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/*
* Copyright 2016 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>
#ifndef OPENSSL_NO_CMS
# include <openssl/cms.h>
#endif
#include "e_os.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;
typedef struct d2i_test_fixture {
const char *test_case_name;
} D2I_TEST_FIXTURE;
static D2I_TEST_FIXTURE set_up(const char *const test_case_name)
{
D2I_TEST_FIXTURE fixture;
fixture.test_case_name = test_case_name;
return fixture;
}
static int execute_test(D2I_TEST_FIXTURE fixture)
{
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;
if ((bio = BIO_new_file(test_file, "r")) == NULL)
return 0;
if (expected_error == ASN1_BIO) {
value = ASN1_item_d2i_bio(item_type, bio, NULL);
if (value == 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 (len < 0)
goto err;
value = ASN1_item_d2i(NULL, &buf_ptr, len, item_type);
if (value == NULL) {
if (expected_error == ASN1_DECODE)
ret = 1;
goto err;
}
derlen = ASN1_item_i2d(value, &der, item_type);
if (der == NULL || derlen < 0) {
if (expected_error == ASN1_ENCODE)
ret = 1;
goto err;
}
if (derlen != len || memcmp(der, buf, derlen) != 0) {
if (expected_error == ASN1_COMPARE)
ret = 1;
goto err;
}
if (expected_error == ASN1_OK)
ret = 1;
err:
/* Don't indicate success for memory allocation errors */
if (ret == 1 && 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;
}
static void tear_down(D2I_TEST_FIXTURE fixture)
{
ERR_print_errors_fp(stderr);
}
#define SETUP_D2I_TEST_FIXTURE() \
SETUP_TEST_FIXTURE(D2I_TEST_FIXTURE, set_up)
#define EXECUTE_D2I_TEST() \
EXECUTE_TEST(execute_test, tear_down)
static int test_bad_asn1()
{
SETUP_D2I_TEST_FIXTURE();
EXECUTE_D2I_TEST();
}
/*
* Usage: d2i_test <type> <file>, e.g.
* d2i_test generalname bad_generalname.der
*/
int main(int argc, char **argv)
{
int result = 0;
const char *test_type_name;
const char *expected_error_string;
const char *p = getenv("OPENSSL_DEBUG_MEMORY");
size_t i;
static ASN1_ITEM_EXP *items[] = {
ASN1_ITEM_ref(ASN1_ANY),
ASN1_ITEM_ref(X509),
ASN1_ITEM_ref(GENERAL_NAME),
ASN1_ITEM_ref(ASN1_INTEGER),
#ifndef OPENSSL_NO_CMS
ASN1_ITEM_ref(CMS_ContentInfo)
#endif
};
static error_enum expected_errors[] = {
{"OK", ASN1_OK},
{"BIO", ASN1_BIO},
{"decode", ASN1_DECODE},
{"encode", ASN1_ENCODE},
{"compare", ASN1_COMPARE}
};
if (p != NULL && strcmp(p, "on") == 0)
CRYPTO_set_mem_debug(1);
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
if (argc != 4) {
fprintf(stderr,
"Usage: d2i_test item_name expected_error file.der\n");
return 1;
}
test_type_name = argv[1];
expected_error_string = argv[2];
test_file = argv[3];
for (i = 0; i < OSSL_NELEM(items); i++) {
const ASN1_ITEM *it = ASN1_ITEM_ptr(items[i]);
if (strcmp(test_type_name, it->sname) == 0) {
item_type = it;
break;
}
}
if (item_type == NULL) {
fprintf(stderr, "Unknown type %s\n", test_type_name);
fprintf(stderr, "Supported types:\n");
for (i = 0; i < OSSL_NELEM(items); i++) {
const ASN1_ITEM *it = ASN1_ITEM_ptr(items[i]);
fprintf(stderr, "\t%s\n", it->sname);
}
return 1;
}
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) {
fprintf(stderr, "Unknown expected error %s\n", expected_error_string);
return 1;
}
ADD_TEST(test_bad_asn1);
result = run_tests(argv[0]);
#ifndef OPENSSL_NO_CRYPTO_MDEBUG
if (CRYPTO_mem_leaks_fp(stderr) <= 0)
result = 1;
#endif
return result;
}
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