source: lib/ssl_nss.c @ b308cf9

Last change on this file since b308cf9 was e046390, checked in by Wilmer van der Gaast <wilmer@…>, at 2009-10-10T23:25:54Z

Make purple use BitlBee's event handling API. Since the APIs never really
diverged too much this is fairly transparent. I did rename and redefine
GAIM_INPUT_* variables to really make it work without adding another stupid
layer in between.

One problem left, the new libpurple input API doesn't care about return
values. Fixing that in the next CL.

  • Property mode set to 100644
File size: 4.7 KB
Line 
1  /********************************************************************\
2  * BitlBee -- An IRC to other IM-networks gateway                     *
3  *                                                                    *
4  * Copyright 2002-2005 Wilmer van der Gaast and others                *
5  \********************************************************************/
6
7/* SSL module - NSS version                                             */
8
9/* Copyright 2005 Jelmer Vernooij                                       */
10
11/*
12  This program is free software; you can redistribute it and/or modify
13  it under the terms of the GNU General Public License as published by
14  the Free Software Foundation; either version 2 of the License, or
15  (at your option) any later version.
16
17  This program is distributed in the hope that it will be useful,
18  but WITHOUT ANY WARRANTY; without even the implied warranty of
19  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  GNU General Public License for more details.
21
22  You should have received a copy of the GNU General Public License with
23  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
24  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
25  Suite 330, Boston, MA  02111-1307  USA
26*/
27
28#include "bitlbee.h"
29#include "proxy.h"
30#include "ssl_client.h"
31#include "sock.h"
32#include <nspr.h>
33#include <prio.h>
34#include <sslproto.h>
35#include <nss.h>
36#include <private/pprio.h>
37#include <ssl.h>
38#include <secerr.h>
39#include <sslerr.h>
40
41int ssl_errno = 0;
42
43static gboolean initialized = FALSE;
44
45struct scd
46{
47        ssl_input_function func;
48        gpointer data;
49        int fd;
50        PRFileDesc *prfd;
51        gboolean established;
52};
53
54static gboolean ssl_connected( gpointer data, gint source, b_input_condition cond );
55
56
57static SECStatus nss_auth_cert (void *arg, PRFileDesc *socket, PRBool checksig, PRBool isserver)
58{
59        return SECSuccess;
60}
61
62static SECStatus nss_bad_cert (void *arg, PRFileDesc *socket) 
63{
64        PRErrorCode err;
65
66        if(!arg) return SECFailure;
67
68        *(PRErrorCode *)arg = err = PORT_GetError();
69
70        switch(err) {
71        case SEC_ERROR_INVALID_AVA:
72        case SEC_ERROR_INVALID_TIME:
73        case SEC_ERROR_BAD_SIGNATURE:
74        case SEC_ERROR_EXPIRED_CERTIFICATE:
75        case SEC_ERROR_UNKNOWN_ISSUER:
76        case SEC_ERROR_UNTRUSTED_CERT:
77        case SEC_ERROR_CERT_VALID:
78        case SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE:
79        case SEC_ERROR_CRL_EXPIRED:
80        case SEC_ERROR_CRL_BAD_SIGNATURE:
81        case SEC_ERROR_EXTENSION_VALUE_INVALID:
82        case SEC_ERROR_CA_CERT_INVALID:
83        case SEC_ERROR_CERT_USAGES_INVALID:
84        case SEC_ERROR_UNKNOWN_CRITICAL_EXTENSION:
85                return SECSuccess;
86
87        default:
88                return SECFailure;
89        }
90}
91
92
93void *ssl_connect( char *host, int port, ssl_input_function func, gpointer data )
94{
95        struct scd *conn = g_new0( struct scd, 1 );
96       
97        conn->fd = proxy_connect( host, port, ssl_connected, conn );
98        conn->func = func;
99        conn->data = data;
100       
101        if( conn->fd < 0 )
102        {
103                g_free( conn );
104                return( NULL );
105        }
106       
107        if( !initialized )
108        {
109                PR_Init( PR_SYSTEM_THREAD, PR_PRIORITY_NORMAL, 1);
110                NSS_NoDB_Init(NULL);
111                NSS_SetDomesticPolicy();
112        }
113
114       
115        return( conn );
116}
117
118static gboolean ssl_connected( gpointer data, gint source, b_input_condition cond )
119{
120        struct scd *conn = data;
121       
122        if( source == -1 )
123                goto ssl_connected_failure;
124       
125        /* Until we find out how to handle non-blocking I/O with NSS... */
126        sock_make_blocking( conn->fd );
127       
128        conn->prfd = SSL_ImportFD(NULL, PR_ImportTCPSocket(source));
129        SSL_OptionSet(conn->prfd, SSL_SECURITY, PR_TRUE);
130        SSL_OptionSet(conn->prfd, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE);
131        SSL_BadCertHook(conn->prfd, (SSLBadCertHandler)nss_bad_cert, NULL);
132        SSL_AuthCertificateHook(conn->prfd, (SSLAuthCertificate)nss_auth_cert, (void *)CERT_GetDefaultCertDB());
133        SSL_ResetHandshake(conn->prfd, PR_FALSE);
134
135        if (SSL_ForceHandshake(conn->prfd)) {
136                goto ssl_connected_failure;
137        }
138       
139       
140        conn->established = TRUE;
141        conn->func( conn->data, conn, cond );
142        return FALSE;
143       
144        ssl_connected_failure:
145       
146        conn->func( conn->data, NULL, cond );
147       
148        PR_Close( conn -> prfd );
149        if( source >= 0 ) closesocket( source );
150        g_free( conn );
151       
152        return FALSE;
153}
154
155int ssl_read( void *conn, char *buf, int len )
156{
157        if( !((struct scd*)conn)->established )
158                return( 0 );
159       
160        return( PR_Read( ((struct scd*)conn)->prfd, buf, len ) );
161}
162
163int ssl_write( void *conn, const char *buf, int len )
164{
165        if( !((struct scd*)conn)->established )
166                return( 0 );
167       
168        return( PR_Write ( ((struct scd*)conn)->prfd, buf, len ) );
169}
170
171/* See ssl_openssl.c for an explanation. */
172int ssl_pending( void *conn )
173{
174        return 0;
175}
176
177void ssl_disconnect( void *conn_ )
178{
179        struct scd *conn = conn_;
180       
181        PR_Close( conn->prfd );
182        closesocket( conn->fd );
183       
184        g_free( conn );
185}
186
187int ssl_getfd( void *conn )
188{
189        return( ((struct scd*)conn)->fd );
190}
191
192b_input_condition ssl_getdirection( void *conn )
193{
194        /* Just in case someone calls us, let's return the most likely case: */
195        return B_EV_IO_READ;
196}
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