t *server = (vlc_tls_creds_t *)obj;
int val;
- if (gnutls_Init (obj))
+ if (gnutls_Init (VLC_OBJECT(crd)))
return VLC_EGENERIC;
- msg_Dbg (obj, "creating TLS server");
-
vlc_tls_creds_sys_t *sys = malloc (sizeof (*sys));
if (unlikely(sys == NULL))
- return VLC_ENOMEM;
+ goto error;
- server->sys = sys;
- server->add_CA = gnutls_ServerAddCA;
- server->add_CRL = gnutls_ServerAddCRL;
- server->open = gnutls_SessionOpen;
+ crd->sys = sys;
+ crd->add_CA = gnutls_AddCA;
+ crd->add_CRL = gnutls_AddCRL;
+ crd->open = gnutls_ServerSessionOpen;
+ crd->close = gnutls_SessionClose;
/* No certificate validation by default */
sys->handshake = gnutls_ContinueHandshake;
val = gnutls_certificate_allocate_credentials (&sys->x509_cred);
if (val != 0)
{
- msg_Err (server, "cannot allocate X509 credentials: %s",
+ msg_Err (crd, "cannot allocate credentials: %s",
gnutls_strerror (val));
goto error;
}
- char *cert_path = var_GetNonEmptyString (obj, "tls-x509-cert");
- char *key_path = var_GetNonEmptyString (obj, "tls-x509-key");
- const char *lcert = ToLocale (cert_path);
- const char *lkey = ToLocale (key_path);
- val = gnutls_certificate_set_x509_key_file (sys->x509_cred, lcert, lkey,
- GNUTLS_X509_FMT_PEM);
- LocaleFree (lkey);
- LocaleFree (lcert);
- free (key_path);
- free (cert_path);
+ block_t *certblock = block_FilePath (cert);
+ if (certblock == NULL)
+ {
+ msg_Err (crd, "cannot read certificate chain from %s: %m", cert);
+ return VLC_EGENERIC;
+ }
+ block_t *keyblock = block_FilePath (key);
+ if (keyblock == NULL)
+ {
+ msg_Err (crd, "cannot read private key from %s: %m", key);
+ block_Release (certblock);
+ return VLC_EGENERIC;
+ }
+
+ gnutls_datum_t pub = {
+ .data = certblock->p_buffer,
+ .size = certblock->i_buffer,
+ }, priv = {
+ .data = keyblock->p_buffer,
+ .size = keyblock->i_buffer,
+ };
+
+ val = gnutls_certificate_set_x509_key_mem (sys->x509_cred, &pub, &priv,
+ GNUTLS_X509_FMT_PEM);
+ block_Release (keyblock);
+ block_Release (certblock);
if (val < 0)
{
- msg_Err (server, "cannot set certificate chain or private key: %s",
- gnutls_strerror (val));
+ msg_Err (crd, "cannot load X.509 key: %s", gnutls_strerror (val));
gnutls_certificate_free_credentials (sys->x509_cred);
goto error;
}
}
if (val < 0)
{
- msg_Err (server, "cannot initialize DHE cipher suites: %s",
+ msg_Err (crd, "cannot initialize DHE cipher suites: %s",
gnutls_strerror (val));
}
error:
free (sys);
+ gnutls_Deinit (VLC_OBJECT(crd));
return VLC_EGENERIC;
}
/**
* Destroys a TLS server object.
*/
-static void CloseServer (vlc_object_t *obj)
+static void CloseServer (vlc_tls_creds_t *crd)
{
- vlc_tls_creds_t *server = (vlc_tls_creds_t *)obj;
- vlc_tls_creds_sys_t *sys = server->sys;
+ vlc_tls_creds_sys_t *sys = crd->sys;
/* all sessions depending on the server are now deinitialized */
gnutls_certificate_free_credentials (sys->x509_cred);
gnutls_dh_params_deinit (sys->dh_params);
free (sys);
- gnutls_Deinit (obj);
+ gnutls_Deinit (VLC_OBJECT(crd));
+}
+
+/**
+ * Initializes a client-side TLS credentials.
+ */
+static int OpenClient (vlc_tls_creds_t *crd)
+{
+ if (gnutls_Init (VLC_OBJECT(crd)))
+ return VLC_EGENERIC;
+
+ vlc_tls_creds_sys_t *sys = malloc (sizeof (*sys));
+ if (unlikely(sys == NULL))
+ goto error;
+
+ crd->sys = sys;
+ //crd->add_CA = gnutls_AddCA;
+ //crd->add_CRL = gnutls_AddCRL;
+ crd->open = gnutls_ClientSessionOpen;
+ crd->close = gnutls_SessionClose;
+ sys->handshake = gnutls_HandshakeAndValidate;
+
+ int val = gnutls_certificate_allocate_credentials (&sys->x509_cred);
+ if (val != 0)
+ {
+ msg_Err (crd, "cannot allocate credentials: %s",
+ gnutls_strerror (val));
+ goto error;
+ }
+
+ val = gnutls_certificate_set_x509_system_trust (sys->x509_cred);
+ if (val < 0)
+ msg_Err (crd, "cannot load trusted Certificate Authorities: %s",
+ gnutls_strerror (val));
+ else
+ msg_Dbg (crd, "loaded %d trusted CAs", val);
+
+ gnutls_certificate_set_verify_flags (sys->x509_cred,
+ GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT);
+
+ return VLC_SUCCESS;
+error:
+ free (sys);
+ gnutls_Deinit (VLC_OBJECT(crd));
+ return VLC_EGENERIC;
+}
+
+static void CloseClient (vlc_tls_creds_t *crd)
+{
+ vlc_tls_creds_sys_t *sys = crd->sys;
+
+ gnutls_certificate_free_credentials (sys->x509_cred);
+ free (sys);
+
+ gnutls_Deinit (VLC_OBJECT(crd));
}
projects / vlc / blobdiff