/* libecrypt - library for including ecrypt functions in programs */

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

void
ecrypt_gen(int N)
{
	int c = 0;
	int randomizer = 0;

	srand((unsigned int)(time(NULL)));

	char numbers[] = "1234567890";
	char letter[]  = "qwertyuiopasdfghjklzxcvbnm";
	char LETTER[]  = "QWERTYUIOPASDFGHJKLZXCVBNM";
	char symbols[] = "!@#$%^&*?";
	char password[N];

	randomizer = rand() % 4;

	for (c = 0; c < N; c++) {
		switch (randomizer) {
		case 1:
			password[c] = numbers[rand() % 10];
			randomizer = rand() % 4;
			printf("%c", password[c]);
			break;
		case 2:
			password[c] = symbols[rand() % 8];
			randomizer = rand() % 4;
			printf("%c", password[c]);
			break;
		case 3:
			password[c] = LETTER[rand() % 26];
			randomizer = rand() % 4;
			printf("%c", password[c]);
			break;
		default:
			password[c] = letter[rand() % 26];
			randomizer = rand() % 4;
			printf("%c", password[c]);
		}
	}
}

int
ecrypt_check(char *firstkey, char *secondkey)
{
	FILE *key1;
	FILE *key2;

	int cnt1 = 0;
	int cnt2 = 0;
	int flg = 0;

	key1 = fopen(firstkey, "r");
	if (key1 == NULL) {
		printf("error opening %s\n", firstkey);
		return 1;
	}

	fseek(key1, 0, SEEK_END);
	cnt1 = ftell(key1);

	key2 = fopen(secondkey, "r");
	if (key2 == NULL) {
		printf("error opening %s\n", secondkey);
		return 1;
	}

	fseek(key2, 0, SEEK_END);
	cnt2 = ftell(key2);

	fseek(key1, 0, SEEK_SET);
	fseek(key2, 0, SEEK_SET);

	if (cnt1 != cnt2) {
		printf("no match\n");
		return 1;
	} else {
		while (! feof(key1)) {
			if (fgetc(key1) != fgetc(key2)) {
				flg = 1;
				break;
			}
		}
		if (flg) {
			printf("no match\n");
			exit(1);
		} else {
			printf("match\n");
			exit(0);
		}
	}

	fclose(key1);
	fclose(key2);
}