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/********************************************************************\
* BitlBee -- An IRC to other IM-networks gateway *
* *
* Copyright 2002-2004 Wilmer van der Gaast and others *
\********************************************************************/
/* SSL module - OpenSSL version */
/*
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 with
the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
if not, write to the Free Software Foundation, Inc., 59 Temple Place,
Suite 330, Boston, MA 02111-1307 USA
*/
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include "proxy.h"
#include "ssl_client.h"
#include "sock.h"
int ssl_errno = 0;
static gboolean initialized = FALSE;
struct scd
{
ssl_input_function func;
gpointer data;
int fd;
gboolean established;
int inpa;
int lasterr; /* Necessary for SSL_get_error */
SSL *ssl;
SSL_CTX *ssl_ctx;
};
static gboolean ssl_connected( gpointer data, gint source, b_input_condition cond );
void *ssl_connect( char *host, int port, ssl_input_function func, gpointer data )
{
struct scd *conn = g_new0( struct scd, 1 );
SSL_METHOD *meth;
conn->fd = proxy_connect( host, port, ssl_connected, conn );
conn->func = func;
conn->data = data;
if( conn->fd < 0 )
{
g_free( conn );
return( NULL );
}
if( !initialized )
{
initialized = TRUE;
SSLeay_add_ssl_algorithms();
}
meth = TLSv1_client_method();
conn->ssl_ctx = SSL_CTX_new( meth );
if( conn->ssl_ctx == NULL )
{
conn->fd = -1;
return( NULL );
}
conn->ssl = SSL_new( conn->ssl_ctx );
if( conn->ssl == NULL )
{
conn->fd = -1;
return( NULL );
}
return( conn );
}
static gboolean ssl_handshake( gpointer data, gint source, b_input_condition cond );
static gboolean ssl_connected( gpointer data, gint source, b_input_condition cond )
{
struct scd *conn = data;
if( source == -1 )
return ssl_handshake( data, -1, cond );
/* We can do at least the handshake with non-blocking I/O */
sock_make_nonblocking( conn->fd );
SSL_set_fd( conn->ssl, conn->fd );
return ssl_handshake( data, source, cond );
}
static gboolean ssl_handshake( gpointer data, gint source, b_input_condition cond )
{
struct scd *conn = data;
int st;
if( ( st = SSL_connect( conn->ssl ) ) < 0 )
{
conn->lasterr = SSL_get_error( conn->ssl, st );
if( conn->lasterr != SSL_ERROR_WANT_READ && conn->lasterr != SSL_ERROR_WANT_WRITE )
goto ssl_connected_failure;
conn->inpa = b_input_add( conn->fd, ssl_getdirection( conn ), ssl_handshake, data );
return FALSE;
}
conn->established = TRUE;
sock_make_blocking( conn->fd ); /* For now... */
conn->func( conn->data, conn, cond );
return FALSE;
ssl_connected_failure:
conn->func( conn->data, NULL, cond );
if( conn->ssl )
{
SSL_shutdown( conn->ssl );
SSL_free( conn->ssl );
}
if( conn->ssl_ctx )
{
SSL_CTX_free( conn->ssl_ctx );
}
if( source >= 0 ) closesocket( source );
g_free( conn );
return FALSE;
}
int ssl_read( void *conn, char *buf, int len )
{
int st;
if( !((struct scd*)conn)->established )
{
ssl_errno = SSL_NOHANDSHAKE;
return -1;
}
st = SSL_read( ((struct scd*)conn)->ssl, buf, len );
ssl_errno = SSL_OK;
if( st <= 0 )
{
((struct scd*)conn)->lasterr = SSL_get_error( ((struct scd*)conn)->ssl, st );
if( ((struct scd*)conn)->lasterr == SSL_ERROR_WANT_READ || ((struct scd*)conn)->lasterr == SSL_ERROR_WANT_WRITE )
ssl_errno = SSL_AGAIN;
}
return st;
}
int ssl_write( void *conn, const char *buf, int len )
{
int st;
if( !((struct scd*)conn)->established )
{
ssl_errno = SSL_NOHANDSHAKE;
return -1;
}
st = SSL_write( ((struct scd*)conn)->ssl, buf, len );
ssl_errno = SSL_OK;
if( st <= 0 )
{
((struct scd*)conn)->lasterr = SSL_get_error( ((struct scd*)conn)->ssl, st );
if( ((struct scd*)conn)->lasterr == SSL_ERROR_WANT_READ || ((struct scd*)conn)->lasterr == SSL_ERROR_WANT_WRITE )
ssl_errno = SSL_AGAIN;
}
return st;
}
void ssl_disconnect( void *conn_ )
{
struct scd *conn = conn_;
if( conn->inpa != -1 )
b_event_remove( conn->inpa );
if( conn->established )
SSL_shutdown( conn->ssl );
closesocket( conn->fd );
SSL_free( conn->ssl );
SSL_CTX_free( conn->ssl_ctx );
g_free( conn );
}
int ssl_getfd( void *conn )
{
return( ((struct scd*)conn)->fd );
}
b_input_condition ssl_getdirection( void *conn )
{
return( ((struct scd*)conn)->lasterr == SSL_ERROR_WANT_WRITE ? GAIM_INPUT_WRITE : GAIM_INPUT_READ );
}
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