2 ** Copyright (C) 2006 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
3 ** Copyright (C) 2009 Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
5 ** This program is free software; you can redistribute it and/or modify
6 ** it under the terms of the GNU General Public License as published by
7 ** the Free Software Foundation; either version 2 of the License, or
8 ** (at your option) any later version.
10 ** This program is distributed in the hope that it will be useful,
11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ** GNU General Public License for more details.
15 ** You should have received a copy of the GNU General Public License
16 ** along with this program; if not, write to the Free Software
17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include <gnutls/gnutls.h>
26 #include "hcconn_internal.h"
30 gnutls_session_t session;
37 static gnutls_anon_server_credentials_t
38 ssl_server_get_credentials (void)
40 static int initialized = 0;
41 static gnutls_anon_server_credentials_t cred;
42 gnutls_dh_params_t dh_params;
45 gnutls_dh_params_init (&dh_params);
46 gnutls_dh_params_generate2 (dh_params, DH_BITS);
47 gnutls_anon_allocate_server_credentials (&cred);
48 gnutls_anon_set_server_dh_params (cred, dh_params);
54 ssl_server_session_new (gnutls_session_t *session)
56 static gnutls_anon_server_credentials_t cred;
57 cred = ssl_server_get_credentials ();
58 gnutls_init (session, GNUTLS_SERVER);
59 gnutls_priority_set_direct (*session, "NORMAL:+ANON-DH", NULL);
60 gnutls_credentials_set (*session, GNUTLS_CRD_ANON, cred);
61 gnutls_dh_set_prime_bits (*session, DH_BITS);
66 ssl_client_session_new (gnutls_session_t *session)
68 int kx_prio[] = {GNUTLS_KX_RSA, 0};
69 gnutls_certificate_credentials cred;
70 gnutls_certificate_allocate_credentials (&cred);
71 gnutls_init (session, GNUTLS_CLIENT);
72 gnutls_set_default_priority (*session);
73 gnutls_kx_set_priority (*session, kx_prio);
74 gnutls_credentials_set (*session, GNUTLS_CRD_CERTIFICATE, cred);
77 static struct ssl_data *
78 ssl_data_new (int server)
81 ssl = g_slice_new (struct ssl_data);
83 ssl_server_session_new (&ssl->session);
85 ssl_client_session_new (&ssl->session);
86 ssl->buffer = g_string_sized_new (4096);
87 ssl->handshaking = FALSE;
92 ssl_data_destroy (struct ssl_data *ssl)
94 gnutls_deinit (ssl->session);
95 g_string_free (ssl->buffer, TRUE);
96 g_slice_free (struct ssl_data, ssl);
100 ssl_push (gnutls_transport_ptr_t ptr, const void *buffer, size_t len)
103 struct ssl_data *ssl = conn->layer;
104 hc_conn_write (ssl->lowconn, (void *) buffer, len);
109 ssl_pull (gnutls_transport_ptr_t ptr, void *buffer, size_t len)
112 struct ssl_data *ssl = conn->layer;
114 if (ssl->handshaking == TRUE)
116 r = hc_conn_read (ssl->lowconn, buffer, len);
119 if (len > ssl->buffer->len)
121 r = ssl->buffer->len;
122 memcpy (buffer, ssl->buffer->str, r);
123 g_string_truncate (ssl->buffer, 0);
128 memcpy (buffer, ssl->buffer->str, r);
129 g_string_erase (ssl->buffer, 0, r);
133 gnutls_transport_set_errno (ssl->session, EAGAIN);
140 ssl_server_handshake (struct ssl_data *ssl)
143 if ((error = gnutls_handshake (ssl->session)) < 0)
145 if (gnutls_error_is_fatal (error))
146 g_critical ("Fatal error while doing TLS handshaking: %s\n",
147 gnutls_strerror (error));
151 ssl->handshaking = FALSE;
156 ssl_server_connect (HCConn *conn)
158 struct ssl_data *ssl = conn->layer;
159 gnutls_transport_set_ptr (ssl->session, (gnutls_transport_ptr_t) conn);
160 gnutls_transport_set_push_function (ssl->session, ssl_push);
161 gnutls_transport_set_pull_function (ssl->session, ssl_pull);
162 ssl->handshaking = TRUE;
163 ssl_server_handshake (ssl);
167 hc_conn_ssl_close (gpointer data)
169 struct ssl_data *ssl = data;
172 gnutls_bye (ssl->session, GNUTLS_SHUT_RDWR);
173 hc_conn_close (ssl->lowconn);
174 ssl_data_destroy (ssl);
179 hc_conn_ssl_read (gpointer data, gchar *buffer, size_t len)
181 struct ssl_data *ssl = data;
182 return gnutls_record_recv (ssl->session, buffer, len);
186 hc_conn_ssl_write (gpointer data, gchar *buffer, size_t len)
188 struct ssl_data *ssl = data;
189 return gnutls_record_send (ssl->session, buffer, len);
193 hc_conn_ssl_watch (HCConn *conn, HCEvent event, gpointer data)
196 HCConn *ssl_conn = data;
197 struct ssl_data *ssl = ssl_conn->layer;
202 if (ssl->handshaking)
204 ssl_server_handshake (ssl);
207 while ((r = hc_conn_read (ssl->lowconn, buffer, sizeof (buffer))) > 0)
208 g_string_append_len (ssl->buffer, buffer, r);
209 if (ssl_conn->func && !ssl->handshaking)
210 ssl_conn->func (ssl_conn, event, ssl_conn->data);
214 ssl_conn->func (ssl_conn, event, ssl_conn->data);
219 hc_conn_set_driver_ssl (HCConn *conn, HCConn *lowconn, int server)
221 struct ssl_data *ssl;
222 ssl = ssl_data_new (server);
225 ssl->lowconn = lowconn;
227 conn->read = hc_conn_ssl_read;
228 conn->write = hc_conn_ssl_write;
229 conn->close = hc_conn_ssl_close;
230 hc_conn_set_callback (lowconn, hc_conn_ssl_watch, conn);
231 ssl_server_connect (conn);
236 hc_conn_set_driver_ssl_client (HCConn *conn, HCConn *lowconn)
238 return hc_conn_set_driver_ssl (conn, lowconn, 0);
242 hc_conn_set_driver_ssl_server (HCConn *conn, HCConn *lowconn)
244 return hc_conn_set_driver_ssl (conn, lowconn, 1);