mirror of
https://github.com/openssl/openssl.git
synced 2024-12-21 06:09:35 +08:00
e5d4233fbd
Internally, we still need this function, so we make it internal and then add a new ERR_get_state() that simply calls the internal variant, unless it's "removed" by configuration. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/9462)
132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
/*
|
|
* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
* https://www.openssl.org/source/license.html
|
|
* or in the file LICENSE in the source distribution.
|
|
*/
|
|
|
|
/*
|
|
* Confirm that if (d, r) = a / b, then b * d + r == a, and that sign(d) ==
|
|
* sign(a), and 0 <= r <= b
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <openssl/bn.h>
|
|
#include <openssl/err.h>
|
|
#include "fuzzer.h"
|
|
|
|
/* 256 kB */
|
|
#define MAX_LEN (256 * 1000)
|
|
|
|
static BN_CTX *ctx;
|
|
static BIGNUM *b1;
|
|
static BIGNUM *b2;
|
|
static BIGNUM *b3;
|
|
static BIGNUM *b4;
|
|
static BIGNUM *b5;
|
|
|
|
int FuzzerInitialize(int *argc, char ***argv)
|
|
{
|
|
b1 = BN_new();
|
|
b2 = BN_new();
|
|
b3 = BN_new();
|
|
b4 = BN_new();
|
|
b5 = BN_new();
|
|
ctx = BN_CTX_new();
|
|
|
|
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
|
|
ERR_clear_error();
|
|
|
|
return 1;
|
|
}
|
|
|
|
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
|
|
{
|
|
int success = 0;
|
|
size_t l1 = 0, l2 = 0;
|
|
/* s1 and s2 will be the signs for b1 and b2. */
|
|
int s1 = 0, s2 = 0;
|
|
|
|
/* limit the size of the input to avoid timeout */
|
|
if (len > MAX_LEN)
|
|
len = MAX_LEN;
|
|
|
|
/* We are going to split the buffer in two, sizes l1 and l2, giving b1 and
|
|
* b2.
|
|
*/
|
|
if (len > 0) {
|
|
--len;
|
|
/* Use first byte to divide the remaining buffer into 3Fths. I admit
|
|
* this disallows some number sizes. If it matters, better ideas are
|
|
* welcome (Ben).
|
|
*/
|
|
l1 = ((buf[0] & 0x3f) * len) / 0x3f;
|
|
s1 = buf[0] & 0x40;
|
|
s2 = buf[0] & 0x80;
|
|
++buf;
|
|
l2 = len - l1;
|
|
}
|
|
OPENSSL_assert(BN_bin2bn(buf, l1, b1) == b1);
|
|
BN_set_negative(b1, s1);
|
|
OPENSSL_assert(BN_bin2bn(buf + l1, l2, b2) == b2);
|
|
BN_set_negative(b2, s2);
|
|
|
|
/* divide by 0 is an error */
|
|
if (BN_is_zero(b2)) {
|
|
success = 1;
|
|
goto done;
|
|
}
|
|
|
|
OPENSSL_assert(BN_div(b3, b4, b1, b2, ctx));
|
|
if (BN_is_zero(b1))
|
|
success = BN_is_zero(b3) && BN_is_zero(b4);
|
|
else if (BN_is_negative(b1))
|
|
success = (BN_is_negative(b3) != BN_is_negative(b2) || BN_is_zero(b3))
|
|
&& (BN_is_negative(b4) || BN_is_zero(b4));
|
|
else
|
|
success = (BN_is_negative(b3) == BN_is_negative(b2) || BN_is_zero(b3))
|
|
&& (!BN_is_negative(b4) || BN_is_zero(b4));
|
|
OPENSSL_assert(BN_mul(b5, b3, b2, ctx));
|
|
OPENSSL_assert(BN_add(b5, b5, b4));
|
|
|
|
success = success && BN_cmp(b5, b1) == 0;
|
|
if (!success) {
|
|
BN_print_fp(stdout, b1);
|
|
putchar('\n');
|
|
BN_print_fp(stdout, b2);
|
|
putchar('\n');
|
|
BN_print_fp(stdout, b3);
|
|
putchar('\n');
|
|
BN_print_fp(stdout, b4);
|
|
putchar('\n');
|
|
BN_print_fp(stdout, b5);
|
|
putchar('\n');
|
|
printf("%d %d %d %d %d %d %d\n", BN_is_negative(b1),
|
|
BN_is_negative(b2),
|
|
BN_is_negative(b3), BN_is_negative(b4), BN_is_zero(b4),
|
|
BN_is_negative(b3) != BN_is_negative(b2)
|
|
&& (BN_is_negative(b4) || BN_is_zero(b4)),
|
|
BN_cmp(b5, b1));
|
|
puts("----\n");
|
|
}
|
|
|
|
done:
|
|
OPENSSL_assert(success);
|
|
ERR_clear_error();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void FuzzerCleanup(void)
|
|
{
|
|
BN_free(b1);
|
|
BN_free(b2);
|
|
BN_free(b3);
|
|
BN_free(b4);
|
|
BN_free(b5);
|
|
BN_CTX_free(ctx);
|
|
}
|