C++ (Cpp) BN_BLINDING_thread_idの例

コード例 #1

ファイル: rsa_crpt.c プロジェクト: 1Project/SafeBoardMessenger

BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx)
{
    BIGNUM local_n;
    BIGNUM *e, *n;
    BN_CTX *ctx;
    BN_BLINDING *ret = NULL;

    if (in_ctx == NULL) {
        if ((ctx = BN_CTX_new()) == NULL)
            return 0;
    } else
        ctx = in_ctx;

    BN_CTX_start(ctx);
    e = BN_CTX_get(ctx);
    if (e == NULL) {
        RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    if (rsa->e == NULL) {
        e = rsa_get_public_exp(rsa->d, rsa->p, rsa->q, ctx);
        if (e == NULL) {
            RSAerr(RSA_F_RSA_SETUP_BLINDING, RSA_R_NO_PUBLIC_EXPONENT);
            goto err;
        }
    } else
        e = rsa->e;

    if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL) {
        /*
         * if PRNG is not properly seeded, resort to secret exponent as
         * unpredictable seed
         */
        RAND_add(rsa->d->d, rsa->d->dmax * sizeof rsa->d->d[0], 0.0);
    }

    if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {
        /* Set BN_FLG_CONSTTIME flag */
        n = &local_n;
        BN_with_flags(n, rsa->n, BN_FLG_CONSTTIME);
    } else
        n = rsa->n;

    ret = BN_BLINDING_create_param(NULL, e, n, ctx,
                                   rsa->meth->bn_mod_exp, rsa->_method_mod_n);
    if (ret == NULL) {
        RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_BN_LIB);
        goto err;
    }
    CRYPTO_THREADID_current(BN_BLINDING_thread_id(ret));
 err:
    BN_CTX_end(ctx);
    if (in_ctx == NULL)
        BN_CTX_free(ctx);
    if (rsa->e == NULL)
        BN_free(e);

    return ret;
}

コード例 #2

ファイル: rsa_crpt.c プロジェクト: hotelzululima/libopenssl

BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx)
{
    BIGNUM local_n;
    BIGNUM *e,*n;
    BN_CTX *ctx;
    BN_BLINDING *ret = NULL;

    if (in_ctx == NULL)
    {
        if ((ctx = BN_CTX_new()) == NULL) return 0;
    }
    else
        ctx = in_ctx;

    BN_CTX_start(ctx);
    e  = BN_CTX_get(ctx);
    if (e == NULL)
    {
        RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    if (rsa->e == NULL)
    {
        e = rsa_get_public_exp(rsa->d, rsa->p, rsa->q, ctx);
        if (e == NULL)
        {
            RSAerr(RSA_F_RSA_SETUP_BLINDING, RSA_R_NO_PUBLIC_EXPONENT);
            goto err;
        }
    }
    else
        e = rsa->e;

    if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME))
    {
        /* Set BN_FLG_CONSTTIME flag */
        n = &local_n;
        BN_with_flags(n, rsa->n, BN_FLG_CONSTTIME);
    }
    else
        n = rsa->n;

    ret = BN_BLINDING_create_param(NULL, e, n, ctx,
                                   rsa->meth->bn_mod_exp, rsa->_method_mod_n);
    if (ret == NULL)
    {
        RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_BN_LIB);
        goto err;
    }
    CRYPTO_THREADID_current(BN_BLINDING_thread_id(ret));
err:
    BN_CTX_end(ctx);
    if (in_ctx == NULL)
        BN_CTX_free(ctx);
    if(rsa->e == NULL)
        BN_free(e);

    return ret;
}

コード例 #3

ファイル: rsa_ossl.c プロジェクト: DarovskikhAndrei/openssl

static BN_BLINDING *rsa_get_blinding(RSA *rsa, int *local, BN_CTX *ctx)
{
    BN_BLINDING *ret;
    int got_write_lock = 0;
    CRYPTO_THREADID cur;

    CRYPTO_r_lock(CRYPTO_LOCK_RSA);

    if (rsa->blinding == NULL) {
        CRYPTO_r_unlock(CRYPTO_LOCK_RSA);
        CRYPTO_w_lock(CRYPTO_LOCK_RSA);
        got_write_lock = 1;

        if (rsa->blinding == NULL)
            rsa->blinding = RSA_setup_blinding(rsa, ctx);
    }

    ret = rsa->blinding;
    if (ret == NULL)
        goto err;

    CRYPTO_THREADID_current(&cur);
    if (!CRYPTO_THREADID_cmp(&cur, BN_BLINDING_thread_id(ret))) {
        /* rsa->blinding is ours! */

        *local = 1;
    } else {
        /* resort to rsa->mt_blinding instead */

        /*
         * instructs rsa_blinding_convert(), rsa_blinding_invert() that the
         * BN_BLINDING is shared, meaning that accesses require locks, and
         * that the blinding factor must be stored outside the BN_BLINDING
         */
        *local = 0;

        if (rsa->mt_blinding == NULL) {
            if (!got_write_lock) {
                CRYPTO_r_unlock(CRYPTO_LOCK_RSA);
                CRYPTO_w_lock(CRYPTO_LOCK_RSA);
                got_write_lock = 1;
            }

            if (rsa->mt_blinding == NULL)
                rsa->mt_blinding = RSA_setup_blinding(rsa, ctx);
        }
        ret = rsa->mt_blinding;
    }

 err:
    if (got_write_lock)
        CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
    else
        CRYPTO_r_unlock(CRYPTO_LOCK_RSA);
    return ret;
}