C++ (Cpp) BN_BLINDING_get_thread_id Examples

Example #1

File: rsa_eay.c Project: 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;
}

Example #2

File: rsa_eay.c Project: 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;
}