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Revision 098f27f9ef8be2a418f76896ee3c824e8709fcf7 authored by Matt Caswell on 17 October 2023, 13:55:48 UTC, committed by Tomas Mraz on 19 October 2023, 09:54:44 UTC
Ignore ping deadline when calculating tick deadline if we can't send
If the CC TX allowance is zero then we cannot send a PING frame at the
moment, so do not take into account the ping deadline when calculating the
tick deadline in that case.

This avoids the hang found by the fuzzer mentioned in
https://github.com/openssl/openssl/pull/22368#issuecomment-1765131727

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22410)
1 parent 56e3032
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  • test
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  • ecstresstest.c
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ecstresstest.c
/*
 * Copyright 2017-2021 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.
 */

#include "internal/nelem.h"
#include "testutil.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#define NUM_REPEATS "1000000"

static ossl_intmax_t num_repeats;
static int print_mode = 0;

#ifndef OPENSSL_NO_EC
# include <openssl/ec.h>
# include <openssl/err.h>
# include <openssl/obj_mac.h>
# include <openssl/objects.h>
# include <openssl/rand.h>
# include <openssl/bn.h>
# include <openssl/opensslconf.h>

static const char *kP256DefaultResult =
    "A1E24B223B8E81BC1FFF99BAFB909EDB895FACDE7D6DA5EF5E7B3255FB378E0F";

/*
 * Perform a deterministic walk on the curve, by starting from |point| and
 * using the X-coordinate of the previous point as the next scalar for
 * point multiplication.
 * Returns the X-coordinate of the end result or NULL on error.
 */
static BIGNUM *walk_curve(const EC_GROUP *group, EC_POINT *point,
                          ossl_intmax_t num)
{
    BIGNUM *scalar = NULL;
    ossl_intmax_t i;

    if (!TEST_ptr(scalar = BN_new())
            || !TEST_true(EC_POINT_get_affine_coordinates(group, point, scalar,
                                                          NULL, NULL)))
        goto err;

    for (i = 0; i < num; i++) {
        if (!TEST_true(EC_POINT_mul(group, point, NULL, point, scalar, NULL))
                || !TEST_true(EC_POINT_get_affine_coordinates(group, point,
                                                              scalar,
                                                              NULL, NULL)))
            goto err;
    }
    return scalar;

err:
    BN_free(scalar);
    return NULL;
}

static int test_curve(void)
{
    EC_GROUP *group = NULL;
    EC_POINT *point = NULL;
    BIGNUM *result = NULL, *expected_result = NULL;
    int ret = 0;

    /*
     * We currently hard-code P-256, though adaptation to other curves.
     * would be straightforward.
     */
    if (!TEST_ptr(group = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1))
            || !TEST_ptr(point = EC_POINT_dup(EC_GROUP_get0_generator(group),
                                              group))
            || !TEST_ptr(result = walk_curve(group, point, num_repeats)))
        return 0;

    if (print_mode) {
        BN_print(bio_out, result);
        BIO_printf(bio_out, "\n");
        ret = 1;
    } else {
        if (!TEST_true(BN_hex2bn(&expected_result, kP256DefaultResult))
                || !TEST_ptr(expected_result)
                || !TEST_BN_eq(result, expected_result))
            goto err;
        ret = 1;
    }

err:
    EC_GROUP_free(group);
    EC_POINT_free(point);
    BN_free(result);
    BN_free(expected_result);
    return ret;
}
#endif

typedef enum OPTION_choice {
    OPT_ERR = -1,
    OPT_EOF = 0,
    OPT_NUM_REPEATS,
    OPT_TEST_ENUM
} OPTION_CHOICE;

const OPTIONS *test_get_options(void)
{
    static const OPTIONS test_options[] = {
        OPT_TEST_OPTIONS_DEFAULT_USAGE,
        { "num", OPT_NUM_REPEATS, 'M', "Number of repeats" },
        { NULL }
    };
    return test_options;
}

/*
 * Stress test the curve. If the '-num' argument is given, runs the loop
 * |num| times and prints the resulting X-coordinate. Otherwise runs the test
 * the default number of times and compares against the expected result.
 */
int setup_tests(void)
{
    OPTION_CHOICE o;

    if (!opt_intmax(NUM_REPEATS, &num_repeats)) {
        TEST_error("Cannot parse " NUM_REPEATS);
        return 0;
    }

    while ((o = opt_next()) != OPT_EOF) {
        switch (o) {
        case OPT_NUM_REPEATS:
            if (!opt_intmax(opt_arg(), &num_repeats)
                    || num_repeats < 0)
                return 0;
            print_mode = 1;
            break;
        case OPT_TEST_CASES:
           break;
        default:
        case OPT_ERR:
            return 0;
        }
    }

#ifndef OPENSSL_NO_EC
    ADD_TEST(test_curve);
#endif
    return 1;
}
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