/*      
	This software is licensed under GPL-3, as shown in the file LICENSE
	Author: Linux Gruppe IRB
	Copyright: Linux Gruppe IRB, 2024
*/

#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <glib.h>
#include <pwd.h>

#include "authorized_eid.h"
#include "client.h"
#include "json.h"

int main(int argc, char *argv[])
{
	struct passwd *passwd;
	FILE *authorized_eid;
	char *res1, *res2;
	gchar *hash;
	CURL *curl;

	if ((curl = curl_easy_init()) == NULL)
	{
                fprintf(stderr, "curl_easy_init() failed");
                exit(-1);
        }

	port = 24727;
	res1 = eidResponse(curl);

	if (res1 == NULL)
	{
		fprintf(stderr, "Did not receive a valid result from the web\n");
		exit(-2);
	}

	res2 = json2txt(res1);

	if (res2 == NULL)
	{
		fprintf(stderr, "The result from the web could not be parsed\n");
		exit(-3);
	}

	hash = g_compute_checksum_for_string(G_CHECKSUM_SHA512, res2, strlen(res2));
	free(res2);
	errno = 0;

	if ((passwd = getpwuid(geteuid())) == NULL)
	{
		fprintf(stderr, "Error while trying to find passwd entry for effective UID %u: ", geteuid());

		if (errno != 0)
			fprintf(stderr, "%s\n", strerror(errno));
		else
			fprintf(stderr, "No such user\n");

		exit(-3);
	}

	if ((authorized_eid = auth_fopen(passwd, "a")) == NULL)
	{
		fprintf(stderr, "Could not open german eID card data file for writing\n");
		exit(-4);
	}

	fchmod(fileno(authorized_eid), S_IRUSR | S_IWUSR);
	fprintf(authorized_eid, "%s\n", hash);
	fclose(authorized_eid);
}