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+/** @file
+ * IPRT - Abstract Syntax Notation One (ASN.1) Definitions.
+ */
+
+/*
+ * Copyright (C) 2014-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+#ifndef IPRT_INCLUDED_formats_asn1_h
+#define IPRT_INCLUDED_formats_asn1_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/cdefs.h>
+
+
+/** @defgroup grp_rt_formats_asn1 ASN.1 definitions
+ * @ingroup grp_rt_formats
+ *
+ * @{ */
+
+/** @name Tag classes.
+ * @{ */
+#define ASN1_TAGCLASS_UNIVERSAL UINT8_C(0x00)
+#define ASN1_TAGCLASS_APPLICATION UINT8_C(0x40)
+#define ASN1_TAGCLASS_CONTEXT UINT8_C(0x80)
+#define ASN1_TAGCLASS_PRIVATE UINT8_C(0xc0)
+#define ASN1_TAGCLASS_MASK UINT8_C(0xc0)
+/** @} */
+
+/** Primitive encoding. */
+#define ASN1_TAGFLAG_PRIMITIVE UINT8_C(0x00)
+/** Constructed encoding, as opposed to primitive. */
+#define ASN1_TAGFLAG_CONSTRUCTED UINT8_C(0x20)
+
+/** The tag value mask. */
+#define ASN1_TAG_MASK UINT8_C(0x1f)
+
+/** @name ASN.1 universal tags.
+ * @{ */
+#define ASN1_TAG_EOC UINT8_C(0x00)
+#define ASN1_TAG_BOOLEAN UINT8_C(0x01)
+#define ASN1_TAG_INTEGER UINT8_C(0x02)
+#define ASN1_TAG_BIT_STRING UINT8_C(0x03)
+#define ASN1_TAG_OCTET_STRING UINT8_C(0x04)
+#define ASN1_TAG_NULL UINT8_C(0x05)
+#define ASN1_TAG_OID UINT8_C(0x06)
+#define ASN1_TAG_OBJECT_DESCRIPTOR UINT8_C(0x07)
+#define ASN1_TAG_EXTERNAL UINT8_C(0x08)
+#define ASN1_TAG_REAL UINT8_C(0x09)
+#define ASN1_TAG_ENUMERATED UINT8_C(0x0a)
+#define ASN1_TAG_EMBEDDED_PDV UINT8_C(0x0b)
+#define ASN1_TAG_UTF8_STRING UINT8_C(0x0c)
+#define ASN1_TAG_RELATIVE_OID UINT8_C(0x0d)
+#define ASN1_TAG_RESERVED_14 UINT8_C(0x0e)
+#define ASN1_TAG_RESERVED_15 UINT8_C(0x0f)
+#define ASN1_TAG_SEQUENCE UINT8_C(0x10)
+#define ASN1_TAG_SET UINT8_C(0x11)
+#define ASN1_TAG_NUMERIC_STRING UINT8_C(0x12)
+#define ASN1_TAG_PRINTABLE_STRING UINT8_C(0x13)
+#define ASN1_TAG_T61_STRING UINT8_C(0x14)
+#define ASN1_TAG_VIDEOTEX_STRING UINT8_C(0x15)
+#define ASN1_TAG_IA5_STRING UINT8_C(0x16)
+#define ASN1_TAG_UTC_TIME UINT8_C(0x17) /**< Century seems to be 1900 if YY < 50, otherwise 2000. Baka ASN.1! */
+#define ASN1_TAG_GENERALIZED_TIME UINT8_C(0x18)
+#define ASN1_TAG_GRAPHIC_STRING UINT8_C(0x19)
+#define ASN1_TAG_VISIBLE_STRING UINT8_C(0x1a)
+#define ASN1_TAG_GENERAL_STRING UINT8_C(0x1b)
+#define ASN1_TAG_UNIVERSAL_STRING UINT8_C(0x1c)
+#define ASN1_TAG_CHARACTER_STRING UINT8_C(0x1d)
+#define ASN1_TAG_BMP_STRING UINT8_C(0x1e)
+#define ASN1_TAG_USE_LONG_FORM UINT8_C(0x1f)
+/** @} */
+
+
+/** @} */
+
+#endif /* !IPRT_INCLUDED_formats_asn1_h */
+