New upstream version.

1 files changed, 237 insertions, 0 deletions

diff --git a/src/libtls/tls_writer.c b/src/libtls/tls_writer.c
new file mode 100644
index 000000000..235dc2cdf
--- /dev/null
+++ b/src/libtls/tls_writer.c
@@ -0,0 +1,237 @@
+/*
+ * 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_writer.h"
+
+typedef struct private_tls_writer_t private_tls_writer_t;
+
+/**
+ * Private data of an tls_writer_t object.
+ */
+struct private_tls_writer_t {
+
+	/**
+	 * Public tls_writer_t interface.
+	 */
+	tls_writer_t public;
+
+	/**
+	 * Allocated buffer
+	 */
+	chunk_t buf;
+
+	/**
+	 * Used bytes in buffer
+	 */
+	size_t used;
+
+	/**
+	 * Number of bytes to increase buffer size
+	 */
+	size_t increase;
+};
+
+/**
+ * Increase buffer size
+ */
+static void increase(private_tls_writer_t *this)
+{
+	this->buf.len += this->increase;
+	this->buf.ptr = realloc(this->buf.ptr, this->buf.len);
+}
+
+METHOD(tls_writer_t, write_uint8, void,
+	private_tls_writer_t *this, u_int8_t value)
+{
+	if (this->used + 1 > this->buf.len)
+	{
+		increase(this);
+	}
+	this->buf.ptr[this->used] = value;
+	this->used += 1;
+}
+
+METHOD(tls_writer_t, write_uint16, void,
+	private_tls_writer_t *this, u_int16_t value)
+{
+	if (this->used + 2 > this->buf.len)
+	{
+		increase(this);
+	}
+	htoun16(this->buf.ptr + this->used, value);
+	this->used += 2;
+}
+
+METHOD(tls_writer_t, write_uint24, void,
+	private_tls_writer_t *this, u_int32_t value)
+{
+	if (this->used + 3 > this->buf.len)
+	{
+		increase(this);
+	}
+	value = htonl(value);
+	memcpy(this->buf.ptr + this->used, ((char*)&value) + 1, 3);
+	this->used += 3;
+}
+
+METHOD(tls_writer_t, write_uint32, void,
+	private_tls_writer_t *this, u_int32_t value)
+{
+	if (this->used + 4 > this->buf.len)
+	{
+		increase(this);
+	}
+	htoun32(this->buf.ptr + this->used, value);
+	this->used += 4;
+}
+
+METHOD(tls_writer_t, write_data, void,
+	private_tls_writer_t *this, chunk_t value)
+{
+	while (this->used + value.len > this->buf.len)
+	{
+		increase(this);
+	}
+	memcpy(this->buf.ptr + this->used, value.ptr, value.len);
+	this->used += value.len;
+}
+
+METHOD(tls_writer_t, write_data8, void,
+	private_tls_writer_t *this, chunk_t value)
+{
+	write_uint8(this, value.len);
+	write_data(this, value);
+}
+
+METHOD(tls_writer_t, write_data16, void,
+	private_tls_writer_t *this, chunk_t value)
+{
+	write_uint16(this, value.len);
+	write_data(this, value);
+}
+
+METHOD(tls_writer_t, write_data24, void,
+	private_tls_writer_t *this, chunk_t value)
+{
+	write_uint24(this, value.len);
+	write_data(this, value);
+}
+
+METHOD(tls_writer_t, write_data32, void,
+	private_tls_writer_t *this, chunk_t value)
+{
+	write_uint32(this, value.len);
+	write_data(this, value);
+}
+
+METHOD(tls_writer_t, wrap8, void,
+	private_tls_writer_t *this)
+{
+	if (this->used + 1 > this->buf.len)
+	{
+		increase(this);
+	}
+	memmove(this->buf.ptr + 1, this->buf.ptr, 1);
+	this->buf.ptr[0] = this->used;
+	this->used += 1;
+}
+
+METHOD(tls_writer_t, wrap16, void,
+	private_tls_writer_t *this)
+{
+	if (this->used + 2 > this->buf.len)
+	{
+		increase(this);
+	}
+	memmove(this->buf.ptr + 2, this->buf.ptr, 2);
+	htoun16(this->buf.ptr, this->used);
+	this->used += 2;
+}
+
+METHOD(tls_writer_t, wrap24, void,
+	private_tls_writer_t *this)
+{
+	u_int32_t len;
+
+	if (this->used + 3 > this->buf.len)
+	{
+		increase(this);
+	}
+	memmove(this->buf.ptr + 3, this->buf.ptr, 3);
+
+	len = htonl(this->used);
+	memcpy(this->buf.ptr, ((char*)&len) + 1, 3);
+	this->used += 3;
+}
+
+METHOD(tls_writer_t, wrap32, void,
+	private_tls_writer_t *this)
+{
+	if (this->used + 4 > this->buf.len)
+	{
+		increase(this);
+	}
+	memmove(this->buf.ptr + 4, this->buf.ptr, 4);
+	htoun32(this->buf.ptr, this->used);
+	this->used += 4;
+}
+
+METHOD(tls_writer_t, get_buf, chunk_t,
+	private_tls_writer_t *this)
+{
+	return chunk_create(this->buf.ptr, this->used);
+}
+
+METHOD(tls_writer_t, destroy, void,
+	private_tls_writer_t *this)
+{
+	free(this->buf.ptr);
+	free(this);
+}
+
+/**
+ * See header
+ */
+tls_writer_t *tls_writer_create(u_int32_t bufsize)
+{
+	private_tls_writer_t *this;
+
+	INIT(this,
+		.public = {
+			.write_uint8 = _write_uint8,
+			.write_uint16 = _write_uint16,
+			.write_uint24 = _write_uint24,
+			.write_uint32 = _write_uint32,
+			.write_data = _write_data,
+			.write_data8 = _write_data8,
+			.write_data16 = _write_data16,
+			.write_data24 = _write_data24,
+			.write_data32 = _write_data32,
+			.wrap8 = _wrap8,
+			.wrap16 = _wrap16,
+			.wrap24 = _wrap24,
+			.wrap32 = _wrap32,
+			.get_buf = _get_buf,
+			.destroy = _destroy,
+		},
+		.increase = bufsize ?: 32,
+	);
+	if (bufsize)
+	{
+		this->buf = chunk_alloc(bufsize);
+	}
+
+	return &this->public;
+}