libtasn1: Import libtasn1-4.19.0

Import a very trimmed-down set of libtasn1 files:

  curl -L -O https://ftp.gnu.org/gnu/libtasn1/libtasn1-4.19.0.tar.gz
  tar xvzf libtasn1-4.19.0.tar.gz
  rm -rf grub-core/lib/libtasn1
  mkdir -p grub-core/lib/libtasn1/lib
  mkdir -p grub-core/lib/libtasn1/tests
  cp libtasn1-4.19.0/{README.md,COPYING} grub-core/lib/libtasn1
  cp libtasn1-4.19.0/lib/{coding.c,decoding.c,element.c,element.h,errors.c,gstr.c,gstr.h,int.h,parser_aux.c,parser_aux.h,structure.c,structure.h} grub-core/libtasn1/lib
  cp libtasn1-4.19.0/lib/includes/libtasn1.h grub-core/lib/libtasn1
  cp libtasn1-4.19.0/tests/{CVE-2018-1000654-1_asn1_tab.h,CVE-2018-1000654-2_asn1_tab.h,CVE-2018-1000654.c,object-id-decoding.c,object-id-encoding.c,octet-string.c,reproducers.c,Test_overflow.c,Test_simple.c,Test_strings.c} grub-core/lib/libtasn1/tests
  rm -rf libtasn1-4.19.0*

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Tested-by: Stefan Berger <stefanb@linux.ibm.com>

grub-core/lib/libtasn1/lib/element.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2000-2022 Free Software Foundation, Inc.
+ *
+ * This file is part of LIBTASN1.
+ *
+ * The LIBTASN1 library is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef _ELEMENT_H
+# define _ELEMENT_H
+
+
+struct node_tail_cache_st
+{
+  asn1_node head;		/* the first element of the sequence */
+  asn1_node tail;
+};
+
+int _asn1_append_sequence_set (asn1_node node,
+			       struct node_tail_cache_st *pcached);
+
+int _asn1_convert_integer (const unsigned char *value,
+			   unsigned char *value_out,
+			   int value_out_size, int *len);
+
+void _asn1_hierarchical_name (asn1_node_const node, char *name,
+			      int name_size);
+
+#endif

grub-core/lib/libtasn1/lib/errors.c

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2002-2022 Free Software Foundation, Inc.
+ *
+ * This file is part of LIBTASN1.
+ *
+ * The LIBTASN1 library is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <int.h>
+#ifdef STDC_HEADERS
+# include <stdarg.h>
+#endif
+
+#define LIBTASN1_ERROR_ENTRY(name) { #name, name }
+
+struct libtasn1_error_entry
+{
+  const char *name;
+  int number;
+};
+typedef struct libtasn1_error_entry libtasn1_error_entry;
+
+static const libtasn1_error_entry error_algorithms[] = {
+  LIBTASN1_ERROR_ENTRY (ASN1_SUCCESS),
+  LIBTASN1_ERROR_ENTRY (ASN1_FILE_NOT_FOUND),
+  LIBTASN1_ERROR_ENTRY (ASN1_ELEMENT_NOT_FOUND),
+  LIBTASN1_ERROR_ENTRY (ASN1_IDENTIFIER_NOT_FOUND),
+  LIBTASN1_ERROR_ENTRY (ASN1_DER_ERROR),
+  LIBTASN1_ERROR_ENTRY (ASN1_VALUE_NOT_FOUND),
+  LIBTASN1_ERROR_ENTRY (ASN1_GENERIC_ERROR),
+  LIBTASN1_ERROR_ENTRY (ASN1_VALUE_NOT_VALID),
+  LIBTASN1_ERROR_ENTRY (ASN1_TAG_ERROR),
+  LIBTASN1_ERROR_ENTRY (ASN1_TAG_IMPLICIT),
+  LIBTASN1_ERROR_ENTRY (ASN1_ERROR_TYPE_ANY),
+  LIBTASN1_ERROR_ENTRY (ASN1_SYNTAX_ERROR),
+  LIBTASN1_ERROR_ENTRY (ASN1_MEM_ERROR),
+  LIBTASN1_ERROR_ENTRY (ASN1_MEM_ALLOC_ERROR),
+  LIBTASN1_ERROR_ENTRY (ASN1_DER_OVERFLOW),
+  LIBTASN1_ERROR_ENTRY (ASN1_NAME_TOO_LONG),
+  LIBTASN1_ERROR_ENTRY (ASN1_ARRAY_ERROR),
+  LIBTASN1_ERROR_ENTRY (ASN1_ELEMENT_NOT_EMPTY),
+  LIBTASN1_ERROR_ENTRY (ASN1_TIME_ENCODING_ERROR),
+  LIBTASN1_ERROR_ENTRY (ASN1_RECURSION),
+  {0, 0}
+};
+
+/**
+ * asn1_perror:
+ * @error: is an error returned by a libtasn1 function.
+ *
+ * Prints a string to stderr with a description of an error.  This
+ * function is like perror().  The only difference is that it accepts
+ * an error returned by a libtasn1 function.
+ *
+ * Since: 1.6
+ **/
+void
+asn1_perror (int error)
+{
+  const char *str = asn1_strerror (error);
+  fprintf (stderr, "LIBTASN1 ERROR: %s\n", str ? str : "(null)");
+}
+
+/**
+ * asn1_strerror:
+ * @error: is an error returned by a libtasn1 function.
+ *
+ * Returns a string with a description of an error.  This function is
+ * similar to strerror.  The only difference is that it accepts an
+ * error (number) returned by a libtasn1 function.
+ *
+ * Returns: Pointer to static zero-terminated string describing error
+ *   code.
+ *
+ * Since: 1.6
+ **/
+const char *
+asn1_strerror (int error)
+{
+  const libtasn1_error_entry *p;
+
+  for (p = error_algorithms; p->name != NULL; p++)
+    if (p->number == error)
+      return p->name + sizeof ("ASN1_") - 1;
+
+  return NULL;
+}

grub-core/lib/libtasn1/lib/gstr.c

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2002-2022 Free Software Foundation, Inc.
+ *
+ * This file is part of LIBTASN1.
+ *
+ * The LIBTASN1 library is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <int.h>
+#include "gstr.h"
+
+/* These function are like strcat, strcpy. They only
+ * do bounds checking (they shouldn't cause buffer overruns),
+ * and they always produce null terminated strings.
+ *
+ * They should be used only with null terminated strings.
+ */
+void
+_asn1_str_cat (char *dest, size_t dest_tot_size, const char *src)
+{
+  size_t str_size = strlen (src);
+  size_t dest_size = strlen (dest);
+
+  if (dest_tot_size - dest_size > str_size)
+    {
+      strcat (dest, src);
+    }
+  else
+    {
+      if (dest_tot_size > dest_size)
+	{
+	  strncat (dest, src, (dest_tot_size - dest_size) - 1);
+	  dest[dest_tot_size - 1] = 0;
+	}
+    }
+}
+
+/* Returns the bytes copied (not including the null terminator) */
+unsigned int
+_asn1_str_cpy (char *dest, size_t dest_tot_size, const char *src)
+{
+  size_t str_size = strlen (src);
+
+  if (dest_tot_size > str_size)
+    {
+      strcpy (dest, src);
+      return str_size;
+    }
+  else
+    {
+      if (dest_tot_size > 0)
+	{
+	  str_size = dest_tot_size - 1;
+	  memcpy (dest, src, str_size);
+	  dest[str_size] = 0;
+	  return str_size;
+	}
+      else
+	return 0;
+    }
+}

grub-core/lib/libtasn1/lib/gstr.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2002-2022 Free Software Foundation, Inc.
+ *
+ * This file is part of LIBTASN1.
+ *
+ * The LIBTASN1 library is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef GSTR_H
+# define GSTR_H
+
+unsigned int _asn1_str_cpy (char *dest, size_t dest_tot_size,
+			    const char *src);
+void _asn1_str_cat (char *dest, size_t dest_tot_size, const char *src);
+
+# define Estrcpy(x,y) _asn1_str_cpy(x,ASN1_MAX_ERROR_DESCRIPTION_SIZE,y)
+# define Estrcat(x,y) _asn1_str_cat(x,ASN1_MAX_ERROR_DESCRIPTION_SIZE,y)
+
+inline static void
+safe_memset (void *data, int c, size_t size)
+{
+  volatile unsigned volatile_zero = 0;
+  volatile char *vdata = (volatile char *) data;
+
+  /* This is based on a nice trick for safe memset,
+   * sent by David Jacobson in the openssl-dev mailing list.
+   */
+
+  if (size > 0)
+    do
+      {
+	memset (data, c, size);
+      }
+    while (vdata[volatile_zero] != c);
+}
+
+#endif /* GSTR_H */

grub-core/lib/libtasn1/lib/int.h

@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2002-2022 Free Software Foundation, Inc.
+ *
+ * This file is part of LIBTASN1.
+ *
+ * The LIBTASN1 library is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef INT_H
+# define INT_H
+
+# ifdef HAVE_CONFIG_H
+#  include <config.h>
+# endif
+
+# include <string.h>
+# include <stdlib.h>
+# include <stdio.h>
+# include <stdint.h>
+
+# ifdef HAVE_SYS_TYPES_H
+#  include <sys/types.h>
+# endif
+
+# include <libtasn1.h>
+
+# define ASN1_SMALL_VALUE_SIZE 16
+
+/* This structure is also in libtasn1.h, but then contains less
+   fields.  You cannot make any modifications to these first fields
+   without breaking ABI.  */
+struct asn1_node_st
+{
+  /* public fields: */
+  char name[ASN1_MAX_NAME_SIZE + 1];	/* Node name */
+  unsigned int name_hash;
+  unsigned int type;		/* Node type */
+  unsigned char *value;		/* Node value */
+  int value_len;
+  asn1_node down;		/* Pointer to the son node */
+  asn1_node right;		/* Pointer to the brother node */
+  asn1_node left;		/* Pointer to the next list element */
+  /* private fields: */
+  unsigned char small_value[ASN1_SMALL_VALUE_SIZE];	/* For small values */
+
+  /* values used during decoding/coding */
+  int tmp_ival;
+  unsigned start;		/* the start of the DER sequence - if decoded */
+  unsigned end;			/* the end of the DER sequence - if decoded */
+};
+
+typedef struct tag_and_class_st
+{
+  unsigned tag;
+  unsigned class;
+  const char *desc;
+} tag_and_class_st;
+
+/* the types that are handled in _asn1_tags */
+# define CASE_HANDLED_ETYPES \
+	case ASN1_ETYPE_NULL: \
+	case ASN1_ETYPE_BOOLEAN: \
+	case ASN1_ETYPE_INTEGER: \
+	case ASN1_ETYPE_ENUMERATED: \
+	case ASN1_ETYPE_OBJECT_ID: \
+	case ASN1_ETYPE_OCTET_STRING: \
+	case ASN1_ETYPE_GENERALSTRING: \
+        case ASN1_ETYPE_NUMERIC_STRING: \
+        case ASN1_ETYPE_IA5_STRING: \
+        case ASN1_ETYPE_TELETEX_STRING: \
+        case ASN1_ETYPE_PRINTABLE_STRING: \
+        case ASN1_ETYPE_UNIVERSAL_STRING: \
+        case ASN1_ETYPE_BMP_STRING: \
+        case ASN1_ETYPE_UTF8_STRING: \
+        case ASN1_ETYPE_VISIBLE_STRING: \
+	case ASN1_ETYPE_BIT_STRING: \
+	case ASN1_ETYPE_SEQUENCE: \
+	case ASN1_ETYPE_SEQUENCE_OF: \
+	case ASN1_ETYPE_SET: \
+	case ASN1_ETYPE_UTC_TIME: \
+	case ASN1_ETYPE_GENERALIZED_TIME: \
+	case ASN1_ETYPE_SET_OF
+
+# define ETYPE_TAG(etype) (_asn1_tags[etype].tag)
+# define ETYPE_CLASS(etype) (_asn1_tags[etype].class)
+# define ETYPE_OK(etype) (((etype) != ASN1_ETYPE_INVALID && \
+                          (etype) < _asn1_tags_size && \
+                          _asn1_tags[(etype)].desc != NULL)?1:0)
+
+# define ETYPE_IS_STRING(etype) ((etype == ASN1_ETYPE_GENERALSTRING || \
+	etype == ASN1_ETYPE_NUMERIC_STRING || etype == ASN1_ETYPE_IA5_STRING || \
+	etype == ASN1_ETYPE_TELETEX_STRING || etype == ASN1_ETYPE_PRINTABLE_STRING || \
+	etype == ASN1_ETYPE_UNIVERSAL_STRING || etype == ASN1_ETYPE_BMP_STRING || \
+	etype == ASN1_ETYPE_UTF8_STRING || etype == ASN1_ETYPE_VISIBLE_STRING || \
+	etype == ASN1_ETYPE_OCTET_STRING)?1:0)
+
+extern unsigned int _asn1_tags_size;
+extern const tag_and_class_st _asn1_tags[];
+
+# define _asn1_strlen(s) strlen((const char *) s)
+# define _asn1_strtol(n,e,b) strtol((const char *) n, e, b)
+# define _asn1_strtoul(n,e,b) strtoul((const char *) n, e, b)
+# define _asn1_strcmp(a,b) strcmp((const char *)a, (const char *)b)
+# define _asn1_strcpy(a,b) strcpy((char *)a, (const char *)b)
+# define _asn1_strcat(a,b) strcat((char *)a, (const char *)b)
+
+# if SIZEOF_UNSIGNED_LONG_INT == 8
+#  define _asn1_strtou64(n,e,b) strtoul((const char *) n, e, b)
+# else
+#  define _asn1_strtou64(n,e,b) strtoull((const char *) n, e, b)
+# endif
+
+# define MAX_LOG_SIZE 1024	/* maximum number of characters of a log message */
+
+/* Define used for visiting trees. */
+# define UP     1
+# define RIGHT  2
+# define DOWN   3
+
+/***********************************************************************/
+/* List of constants to better specify the type of typedef asn1_node_st.   */
+/***********************************************************************/
+/*  Used with TYPE_TAG  */
+# define CONST_UNIVERSAL   (1U<<8)
+# define CONST_PRIVATE     (1U<<9)
+# define CONST_APPLICATION (1U<<10)
+# define CONST_EXPLICIT    (1U<<11)
+# define CONST_IMPLICIT    (1U<<12)
+
+# define CONST_TAG         (1U<<13)	/*  Used in ASN.1 assignement  */
+# define CONST_OPTION      (1U<<14)
+# define CONST_DEFAULT     (1U<<15)
+# define CONST_TRUE        (1U<<16)
+# define CONST_FALSE       (1U<<17)
+
+# define CONST_LIST        (1U<<18)	/*  Used with TYPE_INTEGER and TYPE_BIT_STRING  */
+# define CONST_MIN_MAX     (1U<<19)
+
+# define CONST_1_PARAM     (1U<<20)
+
+# define CONST_SIZE        (1U<<21)
+
+# define CONST_DEFINED_BY  (1U<<22)
+
+/* Those two are deprecated and used for backwards compatibility */
+# define CONST_GENERALIZED (1U<<23)
+# define CONST_UTC         (1U<<24)
+
+/* #define CONST_IMPORTS     (1U<<25) */
+
+# define CONST_NOT_USED    (1U<<26)
+# define CONST_SET         (1U<<27)
+# define CONST_ASSIGN      (1U<<28)
+
+# define CONST_DOWN        (1U<<29)
+# define CONST_RIGHT       (1U<<30)
+
+
+# define ASN1_ETYPE_TIME 17
+/****************************************/
+/* Returns the first 8 bits.            */
+/* Used with the field type of asn1_node_st */
+/****************************************/
+inline static unsigned int
+type_field (unsigned int ntype)
+{
+  return (ntype & 0xff);
+}
+
+/* To convert old types from a static structure */
+inline static unsigned int
+convert_old_type (unsigned int ntype)
+{
+  unsigned int type = ntype & 0xff;
+  if (type == ASN1_ETYPE_TIME)
+    {
+      if (ntype & CONST_UTC)
+	type = ASN1_ETYPE_UTC_TIME;
+      else
+	type = ASN1_ETYPE_GENERALIZED_TIME;
+
+      ntype &= ~(CONST_UTC | CONST_GENERALIZED);
+      ntype &= 0xffffff00;
+      ntype |= type;
+
+      return ntype;
+    }
+  else
+    return ntype;
+}
+
+static inline void *
+_asn1_realloc (void *ptr, size_t size)
+{
+  void *ret;
+
+  if (size == 0)
+    return ptr;
+
+  ret = realloc (ptr, size);
+  if (ret == NULL)
+    {
+      free (ptr);
+    }
+  return ret;
+}
+
+#endif /* INT_H */

grub-core/lib/libtasn1/lib/parser_aux.h

@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2000-2022 Free Software Foundation, Inc.
+ *
+ * This file is part of LIBTASN1.
+ *
+ * The LIBTASN1 library is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef _PARSER_AUX_H
+# define _PARSER_AUX_H
+
+/***********************************************/
+/* Type: list_type                             */
+/* Description: type used in the list during   */
+/* the structure creation.                     */
+/***********************************************/
+typedef struct list_struct
+{
+  asn1_node node;
+  struct list_struct *next;
+} list_type;
+
+/***************************************/
+/*  Functions used by ASN.1 parser     */
+/***************************************/
+asn1_node _asn1_add_static_node (list_type ** e_list, unsigned int type);
+
+void _asn1_delete_list (list_type * e_list);
+
+void _asn1_delete_list_and_nodes (list_type * e_list);
+
+void _asn1_delete_node_from_list (list_type * list, asn1_node node);
+
+asn1_node
+_asn1_set_value (asn1_node node, const void *value, unsigned int len);
+
+asn1_node _asn1_set_value_m (asn1_node node, void *value, unsigned int len);
+
+asn1_node
+_asn1_set_value_lv (asn1_node node, const void *value, unsigned int len);
+
+asn1_node
+_asn1_append_value (asn1_node node, const void *value, unsigned int len);
+
+asn1_node _asn1_set_name (asn1_node node, const char *name);
+
+asn1_node _asn1_cpy_name (asn1_node dst, asn1_node_const src);
+
+asn1_node _asn1_set_right (asn1_node node, asn1_node right);
+
+asn1_node _asn1_get_last_right (asn1_node_const node);
+
+void _asn1_remove_node (asn1_node node, unsigned int flags);
+
+/* Max 64-bit integer length is 20 chars + 1 for sign + 1 for null termination */
+# define LTOSTR_MAX_SIZE 22
+char *_asn1_ltostr (int64_t v, char str[LTOSTR_MAX_SIZE]);
+
+asn1_node _asn1_find_up (asn1_node_const node);
+
+int _asn1_change_integer_value (asn1_node node);
+
+# define EXPAND_OBJECT_ID_MAX_RECURSION 16
+int _asn1_expand_object_id (list_type ** list, asn1_node node);
+
+int _asn1_type_set_config (asn1_node node);
+
+int _asn1_check_identifier (asn1_node_const node);
+
+int _asn1_set_default_tag (asn1_node node);
+
+/******************************************************************/
+/* Function : _asn1_get_right                                     */
+/* Description: returns the element pointed by the RIGHT field of */
+/*              a NODE_ASN element.                               */
+/* Parameters:                                                    */
+/*   node: NODE_ASN element pointer.                              */
+/* Return: field RIGHT of NODE.                                   */
+/******************************************************************/
+inline static asn1_node
+_asn1_get_right (asn1_node_const node)
+{
+  if (node == NULL)
+    return NULL;
+  return node->right;
+}
+
+/******************************************************************/
+/* Function : _asn1_set_down                                      */
+/* Description: sets the field DOWN in a NODE_ASN element.        */
+/* Parameters:                                                    */
+/*   node: element pointer.                                       */
+/*   down: pointer to a NODE_ASN element that you want be pointed */
+/*          by NODE.                                              */
+/* Return: pointer to *NODE.                                      */
+/******************************************************************/
+inline static asn1_node
+_asn1_set_down (asn1_node node, asn1_node down)
+{
+  if (node == NULL)
+    return node;
+  node->down = down;
+  if (down)
+    down->left = node;
+  return node;
+}
+
+/******************************************************************/
+/* Function : _asn1_get_down                                      */
+/* Description: returns the element pointed by the DOWN field of  */
+/*              a NODE_ASN element.                               */
+/* Parameters:                                                    */
+/*   node: NODE_ASN element pointer.                              */
+/* Return: field DOWN of NODE.                                    */
+/******************************************************************/
+inline static asn1_node
+_asn1_get_down (asn1_node_const node)
+{
+  if (node == NULL)
+    return NULL;
+  return node->down;
+}
+
+/******************************************************************/
+/* Function : _asn1_get_name                                      */
+/* Description: returns the name of a NODE_ASN element.           */
+/* Parameters:                                                    */
+/*   node: NODE_ASN element pointer.                              */
+/* Return: a null terminated string.                              */
+/******************************************************************/
+inline static char *
+_asn1_get_name (asn1_node_const node)
+{
+  if (node == NULL)
+    return NULL;
+  return (char *) node->name;
+}
+
+/******************************************************************/
+/* Function : _asn1_mod_type                                      */
+/* Description: change the field TYPE of an NODE_ASN element.     */
+/*              The new value is the old one | (bitwise or) the   */
+/*              paramener VALUE.                                  */
+/* Parameters:                                                    */
+/*   node: NODE_ASN element pointer.                              */
+/*   value: the integer value that must be or-ed with the current */
+/*          value of field TYPE.                                  */
+/* Return: NODE pointer.                                          */
+/******************************************************************/
+inline static asn1_node
+_asn1_mod_type (asn1_node node, unsigned int value)
+{
+  if (node == NULL)
+    return node;
+  node->type |= value;
+  return node;
+}
+
+#endif

grub-core/lib/libtasn1/lib/structure.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2002-2022 Free Software Foundation, Inc.
+ *
+ * This file is part of LIBTASN1.
+ *
+ * The LIBTASN1 library is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+/*************************************************/
+/* File: structure.h                             */
+/* Description: list of exported object by       */
+/*   "structure.c"                               */
+/*************************************************/
+
+#ifndef _STRUCTURE_H
+# define _STRUCTURE_H
+
+# include "parser_aux.h"	/* list_type */
+
+int _asn1_create_static_structure (asn1_node_const pointer,
+				   char *output_file_name, char *vector_name);
+
+asn1_node _asn1_copy_structure3 (asn1_node_const source_node);
+
+asn1_node _asn1_add_single_node (unsigned int type);
+
+asn1_node _asn1_find_left (asn1_node_const node);
+
+int
+_asn1_delete_structure (list_type * e_list, asn1_node * structure,
+			unsigned int flags);
+
+#endif