#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include "ntru_crypto.h"

uint32_t get_rand(uint8_t *out, uint32_t num_bytes)
{
	int rng = 50;
	int urnd = open("/dev/random", O_RDONLY);
	read(urnd, &rng, sizeof(int));
	*out = urnd;
	close(urnd);
	return 0;
}
char * main(char user_input[])
{
    	uint8_t public_key[821];          /* sized for EES401EP2 */
    	uint16_t public_key_len;          /* no. of octets in public key */
    	uint8_t private_key[891];         /* sized for EES401EP2 */
    	uint16_t private_key_len;         /* no. of octets in private key */
    	uint16_t expected_private_key_len;
    	uint16_t expected_encoded_public_key_len;
    	uint8_t encoded_public_key[855];  /* sized for EES401EP2 */
    	uint16_t encoded_public_key_len;  /* no. of octets in encoded public key */
    	uint8_t ciphertext[816];          /* sized fof EES401EP2 */
    	uint16_t ciphertext_len;          /* no. of octets in ciphertext */
    	uint8_t plaintext[86];            /* size of AES-128 key */
    	uint16_t plaintext_len;           /* no. of octets in plaintext */
    	uint8_t *next = NULL;             /* points to next cert field to parse */
    	uint32_t next_len;                /* no. of octets it next */
    	DRBG_HANDLE drbg;                 /* handle for instantiated DRBG */
    	uint32_t rc;                      /* return code */
    	bool error = FALSE;               /* records if error occurred */
    	FILE *Handle=NULL;                /* File Handle for writing NTRU key to file */
	    char buffer[891];
	    char *buffer2 = 0;
	    char *c = malloc(86);
	    char *d = malloc(816);
	    int r;
        int s;

	    double cpu_time_used;
	    Handle=fopen("EES593/EES593-ntru-priv.raw", "rb");
	    r = fread(buffer,  1,891, Handle);
	    fclose(Handle);
            
	    
	    printf("C Log DEC: %d bytes Private Key\n", r);
        printf("C Log DEC: user_input Len %d\n", sizeof(user_input));

        strcpy(d, user_input);
	    rc = ntru_crypto_ntru_decrypt(r, buffer, 816,user_input,  &plaintext_len,  NULL);

	    rc = ntru_crypto_ntru_decrypt(r, buffer, 816,user_input,  &plaintext_len,  plaintext);

	    printf("C Log DEC : your plain: %s\n", plaintext);
	    printf("C Log DEC : your plain LEN: %d\n", plaintext_len);
	    //printf("your time spent: %lf\n", cpu_time_used);
        //snprintf(c, sizeof(c), "%s", plaintext);
        strcpy(c, plaintext);
	    return c;

        error: 
        	    printf("PROBLEM BUDDY %d\n", rc);
                exit(EXIT_FAILURE);
        	    return 0;
}