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/********************************************************************\
* BitlBee -- An IRC to other IM-networks gateway *
* *
* Copyright 2002-2005 Wilmer van der Gaast and others *
\********************************************************************/
/* SSL module - NSS version */
/* Copyright 2005 Jelmer Vernooij */
/*
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 "bitlbee.h"
#include "proxy.h"
#include "ssl_client.h"
#include "sock.h"
#include <nspr.h>
#include <prio.h>
#include <sslproto.h>
#include <nss.h>
#include <private/pprio.h>
#include <ssl.h>
#include <secerr.h>
#include <sslerr.h>
int ssl_errno = 0;
static gboolean initialized = FALSE;
struct scd
{
ssl_input_function func;
gpointer data;
int fd;
PRFileDesc *prfd;
gboolean established;
};
static gboolean ssl_connected( gpointer data, gint source, b_input_condition cond );
static SECStatus nss_auth_cert (void *arg, PRFileDesc *socket, PRBool checksig, PRBool isserver)
{
return SECSuccess;
}
static SECStatus nss_bad_cert (void *arg, PRFileDesc *socket)
{
PRErrorCode err;
if(!arg) return SECFailure;
*(PRErrorCode *)arg = err = PORT_GetError();
switch(err) {
case SEC_ERROR_INVALID_AVA:
case SEC_ERROR_INVALID_TIME:
case SEC_ERROR_BAD_SIGNATURE:
case SEC_ERROR_EXPIRED_CERTIFICATE:
case SEC_ERROR_UNKNOWN_ISSUER:
case SEC_ERROR_UNTRUSTED_CERT:
case SEC_ERROR_CERT_VALID:
case SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE:
case SEC_ERROR_CRL_EXPIRED:
case SEC_ERROR_CRL_BAD_SIGNATURE:
case SEC_ERROR_EXTENSION_VALUE_INVALID:
case SEC_ERROR_CA_CERT_INVALID:
case SEC_ERROR_CERT_USAGES_INVALID:
case SEC_ERROR_UNKNOWN_CRITICAL_EXTENSION:
return SECSuccess;
default:
return SECFailure;
}
}
void *ssl_connect( char *host, int port, ssl_input_function func, gpointer data )
{
struct scd *conn = g_new0( struct scd, 1 );
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 )
{
PR_Init( PR_SYSTEM_THREAD, PR_PRIORITY_NORMAL, 1);
NSS_NoDB_Init(NULL);
NSS_SetDomesticPolicy();
}
return( conn );
}
static gboolean ssl_connected( gpointer data, gint source, b_input_condition cond )
{
struct scd *conn = data;
if( source == -1 )
goto ssl_connected_failure;
/* Until we find out how to handle non-blocking I/O with NSS... */
sock_make_blocking( conn->fd );
conn->prfd = SSL_ImportFD(NULL, PR_ImportTCPSocket(source));
SSL_OptionSet(conn->prfd, SSL_SECURITY, PR_TRUE);
SSL_OptionSet(conn->prfd, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE);
SSL_BadCertHook(conn->prfd, (SSLBadCertHandler)nss_bad_cert, NULL);
SSL_AuthCertificateHook(conn->prfd, (SSLAuthCertificate)nss_auth_cert, (void *)CERT_GetDefaultCertDB());
SSL_ResetHandshake(conn->prfd, PR_FALSE);
if (SSL_ForceHandshake(conn->prfd)) {
goto ssl_connected_failure;
}
conn->established = TRUE;
conn->func( conn->data, conn, cond );
return FALSE;
ssl_connected_failure:
conn->func( conn->data, NULL, cond );
PR_Close( conn -> prfd );
if( source >= 0 ) closesocket( source );
g_free( conn );
return FALSE;
}
int ssl_read( void *conn, char *buf, int len )
{
if( !((struct scd*)conn)->established )
return( 0 );
return( PR_Read( ((struct scd*)conn)->prfd, buf, len ) );
}
int ssl_write( void *conn, const char *buf, int len )
{
if( !((struct scd*)conn)->established )
return( 0 );
return( PR_Write ( ((struct scd*)conn)->prfd, buf, len ) );
}
void ssl_disconnect( void *conn_ )
{
struct scd *conn = conn_;
PR_Close( conn->prfd );
closesocket( conn->fd );
g_free( conn );
}
int ssl_getfd( void *conn )
{
return( ((struct scd*)conn)->fd );
}
b_input_condition ssl_getdirection( void *conn )
{
/* Just in case someone calls us, let's return the most likely case: */
return GAIM_INPUT_READ;
}
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