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;
38 hc_conn_ssl_server_init_credentials (char *certfile, char *keyfile)
40 static int initialized = 0;
41 static gnutls_certificate_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_certificate_allocate_credentials (&cred);
48 gnutls_certificate_set_x509_key_file (cred, certfile, keyfile,
50 gnutls_certificate_set_dh_params (cred, dh_params);
56 ssl_server_get_credentials(void)
58 return hc_conn_ssl_server_init_credentials (NULL, NULL);
62 ssl_server_session_new (gnutls_session_t *session)
65 cred = ssl_server_get_credentials ();
66 gnutls_init (session, GNUTLS_SERVER);
67 gnutls_priority_set_direct (*session, "NORMAL", NULL);
68 gnutls_credentials_set (*session, GNUTLS_CRD_CERTIFICATE, cred);
69 gnutls_dh_set_prime_bits (*session, DH_BITS);
74 ssl_client_session_new (gnutls_session_t *session)
76 int kx_prio[] = {GNUTLS_KX_RSA, 0};
77 gnutls_certificate_credentials cred;
78 gnutls_certificate_allocate_credentials (&cred);
79 gnutls_init (session, GNUTLS_CLIENT);
80 gnutls_set_default_priority (*session);
81 gnutls_kx_set_priority (*session, kx_prio);
82 gnutls_credentials_set (*session, GNUTLS_CRD_CERTIFICATE, cred);
85 static struct ssl_data *
86 ssl_data_new (int server)
89 ssl = g_slice_new (struct ssl_data);
91 ssl_server_session_new (&ssl->session);
93 ssl_client_session_new (&ssl->session);
94 ssl->buffer = g_string_sized_new (4096);
95 ssl->handshaking = FALSE;
100 ssl_data_destroy (struct ssl_data *ssl)
102 gnutls_deinit (ssl->session);
103 g_string_free (ssl->buffer, TRUE);
104 g_slice_free (struct ssl_data, ssl);
108 ssl_push (gnutls_transport_ptr_t ptr, const void *buffer, size_t len)
111 struct ssl_data *ssl = conn->layer;
112 hc_conn_write (ssl->lowconn, (void *) buffer, len);
117 ssl_pull (gnutls_transport_ptr_t ptr, void *buffer, size_t len)
120 struct ssl_data *ssl = conn->layer;
122 if (ssl->handshaking == TRUE)
124 r = hc_conn_read (ssl->lowconn, buffer, len);
127 if (len > ssl->buffer->len)
129 r = ssl->buffer->len;
130 memcpy (buffer, ssl->buffer->str, r);
131 g_string_truncate (ssl->buffer, 0);
136 memcpy (buffer, ssl->buffer->str, r);
137 g_string_erase (ssl->buffer, 0, r);
141 gnutls_transport_set_errno (ssl->session, EAGAIN);
148 ssl_server_handshake (struct ssl_data *ssl)
151 if ((error = gnutls_handshake (ssl->session)) < 0)
153 if (gnutls_error_is_fatal (error))
154 g_critical ("Fatal error while doing TLS handshaking: %s\n",
155 gnutls_strerror (error));
159 ssl->handshaking = FALSE;
164 ssl_server_connect (HCConn *conn)
166 struct ssl_data *ssl = conn->layer;
167 gnutls_transport_set_ptr (ssl->session, (gnutls_transport_ptr_t) conn);
168 gnutls_transport_set_push_function (ssl->session, ssl_push);
169 gnutls_transport_set_pull_function (ssl->session, ssl_pull);
170 ssl->handshaking = TRUE;
171 ssl_server_handshake (ssl);
175 hc_conn_ssl_close (gpointer data)
177 struct ssl_data *ssl = data;
180 gnutls_bye (ssl->session, GNUTLS_SHUT_RDWR);
181 hc_conn_close (ssl->lowconn);
182 ssl_data_destroy (ssl);
187 hc_conn_ssl_read (gpointer data, gchar *buffer, size_t len)
189 struct ssl_data *ssl = data;
190 return gnutls_record_recv (ssl->session, buffer, len);
194 hc_conn_ssl_write (gpointer data, gchar *buffer, size_t len)
196 struct ssl_data *ssl = data;
197 return gnutls_record_send (ssl->session, buffer, len);
201 hc_conn_ssl_watch (HCConn *conn, HCEvent event, gpointer data)
204 HCConn *ssl_conn = data;
205 struct ssl_data *ssl = ssl_conn->layer;
210 if (ssl->handshaking)
212 ssl_server_handshake (ssl);
215 while ((r = hc_conn_read (ssl->lowconn, buffer, sizeof (buffer))) > 0)
216 g_string_append_len (ssl->buffer, buffer, r);
217 if (ssl_conn->func && !ssl->handshaking)
218 ssl_conn->func (ssl_conn, event, ssl_conn->data);
222 ssl_conn->func (ssl_conn, event, ssl_conn->data);
227 hc_conn_set_driver_ssl (HCConn *conn, HCConn *lowconn, int server)
229 struct ssl_data *ssl;
230 ssl = ssl_data_new (server);
233 ssl->lowconn = lowconn;
235 conn->read = hc_conn_ssl_read;
236 conn->write = hc_conn_ssl_write;
237 conn->close = hc_conn_ssl_close;
238 hc_conn_set_callback (lowconn, hc_conn_ssl_watch, conn);
239 ssl_server_connect (conn);
244 hc_conn_set_driver_ssl_client (HCConn *conn, HCConn *lowconn)
246 return hc_conn_set_driver_ssl (conn, lowconn, 0);
250 hc_conn_set_driver_ssl_server (HCConn *conn, HCConn *lowconn)
252 return hc_conn_set_driver_ssl (conn, lowconn, 1);