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diff --git a/programs/charon/lib/asn1/ttodata.h b/programs/charon/lib/asn1/ttodata.h
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+/*
+ * convert from text form of arbitrary data (e.g., keys) to binary
+ * Copyright (C) 2000 Henry Spencer.
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library 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/lgpl.txt>.
+ *
+ * This library 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 Library General Public
+ * License for more details.
+ */
+
+#ifndef TTODATA_H_
+#define TTODATA_H_
+
+#include <types.h>
+
+#define TTODATAV_BUF 40 /* ttodatav's largest non-literal message */
+#define TTODATAV_IGNORESPACE (1<<1) /* ignore spaces in base64 encodings*/
+#define TTODATAV_SPACECOUNTS 0 /* do not ignore spaces in base64 */
+
+typedef const char *err_t; /* error message, or NULL for success */
+
+err_t ttodata(const char *src, size_t srclen, int base, char *buf, size_t buflen, size_t *needed);
+
+
+#endif /* TTODATA_H_ */