# Pastebin o0gRRMOk
==========this code block works =========

std::string output = "";
		unsigned char * output_array;
		int output_length = 0;
		output_length = decryptAES256(reinterpret_cast<const unsigned char*>(argv[2]), 
			reinterpret_cast<const unsigned char*>(argv[3]), 
			reinterpret_cast<const unsigned char*>(argv[4]),
			strlen(argv[4]),
			output_array,
			atoi(argv[5]),
			atoi(argv[6]),
			atoi(argv[7])
			);
		
		if(output_array != NULL){
			output = std::string(reinterpret_cast<char*>(output_array),output_length);
		}
		std::cout<< output <<endl;
		
		
==========this code block gives seg fault=======
std::string output;
		output = dec_aes_256(std::string(argv[2]),std::string(argv[3]),std::string(argv[4]),
			atoi(argv[5]),
			atoi(argv[6]),
			atoi(argv[7])
			);
		cout<< output << endl; 
		
cryptoLibraryCPPWrap.cpp  has

std::string dec_aes_256(std::string key, std::string iv, std::string input, int key_encoded, int iv_encoded, int input_encoded){
	std::string output = "";
	unsigned char * output_array = (unsigned char *)calloc(1,1);
	int output_length = 0;
	output_length = decryptAES256(reinterpret_cast<const unsigned char*>(key.c_str()), 
		reinterpret_cast<const unsigned char*>(iv.c_str()), 
		reinterpret_cast<const unsigned char*>(input.c_str()),
		input.length(),
		output_array,
		key_encoded,
		iv_encoded,
		input_encoded
		);
	
	if(output_array != NULL){
		output = std::string(reinterpret_cast<char*>(output_array),output_length);
	}
	return output;

}

cryptoLibraryCPPWrap.h has
std::string dec_aes_256(std::string key, std::string iv, std::string input, int key_encoded, int iv_encoded, int input_encoded);