mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
1211 lines
33 KiB
C
1211 lines
33 KiB
C
/*****************************************************************************
|
|
* gnutls.c
|
|
*****************************************************************************
|
|
* Copyright (C) 2004-2006 Rémi Denis-Courmont
|
|
* $Id$
|
|
*
|
|
* Authors: Rémi Denis-Courmont <rem # videolan.org>
|
|
*
|
|
* 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
|
|
* (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.
|
|
*
|
|
* 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.
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Preamble
|
|
*****************************************************************************/
|
|
|
|
#include <vlc/vlc.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <errno.h>
|
|
#ifdef HAVE_DIRENT_H
|
|
# include <dirent.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_STAT_H
|
|
# include <sys/stat.h>
|
|
# ifdef HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
# endif
|
|
#endif
|
|
|
|
|
|
#include "vlc_tls.h"
|
|
#include <vlc_charset.h>
|
|
|
|
#include <gcrypt.h>
|
|
#include <gnutls/gnutls.h>
|
|
#include <gnutls/x509.h>
|
|
|
|
#define CACHE_TIMEOUT 3600
|
|
#define CACHE_SIZE 64
|
|
|
|
#include "dhparams.h"
|
|
|
|
/*****************************************************************************
|
|
* Module descriptor
|
|
*****************************************************************************/
|
|
static int OpenClient (vlc_object_t *);
|
|
static void CloseClient (vlc_object_t *);
|
|
static int OpenServer (vlc_object_t *);
|
|
static void CloseServer (vlc_object_t *);
|
|
|
|
#define CACHE_TIMEOUT_TEXT N_("Expiration time for resumed TLS sessions")
|
|
#define CACHE_TIMEOUT_LONGTEXT N_( \
|
|
"It is possible to cache the resumed TLS sessions. This is the expiration "\
|
|
"time of the sessions stored in this cache, in seconds." )
|
|
|
|
#define CACHE_SIZE_TEXT N_("Number of resumed TLS sessions")
|
|
#define CACHE_SIZE_LONGTEXT N_( \
|
|
"This is the maximum number of resumed TLS sessions that " \
|
|
"the cache will hold." )
|
|
|
|
vlc_module_begin();
|
|
set_shortname( "GnuTLS" );
|
|
set_description( _("GnuTLS transport layer security") );
|
|
set_capability( "tls client", 1 );
|
|
set_callbacks( OpenClient, CloseClient );
|
|
set_category( CAT_ADVANCED );
|
|
set_subcategory( SUBCAT_ADVANCED_MISC );
|
|
|
|
add_obsolete_bool( "tls-check-cert" );
|
|
add_obsolete_bool( "tls-check-hostname" );
|
|
|
|
add_submodule();
|
|
set_description( _("GnuTLS server") );
|
|
set_capability( "tls server", 1 );
|
|
set_category( CAT_ADVANCED );
|
|
set_subcategory( SUBCAT_ADVANCED_MISC );
|
|
set_callbacks( OpenServer, CloseServer );
|
|
|
|
add_obsolete_integer( "gnutls-dh-bits" );
|
|
add_integer( "gnutls-cache-timeout", CACHE_TIMEOUT, NULL,
|
|
CACHE_TIMEOUT_TEXT, CACHE_TIMEOUT_LONGTEXT, VLC_TRUE );
|
|
add_integer( "gnutls-cache-size", CACHE_SIZE, NULL, CACHE_SIZE_TEXT,
|
|
CACHE_SIZE_LONGTEXT, VLC_TRUE );
|
|
vlc_module_end();
|
|
|
|
|
|
|
|
#ifdef LIBVLC_USE_PTHREAD
|
|
GCRY_THREAD_OPTION_PTHREAD_IMPL;
|
|
# define gcry_threads_vlc gcry_threads_pthread
|
|
#else
|
|
/**
|
|
* gcrypt thread option VLC implementation
|
|
*/
|
|
|
|
# define NEED_THREAD_CONTEXT 1
|
|
static vlc_object_t *__p_gcry_data = NULL;
|
|
|
|
static int gcry_vlc_mutex_init( void **p_sys )
|
|
{
|
|
int i_val;
|
|
vlc_mutex_t *p_lock = (vlc_mutex_t *)malloc( sizeof( vlc_mutex_t ) );
|
|
|
|
if( p_lock == NULL)
|
|
return ENOMEM;
|
|
|
|
i_val = vlc_mutex_init( __p_gcry_data, p_lock );
|
|
if( i_val )
|
|
free( p_lock );
|
|
else
|
|
*p_sys = p_lock;
|
|
return i_val;
|
|
}
|
|
|
|
static int gcry_vlc_mutex_destroy( void **p_sys )
|
|
{
|
|
int i_val;
|
|
vlc_mutex_t *p_lock = (vlc_mutex_t *)*p_sys;
|
|
|
|
i_val = vlc_mutex_destroy( p_lock );
|
|
free( p_lock );
|
|
return i_val;
|
|
}
|
|
|
|
static int gcry_vlc_mutex_lock( void **p_sys )
|
|
{
|
|
return vlc_mutex_lock( (vlc_mutex_t *)*p_sys );
|
|
}
|
|
|
|
static int gcry_vlc_mutex_unlock( void **lock )
|
|
{
|
|
return vlc_mutex_unlock( (vlc_mutex_t *)*lock );
|
|
}
|
|
|
|
static struct gcry_thread_cbs gcry_threads_vlc =
|
|
{
|
|
GCRY_THREAD_OPTION_USER,
|
|
NULL,
|
|
gcry_vlc_mutex_init,
|
|
gcry_vlc_mutex_destroy,
|
|
gcry_vlc_mutex_lock,
|
|
gcry_vlc_mutex_unlock
|
|
};
|
|
#endif
|
|
|
|
|
|
/**
|
|
* Initializes GnuTLS with proper locking.
|
|
* @return VLC_SUCCESS on success, a VLC error code otherwise.
|
|
*/
|
|
static int gnutls_Init (vlc_object_t *p_this)
|
|
{
|
|
int ret = VLC_EGENERIC;
|
|
|
|
vlc_mutex_t *lock = var_AcquireMutex ("gnutls_mutex");
|
|
|
|
/* This should probably be removed/fixed. It will screw up with multiple
|
|
* LibVLC instances. */
|
|
#ifdef NEED_THREAD_CONTEXT
|
|
__p_gcry_data = VLC_OBJECT (p_this->p_libvlc);
|
|
#endif
|
|
|
|
gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_vlc);
|
|
if (gnutls_global_init ())
|
|
{
|
|
msg_Err (p_this, "cannot initialize GnuTLS");
|
|
goto error;
|
|
}
|
|
|
|
const char *psz_version = gnutls_check_version ("1.3.3");
|
|
if (psz_version == NULL)
|
|
{
|
|
msg_Err (p_this, "unsupported GnuTLS version");
|
|
gnutls_global_deinit ();
|
|
goto error;
|
|
}
|
|
|
|
msg_Dbg (p_this, "GnuTLS v%s initialized", psz_version);
|
|
ret = VLC_SUCCESS;
|
|
|
|
error:
|
|
vlc_mutex_unlock (lock);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* Deinitializes GnuTLS.
|
|
*/
|
|
static void gnutls_Deinit (vlc_object_t *p_this)
|
|
{
|
|
vlc_mutex_t *lock = var_AcquireMutex( "gnutls_mutex" );
|
|
|
|
gnutls_global_deinit ();
|
|
msg_Dbg (p_this, "GnuTLS deinitialized");
|
|
vlc_mutex_unlock (lock);
|
|
}
|
|
|
|
|
|
static int gnutls_Error (vlc_object_t *obj, int val)
|
|
{
|
|
switch (val)
|
|
{
|
|
case GNUTLS_E_AGAIN:
|
|
#ifndef WIN32
|
|
errno = EAGAIN;
|
|
break;
|
|
#endif
|
|
/* WinSock does not return EAGAIN, return EINTR instead */
|
|
|
|
case GNUTLS_E_INTERRUPTED:
|
|
#ifdef WIN32
|
|
WSASetLastError (WSAEINTR);
|
|
#else
|
|
errno = EINTR;
|
|
#endif
|
|
break;
|
|
|
|
default:
|
|
msg_Err (obj, "%s", gnutls_strerror (val));
|
|
#ifndef NDEBUG
|
|
if (!gnutls_error_is_fatal (val))
|
|
msg_Err (obj, "Error above should be handled");
|
|
#endif
|
|
#ifdef WIN32
|
|
WSASetLastError (WSAECONNRESET);
|
|
#else
|
|
errno = ECONNRESET;
|
|
#endif
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
struct tls_session_sys_t
|
|
{
|
|
gnutls_session_t session;
|
|
char *psz_hostname;
|
|
vlc_bool_t b_handshaked;
|
|
};
|
|
|
|
|
|
/**
|
|
* Sends data through a TLS session.
|
|
*/
|
|
static int
|
|
gnutls_Send( void *p_session, const void *buf, int i_length )
|
|
{
|
|
int val;
|
|
tls_session_sys_t *p_sys;
|
|
|
|
p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
|
|
|
|
val = gnutls_record_send( p_sys->session, buf, i_length );
|
|
return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
|
|
}
|
|
|
|
|
|
/**
|
|
* Receives data through a TLS session.
|
|
*/
|
|
static int
|
|
gnutls_Recv( void *p_session, void *buf, int i_length )
|
|
{
|
|
int val;
|
|
tls_session_sys_t *p_sys;
|
|
|
|
p_sys = (tls_session_sys_t *)(((tls_session_t *)p_session)->p_sys);
|
|
|
|
val = gnutls_record_recv( p_sys->session, buf, i_length );
|
|
return (val < 0) ? gnutls_Error ((vlc_object_t *)p_session, val) : val;
|
|
}
|
|
|
|
|
|
/**
|
|
* Starts or continues the TLS handshake.
|
|
*
|
|
* @return -1 on fatal error, 0 on succesful handshake completion,
|
|
* 1 if more would-be blocking recv is needed,
|
|
* 2 if more would-be blocking send is required.
|
|
*/
|
|
static int
|
|
gnutls_ContinueHandshake (tls_session_t *p_session)
|
|
{
|
|
tls_session_sys_t *p_sys = p_session->p_sys;
|
|
int val;
|
|
|
|
#ifdef WIN32
|
|
WSASetLastError( 0 );
|
|
#endif
|
|
val = gnutls_handshake( p_sys->session );
|
|
if( ( val == GNUTLS_E_AGAIN ) || ( val == GNUTLS_E_INTERRUPTED ) )
|
|
return 1 + gnutls_record_get_direction( p_sys->session );
|
|
|
|
if( val < 0 )
|
|
{
|
|
#ifdef WIN32
|
|
msg_Dbg( p_session, "Winsock error %d", WSAGetLastError( ) );
|
|
#endif
|
|
msg_Err( p_session, "TLS handshake error: %s",
|
|
gnutls_strerror( val ) );
|
|
return -1;
|
|
}
|
|
|
|
p_sys->b_handshaked = VLC_TRUE;
|
|
return 0;
|
|
}
|
|
|
|
|
|
typedef struct
|
|
{
|
|
int flag;
|
|
const char *msg;
|
|
} error_msg_t;
|
|
|
|
static const error_msg_t cert_errors[] =
|
|
{
|
|
{ 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 }
|
|
};
|
|
|
|
|
|
static int
|
|
gnutls_HandshakeAndValidate( tls_session_t *session )
|
|
{
|
|
int val = gnutls_ContinueHandshake( session );
|
|
if( val )
|
|
return val;
|
|
|
|
tls_session_sys_t *p_sys = (tls_session_sys_t *)(session->p_sys);
|
|
|
|
/* certificates chain verification */
|
|
unsigned status;
|
|
val = gnutls_certificate_verify_peers2( p_sys->session, &status );
|
|
|
|
if( val )
|
|
{
|
|
msg_Err( session, "Certificate verification failed: %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;
|
|
}
|
|
|
|
/* certificate (host)name verification */
|
|
const gnutls_datum_t *data;
|
|
data = gnutls_certificate_get_peers (p_sys->session, &(unsigned){0});
|
|
if( data == NULL )
|
|
{
|
|
msg_Err( session, "Peer certificate not available" );
|
|
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 ) );
|
|
return -1;
|
|
}
|
|
|
|
val = gnutls_x509_crt_import( cert, data, GNUTLS_X509_FMT_DER );
|
|
if( val )
|
|
{
|
|
msg_Err( session, "Certificate import error: %s",
|
|
gnutls_strerror( val ) );
|
|
goto error;
|
|
}
|
|
|
|
assert( p_sys->psz_hostname != NULL );
|
|
if ( !gnutls_x509_crt_check_hostname( cert, p_sys->psz_hostname ) )
|
|
{
|
|
msg_Err( session, "Certificate does not match \"%s\"",
|
|
p_sys->psz_hostname );
|
|
goto error;
|
|
}
|
|
|
|
if( gnutls_x509_crt_get_expiration_time( cert ) < time( NULL ) )
|
|
{
|
|
msg_Err( session, "Certificate expired" );
|
|
goto error;
|
|
}
|
|
|
|
if( gnutls_x509_crt_get_activation_time( cert ) > time ( NULL ) )
|
|
{
|
|
msg_Err( session, "Certificate not yet valid" );
|
|
goto error;
|
|
}
|
|
|
|
gnutls_x509_crt_deinit( cert );
|
|
msg_Dbg( session, "TLS/x509 certificate verified" );
|
|
return 0;
|
|
|
|
error:
|
|
gnutls_x509_crt_deinit( cert );
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Sets the operating system file descriptor backend for the TLS sesison.
|
|
*
|
|
* @param fd stream socket already connected with the peer.
|
|
*/
|
|
static void
|
|
gnutls_SetFD (tls_session_t *p_session, int fd)
|
|
{
|
|
gnutls_transport_set_ptr (p_session->p_sys->session,
|
|
(gnutls_transport_ptr_t)(intptr_t)fd);
|
|
}
|
|
|
|
typedef int (*tls_prio_func) (gnutls_session_t, const int *);
|
|
|
|
static int
|
|
gnutls_SetPriority (vlc_object_t *restrict obj, const char *restrict name,
|
|
tls_prio_func func, gnutls_session_t session,
|
|
const int *restrict values)
|
|
{
|
|
int val = func (session, values);
|
|
if (val < 0)
|
|
{
|
|
msg_Err (obj, "cannot set %s priorities: %s", name,
|
|
gnutls_strerror (val));
|
|
return VLC_EGENERIC;
|
|
}
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
|
|
static int
|
|
gnutls_SessionPrioritize (vlc_object_t *obj, gnutls_session_t session)
|
|
{
|
|
/* Note that ordering matters (on the client side) */
|
|
static const int protos[] =
|
|
{
|
|
GNUTLS_TLS1_1,
|
|
GNUTLS_TLS1_0,
|
|
GNUTLS_SSL3,
|
|
0
|
|
};
|
|
static const int comps[] =
|
|
{
|
|
GNUTLS_COMP_DEFLATE,
|
|
GNUTLS_COMP_NULL,
|
|
0
|
|
};
|
|
static const int macs[] =
|
|
{
|
|
GNUTLS_MAC_SHA1,
|
|
GNUTLS_MAC_RMD160, // RIPEMD
|
|
GNUTLS_MAC_MD5,
|
|
//GNUTLS_MAC_MD2,
|
|
//GNUTLS_MAC_NULL,
|
|
0
|
|
};
|
|
static const int ciphers[] =
|
|
{
|
|
GNUTLS_CIPHER_AES_256_CBC,
|
|
GNUTLS_CIPHER_AES_128_CBC,
|
|
GNUTLS_CIPHER_3DES_CBC,
|
|
GNUTLS_CIPHER_ARCFOUR_128,
|
|
//GNUTLS_CIPHER_DES_CBC,
|
|
//GNUTLS_CIPHER_ARCFOUR_40,
|
|
//GNUTLS_CIPHER_RC2_40_CBC,
|
|
//GNUTLS_CIPHER_NULL,
|
|
0
|
|
};
|
|
static const int kx[] =
|
|
{
|
|
GNUTLS_KX_DHE_RSA,
|
|
GNUTLS_KX_DHE_DSS,
|
|
GNUTLS_KX_RSA,
|
|
//GNUTLS_KX_RSA_EXPORT,
|
|
//GNUTLS_KX_DHE_PSK, TODO
|
|
//GNUTLS_KX_PSK, TODO
|
|
//GNUTLS_KX_SRP_RSA, TODO
|
|
//GNUTLS_KX_SRP_DSS, TODO
|
|
//GNUTLS_KX_SRP, TODO
|
|
//GNUTLS_KX_ANON_DH,
|
|
0
|
|
};
|
|
static const int cert_types[] =
|
|
{
|
|
GNUTLS_CRT_X509,
|
|
//GNUTLS_CRT_OPENPGP, TODO
|
|
0
|
|
};
|
|
|
|
int val = gnutls_set_default_priority (session);
|
|
if (val < 0)
|
|
{
|
|
msg_Err (obj, "cannot set default TLS priorities: %s",
|
|
gnutls_strerror (val));
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
if (gnutls_SetPriority (obj, "protocols",
|
|
gnutls_protocol_set_priority, session, protos)
|
|
|| gnutls_SetPriority (obj, "compression algorithms",
|
|
gnutls_compression_set_priority, session, comps)
|
|
|| gnutls_SetPriority (obj, "MAC algorithms",
|
|
gnutls_mac_set_priority, session, macs)
|
|
|| gnutls_SetPriority (obj, "ciphers",
|
|
gnutls_cipher_set_priority, session, ciphers)
|
|
|| gnutls_SetPriority (obj, "key exchange algorithms",
|
|
gnutls_kx_set_priority, session, kx)
|
|
|| gnutls_SetPriority (obj, "certificate types",
|
|
gnutls_certificate_type_set_priority, session,
|
|
cert_types))
|
|
return VLC_EGENERIC;
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
|
|
static int
|
|
gnutls_Addx509File( vlc_object_t *p_this,
|
|
gnutls_certificate_credentials_t cred,
|
|
const char *psz_path, vlc_bool_t b_priv );
|
|
|
|
static int
|
|
gnutls_Addx509Directory( vlc_object_t *p_this,
|
|
gnutls_certificate_credentials_t cred,
|
|
const char *psz_dirname,
|
|
vlc_bool_t b_priv )
|
|
{
|
|
DIR* dir;
|
|
|
|
if( *psz_dirname == '\0' )
|
|
psz_dirname = ".";
|
|
|
|
dir = utf8_opendir( psz_dirname );
|
|
if( dir == NULL )
|
|
{
|
|
if (errno != ENOENT)
|
|
{
|
|
msg_Err (p_this, "cannot open directory (%s): %m", psz_dirname);
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
msg_Dbg (p_this, "creating empty certificate directory: %s",
|
|
psz_dirname);
|
|
utf8_mkdir (psz_dirname, b_priv ? 0700 : 0755);
|
|
return VLC_SUCCESS;
|
|
}
|
|
#ifdef S_ISLNK
|
|
else
|
|
{
|
|
struct stat st1, st2;
|
|
int fd = dirfd( dir );
|
|
|
|
/*
|
|
* Gets stats for the directory path, checks that it is not a
|
|
* symbolic link (to avoid possibly infinite recursion), and verifies
|
|
* that the inode is still the same, to avoid TOCTOU race condition.
|
|
*/
|
|
if( ( fd == -1)
|
|
|| fstat( fd, &st1 ) || utf8_lstat( psz_dirname, &st2 )
|
|
|| S_ISLNK( st2.st_mode ) || ( st1.st_ino != st2.st_ino ) )
|
|
{
|
|
closedir( dir );
|
|
return VLC_EGENERIC;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
for (;;)
|
|
{
|
|
char *ent = utf8_readdir (dir);
|
|
if (ent == NULL)
|
|
break;
|
|
|
|
if ((strcmp (ent, ".") == 0) || (strcmp (ent, "..") == 0))
|
|
continue;
|
|
|
|
char path[strlen (psz_dirname) + strlen (ent) + 2];
|
|
sprintf (path, "%s"DIR_SEP"%s", psz_dirname, ent);
|
|
free (ent);
|
|
|
|
gnutls_Addx509File( p_this, cred, path, b_priv );
|
|
}
|
|
|
|
closedir( dir );
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
|
|
static int
|
|
gnutls_Addx509File( vlc_object_t *p_this,
|
|
gnutls_certificate_credentials cred,
|
|
const char *psz_path, vlc_bool_t b_priv )
|
|
{
|
|
struct stat st;
|
|
|
|
if( utf8_stat( psz_path, &st ) == 0 )
|
|
{
|
|
if( S_ISREG( st.st_mode ) )
|
|
{
|
|
char *psz_localname = ToLocale( psz_path );
|
|
int i = b_priv
|
|
? gnutls_certificate_set_x509_key_file( cred,
|
|
psz_localname, psz_localname, GNUTLS_X509_FMT_PEM )
|
|
: gnutls_certificate_set_x509_trust_file( cred,
|
|
psz_localname, GNUTLS_X509_FMT_PEM );
|
|
LocaleFree( psz_localname );
|
|
|
|
if( i < 0 )
|
|
{
|
|
msg_Warn( p_this, "cannot add x509 credentials (%s): %s",
|
|
psz_path, gnutls_strerror( i ) );
|
|
return VLC_EGENERIC;
|
|
}
|
|
else
|
|
{
|
|
msg_Dbg( p_this, "added x509 credentials (%s)",
|
|
psz_path );
|
|
return VLC_SUCCESS;
|
|
}
|
|
}
|
|
else if( S_ISDIR( st.st_mode ) )
|
|
{
|
|
msg_Dbg( p_this,
|
|
"looking recursively for x509 credentials in %s",
|
|
psz_path );
|
|
return gnutls_Addx509Directory( p_this, cred, psz_path, b_priv);
|
|
}
|
|
}
|
|
else
|
|
msg_Warn( p_this, "cannot add x509 credentials (%s): %m", psz_path );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
|
|
/** TLS client session data */
|
|
typedef struct tls_client_sys_t
|
|
{
|
|
struct tls_session_sys_t session;
|
|
gnutls_certificate_credentials_t x509_cred;
|
|
} tls_client_sys_t;
|
|
|
|
|
|
/**
|
|
* Initializes a client-side TLS session.
|
|
*/
|
|
static int OpenClient (vlc_object_t *obj)
|
|
{
|
|
tls_session_t *p_session = (tls_session_t *)obj;
|
|
int i_val;
|
|
|
|
if (gnutls_Init (obj))
|
|
return VLC_EGENERIC;
|
|
|
|
tls_client_sys_t *p_sys = malloc (sizeof (*p_sys));
|
|
if (p_sys == NULL)
|
|
{
|
|
gnutls_Deinit (obj);
|
|
return VLC_ENOMEM;
|
|
}
|
|
|
|
p_session->p_sys = &p_sys->session;
|
|
p_session->sock.p_sys = p_session;
|
|
p_session->sock.pf_send = gnutls_Send;
|
|
p_session->sock.pf_recv = gnutls_Recv;
|
|
p_session->pf_set_fd = gnutls_SetFD;
|
|
|
|
p_sys->session.b_handshaked = VLC_FALSE;
|
|
|
|
const char *homedir = obj->p_libvlc->psz_datadir,
|
|
*datadir = config_GetDataDir ();
|
|
size_t l1 = strlen (homedir), l2 = strlen (datadir);
|
|
char path[((l1 > l2) ? l1 : l2) + sizeof ("/ca-certificates.crt")];
|
|
// > sizeof ("/ssl/private")
|
|
// > sizeof ("/ssl/certs")
|
|
|
|
i_val = gnutls_certificate_allocate_credentials (&p_sys->x509_cred);
|
|
if (i_val != 0)
|
|
{
|
|
msg_Err (obj, "cannot allocate X509 credentials: %s",
|
|
gnutls_strerror (i_val));
|
|
goto error;
|
|
}
|
|
|
|
sprintf (path, "%s/ssl", homedir);
|
|
utf8_mkdir (path, 0755);
|
|
|
|
sprintf (path, "%s/ssl/certs", homedir);
|
|
gnutls_Addx509Directory (VLC_OBJECT (p_session),
|
|
p_sys->x509_cred, path, VLC_FALSE);
|
|
|
|
sprintf (path, "%s/ca-certificates.crt", datadir);
|
|
gnutls_Addx509File (VLC_OBJECT (p_session),
|
|
p_sys->x509_cred, path, VLC_FALSE);
|
|
p_session->pf_handshake = gnutls_HandshakeAndValidate;
|
|
/*p_session->pf_handshake = gnutls_ContinueHandshake;*/
|
|
|
|
sprintf (path, "%s/ssl/private", homedir);
|
|
gnutls_Addx509Directory (VLC_OBJECT (p_session), p_sys->x509_cred,
|
|
path, VLC_TRUE);
|
|
|
|
i_val = gnutls_init (&p_sys->session.session, GNUTLS_CLIENT);
|
|
if (i_val != 0)
|
|
{
|
|
msg_Err (obj, "cannot initialize TLS session: %s",
|
|
gnutls_strerror (i_val));
|
|
gnutls_certificate_free_credentials (p_sys->x509_cred);
|
|
goto error;
|
|
}
|
|
|
|
if (gnutls_SessionPrioritize (VLC_OBJECT (p_session),
|
|
p_sys->session.session))
|
|
goto s_error;
|
|
|
|
/* minimum DH prime bits */
|
|
gnutls_dh_set_prime_bits (p_sys->session.session, 1024);
|
|
|
|
i_val = gnutls_credentials_set (p_sys->session.session,
|
|
GNUTLS_CRD_CERTIFICATE,
|
|
p_sys->x509_cred);
|
|
if (i_val < 0)
|
|
{
|
|
msg_Err (obj, "cannot set TLS session credentials: %s",
|
|
gnutls_strerror (i_val));
|
|
goto s_error;
|
|
}
|
|
|
|
char *servername = var_GetNonEmptyString (p_session, "tls-server-name");
|
|
if (servername == NULL )
|
|
msg_Err (p_session, "server name missing for TLS session");
|
|
|
|
p_sys->session.psz_hostname = servername;
|
|
gnutls_server_name_set (p_sys->session.session, GNUTLS_NAME_DNS,
|
|
servername, strlen (servername));
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
s_error:
|
|
gnutls_deinit (p_sys->session.session);
|
|
gnutls_certificate_free_credentials (p_sys->x509_cred);
|
|
error:
|
|
gnutls_Deinit (obj);
|
|
free (p_sys);
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
|
|
static void CloseClient (vlc_object_t *obj)
|
|
{
|
|
tls_session_t *client = (tls_session_t *)obj;
|
|
tls_client_sys_t *p_sys = (tls_client_sys_t *)(client->p_sys);
|
|
|
|
if (p_sys->session.b_handshaked == VLC_TRUE)
|
|
gnutls_bye (p_sys->session.session, GNUTLS_SHUT_WR);
|
|
gnutls_deinit (p_sys->session.session);
|
|
/* credentials must be free'd *after* gnutls_deinit() */
|
|
gnutls_certificate_free_credentials (p_sys->x509_cred);
|
|
|
|
gnutls_Deinit (obj);
|
|
free (p_sys->session.psz_hostname);
|
|
free (p_sys);
|
|
}
|
|
|
|
|
|
/**
|
|
* Server-side TLS
|
|
*/
|
|
struct tls_server_sys_t
|
|
{
|
|
gnutls_certificate_credentials_t x509_cred;
|
|
gnutls_dh_params_t dh_params;
|
|
|
|
struct saved_session_t *p_cache;
|
|
struct saved_session_t *p_store;
|
|
int i_cache_size;
|
|
vlc_mutex_t cache_lock;
|
|
|
|
int (*pf_handshake) (tls_session_t *);
|
|
};
|
|
|
|
|
|
/**
|
|
* TLS session resumption callbacks (server-side)
|
|
*/
|
|
#define MAX_SESSION_ID 32
|
|
#define MAX_SESSION_DATA 1024
|
|
|
|
typedef struct saved_session_t
|
|
{
|
|
char id[MAX_SESSION_ID];
|
|
char data[MAX_SESSION_DATA];
|
|
|
|
unsigned i_idlen;
|
|
unsigned i_datalen;
|
|
} saved_session_t;
|
|
|
|
|
|
static int cb_store( void *p_server, gnutls_datum key, gnutls_datum data )
|
|
{
|
|
tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
|
|
|
|
if( ( p_sys->i_cache_size == 0 )
|
|
|| ( key.size > MAX_SESSION_ID )
|
|
|| ( data.size > MAX_SESSION_DATA ) )
|
|
return -1;
|
|
|
|
vlc_mutex_lock( &p_sys->cache_lock );
|
|
|
|
memcpy( p_sys->p_store->id, key.data, key.size);
|
|
memcpy( p_sys->p_store->data, data.data, data.size );
|
|
p_sys->p_store->i_idlen = key.size;
|
|
p_sys->p_store->i_datalen = data.size;
|
|
|
|
p_sys->p_store++;
|
|
if( ( p_sys->p_store - p_sys->p_cache ) == p_sys->i_cache_size )
|
|
p_sys->p_store = p_sys->p_cache;
|
|
|
|
vlc_mutex_unlock( &p_sys->cache_lock );
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static gnutls_datum cb_fetch( void *p_server, gnutls_datum key )
|
|
{
|
|
static const gnutls_datum_t err_datum = { NULL, 0 };
|
|
tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
|
|
saved_session_t *p_session, *p_end;
|
|
|
|
p_session = p_sys->p_cache;
|
|
p_end = p_session + p_sys->i_cache_size;
|
|
|
|
vlc_mutex_lock( &p_sys->cache_lock );
|
|
|
|
while( p_session < p_end )
|
|
{
|
|
if( ( p_session->i_idlen == key.size )
|
|
&& !memcmp( p_session->id, key.data, key.size ) )
|
|
{
|
|
gnutls_datum_t data;
|
|
|
|
data.size = p_session->i_datalen;
|
|
|
|
data.data = gnutls_malloc( data.size );
|
|
if( data.data == NULL )
|
|
{
|
|
vlc_mutex_unlock( &p_sys->cache_lock );
|
|
return err_datum;
|
|
}
|
|
|
|
memcpy( data.data, p_session->data, data.size );
|
|
vlc_mutex_unlock( &p_sys->cache_lock );
|
|
return data;
|
|
}
|
|
p_session++;
|
|
}
|
|
|
|
vlc_mutex_unlock( &p_sys->cache_lock );
|
|
|
|
return err_datum;
|
|
}
|
|
|
|
|
|
static int cb_delete( void *p_server, gnutls_datum key )
|
|
{
|
|
tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
|
|
saved_session_t *p_session, *p_end;
|
|
|
|
p_session = p_sys->p_cache;
|
|
p_end = p_session + p_sys->i_cache_size;
|
|
|
|
vlc_mutex_lock( &p_sys->cache_lock );
|
|
|
|
while( p_session < p_end )
|
|
{
|
|
if( ( p_session->i_idlen == key.size )
|
|
&& !memcmp( p_session->id, key.data, key.size ) )
|
|
{
|
|
p_session->i_datalen = p_session->i_idlen = 0;
|
|
vlc_mutex_unlock( &p_sys->cache_lock );
|
|
return 0;
|
|
}
|
|
p_session++;
|
|
}
|
|
|
|
vlc_mutex_unlock( &p_sys->cache_lock );
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
/**
|
|
* Terminates TLS session and releases session data.
|
|
* You still have to close the socket yourself.
|
|
*/
|
|
static void
|
|
gnutls_SessionClose (tls_server_t *p_server, tls_session_t *p_session)
|
|
{
|
|
tls_session_sys_t *p_sys = p_session->p_sys;
|
|
(void)p_server;
|
|
|
|
if( p_sys->b_handshaked == VLC_TRUE )
|
|
gnutls_bye( p_sys->session, GNUTLS_SHUT_WR );
|
|
gnutls_deinit( p_sys->session );
|
|
|
|
vlc_object_detach( p_session );
|
|
vlc_object_destroy( p_session );
|
|
|
|
free( p_sys );
|
|
}
|
|
|
|
|
|
/**
|
|
* Initializes a server-side TLS session.
|
|
*/
|
|
static tls_session_t *
|
|
gnutls_ServerSessionPrepare( tls_server_t *p_server )
|
|
{
|
|
tls_session_t *p_session;
|
|
tls_server_sys_t *p_server_sys;
|
|
gnutls_session_t session;
|
|
int i_val;
|
|
|
|
p_session = vlc_object_create( p_server, sizeof (struct tls_session_t) );
|
|
if( p_session == NULL )
|
|
return NULL;
|
|
|
|
p_session->p_sys = malloc( sizeof(struct tls_session_sys_t) );
|
|
if( p_session->p_sys == NULL )
|
|
{
|
|
vlc_object_destroy( p_session );
|
|
return NULL;
|
|
}
|
|
|
|
p_server_sys = p_server->p_sys;
|
|
p_session->sock.p_sys = p_session;
|
|
p_session->sock.pf_send = gnutls_Send;
|
|
p_session->sock.pf_recv = gnutls_Recv;
|
|
p_session->pf_set_fd = gnutls_SetFD;
|
|
p_session->pf_handshake = p_server_sys->pf_handshake;
|
|
|
|
p_session->p_sys->b_handshaked = VLC_FALSE;
|
|
p_session->p_sys->psz_hostname = NULL;
|
|
|
|
i_val = gnutls_init( &session, GNUTLS_SERVER );
|
|
if( i_val != 0 )
|
|
{
|
|
msg_Err( p_server, "cannot initialize TLS session: %s",
|
|
gnutls_strerror( i_val ) );
|
|
goto error;
|
|
}
|
|
|
|
p_session->p_sys->session = session;
|
|
|
|
if (gnutls_SessionPrioritize (VLC_OBJECT (p_session), session))
|
|
{
|
|
gnutls_deinit( session );
|
|
goto error;
|
|
}
|
|
|
|
i_val = gnutls_credentials_set( session, GNUTLS_CRD_CERTIFICATE,
|
|
p_server_sys->x509_cred );
|
|
if( i_val < 0 )
|
|
{
|
|
msg_Err( p_server, "cannot set TLS session credentials: %s",
|
|
gnutls_strerror( i_val ) );
|
|
gnutls_deinit( session );
|
|
goto error;
|
|
}
|
|
|
|
if (p_session->pf_handshake == gnutls_HandshakeAndValidate)
|
|
gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUIRE);
|
|
|
|
/* Session resumption support */
|
|
i_val = config_GetInt (p_server, "gnutls-cache-timeout");
|
|
gnutls_db_set_cache_expiration (session, i_val);
|
|
gnutls_db_set_retrieve_function( session, cb_fetch );
|
|
gnutls_db_set_remove_function( session, cb_delete );
|
|
gnutls_db_set_store_function( session, cb_store );
|
|
gnutls_db_set_ptr( session, p_server );
|
|
|
|
return p_session;
|
|
|
|
error:
|
|
free( p_session->p_sys );
|
|
vlc_object_detach( p_session );
|
|
vlc_object_destroy( p_session );
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* Adds one or more certificate authorities.
|
|
*
|
|
* @param psz_ca_path (Unicode) path to an x509 certificates list.
|
|
*
|
|
* @return -1 on error, 0 on success.
|
|
*/
|
|
static int
|
|
gnutls_ServerAddCA( tls_server_t *p_server, const char *psz_ca_path )
|
|
{
|
|
tls_server_sys_t *p_sys;
|
|
char *psz_local_path;
|
|
int val;
|
|
|
|
p_sys = (tls_server_sys_t *)(p_server->p_sys);
|
|
|
|
psz_local_path = ToLocale( psz_ca_path );
|
|
val = gnutls_certificate_set_x509_trust_file( p_sys->x509_cred,
|
|
psz_local_path,
|
|
GNUTLS_X509_FMT_PEM );
|
|
LocaleFree( psz_local_path );
|
|
if( val < 0 )
|
|
{
|
|
msg_Err( p_server, "cannot add trusted CA (%s): %s", psz_ca_path,
|
|
gnutls_strerror( val ) );
|
|
return VLC_EGENERIC;
|
|
}
|
|
msg_Dbg( p_server, " %d trusted CA added (%s)", val, psz_ca_path );
|
|
|
|
/* enables peer's certificate verification */
|
|
p_sys->pf_handshake = gnutls_HandshakeAndValidate;
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
* Adds a certificates revocation list to be sent to TLS clients.
|
|
*
|
|
* @param psz_crl_path (Unicode) path of the CRL file.
|
|
*
|
|
* @return -1 on error, 0 on success.
|
|
*/
|
|
static int
|
|
gnutls_ServerAddCRL( tls_server_t *p_server, const char *psz_crl_path )
|
|
{
|
|
int val;
|
|
char *psz_local_path = ToLocale( psz_crl_path );
|
|
|
|
val = gnutls_certificate_set_x509_crl_file( ((tls_server_sys_t *)
|
|
(p_server->p_sys))->x509_cred,
|
|
psz_local_path,
|
|
GNUTLS_X509_FMT_PEM );
|
|
LocaleFree( psz_crl_path );
|
|
if( val < 0 )
|
|
{
|
|
msg_Err( p_server, "cannot add CRL (%s): %s", psz_crl_path,
|
|
gnutls_strerror( val ) );
|
|
return VLC_EGENERIC;
|
|
}
|
|
msg_Dbg( p_server, "%d CRL added (%s)", val, psz_crl_path );
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
* Allocates a whole server's TLS credentials.
|
|
*/
|
|
static int OpenServer (vlc_object_t *obj)
|
|
{
|
|
tls_server_t *p_server = (tls_server_t *)obj;
|
|
tls_server_sys_t *p_sys;
|
|
int val;
|
|
|
|
if (gnutls_Init (obj))
|
|
return VLC_EGENERIC;
|
|
|
|
msg_Dbg (obj, "creating TLS server");
|
|
|
|
p_sys = (tls_server_sys_t *)malloc( sizeof(struct tls_server_sys_t) );
|
|
if( p_sys == NULL )
|
|
return VLC_ENOMEM;
|
|
|
|
p_sys->i_cache_size = config_GetInt (obj, "gnutls-cache-size");
|
|
p_sys->p_cache = calloc (p_sys->i_cache_size,
|
|
sizeof (struct saved_session_t));
|
|
if (p_sys->p_cache == NULL)
|
|
{
|
|
free (p_sys);
|
|
return VLC_ENOMEM;
|
|
}
|
|
|
|
p_sys->p_store = p_sys->p_cache;
|
|
p_server->p_sys = p_sys;
|
|
p_server->pf_add_CA = gnutls_ServerAddCA;
|
|
p_server->pf_add_CRL = gnutls_ServerAddCRL;
|
|
p_server->pf_open = gnutls_ServerSessionPrepare;
|
|
p_server->pf_close = gnutls_SessionClose;
|
|
|
|
/* No certificate validation by default */
|
|
p_sys->pf_handshake = gnutls_ContinueHandshake;
|
|
|
|
vlc_mutex_init( p_server, &p_sys->cache_lock );
|
|
|
|
/* Sets server's credentials */
|
|
val = gnutls_certificate_allocate_credentials( &p_sys->x509_cred );
|
|
if( val != 0 )
|
|
{
|
|
msg_Err( p_server, "cannot allocate X509 credentials: %s",
|
|
gnutls_strerror( val ) );
|
|
goto error;
|
|
}
|
|
|
|
char *psz_cert_path = var_GetNonEmptyString (obj, "tls-x509-cert");
|
|
char *psz_key_path = var_GetNonEmptyString (obj, "tls-x509-key");
|
|
const char *psz_local_cert = ToLocale (psz_cert_path);
|
|
const char *psz_local_key = ToLocale (psz_key_path);
|
|
val = gnutls_certificate_set_x509_key_file (p_sys->x509_cred,
|
|
psz_local_cert, psz_local_key,
|
|
GNUTLS_X509_FMT_PEM );
|
|
LocaleFree (psz_local_key);
|
|
free (psz_key_path);
|
|
LocaleFree (psz_local_cert);
|
|
free (psz_cert_path);
|
|
|
|
if( val < 0 )
|
|
{
|
|
msg_Err( p_server, "cannot set certificate chain or private key: %s",
|
|
gnutls_strerror( val ) );
|
|
gnutls_certificate_free_credentials( p_sys->x509_cred );
|
|
goto error;
|
|
}
|
|
|
|
/* FIXME:
|
|
* - support other ciper suites
|
|
*/
|
|
val = gnutls_dh_params_init (&p_sys->dh_params);
|
|
if (val >= 0)
|
|
{
|
|
const gnutls_datum_t data = {
|
|
.data = (unsigned char *)dh_params,
|
|
.size = sizeof (dh_params) - 1,
|
|
};
|
|
|
|
val = gnutls_dh_params_import_pkcs3 (p_sys->dh_params, &data,
|
|
GNUTLS_X509_FMT_PEM);
|
|
if (val == 0)
|
|
gnutls_certificate_set_dh_params (p_sys->x509_cred,
|
|
p_sys->dh_params);
|
|
}
|
|
if (val < 0)
|
|
{
|
|
msg_Err (p_server, "cannot initialize DHE cipher suites: %s",
|
|
gnutls_strerror (val));
|
|
}
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
error:
|
|
vlc_mutex_destroy (&p_sys->cache_lock);
|
|
free (p_sys->p_cache);
|
|
free (p_sys);
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
/**
|
|
* Destroys a TLS server object.
|
|
*/
|
|
static void CloseServer (vlc_object_t *p_server)
|
|
{
|
|
tls_server_sys_t *p_sys = ((tls_server_t *)p_server)->p_sys;
|
|
|
|
vlc_mutex_destroy (&p_sys->cache_lock);
|
|
free (p_sys->p_cache);
|
|
|
|
/* all sessions depending on the server are now deinitialized */
|
|
gnutls_certificate_free_credentials (p_sys->x509_cred);
|
|
gnutls_dh_params_deinit (p_sys->dh_params);
|
|
free (p_sys);
|
|
|
|
gnutls_Deinit (p_server);
|
|
}
|