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/*
* Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/* Regression tests for ASN.1 parsing bugs. */
#include <stdio.h>
#include <string.h>
#include "testutil.h"
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "internal/nelem.h"
static const ASN1_ITEM *item_type;
static const char *test_file;
typedef enum {
ASN1_UNKNOWN,
ASN1_OK,
ASN1_BIO,
ASN1_DECODE,
ASN1_ENCODE,
ASN1_COMPARE
} expected_error_t;
typedef struct {
const char *str;
expected_error_t code;
} error_enum;
static expected_error_t expected_error = ASN1_UNKNOWN;
static int test_bad_asn1(void)
{
BIO *bio = NULL;
ASN1_VALUE *value = NULL;
int ret = 0;
unsigned char buf[2048];
const unsigned char *buf_ptr = buf;
unsigned char *der = NULL;
int derlen;
int len;
bio = BIO_new_file(test_file, "r");
if (!TEST_ptr(bio))
return 0;
if (expected_error == ASN1_BIO) {
if (TEST_ptr_null(ASN1_item_d2i_bio(item_type, bio, NULL)))
ret = 1;
goto err;
}
/*
* Unless we are testing it we don't use ASN1_item_d2i_bio because it
* performs sanity checks on the input and can reject it before the
* decoder is called.
*/
len = BIO_read(bio, buf, sizeof(buf));
if (!TEST_int_ge(len, 0))
goto err;
value = ASN1_item_d2i(NULL, &buf_ptr, len, item_type);
if (value == NULL) {
if (TEST_int_eq(expected_error, ASN1_DECODE))
ret = 1;
goto err;
}
derlen = ASN1_item_i2d(value, &der, item_type);
if (der == NULL || derlen < 0) {
if (TEST_int_eq(expected_error, ASN1_ENCODE))
ret = 1;
goto err;
}
if (derlen != len || memcmp(der, buf, derlen) != 0) {
if (TEST_int_eq(expected_error, ASN1_COMPARE))
ret = 1;
goto err;
}
if (TEST_int_eq(expected_error, ASN1_OK))
ret = 1;
err:
/* Don't indicate success for memory allocation errors */
if (ret == 1
&& !TEST_false(ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE))
ret = 0;
BIO_free(bio);
OPENSSL_free(der);
ASN1_item_free(value, item_type);
return ret;
}
/*
* Usage: d2i_test <name> <type> <file>, e.g.
* d2i_test generalname bad_generalname.der
*/
int setup_tests(void)
{
const char *test_type_name;
const char *expected_error_string;
size_t i;
static error_enum expected_errors[] = {
{"OK", ASN1_OK},
{"BIO", ASN1_BIO},
{"decode", ASN1_DECODE},
{"encode", ASN1_ENCODE},
{"compare", ASN1_COMPARE}
};
if (!TEST_ptr(test_type_name = test_get_argument(0))
|| !TEST_ptr(expected_error_string = test_get_argument(1))
|| !TEST_ptr(test_file = test_get_argument(2))) {
TEST_note("Usage: d2i_test item_name expected_error file.der");
return 0;
}
item_type = ASN1_ITEM_lookup(test_type_name);
if (item_type == NULL) {
TEST_error("Unknown type %s", test_type_name);
TEST_note("Supported types:");
for (i = 0;; i++) {
const ASN1_ITEM *it = ASN1_ITEM_get(i);
if (it == NULL)
break;
TEST_note("\t%s", it->sname);
}
return 0;
}
for (i = 0; i < OSSL_NELEM(expected_errors); i++) {
if (strcmp(expected_errors[i].str, expected_error_string) == 0) {
expected_error = expected_errors[i].code;
break;
}
}
if (expected_error == ASN1_UNKNOWN) {
TEST_error("Unknown expected error %s\n", expected_error_string);
return 0;
}
ADD_TEST(test_bad_asn1);
return 1;
}
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