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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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  • 55eafe5
  • /
  • test
  • /
  • sm2_internal_test.c
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sm2_internal_test.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 can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/*
 * Low level APIs are deprecated for public use, but still ok for internal use.
 */
#include "internal/deprecated.h"

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

#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/bn.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include "testutil.h"

#ifndef OPENSSL_NO_SM2

# include "crypto/sm2.h"

static fake_random_generate_cb get_faked_bytes;

static OSSL_PROVIDER *fake_rand = NULL;
static uint8_t *fake_rand_bytes = NULL;
static size_t fake_rand_bytes_offset = 0;
static size_t fake_rand_size = 0;

static int get_faked_bytes(unsigned char *buf, size_t num,
                           ossl_unused const char *name,
                           ossl_unused EVP_RAND_CTX *ctx)
{
    if (!TEST_ptr(fake_rand_bytes) || !TEST_size_t_gt(fake_rand_size, 0))
        return 0;

    while (num-- > 0) {
        if (fake_rand_bytes_offset >= fake_rand_size)
            fake_rand_bytes_offset = 0;
        *buf++ = fake_rand_bytes[fake_rand_bytes_offset++];
    }

    return 1;
}

static int start_fake_rand(const char *hex_bytes)
{
    OPENSSL_free(fake_rand_bytes);
    fake_rand_bytes_offset = 0;
    fake_rand_size = strlen(hex_bytes) / 2;
    if (!TEST_ptr(fake_rand_bytes = OPENSSL_hexstr2buf(hex_bytes, NULL)))
        return 0;

    /* use own random function */
    fake_rand_set_public_private_callbacks(NULL, get_faked_bytes);
    return 1;

}

static void restore_rand(void)
{
    fake_rand_set_public_private_callbacks(NULL, NULL);
    OPENSSL_free(fake_rand_bytes);
    fake_rand_bytes = NULL;
    fake_rand_bytes_offset = 0;
}

static EC_GROUP *create_EC_group(const char *p_hex, const char *a_hex,
                                 const char *b_hex, const char *x_hex,
                                 const char *y_hex, const char *order_hex,
                                 const char *cof_hex)
{
    BIGNUM *p = NULL;
    BIGNUM *a = NULL;
    BIGNUM *b = NULL;
    BIGNUM *g_x = NULL;
    BIGNUM *g_y = NULL;
    BIGNUM *order = NULL;
    BIGNUM *cof = NULL;
    EC_POINT *generator = NULL;
    EC_GROUP *group = NULL;
    int ok = 0;

    if (!TEST_true(BN_hex2bn(&p, p_hex))
            || !TEST_true(BN_hex2bn(&a, a_hex))
            || !TEST_true(BN_hex2bn(&b, b_hex)))
        goto done;

    group = EC_GROUP_new_curve_GFp(p, a, b, NULL);
    if (!TEST_ptr(group))
        goto done;

    generator = EC_POINT_new(group);
    if (!TEST_ptr(generator))
        goto done;

    if (!TEST_true(BN_hex2bn(&g_x, x_hex))
            || !TEST_true(BN_hex2bn(&g_y, y_hex))
            || !TEST_true(EC_POINT_set_affine_coordinates(group, generator, g_x,
                                                          g_y, NULL)))
        goto done;

    if (!TEST_true(BN_hex2bn(&order, order_hex))
            || !TEST_true(BN_hex2bn(&cof, cof_hex))
            || !TEST_true(EC_GROUP_set_generator(group, generator, order, cof)))
        goto done;

    ok = 1;
done:
    BN_free(p);
    BN_free(a);
    BN_free(b);
    BN_free(g_x);
    BN_free(g_y);
    EC_POINT_free(generator);
    BN_free(order);
    BN_free(cof);
    if (!ok) {
        EC_GROUP_free(group);
        group = NULL;
    }

    return group;
}

static int test_sm2_crypt(const EC_GROUP *group,
                          const EVP_MD *digest,
                          const char *privkey_hex,
                          const char *message,
                          const char *k_hex, const char *ctext_hex)
{
    const size_t msg_len = strlen(message);
    BIGNUM *priv = NULL;
    EC_KEY *key = NULL;
    EC_POINT *pt = NULL;
    unsigned char *expected = OPENSSL_hexstr2buf(ctext_hex, NULL);
    size_t ctext_len = 0;
    size_t ptext_len = 0;
    uint8_t *ctext = NULL;
    uint8_t *recovered = NULL;
    size_t recovered_len = msg_len;
    int rc = 0;

    if (!TEST_ptr(expected)
            || !TEST_true(BN_hex2bn(&priv, privkey_hex)))
        goto done;

    key = EC_KEY_new();
    if (!TEST_ptr(key)
            || !TEST_true(EC_KEY_set_group(key, group))
            || !TEST_true(EC_KEY_set_private_key(key, priv)))
        goto done;

    pt = EC_POINT_new(group);
    if (!TEST_ptr(pt)
            || !TEST_true(EC_POINT_mul(group, pt, priv, NULL, NULL, NULL))
            || !TEST_true(EC_KEY_set_public_key(key, pt))
            || !TEST_true(ossl_sm2_ciphertext_size(key, digest, msg_len,
                                                   &ctext_len)))
        goto done;

    ctext = OPENSSL_zalloc(ctext_len);
    if (!TEST_ptr(ctext))
        goto done;

    start_fake_rand(k_hex);
    if (!TEST_true(ossl_sm2_encrypt(key, digest,
                                    (const uint8_t *)message, msg_len,
                                    ctext, &ctext_len))) {
        restore_rand();
        goto done;
    }
    restore_rand();

    if (!TEST_mem_eq(ctext, ctext_len, expected, ctext_len))
        goto done;

    if (!TEST_true(ossl_sm2_plaintext_size(ctext, ctext_len, &ptext_len))
            || !TEST_int_eq(ptext_len, msg_len))
        goto done;

    recovered = OPENSSL_zalloc(ptext_len);
    if (!TEST_ptr(recovered)
            || !TEST_true(ossl_sm2_decrypt(key, digest, ctext, ctext_len,
                                           recovered, &recovered_len))
            || !TEST_int_eq(recovered_len, msg_len)
            || !TEST_mem_eq(recovered, recovered_len, message, msg_len))
        goto done;

    rc = 1;
 done:
    BN_free(priv);
    EC_POINT_free(pt);
    OPENSSL_free(ctext);
    OPENSSL_free(recovered);
    OPENSSL_free(expected);
    EC_KEY_free(key);
    return rc;
}

static int sm2_crypt_test(void)
{
    int testresult = 0;
    EC_GROUP *gm_group = NULL;
    EC_GROUP *test_group =
        create_EC_group
        ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",
         "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",
         "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",
         "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",
         "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2",
         "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",
         "1");

    if (!TEST_ptr(test_group))
        goto done;

    if (!test_sm2_crypt(
            test_group,
            EVP_sm3(),
            "1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0",
            "encryption standard",
            "004C62EEFD6ECFC2B95B92FD6C3D9575148AFA17425546D49018E5388D49DD7B4F"
            "0092e8ff62146873c258557548500ab2df2a365e0609ab67640a1f6d57d7b17820"
            "008349312695a3e1d2f46905f39a766487f2432e95d6be0cb009fe8c69fd8825a7",
            "307B0220245C26FB68B1DDDDB12C4B6BF9F2B6D5FE60A383B0D18D1C4144ABF1"
            "7F6252E7022076CB9264C2A7E88E52B19903FDC47378F605E36811F5C07423A2"
            "4B84400F01B804209C3D7360C30156FAB7C80A0276712DA9D8094A634B766D3A"
            "285E07480653426D0413650053A89B41C418B0C3AAD00D886C00286467"))
        goto done;

    /* Same test as above except using SHA-256 instead of SM3 */
    if (!test_sm2_crypt(
            test_group,
            EVP_sha256(),
            "1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0",
            "encryption standard",
            "004C62EEFD6ECFC2B95B92FD6C3D9575148AFA17425546D49018E5388D49DD7B4F"
            "003da18008784352192d70f22c26c243174a447ba272fec64163dd4742bae8bc98"
            "00df17605cf304e9dd1dfeb90c015e93b393a6f046792f790a6fa4228af67d9588",
            "307B0220245C26FB68B1DDDDB12C4B6BF9F2B6D5FE60A383B0D18D1C4144ABF17F"
            "6252E7022076CB9264C2A7E88E52B19903FDC47378F605E36811F5C07423A24B84"
            "400F01B80420BE89139D07853100EFA763F60CBE30099EA3DF7F8F364F9D10A5E9"
            "88E3C5AAFC0413229E6C9AEE2BB92CAD649FE2C035689785DA33"))
        goto done;

    /* From Annex C in both GM/T0003.5-2012 and GB/T 32918.5-2016.*/
    gm_group = create_EC_group(
         "fffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff",
         "fffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc",
         "28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93",
         "32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7",
         "bc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0",
         "fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123",
         "1");

    if (!TEST_ptr(gm_group))
        goto done;

    if (!test_sm2_crypt(
            gm_group,
            EVP_sm3(),
            /* privkey (from which the encrypting public key is derived) */
            "3945208F7B2144B13F36E38AC6D39F95889393692860B51A42FB81EF4DF7C5B8",
            /* plaintext message */
            "encryption standard",
            /* ephemeral nonce k */
            "59276E27D506861A16680F3AD9C02DCCEF3CC1FA3CDBE4CE6D54B80DEAC1BC21",
            /*
             * expected ciphertext, the field values are from GM/T 0003.5-2012
             * (Annex C), but serialized following the ASN.1 format specified
             * in GM/T 0009-2012 (Sec. 7.2).
             */
            "307C" /* SEQUENCE, 0x7c bytes */
              "0220" /* INTEGER, 0x20 bytes */
                "04EBFC718E8D1798620432268E77FEB6415E2EDE0E073C0F4F640ECD2E149A73"
              "0221" /* INTEGER, 0x21 bytes */
                "00" /* leading 00 due to DER for pos. int with topmost bit set */
                "E858F9D81E5430A57B36DAAB8F950A3C64E6EE6A63094D99283AFF767E124DF0"
              "0420" /* OCTET STRING, 0x20 bytes */
                "59983C18F809E262923C53AEC295D30383B54E39D609D160AFCB1908D0BD8766"
              "0413" /* OCTET STRING, 0x13 bytes */
                "21886CA989CA9C7D58087307CA93092D651EFA"))
        goto done;

    testresult = 1;
 done:
    EC_GROUP_free(test_group);
    EC_GROUP_free(gm_group);

    return testresult;
}

static int test_sm2_sign(const EC_GROUP *group,
                         const char *userid,
                         const char *privkey_hex,
                         const char *message,
                         const char *k_hex,
                         const char *r_hex,
                         const char *s_hex)
{
    const size_t msg_len = strlen(message);
    int ok = 0;
    BIGNUM *priv = NULL;
    EC_POINT *pt = NULL;
    EC_KEY *key = NULL;
    ECDSA_SIG *sig = NULL;
    const BIGNUM *sig_r = NULL;
    const BIGNUM *sig_s = NULL;
    BIGNUM *r = NULL;
    BIGNUM *s = NULL;

    if (!TEST_true(BN_hex2bn(&priv, privkey_hex)))
        goto done;

    key = EC_KEY_new();
    if (!TEST_ptr(key)
            || !TEST_true(EC_KEY_set_group(key, group))
            || !TEST_true(EC_KEY_set_private_key(key, priv)))
        goto done;

    pt = EC_POINT_new(group);
    if (!TEST_ptr(pt)
            || !TEST_true(EC_POINT_mul(group, pt, priv, NULL, NULL, NULL))
            || !TEST_true(EC_KEY_set_public_key(key, pt)))
        goto done;

    start_fake_rand(k_hex);
    sig = ossl_sm2_do_sign(key, EVP_sm3(), (const uint8_t *)userid,
                           strlen(userid), (const uint8_t *)message, msg_len);
    if (!TEST_ptr(sig)) {
        restore_rand();
        goto done;
    }
    restore_rand();

    ECDSA_SIG_get0(sig, &sig_r, &sig_s);

    if (!TEST_true(BN_hex2bn(&r, r_hex))
            || !TEST_true(BN_hex2bn(&s, s_hex))
            || !TEST_BN_eq(r, sig_r)
            || !TEST_BN_eq(s, sig_s))
        goto done;

    ok = ossl_sm2_do_verify(key, EVP_sm3(), sig, (const uint8_t *)userid,
                            strlen(userid), (const uint8_t *)message, msg_len);

    /* We goto done whether this passes or fails */
    TEST_true(ok);

 done:
    ECDSA_SIG_free(sig);
    EC_POINT_free(pt);
    EC_KEY_free(key);
    BN_free(priv);
    BN_free(r);
    BN_free(s);

    return ok;
}

static int sm2_sig_test(void)
{
    int testresult = 0;
    EC_GROUP *gm_group = NULL;
    /* From draft-shen-sm2-ecdsa-02 */
    EC_GROUP *test_group =
        create_EC_group
        ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",
         "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",
         "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",
         "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",
         "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2",
         "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",
         "1");

    if (!TEST_ptr(test_group))
        goto done;

    if (!TEST_true(test_sm2_sign(
                        test_group,
                        "ALICE123@YAHOO.COM",
                        "128B2FA8BD433C6C068C8D803DFF79792A519A55171B1B650C23661D15897263",
                        "message digest",
                        "006CB28D99385C175C94F94E934817663FC176D925DD72B727260DBAAE1FB2F96F"
                        "007c47811054c6f99613a578eb8453706ccb96384fe7df5c171671e760bfa8be3a",
                        "40F1EC59F793D9F49E09DCEF49130D4194F79FB1EED2CAA55BACDB49C4E755D1",
                        "6FC6DAC32C5D5CF10C77DFB20F7C2EB667A457872FB09EC56327A67EC7DEEBE7")))
        goto done;

    /* From Annex A in both GM/T0003.5-2012 and GB/T 32918.5-2016.*/
    gm_group = create_EC_group(
        "fffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff",
        "fffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc",
        "28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93",
        "32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7",
        "bc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0",
        "fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123",
        "1");

    if (!TEST_ptr(gm_group))
        goto done;

    if (!TEST_true(test_sm2_sign(
                    gm_group,
                    /* the default ID specified in GM/T 0009-2012 (Sec. 10).*/
                    SM2_DEFAULT_USERID,
                    /* privkey */
                    "3945208F7B2144B13F36E38AC6D39F95889393692860B51A42FB81EF4DF7C5B8",
                    /* plaintext message */
                    "message digest",
                    /* ephemeral nonce k */
                    "59276E27D506861A16680F3AD9C02DCCEF3CC1FA3CDBE4CE6D54B80DEAC1BC21",
                    /* expected signature, the field values are from GM/T 0003.5-2012,
                       Annex A. */
                    /* signature R, 0x20 bytes */
                    "F5A03B0648D2C4630EEAC513E1BB81A15944DA3827D5B74143AC7EACEEE720B3",
                    /* signature S, 0x20 bytes */
                    "B1B6AA29DF212FD8763182BC0D421CA1BB9038FD1F7F42D4840B69C485BBC1AA")))
        goto done;

    testresult = 1;

 done:
    EC_GROUP_free(test_group);
    EC_GROUP_free(gm_group);

    return testresult;
}

#endif

int setup_tests(void)
{
#ifdef OPENSSL_NO_SM2
    TEST_note("SM2 is disabled.");
#else
    fake_rand = fake_rand_start(NULL);
    if (fake_rand == NULL)
        return 0;

    ADD_TEST(sm2_crypt_test);
    ADD_TEST(sm2_sig_test);
#endif
    return 1;
}

void cleanup_tests(void)
{
#ifndef OPENSSL_NO_SM2
    fake_rand_finish(fake_rand);
#endif
}
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