C++ (Cpp) RSA_setup_blinding Exemples

Exemple #1

Fichier : rsa_eay.c Projet : repos-holder/openbsd-patches

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

	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;

	if (BN_BLINDING_get_thread_id(ret) == CRYPTO_thread_id())
		{
		/* rsa->blinding is ours! */

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

		*local = 0; /* 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
		             */

		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;
}

Exemple #2

Fichier : rsa_ossl.c Projet : Bilibili/openssl

static BN_BLINDING *rsa_get_blinding(RSA *rsa, int *local, BN_CTX *ctx)
{
    BN_BLINDING *ret;

    CRYPTO_THREAD_write_lock(rsa->lock);

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

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

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

 err:
    CRYPTO_THREAD_unlock(rsa->lock);
    return ret;
}

Exemple #3

Fichier : rsa_eay.c Projet : mxOBS/debian_openssl

static BN_BLINDING *rsa_get_blinding(RSA *rsa, BIGNUM **r, int *local, BN_CTX *ctx)
{
	BN_BLINDING *ret;

	if (rsa->blinding == NULL)
		{
		if (rsa->blinding == NULL)
			{
			CRYPTO_w_lock(CRYPTO_LOCK_RSA);
			if (rsa->blinding == NULL)
				rsa->blinding = RSA_setup_blinding(rsa, ctx);
			CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
			}
		}

	ret = rsa->blinding;
	if (ret == NULL)
		return NULL;

	if (BN_BLINDING_get_thread_id(ret) != CRYPTO_thread_id())
		{
		*local = 0;
		if (rsa->mt_blinding == NULL)
			{
			CRYPTO_w_lock(CRYPTO_LOCK_RSA);
			if (rsa->mt_blinding == NULL)
				rsa->mt_blinding = RSA_setup_blinding(rsa, ctx);
			CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
			}
		ret = rsa->mt_blinding;
		}
	else
		*local = 1;

	return ret;
}

Exemple #4

int RSA_blinding_on(RSA *rsa, BN_CTX *ctx)
{
    int ret=0;

    if (rsa->blinding != NULL)
        RSA_blinding_off(rsa);

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

    rsa->flags |= RSA_FLAG_BLINDING;
    rsa->flags &= ~RSA_FLAG_NO_BLINDING;
    ret=1;
err:
    return(ret);
}