* Attempt to move the compilation of PC-Alpine to using openssl.

     Currently only the WNT port works. The WXP port will stay in
     LibreSSL, and I still need to test if the W32 port will stay with
     OpenSSL or LibreSSL.

1 files changed, 880 insertions, 0 deletions

diff --git a/libressl/include/openssl/asn1t.h b/libressl/include/openssl/asn1t.h
new file mode 100644
index 00000000..ba380bdf
--- /dev/null
+++ b/libressl/include/openssl/asn1t.h
@@ -0,0 +1,880 @@
+/* $OpenBSD: asn1t.h,v 1.14 2016/12/27 15:12:51 jsing Exp $ */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2000.
+ */
+/* ====================================================================
+ * Copyright (c) 2000-2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. 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.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+#ifndef HEADER_ASN1T_H
+#define HEADER_ASN1T_H
+
+#include <stddef.h>
+
+#include <openssl/opensslconf.h>
+
+#include <openssl/asn1.h>
+
+/* ASN1 template defines, structures and functions */
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#ifndef LIBRESSL_INTERNAL
+
+/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
+#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
+
+
+/* Macros for start and end of ASN1_ITEM definition */
+
+#define ASN1_ITEM_start(itname) \
+	const ASN1_ITEM itname##_it = {
+
+#define ASN1_ITEM_end(itname) \
+		};
+
+
+
+/* Macros to aid ASN1 template writing */
+
+#define ASN1_ITEM_TEMPLATE(tname) \
+	static const ASN1_TEMPLATE tname##_item_tt 
+
+#define ASN1_ITEM_TEMPLATE_END(tname) \
+	;\
+	ASN1_ITEM_start(tname) \
+		ASN1_ITYPE_PRIMITIVE,\
+		-1,\
+		&tname##_item_tt,\
+		0,\
+		NULL,\
+		0,\
+		#tname \
+	ASN1_ITEM_end(tname)
+
+
+/* This is a ASN1 type which just embeds a template */
+ 
+/* This pair helps declare a SEQUENCE. We can do:
+ *
+ * 	ASN1_SEQUENCE(stname) = {
+ * 		... SEQUENCE components ...
+ * 	} ASN1_SEQUENCE_END(stname)
+ *
+ * 	This will produce an ASN1_ITEM called stname_it
+ *	for a structure called stname.
+ *
+ * 	If you want the same structure but a different
+ *	name then use:
+ *
+ * 	ASN1_SEQUENCE(itname) = {
+ * 		... SEQUENCE components ...
+ * 	} ASN1_SEQUENCE_END_name(stname, itname)
+ *
+ *	This will create an item called itname_it using
+ *	a structure called stname.
+ */
+
+#define ASN1_SEQUENCE(tname) \
+	static const ASN1_TEMPLATE tname##_seq_tt[] 
+
+#define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
+
+#define ASN1_SEQUENCE_END_name(stname, tname) \
+	;\
+	ASN1_ITEM_start(tname) \
+		ASN1_ITYPE_SEQUENCE,\
+		V_ASN1_SEQUENCE,\
+		tname##_seq_tt,\
+		sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
+		NULL,\
+		sizeof(stname),\
+		#stname \
+	ASN1_ITEM_end(tname)
+
+#define ASN1_NDEF_SEQUENCE(tname) \
+	ASN1_SEQUENCE(tname)
+
+#define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
+	ASN1_SEQUENCE_cb(tname, cb)
+
+#define ASN1_SEQUENCE_cb(tname, cb) \
+	static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
+	ASN1_SEQUENCE(tname)
+
+#define ASN1_BROKEN_SEQUENCE(tname) \
+	static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
+	ASN1_SEQUENCE(tname)
+
+#define ASN1_SEQUENCE_ref(tname, cb, lck) \
+	static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
+	ASN1_SEQUENCE(tname)
+
+#define ASN1_SEQUENCE_enc(tname, enc, cb) \
+	static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
+	ASN1_SEQUENCE(tname)
+
+#define ASN1_NDEF_SEQUENCE_END(tname) \
+	;\
+	ASN1_ITEM_start(tname) \
+		ASN1_ITYPE_NDEF_SEQUENCE,\
+		V_ASN1_SEQUENCE,\
+		tname##_seq_tt,\
+		sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
+		NULL,\
+		sizeof(tname),\
+		#tname \
+	ASN1_ITEM_end(tname)
+
+#define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
+
+#define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
+
+#define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
+
+#define ASN1_SEQUENCE_END_ref(stname, tname) \
+	;\
+	ASN1_ITEM_start(tname) \
+		ASN1_ITYPE_SEQUENCE,\
+		V_ASN1_SEQUENCE,\
+		tname##_seq_tt,\
+		sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
+		&tname##_aux,\
+		sizeof(stname),\
+		#stname \
+	ASN1_ITEM_end(tname)
+
+#define ASN1_NDEF_SEQUENCE_END_cb(stname, tname) \
+	;\
+	ASN1_ITEM_start(tname) \
+		ASN1_ITYPE_NDEF_SEQUENCE,\
+		V_ASN1_SEQUENCE,\
+		tname##_seq_tt,\
+		sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
+		&tname##_aux,\
+		sizeof(stname),\
+		#stname \
+	ASN1_ITEM_end(tname)
+
+
+/* This pair helps declare a CHOICE type. We can do:
+ *
+ * 	ASN1_CHOICE(chname) = {
+ * 		... CHOICE options ...
+ * 	ASN1_CHOICE_END(chname)
+ *
+ * 	This will produce an ASN1_ITEM called chname_it
+ *	for a structure called chname. The structure
+ *	definition must look like this:
+ *	typedef struct {
+ *		int type;
+ *		union {
+ *			ASN1_SOMETHING *opt1;
+ *			ASN1_SOMEOTHER *opt2;
+ *		} value;
+ *	} chname;
+ *	
+ *	the name of the selector must be 'type'.
+ * 	to use an alternative selector name use the
+ *      ASN1_CHOICE_END_selector() version.
+ */
+
+#define ASN1_CHOICE(tname) \
+	static const ASN1_TEMPLATE tname##_ch_tt[] 
+
+#define ASN1_CHOICE_cb(tname, cb) \
+	static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
+	ASN1_CHOICE(tname)
+
+#define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
+
+#define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
+
+#define ASN1_CHOICE_END_selector(stname, tname, selname) \
+	;\
+	ASN1_ITEM_start(tname) \
+		ASN1_ITYPE_CHOICE,\
+		offsetof(stname,selname) ,\
+		tname##_ch_tt,\
+		sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
+		NULL,\
+		sizeof(stname),\
+		#stname \
+	ASN1_ITEM_end(tname)
+
+#define ASN1_CHOICE_END_cb(stname, tname, selname) \
+	;\
+	ASN1_ITEM_start(tname) \
+		ASN1_ITYPE_CHOICE,\
+		offsetof(stname,selname) ,\
+		tname##_ch_tt,\
+		sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
+		&tname##_aux,\
+		sizeof(stname),\
+		#stname \
+	ASN1_ITEM_end(tname)
+
+/* This helps with the template wrapper form of ASN1_ITEM */
+
+#define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
+	(flags), (tag), 0,\
+	#name, ASN1_ITEM_ref(type) }
+
+/* These help with SEQUENCE or CHOICE components */
+
+/* used to declare other types */
+
+#define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
+	(flags), (tag), offsetof(stname, field),\
+	#field, ASN1_ITEM_ref(type) }
+
+/* used when the structure is combined with the parent */
+
+#define ASN1_EX_COMBINE(flags, tag, type) { \
+	(flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
+
+/* implicit and explicit helper macros */
+
+#define ASN1_IMP_EX(stname, field, type, tag, ex) \
+		ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
+
+#define ASN1_EXP_EX(stname, field, type, tag, ex) \
+		ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
+
+/* Any defined by macros: the field used is in the table itself */
+
+#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
+#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
+/* Plain simple type */
+#define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
+
+/* OPTIONAL simple type */
+#define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
+
+/* IMPLICIT tagged simple type */
+#define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
+
+/* IMPLICIT tagged OPTIONAL simple type */
+#define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
+
+/* Same as above but EXPLICIT */
+
+#define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
+#define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
+
+/* SEQUENCE OF type */
+#define ASN1_SEQUENCE_OF(stname, field, type) \
+		ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
+
+/* OPTIONAL SEQUENCE OF */
+#define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
+		ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
+
+/* Same as above but for SET OF */
+
+#define ASN1_SET_OF(stname, field, type) \
+		ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
+
+#define ASN1_SET_OF_OPT(stname, field, type) \
+		ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
+
+/* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
+
+#define ASN1_IMP_SET_OF(stname, field, type, tag) \
+			ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
+
+#define ASN1_EXP_SET_OF(stname, field, type, tag) \
+			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
+
+#define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
+			ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
+
+#define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
+			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
+
+#define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
+			ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
+
+#define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
+			ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
+
+#define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
+			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
+
+#define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
+			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
+
+/* EXPLICIT using indefinite length constructed form */
+#define ASN1_NDEF_EXP(stname, field, type, tag) \
+			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
+
+/* EXPLICIT OPTIONAL using indefinite length constructed form */
+#define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
+			ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
+
+/* Macros for the ASN1_ADB structure */
+
+#define ASN1_ADB(name) \
+	static const ASN1_ADB_TABLE name##_adbtbl[] 
+
+
+#define ASN1_ADB_END(name, flags, field, app_table, def, none) \
+	;\
+	static const ASN1_ADB name##_adb = {\
+		flags,\
+		offsetof(name, field),\
+		app_table,\
+		name##_adbtbl,\
+		sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
+		def,\
+		none\
+	}
+
+
+#define ADB_ENTRY(val, template) {val, template}
+
+#define ASN1_ADB_TEMPLATE(name) \
+	static const ASN1_TEMPLATE name##_tt 
+
+#endif /* !LIBRESSL_INTERNAL */
+
+/* This is the ASN1 template structure that defines
+ * a wrapper round the actual type. It determines the
+ * actual position of the field in the value structure,
+ * various flags such as OPTIONAL and the field name.
+ */
+
+struct ASN1_TEMPLATE_st {
+unsigned long flags;		/* Various flags */
+long tag;			/* tag, not used if no tagging */
+unsigned long offset;		/* Offset of this field in structure */
+#ifndef NO_ASN1_FIELD_NAMES
+const char *field_name;		/* Field name */
+#endif
+ASN1_ITEM_EXP *item;		/* Relevant ASN1_ITEM or ASN1_ADB */
+};
+
+/* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
+
+#define ASN1_TEMPLATE_item(t) (t->item_ptr)
+#define ASN1_TEMPLATE_adb(t) (t->item_ptr)
+
+typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
+typedef struct ASN1_ADB_st ASN1_ADB;
+
+struct ASN1_ADB_st {
+	unsigned long flags;	/* Various flags */
+	unsigned long offset;	/* Offset of selector field */
+	STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
+	const ASN1_ADB_TABLE *tbl;	/* Table of possible types */
+	long tblcount;		/* Number of entries in tbl */
+	const ASN1_TEMPLATE *default_tt;  /* Type to use if no match */
+	const ASN1_TEMPLATE *null_tt;  /* Type to use if selector is NULL */
+};
+
+struct ASN1_ADB_TABLE_st {
+	long value;		/* NID for an object or value for an int */
+	const ASN1_TEMPLATE tt;		/* item for this value */
+};
+
+/* template flags */
+
+/* Field is optional */
+#define ASN1_TFLG_OPTIONAL	(0x1)
+
+/* Field is a SET OF */
+#define ASN1_TFLG_SET_OF	(0x1 << 1)
+
+/* Field is a SEQUENCE OF */
+#define ASN1_TFLG_SEQUENCE_OF	(0x2 << 1)
+
+/* Special case: this refers to a SET OF that
+ * will be sorted into DER order when encoded *and*
+ * the corresponding STACK will be modified to match
+ * the new order.
+ */
+#define ASN1_TFLG_SET_ORDER	(0x3 << 1)
+
+/* Mask for SET OF or SEQUENCE OF */
+#define ASN1_TFLG_SK_MASK	(0x3 << 1)
+
+/* These flags mean the tag should be taken from the
+ * tag field. If EXPLICIT then the underlying type
+ * is used for the inner tag.
+ */
+
+/* IMPLICIT tagging */
+#define ASN1_TFLG_IMPTAG	(0x1 << 3)
+
+
+/* EXPLICIT tagging, inner tag from underlying type */
+#define ASN1_TFLG_EXPTAG	(0x2 << 3)
+
+#define ASN1_TFLG_TAG_MASK	(0x3 << 3)
+
+/* context specific IMPLICIT */
+#define ASN1_TFLG_IMPLICIT	ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
+
+/* context specific EXPLICIT */
+#define ASN1_TFLG_EXPLICIT	ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
+
+/* If tagging is in force these determine the
+ * type of tag to use. Otherwise the tag is
+ * determined by the underlying type. These 
+ * values reflect the actual octet format.
+ */
+
+/* Universal tag */ 
+#define ASN1_TFLG_UNIVERSAL	(0x0<<6)
+/* Application tag */ 
+#define ASN1_TFLG_APPLICATION	(0x1<<6)
+/* Context specific tag */ 
+#define ASN1_TFLG_CONTEXT	(0x2<<6)
+/* Private tag */ 
+#define ASN1_TFLG_PRIVATE	(0x3<<6)
+
+#define ASN1_TFLG_TAG_CLASS	(0x3<<6)
+
+/* These are for ANY DEFINED BY type. In this case
+ * the 'item' field points to an ASN1_ADB structure
+ * which contains a table of values to decode the
+ * relevant type
+ */
+
+#define ASN1_TFLG_ADB_MASK	(0x3<<8)
+
+#define ASN1_TFLG_ADB_OID	(0x1<<8)
+
+#define ASN1_TFLG_ADB_INT	(0x1<<9)
+
+/* This flag means a parent structure is passed
+ * instead of the field: this is useful is a
+ * SEQUENCE is being combined with a CHOICE for
+ * example. Since this means the structure and
+ * item name will differ we need to use the
+ * ASN1_CHOICE_END_name() macro for example.
+ */
+
+#define ASN1_TFLG_COMBINE	(0x1<<10)
+
+/* This flag when present in a SEQUENCE OF, SET OF
+ * or EXPLICIT causes indefinite length constructed
+ * encoding to be used if required.
+ */
+
+#define ASN1_TFLG_NDEF		(0x1<<11)
+
+/* This is the actual ASN1 item itself */
+
+struct ASN1_ITEM_st {
+char itype;			/* The item type, primitive, SEQUENCE, CHOICE or extern */
+long utype;			/* underlying type */
+const ASN1_TEMPLATE *templates;	/* If SEQUENCE or CHOICE this contains the contents */
+long tcount;			/* Number of templates if SEQUENCE or CHOICE */
+const void *funcs;		/* functions that handle this type */
+long size;			/* Structure size (usually)*/
+#ifndef NO_ASN1_FIELD_NAMES
+const char *sname;		/* Structure name */
+#endif
+};
+
+/* These are values for the itype field and
+ * determine how the type is interpreted.
+ *
+ * For PRIMITIVE types the underlying type
+ * determines the behaviour if items is NULL.
+ *
+ * Otherwise templates must contain a single 
+ * template and the type is treated in the
+ * same way as the type specified in the template.
+ *
+ * For SEQUENCE types the templates field points
+ * to the members, the size field is the
+ * structure size.
+ *
+ * For CHOICE types the templates field points
+ * to each possible member (typically a union)
+ * and the 'size' field is the offset of the
+ * selector.
+ *
+ * The 'funcs' field is used for application
+ * specific functions. 
+ *
+ * The EXTERN type uses a new style d2i/i2d.
+ * The new style should be used where possible
+ * because it avoids things like the d2i IMPLICIT
+ * hack.
+ *
+ * MSTRING is a multiple string type, it is used
+ * for a CHOICE of character strings where the
+ * actual strings all occupy an ASN1_STRING
+ * structure. In this case the 'utype' field
+ * has a special meaning, it is used as a mask
+ * of acceptable types using the B_ASN1 constants.
+ *
+ * NDEF_SEQUENCE is the same as SEQUENCE except
+ * that it will use indefinite length constructed
+ * encoding if requested.
+ *
+ */
+
+#define ASN1_ITYPE_PRIMITIVE		0x0
+
+#define ASN1_ITYPE_SEQUENCE		0x1
+
+#define ASN1_ITYPE_CHOICE		0x2
+
+#define ASN1_ITYPE_EXTERN		0x4
+
+#define ASN1_ITYPE_MSTRING		0x5
+
+#define ASN1_ITYPE_NDEF_SEQUENCE	0x6
+
+/* Cache for ASN1 tag and length, so we
+ * don't keep re-reading it for things
+ * like CHOICE
+ */
+
+struct ASN1_TLC_st{
+	char valid;	/* Values below are valid */
+	int ret;	/* return value */
+	long plen;	/* length */
+	int ptag;	/* class value */
+	int pclass;	/* class value */
+	int hdrlen;	/* header length */
+};
+
+/* Typedefs for ASN1 function pointers */
+
+typedef ASN1_VALUE * ASN1_new_func(void);
+typedef void ASN1_free_func(ASN1_VALUE *a);
+typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length);
+typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
+
+typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
+					int tag, int aclass, char opt, ASN1_TLC *ctx);
+
+typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
+typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
+typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
+
+typedef int ASN1_ex_print_func(BIO *out, ASN1_VALUE **pval, 
+						int indent, const char *fname, 
+						const ASN1_PCTX *pctx);
+
+typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
+typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
+typedef int ASN1_primitive_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx);
+
+typedef struct ASN1_EXTERN_FUNCS_st {
+	void *app_data;
+	ASN1_ex_new_func *asn1_ex_new;
+	ASN1_ex_free_func *asn1_ex_free;
+	ASN1_ex_free_func *asn1_ex_clear;
+	ASN1_ex_d2i *asn1_ex_d2i;
+	ASN1_ex_i2d *asn1_ex_i2d;
+	ASN1_ex_print_func *asn1_ex_print;
+} ASN1_EXTERN_FUNCS;
+
+typedef struct ASN1_PRIMITIVE_FUNCS_st {
+	void *app_data;
+	unsigned long flags;
+	ASN1_ex_new_func *prim_new;
+	ASN1_ex_free_func *prim_free;
+	ASN1_ex_free_func *prim_clear;
+	ASN1_primitive_c2i *prim_c2i;
+	ASN1_primitive_i2c *prim_i2c;
+	ASN1_primitive_print *prim_print;
+} ASN1_PRIMITIVE_FUNCS;
+
+/* This is the ASN1_AUX structure: it handles various
+ * miscellaneous requirements. For example the use of
+ * reference counts and an informational callback.
+ *
+ * The "informational callback" is called at various
+ * points during the ASN1 encoding and decoding. It can
+ * be used to provide minor customisation of the structures
+ * used. This is most useful where the supplied routines
+ * *almost* do the right thing but need some extra help
+ * at a few points. If the callback returns zero then
+ * it is assumed a fatal error has occurred and the 
+ * main operation should be abandoned.
+ *
+ * If major changes in the default behaviour are required
+ * then an external type is more appropriate.
+ */
+
+typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it,
+				void *exarg);
+
+typedef struct ASN1_AUX_st {
+	void *app_data;
+	int flags;
+	int ref_offset;		/* Offset of reference value */
+	int ref_lock;		/* Lock type to use */
+	ASN1_aux_cb *asn1_cb;
+	int enc_offset;		/* Offset of ASN1_ENCODING structure */
+} ASN1_AUX;
+
+/* For print related callbacks exarg points to this structure */
+typedef struct ASN1_PRINT_ARG_st {
+	BIO *out;
+	int indent;
+	const ASN1_PCTX *pctx;
+} ASN1_PRINT_ARG;
+
+/* For streaming related callbacks exarg points to this structure */
+typedef struct ASN1_STREAM_ARG_st {
+	/* BIO to stream through */
+	BIO *out;
+	/* BIO with filters appended */
+	BIO *ndef_bio;
+	/* Streaming I/O boundary */
+	unsigned char **boundary;
+} ASN1_STREAM_ARG;
+
+/* Flags in ASN1_AUX */
+
+/* Use a reference count */
+#define ASN1_AFLG_REFCOUNT	1
+/* Save the encoding of structure (useful for signatures) */
+#define ASN1_AFLG_ENCODING	2
+/* The Sequence length is invalid */
+#define ASN1_AFLG_BROKEN	4
+
+/* operation values for asn1_cb */
+
+#define ASN1_OP_NEW_PRE		0
+#define ASN1_OP_NEW_POST	1
+#define ASN1_OP_FREE_PRE	2
+#define ASN1_OP_FREE_POST	3
+#define ASN1_OP_D2I_PRE		4
+#define ASN1_OP_D2I_POST	5
+#define ASN1_OP_I2D_PRE		6
+#define ASN1_OP_I2D_POST	7
+#define ASN1_OP_PRINT_PRE	8
+#define ASN1_OP_PRINT_POST	9
+#define ASN1_OP_STREAM_PRE	10
+#define ASN1_OP_STREAM_POST	11
+#define ASN1_OP_DETACHED_PRE	12
+#define ASN1_OP_DETACHED_POST	13
+
+#ifndef LIBRESSL_INTERNAL
+
+/* Macro to implement a primitive type */
+#define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
+#define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
+				ASN1_ITEM_start(itname) \
+					ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
+				ASN1_ITEM_end(itname)
+
+/* Macro to implement a multi string type */
+#define IMPLEMENT_ASN1_MSTRING(itname, mask) \
+				ASN1_ITEM_start(itname) \
+					ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
+				ASN1_ITEM_end(itname)
+#define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
+	ASN1_ITEM_start(sname) \
+		ASN1_ITYPE_EXTERN, \
+		tag, \
+		NULL, \
+		0, \
+		&fptrs, \
+		0, \
+		#sname \
+	ASN1_ITEM_end(sname)
+
+/* Macro to implement standard functions in terms of ASN1_ITEM structures */
+
+#define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
+
+#define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
+
+#define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
+			IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
+
+#define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \
+		IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname)
+
+#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
+		IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
+
+#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \
+	pre stname *fname##_new(void) \
+	{ \
+		return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
+	} \
+	pre void fname##_free(stname *a) \
+	{ \
+		ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
+	}
+
+#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
+	stname *fname##_new(void) \
+	{ \
+		return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
+	} \
+	void fname##_free(stname *a) \
+	{ \
+		ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
+	}
+
+#define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
+	IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
+	IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
+
+#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
+	stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
+	{ \
+		return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
+	} \
+	int i2d_##fname(stname *a, unsigned char **out) \
+	{ \
+		return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
+	} 
+
+#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
+	int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
+	{ \
+		return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
+	} 
+
+/* This includes evil casts to remove const: they will go away when full
+ * ASN1 constification is done.
+ */
+#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
+	stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
+	{ \
+		return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
+	} \
+	int i2d_##fname(const stname *a, unsigned char **out) \
+	{ \
+		return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
+	} 
+
+#define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
+	stname * stname##_dup(stname *x) \
+        { \
+        return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
+        }
+
+#define IMPLEMENT_ASN1_PRINT_FUNCTION(stname) \
+	IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname)
+
+#define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \
+	int fname##_print_ctx(BIO *out, stname *x, int indent, \
+						const ASN1_PCTX *pctx) \
+	{ \
+		return ASN1_item_print(out, (ASN1_VALUE *)x, indent, \
+			ASN1_ITEM_rptr(itname), pctx); \
+	} 
+
+#define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
+		IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
+
+#define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
+	IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
+	IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
+
+#endif /* !LIBRESSL_INTERNAL */
+
+/* external definitions for primitive types */
+
+extern const ASN1_ITEM ASN1_BOOLEAN_it;
+extern const ASN1_ITEM ASN1_TBOOLEAN_it;
+extern const ASN1_ITEM ASN1_FBOOLEAN_it;
+extern const ASN1_ITEM ASN1_SEQUENCE_it;
+extern const ASN1_ITEM CBIGNUM_it;
+extern const ASN1_ITEM BIGNUM_it;
+extern const ASN1_ITEM LONG_it;
+extern const ASN1_ITEM ZLONG_it;
+
+DECLARE_STACK_OF(ASN1_VALUE)
+
+/* Functions used internally by the ASN1 code */
+
+int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
+void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
+int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
+int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
+
+void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
+int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt);
+int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
+				int tag, int aclass, char opt, ASN1_TLC *ctx);
+
+int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
+int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
+void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
+
+int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
+
+int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
+int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
+
+ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
+
+const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
+
+int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
+
+void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
+void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
+int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
+int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it);
+
+#ifdef  __cplusplus
+}
+#endif
+#endif