--- /dev/null
+/*
+ * libratbox: a library used by ircd-ratbox and other things
+ * gnutls.c: gnutls related code
+ *
+ * Copyright (C) 2007-2008 ircd-ratbox development team
+ * Copyright (C) 2007-2008 Aaron Sethman <androsyn@ratbox.org>
+ * Copyright (C) 2008 William Pitcock <nenolod@nenolod.net>
+ *
+ * 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
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
+ * USA
+ *
+ * $Id: commio.c 24808 2008-01-02 08:17:05Z androsyn $
+ */
+
+#include <libratbox_config.h>
+#include <ratbox_lib.h>
+
+#ifdef HAVE_GNUTLS
+
+#include <commio-int.h>
+#include <commio-ssl.h>
+#include <gnutls/gnutls.h>
+
+static gnutls_certificate_credentials_t x509_cred;
+static gnutls_dh_params_t dh_params;
+
+void
+rb_ssl_shutdown(rb_fde_t * F)
+{
+ if(F == NULL || F->ssl == NULL)
+ return;
+
+ gnutls_bye((gnutls_session_t) F->ssl, GNUTLS_SHUT_RDWR);
+ gnutls_deinit((gnutls_session_t) F->ssl);
+}
+
+static void
+rb_ssl_timeout(rb_fde_t * F, void *notused)
+{
+ lrb_assert(F->accept != NULL);
+ F->accept->callback(F, RB_ERR_TIMEOUT, NULL, 0, F->accept->data);
+}
+
+static void
+rb_ssl_tryaccept(rb_fde_t * F, void *data)
+{
+ int ssl_err;
+ lrb_assert(F->accept != NULL);
+ int flags;
+ struct acceptdata *ad;
+
+ if((ssl_err = gnutls_handshake((gnutls_session_t) F->ssl)) != 0)
+ {
+ switch (ssl_err)
+ {
+ case GNUTLS_E_INTERRUPTED:
+ if(rb_ignore_errno(errno))
+ case GNUTLS_E_AGAIN:
+ {
+ if(gnutls_record_get_direction((gnutls_session_t) F->ssl))
+ flags = RB_SELECT_WRITE;
+ else
+ flags = RB_SELECT_READ;
+
+ F->ssl_errno = ssl_err;
+ rb_setselect(F, flags, rb_ssl_tryaccept, NULL);
+ return;
+ }
+ break;
+ default:
+ F->ssl_errno = ssl_err;
+ F->accept->callback(F, RB_ERROR_SSL, NULL, 0, F->accept->data);
+ break;
+ }
+ return;
+ }
+ rb_settimeout(F, 0, NULL, NULL);
+ rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE, NULL, NULL);
+
+ ad = F->accept;
+ F->accept = NULL;
+ ad->callback(F, RB_OK, (struct sockaddr *) &ad->S, ad->addrlen,
+ ad->data);
+ rb_free(ad);
+}
+
+void
+rb_ssl_start_accepted(rb_fde_t * new_F, ACCB * cb, void *data, int timeout)
+{
+ gnutls_session_t sess;
+ int ssl_err;
+
+ new_F->type |= RB_FD_SSL;
+
+ gnutls_init(&sess, GNUTLS_SERVER);
+ gnutls_set_default_priority(sess);
+ gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
+ gnutls_dh_set_prime_bits(sess, 1024);
+ gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
+
+ new_F->ssl = sess;
+
+ new_F->accept = rb_malloc(sizeof(struct acceptdata));
+
+ new_F->accept->callback = cb;
+ new_F->accept->data = data;
+ rb_settimeout(new_F, timeout, rb_ssl_timeout, NULL);
+
+ new_F->accept->addrlen = 0;
+
+ gnutls_transport_set_ptr((gnutls_session_t) new_F->ssl, (gnutls_transport_ptr_t) rb_get_fd(new_F));
+
+ if((ssl_err = gnutls_handshake((gnutls_session_t) new_F->ssl)) != 0)
+ {
+ switch(ssl_err)
+ {
+ case GNUTLS_E_INTERRUPTED:
+ if(rb_ignore_errno(errno))
+ case GNUTLS_E_AGAIN:
+ {
+ int flags;
+
+ if(gnutls_record_get_direction((gnutls_session_t) new_F->ssl))
+ flags = RB_SELECT_WRITE;
+ else
+ flags = RB_SELECT_READ;
+
+ new_F->ssl_errno = ssl_err;
+ rb_setselect(new_F, flags, rb_ssl_tryaccept, NULL);
+ return;
+ }
+ break;
+ default:
+ new_F->ssl_errno = ssl_err;
+ new_F->accept->callback(new_F, RB_ERROR_SSL, NULL, 0, new_F->accept->data);
+ return;
+ }
+ }
+ else
+ {
+ struct acceptdata *ad;
+
+ rb_settimeout(new_F, 0, NULL, NULL);
+ rb_setselect(new_F, RB_SELECT_READ | RB_SELECT_WRITE, NULL, NULL);
+
+ ad = new_F->accept;
+ new_F->accept = NULL;
+ ad->callback(new_F, RB_OK, (struct sockaddr *) &ad->S, ad->addrlen,
+ ad->data);
+ rb_free(ad);
+ }
+}
+
+void
+rb_ssl_accept_setup(rb_fde_t * F, int new_fd, struct sockaddr *st, int addrlen)
+{
+ gnutls_session_t sess;
+ rb_fde_t *new_F;
+ int ssl_err;
+
+ new_F = rb_find_fd(new_fd);
+
+ gnutls_init(&sess, GNUTLS_SERVER);
+ gnutls_set_default_priority(sess);
+ gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
+ gnutls_dh_set_prime_bits(sess, 1024);
+ gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
+
+ new_F->type |= RB_FD_SSL;
+ new_F->accept = rb_malloc(sizeof(struct acceptdata));
+
+ new_F->accept->callback = F->accept->callback;
+ new_F->accept->data = F->accept->data;
+ rb_settimeout(new_F, 10, rb_ssl_timeout, NULL);
+ memcpy(&new_F->accept->S, st, addrlen);
+ new_F->accept->addrlen = addrlen;
+
+ gnutls_transport_set_ptr((gnutls_session_t) new_F->ssl, (gnutls_transport_ptr_t) rb_get_fd(new_F));
+ if((ssl_err = gnutls_handshake((gnutls_session_t) new_F->ssl)) != 0)
+ {
+ switch(ssl_err)
+ {
+ case GNUTLS_E_INTERRUPTED:
+ if(rb_ignore_errno(errno))
+ case GNUTLS_E_AGAIN:
+ {
+ int flags;
+
+ if(gnutls_record_get_direction((gnutls_session_t) new_F->ssl))
+ flags = RB_SELECT_WRITE;
+ else
+ flags = RB_SELECT_READ;
+
+ new_F->ssl_errno = ssl_err;
+ rb_setselect(new_F, flags, rb_ssl_tryaccept, NULL);
+ return;
+ }
+ break;
+ default:
+ new_F->ssl_errno = ssl_err;
+ new_F->accept->callback(new_F, RB_ERROR_SSL, NULL, 0, new_F->accept->data);
+ return;
+ }
+ }
+ else
+ {
+ struct acceptdata *ad;
+
+ rb_settimeout(new_F, 0, NULL, NULL);
+ rb_setselect(new_F, RB_SELECT_READ | RB_SELECT_WRITE, NULL, NULL);
+
+ ad = new_F->accept;
+ new_F->accept = NULL;
+ ad->callback(new_F, RB_OK, (struct sockaddr *) &ad->S, ad->addrlen,
+ ad->data);
+ rb_free(ad);
+ }
+}
+
+static ssize_t
+rb_ssl_read_or_write(int r_or_w, rb_fde_t * F, void *rbuf, const void *wbuf, size_t count)
+{
+ ssize_t ret;
+ unsigned long err;
+ gnutls_session_t ssl = F->ssl;
+
+ if(r_or_w == 0)
+ ret = gnutls_record_recv(ssl, rbuf, count);
+ else
+ ret = gnutls_record_send(ssl, wbuf, count);
+
+ if(ret < 0)
+ {
+ switch (ret)
+ {
+ case GNUTLS_E_AGAIN:
+ errno = EAGAIN;
+ if (gnutls_record_get_direction(ssl))
+ return RB_RW_SSL_NEED_WRITE;
+ else
+ return RB_RW_SSL_NEED_READ;
+ case GNUTLS_E_INTERRUPTED:
+ err = ret;
+ if(err == 0)
+ {
+ F->ssl_errno = 0;
+ return RB_RW_IO_ERROR;
+ }
+ break;
+ default:
+ err = ret;
+ break;
+ }
+ F->ssl_errno = err;
+ if(err > 0)
+ {
+ errno = EIO; /* not great but... */
+ return RB_RW_SSL_ERROR;
+ }
+ return RB_RW_IO_ERROR;
+ }
+ return ret;
+}
+
+ssize_t
+rb_ssl_read(rb_fde_t * F, void *buf, size_t count)
+{
+ return rb_ssl_read_or_write(0, F, buf, NULL, count);
+}
+
+ssize_t
+rb_ssl_write(rb_fde_t * F, const void *buf, size_t count)
+{
+ return rb_ssl_read_or_write(1, F, NULL, buf, count);
+}
+
+int
+rb_init_ssl(void)
+{
+ int ret = 1, g_ret;
+
+ gnutls_global_init();
+
+ if((g_ret = gnutls_dh_params_generate2(dh_params, 1024)) < 0)
+ {
+ rb_lib_log("rb_init_gnutls: Failed to generate GNUTLS DH params: %s", gnutls_strerror(g_ret));
+ ret = 0;
+ }
+
+ gnutls_certificate_set_dh_params(x509_cred, dh_params);
+
+ return ret;
+}
+
+int
+rb_setup_ssl_server(const char *cert, const char *keyfile, const char *dhfile)
+{
+ int ret = 0;
+
+ if((ret = gnutls_certificate_set_x509_key_file(x509_cred, cert, keyfile, GNUTLS_X509_FMT_PEM)) < 0)
+ {
+ rb_lib_log("rb_setup_ssl_server: Setting x509 keys up failed: %s", gnutls_strerror(ret));
+ return 0;
+ }
+
+ return 1;
+}
+
+int
+rb_ssl_listen(rb_fde_t * F, int backlog)
+{
+ F->type = RB_FD_SOCKET | RB_FD_LISTEN | RB_FD_SSL;
+ return listen(F->fd, backlog);
+}
+
+struct ssl_connect
+{
+ CNCB *callback;
+ void *data;
+ int timeout;
+};
+
+static void
+rb_ssl_connect_realcb(rb_fde_t * F, int status, struct ssl_connect *sconn)
+{
+ F->connect->callback = sconn->callback;
+ F->connect->data = sconn->data;
+ rb_free(sconn);
+ rb_connect_callback(F, status);
+}
+
+static void
+rb_ssl_tryconn_timeout_cb(rb_fde_t * F, void *data)
+{
+ rb_ssl_connect_realcb(F, RB_ERR_TIMEOUT, data);
+}
+
+static void
+rb_ssl_tryconn_cb(rb_fde_t * F, void *data)
+{
+ struct ssl_connect *sconn = data;
+ int ssl_err;
+
+ if((ssl_err = gnutls_handshake((gnutls_session_t) F->ssl)) != 0)
+ {
+ switch (ssl_err)
+ {
+ case GNUTLS_E_INTERRUPTED:
+ if(rb_ignore_errno(errno))
+ case GNUTLS_E_AGAIN:
+ {
+ F->ssl_errno = ssl_err;
+ rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE,
+ rb_ssl_tryconn_cb, sconn);
+ return;
+ }
+ default:
+ F->ssl_errno = ssl_err;
+ rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn);
+ return;
+ }
+ }
+ else
+ {
+ rb_ssl_connect_realcb(F, RB_OK, sconn);
+ }
+}
+
+static void
+rb_ssl_tryconn(rb_fde_t * F, int status, void *data)
+{
+ gnutls_session_t sess;
+ struct ssl_connect *sconn = data;
+ int ssl_err;
+
+ if(status != RB_OK)
+ {
+ rb_ssl_connect_realcb(F, status, sconn);
+ return;
+ }
+
+ F->type |= RB_FD_SSL;
+
+ gnutls_init(&sess, GNUTLS_CLIENT);
+ gnutls_set_default_priority(sess);
+ gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
+ gnutls_dh_set_prime_bits(sess, 1024);
+ gnutls_transport_set_ptr(sess, (gnutls_transport_ptr_t) F->fd);
+
+ F->ssl = sess;
+
+ rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn);
+ if((ssl_err = gnutls_handshake((gnutls_session_t) F->ssl)) != 0)
+ {
+ switch (ssl_err)
+ {
+ case GNUTLS_E_INTERRUPTED:
+ if(rb_ignore_errno(errno))
+ case GNUTLS_E_AGAIN:
+ {
+ F->ssl_errno = ssl_err;
+ rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE,
+ rb_ssl_tryconn_cb, sconn);
+ return;
+ }
+ default:
+ F->ssl_errno = ssl_err;
+ rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn);
+ return;
+ }
+ }
+ else
+ {
+ rb_ssl_connect_realcb(F, RB_OK, sconn);
+ }
+}
+
+void
+rb_connect_tcp_ssl(rb_fde_t * F, struct sockaddr *dest,
+ struct sockaddr *clocal, int socklen, CNCB * callback, void *data, int timeout)
+{
+ struct ssl_connect *sconn;
+ if(F == NULL)
+ return;
+
+ sconn = rb_malloc(sizeof(struct ssl_connect));
+ sconn->data = data;
+ sconn->callback = callback;
+ sconn->timeout = timeout;
+ rb_connect_tcp(F, dest, clocal, socklen, rb_ssl_tryconn, sconn, timeout);
+}
+
+void
+rb_ssl_start_connected(rb_fde_t * F, CNCB * callback, void *data, int timeout)
+{
+ gnutls_session_t sess;
+ struct ssl_connect *sconn;
+ int ssl_err;
+ if(F == NULL)
+ return;
+
+ sconn = rb_malloc(sizeof(struct ssl_connect));
+ sconn->data = data;
+ sconn->callback = callback;
+ sconn->timeout = timeout;
+ F->connect = rb_malloc(sizeof(struct conndata));
+ F->connect->callback = callback;
+ F->connect->data = data;
+ F->type |= RB_FD_SSL;
+
+ gnutls_init(&sess, GNUTLS_CLIENT);
+ gnutls_set_default_priority(sess);
+ gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
+ gnutls_dh_set_prime_bits(sess, 1024);
+ gnutls_transport_set_ptr(sess, (gnutls_transport_ptr_t) F->fd);
+
+ F->ssl = sess;
+
+ rb_settimeout(F, sconn->timeout, rb_ssl_tryconn_timeout_cb, sconn);
+ if((ssl_err = gnutls_handshake((gnutls_session_t) F->ssl)) != 0)
+ {
+ switch (ssl_err)
+ {
+ case GNUTLS_E_INTERRUPTED:
+ if(rb_ignore_errno(errno))
+ case GNUTLS_E_AGAIN:
+ {
+ F->ssl_errno = ssl_err;
+ rb_setselect(F, RB_SELECT_READ | RB_SELECT_WRITE,
+ rb_ssl_tryconn_cb, sconn);
+ return;
+ }
+ default:
+ F->ssl_errno = ssl_err;
+ rb_ssl_connect_realcb(F, RB_ERROR_SSL, sconn);
+ return;
+ }
+ }
+ else
+ {
+ rb_ssl_connect_realcb(F, RB_OK, sconn);
+ }
+}
+
+/* XXX: implement me */
+int
+rb_init_prng(const char *path, prng_seed_t seed_type)
+{
+ return -1;
+}
+
+int
+rb_get_random(void *buf, size_t length)
+{
+ return -1;
+}
+
+
+const char *
+rb_get_ssl_strerror(rb_fde_t * F)
+{
+ return gnutls_strerror(F->ssl_errno);
+}
+
+int
+rb_supports_ssl(void)
+{
+ return 1;
+}
+
+#endif /* HAVE_GNUTLS */
projects / irc / rqf / shadowircd.git / commitdiff
