--- /dev/null
+/*
+ * Copyright (C) 2010 Martin Willi
+ * Copyright (C) 2010 revosec AG
+ *
+ * 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. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+#include "tls_socket.h"
+
+#include <unistd.h>
+
+#include <debug.h>
+
+typedef struct private_tls_socket_t private_tls_socket_t;
+typedef struct private_tls_application_t private_tls_application_t;
+
+struct private_tls_application_t {
+
+ /**
+ * Implements tls_application layer.
+ */
+ tls_application_t application;
+
+ /**
+ * Chunk of data to send
+ */
+ chunk_t out;
+
+ /**
+ * Chunk of data received
+ */
+ chunk_t in;
+};
+
+/**
+ * Private data of an tls_socket_t object.
+ */
+struct private_tls_socket_t {
+
+ /**
+ * Public tls_socket_t interface.
+ */
+ tls_socket_t public;
+
+ /**
+ * TLS application implementation
+ */
+ private_tls_application_t app;
+
+ /**
+ * TLS stack
+ */
+ tls_t *tls;
+
+ /**
+ * Underlying OS socket
+ */
+ int fd;
+};
+
+METHOD(tls_application_t, process, status_t,
+ private_tls_application_t *this, tls_reader_t *reader)
+{
+ chunk_t data;
+
+ if (!reader->read_data(reader, reader->remaining(reader), &data))
+ {
+ return FAILED;
+ }
+ this->in = chunk_cat("mc", this->in, data);
+ return NEED_MORE;
+}
+
+METHOD(tls_application_t, build, status_t,
+ private_tls_application_t *this, tls_writer_t *writer)
+{
+ if (this->out.len)
+ {
+ writer->write_data(writer, this->out);
+ this->out = chunk_empty;
+ return NEED_MORE;
+ }
+ return INVALID_STATE;
+}
+
+/**
+ * TLS data exchange loop
+ */
+static bool exchange(private_tls_socket_t *this, bool wr)
+{
+ chunk_t data;
+ char buf[2048];
+ ssize_t len;
+ int round = 0;
+
+ for (round = 0; TRUE; round++)
+ {
+ if (this->tls->build(this->tls, &data) != NEED_MORE)
+ {
+ return FALSE;
+ }
+ if (data.len)
+ {
+ len = write(this->fd, data.ptr, data.len);
+ free(data.ptr);
+ if (len != data.len)
+ {
+ return FALSE;
+ }
+ }
+ if (wr)
+ {
+ if (this->app.out.len == 0)
+ { /* all data written */
+ return TRUE;
+ }
+ }
+ else
+ {
+ if (this->app.in.len)
+ { /* some data received */
+ return TRUE;
+ }
+ if (round > 0)
+ { /* did some handshaking, return empty chunk to not block */
+ return TRUE;
+ }
+ }
+ len = read(this->fd, buf, sizeof(buf));
+ if (len <= 0)
+ {
+ return FALSE;
+ }
+ if (this->tls->process(this->tls, chunk_create(buf, len)) != NEED_MORE)
+ {
+ return FALSE;
+ }
+ }
+}
+
+METHOD(tls_socket_t, read_, bool,
+ private_tls_socket_t *this, chunk_t *buf)
+{
+ if (exchange(this, FALSE))
+ {
+ *buf = this->app.in;
+ this->app.in = chunk_empty;
+ return TRUE;
+ }
+ return FALSE;
+}
+
+METHOD(tls_socket_t, write_, bool,
+ private_tls_socket_t *this, chunk_t buf)
+{
+ this->app.out = buf;
+ if (exchange(this, TRUE))
+ {
+ return TRUE;
+ }
+ return FALSE;
+}
+
+METHOD(tls_socket_t, destroy, void,
+ private_tls_socket_t *this)
+{
+ this->tls->destroy(this->tls);
+ free(this->app.in.ptr);
+ free(this);
+}
+
+/**
+ * See header
+ */
+tls_socket_t *tls_socket_create(bool is_server, identification_t *server,
+ identification_t *peer, int fd)
+{
+ private_tls_socket_t *this;
+
+ INIT(this,
+ .public = {
+ .read = _read_,
+ .write = _write_,
+ .destroy = _destroy,
+ },
+ .app = {
+ .application = {
+ .build = _build,
+ .process = _process,
+ .destroy = (void*)nop,
+ },
+ },
+ .fd = fd,
+ );
+
+ this->tls = tls_create(is_server, server, peer, TLS_PURPOSE_GENERIC,
+ &this->app.application);
+ if (!this->tls)
+ {
+ free(this);
+ return NULL;
+ }
+
+ return &this->public;
+}
--- /dev/null
+/*
+ * Copyright (C) 2010 Martin Willi
+ * Copyright (C) 2010 revosec AG
+ *
+ * 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. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup tls_socket tls_socket
+ * @{ @ingroup libtls
+ */
+
+#ifndef TLS_SOCKET_H_
+#define TLS_SOCKET_H_
+
+#include "tls.h"
+
+typedef struct tls_socket_t tls_socket_t;
+
+/**
+ * TLS secured socket.
+ *
+ * Wraps a blocking (socket) file descriptor for a reliable transport into a
+ * TLS secured socket. TLS negotiation happens on demand, certificates and
+ * private keys are fetched from any registered credential set.
+ */
+struct tls_socket_t {
+
+ /**
+ * Read data from secured socket, return allocated chunk.
+ *
+ * This call is blocking, you may use select() on the underlying socket to
+ * wait for data. If the there was non-application data available, the
+ * read function can return an empty chunk.
+ *
+ * @param data pointer to allocate received data
+ * @return TRUE if data received successfully
+ */
+ bool (*read)(tls_socket_t *this, chunk_t *data);
+
+ /**
+ * Write a chunk of data over the secured socket.
+ *
+ * @param data data to send
+ * @return TRUE if data sent successfully
+ */
+ bool (*write)(tls_socket_t *this, chunk_t data);
+
+ /**
+ * Destroy a tls_socket_t.
+ */
+ void (*destroy)(tls_socket_t *this);
+};
+
+/**
+ * Create a tls_socket instance.
+ *
+ * @param is_server TRUE to act as TLS server
+ * @param server server identity
+ * @param peer client identity, NULL for no client authentication
+ * @param fd socket to read/write from
+ * @return TLS socket wrapper
+ */
+tls_socket_t *tls_socket_create(bool is_server, identification_t *server,
+ identification_t *peer, int fd);
+
+#endif /** TLS_SOCKET_H_ @}*/
projects / people / ms / strongswan.git / commitdiff
