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structure.c
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structure.c
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/*
* Copyright (C) 2002-2014 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.c */
/* Description: Functions to create and delete an */
/* ASN1 tree. */
/*****************************************************/
#include <int.h>
#include <structure.h>
#include "parser_aux.h"
#include <gstr.h>
extern char _asn1_identifierMissing[];
/******************************************************/
/* Function : _asn1_add_single_node */
/* Description: creates a new NODE_ASN element. */
/* Parameters: */
/* type: type of the new element (see ASN1_ETYPE_ */
/* and CONST_ constants). */
/* Return: pointer to the new element. */
/******************************************************/
asn1_node
_asn1_add_single_node (unsigned int type)
{
asn1_node punt;
punt = calloc (1, sizeof (struct asn1_node_st));
if (punt == NULL)
return NULL;
punt->type = type;
return punt;
}
/******************************************************************/
/* Function : _asn1_find_left */
/* Description: returns the NODE_ASN element with RIGHT field that*/
/* points the element NODE. */
/* Parameters: */
/* node: NODE_ASN element pointer. */
/* Return: NULL if not found. */
/******************************************************************/
asn1_node
_asn1_find_left (asn1_node node)
{
if ((node == NULL) || (node->left == NULL) || (node->left->down == node))
return NULL;
return node->left;
}
int
_asn1_create_static_structure (asn1_node pointer, char *output_file_name,
char *vector_name)
{
FILE *file;
asn1_node p;
unsigned long t;
file = fopen (output_file_name, "w");
if (file == NULL)
return ASN1_FILE_NOT_FOUND;
fprintf (file, "#if HAVE_CONFIG_H\n");
fprintf (file, "# include \"config.h\"\n");
fprintf (file, "#endif\n\n");
fprintf (file, "#include <libtasn1.h>\n\n");
fprintf (file, "const asn1_static_node %s[] = {\n", vector_name);
p = pointer;
while (p)
{
fprintf (file, " { ");
if (p->name[0] != 0)
fprintf (file, "\"%s\", ", p->name);
else
fprintf (file, "NULL, ");
t = p->type;
if (p->down)
t |= CONST_DOWN;
if (p->right)
t |= CONST_RIGHT;
fprintf (file, "%lu, ", t);
if (p->value)
fprintf (file, "\"%s\"},\n", p->value);
else
fprintf (file, "NULL },\n");
if (p->down)
{
p = p->down;
}
else if (p->right)
{
p = p->right;
}
else
{
while (1)
{
p = _asn1_get_up (p);
if (p == pointer)
{
p = NULL;
break;
}
if (p->right)
{
p = p->right;
break;
}
}
}
}
fprintf (file, " { NULL, 0, NULL }\n};\n");
fclose (file);
return ASN1_SUCCESS;
}
/**
* asn1_array2tree:
* @array: specify the array that contains ASN.1 declarations
* @definitions: return the pointer to the structure created by
* *ARRAY ASN.1 declarations
* @errorDescription: return the error description.
*
* Creates the structures needed to manage the ASN.1 definitions.
* @array is a vector created by asn1_parser2array().
*
* Returns: %ASN1_SUCCESS if structure was created correctly,
* %ASN1_ELEMENT_NOT_EMPTY if *@definitions not NULL,
* %ASN1_IDENTIFIER_NOT_FOUND if in the file there is an identifier
* that is not defined (see @errorDescription for more information),
* %ASN1_ARRAY_ERROR if the array pointed by @array is wrong.
**/
int
asn1_array2tree (const asn1_static_node * array, asn1_node * definitions,
char *errorDescription)
{
asn1_node p, p_last = NULL;
unsigned long k;
int move;
int result;
unsigned int type;
if (errorDescription)
errorDescription[0] = 0;
if (*definitions != NULL)
return ASN1_ELEMENT_NOT_EMPTY;
move = UP;
k = 0;
while (array[k].value || array[k].type || array[k].name)
{
type = convert_old_type (array[k].type);
p = _asn1_add_static_node (type & (~CONST_DOWN));
if (array[k].name)
_asn1_set_name (p, array[k].name);
if (array[k].value)
_asn1_set_value (p, array[k].value, strlen (array[k].value) + 1);
if (*definitions == NULL)
*definitions = p;
if (move == DOWN)
_asn1_set_down (p_last, p);
else if (move == RIGHT)
_asn1_set_right (p_last, p);
p_last = p;
if (type & CONST_DOWN)
move = DOWN;
else if (type & CONST_RIGHT)
move = RIGHT;
else
{
while (1)
{
if (p_last == *definitions)
break;
p_last = _asn1_get_up (p_last);
if (p_last == NULL)
break;
if (p_last->type & CONST_RIGHT)
{
p_last->type &= ~CONST_RIGHT;
move = RIGHT;
break;
}
} /* while */
}
k++;
} /* while */
if (p_last == *definitions)
{
result = _asn1_check_identifier (*definitions);
if (result == ASN1_SUCCESS)
{
_asn1_change_integer_value (*definitions);
_asn1_expand_object_id (*definitions);
}
}
else
{
result = ASN1_ARRAY_ERROR;
}
if (errorDescription != NULL)
{
if (result == ASN1_IDENTIFIER_NOT_FOUND)
{
Estrcpy (errorDescription, ":: identifier '");
Estrcat (errorDescription, _asn1_identifierMissing);
Estrcat (errorDescription, "' not found");
}
else
errorDescription[0] = 0;
}
if (result != ASN1_SUCCESS)
{
_asn1_delete_list_and_nodes ();
*definitions = NULL;
}
else
_asn1_delete_list ();
return result;
}
/**
* asn1_delete_structure:
* @structure: pointer to the structure that you want to delete.
*
* Deletes the structure *@structure. At the end, *@structure is set
* to NULL.
*
* Returns: %ASN1_SUCCESS if successful, %ASN1_ELEMENT_NOT_FOUND if
* *@structure was NULL.
**/
int
asn1_delete_structure (asn1_node * structure)
{
return asn1_delete_structure2(structure, 0);
}
/**
* asn1_delete_structure2:
* @structure: pointer to the structure that you want to delete.
* @flags: additional flags (see %ASN1_DELETE_FLAG)
*
* Deletes the structure *@structure. At the end, *@structure is set
* to NULL.
*
* Returns: %ASN1_SUCCESS if successful, %ASN1_ELEMENT_NOT_FOUND if
* *@structure was NULL.
**/
int
asn1_delete_structure2 (asn1_node * structure, unsigned int flags)
{
asn1_node p, p2, p3;
if (*structure == NULL)
return ASN1_ELEMENT_NOT_FOUND;
p = *structure;
while (p)
{
if (p->down)
{
p = p->down;
}
else
{ /* no down */
p2 = p->right;
if (p != *structure)
{
p3 = _asn1_get_up (p);
_asn1_set_down (p3, p2);
_asn1_remove_node (p, flags);
p = p3;
}
else
{ /* p==root */
p3 = _asn1_find_left (p);
if (!p3)
{
p3 = _asn1_get_up (p);
if (p3)
_asn1_set_down (p3, p2);
else
{
if (p->right)
p->right->left = NULL;
}
}
else
_asn1_set_right (p3, p2);
_asn1_remove_node (p, flags);
p = NULL;
}
}
}
*structure = NULL;
return ASN1_SUCCESS;
}
/**
* asn1_delete_element:
* @structure: pointer to the structure that contains the element you
* want to delete.
* @element_name: element's name you want to delete.
*
* Deletes the element named *@element_name inside *@structure.
*
* Returns: %ASN1_SUCCESS if successful, %ASN1_ELEMENT_NOT_FOUND if
* the @element_name was not found.
**/
int
asn1_delete_element (asn1_node structure, const char *element_name)
{
asn1_node p2, p3, source_node;
source_node = asn1_find_node (structure, element_name);
if (source_node == NULL)
return ASN1_ELEMENT_NOT_FOUND;
p2 = source_node->right;
p3 = _asn1_find_left (source_node);
if (!p3)
{
p3 = _asn1_get_up (source_node);
if (p3)
_asn1_set_down (p3, p2);
else if (source_node->right)
source_node->right->left = NULL;
}
else
_asn1_set_right (p3, p2);
return asn1_delete_structure (&source_node);
}
asn1_node
_asn1_copy_structure3 (asn1_node source_node)
{
asn1_node dest_node, p_s, p_d, p_d_prev;
int move;
if (source_node == NULL)
return NULL;
dest_node = _asn1_add_single_node (source_node->type);
p_s = source_node;
p_d = dest_node;
move = DOWN;
do
{
if (move != UP)
{
if (p_s->name[0] != 0)
_asn1_cpy_name (p_d, p_s);
if (p_s->value)
_asn1_set_value (p_d, p_s->value, p_s->value_len);
if (p_s->down)
{
p_s = p_s->down;
p_d_prev = p_d;
p_d = _asn1_add_single_node (p_s->type);
_asn1_set_down (p_d_prev, p_d);
continue;
}
p_d->start = p_s->start;
p_d->end = p_s->end;
}
if (p_s == source_node)
break;
if (p_s->right)
{
move = RIGHT;
p_s = p_s->right;
p_d_prev = p_d;
p_d = _asn1_add_single_node (p_s->type);
_asn1_set_right (p_d_prev, p_d);
}
else
{
move = UP;
p_s = _asn1_get_up (p_s);
p_d = _asn1_get_up (p_d);
}
}
while (p_s != source_node);
return dest_node;
}
static asn1_node
_asn1_copy_structure2 (asn1_node root, const char *source_name)
{
asn1_node source_node;
source_node = asn1_find_node (root, source_name);
return _asn1_copy_structure3 (source_node);
}
static int
_asn1_type_choice_config (asn1_node node)
{
asn1_node p, p2, p3, p4;
int move, tlen;
if (node == NULL)
return ASN1_ELEMENT_NOT_FOUND;
p = node;
move = DOWN;
while (!((p == node) && (move == UP)))
{
if (move != UP)
{
if ((type_field (p->type) == ASN1_ETYPE_CHOICE)
&& (p->type & CONST_TAG))
{
p2 = p->down;
while (p2)
{
if (type_field (p2->type) != ASN1_ETYPE_TAG)
{
p2->type |= CONST_TAG;
p3 = _asn1_find_left (p2);
while (p3)
{
if (type_field (p3->type) == ASN1_ETYPE_TAG)
{
p4 = _asn1_add_single_node (p3->type);
tlen = _asn1_strlen (p3->value);
if (tlen > 0)
_asn1_set_value (p4, p3->value, tlen + 1);
_asn1_set_right (p4, p2->down);
_asn1_set_down (p2, p4);
}
p3 = _asn1_find_left (p3);
}
}
p2 = p2->right;
}
p->type &= ~(CONST_TAG);
p2 = p->down;
while (p2)
{
p3 = p2->right;
if (type_field (p2->type) == ASN1_ETYPE_TAG)
asn1_delete_structure (&p2);
p2 = p3;
}
}
move = DOWN;
}
else
move = RIGHT;
if (move == DOWN)
{
if (p->down)
p = p->down;
else
move = RIGHT;
}
if (p == node)
{
move = UP;
continue;
}
if (move == RIGHT)
{
if (p->right)
p = p->right;
else
move = UP;
}
if (move == UP)
p = _asn1_get_up (p);
}
return ASN1_SUCCESS;
}
static int
_asn1_expand_identifier (asn1_node * node, asn1_node root)
{
asn1_node p, p2, p3;
char name2[ASN1_MAX_NAME_SIZE + 2];
int move;
if (node == NULL)
return ASN1_ELEMENT_NOT_FOUND;
p = *node;
move = DOWN;
while (!((p == *node) && (move == UP)))
{
if (move != UP)
{
if (type_field (p->type) == ASN1_ETYPE_IDENTIFIER)
{
snprintf (name2, sizeof (name2), "%s.%s", root->name, p->value);
p2 = _asn1_copy_structure2 (root, name2);
if (p2 == NULL)
{
return ASN1_IDENTIFIER_NOT_FOUND;
}
_asn1_cpy_name (p2, p);
p2->right = p->right;
p2->left = p->left;
if (p->right)
p->right->left = p2;
p3 = p->down;
if (p3)
{
while (p3->right)
p3 = p3->right;
_asn1_set_right (p3, p2->down);
_asn1_set_down (p2, p->down);
}
p3 = _asn1_find_left (p);
if (p3)
_asn1_set_right (p3, p2);
else
{
p3 = _asn1_get_up (p);
if (p3)
_asn1_set_down (p3, p2);
else
{
p2->left = NULL;
}
}
if (p->type & CONST_SIZE)
p2->type |= CONST_SIZE;
if (p->type & CONST_TAG)
p2->type |= CONST_TAG;
if (p->type & CONST_OPTION)
p2->type |= CONST_OPTION;
if (p->type & CONST_DEFAULT)
p2->type |= CONST_DEFAULT;
if (p->type & CONST_SET)
p2->type |= CONST_SET;
if (p->type & CONST_NOT_USED)
p2->type |= CONST_NOT_USED;
if (p == *node)
*node = p2;
_asn1_remove_node (p, 0);
p = p2;
move = DOWN;
continue;
}
move = DOWN;
}
else
move = RIGHT;
if (move == DOWN)
{
if (p->down)
p = p->down;
else
move = RIGHT;
}
if (p == *node)
{
move = UP;
continue;
}
if (move == RIGHT)
{
if (p->right)
p = p->right;
else
move = UP;
}
if (move == UP)
p = _asn1_get_up (p);
}
return ASN1_SUCCESS;
}
/**
* asn1_create_element:
* @definitions: pointer to the structure returned by "parser_asn1" function
* @source_name: the name of the type of the new structure (must be
* inside p_structure).
* @element: pointer to the structure created.
*
* Creates a structure of type @source_name. Example using
* "pkix.asn":
*
* rc = asn1_create_element(cert_def, "PKIX1.Certificate", certptr);
*
* Returns: %ASN1_SUCCESS if creation OK, %ASN1_ELEMENT_NOT_FOUND if
* @source_name is not known.
**/
int
asn1_create_element (asn1_node definitions, const char *source_name,
asn1_node * element)
{
asn1_node dest_node;
int res;
dest_node = _asn1_copy_structure2 (definitions, source_name);
if (dest_node == NULL)
return ASN1_ELEMENT_NOT_FOUND;
_asn1_set_name (dest_node, "");
res = _asn1_expand_identifier (&dest_node, definitions);
_asn1_type_choice_config (dest_node);
*element = dest_node;
return res;
}
/**
* asn1_print_structure:
* @out: pointer to the output file (e.g. stdout).
* @structure: pointer to the structure that you want to visit.
* @name: an element of the structure
* @mode: specify how much of the structure to print, can be
* %ASN1_PRINT_NAME, %ASN1_PRINT_NAME_TYPE,
* %ASN1_PRINT_NAME_TYPE_VALUE, or %ASN1_PRINT_ALL.
*
* Prints on the @out file descriptor the structure's tree starting
* from the @name element inside the structure @structure.
**/
void
asn1_print_structure (FILE * out, asn1_node structure, const char *name,
int mode)
{
asn1_node p, root;
int k, indent = 0, len, len2, len3;
if (out == NULL)
return;
root = asn1_find_node (structure, name);
if (root == NULL)
return;
p = root;
while (p)
{
if (mode == ASN1_PRINT_ALL)
{
for (k = 0; k < indent; k++)
fprintf (out, " ");
fprintf (out, "name:");
if (p->name[0] != 0)
fprintf (out, "%s ", p->name);
else
fprintf (out, "NULL ");
}
else
{
switch (type_field (p->type))
{
case ASN1_ETYPE_CONSTANT:
case ASN1_ETYPE_TAG:
case ASN1_ETYPE_SIZE:
break;
default:
for (k = 0; k < indent; k++)
fprintf (out, " ");
fprintf (out, "name:");
if (p->name[0] != 0)
fprintf (out, "%s ", p->name);
else
fprintf (out, "NULL ");
}
}
if (mode != ASN1_PRINT_NAME)
{
unsigned type = type_field (p->type);
switch (type)
{
case ASN1_ETYPE_CONSTANT:
if (mode == ASN1_PRINT_ALL)
fprintf (out, "type:CONST");
break;
case ASN1_ETYPE_TAG:
if (mode == ASN1_PRINT_ALL)
fprintf (out, "type:TAG");
break;
case ASN1_ETYPE_SIZE:
if (mode == ASN1_PRINT_ALL)
fprintf (out, "type:SIZE");
break;
case ASN1_ETYPE_DEFAULT:
fprintf (out, "type:DEFAULT");
break;
case ASN1_ETYPE_IDENTIFIER:
fprintf (out, "type:IDENTIFIER");
break;
case ASN1_ETYPE_ANY:
fprintf (out, "type:ANY");
break;
case ASN1_ETYPE_CHOICE:
fprintf (out, "type:CHOICE");
break;
case ASN1_ETYPE_DEFINITIONS:
fprintf (out, "type:DEFINITIONS");
break;
CASE_HANDLED_ETYPES:
fprintf (out, "%s", _asn1_tags[type].desc);
break;
default:
break;
}
}
if ((mode == ASN1_PRINT_NAME_TYPE_VALUE) || (mode == ASN1_PRINT_ALL))
{
switch (type_field (p->type))
{
case ASN1_ETYPE_CONSTANT:
if (mode == ASN1_PRINT_ALL)
if (p->value)
fprintf (out, " value:%s", p->value);
break;
case ASN1_ETYPE_TAG:
if (mode == ASN1_PRINT_ALL)
if (p->value)
fprintf (out, " value:%s", p->value);
break;
case ASN1_ETYPE_SIZE:
if (mode == ASN1_PRINT_ALL)
if (p->value)
fprintf (out, " value:%s", p->value);
break;
case ASN1_ETYPE_DEFAULT:
if (p->value)
fprintf (out, " value:%s", p->value);
else if (p->type & CONST_TRUE)
fprintf (out, " value:TRUE");
else if (p->type & CONST_FALSE)
fprintf (out, " value:FALSE");
break;
case ASN1_ETYPE_IDENTIFIER:
if (p->value)
fprintf (out, " value:%s", p->value);
break;
case ASN1_ETYPE_INTEGER:
if (p->value)
{
len2 = -1;
len = asn1_get_length_der (p->value, p->value_len, &len2);
fprintf (out, " value:0x");
if (len > 0)
for (k = 0; k < len; k++)
fprintf (out, "%02x", (unsigned) (p->value)[k + len2]);
}
break;
case ASN1_ETYPE_ENUMERATED:
if (p->value)
{
len2 = -1;
len = asn1_get_length_der (p->value, p->value_len, &len2);
fprintf (out, " value:0x");
if (len > 0)
for (k = 0; k < len; k++)
fprintf (out, "%02x", (unsigned) (p->value)[k + len2]);
}
break;
case ASN1_ETYPE_BOOLEAN:
if (p->value)
{
if (p->value[0] == 'T')
fprintf (out, " value:TRUE");
else if (p->value[0] == 'F')
fprintf (out, " value:FALSE");
}
break;
case ASN1_ETYPE_BIT_STRING:
if (p->value)
{
len2 = -1;
len = asn1_get_length_der (p->value, p->value_len, &len2);
if (len > 0)
{
fprintf (out, " value(%i):",
(len - 1) * 8 - (p->value[len2]));
for (k = 1; k < len; k++)
fprintf (out, "%02x", (unsigned) (p->value)[k + len2]);
}
}
break;
case ASN1_ETYPE_GENERALIZED_TIME:
case ASN1_ETYPE_UTC_TIME:
if (p->value)
{
fprintf (out, " value:");
for (k = 0; k < p->value_len; k++)
fprintf (out, "%c", (p->value)[k]);
}
break;
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_UTF8_STRING:
case ASN1_ETYPE_VISIBLE_STRING:
if (p->value)
{
len2 = -1;
len = asn1_get_length_der (p->value, p->value_len, &len2);
fprintf (out, " value:");
if (len > 0)
for (k = 0; k < len; k++)
fprintf (out, "%c", (p->value)[k + len2]);
}
break;
case ASN1_ETYPE_BMP_STRING:
case ASN1_ETYPE_OCTET_STRING:
if (p->value)
{
len2 = -1;
len = asn1_get_length_der (p->value, p->value_len, &len2);
fprintf (out, " value:");
if (len > 0)
for (k = 0; k < len; k++)
fprintf (out, "%02x", (unsigned) (p->value)[k + len2]);
}
break;
case ASN1_ETYPE_OBJECT_ID:
if (p->value)
fprintf (out, " value:%s", p->value);
break;
case ASN1_ETYPE_ANY:
if (p->value)
{
len3 = -1;
len2 = asn1_get_length_der (p->value, p->value_len, &len3);
fprintf (out, " value:");
if (len2 > 0)
for (k = 0; k < len2; k++)
fprintf (out, "%02x", (unsigned) (p->value)[k + len3]);
}
break;
case ASN1_ETYPE_SET:
case ASN1_ETYPE_SET_OF:
case ASN1_ETYPE_CHOICE:
case ASN1_ETYPE_DEFINITIONS:
case ASN1_ETYPE_SEQUENCE_OF:
case ASN1_ETYPE_SEQUENCE:
case ASN1_ETYPE_NULL:
break;
default:
break;
}
}
if (mode == ASN1_PRINT_ALL)
{
if (p->type & 0x1FFFFF00)
{
fprintf (out, " attr:");
if (p->type & CONST_UNIVERSAL)
fprintf (out, "UNIVERSAL,");
if (p->type & CONST_PRIVATE)
fprintf (out, "PRIVATE,");
if (p->type & CONST_APPLICATION)
fprintf (out, "APPLICATION,");
if (p->type & CONST_EXPLICIT)
fprintf (out, "EXPLICIT,");
if (p->type & CONST_IMPLICIT)
fprintf (out, "IMPLICIT,");
if (p->type & CONST_TAG)
fprintf (out, "TAG,");
if (p->type & CONST_DEFAULT)
fprintf (out, "DEFAULT,");
if (p->type & CONST_TRUE)
fprintf (out, "TRUE,");
if (p->type & CONST_FALSE)
fprintf (out, "FALSE,");
if (p->type & CONST_LIST)
fprintf (out, "LIST,");
if (p->type & CONST_MIN_MAX)
fprintf (out, "MIN_MAX,");
if (p->type & CONST_OPTION)
fprintf (out, "OPTION,");
if (p->type & CONST_1_PARAM)
fprintf (out, "1_PARAM,");
if (p->type & CONST_SIZE)
fprintf (out, "SIZE,");
if (p->type & CONST_DEFINED_BY)
fprintf (out, "DEF_BY,");
if (p->type & CONST_GENERALIZED)
fprintf (out, "GENERALIZED,");
if (p->type & CONST_UTC)
fprintf (out, "UTC,");
if (p->type & CONST_SET)
fprintf (out, "SET,");
if (p->type & CONST_NOT_USED)
fprintf (out, "NOT_USED,");
if (p->type & CONST_ASSIGN)
fprintf (out, "ASSIGNMENT,");
}
}
if (mode == ASN1_PRINT_ALL)
{
fprintf (out, "\n");
}
else
{
switch (type_field (p->type))
{
case ASN1_ETYPE_CONSTANT:
case ASN1_ETYPE_TAG:
case ASN1_ETYPE_SIZE:
break;