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|
/*
* Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010 Free Software
* Foundation, Inc.
* Copyright (C) 2000,2001 Fabio Fiorina
*
* 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 "parser_aux.h"
#include "gstr.h"
#include "structure.h"
#include "element.h"
char _asn1_identifierMissing[ASN1_MAX_NAME_SIZE + 1]; /* identifier name not found */
/***********************************************/
/* Type: list_type */
/* Description: type used in the list during */
/* the structure creation. */
/***********************************************/
typedef struct list_struct
{
ASN1_TYPE node;
struct list_struct *next;
} list_type;
/* Pointer to the first element of the list */
list_type *firstElement = NULL;
/******************************************************/
/* Function : _asn1_add_node */
/* Description: creates a new NODE_ASN element and */
/* puts it in the list pointed by firstElement. */
/* Parameters: */
/* type: type of the new element (see TYPE_ */
/* and CONST_ constants). */
/* Return: pointer to the new element. */
/******************************************************/
ASN1_TYPE
_asn1_add_node (unsigned int type)
{
list_type *listElement;
ASN1_TYPE punt;
punt = (ASN1_TYPE) _asn1_calloc (1, sizeof (struct node_asn_struct));
if (punt == NULL)
return NULL;
listElement = (list_type *) _asn1_malloc (sizeof (list_type));
if (listElement == NULL)
{
_asn1_free (punt);
return NULL;
}
listElement->node = punt;
listElement->next = firstElement;
firstElement = listElement;
punt->type = type;
return punt;
}
/**
* asn1_find_node:
* @pointer: NODE_ASN element pointer.
* @name: null terminated string with the element's name to find.
*
* Searches for an element called NAME starting from POINTER. The
* name is composed by differents identifiers separated by dots. When
* *POINTER has a name, the first identifier must be the name of
* *POINTER, otherwise it must be the name of one child of *POINTER.
*
* Return value: the searching result. NULL if not found.
**/
ASN1_TYPE
asn1_find_node (ASN1_TYPE pointer, const char *name)
{
ASN1_TYPE p;
char *n_end, n[ASN1_MAX_NAME_SIZE + 1];
const char *n_start;
if (pointer == NULL)
return NULL;
if (name == NULL)
return NULL;
p = pointer;
n_start = name;
if (p->name != NULL)
{ /* has *pointer got a name ? */
n_end = strchr (n_start, '.'); /* search the first dot */
if (n_end)
{
memcpy (n, n_start, n_end - n_start);
n[n_end - n_start] = 0;
n_start = n_end;
n_start++;
}
else
{
_asn1_str_cpy (n, sizeof (n), n_start);
n_start = NULL;
}
while (p)
{
if ((p->name) && (!strcmp (p->name, n)))
break;
else
p = p->right;
} /* while */
if (p == NULL)
return NULL;
}
else
{ /* *pointer doesn't have a name */
if (n_start[0] == 0)
return p;
}
while (n_start)
{ /* Has the end of NAME been reached? */
n_end = strchr (n_start, '.'); /* search the next dot */
if (n_end)
{
memcpy (n, n_start, n_end - n_start);
n[n_end - n_start] = 0;
n_start = n_end;
n_start++;
}
else
{
_asn1_str_cpy (n, sizeof (n), n_start);
n_start = NULL;
}
if (p->down == NULL)
return NULL;
p = p->down;
/* The identifier "?LAST" indicates the last element
in the right chain. */
if (!strcmp (n, "?LAST"))
{
if (p == NULL)
return NULL;
while (p->right)
p = p->right;
}
else
{ /* no "?LAST" */
while (p)
{
if ((p->name) && (!strcmp (p->name, n)))
break;
else
p = p->right;
}
if (p == NULL)
return NULL;
}
} /* while */
return p;
}
/******************************************************************/
/* Function : _asn1_set_value */
/* Description: sets the field VALUE in a NODE_ASN element. The */
/* previous value (if exist) will be lost */
/* Parameters: */
/* node: element pointer. */
/* value: pointer to the value that you want to set. */
/* len: character number of value. */
/* Return: pointer to the NODE_ASN element. */
/******************************************************************/
ASN1_TYPE
_asn1_set_value (ASN1_TYPE node, const void *value, unsigned int len)
{
if (node == NULL)
return node;
if (node->value)
{
if (node->value != node->small_value)
_asn1_free (node->value);
node->value = NULL;
node->value_len = 0;
}
if (!len)
return node;
if (len < sizeof (node->small_value))
{
node->value = node->small_value;
}
else
{
node->value = _asn1_malloc (len);
if (node->value == NULL)
return NULL;
}
node->value_len = len;
memcpy (node->value, value, len);
return node;
}
/******************************************************************/
/* Function : _asn1_set_value_octet */
/* Description: sets the field VALUE in a NODE_ASN element. The */
/* previous value (if exist) will be lost. The value */
/* given is stored as an octet string. */
/* Parameters: */
/* node: element pointer. */
/* value: pointer to the value that you want to set. */
/* len: character number of value. */
/* Return: pointer to the NODE_ASN element. */
/******************************************************************/
ASN1_TYPE
_asn1_set_value_octet (ASN1_TYPE node, const void *value, unsigned int len)
{
int len2;
void *temp;
if (node == NULL)
return node;
asn1_length_der (len, NULL, &len2);
temp = (unsigned char *) _asn1_malloc (len + len2);
if (temp == NULL)
return NULL;
asn1_octet_der (value, len, temp, &len2);
return _asn1_set_value_m (node, temp, len2);
}
/* the same as _asn1_set_value except that it sets an already malloc'ed
* value.
*/
ASN1_TYPE
_asn1_set_value_m (ASN1_TYPE node, void *value, unsigned int len)
{
if (node == NULL)
return node;
if (node->value)
{
if (node->value != node->small_value)
_asn1_free (node->value);
node->value = NULL;
node->value_len = 0;
}
if (!len)
return node;
node->value = value;
node->value_len = len;
return node;
}
/******************************************************************/
/* Function : _asn1_append_value */
/* Description: appends to the field VALUE in a NODE_ASN element. */
/* */
/* Parameters: */
/* node: element pointer. */
/* value: pointer to the value that you want to be appended. */
/* len: character number of value. */
/* Return: pointer to the NODE_ASN element. */
/******************************************************************/
ASN1_TYPE
_asn1_append_value (ASN1_TYPE node, const void *value, unsigned int len)
{
if (node == NULL)
return node;
if (node->value != NULL && node->value != node->small_value)
{
/* value is allocated */
int prev_len = node->value_len;
node->value_len += len;
node->value = _asn1_realloc (node->value, node->value_len);
if (node->value == NULL)
{
node->value_len = 0;
return NULL;
}
memcpy (&node->value[prev_len], value, len);
return node;
}
else if (node->value == node->small_value)
{
/* value is in node */
int prev_len = node->value_len;
node->value_len += len;
node->value = _asn1_malloc (node->value_len);
if (node->value == NULL)
{
node->value_len = 0;
return NULL;
}
memcpy (node->value, node->small_value, prev_len);
memcpy (&node->value[prev_len], value, len);
return node;
}
else /* node->value == NULL */
return _asn1_set_value (node, value, len);
}
/******************************************************************/
/* Function : _asn1_set_name */
/* Description: sets the field NAME in a NODE_ASN element. The */
/* previous value (if exist) will be lost */
/* Parameters: */
/* node: element pointer. */
/* name: a null terminated string with the name that you want */
/* to set. */
/* Return: pointer to the NODE_ASN element. */
/******************************************************************/
ASN1_TYPE
_asn1_set_name (ASN1_TYPE node, const char *name)
{
if (node == NULL)
return node;
if (node->name)
{
_asn1_free (node->name);
node->name = NULL;
}
if (name == NULL)
return node;
if (strlen (name))
{
node->name = (char *) _asn1_strdup (name);
if (node->name == NULL)
return NULL;
}
else
node->name = NULL;
return node;
}
/******************************************************************/
/* Function : _asn1_set_right */
/* Description: sets the field RIGHT in a NODE_ASN element. */
/* Parameters: */
/* node: element pointer. */
/* right: pointer to a NODE_ASN element that you want be pointed*/
/* by NODE. */
/* Return: pointer to *NODE. */
/******************************************************************/
ASN1_TYPE
_asn1_set_right (ASN1_TYPE node, ASN1_TYPE right)
{
if (node == NULL)
return node;
node->right = right;
if (right)
right->left = node;
return 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. */
/******************************************************************/
ASN1_TYPE
_asn1_get_right (ASN1_TYPE node)
{
if (node == NULL)
return NULL;
return node->right;
}
/******************************************************************/
/* Function : _asn1_get_last_right */
/* Description: return the last element along the right chain. */
/* Parameters: */
/* node: starting element pointer. */
/* Return: pointer to the last element along the right chain. */
/******************************************************************/
ASN1_TYPE
_asn1_get_last_right (ASN1_TYPE node)
{
ASN1_TYPE p;
if (node == NULL)
return NULL;
p = node;
while (p->right)
p = p->right;
return p;
}
/******************************************************************/
/* 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. */
/******************************************************************/
ASN1_TYPE
_asn1_set_down (ASN1_TYPE node, ASN1_TYPE 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. */
/******************************************************************/
ASN1_TYPE
_asn1_get_down (ASN1_TYPE 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. */
/******************************************************************/
char *
_asn1_get_name (ASN1_TYPE node)
{
if (node == NULL)
return NULL;
return 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. */
/******************************************************************/
ASN1_TYPE
_asn1_mod_type (ASN1_TYPE node, unsigned int value)
{
if (node == NULL)
return node;
node->type |= value;
return node;
}
/******************************************************************/
/* Function : _asn1_remove_node */
/* Description: gets free the memory allocated for an NODE_ASN */
/* element (not the elements pointed by it). */
/* Parameters: */
/* node: NODE_ASN element pointer. */
/******************************************************************/
void
_asn1_remove_node (ASN1_TYPE node)
{
if (node == NULL)
return;
if (node->name != NULL)
_asn1_free (node->name);
if (node->value != NULL && node->value != node->small_value)
_asn1_free (node->value);
_asn1_free (node);
}
/******************************************************************/
/* Function : _asn1_find_up */
/* Description: return the father of the NODE_ASN element. */
/* Parameters: */
/* node: NODE_ASN element pointer. */
/* Return: Null if not found. */
/******************************************************************/
ASN1_TYPE
_asn1_find_up (ASN1_TYPE node)
{
ASN1_TYPE p;
if (node == NULL)
return NULL;
p = node;
while ((p->left != NULL) && (p->left->right == p))
p = p->left;
return p->left;
}
/******************************************************************/
/* Function : _asn1_delete_list */
/* Description: deletes the list elements (not the elements */
/* pointed by them). */
/******************************************************************/
void
_asn1_delete_list (void)
{
list_type *listElement;
while (firstElement)
{
listElement = firstElement;
firstElement = firstElement->next;
_asn1_free (listElement);
}
}
/******************************************************************/
/* Function : _asn1_delete_list_and nodes */
/* Description: deletes the list elements and the elements */
/* pointed by them. */
/******************************************************************/
void
_asn1_delete_list_and_nodes (void)
{
list_type *listElement;
while (firstElement)
{
listElement = firstElement;
firstElement = firstElement->next;
_asn1_remove_node (listElement->node);
_asn1_free (listElement);
}
}
char *
_asn1_ltostr (long v, char *str)
{
long d, r;
char temp[20];
int count, k, start;
if (v < 0)
{
str[0] = '-';
start = 1;
v = -v;
}
else
start = 0;
count = 0;
do
{
d = v / 10;
r = v - d * 10;
temp[start + count] = '0' + (char) r;
count++;
v = d;
}
while (v);
for (k = 0; k < count; k++)
str[k + start] = temp[start + count - k - 1];
str[count + start] = 0;
return str;
}
/******************************************************************/
/* Function : _asn1_change_integer_value */
/* Description: converts into DER coding the value assign to an */
/* INTEGER constant. */
/* Parameters: */
/* node: root of an ASN1element. */
/* Return: */
/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL, */
/* otherwise ASN1_SUCCESS */
/******************************************************************/
asn1_retCode
_asn1_change_integer_value (ASN1_TYPE node)
{
ASN1_TYPE p;
unsigned char val[SIZEOF_UNSIGNED_LONG_INT];
unsigned char val2[SIZEOF_UNSIGNED_LONG_INT + 1];
int len;
if (node == NULL)
return ASN1_ELEMENT_NOT_FOUND;
p = node;
while (p)
{
if ((type_field (p->type) == TYPE_INTEGER) && (p->type & CONST_ASSIGN))
{
if (p->value)
{
_asn1_convert_integer (p->value, val, sizeof (val), &len);
asn1_octet_der (val, len, val2, &len);
_asn1_set_value (p, val2, len);
}
}
if (p->down)
{
p = p->down;
}
else
{
if (p == node)
p = NULL;
else if (p->right)
p = p->right;
else
{
while (1)
{
p = _asn1_find_up (p);
if (p == node)
{
p = NULL;
break;
}
if (p->right)
{
p = p->right;
break;
}
}
}
}
}
return ASN1_SUCCESS;
}
/******************************************************************/
/* Function : _asn1_expand_object_id */
/* Description: expand the IDs of an OBJECT IDENTIFIER constant. */
/* Parameters: */
/* node: root of an ASN1 element. */
/* Return: */
/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL, */
/* otherwise ASN1_SUCCESS */
/******************************************************************/
asn1_retCode
_asn1_expand_object_id (ASN1_TYPE node)
{
ASN1_TYPE p, p2, p3, p4, p5;
char name_root[ASN1_MAX_NAME_SIZE], name2[2 * ASN1_MAX_NAME_SIZE + 1];
int move, tlen;
if (node == NULL)
return ASN1_ELEMENT_NOT_FOUND;
_asn1_str_cpy (name_root, sizeof (name_root), node->name);
p = node;
move = DOWN;
while (!((p == node) && (move == UP)))
{
if (move != UP)
{
if ((type_field (p->type) == TYPE_OBJECT_ID)
&& (p->type & CONST_ASSIGN))
{
p2 = p->down;
if (p2 && (type_field (p2->type) == TYPE_CONSTANT))
{
if (p2->value && !isdigit (p2->value[0]))
{
_asn1_str_cpy (name2, sizeof (name2), name_root);
_asn1_str_cat (name2, sizeof (name2), ".");
_asn1_str_cat (name2, sizeof (name2), p2->value);
p3 = asn1_find_node (node, name2);
if (!p3 || (type_field (p3->type) != TYPE_OBJECT_ID) ||
!(p3->type & CONST_ASSIGN))
return ASN1_ELEMENT_NOT_FOUND;
_asn1_set_down (p, p2->right);
_asn1_remove_node (p2);
p2 = p;
p4 = p3->down;
while (p4)
{
if (type_field (p4->type) == TYPE_CONSTANT)
{
p5 = _asn1_add_node_only (TYPE_CONSTANT);
_asn1_set_name (p5, p4->name);
tlen = strlen (p4->value);
if (tlen > 0)
_asn1_set_value (p5, p4->value, tlen + 1);
if (p2 == p)
{
_asn1_set_right (p5, p->down);
_asn1_set_down (p, p5);
}
else
{
_asn1_set_right (p5, p2->right);
_asn1_set_right (p2, p5);
}
p2 = p5;
}
p4 = p4->right;
}
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_find_up (p);
}
/*******************************/
/* expand DEFAULT */
/*******************************/
p = node;
move = DOWN;
while (!((p == node) && (move == UP)))
{
if (move != UP)
{
if ((type_field (p->type) == TYPE_OBJECT_ID) &&
(p->type & CONST_DEFAULT))
{
p2 = p->down;
if (p2 && (type_field (p2->type) == TYPE_DEFAULT))
{
_asn1_str_cpy (name2, sizeof (name2), name_root);
_asn1_str_cat (name2, sizeof (name2), ".");
_asn1_str_cat (name2, sizeof (name2), p2->value);
p3 = asn1_find_node (node, name2);
if (!p3 || (type_field (p3->type) != TYPE_OBJECT_ID) ||
!(p3->type & CONST_ASSIGN))
return ASN1_ELEMENT_NOT_FOUND;
p4 = p3->down;
name2[0] = 0;
while (p4)
{
if (type_field (p4->type) == TYPE_CONSTANT)
{
if (name2[0])
_asn1_str_cat (name2, sizeof (name2), ".");
_asn1_str_cat (name2, sizeof (name2), p4->value);
}
p4 = p4->right;
}
tlen = strlen (name2);
if (tlen > 0)
_asn1_set_value (p2, name2, tlen + 1);
}
}
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_find_up (p);
}
return ASN1_SUCCESS;
}
/******************************************************************/
/* Function : _asn1_type_set_config */
/* Description: sets the CONST_SET and CONST_NOT_USED properties */
/* in the fields of the SET elements. */
/* Parameters: */
/* node: root of an ASN1 element. */
/* Return: */
/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL, */
/* otherwise ASN1_SUCCESS */
/******************************************************************/
asn1_retCode
_asn1_type_set_config (ASN1_TYPE node)
{
ASN1_TYPE p, p2;
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) == TYPE_SET)
{
p2 = p->down;
while (p2)
{
if (type_field (p2->type) != TYPE_TAG)
p2->type |= CONST_SET | CONST_NOT_USED;
p2 = p2->right;
}
}
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_find_up (p);
}
return ASN1_SUCCESS;
}
/******************************************************************/
/* Function : _asn1_check_identifier */
/* Description: checks the definitions of all the identifiers */
/* and the first element of an OBJECT_ID (e.g. {pkix 0 4}). */
/* The _asn1_identifierMissing global variable is filled if */
/* necessary. */
/* Parameters: */
/* node: root of an ASN1 element. */
/* Return: */
/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL, */
/* ASN1_IDENTIFIER_NOT_FOUND if an identifier is not defined, */
/* otherwise ASN1_SUCCESS */
/******************************************************************/
asn1_retCode
_asn1_check_identifier (ASN1_TYPE node)
{
ASN1_TYPE p, p2;
char name2[ASN1_MAX_NAME_SIZE * 2 + 2];
if (node == NULL)
return ASN1_ELEMENT_NOT_FOUND;
p = node;
while (p)
{
if (type_field (p->type) == TYPE_IDENTIFIER)
{
_asn1_str_cpy (name2, sizeof (name2), node->name);
_asn1_str_cat (name2, sizeof (name2), ".");
_asn1_str_cat (name2, sizeof (name2), p->value);
p2 = asn1_find_node (node, name2);
if (p2 == NULL)
{
strcpy (_asn1_identifierMissing, p->value);
return ASN1_IDENTIFIER_NOT_FOUND;
}
}
else if ((type_field (p->type) == TYPE_OBJECT_ID) &&
(p->type & CONST_DEFAULT))
{
p2 = p->down;
if (p2 && (type_field (p2->type) == TYPE_DEFAULT))
{
_asn1_str_cpy (name2, sizeof (name2), node->name);
_asn1_str_cat (name2, sizeof (name2), ".");
_asn1_str_cat (name2, sizeof (name2), p2->value);
strcpy (_asn1_identifierMissing, p2->value);
p2 = asn1_find_node (node, name2);
if (!p2 || (type_field (p2->type) != TYPE_OBJECT_ID) ||
!(p2->type & CONST_ASSIGN))
return ASN1_IDENTIFIER_NOT_FOUND;
else
_asn1_identifierMissing[0] = 0;
}
}
else if ((type_field (p->type) == TYPE_OBJECT_ID) &&
(p->type & CONST_ASSIGN))
{
p2 = p->down;
if (p2 && (type_field (p2->type) == TYPE_CONSTANT))
{
if (p2->value && !isdigit (p2->value[0]))
{
_asn1_str_cpy (name2, sizeof (name2), node->name);
_asn1_str_cat (name2, sizeof (name2), ".");
_asn1_str_cat (name2, sizeof (name2), p2->value);
strcpy (_asn1_identifierMissing, p2->value);
p2 = asn1_find_node (node, name2);
if (!p2 || (type_field (p2->type) != TYPE_OBJECT_ID) ||
!(p2->type & CONST_ASSIGN))
return ASN1_IDENTIFIER_NOT_FOUND;
else
_asn1_identifierMissing[0] = 0;
}
}
}
if (p->down)
{
p = p->down;
}
else if (p->right)
p = p->right;
else
{
while (1)
{
p = _asn1_find_up (p);
if (p == node)
{
p = NULL;
break;
}
if (p->right)
{
p = p->right;
break;
}
}
}
}
return ASN1_SUCCESS;
}
/******************************************************************/
/* Function : _asn1_set_default_tag */
/* Description: sets the default IMPLICIT or EXPLICIT property in */
/* the tagged elements that don't have this declaration. */
/* Parameters: */
/* node: pointer to a DEFINITIONS element. */
/* Return: */
/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL or not a pointer to */
/* a DEFINITIONS element, */
/* otherwise ASN1_SUCCESS */
/******************************************************************/
asn1_retCode
_asn1_set_default_tag (ASN1_TYPE node)
{
ASN1_TYPE p;
if ((node == NULL) || (type_field (node->type) != TYPE_DEFINITIONS))
return ASN1_ELEMENT_NOT_FOUND;
p = node;
while (p)
{
if ((type_field (p->type) == TYPE_TAG) &&
!(p->type & CONST_EXPLICIT) && !(p->type & CONST_IMPLICIT))
{
if (node->type & CONST_EXPLICIT)
p->type |= CONST_EXPLICIT;
else
p->type |= CONST_IMPLICIT;
}
if (p->down)
{
p = p->down;
}
else if (p->right)
p = p->right;
else
{
while (1)
{
p = _asn1_find_up (p);
if (p == node)
{
p = NULL;
break;
}
if (p->right)
{
p = p->right;
break;
}
}
}
}
return ASN1_SUCCESS;
}
static const char *
parse_version_number (const char *s, int *number)
{
int val = 0;
if (*s == '0' && isdigit (s[1]))
return NULL; /* leading zeros are not allowed */
for (; isdigit (*s); s++)
{
val *= 10;
val += *s - '0';
}
*number = val;
return val < 0 ? NULL : s;
}
/* The parse version functions were copied from libgcrypt.
*/
static const char *
parse_version_string (const char *s, int *major, int *minor, int *micro)
{
s = parse_version_number (s, major);
if (!s || *s != '.')
return NULL;
s++;
s = parse_version_number (s, minor);
if (!s)
return NULL;
if (*s != '.')
{
*micro = 0;
return s;
}
s++;
s = parse_version_number (s, micro);
if (!s)
return NULL;
return s; /* patchlevel */
}
/**
* asn1_check_version - check for library version
* @req_version: Required version number, or NULL.
*
* Check that the version of the library is at minimum the
* requested one and return the version string; return %NULL if the
* condition is not satisfied. If a %NULL is passed to this function,
* no check is done, but the version string is simply returned.
*
* See %ASN1_VERSION for a suitable @req_version string.
*
* Return value: Version string of run-time library, or %NULL if the
* run-time library does not meet the required version number.
*/
const char *
asn1_check_version (const char *req_version)
{
const char *ver = ASN1_VERSION;
int my_major, my_minor, my_micro;
int rq_major, rq_minor, rq_micro;
const char *my_plvl, *rq_plvl;
if (!req_version)
return ver;
my_plvl = parse_version_string (ver, &my_major, &my_minor, &my_micro);
if (!my_plvl)
return NULL; /* very strange our own version is bogus */
rq_plvl = parse_version_string (req_version, &rq_major, &rq_minor,
&rq_micro);
if (!rq_plvl)
return NULL; /* req version string is invalid */
if (my_major > rq_major
|| (my_major == rq_major && my_minor > rq_minor)
|| (my_major == rq_major && my_minor == rq_minor
&& my_micro > rq_micro)
|| (my_major == rq_major && my_minor == rq_minor
&& my_micro == rq_micro && strcmp (my_plvl, rq_plvl) >= 0))
{
return ver;
}
return NULL;
}
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