return result;
}
-#define FOUND 1
-#define SAME_BRANCH 2
-#define OTHER_BRANCH 3
-#define EXIT 4
-
/**
* asn1_der_decoding_element:
* @structure: pointer to an ASN1 structure
* @errorDescription: null-terminated string contains details when an
* error occurred.
*
- * Fill the element named @ELEMENTNAME with values of a DER encoding
+ * Fill the element named @elementName with values of a DER encoding
* string. The structure must just be created with function
* asn1_create_element(). The DER vector must contain the encoding
- * string of the whole @STRUCTURE. If an error occurs during the
- * decoding procedure, the *@STRUCTURE is deleted and set equal to
+ * string of the whole @structure. If an error occurs during the
+ * decoding procedure, the *@structure is deleted and set equal to
* %NULL.
*
+ * As of libtasn1 3.6 this function is an alias of asn1_der_decoding().
+ *
* Returns: %ASN1_SUCCESS if DER encoding OK, %ASN1_ELEMENT_NOT_FOUND
* if ELEMENT is %NULL or @elementName == NULL, and
* %ASN1_TAG_ERROR or %ASN1_DER_ERROR if the der encoding doesn't
asn1_der_decoding_element (asn1_node * structure, const char *elementName,
const void *ider, int len, char *errorDescription)
{
- asn1_node node, p, p2, p3, nodeFound = NULL;
- char temp[128], currentName[ASN1_MAX_NAME_SIZE * 10], *dot_p, *char_p;
- int nameLen = ASN1_MAX_NAME_SIZE * 10 - 1, state;
- int counter, len2, len3, len4, move, ris, tlen;
- unsigned char class;
- unsigned long tag;
- int indefinite, result;
- const unsigned char *der = ider;
-
- node = *structure;
-
- if (node == NULL)
- return ASN1_ELEMENT_NOT_FOUND;
-
- if (elementName == NULL)
- {
- result = ASN1_ELEMENT_NOT_FOUND;
- goto cleanup;
- }
-
- if (node->type & CONST_OPTION)
- {
- result = ASN1_GENERIC_ERROR;
- goto cleanup;
- }
-
- if ((*structure)->name[0] != 0)
- { /* Has *structure got a name? */
- nameLen -= strlen ((*structure)->name);
- if (nameLen > 0)
- strcpy (currentName, (*structure)->name);
- else
- {
- result = ASN1_MEM_ERROR;
- goto cleanup;
- }
- if (!(strcmp (currentName, elementName)))
- {
- state = FOUND;
- nodeFound = *structure;
- }
- else if (!memcmp (currentName, elementName, strlen (currentName)))
- state = SAME_BRANCH;
- else
- state = OTHER_BRANCH;
- }
- else
- { /* *structure doesn't have a name? */
- currentName[0] = 0;
- if (elementName[0] == 0)
- {
- state = FOUND;
- nodeFound = *structure;
- }
- else
- {
- state = SAME_BRANCH;
- }
- }
-
- counter = 0;
- move = DOWN;
- p = node;
- while (1)
- {
-
- ris = ASN1_SUCCESS;
-
- if (move != UP)
- {
- if (p->type & CONST_SET)
- {
- p2 = _asn1_find_up (p);
- len2 = _asn1_strtol (p2->value, NULL, 10);
- if (counter == len2)
- {
- p = p2;
- move = UP;
- continue;
- }
- else if (counter > len2)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- p2 = p2->down;
- while (p2)
- {
- if ((p2->type & CONST_SET) && (p2->type & CONST_NOT_USED))
- {
- ris =
- extract_tag_der_recursive (p2, der + counter,
- len - counter, &len2);
- if (ris == ASN1_SUCCESS)
- {
- p2->type &= ~CONST_NOT_USED;
- p = p2;
- break;
- }
- }
- p2 = p2->right;
- }
- if (p2 == NULL)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- }
-
- if ((p->type & CONST_OPTION) || (p->type & CONST_DEFAULT))
- {
- p2 = _asn1_find_up (p);
- len2 = _asn1_strtol (p2->value, NULL, 10);
- if (counter == len2)
- {
- if (p->right)
- {
- p2 = p->right;
- move = RIGHT;
- }
- else
- move = UP;
-
- if (p->type & CONST_OPTION)
- asn1_delete_structure (&p);
-
- p = p2;
- continue;
- }
- }
-
- if (type_field (p->type) == ASN1_ETYPE_CHOICE)
- {
- while (p->down)
- {
- if (counter < len)
- ris =
- _asn1_extract_tag_der (p->down, der + counter,
- len - counter, &len2);
- else
- ris = ASN1_DER_ERROR;
- if (ris == ASN1_SUCCESS)
- {
- delete_unneeded_choice_fields(p->down);
- break;
- }
- else if (ris == ASN1_ERROR_TYPE_ANY)
- {
- result = ASN1_ERROR_TYPE_ANY;
- goto cleanup;
- }
- else
- {
- p2 = p->down;
- asn1_delete_structure (&p2);
- }
- }
-
- if (p->down == NULL)
- {
- if (!(p->type & CONST_OPTION))
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- }
- else if (type_field (p->type) != ASN1_ETYPE_CHOICE)
- p = p->down;
- }
-
- if ((p->type & CONST_OPTION) || (p->type & CONST_DEFAULT))
- {
- p2 = _asn1_find_up (p);
- len2 = _asn1_strtol (p2->value, NULL, 10);
- if (counter > len2)
- ris = ASN1_TAG_ERROR;
- }
-
- if (ris == ASN1_SUCCESS)
- ris =
- _asn1_extract_tag_der (p, der + counter, len - counter, &len2);
- if (ris != ASN1_SUCCESS)
- {
- if (p->type & CONST_OPTION)
- {
- p->type |= CONST_NOT_USED;
- move = RIGHT;
- }
- else if (p->type & CONST_DEFAULT)
- {
- _asn1_set_value (p, NULL, 0);
- move = RIGHT;
- }
- else
- {
- if (errorDescription != NULL)
- _asn1_error_description_tag_error (p, errorDescription);
-
- result = ASN1_TAG_ERROR;
- goto cleanup;
- }
- }
- else
- counter += len2;
- }
-
- if (ris == ASN1_SUCCESS)
- {
- switch (type_field (p->type))
- {
- case ASN1_ETYPE_NULL:
- if (der[counter])
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- if (p == nodeFound)
- state = EXIT;
-
- counter++;
- move = RIGHT;
- break;
- case ASN1_ETYPE_BOOLEAN:
- if (der[counter++] != 1)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- if (state == FOUND)
- {
- if (der[counter++] == 0)
- _asn1_set_value (p, "F", 1);
- else
- _asn1_set_value (p, "T", 1);
-
- if (p == nodeFound)
- state = EXIT;
-
- }
- else
- counter++;
-
- move = RIGHT;
- break;
- case ASN1_ETYPE_INTEGER:
- case ASN1_ETYPE_ENUMERATED:
- len2 =
- asn1_get_length_der (der + counter, len - counter, &len3);
- if (len2 < 0)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- if (state == FOUND)
- {
- if (len3 + len2 > len - counter)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- _asn1_set_value (p, der + counter, len3 + len2);
-
- if (p == nodeFound)
- state = EXIT;
- }
- counter += len3 + len2;
- move = RIGHT;
- break;
- case ASN1_ETYPE_OBJECT_ID:
- if (state == FOUND)
- {
- result =
- _asn1_get_objectid_der (der + counter, len - counter,
- &len2, temp, sizeof (temp));
- if (result != ASN1_SUCCESS)
- goto cleanup;
-
- tlen = strlen (temp);
-
- if (tlen > 0)
- _asn1_set_value (p, temp, tlen + 1);
-
- if (p == nodeFound)
- state = EXIT;
- }
- else
- {
- len2 =
- asn1_get_length_der (der + counter, len - counter, &len3);
- if (len2 < 0)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- len2 += len3;
- }
-
- counter += len2;
- move = RIGHT;
- break;
- case ASN1_ETYPE_GENERALIZED_TIME:
- case ASN1_ETYPE_UTC_TIME:
- if (state == FOUND)
- {
- result =
- _asn1_get_time_der (der + counter, len - counter, &len2,
- temp, sizeof (temp) - 1);
- if (result != ASN1_SUCCESS)
- goto cleanup;
-
- tlen = strlen (temp);
- if (tlen > 0)
- _asn1_set_value (p, temp, tlen + 1);
-
- if (p == nodeFound)
- state = EXIT;
- }
- else
- {
- len2 =
- asn1_get_length_der (der + counter, len - counter, &len3);
- if (len2 < 0)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- len2 += len3;
- }
-
- counter += len2;
- move = RIGHT;
- break;
- case ASN1_ETYPE_OCTET_STRING:
- len3 = len - counter;
- if (state == FOUND)
- {
- result = _asn1_get_octet_string (der + counter, p, &len3);
- if (p == nodeFound)
- state = EXIT;
- }
- else
- result = _asn1_get_octet_string (der + counter, NULL, &len3);
-
- if (result != ASN1_SUCCESS)
- goto cleanup;
-
- counter += len3;
- move = RIGHT;
- 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_BMP_STRING:
- case ASN1_ETYPE_UTF8_STRING:
- case ASN1_ETYPE_VISIBLE_STRING:
- case ASN1_ETYPE_BIT_STRING:
- len2 =
- asn1_get_length_der (der + counter, len - counter, &len3);
- if (len2 < 0)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- if (state == FOUND)
- {
- if (len3 + len2 > len - counter)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- _asn1_set_value (p, der + counter, len3 + len2);
-
- if (p == nodeFound)
- state = EXIT;
- }
- counter += len3 + len2;
- move = RIGHT;
- break;
- case ASN1_ETYPE_SEQUENCE:
- case ASN1_ETYPE_SET:
- if (move == UP)
- {
- len2 = _asn1_strtol (p->value, NULL, 10);
- _asn1_set_value (p, NULL, 0);
- if (len2 == -1)
- { /* indefinite length method */
- if ((der[counter]) || der[counter + 1])
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- counter += 2;
- }
- else
- { /* definite length method */
- if (len2 != counter)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- }
- if (p == nodeFound)
- state = EXIT;
- move = RIGHT;
- }
- else
- { /* move==DOWN || move==RIGHT */
- if (state == OTHER_BRANCH)
- {
- len3 =
- asn1_get_length_der (der + counter, len - counter,
- &len2);
- if (len3 < 0)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- counter += len2 + len3;
- move = RIGHT;
- }
- else
- { /* state==SAME_BRANCH or state==FOUND */
- len3 =
- asn1_get_length_der (der + counter, len - counter,
- &len2);
- if (len3 < 0)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- counter += len2;
- if (len3 > 0)
- {
- _asn1_ltostr (counter + len3, temp);
- tlen = strlen (temp);
-
- if (tlen > 0)
- _asn1_set_value (p, temp, tlen + 1);
- move = DOWN;
- }
- else if (len3 == 0)
- {
- p2 = p->down;
- while (p2)
- {
- if (type_field (p2->type) != ASN1_ETYPE_TAG)
- {
- p3 = p2->right;
- asn1_delete_structure (&p2);
- p2 = p3;
- }
- else
- p2 = p2->right;
- }
- move = RIGHT;
- }
- else
- { /* indefinite length method */
- _asn1_set_value (p, "-1", 3);
- move = DOWN;
- }
- }
- }
- break;
- case ASN1_ETYPE_SEQUENCE_OF:
- case ASN1_ETYPE_SET_OF:
- if (move == UP)
- {
- len2 = _asn1_strtol (p->value, NULL, 10);
- if (len2 > counter)
- {
- _asn1_append_sequence_set (p);
- p = p->down;
- while (p->right)
- p = p->right;
- move = RIGHT;
- continue;
- }
- _asn1_set_value (p, NULL, 0);
- if (len2 != counter)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- if (p == nodeFound)
- state = EXIT;
- }
- else
- { /* move==DOWN || move==RIGHT */
- if (state == OTHER_BRANCH)
- {
- len3 =
- asn1_get_length_der (der + counter, len - counter,
- &len2);
- if (len3 < 0)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- counter += len2 + len3;
- move = RIGHT;
- }
- else
- { /* state==FOUND or state==SAME_BRANCH */
- len3 =
- asn1_get_length_der (der + counter, len - counter,
- &len2);
- if (len3 < 0)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- counter += len2;
- if (len3)
- {
- _asn1_ltostr (counter + len3, temp);
- tlen = strlen (temp);
-
- if (tlen > 0)
- _asn1_set_value (p, temp, tlen + 1);
- p2 = p->down;
- while ((type_field (p2->type) == ASN1_ETYPE_TAG)
- || (type_field (p2->type) ==
- ASN1_ETYPE_SIZE))
- p2 = p2->right;
- if (p2->right == NULL)
- _asn1_append_sequence_set (p);
- p = p2;
- state = FOUND;
- }
- }
- }
-
- break;
- case ASN1_ETYPE_ANY:
- if (asn1_get_tag_der
- (der + counter, len - counter, &class, &len2,
- &tag) != ASN1_SUCCESS)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- if (counter + len2 > len)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- len4 =
- asn1_get_length_der (der + counter + len2,
- len - counter - len2, &len3);
- if (len4 < -1)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- if (len4 != -1)
- {
- len2 += len4;
- if (state == FOUND)
- {
- _asn1_set_value_lv (p, der + counter, len2 + len3);
-
- if (p == nodeFound)
- state = EXIT;
- }
- counter += len2 + len3;
- }
- else
- { /* indefinite length */
- /* Check indefinite lenth method in an EXPLICIT TAG */
- if ((p->type & CONST_TAG) && (der[counter - 1] == 0x80))
- indefinite = 1;
- else
- indefinite = 0;
-
- len2 = len - counter;
- result =
- _asn1_get_indefinite_length_string (der + counter, &len2);
- if (result != ASN1_SUCCESS)
- goto cleanup;
-
- if (state == FOUND)
- {
- _asn1_set_value_lv (p, der + counter, len2);
-
- if (p == nodeFound)
- state = EXIT;
- }
-
- counter += len2;
-
- /* Check if a couple of 0x00 are present due to an EXPLICIT TAG with
- an indefinite length method. */
- if (indefinite)
- {
- if (!der[counter] && !der[counter + 1])
- {
- counter += 2;
- }
- else
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
- }
- }
- move = RIGHT;
- break;
-
- default:
- move = (move == UP) ? RIGHT : DOWN;
- break;
- }
- }
-
- if ((p == node && move != DOWN) || (state == EXIT))
- break;
-
- if (move == DOWN)
- {
- if (p->down)
- {
- p = p->down;
-
- if (state != FOUND)
- {
- nameLen -= strlen (p->name) + 1;
- if (nameLen > 0)
- {
- if (currentName[0])
- strcat (currentName, ".");
- strcat (currentName, p->name);
- }
- else
- {
- result = ASN1_MEM_ERROR;
- goto cleanup;
- }
- if (!(strcmp (currentName, elementName)))
- {
- state = FOUND;
- nodeFound = p;
- }
- else
- if (!memcmp
- (currentName, elementName, strlen (currentName)))
- state = SAME_BRANCH;
- else
- state = OTHER_BRANCH;
- }
- }
- else
- move = RIGHT;
- }
-
- if ((move == RIGHT) && !(p->type & CONST_SET))
- {
- if (p->right)
- {
- p = p->right;
-
- if (state != FOUND)
- {
- dot_p = char_p = currentName;
- while ((char_p = strchr (char_p, '.')))
- {
- dot_p = char_p++;
- dot_p++;
- }
-
- nameLen += strlen (currentName) - (dot_p - currentName);
- *dot_p = 0;
-
- nameLen -= strlen (p->name);
- if (nameLen > 0)
- strcat (currentName, p->name);
- else
- {
- result = ASN1_MEM_ERROR;
- goto cleanup;
- }
-
- if (!(strcmp (currentName, elementName)))
- {
- state = FOUND;
- nodeFound = p;
- }
- else
- if (!memcmp
- (currentName, elementName, strlen (currentName)))
- state = SAME_BRANCH;
- else
- state = OTHER_BRANCH;
- }
- }
- else
- move = UP;
- }
-
- if (move == UP)
- {
- p = _asn1_find_up (p);
-
- if (state != FOUND)
- {
- dot_p = char_p = currentName;
- while ((char_p = strchr (char_p, '.')))
- {
- dot_p = char_p++;
- dot_p++;
- }
-
- nameLen += strlen (currentName) - (dot_p - currentName);
- *dot_p = 0;
-
- if (!(strcmp (currentName, elementName)))
- {
- state = FOUND;
- nodeFound = p;
- }
- else
- if (!memcmp (currentName, elementName, strlen (currentName)))
- state = SAME_BRANCH;
- else
- state = OTHER_BRANCH;
- }
- }
- }
-
- _asn1_delete_not_used (*structure);
-
- if (counter > len)
- {
- result = ASN1_DER_ERROR;
- goto cleanup;
- }
-
- return ASN1_SUCCESS;
-
-cleanup:
- asn1_delete_structure (structure);
- return result;
+ return asn1_der_decoding(structure, ider, len, errorDescription);
}
/**
projects / platform / upstream / libtasn1.git / commitdiff