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diff --git a/htp/htp_base64.h b/htp/htp_base64.h
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+/***************************************************************************
+ * Copyright (c) 2009-2010 Open Information Security Foundation
+ * Copyright (c) 2010-2013 Qualys, Inc.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+
+ * - Neither the name of the Qualys, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ ***************************************************************************/
+
+/**
+ * @file
+ * @author Ivan Ristic <ivanr@webkreator.com>
+ */
+
+/* Adapted from the libb64 project (http://sourceforge.net/projects/libb64), which is in public domain. */
+
+#ifndef _HTP_BASE64_H
+#define	_HTP_BASE64_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "bstr.h"
+
+typedef enum {
+    step_a, step_b, step_c, step_d
+} htp_base64_decodestep;
+
+typedef struct {
+    htp_base64_decodestep step;
+    char plainchar;
+} htp_base64_decoder;
+
+void htp_base64_decoder_init(htp_base64_decoder *state_in);
+
+int htp_base64_decode_single(signed char value_in);
+
+int htp_base64_decode(htp_base64_decoder *decoder, const void *code_in, int length_in, void *plaintext_out, int length_out);
+
+bstr *htp_base64_decode_bstr(bstr *input);
+
+bstr *htp_base64_decode_mem(const void *data, size_t len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _HTP_BASE64_H */
+