Here is the interface to the hardware functionality

#define BLOCK_LENGTH 		UINTMAX_C(16)
#define MAX_IO_BUFFER_SIZE 	UINTMAX_C(2048)

int foo(uint8_t output_param[MAX_IO_BUFFER_SIZE],
		const uint8_t input_param[MAX_IO_BUFFER_SIZE],
		uint32_t length, 
		const uint8_t config1[16],
		const enum_t type,
		uint8_t const config2[BLOCK_LENGTH]);
		
Here is a snippet from the main.

int main(int argc, char* argv[])
{
	uint8_t output[MAX_IO_BUFFER_SIZE] = {0};
	
	uint8_t input[MAX_IO_BUFFER_SIZE] = {0};
	uint32_t length = BLOCK_LENGTH;
	uint8_t config_1[16] = {0};
	uint8_t config_2[BLOCK_LENGTH] = {0};

	...
	memcpys to init arrays
	...
	
	(void)foo(output, input, length, config_1, TYPE_0, config_1);

	return 0;
}