ObjFW  Diff

			@throw [OFOutOfMemoryException
			    exceptionWithRequestedSize: parallelization * 128 *
							blockSize];

		HMAC = [[OFHMAC alloc] initWithHashClass: [OFSHA256Hash class]];

		of_pbkdf2(HMAC, 1, salt, saltLength, password, passwordLength,
		    (unsigned char *)buffer, parallelization * 128 * blockSize);

		for (size_t i = 0; i < parallelization; i++)
			of_scrypt_romix(buffer + i * 32 * blockSize, blockSize,
			    costFactor, tmp);

		of_pbkdf2(HMAC, 1, (unsigned char *)buffer, parallelization *
		    128 * blockSize, password, passwordLength, key, keyLength);
	} @finally {
		of_explicit_memset(tmp, 0, (costFactor + 1) * blockSize * 128);
		free(tmp);

		of_explicit_memset(buffer, 0,
		    parallelization * 128 * blockSize);